diff options
Diffstat (limited to 'apps/plugins')
71 files changed, 20252 insertions, 0 deletions
diff --git a/apps/plugins/CATEGORIES b/apps/plugins/CATEGORIES index c7cdd3fe53..4b759b080f 100644 --- a/apps/plugins/CATEGORIES +++ b/apps/plugins/CATEGORIES | |||
@@ -37,6 +37,7 @@ jpeg,viewers | |||
37 | keybox,apps | 37 | keybox,apps |
38 | lamp,apps | 38 | lamp,apps |
39 | logo,demos | 39 | logo,demos |
40 | lua,viewers | ||
40 | mandelbrot,demos | 41 | mandelbrot,demos |
41 | matrix,demos | 42 | matrix,demos |
42 | maze,games | 43 | maze,games |
diff --git a/apps/plugins/SOURCES b/apps/plugins/SOURCES index a695478e40..5fb62a9117 100644 --- a/apps/plugins/SOURCES +++ b/apps/plugins/SOURCES | |||
@@ -159,3 +159,8 @@ superdom.c | |||
159 | #endif | 159 | #endif |
160 | 160 | ||
161 | md5sum.c | 161 | md5sum.c |
162 | |||
163 | #if (PLUGIN_BUFFER_SIZE >= 0x80000) | ||
164 | lua.c | ||
165 | #endif | ||
166 | |||
diff --git a/apps/plugins/SUBDIRS b/apps/plugins/SUBDIRS index 597df41b8f..9c7745fd24 100644 --- a/apps/plugins/SUBDIRS +++ b/apps/plugins/SUBDIRS | |||
@@ -52,4 +52,9 @@ mpegplayer | |||
52 | #endif | 52 | #endif |
53 | #endif | 53 | #endif |
54 | 54 | ||
55 | /* Lua needs at least 160 KB to work in */ | ||
56 | #if (PLUGIN_BUFFER_SIZE >= 0x80000) | ||
57 | lua | ||
58 | #endif | ||
59 | |||
55 | #endif /* IRIVER_IFP7XX_SERIES */ | 60 | #endif /* IRIVER_IFP7XX_SERIES */ |
diff --git a/apps/plugins/lua.c b/apps/plugins/lua.c new file mode 100644 index 0000000000..a68e5c149a --- /dev/null +++ b/apps/plugins/lua.c | |||
@@ -0,0 +1,33 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * | ||
9 | * Overlay loader stub plugin for lua | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or | ||
12 | * modify it under the terms of the GNU General Public License | ||
13 | * as published by the Free Software Foundation; either version 2 | ||
14 | * of the License, or (at your option) any later version. | ||
15 | * | ||
16 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
17 | * KIND, either express or implied. | ||
18 | * | ||
19 | ****************************************************************************/ | ||
20 | #include "plugin.h" | ||
21 | |||
22 | #if PLUGIN_BUFFER_SIZE >= 0x80000 && !defined(SIMULATOR) | ||
23 | |||
24 | #include "lib/overlay.h" | ||
25 | |||
26 | PLUGIN_HEADER | ||
27 | |||
28 | /* this is the plugin entry point */ | ||
29 | enum plugin_status plugin_start(const void* parameter) | ||
30 | { | ||
31 | return run_overlay(parameter, VIEWERS_DIR "/lua.ovl", "LuaViewer"); | ||
32 | } | ||
33 | #endif | ||
diff --git a/apps/plugins/lua/Makefile b/apps/plugins/lua/Makefile new file mode 100644 index 0000000000..d2a40d38ad --- /dev/null +++ b/apps/plugins/lua/Makefile | |||
@@ -0,0 +1,86 @@ | |||
1 | # __________ __ ___. | ||
2 | # Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
3 | # Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
4 | # Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
5 | # Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
6 | # \/ \/ \/ \/ \/ | ||
7 | # | ||
8 | OPT_FLAGS=-O0 | ||
9 | |||
10 | INCLUDES = -I$(APPSDIR) -I.. -I. -I$(FIRMDIR)/include -I$(FIRMDIR)/export \ | ||
11 | -I$(FIRMDIR)/common -I$(FIRMDIR)/drivers -I$(OUTDIR) -I$(BUILDDIR) -I. $(TARGET_INC) | ||
12 | CFLAGS = $(INCLUDES) $(GCCOPTS) $(TARGET) $(EXTRA_DEFINES) \ | ||
13 | -DTARGET_ID=$(TARGET_ID) -DMEM=${MEMORYSIZE} -DPLUGIN $(OPT_FLAGS) $(PROFILE_OPTS) | ||
14 | |||
15 | ifdef APPEXTRA | ||
16 | INCLUDES += $(patsubst %,-I$(APPSDIR)/%,$(subst :, ,$(APPEXTRA))) | ||
17 | endif | ||
18 | |||
19 | LINKFILE := $(OBJDIR)/link.lds | ||
20 | DEPFILE = $(OBJDIR)/dep-lua | ||
21 | |||
22 | # This sets up 'SRC' based on the files mentioned in SOURCES | ||
23 | include $(TOOLSDIR)/makesrc.inc | ||
24 | |||
25 | SOURCES = $(SRC) | ||
26 | OBJS2 := $(SRC:%.c=$(OBJDIR)/%.o) | ||
27 | OBJS = $(patsubst %.S, $(OBJDIR)/%.o, $(OBJS2)) | ||
28 | DIRS = . | ||
29 | |||
30 | ifndef SIMVER | ||
31 | ifneq (,$(strip $(foreach tgt,RECORDER ONDIO,$(findstring $(tgt),$(TARGET))))) | ||
32 | LDS := archos.lds | ||
33 | OUTPUT = $(OUTDIR)/lua.ovl | ||
34 | else ## iRiver/iPod/... targets | ||
35 | LDS := ../plugin.lds | ||
36 | OUTPUT = $(OUTDIR)/lua.rock | ||
37 | endif | ||
38 | else ## simulators | ||
39 | OUTPUT = $(OUTDIR)/lua.rock | ||
40 | endif | ||
41 | |||
42 | all: $(OUTPUT) | ||
43 | |||
44 | ifndef SIMVER | ||
45 | $(OBJDIR)/lua.elf: $(OBJS) $(LINKFILE) | ||
46 | $(call PRINTS,LD $(@F))$(CC) $(CFLAGS) -o $@ $(OBJS) -L$(BUILDDIR) -lplugin -lgcc \ | ||
47 | -T$(LINKFILE) -Wl,--gc-sections -Wl,-Map,$(OBJDIR)/lua.map | ||
48 | |||
49 | $(OUTPUT): $(OBJDIR)/lua.elf | ||
50 | $(call PRINTS,OBJCOPY $(@F))$(OC) -O binary $< $@ | ||
51 | else | ||
52 | |||
53 | ifeq ($(SIMVER), sdl) | ||
54 | ################################################### | ||
55 | # This is the SDL simulator version | ||
56 | |||
57 | $(OUTPUT): $(OBJS) | ||
58 | $(call PRINTS,LD $(@F))$(CC) $(CFLAGS) $(SHARED_FLAG) $(OBJS) -L$(BUILDDIR) -lplugin -o $@ | ||
59 | ifeq ($(findstring CYGWIN,$(UNAME)),CYGWIN) | ||
60 | # 'x' must be kept or you'll have "Win32 error 5" | ||
61 | # $ fgrep 5 /usr/include/w32api/winerror.h | head -1 | ||
62 | # #define ERROR_ACCESS_DENIED 5L | ||
63 | else | ||
64 | @chmod -x $@ | ||
65 | endif | ||
66 | |||
67 | endif | ||
68 | endif # end of simulator section | ||
69 | |||
70 | |||
71 | include $(TOOLSDIR)/make.inc | ||
72 | |||
73 | # MEMORYSIZE should be passed on to this makefile with the chosen memory size | ||
74 | # given in number of MB | ||
75 | $(LINKFILE): $(LDS) | ||
76 | $(call PRINTS,build $(@F))cat $< | $(CC) -DMEMORYSIZE=$(MEMORYSIZE) $(INCLUDES) $(TARGET) \ | ||
77 | $(DEFINES) -E -P - >$@ | ||
78 | ./action_helper.pl > actions.lua | ||
79 | echo $(pwd) | ||
80 | |||
81 | clean: | ||
82 | $(call PRINTS,cleaning lua)rm -rf $(OBJDIR)/lua | ||
83 | $(SILENT)rm -f $(OBJDIR)/lua.* $(DEPFILE) | ||
84 | |||
85 | -include $(DEPFILE) | ||
86 | |||
diff --git a/apps/plugins/lua/README b/apps/plugins/lua/README new file mode 100644 index 0000000000..593aad2ee7 --- /dev/null +++ b/apps/plugins/lua/README | |||
@@ -0,0 +1,19 @@ | |||
1 | The following files are (with slight modifications for Rockbox) from dietlibc | ||
2 | version 0.31 which is licensed under the GPL version 2: | ||
3 | |||
4 | strcspn.c | ||
5 | strncat.c | ||
6 | strpbrk.c | ||
7 | strtol.c | ||
8 | strtoul.c | ||
9 | strstr.c | ||
10 | |||
11 | The malloc routine is Doug Lea's malloc with the following license: | ||
12 | |||
13 | Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) | ||
14 | |||
15 | This is a version (aka dlmalloc) of malloc/free/realloc written by | ||
16 | Doug Lea and released to the public domain, as explained at | ||
17 | http://creativecommons.org/licenses/publicdomain. Send questions, | ||
18 | comments, complaints, performance data, etc to dl@cs.oswego.edu | ||
19 | |||
diff --git a/apps/plugins/lua/SOURCES b/apps/plugins/lua/SOURCES new file mode 100644 index 0000000000..3b9f9348bd --- /dev/null +++ b/apps/plugins/lua/SOURCES | |||
@@ -0,0 +1,33 @@ | |||
1 | lauxlib.c | ||
2 | lapi.c | ||
3 | lbaselib.c | ||
4 | lcode.c | ||
5 | ldebug.c | ||
6 | ldo.c | ||
7 | ldump.c | ||
8 | lfunc.c | ||
9 | lgc.c | ||
10 | llex.c | ||
11 | lmem.c | ||
12 | lobject.c | ||
13 | lopcodes.c | ||
14 | lparser.c | ||
15 | lstate.c | ||
16 | lstring.c | ||
17 | lstrlib.c | ||
18 | ltable.c | ||
19 | ltablib.c | ||
20 | ltm.c | ||
21 | lundump.c | ||
22 | lvm.c | ||
23 | lzio.c | ||
24 | rockaux.c | ||
25 | rocklib.c | ||
26 | rockmalloc.c | ||
27 | strcspn.c | ||
28 | strncat.c | ||
29 | strpbrk.c | ||
30 | strtoul.c | ||
31 | strtol.c | ||
32 | strstr.c | ||
33 | rocklua.c | ||
diff --git a/apps/plugins/lua/action_helper.pl b/apps/plugins/lua/action_helper.pl new file mode 100755 index 0000000000..fdf45798b5 --- /dev/null +++ b/apps/plugins/lua/action_helper.pl | |||
@@ -0,0 +1,40 @@ | |||
1 | #!/usr/bin/env perl | ||
2 | ############################################################################ | ||
3 | # __________ __ ___. | ||
4 | # Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
5 | # Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
6 | # Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
7 | # Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
8 | # \/ \/ \/ \/ \/ | ||
9 | # $Id$ | ||
10 | # | ||
11 | # Copyright (C) 2009 by Maurus Cuelenaere | ||
12 | # | ||
13 | # All files in this archive are subject to the GNU General Public License. | ||
14 | # See the file COPYING in the source tree root for full license agreement. | ||
15 | # | ||
16 | # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
17 | # KIND, either express or implied. | ||
18 | # | ||
19 | ############################################################################ | ||
20 | |||
21 | $input = "../../action.h"; | ||
22 | |||
23 | open(ACTION, "<$input") or die "Can't open $input!"; | ||
24 | |||
25 | print "rb.actions = {\n"; | ||
26 | |||
27 | $i = 0; | ||
28 | while(my $line = <ACTION>) | ||
29 | { | ||
30 | chomp($line); | ||
31 | if($line =~ /^\s*(ACTION_[^\s]+)(\s*=.*)?,$/) | ||
32 | { | ||
33 | printf "\t%s = %d,\n", $1, $i; | ||
34 | $i++; | ||
35 | } | ||
36 | } | ||
37 | |||
38 | print "}\n"; | ||
39 | |||
40 | close(ACTION); | ||
diff --git a/apps/plugins/lua/lapi.c b/apps/plugins/lua/lapi.c new file mode 100644 index 0000000000..487d6b173a --- /dev/null +++ b/apps/plugins/lua/lapi.c | |||
@@ -0,0 +1,1087 @@ | |||
1 | /* | ||
2 | ** $Id: lapi.c,v 2.55.1.5 2008/07/04 18:41:18 roberto Exp $ | ||
3 | ** Lua API | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | /* #include <assert.h> */ | ||
9 | #include <math.h> | ||
10 | #include <stdarg.h> | ||
11 | #include <string.h> | ||
12 | |||
13 | #define lapi_c | ||
14 | #define LUA_CORE | ||
15 | |||
16 | #include "lua.h" | ||
17 | |||
18 | #include "lapi.h" | ||
19 | #include "ldebug.h" | ||
20 | #include "ldo.h" | ||
21 | #include "lfunc.h" | ||
22 | #include "lgc.h" | ||
23 | #include "lmem.h" | ||
24 | #include "lobject.h" | ||
25 | #include "lstate.h" | ||
26 | #include "lstring.h" | ||
27 | #include "ltable.h" | ||
28 | #include "ltm.h" | ||
29 | #include "lundump.h" | ||
30 | #include "lvm.h" | ||
31 | |||
32 | |||
33 | |||
34 | const char lua_ident[] = | ||
35 | "$Lua: " LUA_RELEASE " " LUA_COPYRIGHT " $\n" | ||
36 | "$Authors: " LUA_AUTHORS " $\n" | ||
37 | "$URL: www.lua.org $\n"; | ||
38 | |||
39 | |||
40 | |||
41 | #define api_checknelems(L, n) api_check(L, (n) <= (L->top - L->base)) | ||
42 | |||
43 | #define api_checkvalidindex(L, i) api_check(L, (i) != luaO_nilobject) | ||
44 | |||
45 | #define api_incr_top(L) {api_check(L, L->top < L->ci->top); L->top++;} | ||
46 | |||
47 | |||
48 | |||
49 | static TValue *index2adr (lua_State *L, int idx) { | ||
50 | if (idx > 0) { | ||
51 | TValue *o = L->base + (idx - 1); | ||
52 | api_check(L, idx <= L->ci->top - L->base); | ||
53 | if (o >= L->top) return cast(TValue *, luaO_nilobject); | ||
54 | else return o; | ||
55 | } | ||
56 | else if (idx > LUA_REGISTRYINDEX) { | ||
57 | api_check(L, idx != 0 && -idx <= L->top - L->base); | ||
58 | return L->top + idx; | ||
59 | } | ||
60 | else switch (idx) { /* pseudo-indices */ | ||
61 | case LUA_REGISTRYINDEX: return registry(L); | ||
62 | case LUA_ENVIRONINDEX: { | ||
63 | Closure *func = curr_func(L); | ||
64 | sethvalue(L, &L->env, func->c.env); | ||
65 | return &L->env; | ||
66 | } | ||
67 | case LUA_GLOBALSINDEX: return gt(L); | ||
68 | default: { | ||
69 | Closure *func = curr_func(L); | ||
70 | idx = LUA_GLOBALSINDEX - idx; | ||
71 | return (idx <= func->c.nupvalues) | ||
72 | ? &func->c.upvalue[idx-1] | ||
73 | : cast(TValue *, luaO_nilobject); | ||
74 | } | ||
75 | } | ||
76 | } | ||
77 | |||
78 | |||
79 | static Table *getcurrenv (lua_State *L) { | ||
80 | if (L->ci == L->base_ci) /* no enclosing function? */ | ||
81 | return hvalue(gt(L)); /* use global table as environment */ | ||
82 | else { | ||
83 | Closure *func = curr_func(L); | ||
84 | return func->c.env; | ||
85 | } | ||
86 | } | ||
87 | |||
88 | |||
89 | void luaA_pushobject (lua_State *L, const TValue *o) { | ||
90 | setobj2s(L, L->top, o); | ||
91 | api_incr_top(L); | ||
92 | } | ||
93 | |||
94 | |||
95 | LUA_API int lua_checkstack (lua_State *L, int size) { | ||
96 | int res = 1; | ||
97 | lua_lock(L); | ||
98 | if (size > LUAI_MAXCSTACK || (L->top - L->base + size) > LUAI_MAXCSTACK) | ||
99 | res = 0; /* stack overflow */ | ||
100 | else if (size > 0) { | ||
101 | luaD_checkstack(L, size); | ||
102 | if (L->ci->top < L->top + size) | ||
103 | L->ci->top = L->top + size; | ||
104 | } | ||
105 | lua_unlock(L); | ||
106 | return res; | ||
107 | } | ||
108 | |||
109 | |||
110 | LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) { | ||
111 | int i; | ||
112 | if (from == to) return; | ||
113 | lua_lock(to); | ||
114 | api_checknelems(from, n); | ||
115 | api_check(from, G(from) == G(to)); | ||
116 | api_check(from, to->ci->top - to->top >= n); | ||
117 | from->top -= n; | ||
118 | for (i = 0; i < n; i++) { | ||
119 | setobj2s(to, to->top++, from->top + i); | ||
120 | } | ||
121 | lua_unlock(to); | ||
122 | } | ||
123 | |||
124 | |||
125 | LUA_API void lua_setlevel (lua_State *from, lua_State *to) { | ||
126 | to->nCcalls = from->nCcalls; | ||
127 | } | ||
128 | |||
129 | |||
130 | LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) { | ||
131 | lua_CFunction old; | ||
132 | lua_lock(L); | ||
133 | old = G(L)->panic; | ||
134 | G(L)->panic = panicf; | ||
135 | lua_unlock(L); | ||
136 | return old; | ||
137 | } | ||
138 | |||
139 | |||
140 | LUA_API lua_State *lua_newthread (lua_State *L) { | ||
141 | lua_State *L1; | ||
142 | lua_lock(L); | ||
143 | luaC_checkGC(L); | ||
144 | L1 = luaE_newthread(L); | ||
145 | setthvalue(L, L->top, L1); | ||
146 | api_incr_top(L); | ||
147 | lua_unlock(L); | ||
148 | luai_userstatethread(L, L1); | ||
149 | return L1; | ||
150 | } | ||
151 | |||
152 | |||
153 | |||
154 | /* | ||
155 | ** basic stack manipulation | ||
156 | */ | ||
157 | |||
158 | |||
159 | LUA_API int lua_gettop (lua_State *L) { | ||
160 | return cast_int(L->top - L->base); | ||
161 | } | ||
162 | |||
163 | |||
164 | LUA_API void lua_settop (lua_State *L, int idx) { | ||
165 | lua_lock(L); | ||
166 | if (idx >= 0) { | ||
167 | api_check(L, idx <= L->stack_last - L->base); | ||
168 | while (L->top < L->base + idx) | ||
169 | setnilvalue(L->top++); | ||
170 | L->top = L->base + idx; | ||
171 | } | ||
172 | else { | ||
173 | api_check(L, -(idx+1) <= (L->top - L->base)); | ||
174 | L->top += idx+1; /* `subtract' index (index is negative) */ | ||
175 | } | ||
176 | lua_unlock(L); | ||
177 | } | ||
178 | |||
179 | |||
180 | LUA_API void lua_remove (lua_State *L, int idx) { | ||
181 | StkId p; | ||
182 | lua_lock(L); | ||
183 | p = index2adr(L, idx); | ||
184 | api_checkvalidindex(L, p); | ||
185 | while (++p < L->top) setobjs2s(L, p-1, p); | ||
186 | L->top--; | ||
187 | lua_unlock(L); | ||
188 | } | ||
189 | |||
190 | |||
191 | LUA_API void lua_insert (lua_State *L, int idx) { | ||
192 | StkId p; | ||
193 | StkId q; | ||
194 | lua_lock(L); | ||
195 | p = index2adr(L, idx); | ||
196 | api_checkvalidindex(L, p); | ||
197 | for (q = L->top; q>p; q--) setobjs2s(L, q, q-1); | ||
198 | setobjs2s(L, p, L->top); | ||
199 | lua_unlock(L); | ||
200 | } | ||
201 | |||
202 | |||
203 | LUA_API void lua_replace (lua_State *L, int idx) { | ||
204 | StkId o; | ||
205 | lua_lock(L); | ||
206 | /* explicit test for incompatible code */ | ||
207 | if (idx == LUA_ENVIRONINDEX && L->ci == L->base_ci) | ||
208 | luaG_runerror(L, "no calling environment"); | ||
209 | api_checknelems(L, 1); | ||
210 | o = index2adr(L, idx); | ||
211 | api_checkvalidindex(L, o); | ||
212 | if (idx == LUA_ENVIRONINDEX) { | ||
213 | Closure *func = curr_func(L); | ||
214 | api_check(L, ttistable(L->top - 1)); | ||
215 | func->c.env = hvalue(L->top - 1); | ||
216 | luaC_barrier(L, func, L->top - 1); | ||
217 | } | ||
218 | else { | ||
219 | setobj(L, o, L->top - 1); | ||
220 | if (idx < LUA_GLOBALSINDEX) /* function upvalue? */ | ||
221 | luaC_barrier(L, curr_func(L), L->top - 1); | ||
222 | } | ||
223 | L->top--; | ||
224 | lua_unlock(L); | ||
225 | } | ||
226 | |||
227 | |||
228 | LUA_API void lua_pushvalue (lua_State *L, int idx) { | ||
229 | lua_lock(L); | ||
230 | setobj2s(L, L->top, index2adr(L, idx)); | ||
231 | api_incr_top(L); | ||
232 | lua_unlock(L); | ||
233 | } | ||
234 | |||
235 | |||
236 | |||
237 | /* | ||
238 | ** access functions (stack -> C) | ||
239 | */ | ||
240 | |||
241 | |||
242 | LUA_API int lua_type (lua_State *L, int idx) { | ||
243 | StkId o = index2adr(L, idx); | ||
244 | return (o == luaO_nilobject) ? LUA_TNONE : ttype(o); | ||
245 | } | ||
246 | |||
247 | |||
248 | LUA_API const char *lua_typename (lua_State *L, int t) { | ||
249 | UNUSED(L); | ||
250 | return (t == LUA_TNONE) ? "no value" : luaT_typenames[t]; | ||
251 | } | ||
252 | |||
253 | |||
254 | LUA_API int lua_iscfunction (lua_State *L, int idx) { | ||
255 | StkId o = index2adr(L, idx); | ||
256 | return iscfunction(o); | ||
257 | } | ||
258 | |||
259 | |||
260 | LUA_API int lua_isnumber (lua_State *L, int idx) { | ||
261 | TValue n; | ||
262 | const TValue *o = index2adr(L, idx); | ||
263 | return tonumber(o, &n); | ||
264 | } | ||
265 | |||
266 | |||
267 | LUA_API int lua_isstring (lua_State *L, int idx) { | ||
268 | int t = lua_type(L, idx); | ||
269 | return (t == LUA_TSTRING || t == LUA_TNUMBER); | ||
270 | } | ||
271 | |||
272 | |||
273 | LUA_API int lua_isuserdata (lua_State *L, int idx) { | ||
274 | const TValue *o = index2adr(L, idx); | ||
275 | return (ttisuserdata(o) || ttislightuserdata(o)); | ||
276 | } | ||
277 | |||
278 | |||
279 | LUA_API int lua_rawequal (lua_State *L, int index1, int index2) { | ||
280 | StkId o1 = index2adr(L, index1); | ||
281 | StkId o2 = index2adr(L, index2); | ||
282 | return (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 | ||
283 | : luaO_rawequalObj(o1, o2); | ||
284 | } | ||
285 | |||
286 | |||
287 | LUA_API int lua_equal (lua_State *L, int index1, int index2) { | ||
288 | StkId o1, o2; | ||
289 | int i; | ||
290 | lua_lock(L); /* may call tag method */ | ||
291 | o1 = index2adr(L, index1); | ||
292 | o2 = index2adr(L, index2); | ||
293 | i = (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 : equalobj(L, o1, o2); | ||
294 | lua_unlock(L); | ||
295 | return i; | ||
296 | } | ||
297 | |||
298 | |||
299 | LUA_API int lua_lessthan (lua_State *L, int index1, int index2) { | ||
300 | StkId o1, o2; | ||
301 | int i; | ||
302 | lua_lock(L); /* may call tag method */ | ||
303 | o1 = index2adr(L, index1); | ||
304 | o2 = index2adr(L, index2); | ||
305 | i = (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 | ||
306 | : luaV_lessthan(L, o1, o2); | ||
307 | lua_unlock(L); | ||
308 | return i; | ||
309 | } | ||
310 | |||
311 | |||
312 | |||
313 | LUA_API lua_Number lua_tonumber (lua_State *L, int idx) { | ||
314 | TValue n; | ||
315 | const TValue *o = index2adr(L, idx); | ||
316 | if (tonumber(o, &n)) | ||
317 | return nvalue(o); | ||
318 | else | ||
319 | return 0; | ||
320 | } | ||
321 | |||
322 | |||
323 | LUA_API lua_Integer lua_tointeger (lua_State *L, int idx) { | ||
324 | TValue n; | ||
325 | const TValue *o = index2adr(L, idx); | ||
326 | if (tonumber(o, &n)) { | ||
327 | lua_Integer res; | ||
328 | lua_Number num = nvalue(o); | ||
329 | lua_number2integer(res, num); | ||
330 | return res; | ||
331 | } | ||
332 | else | ||
333 | return 0; | ||
334 | } | ||
335 | |||
336 | |||
337 | LUA_API int lua_toboolean (lua_State *L, int idx) { | ||
338 | const TValue *o = index2adr(L, idx); | ||
339 | return !l_isfalse(o); | ||
340 | } | ||
341 | |||
342 | |||
343 | LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) { | ||
344 | StkId o = index2adr(L, idx); | ||
345 | if (!ttisstring(o)) { | ||
346 | lua_lock(L); /* `luaV_tostring' may create a new string */ | ||
347 | if (!luaV_tostring(L, o)) { /* conversion failed? */ | ||
348 | if (len != NULL) *len = 0; | ||
349 | lua_unlock(L); | ||
350 | return NULL; | ||
351 | } | ||
352 | luaC_checkGC(L); | ||
353 | o = index2adr(L, idx); /* previous call may reallocate the stack */ | ||
354 | lua_unlock(L); | ||
355 | } | ||
356 | if (len != NULL) *len = tsvalue(o)->len; | ||
357 | return svalue(o); | ||
358 | } | ||
359 | |||
360 | |||
361 | LUA_API size_t lua_objlen (lua_State *L, int idx) { | ||
362 | StkId o = index2adr(L, idx); | ||
363 | switch (ttype(o)) { | ||
364 | case LUA_TSTRING: return tsvalue(o)->len; | ||
365 | case LUA_TUSERDATA: return uvalue(o)->len; | ||
366 | case LUA_TTABLE: return luaH_getn(hvalue(o)); | ||
367 | case LUA_TNUMBER: { | ||
368 | size_t l; | ||
369 | lua_lock(L); /* `luaV_tostring' may create a new string */ | ||
370 | l = (luaV_tostring(L, o) ? tsvalue(o)->len : 0); | ||
371 | lua_unlock(L); | ||
372 | return l; | ||
373 | } | ||
374 | default: return 0; | ||
375 | } | ||
376 | } | ||
377 | |||
378 | |||
379 | LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) { | ||
380 | StkId o = index2adr(L, idx); | ||
381 | return (!iscfunction(o)) ? NULL : clvalue(o)->c.f; | ||
382 | } | ||
383 | |||
384 | |||
385 | LUA_API void *lua_touserdata (lua_State *L, int idx) { | ||
386 | StkId o = index2adr(L, idx); | ||
387 | switch (ttype(o)) { | ||
388 | case LUA_TUSERDATA: return (rawuvalue(o) + 1); | ||
389 | case LUA_TLIGHTUSERDATA: return pvalue(o); | ||
390 | default: return NULL; | ||
391 | } | ||
392 | } | ||
393 | |||
394 | |||
395 | LUA_API lua_State *lua_tothread (lua_State *L, int idx) { | ||
396 | StkId o = index2adr(L, idx); | ||
397 | return (!ttisthread(o)) ? NULL : thvalue(o); | ||
398 | } | ||
399 | |||
400 | |||
401 | LUA_API const void *lua_topointer (lua_State *L, int idx) { | ||
402 | StkId o = index2adr(L, idx); | ||
403 | switch (ttype(o)) { | ||
404 | case LUA_TTABLE: return hvalue(o); | ||
405 | case LUA_TFUNCTION: return clvalue(o); | ||
406 | case LUA_TTHREAD: return thvalue(o); | ||
407 | case LUA_TUSERDATA: | ||
408 | case LUA_TLIGHTUSERDATA: | ||
409 | return lua_touserdata(L, idx); | ||
410 | default: return NULL; | ||
411 | } | ||
412 | } | ||
413 | |||
414 | |||
415 | |||
416 | /* | ||
417 | ** push functions (C -> stack) | ||
418 | */ | ||
419 | |||
420 | |||
421 | LUA_API void lua_pushnil (lua_State *L) { | ||
422 | lua_lock(L); | ||
423 | setnilvalue(L->top); | ||
424 | api_incr_top(L); | ||
425 | lua_unlock(L); | ||
426 | } | ||
427 | |||
428 | |||
429 | LUA_API void lua_pushnumber (lua_State *L, lua_Number n) { | ||
430 | lua_lock(L); | ||
431 | setnvalue(L->top, n); | ||
432 | api_incr_top(L); | ||
433 | lua_unlock(L); | ||
434 | } | ||
435 | |||
436 | |||
437 | LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) { | ||
438 | lua_lock(L); | ||
439 | setnvalue(L->top, cast_num(n)); | ||
440 | api_incr_top(L); | ||
441 | lua_unlock(L); | ||
442 | } | ||
443 | |||
444 | |||
445 | LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) { | ||
446 | lua_lock(L); | ||
447 | luaC_checkGC(L); | ||
448 | setsvalue2s(L, L->top, luaS_newlstr(L, s, len)); | ||
449 | api_incr_top(L); | ||
450 | lua_unlock(L); | ||
451 | } | ||
452 | |||
453 | |||
454 | LUA_API void lua_pushstring (lua_State *L, const char *s) { | ||
455 | if (s == NULL) | ||
456 | lua_pushnil(L); | ||
457 | else | ||
458 | lua_pushlstring(L, s, strlen(s)); | ||
459 | } | ||
460 | |||
461 | |||
462 | LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt, | ||
463 | va_list argp) { | ||
464 | const char *ret; | ||
465 | lua_lock(L); | ||
466 | luaC_checkGC(L); | ||
467 | ret = luaO_pushvfstring(L, fmt, argp); | ||
468 | lua_unlock(L); | ||
469 | return ret; | ||
470 | } | ||
471 | |||
472 | |||
473 | LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) { | ||
474 | const char *ret; | ||
475 | va_list argp; | ||
476 | lua_lock(L); | ||
477 | luaC_checkGC(L); | ||
478 | va_start(argp, fmt); | ||
479 | ret = luaO_pushvfstring(L, fmt, argp); | ||
480 | va_end(argp); | ||
481 | lua_unlock(L); | ||
482 | return ret; | ||
483 | } | ||
484 | |||
485 | |||
486 | LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) { | ||
487 | Closure *cl; | ||
488 | lua_lock(L); | ||
489 | luaC_checkGC(L); | ||
490 | api_checknelems(L, n); | ||
491 | cl = luaF_newCclosure(L, n, getcurrenv(L)); | ||
492 | cl->c.f = fn; | ||
493 | L->top -= n; | ||
494 | while (n--) | ||
495 | setobj2n(L, &cl->c.upvalue[n], L->top+n); | ||
496 | setclvalue(L, L->top, cl); | ||
497 | lua_assert(iswhite(obj2gco(cl))); | ||
498 | api_incr_top(L); | ||
499 | lua_unlock(L); | ||
500 | } | ||
501 | |||
502 | |||
503 | LUA_API void lua_pushboolean (lua_State *L, int b) { | ||
504 | lua_lock(L); | ||
505 | setbvalue(L->top, (b != 0)); /* ensure that true is 1 */ | ||
506 | api_incr_top(L); | ||
507 | lua_unlock(L); | ||
508 | } | ||
509 | |||
510 | |||
511 | LUA_API void lua_pushlightuserdata (lua_State *L, void *p) { | ||
512 | lua_lock(L); | ||
513 | setpvalue(L->top, p); | ||
514 | api_incr_top(L); | ||
515 | lua_unlock(L); | ||
516 | } | ||
517 | |||
518 | |||
519 | LUA_API int lua_pushthread (lua_State *L) { | ||
520 | lua_lock(L); | ||
521 | setthvalue(L, L->top, L); | ||
522 | api_incr_top(L); | ||
523 | lua_unlock(L); | ||
524 | return (G(L)->mainthread == L); | ||
525 | } | ||
526 | |||
527 | |||
528 | |||
529 | /* | ||
530 | ** get functions (Lua -> stack) | ||
531 | */ | ||
532 | |||
533 | |||
534 | LUA_API void lua_gettable (lua_State *L, int idx) { | ||
535 | StkId t; | ||
536 | lua_lock(L); | ||
537 | t = index2adr(L, idx); | ||
538 | api_checkvalidindex(L, t); | ||
539 | luaV_gettable(L, t, L->top - 1, L->top - 1); | ||
540 | lua_unlock(L); | ||
541 | } | ||
542 | |||
543 | |||
544 | LUA_API void lua_getfield (lua_State *L, int idx, const char *k) { | ||
545 | StkId t; | ||
546 | TValue key; | ||
547 | lua_lock(L); | ||
548 | t = index2adr(L, idx); | ||
549 | api_checkvalidindex(L, t); | ||
550 | setsvalue(L, &key, luaS_new(L, k)); | ||
551 | luaV_gettable(L, t, &key, L->top); | ||
552 | api_incr_top(L); | ||
553 | lua_unlock(L); | ||
554 | } | ||
555 | |||
556 | |||
557 | LUA_API void lua_rawget (lua_State *L, int idx) { | ||
558 | StkId t; | ||
559 | lua_lock(L); | ||
560 | t = index2adr(L, idx); | ||
561 | api_check(L, ttistable(t)); | ||
562 | setobj2s(L, L->top - 1, luaH_get(hvalue(t), L->top - 1)); | ||
563 | lua_unlock(L); | ||
564 | } | ||
565 | |||
566 | |||
567 | LUA_API void lua_rawgeti (lua_State *L, int idx, int n) { | ||
568 | StkId o; | ||
569 | lua_lock(L); | ||
570 | o = index2adr(L, idx); | ||
571 | api_check(L, ttistable(o)); | ||
572 | setobj2s(L, L->top, luaH_getnum(hvalue(o), n)); | ||
573 | api_incr_top(L); | ||
574 | lua_unlock(L); | ||
575 | } | ||
576 | |||
577 | |||
578 | LUA_API void lua_createtable (lua_State *L, int narray, int nrec) { | ||
579 | lua_lock(L); | ||
580 | luaC_checkGC(L); | ||
581 | sethvalue(L, L->top, luaH_new(L, narray, nrec)); | ||
582 | api_incr_top(L); | ||
583 | lua_unlock(L); | ||
584 | } | ||
585 | |||
586 | |||
587 | LUA_API int lua_getmetatable (lua_State *L, int objindex) { | ||
588 | const TValue *obj; | ||
589 | Table *mt = NULL; | ||
590 | int res; | ||
591 | lua_lock(L); | ||
592 | obj = index2adr(L, objindex); | ||
593 | switch (ttype(obj)) { | ||
594 | case LUA_TTABLE: | ||
595 | mt = hvalue(obj)->metatable; | ||
596 | break; | ||
597 | case LUA_TUSERDATA: | ||
598 | mt = uvalue(obj)->metatable; | ||
599 | break; | ||
600 | default: | ||
601 | mt = G(L)->mt[ttype(obj)]; | ||
602 | break; | ||
603 | } | ||
604 | if (mt == NULL) | ||
605 | res = 0; | ||
606 | else { | ||
607 | sethvalue(L, L->top, mt); | ||
608 | api_incr_top(L); | ||
609 | res = 1; | ||
610 | } | ||
611 | lua_unlock(L); | ||
612 | return res; | ||
613 | } | ||
614 | |||
615 | |||
616 | LUA_API void lua_getfenv (lua_State *L, int idx) { | ||
617 | StkId o; | ||
618 | lua_lock(L); | ||
619 | o = index2adr(L, idx); | ||
620 | api_checkvalidindex(L, o); | ||
621 | switch (ttype(o)) { | ||
622 | case LUA_TFUNCTION: | ||
623 | sethvalue(L, L->top, clvalue(o)->c.env); | ||
624 | break; | ||
625 | case LUA_TUSERDATA: | ||
626 | sethvalue(L, L->top, uvalue(o)->env); | ||
627 | break; | ||
628 | case LUA_TTHREAD: | ||
629 | setobj2s(L, L->top, gt(thvalue(o))); | ||
630 | break; | ||
631 | default: | ||
632 | setnilvalue(L->top); | ||
633 | break; | ||
634 | } | ||
635 | api_incr_top(L); | ||
636 | lua_unlock(L); | ||
637 | } | ||
638 | |||
639 | |||
640 | /* | ||
641 | ** set functions (stack -> Lua) | ||
642 | */ | ||
643 | |||
644 | |||
645 | LUA_API void lua_settable (lua_State *L, int idx) { | ||
646 | StkId t; | ||
647 | lua_lock(L); | ||
648 | api_checknelems(L, 2); | ||
649 | t = index2adr(L, idx); | ||
650 | api_checkvalidindex(L, t); | ||
651 | luaV_settable(L, t, L->top - 2, L->top - 1); | ||
652 | L->top -= 2; /* pop index and value */ | ||
653 | lua_unlock(L); | ||
654 | } | ||
655 | |||
656 | |||
657 | LUA_API void lua_setfield (lua_State *L, int idx, const char *k) { | ||
658 | StkId t; | ||
659 | TValue key; | ||
660 | lua_lock(L); | ||
661 | api_checknelems(L, 1); | ||
662 | t = index2adr(L, idx); | ||
663 | api_checkvalidindex(L, t); | ||
664 | setsvalue(L, &key, luaS_new(L, k)); | ||
665 | luaV_settable(L, t, &key, L->top - 1); | ||
666 | L->top--; /* pop value */ | ||
667 | lua_unlock(L); | ||
668 | } | ||
669 | |||
670 | |||
671 | LUA_API void lua_rawset (lua_State *L, int idx) { | ||
672 | StkId t; | ||
673 | lua_lock(L); | ||
674 | api_checknelems(L, 2); | ||
675 | t = index2adr(L, idx); | ||
676 | api_check(L, ttistable(t)); | ||
677 | setobj2t(L, luaH_set(L, hvalue(t), L->top-2), L->top-1); | ||
678 | luaC_barriert(L, hvalue(t), L->top-1); | ||
679 | L->top -= 2; | ||
680 | lua_unlock(L); | ||
681 | } | ||
682 | |||
683 | |||
684 | LUA_API void lua_rawseti (lua_State *L, int idx, int n) { | ||
685 | StkId o; | ||
686 | lua_lock(L); | ||
687 | api_checknelems(L, 1); | ||
688 | o = index2adr(L, idx); | ||
689 | api_check(L, ttistable(o)); | ||
690 | setobj2t(L, luaH_setnum(L, hvalue(o), n), L->top-1); | ||
691 | luaC_barriert(L, hvalue(o), L->top-1); | ||
692 | L->top--; | ||
693 | lua_unlock(L); | ||
694 | } | ||
695 | |||
696 | |||
697 | LUA_API int lua_setmetatable (lua_State *L, int objindex) { | ||
698 | TValue *obj; | ||
699 | Table *mt; | ||
700 | lua_lock(L); | ||
701 | api_checknelems(L, 1); | ||
702 | obj = index2adr(L, objindex); | ||
703 | api_checkvalidindex(L, obj); | ||
704 | if (ttisnil(L->top - 1)) | ||
705 | mt = NULL; | ||
706 | else { | ||
707 | api_check(L, ttistable(L->top - 1)); | ||
708 | mt = hvalue(L->top - 1); | ||
709 | } | ||
710 | switch (ttype(obj)) { | ||
711 | case LUA_TTABLE: { | ||
712 | hvalue(obj)->metatable = mt; | ||
713 | if (mt) | ||
714 | luaC_objbarriert(L, hvalue(obj), mt); | ||
715 | break; | ||
716 | } | ||
717 | case LUA_TUSERDATA: { | ||
718 | uvalue(obj)->metatable = mt; | ||
719 | if (mt) | ||
720 | luaC_objbarrier(L, rawuvalue(obj), mt); | ||
721 | break; | ||
722 | } | ||
723 | default: { | ||
724 | G(L)->mt[ttype(obj)] = mt; | ||
725 | break; | ||
726 | } | ||
727 | } | ||
728 | L->top--; | ||
729 | lua_unlock(L); | ||
730 | return 1; | ||
731 | } | ||
732 | |||
733 | |||
734 | LUA_API int lua_setfenv (lua_State *L, int idx) { | ||
735 | StkId o; | ||
736 | int res = 1; | ||
737 | lua_lock(L); | ||
738 | api_checknelems(L, 1); | ||
739 | o = index2adr(L, idx); | ||
740 | api_checkvalidindex(L, o); | ||
741 | api_check(L, ttistable(L->top - 1)); | ||
742 | switch (ttype(o)) { | ||
743 | case LUA_TFUNCTION: | ||
744 | clvalue(o)->c.env = hvalue(L->top - 1); | ||
745 | break; | ||
746 | case LUA_TUSERDATA: | ||
747 | uvalue(o)->env = hvalue(L->top - 1); | ||
748 | break; | ||
749 | case LUA_TTHREAD: | ||
750 | sethvalue(L, gt(thvalue(o)), hvalue(L->top - 1)); | ||
751 | break; | ||
752 | default: | ||
753 | res = 0; | ||
754 | break; | ||
755 | } | ||
756 | if (res) luaC_objbarrier(L, gcvalue(o), hvalue(L->top - 1)); | ||
757 | L->top--; | ||
758 | lua_unlock(L); | ||
759 | return res; | ||
760 | } | ||
761 | |||
762 | |||
763 | /* | ||
764 | ** `load' and `call' functions (run Lua code) | ||
765 | */ | ||
766 | |||
767 | |||
768 | #define adjustresults(L,nres) \ | ||
769 | { if (nres == LUA_MULTRET && L->top >= L->ci->top) L->ci->top = L->top; } | ||
770 | |||
771 | |||
772 | #define checkresults(L,na,nr) \ | ||
773 | api_check(L, (nr) == LUA_MULTRET || (L->ci->top - L->top >= (nr) - (na))) | ||
774 | |||
775 | |||
776 | LUA_API void lua_call (lua_State *L, int nargs, int nresults) { | ||
777 | StkId func; | ||
778 | lua_lock(L); | ||
779 | api_checknelems(L, nargs+1); | ||
780 | checkresults(L, nargs, nresults); | ||
781 | func = L->top - (nargs+1); | ||
782 | luaD_call(L, func, nresults); | ||
783 | adjustresults(L, nresults); | ||
784 | lua_unlock(L); | ||
785 | } | ||
786 | |||
787 | |||
788 | |||
789 | /* | ||
790 | ** Execute a protected call. | ||
791 | */ | ||
792 | struct CallS { /* data to `f_call' */ | ||
793 | StkId func; | ||
794 | int nresults; | ||
795 | }; | ||
796 | |||
797 | |||
798 | static void f_call (lua_State *L, void *ud) { | ||
799 | struct CallS *c = cast(struct CallS *, ud); | ||
800 | luaD_call(L, c->func, c->nresults); | ||
801 | } | ||
802 | |||
803 | |||
804 | |||
805 | LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) { | ||
806 | struct CallS c; | ||
807 | int status; | ||
808 | ptrdiff_t func; | ||
809 | lua_lock(L); | ||
810 | api_checknelems(L, nargs+1); | ||
811 | checkresults(L, nargs, nresults); | ||
812 | if (errfunc == 0) | ||
813 | func = 0; | ||
814 | else { | ||
815 | StkId o = index2adr(L, errfunc); | ||
816 | api_checkvalidindex(L, o); | ||
817 | func = savestack(L, o); | ||
818 | } | ||
819 | c.func = L->top - (nargs+1); /* function to be called */ | ||
820 | c.nresults = nresults; | ||
821 | status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func); | ||
822 | adjustresults(L, nresults); | ||
823 | lua_unlock(L); | ||
824 | return status; | ||
825 | } | ||
826 | |||
827 | |||
828 | /* | ||
829 | ** Execute a protected C call. | ||
830 | */ | ||
831 | struct CCallS { /* data to `f_Ccall' */ | ||
832 | lua_CFunction func; | ||
833 | void *ud; | ||
834 | }; | ||
835 | |||
836 | |||
837 | static void f_Ccall (lua_State *L, void *ud) { | ||
838 | struct CCallS *c = cast(struct CCallS *, ud); | ||
839 | Closure *cl; | ||
840 | cl = luaF_newCclosure(L, 0, getcurrenv(L)); | ||
841 | cl->c.f = c->func; | ||
842 | setclvalue(L, L->top, cl); /* push function */ | ||
843 | api_incr_top(L); | ||
844 | setpvalue(L->top, c->ud); /* push only argument */ | ||
845 | api_incr_top(L); | ||
846 | luaD_call(L, L->top - 2, 0); | ||
847 | } | ||
848 | |||
849 | |||
850 | LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) { | ||
851 | struct CCallS c; | ||
852 | int status; | ||
853 | lua_lock(L); | ||
854 | c.func = func; | ||
855 | c.ud = ud; | ||
856 | status = luaD_pcall(L, f_Ccall, &c, savestack(L, L->top), 0); | ||
857 | lua_unlock(L); | ||
858 | return status; | ||
859 | } | ||
860 | |||
861 | |||
862 | LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data, | ||
863 | const char *chunkname) { | ||
864 | ZIO z; | ||
865 | int status; | ||
866 | lua_lock(L); | ||
867 | if (!chunkname) chunkname = "?"; | ||
868 | luaZ_init(L, &z, reader, data); | ||
869 | status = luaD_protectedparser(L, &z, chunkname); | ||
870 | lua_unlock(L); | ||
871 | return status; | ||
872 | } | ||
873 | |||
874 | |||
875 | LUA_API int lua_dump (lua_State *L, lua_Writer writer, void *data) { | ||
876 | int status; | ||
877 | TValue *o; | ||
878 | lua_lock(L); | ||
879 | api_checknelems(L, 1); | ||
880 | o = L->top - 1; | ||
881 | if (isLfunction(o)) | ||
882 | status = luaU_dump(L, clvalue(o)->l.p, writer, data, 0); | ||
883 | else | ||
884 | status = 1; | ||
885 | lua_unlock(L); | ||
886 | return status; | ||
887 | } | ||
888 | |||
889 | |||
890 | LUA_API int lua_status (lua_State *L) { | ||
891 | return L->status; | ||
892 | } | ||
893 | |||
894 | |||
895 | /* | ||
896 | ** Garbage-collection function | ||
897 | */ | ||
898 | |||
899 | LUA_API int lua_gc (lua_State *L, int what, int data) { | ||
900 | int res = 0; | ||
901 | global_State *g; | ||
902 | lua_lock(L); | ||
903 | g = G(L); | ||
904 | switch (what) { | ||
905 | case LUA_GCSTOP: { | ||
906 | g->GCthreshold = MAX_LUMEM; | ||
907 | break; | ||
908 | } | ||
909 | case LUA_GCRESTART: { | ||
910 | g->GCthreshold = g->totalbytes; | ||
911 | break; | ||
912 | } | ||
913 | case LUA_GCCOLLECT: { | ||
914 | luaC_fullgc(L); | ||
915 | break; | ||
916 | } | ||
917 | case LUA_GCCOUNT: { | ||
918 | /* GC values are expressed in Kbytes: #bytes/2^10 */ | ||
919 | res = cast_int(g->totalbytes >> 10); | ||
920 | break; | ||
921 | } | ||
922 | case LUA_GCCOUNTB: { | ||
923 | res = cast_int(g->totalbytes & 0x3ff); | ||
924 | break; | ||
925 | } | ||
926 | case LUA_GCSTEP: { | ||
927 | lu_mem a = (cast(lu_mem, data) << 10); | ||
928 | if (a <= g->totalbytes) | ||
929 | g->GCthreshold = g->totalbytes - a; | ||
930 | else | ||
931 | g->GCthreshold = 0; | ||
932 | while (g->GCthreshold <= g->totalbytes) { | ||
933 | luaC_step(L); | ||
934 | if (g->gcstate == GCSpause) { /* end of cycle? */ | ||
935 | res = 1; /* signal it */ | ||
936 | break; | ||
937 | } | ||
938 | } | ||
939 | break; | ||
940 | } | ||
941 | case LUA_GCSETPAUSE: { | ||
942 | res = g->gcpause; | ||
943 | g->gcpause = data; | ||
944 | break; | ||
945 | } | ||
946 | case LUA_GCSETSTEPMUL: { | ||
947 | res = g->gcstepmul; | ||
948 | g->gcstepmul = data; | ||
949 | break; | ||
950 | } | ||
951 | default: res = -1; /* invalid option */ | ||
952 | } | ||
953 | lua_unlock(L); | ||
954 | return res; | ||
955 | } | ||
956 | |||
957 | |||
958 | |||
959 | /* | ||
960 | ** miscellaneous functions | ||
961 | */ | ||
962 | |||
963 | |||
964 | LUA_API int lua_error (lua_State *L) { | ||
965 | lua_lock(L); | ||
966 | api_checknelems(L, 1); | ||
967 | luaG_errormsg(L); | ||
968 | lua_unlock(L); | ||
969 | return 0; /* to avoid warnings */ | ||
970 | } | ||
971 | |||
972 | |||
973 | LUA_API int lua_next (lua_State *L, int idx) { | ||
974 | StkId t; | ||
975 | int more; | ||
976 | lua_lock(L); | ||
977 | t = index2adr(L, idx); | ||
978 | api_check(L, ttistable(t)); | ||
979 | more = luaH_next(L, hvalue(t), L->top - 1); | ||
980 | if (more) { | ||
981 | api_incr_top(L); | ||
982 | } | ||
983 | else /* no more elements */ | ||
984 | L->top -= 1; /* remove key */ | ||
985 | lua_unlock(L); | ||
986 | return more; | ||
987 | } | ||
988 | |||
989 | |||
990 | LUA_API void lua_concat (lua_State *L, int n) { | ||
991 | lua_lock(L); | ||
992 | api_checknelems(L, n); | ||
993 | if (n >= 2) { | ||
994 | luaC_checkGC(L); | ||
995 | luaV_concat(L, n, cast_int(L->top - L->base) - 1); | ||
996 | L->top -= (n-1); | ||
997 | } | ||
998 | else if (n == 0) { /* push empty string */ | ||
999 | setsvalue2s(L, L->top, luaS_newlstr(L, "", 0)); | ||
1000 | api_incr_top(L); | ||
1001 | } | ||
1002 | /* else n == 1; nothing to do */ | ||
1003 | lua_unlock(L); | ||
1004 | } | ||
1005 | |||
1006 | |||
1007 | LUA_API lua_Alloc lua_getallocf (lua_State *L, void **ud) { | ||
1008 | lua_Alloc f; | ||
1009 | lua_lock(L); | ||
1010 | if (ud) *ud = G(L)->ud; | ||
1011 | f = G(L)->frealloc; | ||
1012 | lua_unlock(L); | ||
1013 | return f; | ||
1014 | } | ||
1015 | |||
1016 | |||
1017 | LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud) { | ||
1018 | lua_lock(L); | ||
1019 | G(L)->ud = ud; | ||
1020 | G(L)->frealloc = f; | ||
1021 | lua_unlock(L); | ||
1022 | } | ||
1023 | |||
1024 | |||
1025 | LUA_API void *lua_newuserdata (lua_State *L, size_t size) { | ||
1026 | Udata *u; | ||
1027 | lua_lock(L); | ||
1028 | luaC_checkGC(L); | ||
1029 | u = luaS_newudata(L, size, getcurrenv(L)); | ||
1030 | setuvalue(L, L->top, u); | ||
1031 | api_incr_top(L); | ||
1032 | lua_unlock(L); | ||
1033 | return u + 1; | ||
1034 | } | ||
1035 | |||
1036 | |||
1037 | |||
1038 | |||
1039 | static const char *aux_upvalue (StkId fi, int n, TValue **val) { | ||
1040 | Closure *f; | ||
1041 | if (!ttisfunction(fi)) return NULL; | ||
1042 | f = clvalue(fi); | ||
1043 | if (f->c.isC) { | ||
1044 | if (!(1 <= n && n <= f->c.nupvalues)) return NULL; | ||
1045 | *val = &f->c.upvalue[n-1]; | ||
1046 | return ""; | ||
1047 | } | ||
1048 | else { | ||
1049 | Proto *p = f->l.p; | ||
1050 | if (!(1 <= n && n <= p->sizeupvalues)) return NULL; | ||
1051 | *val = f->l.upvals[n-1]->v; | ||
1052 | return getstr(p->upvalues[n-1]); | ||
1053 | } | ||
1054 | } | ||
1055 | |||
1056 | |||
1057 | LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) { | ||
1058 | const char *name; | ||
1059 | TValue *val; | ||
1060 | lua_lock(L); | ||
1061 | name = aux_upvalue(index2adr(L, funcindex), n, &val); | ||
1062 | if (name) { | ||
1063 | setobj2s(L, L->top, val); | ||
1064 | api_incr_top(L); | ||
1065 | } | ||
1066 | lua_unlock(L); | ||
1067 | return name; | ||
1068 | } | ||
1069 | |||
1070 | |||
1071 | LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) { | ||
1072 | const char *name; | ||
1073 | TValue *val; | ||
1074 | StkId fi; | ||
1075 | lua_lock(L); | ||
1076 | fi = index2adr(L, funcindex); | ||
1077 | api_checknelems(L, 1); | ||
1078 | name = aux_upvalue(fi, n, &val); | ||
1079 | if (name) { | ||
1080 | L->top--; | ||
1081 | setobj(L, val, L->top); | ||
1082 | luaC_barrier(L, clvalue(fi), L->top); | ||
1083 | } | ||
1084 | lua_unlock(L); | ||
1085 | return name; | ||
1086 | } | ||
1087 | |||
diff --git a/apps/plugins/lua/lapi.h b/apps/plugins/lua/lapi.h new file mode 100644 index 0000000000..f968ffc992 --- /dev/null +++ b/apps/plugins/lua/lapi.h | |||
@@ -0,0 +1,16 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Auxiliary functions from Lua API | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lapi_h | ||
8 | #define lapi_h | ||
9 | |||
10 | |||
11 | #include "lobject.h" | ||
12 | |||
13 | |||
14 | LUAI_FUNC void luaA_pushobject (lua_State *L, const TValue *o); | ||
15 | |||
16 | #endif | ||
diff --git a/apps/plugins/lua/lauxlib.c b/apps/plugins/lua/lauxlib.c new file mode 100644 index 0000000000..a755266bde --- /dev/null +++ b/apps/plugins/lua/lauxlib.c | |||
@@ -0,0 +1,669 @@ | |||
1 | /* | ||
2 | ** $Id: lauxlib.c,v 1.159.1.3 2008/01/21 13:20:51 roberto Exp $ | ||
3 | ** Auxiliary functions for building Lua libraries | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <ctype.h> | ||
9 | #include <errno.h> | ||
10 | #include <stdarg.h> | ||
11 | #include <stdio.h> | ||
12 | #include <stdlib.h> | ||
13 | #include <string.h> | ||
14 | |||
15 | |||
16 | /* This file uses only the official API of Lua. | ||
17 | ** Any function declared here could be written as an application function. | ||
18 | */ | ||
19 | |||
20 | #define lauxlib_c | ||
21 | #define LUA_LIB | ||
22 | |||
23 | #include "lua.h" | ||
24 | |||
25 | #include "lauxlib.h" | ||
26 | |||
27 | |||
28 | #define FREELIST_REF 0 /* free list of references */ | ||
29 | |||
30 | |||
31 | /* convert a stack index to positive */ | ||
32 | #define abs_index(L, i) ((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \ | ||
33 | lua_gettop(L) + (i) + 1) | ||
34 | |||
35 | |||
36 | /* | ||
37 | ** {====================================================== | ||
38 | ** Error-report functions | ||
39 | ** ======================================================= | ||
40 | */ | ||
41 | |||
42 | |||
43 | LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) { | ||
44 | lua_Debug ar; | ||
45 | if (!lua_getstack(L, 0, &ar)) /* no stack frame? */ | ||
46 | return luaL_error(L, "bad argument #%d (%s)", narg, extramsg); | ||
47 | lua_getinfo(L, "n", &ar); | ||
48 | if (strcmp(ar.namewhat, "method") == 0) { | ||
49 | narg--; /* do not count `self' */ | ||
50 | if (narg == 0) /* error is in the self argument itself? */ | ||
51 | return luaL_error(L, "calling " LUA_QS " on bad self (%s)", | ||
52 | ar.name, extramsg); | ||
53 | } | ||
54 | if (ar.name == NULL) | ||
55 | ar.name = "?"; | ||
56 | return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)", | ||
57 | narg, ar.name, extramsg); | ||
58 | } | ||
59 | |||
60 | |||
61 | LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname) { | ||
62 | const char *msg = lua_pushfstring(L, "%s expected, got %s", | ||
63 | tname, luaL_typename(L, narg)); | ||
64 | return luaL_argerror(L, narg, msg); | ||
65 | } | ||
66 | |||
67 | |||
68 | static void tag_error (lua_State *L, int narg, int tag) { | ||
69 | luaL_typerror(L, narg, lua_typename(L, tag)); | ||
70 | } | ||
71 | |||
72 | |||
73 | LUALIB_API void luaL_where (lua_State *L, int level) { | ||
74 | lua_Debug ar; | ||
75 | if (lua_getstack(L, level, &ar)) { /* check function at level */ | ||
76 | lua_getinfo(L, "Sl", &ar); /* get info about it */ | ||
77 | if (ar.currentline > 0) { /* is there info? */ | ||
78 | lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline); | ||
79 | return; | ||
80 | } | ||
81 | } | ||
82 | lua_pushliteral(L, ""); /* else, no information available... */ | ||
83 | } | ||
84 | |||
85 | |||
86 | LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) { | ||
87 | va_list argp; | ||
88 | va_start(argp, fmt); | ||
89 | luaL_where(L, 1); | ||
90 | lua_pushvfstring(L, fmt, argp); | ||
91 | va_end(argp); | ||
92 | lua_concat(L, 2); | ||
93 | return lua_error(L); | ||
94 | } | ||
95 | |||
96 | /* }====================================================== */ | ||
97 | |||
98 | |||
99 | LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def, | ||
100 | const char *const lst[]) { | ||
101 | const char *name = (def) ? luaL_optstring(L, narg, def) : | ||
102 | luaL_checkstring(L, narg); | ||
103 | int i; | ||
104 | for (i=0; lst[i]; i++) | ||
105 | if (strcmp(lst[i], name) == 0) | ||
106 | return i; | ||
107 | return luaL_argerror(L, narg, | ||
108 | lua_pushfstring(L, "invalid option " LUA_QS, name)); | ||
109 | } | ||
110 | |||
111 | |||
112 | LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) { | ||
113 | lua_getfield(L, LUA_REGISTRYINDEX, tname); /* get registry.name */ | ||
114 | if (!lua_isnil(L, -1)) /* name already in use? */ | ||
115 | return 0; /* leave previous value on top, but return 0 */ | ||
116 | lua_pop(L, 1); | ||
117 | lua_newtable(L); /* create metatable */ | ||
118 | lua_pushvalue(L, -1); | ||
119 | lua_setfield(L, LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ | ||
120 | return 1; | ||
121 | } | ||
122 | |||
123 | |||
124 | LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) { | ||
125 | void *p = lua_touserdata(L, ud); | ||
126 | if (p != NULL) { /* value is a userdata? */ | ||
127 | if (lua_getmetatable(L, ud)) { /* does it have a metatable? */ | ||
128 | lua_getfield(L, LUA_REGISTRYINDEX, tname); /* get correct metatable */ | ||
129 | if (lua_rawequal(L, -1, -2)) { /* does it have the correct mt? */ | ||
130 | lua_pop(L, 2); /* remove both metatables */ | ||
131 | return p; | ||
132 | } | ||
133 | } | ||
134 | } | ||
135 | luaL_typerror(L, ud, tname); /* else error */ | ||
136 | return NULL; /* to avoid warnings */ | ||
137 | } | ||
138 | |||
139 | |||
140 | LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) { | ||
141 | if (!lua_checkstack(L, space)) | ||
142 | luaL_error(L, "stack overflow (%s)", mes); | ||
143 | } | ||
144 | |||
145 | |||
146 | LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) { | ||
147 | if (lua_type(L, narg) != t) | ||
148 | tag_error(L, narg, t); | ||
149 | } | ||
150 | |||
151 | |||
152 | LUALIB_API void luaL_checkany (lua_State *L, int narg) { | ||
153 | if (lua_type(L, narg) == LUA_TNONE) | ||
154 | luaL_argerror(L, narg, "value expected"); | ||
155 | } | ||
156 | |||
157 | |||
158 | LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) { | ||
159 | const char *s = lua_tolstring(L, narg, len); | ||
160 | if (!s) tag_error(L, narg, LUA_TSTRING); | ||
161 | return s; | ||
162 | } | ||
163 | |||
164 | |||
165 | LUALIB_API const char *luaL_optlstring (lua_State *L, int narg, | ||
166 | const char *def, size_t *len) { | ||
167 | if (lua_isnoneornil(L, narg)) { | ||
168 | if (len) | ||
169 | *len = (def ? strlen(def) : 0); | ||
170 | return def; | ||
171 | } | ||
172 | else return luaL_checklstring(L, narg, len); | ||
173 | } | ||
174 | |||
175 | |||
176 | LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) { | ||
177 | lua_Number d = lua_tonumber(L, narg); | ||
178 | if (d == 0 && !lua_isnumber(L, narg)) /* avoid extra test when d is not 0 */ | ||
179 | tag_error(L, narg, LUA_TNUMBER); | ||
180 | return d; | ||
181 | } | ||
182 | |||
183 | |||
184 | LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) { | ||
185 | return luaL_opt(L, luaL_checknumber, narg, def); | ||
186 | } | ||
187 | |||
188 | |||
189 | LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) { | ||
190 | lua_Integer d = lua_tointeger(L, narg); | ||
191 | if (d == 0 && !lua_isnumber(L, narg)) /* avoid extra test when d is not 0 */ | ||
192 | tag_error(L, narg, LUA_TNUMBER); | ||
193 | return d; | ||
194 | } | ||
195 | |||
196 | |||
197 | LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg, | ||
198 | lua_Integer def) { | ||
199 | return luaL_opt(L, luaL_checkinteger, narg, def); | ||
200 | } | ||
201 | |||
202 | |||
203 | LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) { | ||
204 | if (!lua_getmetatable(L, obj)) /* no metatable? */ | ||
205 | return 0; | ||
206 | lua_pushstring(L, event); | ||
207 | lua_rawget(L, -2); | ||
208 | if (lua_isnil(L, -1)) { | ||
209 | lua_pop(L, 2); /* remove metatable and metafield */ | ||
210 | return 0; | ||
211 | } | ||
212 | else { | ||
213 | lua_remove(L, -2); /* remove only metatable */ | ||
214 | return 1; | ||
215 | } | ||
216 | } | ||
217 | |||
218 | |||
219 | LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) { | ||
220 | obj = abs_index(L, obj); | ||
221 | if (!luaL_getmetafield(L, obj, event)) /* no metafield? */ | ||
222 | return 0; | ||
223 | lua_pushvalue(L, obj); | ||
224 | lua_call(L, 1, 1); | ||
225 | return 1; | ||
226 | } | ||
227 | |||
228 | |||
229 | LUALIB_API void (luaL_register) (lua_State *L, const char *libname, | ||
230 | const luaL_Reg *l) { | ||
231 | luaI_openlib(L, libname, l, 0); | ||
232 | } | ||
233 | |||
234 | |||
235 | static int libsize (const luaL_Reg *l) { | ||
236 | int size = 0; | ||
237 | for (; l->name; l++) size++; | ||
238 | return size; | ||
239 | } | ||
240 | |||
241 | |||
242 | LUALIB_API void luaI_openlib (lua_State *L, const char *libname, | ||
243 | const luaL_Reg *l, int nup) { | ||
244 | if (libname) { | ||
245 | int size = libsize(l); | ||
246 | /* check whether lib already exists */ | ||
247 | luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1); | ||
248 | lua_getfield(L, -1, libname); /* get _LOADED[libname] */ | ||
249 | if (!lua_istable(L, -1)) { /* not found? */ | ||
250 | lua_pop(L, 1); /* remove previous result */ | ||
251 | /* try global variable (and create one if it does not exist) */ | ||
252 | if (luaL_findtable(L, LUA_GLOBALSINDEX, libname, size) != NULL) | ||
253 | luaL_error(L, "name conflict for module " LUA_QS, libname); | ||
254 | lua_pushvalue(L, -1); | ||
255 | lua_setfield(L, -3, libname); /* _LOADED[libname] = new table */ | ||
256 | } | ||
257 | lua_remove(L, -2); /* remove _LOADED table */ | ||
258 | lua_insert(L, -(nup+1)); /* move library table to below upvalues */ | ||
259 | } | ||
260 | for (; l->name; l++) { | ||
261 | int i; | ||
262 | for (i=0; i<nup; i++) /* copy upvalues to the top */ | ||
263 | lua_pushvalue(L, -nup); | ||
264 | lua_pushcclosure(L, l->func, nup); | ||
265 | lua_setfield(L, -(nup+2), l->name); | ||
266 | } | ||
267 | lua_pop(L, nup); /* remove upvalues */ | ||
268 | } | ||
269 | |||
270 | |||
271 | |||
272 | /* | ||
273 | ** {====================================================== | ||
274 | ** getn-setn: size for arrays | ||
275 | ** ======================================================= | ||
276 | */ | ||
277 | |||
278 | #if defined(LUA_COMPAT_GETN) | ||
279 | |||
280 | static int checkint (lua_State *L, int topop) { | ||
281 | int n = (lua_type(L, -1) == LUA_TNUMBER) ? lua_tointeger(L, -1) : -1; | ||
282 | lua_pop(L, topop); | ||
283 | return n; | ||
284 | } | ||
285 | |||
286 | |||
287 | static void getsizes (lua_State *L) { | ||
288 | lua_getfield(L, LUA_REGISTRYINDEX, "LUA_SIZES"); | ||
289 | if (lua_isnil(L, -1)) { /* no `size' table? */ | ||
290 | lua_pop(L, 1); /* remove nil */ | ||
291 | lua_newtable(L); /* create it */ | ||
292 | lua_pushvalue(L, -1); /* `size' will be its own metatable */ | ||
293 | lua_setmetatable(L, -2); | ||
294 | lua_pushliteral(L, "kv"); | ||
295 | lua_setfield(L, -2, "__mode"); /* metatable(N).__mode = "kv" */ | ||
296 | lua_pushvalue(L, -1); | ||
297 | lua_setfield(L, LUA_REGISTRYINDEX, "LUA_SIZES"); /* store in register */ | ||
298 | } | ||
299 | } | ||
300 | |||
301 | |||
302 | LUALIB_API void luaL_setn (lua_State *L, int t, int n) { | ||
303 | t = abs_index(L, t); | ||
304 | lua_pushliteral(L, "n"); | ||
305 | lua_rawget(L, t); | ||
306 | if (checkint(L, 1) >= 0) { /* is there a numeric field `n'? */ | ||
307 | lua_pushliteral(L, "n"); /* use it */ | ||
308 | lua_pushinteger(L, n); | ||
309 | lua_rawset(L, t); | ||
310 | } | ||
311 | else { /* use `sizes' */ | ||
312 | getsizes(L); | ||
313 | lua_pushvalue(L, t); | ||
314 | lua_pushinteger(L, n); | ||
315 | lua_rawset(L, -3); /* sizes[t] = n */ | ||
316 | lua_pop(L, 1); /* remove `sizes' */ | ||
317 | } | ||
318 | } | ||
319 | |||
320 | |||
321 | LUALIB_API int luaL_getn (lua_State *L, int t) { | ||
322 | int n; | ||
323 | t = abs_index(L, t); | ||
324 | lua_pushliteral(L, "n"); /* try t.n */ | ||
325 | lua_rawget(L, t); | ||
326 | if ((n = checkint(L, 1)) >= 0) return n; | ||
327 | getsizes(L); /* else try sizes[t] */ | ||
328 | lua_pushvalue(L, t); | ||
329 | lua_rawget(L, -2); | ||
330 | if ((n = checkint(L, 2)) >= 0) return n; | ||
331 | return (int)lua_objlen(L, t); | ||
332 | } | ||
333 | |||
334 | #endif | ||
335 | |||
336 | /* }====================================================== */ | ||
337 | |||
338 | |||
339 | |||
340 | LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p, | ||
341 | const char *r) { | ||
342 | const char *wild; | ||
343 | size_t l = strlen(p); | ||
344 | luaL_Buffer b; | ||
345 | luaL_buffinit(L, &b); | ||
346 | while ((wild = strstr(s, p)) != NULL) { | ||
347 | luaL_addlstring(&b, s, wild - s); /* push prefix */ | ||
348 | luaL_addstring(&b, r); /* push replacement in place of pattern */ | ||
349 | s = wild + l; /* continue after `p' */ | ||
350 | } | ||
351 | luaL_addstring(&b, s); /* push last suffix */ | ||
352 | luaL_pushresult(&b); | ||
353 | return lua_tostring(L, -1); | ||
354 | } | ||
355 | |||
356 | |||
357 | LUALIB_API const char *luaL_findtable (lua_State *L, int idx, | ||
358 | const char *fname, int szhint) { | ||
359 | const char *e; | ||
360 | lua_pushvalue(L, idx); | ||
361 | do { | ||
362 | e = strchr(fname, '.'); | ||
363 | if (e == NULL) e = fname + strlen(fname); | ||
364 | lua_pushlstring(L, fname, e - fname); | ||
365 | lua_rawget(L, -2); | ||
366 | if (lua_isnil(L, -1)) { /* no such field? */ | ||
367 | lua_pop(L, 1); /* remove this nil */ | ||
368 | lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */ | ||
369 | lua_pushlstring(L, fname, e - fname); | ||
370 | lua_pushvalue(L, -2); | ||
371 | lua_settable(L, -4); /* set new table into field */ | ||
372 | } | ||
373 | else if (!lua_istable(L, -1)) { /* field has a non-table value? */ | ||
374 | lua_pop(L, 2); /* remove table and value */ | ||
375 | return fname; /* return problematic part of the name */ | ||
376 | } | ||
377 | lua_remove(L, -2); /* remove previous table */ | ||
378 | fname = e + 1; | ||
379 | } while (*e == '.'); | ||
380 | return NULL; | ||
381 | } | ||
382 | |||
383 | |||
384 | |||
385 | /* | ||
386 | ** {====================================================== | ||
387 | ** Generic Buffer manipulation | ||
388 | ** ======================================================= | ||
389 | */ | ||
390 | |||
391 | |||
392 | #define bufflen(B) ((B)->p - (B)->buffer) | ||
393 | #define bufffree(B) ((size_t)(LUAL_BUFFERSIZE - bufflen(B))) | ||
394 | |||
395 | #define LIMIT (LUA_MINSTACK/2) | ||
396 | |||
397 | |||
398 | static int emptybuffer (luaL_Buffer *B) { | ||
399 | size_t l = bufflen(B); | ||
400 | if (l == 0) return 0; /* put nothing on stack */ | ||
401 | else { | ||
402 | lua_pushlstring(B->L, B->buffer, l); | ||
403 | B->p = B->buffer; | ||
404 | B->lvl++; | ||
405 | return 1; | ||
406 | } | ||
407 | } | ||
408 | |||
409 | |||
410 | static void adjuststack (luaL_Buffer *B) { | ||
411 | if (B->lvl > 1) { | ||
412 | lua_State *L = B->L; | ||
413 | int toget = 1; /* number of levels to concat */ | ||
414 | size_t toplen = lua_strlen(L, -1); | ||
415 | do { | ||
416 | size_t l = lua_strlen(L, -(toget+1)); | ||
417 | if (B->lvl - toget + 1 >= LIMIT || toplen > l) { | ||
418 | toplen += l; | ||
419 | toget++; | ||
420 | } | ||
421 | else break; | ||
422 | } while (toget < B->lvl); | ||
423 | lua_concat(L, toget); | ||
424 | B->lvl = B->lvl - toget + 1; | ||
425 | } | ||
426 | } | ||
427 | |||
428 | |||
429 | LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) { | ||
430 | if (emptybuffer(B)) | ||
431 | adjuststack(B); | ||
432 | return B->buffer; | ||
433 | } | ||
434 | |||
435 | |||
436 | LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) { | ||
437 | while (l--) | ||
438 | luaL_addchar(B, *s++); | ||
439 | } | ||
440 | |||
441 | |||
442 | LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) { | ||
443 | luaL_addlstring(B, s, strlen(s)); | ||
444 | } | ||
445 | |||
446 | |||
447 | LUALIB_API void luaL_pushresult (luaL_Buffer *B) { | ||
448 | emptybuffer(B); | ||
449 | lua_concat(B->L, B->lvl); | ||
450 | B->lvl = 1; | ||
451 | } | ||
452 | |||
453 | |||
454 | LUALIB_API void luaL_addvalue (luaL_Buffer *B) { | ||
455 | lua_State *L = B->L; | ||
456 | size_t vl; | ||
457 | const char *s = lua_tolstring(L, -1, &vl); | ||
458 | if (vl <= bufffree(B)) { /* fit into buffer? */ | ||
459 | memcpy(B->p, s, vl); /* put it there */ | ||
460 | B->p += vl; | ||
461 | lua_pop(L, 1); /* remove from stack */ | ||
462 | } | ||
463 | else { | ||
464 | if (emptybuffer(B)) | ||
465 | lua_insert(L, -2); /* put buffer before new value */ | ||
466 | B->lvl++; /* add new value into B stack */ | ||
467 | adjuststack(B); | ||
468 | } | ||
469 | } | ||
470 | |||
471 | |||
472 | LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) { | ||
473 | B->L = L; | ||
474 | B->p = B->buffer; | ||
475 | B->lvl = 0; | ||
476 | } | ||
477 | |||
478 | /* }====================================================== */ | ||
479 | |||
480 | |||
481 | LUALIB_API int luaL_ref (lua_State *L, int t) { | ||
482 | int ref; | ||
483 | t = abs_index(L, t); | ||
484 | if (lua_isnil(L, -1)) { | ||
485 | lua_pop(L, 1); /* remove from stack */ | ||
486 | return LUA_REFNIL; /* `nil' has a unique fixed reference */ | ||
487 | } | ||
488 | lua_rawgeti(L, t, FREELIST_REF); /* get first free element */ | ||
489 | ref = (int)lua_tointeger(L, -1); /* ref = t[FREELIST_REF] */ | ||
490 | lua_pop(L, 1); /* remove it from stack */ | ||
491 | if (ref != 0) { /* any free element? */ | ||
492 | lua_rawgeti(L, t, ref); /* remove it from list */ | ||
493 | lua_rawseti(L, t, FREELIST_REF); /* (t[FREELIST_REF] = t[ref]) */ | ||
494 | } | ||
495 | else { /* no free elements */ | ||
496 | ref = (int)lua_objlen(L, t); | ||
497 | ref++; /* create new reference */ | ||
498 | } | ||
499 | lua_rawseti(L, t, ref); | ||
500 | return ref; | ||
501 | } | ||
502 | |||
503 | |||
504 | LUALIB_API void luaL_unref (lua_State *L, int t, int ref) { | ||
505 | if (ref >= 0) { | ||
506 | t = abs_index(L, t); | ||
507 | lua_rawgeti(L, t, FREELIST_REF); | ||
508 | lua_rawseti(L, t, ref); /* t[ref] = t[FREELIST_REF] */ | ||
509 | lua_pushinteger(L, ref); | ||
510 | lua_rawseti(L, t, FREELIST_REF); /* t[FREELIST_REF] = ref */ | ||
511 | } | ||
512 | } | ||
513 | |||
514 | |||
515 | |||
516 | /* | ||
517 | ** {====================================================== | ||
518 | ** Load functions | ||
519 | ** ======================================================= | ||
520 | */ | ||
521 | |||
522 | typedef struct LoadF { | ||
523 | int extraline; | ||
524 | int f; | ||
525 | char buff[LUAL_BUFFERSIZE]; | ||
526 | } LoadF; | ||
527 | |||
528 | static const char *getF(lua_State *L, void *ud, size_t *size) { | ||
529 | LoadF *lf = (LoadF *)ud; | ||
530 | (void)L; | ||
531 | if (lf->extraline) { | ||
532 | lf->extraline = 0; | ||
533 | *size = 1; | ||
534 | return "\n"; | ||
535 | } | ||
536 | *size = rb->read(lf->f, lf->buff, LUAL_BUFFERSIZE); | ||
537 | if (*size <= 0) return NULL; | ||
538 | return (*size > 0) ? lf->buff : NULL; | ||
539 | } | ||
540 | |||
541 | |||
542 | static int errfile (lua_State *L, const char *what, int fnameindex) { | ||
543 | const char *serr = strerror(errno); | ||
544 | const char *filename = lua_tostring(L, fnameindex) + 1; | ||
545 | lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr); | ||
546 | lua_remove(L, fnameindex); | ||
547 | return LUA_ERRFILE; | ||
548 | } | ||
549 | |||
550 | |||
551 | LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) { | ||
552 | LoadF lf; | ||
553 | int status; //, readstatus; | ||
554 | char buffer[MAX_PATH]; | ||
555 | // int c; | ||
556 | int fnameindex = lua_gettop(L) + 1; /* index of filename on the stack */ | ||
557 | lf.extraline = 0; | ||
558 | // if (filename == NULL) { | ||
559 | // lua_pushliteral(L, "=stdin"); | ||
560 | // lf.f = stdin; | ||
561 | // } | ||
562 | // else { | ||
563 | lua_pushfstring(L, "@%s", filename); | ||
564 | lf.f = rb->open(filename, O_RDONLY); | ||
565 | if (lf.f < 0) | ||
566 | { | ||
567 | /* Fallback */ | ||
568 | snprintf(buffer, sizeof(buffer), "%s/%s", curpath, filename); | ||
569 | lf.f = rb->open(buffer, O_RDONLY); | ||
570 | |||
571 | if(lf.f < 0) | ||
572 | { | ||
573 | snprintf(buffer, sizeof(buffer), "%s/%s", VIEWERS_DIR, filename); | ||
574 | lf.f = rb->open(buffer, O_RDONLY); | ||
575 | |||
576 | if(lf.f < 0) | ||
577 | return errfile(L, "open", fnameindex); | ||
578 | } | ||
579 | } | ||
580 | // } | ||
581 | // c = getc(lf.f); | ||
582 | // if (c == '#') { /* Unix exec. file? */ | ||
583 | // lf.extraline = 1; | ||
584 | // while ((c = getc(lf.f)) != EOF && c != '\n') ; /* skip first line */ | ||
585 | // if (c == '\n') c = getc(lf.f); | ||
586 | // } | ||
587 | // if (c == LUA_SIGNATURE[0]) { // && lf.f != stdin) { /* binary file? */ | ||
588 | // rb->close(lf.f); | ||
589 | // lf.f = rb->open(filename, O_RDONLY); /* reopen in binary mode */ | ||
590 | // if (lf.f < 0) return errfile(L, "reopen", fnameindex); | ||
591 | /* skip eventual `#!...' */ | ||
592 | // while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ; | ||
593 | // lf.extraline = 0; | ||
594 | // } | ||
595 | // ungetc(c, lf.f); | ||
596 | status = lua_load(L, getF, &lf, lua_tostring(L, -1)); | ||
597 | // readstatus = ferror(lf.f); | ||
598 | //if (lf.f != stdin) rb->close(lf.f); /* close file (even in case of errors) */ | ||
599 | rb->close(lf.f); | ||
600 | // if (readstatus) { | ||
601 | // lua_settop(L, fnameindex); /* ignore results from `lua_load' */ | ||
602 | // return errfile(L, "read", fnameindex); | ||
603 | // } | ||
604 | lua_remove(L, fnameindex); | ||
605 | return status; | ||
606 | } | ||
607 | |||
608 | |||
609 | typedef struct LoadS { | ||
610 | const char *s; | ||
611 | size_t size; | ||
612 | } LoadS; | ||
613 | |||
614 | |||
615 | static const char *getS (lua_State *L, void *ud, size_t *size) { | ||
616 | LoadS *ls = (LoadS *)ud; | ||
617 | (void)L; | ||
618 | if (ls->size == 0) return NULL; | ||
619 | *size = ls->size; | ||
620 | ls->size = 0; | ||
621 | return ls->s; | ||
622 | } | ||
623 | |||
624 | |||
625 | LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size, | ||
626 | const char *name) { | ||
627 | LoadS ls; | ||
628 | ls.s = buff; | ||
629 | ls.size = size; | ||
630 | return lua_load(L, getS, &ls, name); | ||
631 | } | ||
632 | |||
633 | |||
634 | LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s) { | ||
635 | return luaL_loadbuffer(L, s, strlen(s), s); | ||
636 | } | ||
637 | |||
638 | |||
639 | |||
640 | /* }====================================================== */ | ||
641 | |||
642 | |||
643 | static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { | ||
644 | (void)ud; | ||
645 | (void)osize; | ||
646 | if (nsize == 0) { | ||
647 | free(ptr); | ||
648 | return NULL; | ||
649 | } | ||
650 | else | ||
651 | return realloc(ptr, nsize); | ||
652 | } | ||
653 | |||
654 | |||
655 | static int panic (lua_State *L) { | ||
656 | (void)L; /* to avoid warnings */ | ||
657 | DEBUGF("PANIC: unprotected error in call to Lua API (%s)\n", | ||
658 | lua_tostring(L, -1)); | ||
659 | |||
660 | return 0; | ||
661 | } | ||
662 | |||
663 | |||
664 | LUALIB_API lua_State *luaL_newstate (void) { | ||
665 | lua_State *L = lua_newstate(l_alloc, NULL); | ||
666 | if (L) lua_atpanic(L, &panic); | ||
667 | return L; | ||
668 | } | ||
669 | |||
diff --git a/apps/plugins/lua/lauxlib.h b/apps/plugins/lua/lauxlib.h new file mode 100644 index 0000000000..d58f290527 --- /dev/null +++ b/apps/plugins/lua/lauxlib.h | |||
@@ -0,0 +1,174 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Auxiliary functions for building Lua libraries | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #ifndef lauxlib_h | ||
9 | #define lauxlib_h | ||
10 | |||
11 | |||
12 | #include <stddef.h> | ||
13 | #include <stdio.h> | ||
14 | |||
15 | #include "lua.h" | ||
16 | |||
17 | |||
18 | #if defined(LUA_COMPAT_GETN) | ||
19 | LUALIB_API int (luaL_getn) (lua_State *L, int t); | ||
20 | LUALIB_API void (luaL_setn) (lua_State *L, int t, int n); | ||
21 | #else | ||
22 | #define luaL_getn(L,i) ((int)lua_objlen(L, i)) | ||
23 | #define luaL_setn(L,i,j) ((void)0) /* no op! */ | ||
24 | #endif | ||
25 | |||
26 | #if defined(LUA_COMPAT_OPENLIB) | ||
27 | #define luaI_openlib luaL_openlib | ||
28 | #endif | ||
29 | |||
30 | |||
31 | /* extra error code for `luaL_load' */ | ||
32 | #define LUA_ERRFILE (LUA_ERRERR+1) | ||
33 | |||
34 | |||
35 | typedef struct luaL_Reg { | ||
36 | const char *name; | ||
37 | lua_CFunction func; | ||
38 | } luaL_Reg; | ||
39 | |||
40 | |||
41 | |||
42 | LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname, | ||
43 | const luaL_Reg *l, int nup); | ||
44 | LUALIB_API void (luaL_register) (lua_State *L, const char *libname, | ||
45 | const luaL_Reg *l); | ||
46 | LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e); | ||
47 | LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e); | ||
48 | LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname); | ||
49 | LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg); | ||
50 | LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg, | ||
51 | size_t *l); | ||
52 | LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg, | ||
53 | const char *def, size_t *l); | ||
54 | LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg); | ||
55 | LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def); | ||
56 | |||
57 | LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg); | ||
58 | LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg, | ||
59 | lua_Integer def); | ||
60 | |||
61 | LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg); | ||
62 | LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t); | ||
63 | LUALIB_API void (luaL_checkany) (lua_State *L, int narg); | ||
64 | |||
65 | LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); | ||
66 | LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname); | ||
67 | |||
68 | LUALIB_API void (luaL_where) (lua_State *L, int lvl); | ||
69 | LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...); | ||
70 | |||
71 | LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def, | ||
72 | const char *const lst[]); | ||
73 | |||
74 | LUALIB_API int (luaL_ref) (lua_State *L, int t); | ||
75 | LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref); | ||
76 | |||
77 | LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename); | ||
78 | LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz, | ||
79 | const char *name); | ||
80 | LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); | ||
81 | |||
82 | LUALIB_API lua_State *(luaL_newstate) (void); | ||
83 | |||
84 | |||
85 | LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p, | ||
86 | const char *r); | ||
87 | |||
88 | LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx, | ||
89 | const char *fname, int szhint); | ||
90 | |||
91 | |||
92 | |||
93 | |||
94 | /* | ||
95 | ** =============================================================== | ||
96 | ** some useful macros | ||
97 | ** =============================================================== | ||
98 | */ | ||
99 | |||
100 | #define luaL_argcheck(L, cond,numarg,extramsg) \ | ||
101 | ((void)((cond) || luaL_argerror(L, (numarg), (extramsg)))) | ||
102 | #define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL)) | ||
103 | #define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL)) | ||
104 | #define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n))) | ||
105 | #define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d))) | ||
106 | #define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n))) | ||
107 | #define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d))) | ||
108 | |||
109 | #define luaL_typename(L,i) lua_typename(L, lua_type(L,(i))) | ||
110 | |||
111 | #define luaL_dofile(L, fn) \ | ||
112 | (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0)) | ||
113 | |||
114 | #define luaL_dostring(L, s) \ | ||
115 | (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0)) | ||
116 | |||
117 | #define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n))) | ||
118 | |||
119 | #define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n))) | ||
120 | |||
121 | /* | ||
122 | ** {====================================================== | ||
123 | ** Generic Buffer manipulation | ||
124 | ** ======================================================= | ||
125 | */ | ||
126 | |||
127 | |||
128 | |||
129 | typedef struct luaL_Buffer { | ||
130 | char *p; /* current position in buffer */ | ||
131 | int lvl; /* number of strings in the stack (level) */ | ||
132 | lua_State *L; | ||
133 | char buffer[LUAL_BUFFERSIZE]; | ||
134 | } luaL_Buffer; | ||
135 | |||
136 | #define luaL_addchar(B,c) \ | ||
137 | ((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \ | ||
138 | (*(B)->p++ = (char)(c))) | ||
139 | |||
140 | /* compatibility only */ | ||
141 | #define luaL_putchar(B,c) luaL_addchar(B,c) | ||
142 | |||
143 | #define luaL_addsize(B,n) ((B)->p += (n)) | ||
144 | |||
145 | LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B); | ||
146 | LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B); | ||
147 | LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l); | ||
148 | LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s); | ||
149 | LUALIB_API void (luaL_addvalue) (luaL_Buffer *B); | ||
150 | LUALIB_API void (luaL_pushresult) (luaL_Buffer *B); | ||
151 | |||
152 | |||
153 | /* }====================================================== */ | ||
154 | |||
155 | |||
156 | /* compatibility with ref system */ | ||
157 | |||
158 | /* pre-defined references */ | ||
159 | #define LUA_NOREF (-2) | ||
160 | #define LUA_REFNIL (-1) | ||
161 | |||
162 | #define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \ | ||
163 | (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0)) | ||
164 | |||
165 | #define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref)) | ||
166 | |||
167 | #define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref)) | ||
168 | |||
169 | |||
170 | #define luaL_reg luaL_Reg | ||
171 | |||
172 | #endif | ||
173 | |||
174 | |||
diff --git a/apps/plugins/lua/lbaselib.c b/apps/plugins/lua/lbaselib.c new file mode 100644 index 0000000000..008e3629fe --- /dev/null +++ b/apps/plugins/lua/lbaselib.c | |||
@@ -0,0 +1,657 @@ | |||
1 | /* | ||
2 | ** $Id: lbaselib.c,v 1.191.1.6 2008/02/14 16:46:22 roberto Exp $ | ||
3 | ** Basic library | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | |||
9 | #include <ctype.h> | ||
10 | #include <stdio.h> | ||
11 | #include <stdlib.h> | ||
12 | #include <string.h> | ||
13 | |||
14 | #define lbaselib_c | ||
15 | #define LUA_LIB | ||
16 | |||
17 | #include "lua.h" | ||
18 | |||
19 | #include "lauxlib.h" | ||
20 | #include "lualib.h" | ||
21 | |||
22 | |||
23 | |||
24 | |||
25 | /* | ||
26 | ** If your system does not support `stdout', you can just remove this function. | ||
27 | ** If you need, you can define your own `print' function, following this | ||
28 | ** model but changing `fputs' to put the strings at a proper place | ||
29 | ** (a console window or a log file, for instance). | ||
30 | */ | ||
31 | #if 0 | ||
32 | static int luaB_print (lua_State *L) { | ||
33 | int n = lua_gettop(L); /* number of arguments */ | ||
34 | int i; | ||
35 | lua_getglobal(L, "tostring"); | ||
36 | for (i=1; i<=n; i++) { | ||
37 | const char *s; | ||
38 | lua_pushvalue(L, -1); /* function to be called */ | ||
39 | lua_pushvalue(L, i); /* value to print */ | ||
40 | lua_call(L, 1, 1); | ||
41 | s = lua_tostring(L, -1); /* get result */ | ||
42 | if (s == NULL) | ||
43 | return luaL_error(L, LUA_QL("tostring") " must return a string to " | ||
44 | LUA_QL("print")); | ||
45 | if (i>1) fputs("\t", stdout); | ||
46 | fputs(s, stdout); | ||
47 | lua_pop(L, 1); /* pop result */ | ||
48 | } | ||
49 | fputs("\n", stdout); | ||
50 | return 0; | ||
51 | } | ||
52 | #endif | ||
53 | |||
54 | |||
55 | static int luaB_tonumber (lua_State *L) { | ||
56 | int base = luaL_optint(L, 2, 10); | ||
57 | if (base == 10) { /* standard conversion */ | ||
58 | luaL_checkany(L, 1); | ||
59 | if (lua_isnumber(L, 1)) { | ||
60 | lua_pushnumber(L, lua_tonumber(L, 1)); | ||
61 | return 1; | ||
62 | } | ||
63 | } | ||
64 | else { | ||
65 | const char *s1 = luaL_checkstring(L, 1); | ||
66 | char *s2; | ||
67 | unsigned long n; | ||
68 | luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range"); | ||
69 | n = strtoul(s1, &s2, base); | ||
70 | if (s1 != s2) { /* at least one valid digit? */ | ||
71 | while (isspace((unsigned char)(*s2))) s2++; /* skip trailing spaces */ | ||
72 | if (*s2 == '\0') { /* no invalid trailing characters? */ | ||
73 | lua_pushnumber(L, (lua_Number)n); | ||
74 | return 1; | ||
75 | } | ||
76 | } | ||
77 | } | ||
78 | lua_pushnil(L); /* else not a number */ | ||
79 | return 1; | ||
80 | } | ||
81 | |||
82 | |||
83 | static int luaB_error (lua_State *L) { | ||
84 | int level = luaL_optint(L, 2, 1); | ||
85 | lua_settop(L, 1); | ||
86 | if (lua_isstring(L, 1) && level > 0) { /* add extra information? */ | ||
87 | luaL_where(L, level); | ||
88 | lua_pushvalue(L, 1); | ||
89 | lua_concat(L, 2); | ||
90 | } | ||
91 | return lua_error(L); | ||
92 | } | ||
93 | |||
94 | |||
95 | static int luaB_getmetatable (lua_State *L) { | ||
96 | luaL_checkany(L, 1); | ||
97 | if (!lua_getmetatable(L, 1)) { | ||
98 | lua_pushnil(L); | ||
99 | return 1; /* no metatable */ | ||
100 | } | ||
101 | luaL_getmetafield(L, 1, "__metatable"); | ||
102 | return 1; /* returns either __metatable field (if present) or metatable */ | ||
103 | } | ||
104 | |||
105 | |||
106 | static int luaB_setmetatable (lua_State *L) { | ||
107 | int t = lua_type(L, 2); | ||
108 | luaL_checktype(L, 1, LUA_TTABLE); | ||
109 | luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2, | ||
110 | "nil or table expected"); | ||
111 | if (luaL_getmetafield(L, 1, "__metatable")) | ||
112 | luaL_error(L, "cannot change a protected metatable"); | ||
113 | lua_settop(L, 2); | ||
114 | lua_setmetatable(L, 1); | ||
115 | return 1; | ||
116 | } | ||
117 | |||
118 | |||
119 | static void getfunc (lua_State *L, int opt) { | ||
120 | if (lua_isfunction(L, 1)) lua_pushvalue(L, 1); | ||
121 | else { | ||
122 | lua_Debug ar; | ||
123 | int level = opt ? luaL_optint(L, 1, 1) : luaL_checkint(L, 1); | ||
124 | luaL_argcheck(L, level >= 0, 1, "level must be non-negative"); | ||
125 | if (lua_getstack(L, level, &ar) == 0) | ||
126 | luaL_argerror(L, 1, "invalid level"); | ||
127 | lua_getinfo(L, "f", &ar); | ||
128 | if (lua_isnil(L, -1)) | ||
129 | luaL_error(L, "no function environment for tail call at level %d", | ||
130 | level); | ||
131 | } | ||
132 | } | ||
133 | |||
134 | |||
135 | static int luaB_getfenv (lua_State *L) { | ||
136 | getfunc(L, 1); | ||
137 | if (lua_iscfunction(L, -1)) /* is a C function? */ | ||
138 | lua_pushvalue(L, LUA_GLOBALSINDEX); /* return the thread's global env. */ | ||
139 | else | ||
140 | lua_getfenv(L, -1); | ||
141 | return 1; | ||
142 | } | ||
143 | |||
144 | |||
145 | static int luaB_setfenv (lua_State *L) { | ||
146 | luaL_checktype(L, 2, LUA_TTABLE); | ||
147 | getfunc(L, 0); | ||
148 | lua_pushvalue(L, 2); | ||
149 | if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) { | ||
150 | /* change environment of current thread */ | ||
151 | lua_pushthread(L); | ||
152 | lua_insert(L, -2); | ||
153 | lua_setfenv(L, -2); | ||
154 | return 0; | ||
155 | } | ||
156 | else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0) | ||
157 | luaL_error(L, | ||
158 | LUA_QL("setfenv") " cannot change environment of given object"); | ||
159 | return 1; | ||
160 | } | ||
161 | |||
162 | |||
163 | static int luaB_rawequal (lua_State *L) { | ||
164 | luaL_checkany(L, 1); | ||
165 | luaL_checkany(L, 2); | ||
166 | lua_pushboolean(L, lua_rawequal(L, 1, 2)); | ||
167 | return 1; | ||
168 | } | ||
169 | |||
170 | |||
171 | static int luaB_rawget (lua_State *L) { | ||
172 | luaL_checktype(L, 1, LUA_TTABLE); | ||
173 | luaL_checkany(L, 2); | ||
174 | lua_settop(L, 2); | ||
175 | lua_rawget(L, 1); | ||
176 | return 1; | ||
177 | } | ||
178 | |||
179 | static int luaB_rawset (lua_State *L) { | ||
180 | luaL_checktype(L, 1, LUA_TTABLE); | ||
181 | luaL_checkany(L, 2); | ||
182 | luaL_checkany(L, 3); | ||
183 | lua_settop(L, 3); | ||
184 | lua_rawset(L, 1); | ||
185 | return 1; | ||
186 | } | ||
187 | |||
188 | |||
189 | static int luaB_gcinfo (lua_State *L) { | ||
190 | lua_pushinteger(L, lua_getgccount(L)); | ||
191 | return 1; | ||
192 | } | ||
193 | |||
194 | |||
195 | static int luaB_collectgarbage (lua_State *L) { | ||
196 | static const char *const opts[] = {"stop", "restart", "collect", | ||
197 | "count", "step", "setpause", "setstepmul", NULL}; | ||
198 | static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT, | ||
199 | LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL}; | ||
200 | int o = luaL_checkoption(L, 1, "collect", opts); | ||
201 | int ex = luaL_optint(L, 2, 0); | ||
202 | int res = lua_gc(L, optsnum[o], ex); | ||
203 | switch (optsnum[o]) { | ||
204 | case LUA_GCCOUNT: { | ||
205 | int b = lua_gc(L, LUA_GCCOUNTB, 0); | ||
206 | lua_pushnumber(L, res + ((lua_Number)b/1024)); | ||
207 | return 1; | ||
208 | } | ||
209 | case LUA_GCSTEP: { | ||
210 | lua_pushboolean(L, res); | ||
211 | return 1; | ||
212 | } | ||
213 | default: { | ||
214 | lua_pushnumber(L, res); | ||
215 | return 1; | ||
216 | } | ||
217 | } | ||
218 | } | ||
219 | |||
220 | |||
221 | static int luaB_type (lua_State *L) { | ||
222 | luaL_checkany(L, 1); | ||
223 | lua_pushstring(L, luaL_typename(L, 1)); | ||
224 | return 1; | ||
225 | } | ||
226 | |||
227 | |||
228 | static int luaB_next (lua_State *L) { | ||
229 | luaL_checktype(L, 1, LUA_TTABLE); | ||
230 | lua_settop(L, 2); /* create a 2nd argument if there isn't one */ | ||
231 | if (lua_next(L, 1)) | ||
232 | return 2; | ||
233 | else { | ||
234 | lua_pushnil(L); | ||
235 | return 1; | ||
236 | } | ||
237 | } | ||
238 | |||
239 | |||
240 | static int luaB_pairs (lua_State *L) { | ||
241 | luaL_checktype(L, 1, LUA_TTABLE); | ||
242 | lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */ | ||
243 | lua_pushvalue(L, 1); /* state, */ | ||
244 | lua_pushnil(L); /* and initial value */ | ||
245 | return 3; | ||
246 | } | ||
247 | |||
248 | |||
249 | static int ipairsaux (lua_State *L) { | ||
250 | int i = luaL_checkint(L, 2); | ||
251 | luaL_checktype(L, 1, LUA_TTABLE); | ||
252 | i++; /* next value */ | ||
253 | lua_pushinteger(L, i); | ||
254 | lua_rawgeti(L, 1, i); | ||
255 | return (lua_isnil(L, -1)) ? 0 : 2; | ||
256 | } | ||
257 | |||
258 | |||
259 | static int luaB_ipairs (lua_State *L) { | ||
260 | luaL_checktype(L, 1, LUA_TTABLE); | ||
261 | lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */ | ||
262 | lua_pushvalue(L, 1); /* state, */ | ||
263 | lua_pushinteger(L, 0); /* and initial value */ | ||
264 | return 3; | ||
265 | } | ||
266 | |||
267 | |||
268 | static int load_aux (lua_State *L, int status) { | ||
269 | if (status == 0) /* OK? */ | ||
270 | return 1; | ||
271 | else { | ||
272 | lua_pushnil(L); | ||
273 | lua_insert(L, -2); /* put before error message */ | ||
274 | return 2; /* return nil plus error message */ | ||
275 | } | ||
276 | } | ||
277 | |||
278 | |||
279 | static int luaB_loadstring (lua_State *L) { | ||
280 | size_t l; | ||
281 | const char *s = luaL_checklstring(L, 1, &l); | ||
282 | const char *chunkname = luaL_optstring(L, 2, s); | ||
283 | return load_aux(L, luaL_loadbuffer(L, s, l, chunkname)); | ||
284 | } | ||
285 | |||
286 | |||
287 | static int luaB_loadfile (lua_State *L) { | ||
288 | const char *fname = luaL_optstring(L, 1, NULL); | ||
289 | return load_aux(L, luaL_loadfile(L, fname)); | ||
290 | } | ||
291 | |||
292 | |||
293 | /* | ||
294 | ** Reader for generic `load' function: `lua_load' uses the | ||
295 | ** stack for internal stuff, so the reader cannot change the | ||
296 | ** stack top. Instead, it keeps its resulting string in a | ||
297 | ** reserved slot inside the stack. | ||
298 | */ | ||
299 | static const char *generic_reader (lua_State *L, void *ud, size_t *size) { | ||
300 | (void)ud; /* to avoid warnings */ | ||
301 | luaL_checkstack(L, 2, "too many nested functions"); | ||
302 | lua_pushvalue(L, 1); /* get function */ | ||
303 | lua_call(L, 0, 1); /* call it */ | ||
304 | if (lua_isnil(L, -1)) { | ||
305 | *size = 0; | ||
306 | return NULL; | ||
307 | } | ||
308 | else if (lua_isstring(L, -1)) { | ||
309 | lua_replace(L, 3); /* save string in a reserved stack slot */ | ||
310 | return lua_tolstring(L, 3, size); | ||
311 | } | ||
312 | else luaL_error(L, "reader function must return a string"); | ||
313 | return NULL; /* to avoid warnings */ | ||
314 | } | ||
315 | |||
316 | |||
317 | static int luaB_load (lua_State *L) { | ||
318 | int status; | ||
319 | const char *cname = luaL_optstring(L, 2, "=(load)"); | ||
320 | luaL_checktype(L, 1, LUA_TFUNCTION); | ||
321 | lua_settop(L, 3); /* function, eventual name, plus one reserved slot */ | ||
322 | status = lua_load(L, generic_reader, NULL, cname); | ||
323 | return load_aux(L, status); | ||
324 | } | ||
325 | |||
326 | |||
327 | static int luaB_dofile (lua_State *L) { | ||
328 | const char *fname = luaL_optstring(L, 1, NULL); | ||
329 | int n = lua_gettop(L); | ||
330 | if (luaL_loadfile(L, fname) != 0) lua_error(L); | ||
331 | lua_call(L, 0, LUA_MULTRET); | ||
332 | return lua_gettop(L) - n; | ||
333 | } | ||
334 | |||
335 | |||
336 | static int luaB_assert (lua_State *L) { | ||
337 | luaL_checkany(L, 1); | ||
338 | if (!lua_toboolean(L, 1)) | ||
339 | return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!")); | ||
340 | return lua_gettop(L); | ||
341 | } | ||
342 | |||
343 | |||
344 | static int luaB_unpack (lua_State *L) { | ||
345 | int i, e, n; | ||
346 | luaL_checktype(L, 1, LUA_TTABLE); | ||
347 | i = luaL_optint(L, 2, 1); | ||
348 | e = luaL_opt(L, luaL_checkint, 3, luaL_getn(L, 1)); | ||
349 | if (i > e) return 0; /* empty range */ | ||
350 | n = e - i + 1; /* number of elements */ | ||
351 | if (n <= 0 || !lua_checkstack(L, n)) /* n <= 0 means arith. overflow */ | ||
352 | return luaL_error(L, "too many results to unpack"); | ||
353 | lua_rawgeti(L, 1, i); /* push arg[i] (avoiding overflow problems) */ | ||
354 | while (i++ < e) /* push arg[i + 1...e] */ | ||
355 | lua_rawgeti(L, 1, i); | ||
356 | return n; | ||
357 | } | ||
358 | |||
359 | |||
360 | static int luaB_select (lua_State *L) { | ||
361 | int n = lua_gettop(L); | ||
362 | if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') { | ||
363 | lua_pushinteger(L, n-1); | ||
364 | return 1; | ||
365 | } | ||
366 | else { | ||
367 | int i = luaL_checkint(L, 1); | ||
368 | if (i < 0) i = n + i; | ||
369 | else if (i > n) i = n; | ||
370 | luaL_argcheck(L, 1 <= i, 1, "index out of range"); | ||
371 | return n - i; | ||
372 | } | ||
373 | } | ||
374 | |||
375 | |||
376 | static int luaB_pcall (lua_State *L) { | ||
377 | int status; | ||
378 | luaL_checkany(L, 1); | ||
379 | status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0); | ||
380 | lua_pushboolean(L, (status == 0)); | ||
381 | lua_insert(L, 1); | ||
382 | return lua_gettop(L); /* return status + all results */ | ||
383 | } | ||
384 | |||
385 | |||
386 | static int luaB_xpcall (lua_State *L) { | ||
387 | int status; | ||
388 | luaL_checkany(L, 2); | ||
389 | lua_settop(L, 2); | ||
390 | lua_insert(L, 1); /* put error function under function to be called */ | ||
391 | status = lua_pcall(L, 0, LUA_MULTRET, 1); | ||
392 | lua_pushboolean(L, (status == 0)); | ||
393 | lua_replace(L, 1); | ||
394 | return lua_gettop(L); /* return status + all results */ | ||
395 | } | ||
396 | |||
397 | |||
398 | static int luaB_tostring (lua_State *L) { | ||
399 | luaL_checkany(L, 1); | ||
400 | if (luaL_callmeta(L, 1, "__tostring")) /* is there a metafield? */ | ||
401 | return 1; /* use its value */ | ||
402 | switch (lua_type(L, 1)) { | ||
403 | case LUA_TNUMBER: | ||
404 | lua_pushstring(L, lua_tostring(L, 1)); | ||
405 | break; | ||
406 | case LUA_TSTRING: | ||
407 | lua_pushvalue(L, 1); | ||
408 | break; | ||
409 | case LUA_TBOOLEAN: | ||
410 | lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false")); | ||
411 | break; | ||
412 | case LUA_TNIL: | ||
413 | lua_pushliteral(L, "nil"); | ||
414 | break; | ||
415 | default: | ||
416 | lua_pushfstring(L, "%s: %p", luaL_typename(L, 1), lua_topointer(L, 1)); | ||
417 | break; | ||
418 | } | ||
419 | return 1; | ||
420 | } | ||
421 | |||
422 | |||
423 | static int luaB_newproxy (lua_State *L) { | ||
424 | lua_settop(L, 1); | ||
425 | lua_newuserdata(L, 0); /* create proxy */ | ||
426 | if (lua_toboolean(L, 1) == 0) | ||
427 | return 1; /* no metatable */ | ||
428 | else if (lua_isboolean(L, 1)) { | ||
429 | lua_newtable(L); /* create a new metatable `m' ... */ | ||
430 | lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */ | ||
431 | lua_pushboolean(L, 1); | ||
432 | lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */ | ||
433 | } | ||
434 | else { | ||
435 | int validproxy = 0; /* to check if weaktable[metatable(u)] == true */ | ||
436 | if (lua_getmetatable(L, 1)) { | ||
437 | lua_rawget(L, lua_upvalueindex(1)); | ||
438 | validproxy = lua_toboolean(L, -1); | ||
439 | lua_pop(L, 1); /* remove value */ | ||
440 | } | ||
441 | luaL_argcheck(L, validproxy, 1, "boolean or proxy expected"); | ||
442 | lua_getmetatable(L, 1); /* metatable is valid; get it */ | ||
443 | } | ||
444 | lua_setmetatable(L, 2); | ||
445 | return 1; | ||
446 | } | ||
447 | |||
448 | |||
449 | static const luaL_Reg base_funcs[] = { | ||
450 | {"assert", luaB_assert}, | ||
451 | {"collectgarbage", luaB_collectgarbage}, | ||
452 | {"dofile", luaB_dofile}, | ||
453 | {"error", luaB_error}, | ||
454 | {"gcinfo", luaB_gcinfo}, | ||
455 | {"getfenv", luaB_getfenv}, | ||
456 | {"getmetatable", luaB_getmetatable}, | ||
457 | {"loadfile", luaB_loadfile}, | ||
458 | {"load", luaB_load}, | ||
459 | {"loadstring", luaB_loadstring}, | ||
460 | {"next", luaB_next}, | ||
461 | {"pcall", luaB_pcall}, | ||
462 | #if 0 | ||
463 | {"print", luaB_print}, | ||
464 | #endif | ||
465 | {"rawequal", luaB_rawequal}, | ||
466 | {"rawget", luaB_rawget}, | ||
467 | {"rawset", luaB_rawset}, | ||
468 | {"select", luaB_select}, | ||
469 | {"setfenv", luaB_setfenv}, | ||
470 | {"setmetatable", luaB_setmetatable}, | ||
471 | {"tonumber", luaB_tonumber}, | ||
472 | {"tostring", luaB_tostring}, | ||
473 | {"type", luaB_type}, | ||
474 | {"unpack", luaB_unpack}, | ||
475 | {"xpcall", luaB_xpcall}, | ||
476 | {NULL, NULL} | ||
477 | }; | ||
478 | |||
479 | |||
480 | /* | ||
481 | ** {====================================================== | ||
482 | ** Coroutine library | ||
483 | ** ======================================================= | ||
484 | */ | ||
485 | |||
486 | #define CO_RUN 0 /* running */ | ||
487 | #define CO_SUS 1 /* suspended */ | ||
488 | #define CO_NOR 2 /* 'normal' (it resumed another coroutine) */ | ||
489 | #define CO_DEAD 3 | ||
490 | |||
491 | static const char *const statnames[] = | ||
492 | {"running", "suspended", "normal", "dead"}; | ||
493 | |||
494 | static int costatus (lua_State *L, lua_State *co) { | ||
495 | if (L == co) return CO_RUN; | ||
496 | switch (lua_status(co)) { | ||
497 | case LUA_YIELD: | ||
498 | return CO_SUS; | ||
499 | case 0: { | ||
500 | lua_Debug ar; | ||
501 | if (lua_getstack(co, 0, &ar) > 0) /* does it have frames? */ | ||
502 | return CO_NOR; /* it is running */ | ||
503 | else if (lua_gettop(co) == 0) | ||
504 | return CO_DEAD; | ||
505 | else | ||
506 | return CO_SUS; /* initial state */ | ||
507 | } | ||
508 | default: /* some error occured */ | ||
509 | return CO_DEAD; | ||
510 | } | ||
511 | } | ||
512 | |||
513 | |||
514 | static int luaB_costatus (lua_State *L) { | ||
515 | lua_State *co = lua_tothread(L, 1); | ||
516 | luaL_argcheck(L, co, 1, "coroutine expected"); | ||
517 | lua_pushstring(L, statnames[costatus(L, co)]); | ||
518 | return 1; | ||
519 | } | ||
520 | |||
521 | |||
522 | static int auxresume (lua_State *L, lua_State *co, int narg) { | ||
523 | int status = costatus(L, co); | ||
524 | if (!lua_checkstack(co, narg)) | ||
525 | luaL_error(L, "too many arguments to resume"); | ||
526 | if (status != CO_SUS) { | ||
527 | lua_pushfstring(L, "cannot resume %s coroutine", statnames[status]); | ||
528 | return -1; /* error flag */ | ||
529 | } | ||
530 | lua_xmove(L, co, narg); | ||
531 | lua_setlevel(L, co); | ||
532 | status = lua_resume(co, narg); | ||
533 | if (status == 0 || status == LUA_YIELD) { | ||
534 | int nres = lua_gettop(co); | ||
535 | if (!lua_checkstack(L, nres + 1)) | ||
536 | luaL_error(L, "too many results to resume"); | ||
537 | lua_xmove(co, L, nres); /* move yielded values */ | ||
538 | return nres; | ||
539 | } | ||
540 | else { | ||
541 | lua_xmove(co, L, 1); /* move error message */ | ||
542 | return -1; /* error flag */ | ||
543 | } | ||
544 | } | ||
545 | |||
546 | |||
547 | static int luaB_coresume (lua_State *L) { | ||
548 | lua_State *co = lua_tothread(L, 1); | ||
549 | int r; | ||
550 | luaL_argcheck(L, co, 1, "coroutine expected"); | ||
551 | r = auxresume(L, co, lua_gettop(L) - 1); | ||
552 | if (r < 0) { | ||
553 | lua_pushboolean(L, 0); | ||
554 | lua_insert(L, -2); | ||
555 | return 2; /* return false + error message */ | ||
556 | } | ||
557 | else { | ||
558 | lua_pushboolean(L, 1); | ||
559 | lua_insert(L, -(r + 1)); | ||
560 | return r + 1; /* return true + `resume' returns */ | ||
561 | } | ||
562 | } | ||
563 | |||
564 | |||
565 | static int luaB_auxwrap (lua_State *L) { | ||
566 | lua_State *co = lua_tothread(L, lua_upvalueindex(1)); | ||
567 | int r = auxresume(L, co, lua_gettop(L)); | ||
568 | if (r < 0) { | ||
569 | if (lua_isstring(L, -1)) { /* error object is a string? */ | ||
570 | luaL_where(L, 1); /* add extra info */ | ||
571 | lua_insert(L, -2); | ||
572 | lua_concat(L, 2); | ||
573 | } | ||
574 | lua_error(L); /* propagate error */ | ||
575 | } | ||
576 | return r; | ||
577 | } | ||
578 | |||
579 | |||
580 | static int luaB_cocreate (lua_State *L) { | ||
581 | lua_State *NL = lua_newthread(L); | ||
582 | luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1, | ||
583 | "Lua function expected"); | ||
584 | lua_pushvalue(L, 1); /* move function to top */ | ||
585 | lua_xmove(L, NL, 1); /* move function from L to NL */ | ||
586 | return 1; | ||
587 | } | ||
588 | |||
589 | |||
590 | static int luaB_cowrap (lua_State *L) { | ||
591 | luaB_cocreate(L); | ||
592 | lua_pushcclosure(L, luaB_auxwrap, 1); | ||
593 | return 1; | ||
594 | } | ||
595 | |||
596 | |||
597 | static int luaB_yield (lua_State *L) { | ||
598 | return lua_yield(L, lua_gettop(L)); | ||
599 | } | ||
600 | |||
601 | |||
602 | static int luaB_corunning (lua_State *L) { | ||
603 | if (lua_pushthread(L)) | ||
604 | lua_pushnil(L); /* main thread is not a coroutine */ | ||
605 | return 1; | ||
606 | } | ||
607 | |||
608 | |||
609 | static const luaL_Reg co_funcs[] = { | ||
610 | {"create", luaB_cocreate}, | ||
611 | {"resume", luaB_coresume}, | ||
612 | {"running", luaB_corunning}, | ||
613 | {"status", luaB_costatus}, | ||
614 | {"wrap", luaB_cowrap}, | ||
615 | {"yield", luaB_yield}, | ||
616 | {NULL, NULL} | ||
617 | }; | ||
618 | |||
619 | /* }====================================================== */ | ||
620 | |||
621 | |||
622 | static void auxopen (lua_State *L, const char *name, | ||
623 | lua_CFunction f, lua_CFunction u) { | ||
624 | lua_pushcfunction(L, u); | ||
625 | lua_pushcclosure(L, f, 1); | ||
626 | lua_setfield(L, -2, name); | ||
627 | } | ||
628 | |||
629 | |||
630 | static void base_open (lua_State *L) { | ||
631 | /* set global _G */ | ||
632 | lua_pushvalue(L, LUA_GLOBALSINDEX); | ||
633 | lua_setglobal(L, "_G"); | ||
634 | /* open lib into global table */ | ||
635 | luaL_register(L, "_G", base_funcs); | ||
636 | lua_pushliteral(L, LUA_VERSION); | ||
637 | lua_setglobal(L, "_VERSION"); /* set global _VERSION */ | ||
638 | /* `ipairs' and `pairs' need auxliliary functions as upvalues */ | ||
639 | auxopen(L, "ipairs", luaB_ipairs, ipairsaux); | ||
640 | auxopen(L, "pairs", luaB_pairs, luaB_next); | ||
641 | /* `newproxy' needs a weaktable as upvalue */ | ||
642 | lua_createtable(L, 0, 1); /* new table `w' */ | ||
643 | lua_pushvalue(L, -1); /* `w' will be its own metatable */ | ||
644 | lua_setmetatable(L, -2); | ||
645 | lua_pushliteral(L, "kv"); | ||
646 | lua_setfield(L, -2, "__mode"); /* metatable(w).__mode = "kv" */ | ||
647 | lua_pushcclosure(L, luaB_newproxy, 1); | ||
648 | lua_setglobal(L, "newproxy"); /* set global `newproxy' */ | ||
649 | } | ||
650 | |||
651 | |||
652 | LUALIB_API int luaopen_base (lua_State *L) { | ||
653 | base_open(L); | ||
654 | luaL_register(L, LUA_COLIBNAME, co_funcs); | ||
655 | return 2; | ||
656 | } | ||
657 | |||
diff --git a/apps/plugins/lua/lcode.c b/apps/plugins/lua/lcode.c new file mode 100644 index 0000000000..cff626b7fa --- /dev/null +++ b/apps/plugins/lua/lcode.c | |||
@@ -0,0 +1,839 @@ | |||
1 | /* | ||
2 | ** $Id: lcode.c,v 2.25.1.3 2007/12/28 15:32:23 roberto Exp $ | ||
3 | ** Code generator for Lua | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stdlib.h> | ||
9 | |||
10 | #define lcode_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "lcode.h" | ||
16 | #include "ldebug.h" | ||
17 | #include "ldo.h" | ||
18 | #include "lgc.h" | ||
19 | #include "llex.h" | ||
20 | #include "lmem.h" | ||
21 | #include "lobject.h" | ||
22 | #include "lopcodes.h" | ||
23 | #include "lparser.h" | ||
24 | #include "ltable.h" | ||
25 | |||
26 | |||
27 | #define hasjumps(e) ((e)->t != (e)->f) | ||
28 | |||
29 | |||
30 | static int isnumeral(expdesc *e) { | ||
31 | return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP); | ||
32 | } | ||
33 | |||
34 | |||
35 | void luaK_nil (FuncState *fs, int from, int n) { | ||
36 | Instruction *previous; | ||
37 | if (fs->pc > fs->lasttarget) { /* no jumps to current position? */ | ||
38 | if (fs->pc == 0) { /* function start? */ | ||
39 | if (from >= fs->nactvar) | ||
40 | return; /* positions are already clean */ | ||
41 | } | ||
42 | else { | ||
43 | previous = &fs->f->code[fs->pc-1]; | ||
44 | if (GET_OPCODE(*previous) == OP_LOADNIL) { | ||
45 | int pfrom = GETARG_A(*previous); | ||
46 | int pto = GETARG_B(*previous); | ||
47 | if (pfrom <= from && from <= pto+1) { /* can connect both? */ | ||
48 | if (from+n-1 > pto) | ||
49 | SETARG_B(*previous, from+n-1); | ||
50 | return; | ||
51 | } | ||
52 | } | ||
53 | } | ||
54 | } | ||
55 | luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */ | ||
56 | } | ||
57 | |||
58 | |||
59 | int luaK_jump (FuncState *fs) { | ||
60 | int jpc = fs->jpc; /* save list of jumps to here */ | ||
61 | int j; | ||
62 | fs->jpc = NO_JUMP; | ||
63 | j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP); | ||
64 | luaK_concat(fs, &j, jpc); /* keep them on hold */ | ||
65 | return j; | ||
66 | } | ||
67 | |||
68 | |||
69 | void luaK_ret (FuncState *fs, int first, int nret) { | ||
70 | luaK_codeABC(fs, OP_RETURN, first, nret+1, 0); | ||
71 | } | ||
72 | |||
73 | |||
74 | static int condjump (FuncState *fs, OpCode op, int A, int B, int C) { | ||
75 | luaK_codeABC(fs, op, A, B, C); | ||
76 | return luaK_jump(fs); | ||
77 | } | ||
78 | |||
79 | |||
80 | static void fixjump (FuncState *fs, int pc, int dest) { | ||
81 | Instruction *jmp = &fs->f->code[pc]; | ||
82 | int offset = dest-(pc+1); | ||
83 | lua_assert(dest != NO_JUMP); | ||
84 | if (abs(offset) > MAXARG_sBx) | ||
85 | luaX_syntaxerror(fs->ls, "control structure too long"); | ||
86 | SETARG_sBx(*jmp, offset); | ||
87 | } | ||
88 | |||
89 | |||
90 | /* | ||
91 | ** returns current `pc' and marks it as a jump target (to avoid wrong | ||
92 | ** optimizations with consecutive instructions not in the same basic block). | ||
93 | */ | ||
94 | int luaK_getlabel (FuncState *fs) { | ||
95 | fs->lasttarget = fs->pc; | ||
96 | return fs->pc; | ||
97 | } | ||
98 | |||
99 | |||
100 | static int getjump (FuncState *fs, int pc) { | ||
101 | int offset = GETARG_sBx(fs->f->code[pc]); | ||
102 | if (offset == NO_JUMP) /* point to itself represents end of list */ | ||
103 | return NO_JUMP; /* end of list */ | ||
104 | else | ||
105 | return (pc+1)+offset; /* turn offset into absolute position */ | ||
106 | } | ||
107 | |||
108 | |||
109 | static Instruction *getjumpcontrol (FuncState *fs, int pc) { | ||
110 | Instruction *pi = &fs->f->code[pc]; | ||
111 | if (pc >= 1 && testTMode(GET_OPCODE(*(pi-1)))) | ||
112 | return pi-1; | ||
113 | else | ||
114 | return pi; | ||
115 | } | ||
116 | |||
117 | |||
118 | /* | ||
119 | ** check whether list has any jump that do not produce a value | ||
120 | ** (or produce an inverted value) | ||
121 | */ | ||
122 | static int need_value (FuncState *fs, int list) { | ||
123 | for (; list != NO_JUMP; list = getjump(fs, list)) { | ||
124 | Instruction i = *getjumpcontrol(fs, list); | ||
125 | if (GET_OPCODE(i) != OP_TESTSET) return 1; | ||
126 | } | ||
127 | return 0; /* not found */ | ||
128 | } | ||
129 | |||
130 | |||
131 | static int patchtestreg (FuncState *fs, int node, int reg) { | ||
132 | Instruction *i = getjumpcontrol(fs, node); | ||
133 | if (GET_OPCODE(*i) != OP_TESTSET) | ||
134 | return 0; /* cannot patch other instructions */ | ||
135 | if (reg != NO_REG && reg != GETARG_B(*i)) | ||
136 | SETARG_A(*i, reg); | ||
137 | else /* no register to put value or register already has the value */ | ||
138 | *i = CREATE_ABC(OP_TEST, GETARG_B(*i), 0, GETARG_C(*i)); | ||
139 | |||
140 | return 1; | ||
141 | } | ||
142 | |||
143 | |||
144 | static void removevalues (FuncState *fs, int list) { | ||
145 | for (; list != NO_JUMP; list = getjump(fs, list)) | ||
146 | patchtestreg(fs, list, NO_REG); | ||
147 | } | ||
148 | |||
149 | |||
150 | static void patchlistaux (FuncState *fs, int list, int vtarget, int reg, | ||
151 | int dtarget) { | ||
152 | while (list != NO_JUMP) { | ||
153 | int next = getjump(fs, list); | ||
154 | if (patchtestreg(fs, list, reg)) | ||
155 | fixjump(fs, list, vtarget); | ||
156 | else | ||
157 | fixjump(fs, list, dtarget); /* jump to default target */ | ||
158 | list = next; | ||
159 | } | ||
160 | } | ||
161 | |||
162 | |||
163 | static void dischargejpc (FuncState *fs) { | ||
164 | patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc); | ||
165 | fs->jpc = NO_JUMP; | ||
166 | } | ||
167 | |||
168 | |||
169 | void luaK_patchlist (FuncState *fs, int list, int target) { | ||
170 | if (target == fs->pc) | ||
171 | luaK_patchtohere(fs, list); | ||
172 | else { | ||
173 | lua_assert(target < fs->pc); | ||
174 | patchlistaux(fs, list, target, NO_REG, target); | ||
175 | } | ||
176 | } | ||
177 | |||
178 | |||
179 | void luaK_patchtohere (FuncState *fs, int list) { | ||
180 | luaK_getlabel(fs); | ||
181 | luaK_concat(fs, &fs->jpc, list); | ||
182 | } | ||
183 | |||
184 | |||
185 | void luaK_concat (FuncState *fs, int *l1, int l2) { | ||
186 | if (l2 == NO_JUMP) return; | ||
187 | else if (*l1 == NO_JUMP) | ||
188 | *l1 = l2; | ||
189 | else { | ||
190 | int list = *l1; | ||
191 | int next; | ||
192 | while ((next = getjump(fs, list)) != NO_JUMP) /* find last element */ | ||
193 | list = next; | ||
194 | fixjump(fs, list, l2); | ||
195 | } | ||
196 | } | ||
197 | |||
198 | |||
199 | void luaK_checkstack (FuncState *fs, int n) { | ||
200 | int newstack = fs->freereg + n; | ||
201 | if (newstack > fs->f->maxstacksize) { | ||
202 | if (newstack >= MAXSTACK) | ||
203 | luaX_syntaxerror(fs->ls, "function or expression too complex"); | ||
204 | fs->f->maxstacksize = cast_byte(newstack); | ||
205 | } | ||
206 | } | ||
207 | |||
208 | |||
209 | void luaK_reserveregs (FuncState *fs, int n) { | ||
210 | luaK_checkstack(fs, n); | ||
211 | fs->freereg += n; | ||
212 | } | ||
213 | |||
214 | |||
215 | static void freereg (FuncState *fs, int reg) { | ||
216 | if (!ISK(reg) && reg >= fs->nactvar) { | ||
217 | fs->freereg--; | ||
218 | lua_assert(reg == fs->freereg); | ||
219 | } | ||
220 | } | ||
221 | |||
222 | |||
223 | static void freeexp (FuncState *fs, expdesc *e) { | ||
224 | if (e->k == VNONRELOC) | ||
225 | freereg(fs, e->u.s.info); | ||
226 | } | ||
227 | |||
228 | |||
229 | static int addk (FuncState *fs, TValue *k, TValue *v) { | ||
230 | lua_State *L = fs->L; | ||
231 | TValue *idx = luaH_set(L, fs->h, k); | ||
232 | Proto *f = fs->f; | ||
233 | int oldsize = f->sizek; | ||
234 | if (ttisnumber(idx)) { | ||
235 | lua_assert(luaO_rawequalObj(&fs->f->k[cast_int(nvalue(idx))], v)); | ||
236 | return cast_int(nvalue(idx)); | ||
237 | } | ||
238 | else { /* constant not found; create a new entry */ | ||
239 | setnvalue(idx, cast_num(fs->nk)); | ||
240 | luaM_growvector(L, f->k, fs->nk, f->sizek, TValue, | ||
241 | MAXARG_Bx, "constant table overflow"); | ||
242 | while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]); | ||
243 | setobj(L, &f->k[fs->nk], v); | ||
244 | luaC_barrier(L, f, v); | ||
245 | return fs->nk++; | ||
246 | } | ||
247 | } | ||
248 | |||
249 | |||
250 | int luaK_stringK (FuncState *fs, TString *s) { | ||
251 | TValue o; | ||
252 | setsvalue(fs->L, &o, s); | ||
253 | return addk(fs, &o, &o); | ||
254 | } | ||
255 | |||
256 | |||
257 | int luaK_numberK (FuncState *fs, lua_Number r) { | ||
258 | TValue o; | ||
259 | setnvalue(&o, r); | ||
260 | return addk(fs, &o, &o); | ||
261 | } | ||
262 | |||
263 | |||
264 | static int boolK (FuncState *fs, int b) { | ||
265 | TValue o; | ||
266 | setbvalue(&o, b); | ||
267 | return addk(fs, &o, &o); | ||
268 | } | ||
269 | |||
270 | |||
271 | static int nilK (FuncState *fs) { | ||
272 | TValue k, v; | ||
273 | setnilvalue(&v); | ||
274 | /* cannot use nil as key; instead use table itself to represent nil */ | ||
275 | sethvalue(fs->L, &k, fs->h); | ||
276 | return addk(fs, &k, &v); | ||
277 | } | ||
278 | |||
279 | |||
280 | void luaK_setreturns (FuncState *fs, expdesc *e, int nresults) { | ||
281 | if (e->k == VCALL) { /* expression is an open function call? */ | ||
282 | SETARG_C(getcode(fs, e), nresults+1); | ||
283 | } | ||
284 | else if (e->k == VVARARG) { | ||
285 | SETARG_B(getcode(fs, e), nresults+1); | ||
286 | SETARG_A(getcode(fs, e), fs->freereg); | ||
287 | luaK_reserveregs(fs, 1); | ||
288 | } | ||
289 | } | ||
290 | |||
291 | |||
292 | void luaK_setoneret (FuncState *fs, expdesc *e) { | ||
293 | if (e->k == VCALL) { /* expression is an open function call? */ | ||
294 | e->k = VNONRELOC; | ||
295 | e->u.s.info = GETARG_A(getcode(fs, e)); | ||
296 | } | ||
297 | else if (e->k == VVARARG) { | ||
298 | SETARG_B(getcode(fs, e), 2); | ||
299 | e->k = VRELOCABLE; /* can relocate its simple result */ | ||
300 | } | ||
301 | } | ||
302 | |||
303 | |||
304 | void luaK_dischargevars (FuncState *fs, expdesc *e) { | ||
305 | switch (e->k) { | ||
306 | case VLOCAL: { | ||
307 | e->k = VNONRELOC; | ||
308 | break; | ||
309 | } | ||
310 | case VUPVAL: { | ||
311 | e->u.s.info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->u.s.info, 0); | ||
312 | e->k = VRELOCABLE; | ||
313 | break; | ||
314 | } | ||
315 | case VGLOBAL: { | ||
316 | e->u.s.info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->u.s.info); | ||
317 | e->k = VRELOCABLE; | ||
318 | break; | ||
319 | } | ||
320 | case VINDEXED: { | ||
321 | freereg(fs, e->u.s.aux); | ||
322 | freereg(fs, e->u.s.info); | ||
323 | e->u.s.info = luaK_codeABC(fs, OP_GETTABLE, 0, e->u.s.info, e->u.s.aux); | ||
324 | e->k = VRELOCABLE; | ||
325 | break; | ||
326 | } | ||
327 | case VVARARG: | ||
328 | case VCALL: { | ||
329 | luaK_setoneret(fs, e); | ||
330 | break; | ||
331 | } | ||
332 | default: break; /* there is one value available (somewhere) */ | ||
333 | } | ||
334 | } | ||
335 | |||
336 | |||
337 | static int code_label (FuncState *fs, int A, int b, int jump) { | ||
338 | luaK_getlabel(fs); /* those instructions may be jump targets */ | ||
339 | return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump); | ||
340 | } | ||
341 | |||
342 | |||
343 | static void discharge2reg (FuncState *fs, expdesc *e, int reg) { | ||
344 | luaK_dischargevars(fs, e); | ||
345 | switch (e->k) { | ||
346 | case VNIL: { | ||
347 | luaK_nil(fs, reg, 1); | ||
348 | break; | ||
349 | } | ||
350 | case VFALSE: case VTRUE: { | ||
351 | luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0); | ||
352 | break; | ||
353 | } | ||
354 | case VK: { | ||
355 | luaK_codeABx(fs, OP_LOADK, reg, e->u.s.info); | ||
356 | break; | ||
357 | } | ||
358 | case VKNUM: { | ||
359 | luaK_codeABx(fs, OP_LOADK, reg, luaK_numberK(fs, e->u.nval)); | ||
360 | break; | ||
361 | } | ||
362 | case VRELOCABLE: { | ||
363 | Instruction *pc = &getcode(fs, e); | ||
364 | SETARG_A(*pc, reg); | ||
365 | break; | ||
366 | } | ||
367 | case VNONRELOC: { | ||
368 | if (reg != e->u.s.info) | ||
369 | luaK_codeABC(fs, OP_MOVE, reg, e->u.s.info, 0); | ||
370 | break; | ||
371 | } | ||
372 | default: { | ||
373 | lua_assert(e->k == VVOID || e->k == VJMP); | ||
374 | return; /* nothing to do... */ | ||
375 | } | ||
376 | } | ||
377 | e->u.s.info = reg; | ||
378 | e->k = VNONRELOC; | ||
379 | } | ||
380 | |||
381 | |||
382 | static void discharge2anyreg (FuncState *fs, expdesc *e) { | ||
383 | if (e->k != VNONRELOC) { | ||
384 | luaK_reserveregs(fs, 1); | ||
385 | discharge2reg(fs, e, fs->freereg-1); | ||
386 | } | ||
387 | } | ||
388 | |||
389 | |||
390 | static void exp2reg (FuncState *fs, expdesc *e, int reg) { | ||
391 | discharge2reg(fs, e, reg); | ||
392 | if (e->k == VJMP) | ||
393 | luaK_concat(fs, &e->t, e->u.s.info); /* put this jump in `t' list */ | ||
394 | if (hasjumps(e)) { | ||
395 | int final; /* position after whole expression */ | ||
396 | int p_f = NO_JUMP; /* position of an eventual LOAD false */ | ||
397 | int p_t = NO_JUMP; /* position of an eventual LOAD true */ | ||
398 | if (need_value(fs, e->t) || need_value(fs, e->f)) { | ||
399 | int fj = (e->k == VJMP) ? NO_JUMP : luaK_jump(fs); | ||
400 | p_f = code_label(fs, reg, 0, 1); | ||
401 | p_t = code_label(fs, reg, 1, 0); | ||
402 | luaK_patchtohere(fs, fj); | ||
403 | } | ||
404 | final = luaK_getlabel(fs); | ||
405 | patchlistaux(fs, e->f, final, reg, p_f); | ||
406 | patchlistaux(fs, e->t, final, reg, p_t); | ||
407 | } | ||
408 | e->f = e->t = NO_JUMP; | ||
409 | e->u.s.info = reg; | ||
410 | e->k = VNONRELOC; | ||
411 | } | ||
412 | |||
413 | |||
414 | void luaK_exp2nextreg (FuncState *fs, expdesc *e) { | ||
415 | luaK_dischargevars(fs, e); | ||
416 | freeexp(fs, e); | ||
417 | luaK_reserveregs(fs, 1); | ||
418 | exp2reg(fs, e, fs->freereg - 1); | ||
419 | } | ||
420 | |||
421 | |||
422 | int luaK_exp2anyreg (FuncState *fs, expdesc *e) { | ||
423 | luaK_dischargevars(fs, e); | ||
424 | if (e->k == VNONRELOC) { | ||
425 | if (!hasjumps(e)) return e->u.s.info; /* exp is already in a register */ | ||
426 | if (e->u.s.info >= fs->nactvar) { /* reg. is not a local? */ | ||
427 | exp2reg(fs, e, e->u.s.info); /* put value on it */ | ||
428 | return e->u.s.info; | ||
429 | } | ||
430 | } | ||
431 | luaK_exp2nextreg(fs, e); /* default */ | ||
432 | return e->u.s.info; | ||
433 | } | ||
434 | |||
435 | |||
436 | void luaK_exp2val (FuncState *fs, expdesc *e) { | ||
437 | if (hasjumps(e)) | ||
438 | luaK_exp2anyreg(fs, e); | ||
439 | else | ||
440 | luaK_dischargevars(fs, e); | ||
441 | } | ||
442 | |||
443 | |||
444 | int luaK_exp2RK (FuncState *fs, expdesc *e) { | ||
445 | luaK_exp2val(fs, e); | ||
446 | switch (e->k) { | ||
447 | case VKNUM: | ||
448 | case VTRUE: | ||
449 | case VFALSE: | ||
450 | case VNIL: { | ||
451 | if (fs->nk <= MAXINDEXRK) { /* constant fit in RK operand? */ | ||
452 | e->u.s.info = (e->k == VNIL) ? nilK(fs) : | ||
453 | (e->k == VKNUM) ? luaK_numberK(fs, e->u.nval) : | ||
454 | boolK(fs, (e->k == VTRUE)); | ||
455 | e->k = VK; | ||
456 | return RKASK(e->u.s.info); | ||
457 | } | ||
458 | else break; | ||
459 | } | ||
460 | case VK: { | ||
461 | if (e->u.s.info <= MAXINDEXRK) /* constant fit in argC? */ | ||
462 | return RKASK(e->u.s.info); | ||
463 | else break; | ||
464 | } | ||
465 | default: break; | ||
466 | } | ||
467 | /* not a constant in the right range: put it in a register */ | ||
468 | return luaK_exp2anyreg(fs, e); | ||
469 | } | ||
470 | |||
471 | |||
472 | void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) { | ||
473 | switch (var->k) { | ||
474 | case VLOCAL: { | ||
475 | freeexp(fs, ex); | ||
476 | exp2reg(fs, ex, var->u.s.info); | ||
477 | return; | ||
478 | } | ||
479 | case VUPVAL: { | ||
480 | int e = luaK_exp2anyreg(fs, ex); | ||
481 | luaK_codeABC(fs, OP_SETUPVAL, e, var->u.s.info, 0); | ||
482 | break; | ||
483 | } | ||
484 | case VGLOBAL: { | ||
485 | int e = luaK_exp2anyreg(fs, ex); | ||
486 | luaK_codeABx(fs, OP_SETGLOBAL, e, var->u.s.info); | ||
487 | break; | ||
488 | } | ||
489 | case VINDEXED: { | ||
490 | int e = luaK_exp2RK(fs, ex); | ||
491 | luaK_codeABC(fs, OP_SETTABLE, var->u.s.info, var->u.s.aux, e); | ||
492 | break; | ||
493 | } | ||
494 | default: { | ||
495 | lua_assert(0); /* invalid var kind to store */ | ||
496 | break; | ||
497 | } | ||
498 | } | ||
499 | freeexp(fs, ex); | ||
500 | } | ||
501 | |||
502 | |||
503 | void luaK_self (FuncState *fs, expdesc *e, expdesc *key) { | ||
504 | int func; | ||
505 | luaK_exp2anyreg(fs, e); | ||
506 | freeexp(fs, e); | ||
507 | func = fs->freereg; | ||
508 | luaK_reserveregs(fs, 2); | ||
509 | luaK_codeABC(fs, OP_SELF, func, e->u.s.info, luaK_exp2RK(fs, key)); | ||
510 | freeexp(fs, key); | ||
511 | e->u.s.info = func; | ||
512 | e->k = VNONRELOC; | ||
513 | } | ||
514 | |||
515 | |||
516 | static void invertjump (FuncState *fs, expdesc *e) { | ||
517 | Instruction *pc = getjumpcontrol(fs, e->u.s.info); | ||
518 | lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET && | ||
519 | GET_OPCODE(*pc) != OP_TEST); | ||
520 | SETARG_A(*pc, !(GETARG_A(*pc))); | ||
521 | } | ||
522 | |||
523 | |||
524 | static int jumponcond (FuncState *fs, expdesc *e, int cond) { | ||
525 | if (e->k == VRELOCABLE) { | ||
526 | Instruction ie = getcode(fs, e); | ||
527 | if (GET_OPCODE(ie) == OP_NOT) { | ||
528 | fs->pc--; /* remove previous OP_NOT */ | ||
529 | return condjump(fs, OP_TEST, GETARG_B(ie), 0, !cond); | ||
530 | } | ||
531 | /* else go through */ | ||
532 | } | ||
533 | discharge2anyreg(fs, e); | ||
534 | freeexp(fs, e); | ||
535 | return condjump(fs, OP_TESTSET, NO_REG, e->u.s.info, cond); | ||
536 | } | ||
537 | |||
538 | |||
539 | void luaK_goiftrue (FuncState *fs, expdesc *e) { | ||
540 | int pc; /* pc of last jump */ | ||
541 | luaK_dischargevars(fs, e); | ||
542 | switch (e->k) { | ||
543 | case VK: case VKNUM: case VTRUE: { | ||
544 | pc = NO_JUMP; /* always true; do nothing */ | ||
545 | break; | ||
546 | } | ||
547 | case VFALSE: { | ||
548 | pc = luaK_jump(fs); /* always jump */ | ||
549 | break; | ||
550 | } | ||
551 | case VJMP: { | ||
552 | invertjump(fs, e); | ||
553 | pc = e->u.s.info; | ||
554 | break; | ||
555 | } | ||
556 | default: { | ||
557 | pc = jumponcond(fs, e, 0); | ||
558 | break; | ||
559 | } | ||
560 | } | ||
561 | luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */ | ||
562 | luaK_patchtohere(fs, e->t); | ||
563 | e->t = NO_JUMP; | ||
564 | } | ||
565 | |||
566 | |||
567 | static void luaK_goiffalse (FuncState *fs, expdesc *e) { | ||
568 | int pc; /* pc of last jump */ | ||
569 | luaK_dischargevars(fs, e); | ||
570 | switch (e->k) { | ||
571 | case VNIL: case VFALSE: { | ||
572 | pc = NO_JUMP; /* always false; do nothing */ | ||
573 | break; | ||
574 | } | ||
575 | case VTRUE: { | ||
576 | pc = luaK_jump(fs); /* always jump */ | ||
577 | break; | ||
578 | } | ||
579 | case VJMP: { | ||
580 | pc = e->u.s.info; | ||
581 | break; | ||
582 | } | ||
583 | default: { | ||
584 | pc = jumponcond(fs, e, 1); | ||
585 | break; | ||
586 | } | ||
587 | } | ||
588 | luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */ | ||
589 | luaK_patchtohere(fs, e->f); | ||
590 | e->f = NO_JUMP; | ||
591 | } | ||
592 | |||
593 | |||
594 | static void codenot (FuncState *fs, expdesc *e) { | ||
595 | luaK_dischargevars(fs, e); | ||
596 | switch (e->k) { | ||
597 | case VNIL: case VFALSE: { | ||
598 | e->k = VTRUE; | ||
599 | break; | ||
600 | } | ||
601 | case VK: case VKNUM: case VTRUE: { | ||
602 | e->k = VFALSE; | ||
603 | break; | ||
604 | } | ||
605 | case VJMP: { | ||
606 | invertjump(fs, e); | ||
607 | break; | ||
608 | } | ||
609 | case VRELOCABLE: | ||
610 | case VNONRELOC: { | ||
611 | discharge2anyreg(fs, e); | ||
612 | freeexp(fs, e); | ||
613 | e->u.s.info = luaK_codeABC(fs, OP_NOT, 0, e->u.s.info, 0); | ||
614 | e->k = VRELOCABLE; | ||
615 | break; | ||
616 | } | ||
617 | default: { | ||
618 | lua_assert(0); /* cannot happen */ | ||
619 | break; | ||
620 | } | ||
621 | } | ||
622 | /* interchange true and false lists */ | ||
623 | { int temp = e->f; e->f = e->t; e->t = temp; } | ||
624 | removevalues(fs, e->f); | ||
625 | removevalues(fs, e->t); | ||
626 | } | ||
627 | |||
628 | |||
629 | void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) { | ||
630 | t->u.s.aux = luaK_exp2RK(fs, k); | ||
631 | t->k = VINDEXED; | ||
632 | } | ||
633 | |||
634 | |||
635 | static int constfolding (OpCode op, expdesc *e1, expdesc *e2) { | ||
636 | lua_Number v1, v2, r; | ||
637 | if (!isnumeral(e1) || !isnumeral(e2)) return 0; | ||
638 | v1 = e1->u.nval; | ||
639 | v2 = e2->u.nval; | ||
640 | switch (op) { | ||
641 | case OP_ADD: r = luai_numadd(v1, v2); break; | ||
642 | case OP_SUB: r = luai_numsub(v1, v2); break; | ||
643 | case OP_MUL: r = luai_nummul(v1, v2); break; | ||
644 | case OP_DIV: | ||
645 | if (v2 == 0) return 0; /* do not attempt to divide by 0 */ | ||
646 | r = luai_numdiv(v1, v2); break; | ||
647 | case OP_MOD: | ||
648 | if (v2 == 0) return 0; /* do not attempt to divide by 0 */ | ||
649 | r = luai_nummod(v1, v2); break; | ||
650 | case OP_POW: r = luai_numpow(v1, v2); break; | ||
651 | case OP_UNM: r = luai_numunm(v1); break; | ||
652 | case OP_LEN: return 0; /* no constant folding for 'len' */ | ||
653 | default: lua_assert(0); r = 0; break; | ||
654 | } | ||
655 | if (luai_numisnan(r)) return 0; /* do not attempt to produce NaN */ | ||
656 | e1->u.nval = r; | ||
657 | return 1; | ||
658 | } | ||
659 | |||
660 | |||
661 | static void codearith (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2) { | ||
662 | if (constfolding(op, e1, e2)) | ||
663 | return; | ||
664 | else { | ||
665 | int o2 = (op != OP_UNM && op != OP_LEN) ? luaK_exp2RK(fs, e2) : 0; | ||
666 | int o1 = luaK_exp2RK(fs, e1); | ||
667 | if (o1 > o2) { | ||
668 | freeexp(fs, e1); | ||
669 | freeexp(fs, e2); | ||
670 | } | ||
671 | else { | ||
672 | freeexp(fs, e2); | ||
673 | freeexp(fs, e1); | ||
674 | } | ||
675 | e1->u.s.info = luaK_codeABC(fs, op, 0, o1, o2); | ||
676 | e1->k = VRELOCABLE; | ||
677 | } | ||
678 | } | ||
679 | |||
680 | |||
681 | static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1, | ||
682 | expdesc *e2) { | ||
683 | int o1 = luaK_exp2RK(fs, e1); | ||
684 | int o2 = luaK_exp2RK(fs, e2); | ||
685 | freeexp(fs, e2); | ||
686 | freeexp(fs, e1); | ||
687 | if (cond == 0 && op != OP_EQ) { | ||
688 | int temp; /* exchange args to replace by `<' or `<=' */ | ||
689 | temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */ | ||
690 | cond = 1; | ||
691 | } | ||
692 | e1->u.s.info = condjump(fs, op, cond, o1, o2); | ||
693 | e1->k = VJMP; | ||
694 | } | ||
695 | |||
696 | |||
697 | void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) { | ||
698 | expdesc e2; | ||
699 | e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0; | ||
700 | switch (op) { | ||
701 | case OPR_MINUS: { | ||
702 | if (!isnumeral(e)) | ||
703 | luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */ | ||
704 | codearith(fs, OP_UNM, e, &e2); | ||
705 | break; | ||
706 | } | ||
707 | case OPR_NOT: codenot(fs, e); break; | ||
708 | case OPR_LEN: { | ||
709 | luaK_exp2anyreg(fs, e); /* cannot operate on constants */ | ||
710 | codearith(fs, OP_LEN, e, &e2); | ||
711 | break; | ||
712 | } | ||
713 | default: lua_assert(0); | ||
714 | } | ||
715 | } | ||
716 | |||
717 | |||
718 | void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) { | ||
719 | switch (op) { | ||
720 | case OPR_AND: { | ||
721 | luaK_goiftrue(fs, v); | ||
722 | break; | ||
723 | } | ||
724 | case OPR_OR: { | ||
725 | luaK_goiffalse(fs, v); | ||
726 | break; | ||
727 | } | ||
728 | case OPR_CONCAT: { | ||
729 | luaK_exp2nextreg(fs, v); /* operand must be on the `stack' */ | ||
730 | break; | ||
731 | } | ||
732 | case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV: | ||
733 | case OPR_MOD: case OPR_POW: { | ||
734 | if (!isnumeral(v)) luaK_exp2RK(fs, v); | ||
735 | break; | ||
736 | } | ||
737 | default: { | ||
738 | luaK_exp2RK(fs, v); | ||
739 | break; | ||
740 | } | ||
741 | } | ||
742 | } | ||
743 | |||
744 | |||
745 | void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) { | ||
746 | switch (op) { | ||
747 | case OPR_AND: { | ||
748 | lua_assert(e1->t == NO_JUMP); /* list must be closed */ | ||
749 | luaK_dischargevars(fs, e2); | ||
750 | luaK_concat(fs, &e2->f, e1->f); | ||
751 | *e1 = *e2; | ||
752 | break; | ||
753 | } | ||
754 | case OPR_OR: { | ||
755 | lua_assert(e1->f == NO_JUMP); /* list must be closed */ | ||
756 | luaK_dischargevars(fs, e2); | ||
757 | luaK_concat(fs, &e2->t, e1->t); | ||
758 | *e1 = *e2; | ||
759 | break; | ||
760 | } | ||
761 | case OPR_CONCAT: { | ||
762 | luaK_exp2val(fs, e2); | ||
763 | if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) { | ||
764 | lua_assert(e1->u.s.info == GETARG_B(getcode(fs, e2))-1); | ||
765 | freeexp(fs, e1); | ||
766 | SETARG_B(getcode(fs, e2), e1->u.s.info); | ||
767 | e1->k = VRELOCABLE; e1->u.s.info = e2->u.s.info; | ||
768 | } | ||
769 | else { | ||
770 | luaK_exp2nextreg(fs, e2); /* operand must be on the 'stack' */ | ||
771 | codearith(fs, OP_CONCAT, e1, e2); | ||
772 | } | ||
773 | break; | ||
774 | } | ||
775 | case OPR_ADD: codearith(fs, OP_ADD, e1, e2); break; | ||
776 | case OPR_SUB: codearith(fs, OP_SUB, e1, e2); break; | ||
777 | case OPR_MUL: codearith(fs, OP_MUL, e1, e2); break; | ||
778 | case OPR_DIV: codearith(fs, OP_DIV, e1, e2); break; | ||
779 | case OPR_MOD: codearith(fs, OP_MOD, e1, e2); break; | ||
780 | case OPR_POW: codearith(fs, OP_POW, e1, e2); break; | ||
781 | case OPR_EQ: codecomp(fs, OP_EQ, 1, e1, e2); break; | ||
782 | case OPR_NE: codecomp(fs, OP_EQ, 0, e1, e2); break; | ||
783 | case OPR_LT: codecomp(fs, OP_LT, 1, e1, e2); break; | ||
784 | case OPR_LE: codecomp(fs, OP_LE, 1, e1, e2); break; | ||
785 | case OPR_GT: codecomp(fs, OP_LT, 0, e1, e2); break; | ||
786 | case OPR_GE: codecomp(fs, OP_LE, 0, e1, e2); break; | ||
787 | default: lua_assert(0); | ||
788 | } | ||
789 | } | ||
790 | |||
791 | |||
792 | void luaK_fixline (FuncState *fs, int line) { | ||
793 | fs->f->lineinfo[fs->pc - 1] = line; | ||
794 | } | ||
795 | |||
796 | |||
797 | static int luaK_code (FuncState *fs, Instruction i, int line) { | ||
798 | Proto *f = fs->f; | ||
799 | dischargejpc(fs); /* `pc' will change */ | ||
800 | /* put new instruction in code array */ | ||
801 | luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction, | ||
802 | MAX_INT, "code size overflow"); | ||
803 | f->code[fs->pc] = i; | ||
804 | /* save corresponding line information */ | ||
805 | luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int, | ||
806 | MAX_INT, "code size overflow"); | ||
807 | f->lineinfo[fs->pc] = line; | ||
808 | return fs->pc++; | ||
809 | } | ||
810 | |||
811 | |||
812 | int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) { | ||
813 | lua_assert(getOpMode(o) == iABC); | ||
814 | lua_assert(getBMode(o) != OpArgN || b == 0); | ||
815 | lua_assert(getCMode(o) != OpArgN || c == 0); | ||
816 | return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline); | ||
817 | } | ||
818 | |||
819 | |||
820 | int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) { | ||
821 | lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx); | ||
822 | lua_assert(getCMode(o) == OpArgN); | ||
823 | return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline); | ||
824 | } | ||
825 | |||
826 | |||
827 | void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) { | ||
828 | int c = (nelems - 1)/LFIELDS_PER_FLUSH + 1; | ||
829 | int b = (tostore == LUA_MULTRET) ? 0 : tostore; | ||
830 | lua_assert(tostore != 0); | ||
831 | if (c <= MAXARG_C) | ||
832 | luaK_codeABC(fs, OP_SETLIST, base, b, c); | ||
833 | else { | ||
834 | luaK_codeABC(fs, OP_SETLIST, base, b, 0); | ||
835 | luaK_code(fs, cast(Instruction, c), fs->ls->lastline); | ||
836 | } | ||
837 | fs->freereg = base + 1; /* free registers with list values */ | ||
838 | } | ||
839 | |||
diff --git a/apps/plugins/lua/lcode.h b/apps/plugins/lua/lcode.h new file mode 100644 index 0000000000..751b2b5695 --- /dev/null +++ b/apps/plugins/lua/lcode.h | |||
@@ -0,0 +1,76 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Code generator for Lua | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lcode_h | ||
8 | #define lcode_h | ||
9 | |||
10 | #include "llex.h" | ||
11 | #include "lobject.h" | ||
12 | #include "lopcodes.h" | ||
13 | #include "lparser.h" | ||
14 | |||
15 | |||
16 | /* | ||
17 | ** Marks the end of a patch list. It is an invalid value both as an absolute | ||
18 | ** address, and as a list link (would link an element to itself). | ||
19 | */ | ||
20 | #define NO_JUMP (-1) | ||
21 | |||
22 | |||
23 | /* | ||
24 | ** grep "ORDER OPR" if you change these enums | ||
25 | */ | ||
26 | typedef enum BinOpr { | ||
27 | OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW, | ||
28 | OPR_CONCAT, | ||
29 | OPR_NE, OPR_EQ, | ||
30 | OPR_LT, OPR_LE, OPR_GT, OPR_GE, | ||
31 | OPR_AND, OPR_OR, | ||
32 | OPR_NOBINOPR | ||
33 | } BinOpr; | ||
34 | |||
35 | |||
36 | typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr; | ||
37 | |||
38 | |||
39 | #define getcode(fs,e) ((fs)->f->code[(e)->u.s.info]) | ||
40 | |||
41 | #define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx) | ||
42 | |||
43 | #define luaK_setmultret(fs,e) luaK_setreturns(fs, e, LUA_MULTRET) | ||
44 | |||
45 | LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx); | ||
46 | LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C); | ||
47 | LUAI_FUNC void luaK_fixline (FuncState *fs, int line); | ||
48 | LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n); | ||
49 | LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n); | ||
50 | LUAI_FUNC void luaK_checkstack (FuncState *fs, int n); | ||
51 | LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s); | ||
52 | LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r); | ||
53 | LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e); | ||
54 | LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e); | ||
55 | LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e); | ||
56 | LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e); | ||
57 | LUAI_FUNC int luaK_exp2RK (FuncState *fs, expdesc *e); | ||
58 | LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key); | ||
59 | LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k); | ||
60 | LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e); | ||
61 | LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e); | ||
62 | LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults); | ||
63 | LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e); | ||
64 | LUAI_FUNC int luaK_jump (FuncState *fs); | ||
65 | LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret); | ||
66 | LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target); | ||
67 | LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list); | ||
68 | LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2); | ||
69 | LUAI_FUNC int luaK_getlabel (FuncState *fs); | ||
70 | LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v); | ||
71 | LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v); | ||
72 | LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2); | ||
73 | LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore); | ||
74 | |||
75 | |||
76 | #endif | ||
diff --git a/apps/plugins/lua/ldebug.c b/apps/plugins/lua/ldebug.c new file mode 100644 index 0000000000..50ad3d3803 --- /dev/null +++ b/apps/plugins/lua/ldebug.c | |||
@@ -0,0 +1,638 @@ | |||
1 | /* | ||
2 | ** $Id: ldebug.c,v 2.29.1.6 2008/05/08 16:56:26 roberto Exp $ | ||
3 | ** Debug Interface | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stdarg.h> | ||
9 | #include <stddef.h> | ||
10 | #include <string.h> | ||
11 | |||
12 | |||
13 | #define ldebug_c | ||
14 | #define LUA_CORE | ||
15 | |||
16 | #include "lua.h" | ||
17 | |||
18 | #include "lapi.h" | ||
19 | #include "lcode.h" | ||
20 | #include "ldebug.h" | ||
21 | #include "ldo.h" | ||
22 | #include "lfunc.h" | ||
23 | #include "lobject.h" | ||
24 | #include "lopcodes.h" | ||
25 | #include "lstate.h" | ||
26 | #include "lstring.h" | ||
27 | #include "ltable.h" | ||
28 | #include "ltm.h" | ||
29 | #include "lvm.h" | ||
30 | |||
31 | |||
32 | |||
33 | static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name); | ||
34 | |||
35 | |||
36 | static int currentpc (lua_State *L, CallInfo *ci) { | ||
37 | if (!isLua(ci)) return -1; /* function is not a Lua function? */ | ||
38 | if (ci == L->ci) | ||
39 | ci->savedpc = L->savedpc; | ||
40 | return pcRel(ci->savedpc, ci_func(ci)->l.p); | ||
41 | } | ||
42 | |||
43 | |||
44 | static int currentline (lua_State *L, CallInfo *ci) { | ||
45 | int pc = currentpc(L, ci); | ||
46 | if (pc < 0) | ||
47 | return -1; /* only active lua functions have current-line information */ | ||
48 | else | ||
49 | return getline(ci_func(ci)->l.p, pc); | ||
50 | } | ||
51 | |||
52 | |||
53 | /* | ||
54 | ** this function can be called asynchronous (e.g. during a signal) | ||
55 | */ | ||
56 | LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) { | ||
57 | if (func == NULL || mask == 0) { /* turn off hooks? */ | ||
58 | mask = 0; | ||
59 | func = NULL; | ||
60 | } | ||
61 | L->hook = func; | ||
62 | L->basehookcount = count; | ||
63 | resethookcount(L); | ||
64 | L->hookmask = cast_byte(mask); | ||
65 | return 1; | ||
66 | } | ||
67 | |||
68 | |||
69 | LUA_API lua_Hook lua_gethook (lua_State *L) { | ||
70 | return L->hook; | ||
71 | } | ||
72 | |||
73 | |||
74 | LUA_API int lua_gethookmask (lua_State *L) { | ||
75 | return L->hookmask; | ||
76 | } | ||
77 | |||
78 | |||
79 | LUA_API int lua_gethookcount (lua_State *L) { | ||
80 | return L->basehookcount; | ||
81 | } | ||
82 | |||
83 | |||
84 | LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) { | ||
85 | int status; | ||
86 | CallInfo *ci; | ||
87 | lua_lock(L); | ||
88 | for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) { | ||
89 | level--; | ||
90 | if (f_isLua(ci)) /* Lua function? */ | ||
91 | level -= ci->tailcalls; /* skip lost tail calls */ | ||
92 | } | ||
93 | if (level == 0 && ci > L->base_ci) { /* level found? */ | ||
94 | status = 1; | ||
95 | ar->i_ci = cast_int(ci - L->base_ci); | ||
96 | } | ||
97 | else if (level < 0) { /* level is of a lost tail call? */ | ||
98 | status = 1; | ||
99 | ar->i_ci = 0; | ||
100 | } | ||
101 | else status = 0; /* no such level */ | ||
102 | lua_unlock(L); | ||
103 | return status; | ||
104 | } | ||
105 | |||
106 | |||
107 | static Proto *getluaproto (CallInfo *ci) { | ||
108 | return (isLua(ci) ? ci_func(ci)->l.p : NULL); | ||
109 | } | ||
110 | |||
111 | |||
112 | static const char *findlocal (lua_State *L, CallInfo *ci, int n) { | ||
113 | const char *name; | ||
114 | Proto *fp = getluaproto(ci); | ||
115 | if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL) | ||
116 | return name; /* is a local variable in a Lua function */ | ||
117 | else { | ||
118 | StkId limit = (ci == L->ci) ? L->top : (ci+1)->func; | ||
119 | if (limit - ci->base >= n && n > 0) /* is 'n' inside 'ci' stack? */ | ||
120 | return "(*temporary)"; | ||
121 | else | ||
122 | return NULL; | ||
123 | } | ||
124 | } | ||
125 | |||
126 | |||
127 | LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) { | ||
128 | CallInfo *ci = L->base_ci + ar->i_ci; | ||
129 | const char *name = findlocal(L, ci, n); | ||
130 | lua_lock(L); | ||
131 | if (name) | ||
132 | luaA_pushobject(L, ci->base + (n - 1)); | ||
133 | lua_unlock(L); | ||
134 | return name; | ||
135 | } | ||
136 | |||
137 | |||
138 | LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) { | ||
139 | CallInfo *ci = L->base_ci + ar->i_ci; | ||
140 | const char *name = findlocal(L, ci, n); | ||
141 | lua_lock(L); | ||
142 | if (name) | ||
143 | setobjs2s(L, ci->base + (n - 1), L->top - 1); | ||
144 | L->top--; /* pop value */ | ||
145 | lua_unlock(L); | ||
146 | return name; | ||
147 | } | ||
148 | |||
149 | |||
150 | static void funcinfo (lua_Debug *ar, Closure *cl) { | ||
151 | if (cl->c.isC) { | ||
152 | ar->source = "=[C]"; | ||
153 | ar->linedefined = -1; | ||
154 | ar->lastlinedefined = -1; | ||
155 | ar->what = "C"; | ||
156 | } | ||
157 | else { | ||
158 | ar->source = getstr(cl->l.p->source); | ||
159 | ar->linedefined = cl->l.p->linedefined; | ||
160 | ar->lastlinedefined = cl->l.p->lastlinedefined; | ||
161 | ar->what = (ar->linedefined == 0) ? "main" : "Lua"; | ||
162 | } | ||
163 | luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE); | ||
164 | } | ||
165 | |||
166 | |||
167 | static void info_tailcall (lua_Debug *ar) { | ||
168 | ar->name = ar->namewhat = ""; | ||
169 | ar->what = "tail"; | ||
170 | ar->lastlinedefined = ar->linedefined = ar->currentline = -1; | ||
171 | ar->source = "=(tail call)"; | ||
172 | luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE); | ||
173 | ar->nups = 0; | ||
174 | } | ||
175 | |||
176 | |||
177 | static void collectvalidlines (lua_State *L, Closure *f) { | ||
178 | if (f == NULL || f->c.isC) { | ||
179 | setnilvalue(L->top); | ||
180 | } | ||
181 | else { | ||
182 | Table *t = luaH_new(L, 0, 0); | ||
183 | int *lineinfo = f->l.p->lineinfo; | ||
184 | int i; | ||
185 | for (i=0; i<f->l.p->sizelineinfo; i++) | ||
186 | setbvalue(luaH_setnum(L, t, lineinfo[i]), 1); | ||
187 | sethvalue(L, L->top, t); | ||
188 | } | ||
189 | incr_top(L); | ||
190 | } | ||
191 | |||
192 | |||
193 | static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar, | ||
194 | Closure *f, CallInfo *ci) { | ||
195 | int status = 1; | ||
196 | if (f == NULL) { | ||
197 | info_tailcall(ar); | ||
198 | return status; | ||
199 | } | ||
200 | for (; *what; what++) { | ||
201 | switch (*what) { | ||
202 | case 'S': { | ||
203 | funcinfo(ar, f); | ||
204 | break; | ||
205 | } | ||
206 | case 'l': { | ||
207 | ar->currentline = (ci) ? currentline(L, ci) : -1; | ||
208 | break; | ||
209 | } | ||
210 | case 'u': { | ||
211 | ar->nups = f->c.nupvalues; | ||
212 | break; | ||
213 | } | ||
214 | case 'n': { | ||
215 | ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL; | ||
216 | if (ar->namewhat == NULL) { | ||
217 | ar->namewhat = ""; /* not found */ | ||
218 | ar->name = NULL; | ||
219 | } | ||
220 | break; | ||
221 | } | ||
222 | case 'L': | ||
223 | case 'f': /* handled by lua_getinfo */ | ||
224 | break; | ||
225 | default: status = 0; /* invalid option */ | ||
226 | } | ||
227 | } | ||
228 | return status; | ||
229 | } | ||
230 | |||
231 | |||
232 | LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) { | ||
233 | int status; | ||
234 | Closure *f = NULL; | ||
235 | CallInfo *ci = NULL; | ||
236 | lua_lock(L); | ||
237 | if (*what == '>') { | ||
238 | StkId func = L->top - 1; | ||
239 | luai_apicheck(L, ttisfunction(func)); | ||
240 | what++; /* skip the '>' */ | ||
241 | f = clvalue(func); | ||
242 | L->top--; /* pop function */ | ||
243 | } | ||
244 | else if (ar->i_ci != 0) { /* no tail call? */ | ||
245 | ci = L->base_ci + ar->i_ci; | ||
246 | lua_assert(ttisfunction(ci->func)); | ||
247 | f = clvalue(ci->func); | ||
248 | } | ||
249 | status = auxgetinfo(L, what, ar, f, ci); | ||
250 | if (strchr(what, 'f')) { | ||
251 | if (f == NULL) setnilvalue(L->top); | ||
252 | else setclvalue(L, L->top, f); | ||
253 | incr_top(L); | ||
254 | } | ||
255 | if (strchr(what, 'L')) | ||
256 | collectvalidlines(L, f); | ||
257 | lua_unlock(L); | ||
258 | return status; | ||
259 | } | ||
260 | |||
261 | |||
262 | /* | ||
263 | ** {====================================================== | ||
264 | ** Symbolic Execution and code checker | ||
265 | ** ======================================================= | ||
266 | */ | ||
267 | |||
268 | #define check(x) if (!(x)) return 0; | ||
269 | |||
270 | #define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode) | ||
271 | |||
272 | #define checkreg(pt,reg) check((reg) < (pt)->maxstacksize) | ||
273 | |||
274 | |||
275 | |||
276 | static int precheck (const Proto *pt) { | ||
277 | check(pt->maxstacksize <= MAXSTACK); | ||
278 | check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize); | ||
279 | check(!(pt->is_vararg & VARARG_NEEDSARG) || | ||
280 | (pt->is_vararg & VARARG_HASARG)); | ||
281 | check(pt->sizeupvalues <= pt->nups); | ||
282 | check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0); | ||
283 | check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN); | ||
284 | return 1; | ||
285 | } | ||
286 | |||
287 | |||
288 | #define checkopenop(pt,pc) luaG_checkopenop((pt)->code[(pc)+1]) | ||
289 | |||
290 | int luaG_checkopenop (Instruction i) { | ||
291 | switch (GET_OPCODE(i)) { | ||
292 | case OP_CALL: | ||
293 | case OP_TAILCALL: | ||
294 | case OP_RETURN: | ||
295 | case OP_SETLIST: { | ||
296 | check(GETARG_B(i) == 0); | ||
297 | return 1; | ||
298 | } | ||
299 | default: return 0; /* invalid instruction after an open call */ | ||
300 | } | ||
301 | } | ||
302 | |||
303 | |||
304 | static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) { | ||
305 | switch (mode) { | ||
306 | case OpArgN: check(r == 0); break; | ||
307 | case OpArgU: break; | ||
308 | case OpArgR: checkreg(pt, r); break; | ||
309 | case OpArgK: | ||
310 | check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize); | ||
311 | break; | ||
312 | } | ||
313 | return 1; | ||
314 | } | ||
315 | |||
316 | |||
317 | static Instruction symbexec (const Proto *pt, int lastpc, int reg) { | ||
318 | int pc; | ||
319 | int last; /* stores position of last instruction that changed `reg' */ | ||
320 | last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */ | ||
321 | check(precheck(pt)); | ||
322 | for (pc = 0; pc < lastpc; pc++) { | ||
323 | Instruction i = pt->code[pc]; | ||
324 | OpCode op = GET_OPCODE(i); | ||
325 | int a = GETARG_A(i); | ||
326 | int b = 0; | ||
327 | int c = 0; | ||
328 | check(op < NUM_OPCODES); | ||
329 | checkreg(pt, a); | ||
330 | switch (getOpMode(op)) { | ||
331 | case iABC: { | ||
332 | b = GETARG_B(i); | ||
333 | c = GETARG_C(i); | ||
334 | check(checkArgMode(pt, b, getBMode(op))); | ||
335 | check(checkArgMode(pt, c, getCMode(op))); | ||
336 | break; | ||
337 | } | ||
338 | case iABx: { | ||
339 | b = GETARG_Bx(i); | ||
340 | if (getBMode(op) == OpArgK) check(b < pt->sizek); | ||
341 | break; | ||
342 | } | ||
343 | case iAsBx: { | ||
344 | b = GETARG_sBx(i); | ||
345 | if (getBMode(op) == OpArgR) { | ||
346 | int dest = pc+1+b; | ||
347 | check(0 <= dest && dest < pt->sizecode); | ||
348 | if (dest > 0) { | ||
349 | int j; | ||
350 | /* check that it does not jump to a setlist count; this | ||
351 | is tricky, because the count from a previous setlist may | ||
352 | have the same value of an invalid setlist; so, we must | ||
353 | go all the way back to the first of them (if any) */ | ||
354 | for (j = 0; j < dest; j++) { | ||
355 | Instruction d = pt->code[dest-1-j]; | ||
356 | if (!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0)) break; | ||
357 | } | ||
358 | /* if 'j' is even, previous value is not a setlist (even if | ||
359 | it looks like one) */ | ||
360 | check((j&1) == 0); | ||
361 | } | ||
362 | } | ||
363 | break; | ||
364 | } | ||
365 | } | ||
366 | if (testAMode(op)) { | ||
367 | if (a == reg) last = pc; /* change register `a' */ | ||
368 | } | ||
369 | if (testTMode(op)) { | ||
370 | check(pc+2 < pt->sizecode); /* check skip */ | ||
371 | check(GET_OPCODE(pt->code[pc+1]) == OP_JMP); | ||
372 | } | ||
373 | switch (op) { | ||
374 | case OP_LOADBOOL: { | ||
375 | if (c == 1) { /* does it jump? */ | ||
376 | check(pc+2 < pt->sizecode); /* check its jump */ | ||
377 | check(GET_OPCODE(pt->code[pc+1]) != OP_SETLIST || | ||
378 | GETARG_C(pt->code[pc+1]) != 0); | ||
379 | } | ||
380 | break; | ||
381 | } | ||
382 | case OP_LOADNIL: { | ||
383 | if (a <= reg && reg <= b) | ||
384 | last = pc; /* set registers from `a' to `b' */ | ||
385 | break; | ||
386 | } | ||
387 | case OP_GETUPVAL: | ||
388 | case OP_SETUPVAL: { | ||
389 | check(b < pt->nups); | ||
390 | break; | ||
391 | } | ||
392 | case OP_GETGLOBAL: | ||
393 | case OP_SETGLOBAL: { | ||
394 | check(ttisstring(&pt->k[b])); | ||
395 | break; | ||
396 | } | ||
397 | case OP_SELF: { | ||
398 | checkreg(pt, a+1); | ||
399 | if (reg == a+1) last = pc; | ||
400 | break; | ||
401 | } | ||
402 | case OP_CONCAT: { | ||
403 | check(b < c); /* at least two operands */ | ||
404 | break; | ||
405 | } | ||
406 | case OP_TFORLOOP: { | ||
407 | check(c >= 1); /* at least one result (control variable) */ | ||
408 | checkreg(pt, a+2+c); /* space for results */ | ||
409 | if (reg >= a+2) last = pc; /* affect all regs above its base */ | ||
410 | break; | ||
411 | } | ||
412 | case OP_FORLOOP: | ||
413 | case OP_FORPREP: | ||
414 | checkreg(pt, a+3); | ||
415 | /* go through */ | ||
416 | case OP_JMP: { | ||
417 | int dest = pc+1+b; | ||
418 | /* not full check and jump is forward and do not skip `lastpc'? */ | ||
419 | if (reg != NO_REG && pc < dest && dest <= lastpc) | ||
420 | pc += b; /* do the jump */ | ||
421 | break; | ||
422 | } | ||
423 | case OP_CALL: | ||
424 | case OP_TAILCALL: { | ||
425 | if (b != 0) { | ||
426 | checkreg(pt, a+b-1); | ||
427 | } | ||
428 | c--; /* c = num. returns */ | ||
429 | if (c == LUA_MULTRET) { | ||
430 | check(checkopenop(pt, pc)); | ||
431 | } | ||
432 | else if (c != 0) | ||
433 | checkreg(pt, a+c-1); | ||
434 | if (reg >= a) last = pc; /* affect all registers above base */ | ||
435 | break; | ||
436 | } | ||
437 | case OP_RETURN: { | ||
438 | b--; /* b = num. returns */ | ||
439 | if (b > 0) checkreg(pt, a+b-1); | ||
440 | break; | ||
441 | } | ||
442 | case OP_SETLIST: { | ||
443 | if (b > 0) checkreg(pt, a + b); | ||
444 | if (c == 0) { | ||
445 | pc++; | ||
446 | check(pc < pt->sizecode - 1); | ||
447 | } | ||
448 | break; | ||
449 | } | ||
450 | case OP_CLOSURE: { | ||
451 | int nup, j; | ||
452 | check(b < pt->sizep); | ||
453 | nup = pt->p[b]->nups; | ||
454 | check(pc + nup < pt->sizecode); | ||
455 | for (j = 1; j <= nup; j++) { | ||
456 | OpCode op1 = GET_OPCODE(pt->code[pc + j]); | ||
457 | check(op1 == OP_GETUPVAL || op1 == OP_MOVE); | ||
458 | } | ||
459 | if (reg != NO_REG) /* tracing? */ | ||
460 | pc += nup; /* do not 'execute' these pseudo-instructions */ | ||
461 | break; | ||
462 | } | ||
463 | case OP_VARARG: { | ||
464 | check((pt->is_vararg & VARARG_ISVARARG) && | ||
465 | !(pt->is_vararg & VARARG_NEEDSARG)); | ||
466 | b--; | ||
467 | if (b == LUA_MULTRET) check(checkopenop(pt, pc)); | ||
468 | checkreg(pt, a+b-1); | ||
469 | break; | ||
470 | } | ||
471 | default: break; | ||
472 | } | ||
473 | } | ||
474 | return pt->code[last]; | ||
475 | } | ||
476 | |||
477 | #undef check | ||
478 | #undef checkjump | ||
479 | #undef checkreg | ||
480 | |||
481 | /* }====================================================== */ | ||
482 | |||
483 | |||
484 | int luaG_checkcode (const Proto *pt) { | ||
485 | return (symbexec(pt, pt->sizecode, NO_REG) != 0); | ||
486 | } | ||
487 | |||
488 | |||
489 | static const char *kname (Proto *p, int c) { | ||
490 | if (ISK(c) && ttisstring(&p->k[INDEXK(c)])) | ||
491 | return svalue(&p->k[INDEXK(c)]); | ||
492 | else | ||
493 | return "?"; | ||
494 | } | ||
495 | |||
496 | |||
497 | static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos, | ||
498 | const char **name) { | ||
499 | if (isLua(ci)) { /* a Lua function? */ | ||
500 | Proto *p = ci_func(ci)->l.p; | ||
501 | int pc = currentpc(L, ci); | ||
502 | Instruction i; | ||
503 | *name = luaF_getlocalname(p, stackpos+1, pc); | ||
504 | if (*name) /* is a local? */ | ||
505 | return "local"; | ||
506 | i = symbexec(p, pc, stackpos); /* try symbolic execution */ | ||
507 | lua_assert(pc != -1); | ||
508 | switch (GET_OPCODE(i)) { | ||
509 | case OP_GETGLOBAL: { | ||
510 | int g = GETARG_Bx(i); /* global index */ | ||
511 | lua_assert(ttisstring(&p->k[g])); | ||
512 | *name = svalue(&p->k[g]); | ||
513 | return "global"; | ||
514 | } | ||
515 | case OP_MOVE: { | ||
516 | int a = GETARG_A(i); | ||
517 | int b = GETARG_B(i); /* move from `b' to `a' */ | ||
518 | if (b < a) | ||
519 | return getobjname(L, ci, b, name); /* get name for `b' */ | ||
520 | break; | ||
521 | } | ||
522 | case OP_GETTABLE: { | ||
523 | int k = GETARG_C(i); /* key index */ | ||
524 | *name = kname(p, k); | ||
525 | return "field"; | ||
526 | } | ||
527 | case OP_GETUPVAL: { | ||
528 | int u = GETARG_B(i); /* upvalue index */ | ||
529 | *name = p->upvalues ? getstr(p->upvalues[u]) : "?"; | ||
530 | return "upvalue"; | ||
531 | } | ||
532 | case OP_SELF: { | ||
533 | int k = GETARG_C(i); /* key index */ | ||
534 | *name = kname(p, k); | ||
535 | return "method"; | ||
536 | } | ||
537 | default: break; | ||
538 | } | ||
539 | } | ||
540 | return NULL; /* no useful name found */ | ||
541 | } | ||
542 | |||
543 | |||
544 | static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) { | ||
545 | Instruction i; | ||
546 | if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1)) | ||
547 | return NULL; /* calling function is not Lua (or is unknown) */ | ||
548 | ci--; /* calling function */ | ||
549 | i = ci_func(ci)->l.p->code[currentpc(L, ci)]; | ||
550 | if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL || | ||
551 | GET_OPCODE(i) == OP_TFORLOOP) | ||
552 | return getobjname(L, ci, GETARG_A(i), name); | ||
553 | else | ||
554 | return NULL; /* no useful name can be found */ | ||
555 | } | ||
556 | |||
557 | |||
558 | /* only ANSI way to check whether a pointer points to an array */ | ||
559 | static int isinstack (CallInfo *ci, const TValue *o) { | ||
560 | StkId p; | ||
561 | for (p = ci->base; p < ci->top; p++) | ||
562 | if (o == p) return 1; | ||
563 | return 0; | ||
564 | } | ||
565 | |||
566 | |||
567 | void luaG_typeerror (lua_State *L, const TValue *o, const char *op) { | ||
568 | const char *name = NULL; | ||
569 | const char *t = luaT_typenames[ttype(o)]; | ||
570 | const char *kind = (isinstack(L->ci, o)) ? | ||
571 | getobjname(L, L->ci, cast_int(o - L->base), &name) : | ||
572 | NULL; | ||
573 | if (kind) | ||
574 | luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)", | ||
575 | op, kind, name, t); | ||
576 | else | ||
577 | luaG_runerror(L, "attempt to %s a %s value", op, t); | ||
578 | } | ||
579 | |||
580 | |||
581 | void luaG_concaterror (lua_State *L, StkId p1, StkId p2) { | ||
582 | if (ttisstring(p1) || ttisnumber(p1)) p1 = p2; | ||
583 | lua_assert(!ttisstring(p1) && !ttisnumber(p1)); | ||
584 | luaG_typeerror(L, p1, "concatenate"); | ||
585 | } | ||
586 | |||
587 | |||
588 | void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) { | ||
589 | TValue temp; | ||
590 | if (luaV_tonumber(p1, &temp) == NULL) | ||
591 | p2 = p1; /* first operand is wrong */ | ||
592 | luaG_typeerror(L, p2, "perform arithmetic on"); | ||
593 | } | ||
594 | |||
595 | |||
596 | int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) { | ||
597 | const char *t1 = luaT_typenames[ttype(p1)]; | ||
598 | const char *t2 = luaT_typenames[ttype(p2)]; | ||
599 | if (t1[2] == t2[2]) | ||
600 | luaG_runerror(L, "attempt to compare two %s values", t1); | ||
601 | else | ||
602 | luaG_runerror(L, "attempt to compare %s with %s", t1, t2); | ||
603 | return 0; | ||
604 | } | ||
605 | |||
606 | |||
607 | static void addinfo (lua_State *L, const char *msg) { | ||
608 | CallInfo *ci = L->ci; | ||
609 | if (isLua(ci)) { /* is Lua code? */ | ||
610 | char buff[LUA_IDSIZE]; /* add file:line information */ | ||
611 | int line = currentline(L, ci); | ||
612 | luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE); | ||
613 | luaO_pushfstring(L, "%s:%d: %s", buff, line, msg); | ||
614 | } | ||
615 | } | ||
616 | |||
617 | |||
618 | void luaG_errormsg (lua_State *L) { | ||
619 | if (L->errfunc != 0) { /* is there an error handling function? */ | ||
620 | StkId errfunc = restorestack(L, L->errfunc); | ||
621 | if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR); | ||
622 | setobjs2s(L, L->top, L->top - 1); /* move argument */ | ||
623 | setobjs2s(L, L->top - 1, errfunc); /* push function */ | ||
624 | incr_top(L); | ||
625 | luaD_call(L, L->top - 2, 1); /* call it */ | ||
626 | } | ||
627 | luaD_throw(L, LUA_ERRRUN); | ||
628 | } | ||
629 | |||
630 | |||
631 | void luaG_runerror (lua_State *L, const char *fmt, ...) { | ||
632 | va_list argp; | ||
633 | va_start(argp, fmt); | ||
634 | addinfo(L, luaO_pushvfstring(L, fmt, argp)); | ||
635 | va_end(argp); | ||
636 | luaG_errormsg(L); | ||
637 | } | ||
638 | |||
diff --git a/apps/plugins/lua/ldebug.h b/apps/plugins/lua/ldebug.h new file mode 100644 index 0000000000..22226b4096 --- /dev/null +++ b/apps/plugins/lua/ldebug.h | |||
@@ -0,0 +1,33 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Auxiliary functions from Debug Interface module | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef ldebug_h | ||
8 | #define ldebug_h | ||
9 | |||
10 | |||
11 | #include "lstate.h" | ||
12 | |||
13 | |||
14 | #define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1) | ||
15 | |||
16 | #define getline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : 0) | ||
17 | |||
18 | #define resethookcount(L) (L->hookcount = L->basehookcount) | ||
19 | |||
20 | |||
21 | LUAI_FUNC void luaG_typeerror (lua_State *L, const TValue *o, | ||
22 | const char *opname); | ||
23 | LUAI_FUNC void luaG_concaterror (lua_State *L, StkId p1, StkId p2); | ||
24 | LUAI_FUNC void luaG_aritherror (lua_State *L, const TValue *p1, | ||
25 | const TValue *p2); | ||
26 | LUAI_FUNC int luaG_ordererror (lua_State *L, const TValue *p1, | ||
27 | const TValue *p2); | ||
28 | LUAI_FUNC void luaG_runerror (lua_State *L, const char *fmt, ...); | ||
29 | LUAI_FUNC void luaG_errormsg (lua_State *L); | ||
30 | LUAI_FUNC int luaG_checkcode (const Proto *pt); | ||
31 | LUAI_FUNC int luaG_checkopenop (Instruction i); | ||
32 | |||
33 | #endif | ||
diff --git a/apps/plugins/lua/ldo.c b/apps/plugins/lua/ldo.c new file mode 100644 index 0000000000..f303c744c7 --- /dev/null +++ b/apps/plugins/lua/ldo.c | |||
@@ -0,0 +1,518 @@ | |||
1 | /* | ||
2 | ** $Id: ldo.c,v 2.38.1.3 2008/01/18 22:31:22 roberto Exp $ | ||
3 | ** Stack and Call structure of Lua | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | /* #include <setjmp.h> */ | ||
9 | #include <stdlib.h> | ||
10 | #include <string.h> | ||
11 | |||
12 | #define ldo_c | ||
13 | #define LUA_CORE | ||
14 | |||
15 | #include "lua.h" | ||
16 | |||
17 | #include "ldebug.h" | ||
18 | #include "ldo.h" | ||
19 | #include "lfunc.h" | ||
20 | #include "lgc.h" | ||
21 | #include "lmem.h" | ||
22 | #include "lobject.h" | ||
23 | #include "lopcodes.h" | ||
24 | #include "lparser.h" | ||
25 | #include "lstate.h" | ||
26 | #include "lstring.h" | ||
27 | #include "ltable.h" | ||
28 | #include "ltm.h" | ||
29 | #include "lundump.h" | ||
30 | #include "lvm.h" | ||
31 | #include "lzio.h" | ||
32 | |||
33 | |||
34 | |||
35 | |||
36 | /* | ||
37 | ** {====================================================== | ||
38 | ** Error-recovery functions | ||
39 | ** ======================================================= | ||
40 | */ | ||
41 | |||
42 | |||
43 | /* chain list of long jump buffers */ | ||
44 | struct lua_longjmp { | ||
45 | struct lua_longjmp *previous; | ||
46 | luai_jmpbuf b; | ||
47 | volatile int status; /* error code */ | ||
48 | }; | ||
49 | |||
50 | |||
51 | void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop) { | ||
52 | switch (errcode) { | ||
53 | case LUA_ERRMEM: { | ||
54 | setsvalue2s(L, oldtop, luaS_newliteral(L, MEMERRMSG)); | ||
55 | break; | ||
56 | } | ||
57 | case LUA_ERRERR: { | ||
58 | setsvalue2s(L, oldtop, luaS_newliteral(L, "error in error handling")); | ||
59 | break; | ||
60 | } | ||
61 | case LUA_ERRSYNTAX: | ||
62 | case LUA_ERRRUN: { | ||
63 | setobjs2s(L, oldtop, L->top - 1); /* error message on current top */ | ||
64 | break; | ||
65 | } | ||
66 | } | ||
67 | L->top = oldtop + 1; | ||
68 | } | ||
69 | |||
70 | |||
71 | static void restore_stack_limit (lua_State *L) { | ||
72 | lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1); | ||
73 | if (L->size_ci > LUAI_MAXCALLS) { /* there was an overflow? */ | ||
74 | int inuse = cast_int(L->ci - L->base_ci); | ||
75 | if (inuse + 1 < LUAI_MAXCALLS) /* can `undo' overflow? */ | ||
76 | luaD_reallocCI(L, LUAI_MAXCALLS); | ||
77 | } | ||
78 | } | ||
79 | |||
80 | |||
81 | static void resetstack (lua_State *L, int status) { | ||
82 | L->ci = L->base_ci; | ||
83 | L->base = L->ci->base; | ||
84 | luaF_close(L, L->base); /* close eventual pending closures */ | ||
85 | luaD_seterrorobj(L, status, L->base); | ||
86 | L->nCcalls = L->baseCcalls; | ||
87 | L->allowhook = 1; | ||
88 | restore_stack_limit(L); | ||
89 | L->errfunc = 0; | ||
90 | L->errorJmp = NULL; | ||
91 | } | ||
92 | |||
93 | |||
94 | void luaD_throw (lua_State *L, int errcode) { | ||
95 | if (L->errorJmp) { | ||
96 | L->errorJmp->status = errcode; | ||
97 | LUAI_THROW(L, L->errorJmp); | ||
98 | } | ||
99 | else { | ||
100 | L->status = cast_byte(errcode); | ||
101 | if (G(L)->panic) { | ||
102 | resetstack(L, errcode); | ||
103 | lua_unlock(L); | ||
104 | G(L)->panic(L); | ||
105 | } | ||
106 | exit(EXIT_FAILURE); | ||
107 | } | ||
108 | } | ||
109 | |||
110 | |||
111 | int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) { | ||
112 | struct lua_longjmp lj; | ||
113 | lj.status = 0; | ||
114 | lj.previous = L->errorJmp; /* chain new error handler */ | ||
115 | L->errorJmp = &lj; | ||
116 | LUAI_TRY(L, &lj, | ||
117 | (*f)(L, ud); | ||
118 | ); | ||
119 | L->errorJmp = lj.previous; /* restore old error handler */ | ||
120 | return lj.status; | ||
121 | } | ||
122 | |||
123 | /* }====================================================== */ | ||
124 | |||
125 | |||
126 | static void correctstack (lua_State *L, TValue *oldstack) { | ||
127 | CallInfo *ci; | ||
128 | GCObject *up; | ||
129 | L->top = (L->top - oldstack) + L->stack; | ||
130 | for (up = L->openupval; up != NULL; up = up->gch.next) | ||
131 | gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack; | ||
132 | for (ci = L->base_ci; ci <= L->ci; ci++) { | ||
133 | ci->top = (ci->top - oldstack) + L->stack; | ||
134 | ci->base = (ci->base - oldstack) + L->stack; | ||
135 | ci->func = (ci->func - oldstack) + L->stack; | ||
136 | } | ||
137 | L->base = (L->base - oldstack) + L->stack; | ||
138 | } | ||
139 | |||
140 | |||
141 | void luaD_reallocstack (lua_State *L, int newsize) { | ||
142 | TValue *oldstack = L->stack; | ||
143 | int realsize = newsize + 1 + EXTRA_STACK; | ||
144 | lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1); | ||
145 | luaM_reallocvector(L, L->stack, L->stacksize, realsize, TValue); | ||
146 | L->stacksize = realsize; | ||
147 | L->stack_last = L->stack+newsize; | ||
148 | correctstack(L, oldstack); | ||
149 | } | ||
150 | |||
151 | |||
152 | void luaD_reallocCI (lua_State *L, int newsize) { | ||
153 | CallInfo *oldci = L->base_ci; | ||
154 | luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo); | ||
155 | L->size_ci = newsize; | ||
156 | L->ci = (L->ci - oldci) + L->base_ci; | ||
157 | L->end_ci = L->base_ci + L->size_ci - 1; | ||
158 | } | ||
159 | |||
160 | |||
161 | void luaD_growstack (lua_State *L, int n) { | ||
162 | if (n <= L->stacksize) /* double size is enough? */ | ||
163 | luaD_reallocstack(L, 2*L->stacksize); | ||
164 | else | ||
165 | luaD_reallocstack(L, L->stacksize + n); | ||
166 | } | ||
167 | |||
168 | |||
169 | static CallInfo *growCI (lua_State *L) { | ||
170 | if (L->size_ci > LUAI_MAXCALLS) /* overflow while handling overflow? */ | ||
171 | luaD_throw(L, LUA_ERRERR); | ||
172 | else { | ||
173 | luaD_reallocCI(L, 2*L->size_ci); | ||
174 | if (L->size_ci > LUAI_MAXCALLS) | ||
175 | luaG_runerror(L, "stack overflow"); | ||
176 | } | ||
177 | return ++L->ci; | ||
178 | } | ||
179 | |||
180 | |||
181 | void luaD_callhook (lua_State *L, int event, int line) { | ||
182 | lua_Hook hook = L->hook; | ||
183 | if (hook && L->allowhook) { | ||
184 | ptrdiff_t top = savestack(L, L->top); | ||
185 | ptrdiff_t ci_top = savestack(L, L->ci->top); | ||
186 | lua_Debug ar; | ||
187 | ar.event = event; | ||
188 | ar.currentline = line; | ||
189 | if (event == LUA_HOOKTAILRET) | ||
190 | ar.i_ci = 0; /* tail call; no debug information about it */ | ||
191 | else | ||
192 | ar.i_ci = cast_int(L->ci - L->base_ci); | ||
193 | luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */ | ||
194 | L->ci->top = L->top + LUA_MINSTACK; | ||
195 | lua_assert(L->ci->top <= L->stack_last); | ||
196 | L->allowhook = 0; /* cannot call hooks inside a hook */ | ||
197 | lua_unlock(L); | ||
198 | (*hook)(L, &ar); | ||
199 | lua_lock(L); | ||
200 | lua_assert(!L->allowhook); | ||
201 | L->allowhook = 1; | ||
202 | L->ci->top = restorestack(L, ci_top); | ||
203 | L->top = restorestack(L, top); | ||
204 | } | ||
205 | } | ||
206 | |||
207 | |||
208 | static StkId adjust_varargs (lua_State *L, Proto *p, int actual) { | ||
209 | int i; | ||
210 | int nfixargs = p->numparams; | ||
211 | Table *htab = NULL; | ||
212 | StkId base, fixed; | ||
213 | for (; actual < nfixargs; ++actual) | ||
214 | setnilvalue(L->top++); | ||
215 | #if defined(LUA_COMPAT_VARARG) | ||
216 | if (p->is_vararg & VARARG_NEEDSARG) { /* compat. with old-style vararg? */ | ||
217 | int nvar = actual - nfixargs; /* number of extra arguments */ | ||
218 | lua_assert(p->is_vararg & VARARG_HASARG); | ||
219 | luaC_checkGC(L); | ||
220 | htab = luaH_new(L, nvar, 1); /* create `arg' table */ | ||
221 | for (i=0; i<nvar; i++) /* put extra arguments into `arg' table */ | ||
222 | setobj2n(L, luaH_setnum(L, htab, i+1), L->top - nvar + i); | ||
223 | /* store counter in field `n' */ | ||
224 | setnvalue(luaH_setstr(L, htab, luaS_newliteral(L, "n")), cast_num(nvar)); | ||
225 | } | ||
226 | #endif | ||
227 | /* move fixed parameters to final position */ | ||
228 | fixed = L->top - actual; /* first fixed argument */ | ||
229 | base = L->top; /* final position of first argument */ | ||
230 | for (i=0; i<nfixargs; i++) { | ||
231 | setobjs2s(L, L->top++, fixed+i); | ||
232 | setnilvalue(fixed+i); | ||
233 | } | ||
234 | /* add `arg' parameter */ | ||
235 | if (htab) { | ||
236 | sethvalue(L, L->top++, htab); | ||
237 | lua_assert(iswhite(obj2gco(htab))); | ||
238 | } | ||
239 | return base; | ||
240 | } | ||
241 | |||
242 | |||
243 | static StkId tryfuncTM (lua_State *L, StkId func) { | ||
244 | const TValue *tm = luaT_gettmbyobj(L, func, TM_CALL); | ||
245 | StkId p; | ||
246 | ptrdiff_t funcr = savestack(L, func); | ||
247 | if (!ttisfunction(tm)) | ||
248 | luaG_typeerror(L, func, "call"); | ||
249 | /* Open a hole inside the stack at `func' */ | ||
250 | for (p = L->top; p > func; p--) setobjs2s(L, p, p-1); | ||
251 | incr_top(L); | ||
252 | func = restorestack(L, funcr); /* previous call may change stack */ | ||
253 | setobj2s(L, func, tm); /* tag method is the new function to be called */ | ||
254 | return func; | ||
255 | } | ||
256 | |||
257 | |||
258 | |||
259 | #define inc_ci(L) \ | ||
260 | ((L->ci == L->end_ci) ? growCI(L) : \ | ||
261 | (condhardstacktests(luaD_reallocCI(L, L->size_ci)), ++L->ci)) | ||
262 | |||
263 | |||
264 | int luaD_precall (lua_State *L, StkId func, int nresults) { | ||
265 | LClosure *cl; | ||
266 | ptrdiff_t funcr; | ||
267 | if (!ttisfunction(func)) /* `func' is not a function? */ | ||
268 | func = tryfuncTM(L, func); /* check the `function' tag method */ | ||
269 | funcr = savestack(L, func); | ||
270 | cl = &clvalue(func)->l; | ||
271 | L->ci->savedpc = L->savedpc; | ||
272 | if (!cl->isC) { /* Lua function? prepare its call */ | ||
273 | CallInfo *ci; | ||
274 | StkId st, base; | ||
275 | Proto *p = cl->p; | ||
276 | luaD_checkstack(L, p->maxstacksize); | ||
277 | func = restorestack(L, funcr); | ||
278 | if (!p->is_vararg) { /* no varargs? */ | ||
279 | base = func + 1; | ||
280 | if (L->top > base + p->numparams) | ||
281 | L->top = base + p->numparams; | ||
282 | } | ||
283 | else { /* vararg function */ | ||
284 | int nargs = cast_int(L->top - func) - 1; | ||
285 | base = adjust_varargs(L, p, nargs); | ||
286 | func = restorestack(L, funcr); /* previous call may change the stack */ | ||
287 | } | ||
288 | ci = inc_ci(L); /* now `enter' new function */ | ||
289 | ci->func = func; | ||
290 | L->base = ci->base = base; | ||
291 | ci->top = L->base + p->maxstacksize; | ||
292 | lua_assert(ci->top <= L->stack_last); | ||
293 | L->savedpc = p->code; /* starting point */ | ||
294 | ci->tailcalls = 0; | ||
295 | ci->nresults = nresults; | ||
296 | for (st = L->top; st < ci->top; st++) | ||
297 | setnilvalue(st); | ||
298 | L->top = ci->top; | ||
299 | if (L->hookmask & LUA_MASKCALL) { | ||
300 | L->savedpc++; /* hooks assume 'pc' is already incremented */ | ||
301 | luaD_callhook(L, LUA_HOOKCALL, -1); | ||
302 | L->savedpc--; /* correct 'pc' */ | ||
303 | } | ||
304 | return PCRLUA; | ||
305 | } | ||
306 | else { /* if is a C function, call it */ | ||
307 | CallInfo *ci; | ||
308 | int n; | ||
309 | luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */ | ||
310 | ci = inc_ci(L); /* now `enter' new function */ | ||
311 | ci->func = restorestack(L, funcr); | ||
312 | L->base = ci->base = ci->func + 1; | ||
313 | ci->top = L->top + LUA_MINSTACK; | ||
314 | lua_assert(ci->top <= L->stack_last); | ||
315 | ci->nresults = nresults; | ||
316 | if (L->hookmask & LUA_MASKCALL) | ||
317 | luaD_callhook(L, LUA_HOOKCALL, -1); | ||
318 | lua_unlock(L); | ||
319 | n = (*curr_func(L)->c.f)(L); /* do the actual call */ | ||
320 | lua_lock(L); | ||
321 | if (n < 0) /* yielding? */ | ||
322 | return PCRYIELD; | ||
323 | else { | ||
324 | luaD_poscall(L, L->top - n); | ||
325 | return PCRC; | ||
326 | } | ||
327 | } | ||
328 | } | ||
329 | |||
330 | |||
331 | static StkId callrethooks (lua_State *L, StkId firstResult) { | ||
332 | ptrdiff_t fr = savestack(L, firstResult); /* next call may change stack */ | ||
333 | luaD_callhook(L, LUA_HOOKRET, -1); | ||
334 | if (f_isLua(L->ci)) { /* Lua function? */ | ||
335 | while ((L->hookmask & LUA_MASKRET) && L->ci->tailcalls--) /* tail calls */ | ||
336 | luaD_callhook(L, LUA_HOOKTAILRET, -1); | ||
337 | } | ||
338 | return restorestack(L, fr); | ||
339 | } | ||
340 | |||
341 | |||
342 | int luaD_poscall (lua_State *L, StkId firstResult) { | ||
343 | StkId res; | ||
344 | int wanted, i; | ||
345 | CallInfo *ci; | ||
346 | if (L->hookmask & LUA_MASKRET) | ||
347 | firstResult = callrethooks(L, firstResult); | ||
348 | ci = L->ci--; | ||
349 | res = ci->func; /* res == final position of 1st result */ | ||
350 | wanted = ci->nresults; | ||
351 | L->base = (ci - 1)->base; /* restore base */ | ||
352 | L->savedpc = (ci - 1)->savedpc; /* restore savedpc */ | ||
353 | /* move results to correct place */ | ||
354 | for (i = wanted; i != 0 && firstResult < L->top; i--) | ||
355 | setobjs2s(L, res++, firstResult++); | ||
356 | while (i-- > 0) | ||
357 | setnilvalue(res++); | ||
358 | L->top = res; | ||
359 | return (wanted - LUA_MULTRET); /* 0 iff wanted == LUA_MULTRET */ | ||
360 | } | ||
361 | |||
362 | |||
363 | /* | ||
364 | ** Call a function (C or Lua). The function to be called is at *func. | ||
365 | ** The arguments are on the stack, right after the function. | ||
366 | ** When returns, all the results are on the stack, starting at the original | ||
367 | ** function position. | ||
368 | */ | ||
369 | void luaD_call (lua_State *L, StkId func, int nResults) { | ||
370 | if (++L->nCcalls >= LUAI_MAXCCALLS) { | ||
371 | if (L->nCcalls == LUAI_MAXCCALLS) | ||
372 | luaG_runerror(L, "C stack overflow"); | ||
373 | else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3))) | ||
374 | luaD_throw(L, LUA_ERRERR); /* error while handing stack error */ | ||
375 | } | ||
376 | if (luaD_precall(L, func, nResults) == PCRLUA) /* is a Lua function? */ | ||
377 | luaV_execute(L, 1); /* call it */ | ||
378 | L->nCcalls--; | ||
379 | luaC_checkGC(L); | ||
380 | } | ||
381 | |||
382 | |||
383 | static void resume (lua_State *L, void *ud) { | ||
384 | StkId firstArg = cast(StkId, ud); | ||
385 | CallInfo *ci = L->ci; | ||
386 | if (L->status == 0) { /* start coroutine? */ | ||
387 | lua_assert(ci == L->base_ci && firstArg > L->base); | ||
388 | if (luaD_precall(L, firstArg - 1, LUA_MULTRET) != PCRLUA) | ||
389 | return; | ||
390 | } | ||
391 | else { /* resuming from previous yield */ | ||
392 | lua_assert(L->status == LUA_YIELD); | ||
393 | L->status = 0; | ||
394 | if (!f_isLua(ci)) { /* `common' yield? */ | ||
395 | /* finish interrupted execution of `OP_CALL' */ | ||
396 | lua_assert(GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_CALL || | ||
397 | GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_TAILCALL); | ||
398 | if (luaD_poscall(L, firstArg)) /* complete it... */ | ||
399 | L->top = L->ci->top; /* and correct top if not multiple results */ | ||
400 | } | ||
401 | else /* yielded inside a hook: just continue its execution */ | ||
402 | L->base = L->ci->base; | ||
403 | } | ||
404 | luaV_execute(L, cast_int(L->ci - L->base_ci)); | ||
405 | } | ||
406 | |||
407 | |||
408 | static int resume_error (lua_State *L, const char *msg) { | ||
409 | L->top = L->ci->base; | ||
410 | setsvalue2s(L, L->top, luaS_new(L, msg)); | ||
411 | incr_top(L); | ||
412 | lua_unlock(L); | ||
413 | return LUA_ERRRUN; | ||
414 | } | ||
415 | |||
416 | |||
417 | LUA_API int lua_resume (lua_State *L, int nargs) { | ||
418 | int status; | ||
419 | lua_lock(L); | ||
420 | if (L->status != LUA_YIELD && (L->status != 0 || L->ci != L->base_ci)) | ||
421 | return resume_error(L, "cannot resume non-suspended coroutine"); | ||
422 | if (L->nCcalls >= LUAI_MAXCCALLS) | ||
423 | return resume_error(L, "C stack overflow"); | ||
424 | luai_userstateresume(L, nargs); | ||
425 | lua_assert(L->errfunc == 0); | ||
426 | L->baseCcalls = ++L->nCcalls; | ||
427 | status = luaD_rawrunprotected(L, resume, L->top - nargs); | ||
428 | if (status != 0) { /* error? */ | ||
429 | L->status = cast_byte(status); /* mark thread as `dead' */ | ||
430 | luaD_seterrorobj(L, status, L->top); | ||
431 | L->ci->top = L->top; | ||
432 | } | ||
433 | else { | ||
434 | lua_assert(L->nCcalls == L->baseCcalls); | ||
435 | status = L->status; | ||
436 | } | ||
437 | --L->nCcalls; | ||
438 | lua_unlock(L); | ||
439 | return status; | ||
440 | } | ||
441 | |||
442 | |||
443 | LUA_API int lua_yield (lua_State *L, int nresults) { | ||
444 | luai_userstateyield(L, nresults); | ||
445 | lua_lock(L); | ||
446 | if (L->nCcalls > L->baseCcalls) | ||
447 | luaG_runerror(L, "attempt to yield across metamethod/C-call boundary"); | ||
448 | L->base = L->top - nresults; /* protect stack slots below */ | ||
449 | L->status = LUA_YIELD; | ||
450 | lua_unlock(L); | ||
451 | return -1; | ||
452 | } | ||
453 | |||
454 | |||
455 | int luaD_pcall (lua_State *L, Pfunc func, void *u, | ||
456 | ptrdiff_t old_top, ptrdiff_t ef) { | ||
457 | int status; | ||
458 | unsigned short oldnCcalls = L->nCcalls; | ||
459 | ptrdiff_t old_ci = saveci(L, L->ci); | ||
460 | lu_byte old_allowhooks = L->allowhook; | ||
461 | ptrdiff_t old_errfunc = L->errfunc; | ||
462 | L->errfunc = ef; | ||
463 | status = luaD_rawrunprotected(L, func, u); | ||
464 | if (status != 0) { /* an error occurred? */ | ||
465 | StkId oldtop = restorestack(L, old_top); | ||
466 | luaF_close(L, oldtop); /* close eventual pending closures */ | ||
467 | luaD_seterrorobj(L, status, oldtop); | ||
468 | L->nCcalls = oldnCcalls; | ||
469 | L->ci = restoreci(L, old_ci); | ||
470 | L->base = L->ci->base; | ||
471 | L->savedpc = L->ci->savedpc; | ||
472 | L->allowhook = old_allowhooks; | ||
473 | restore_stack_limit(L); | ||
474 | } | ||
475 | L->errfunc = old_errfunc; | ||
476 | return status; | ||
477 | } | ||
478 | |||
479 | |||
480 | |||
481 | /* | ||
482 | ** Execute a protected parser. | ||
483 | */ | ||
484 | struct SParser { /* data to `f_parser' */ | ||
485 | ZIO *z; | ||
486 | Mbuffer buff; /* buffer to be used by the scanner */ | ||
487 | const char *name; | ||
488 | }; | ||
489 | |||
490 | static void f_parser (lua_State *L, void *ud) { | ||
491 | int i; | ||
492 | Proto *tf; | ||
493 | Closure *cl; | ||
494 | struct SParser *p = cast(struct SParser *, ud); | ||
495 | int c = luaZ_lookahead(p->z); | ||
496 | luaC_checkGC(L); | ||
497 | tf = ((c == LUA_SIGNATURE[0]) ? luaU_undump : luaY_parser)(L, p->z, | ||
498 | &p->buff, p->name); | ||
499 | cl = luaF_newLclosure(L, tf->nups, hvalue(gt(L))); | ||
500 | cl->l.p = tf; | ||
501 | for (i = 0; i < tf->nups; i++) /* initialize eventual upvalues */ | ||
502 | cl->l.upvals[i] = luaF_newupval(L); | ||
503 | setclvalue(L, L->top, cl); | ||
504 | incr_top(L); | ||
505 | } | ||
506 | |||
507 | |||
508 | int luaD_protectedparser (lua_State *L, ZIO *z, const char *name) { | ||
509 | struct SParser p; | ||
510 | int status; | ||
511 | p.z = z; p.name = name; | ||
512 | luaZ_initbuffer(L, &p.buff); | ||
513 | status = luaD_pcall(L, f_parser, &p, savestack(L, L->top), L->errfunc); | ||
514 | luaZ_freebuffer(L, &p.buff); | ||
515 | return status; | ||
516 | } | ||
517 | |||
518 | |||
diff --git a/apps/plugins/lua/ldo.h b/apps/plugins/lua/ldo.h new file mode 100644 index 0000000000..4c97134805 --- /dev/null +++ b/apps/plugins/lua/ldo.h | |||
@@ -0,0 +1,57 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Stack and Call structure of Lua | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef ldo_h | ||
8 | #define ldo_h | ||
9 | |||
10 | |||
11 | #include "lobject.h" | ||
12 | #include "lstate.h" | ||
13 | #include "lzio.h" | ||
14 | |||
15 | |||
16 | #define luaD_checkstack(L,n) \ | ||
17 | if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \ | ||
18 | luaD_growstack(L, n); \ | ||
19 | else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); | ||
20 | |||
21 | |||
22 | #define incr_top(L) {luaD_checkstack(L,1); L->top++;} | ||
23 | |||
24 | #define savestack(L,p) ((char *)(p) - (char *)L->stack) | ||
25 | #define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) | ||
26 | |||
27 | #define saveci(L,p) ((char *)(p) - (char *)L->base_ci) | ||
28 | #define restoreci(L,n) ((CallInfo *)((char *)L->base_ci + (n))) | ||
29 | |||
30 | |||
31 | /* results from luaD_precall */ | ||
32 | #define PCRLUA 0 /* initiated a call to a Lua function */ | ||
33 | #define PCRC 1 /* did a call to a C function */ | ||
34 | #define PCRYIELD 2 /* C funtion yielded */ | ||
35 | |||
36 | |||
37 | /* type of protected functions, to be ran by `runprotected' */ | ||
38 | typedef void (*Pfunc) (lua_State *L, void *ud); | ||
39 | |||
40 | LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name); | ||
41 | LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line); | ||
42 | LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults); | ||
43 | LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults); | ||
44 | LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, | ||
45 | ptrdiff_t oldtop, ptrdiff_t ef); | ||
46 | LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult); | ||
47 | LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize); | ||
48 | LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize); | ||
49 | LUAI_FUNC void luaD_growstack (lua_State *L, int n); | ||
50 | |||
51 | LUAI_FUNC void luaD_throw (lua_State *L, int errcode); | ||
52 | LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); | ||
53 | |||
54 | LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop); | ||
55 | |||
56 | #endif | ||
57 | |||
diff --git a/apps/plugins/lua/ldump.c b/apps/plugins/lua/ldump.c new file mode 100644 index 0000000000..c9d3d4870f --- /dev/null +++ b/apps/plugins/lua/ldump.c | |||
@@ -0,0 +1,164 @@ | |||
1 | /* | ||
2 | ** $Id: ldump.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** save precompiled Lua chunks | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #include <stddef.h> | ||
8 | |||
9 | #define ldump_c | ||
10 | #define LUA_CORE | ||
11 | |||
12 | #include "lua.h" | ||
13 | |||
14 | #include "lobject.h" | ||
15 | #include "lstate.h" | ||
16 | #include "lundump.h" | ||
17 | |||
18 | typedef struct { | ||
19 | lua_State* L; | ||
20 | lua_Writer writer; | ||
21 | void* data; | ||
22 | int strip; | ||
23 | int status; | ||
24 | } DumpState; | ||
25 | |||
26 | #define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D) | ||
27 | #define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D) | ||
28 | |||
29 | static void DumpBlock(const void* b, size_t size, DumpState* D) | ||
30 | { | ||
31 | if (D->status==0) | ||
32 | { | ||
33 | lua_unlock(D->L); | ||
34 | D->status=(*D->writer)(D->L,b,size,D->data); | ||
35 | lua_lock(D->L); | ||
36 | } | ||
37 | } | ||
38 | |||
39 | static void DumpChar(int y, DumpState* D) | ||
40 | { | ||
41 | char x=(char)y; | ||
42 | DumpVar(x,D); | ||
43 | } | ||
44 | |||
45 | static void DumpInt(int x, DumpState* D) | ||
46 | { | ||
47 | DumpVar(x,D); | ||
48 | } | ||
49 | |||
50 | static void DumpNumber(lua_Number x, DumpState* D) | ||
51 | { | ||
52 | DumpVar(x,D); | ||
53 | } | ||
54 | |||
55 | static void DumpVector(const void* b, int n, size_t size, DumpState* D) | ||
56 | { | ||
57 | DumpInt(n,D); | ||
58 | DumpMem(b,n,size,D); | ||
59 | } | ||
60 | |||
61 | static void DumpString(const TString* s, DumpState* D) | ||
62 | { | ||
63 | if (s==NULL || getstr(s)==NULL) | ||
64 | { | ||
65 | size_t size=0; | ||
66 | DumpVar(size,D); | ||
67 | } | ||
68 | else | ||
69 | { | ||
70 | size_t size=s->tsv.len+1; /* include trailing '\0' */ | ||
71 | DumpVar(size,D); | ||
72 | DumpBlock(getstr(s),size,D); | ||
73 | } | ||
74 | } | ||
75 | |||
76 | #define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D) | ||
77 | |||
78 | static void DumpFunction(const Proto* f, const TString* p, DumpState* D); | ||
79 | |||
80 | static void DumpConstants(const Proto* f, DumpState* D) | ||
81 | { | ||
82 | int i,n=f->sizek; | ||
83 | DumpInt(n,D); | ||
84 | for (i=0; i<n; i++) | ||
85 | { | ||
86 | const TValue* o=&f->k[i]; | ||
87 | DumpChar(ttype(o),D); | ||
88 | switch (ttype(o)) | ||
89 | { | ||
90 | case LUA_TNIL: | ||
91 | break; | ||
92 | case LUA_TBOOLEAN: | ||
93 | DumpChar(bvalue(o),D); | ||
94 | break; | ||
95 | case LUA_TNUMBER: | ||
96 | DumpNumber(nvalue(o),D); | ||
97 | break; | ||
98 | case LUA_TSTRING: | ||
99 | DumpString(rawtsvalue(o),D); | ||
100 | break; | ||
101 | default: | ||
102 | lua_assert(0); /* cannot happen */ | ||
103 | break; | ||
104 | } | ||
105 | } | ||
106 | n=f->sizep; | ||
107 | DumpInt(n,D); | ||
108 | for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D); | ||
109 | } | ||
110 | |||
111 | static void DumpDebug(const Proto* f, DumpState* D) | ||
112 | { | ||
113 | int i,n; | ||
114 | n= (D->strip) ? 0 : f->sizelineinfo; | ||
115 | DumpVector(f->lineinfo,n,sizeof(int),D); | ||
116 | n= (D->strip) ? 0 : f->sizelocvars; | ||
117 | DumpInt(n,D); | ||
118 | for (i=0; i<n; i++) | ||
119 | { | ||
120 | DumpString(f->locvars[i].varname,D); | ||
121 | DumpInt(f->locvars[i].startpc,D); | ||
122 | DumpInt(f->locvars[i].endpc,D); | ||
123 | } | ||
124 | n= (D->strip) ? 0 : f->sizeupvalues; | ||
125 | DumpInt(n,D); | ||
126 | for (i=0; i<n; i++) DumpString(f->upvalues[i],D); | ||
127 | } | ||
128 | |||
129 | static void DumpFunction(const Proto* f, const TString* p, DumpState* D) | ||
130 | { | ||
131 | DumpString((f->source==p || D->strip) ? NULL : f->source,D); | ||
132 | DumpInt(f->linedefined,D); | ||
133 | DumpInt(f->lastlinedefined,D); | ||
134 | DumpChar(f->nups,D); | ||
135 | DumpChar(f->numparams,D); | ||
136 | DumpChar(f->is_vararg,D); | ||
137 | DumpChar(f->maxstacksize,D); | ||
138 | DumpCode(f,D); | ||
139 | DumpConstants(f,D); | ||
140 | DumpDebug(f,D); | ||
141 | } | ||
142 | |||
143 | static void DumpHeader(DumpState* D) | ||
144 | { | ||
145 | char h[LUAC_HEADERSIZE]; | ||
146 | luaU_header(h); | ||
147 | DumpBlock(h,LUAC_HEADERSIZE,D); | ||
148 | } | ||
149 | |||
150 | /* | ||
151 | ** dump Lua function as precompiled chunk | ||
152 | */ | ||
153 | int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip) | ||
154 | { | ||
155 | DumpState D; | ||
156 | D.L=L; | ||
157 | D.writer=w; | ||
158 | D.data=data; | ||
159 | D.strip=strip; | ||
160 | D.status=0; | ||
161 | DumpHeader(&D); | ||
162 | DumpFunction(f,NULL,&D); | ||
163 | return D.status; | ||
164 | } | ||
diff --git a/apps/plugins/lua/lfunc.c b/apps/plugins/lua/lfunc.c new file mode 100644 index 0000000000..813e88f583 --- /dev/null +++ b/apps/plugins/lua/lfunc.c | |||
@@ -0,0 +1,174 @@ | |||
1 | /* | ||
2 | ** $Id: lfunc.c,v 2.12.1.2 2007/12/28 14:58:43 roberto Exp $ | ||
3 | ** Auxiliary functions to manipulate prototypes and closures | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stddef.h> | ||
9 | |||
10 | #define lfunc_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "lfunc.h" | ||
16 | #include "lgc.h" | ||
17 | #include "lmem.h" | ||
18 | #include "lobject.h" | ||
19 | #include "lstate.h" | ||
20 | |||
21 | |||
22 | |||
23 | Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e) { | ||
24 | Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems))); | ||
25 | luaC_link(L, obj2gco(c), LUA_TFUNCTION); | ||
26 | c->c.isC = 1; | ||
27 | c->c.env = e; | ||
28 | c->c.nupvalues = cast_byte(nelems); | ||
29 | return c; | ||
30 | } | ||
31 | |||
32 | |||
33 | Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e) { | ||
34 | Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems))); | ||
35 | luaC_link(L, obj2gco(c), LUA_TFUNCTION); | ||
36 | c->l.isC = 0; | ||
37 | c->l.env = e; | ||
38 | c->l.nupvalues = cast_byte(nelems); | ||
39 | while (nelems--) c->l.upvals[nelems] = NULL; | ||
40 | return c; | ||
41 | } | ||
42 | |||
43 | |||
44 | UpVal *luaF_newupval (lua_State *L) { | ||
45 | UpVal *uv = luaM_new(L, UpVal); | ||
46 | luaC_link(L, obj2gco(uv), LUA_TUPVAL); | ||
47 | uv->v = &uv->u.value; | ||
48 | setnilvalue(uv->v); | ||
49 | return uv; | ||
50 | } | ||
51 | |||
52 | |||
53 | UpVal *luaF_findupval (lua_State *L, StkId level) { | ||
54 | global_State *g = G(L); | ||
55 | GCObject **pp = &L->openupval; | ||
56 | UpVal *p; | ||
57 | UpVal *uv; | ||
58 | while (*pp != NULL && (p = ngcotouv(*pp))->v >= level) { | ||
59 | lua_assert(p->v != &p->u.value); | ||
60 | if (p->v == level) { /* found a corresponding upvalue? */ | ||
61 | if (isdead(g, obj2gco(p))) /* is it dead? */ | ||
62 | changewhite(obj2gco(p)); /* ressurect it */ | ||
63 | return p; | ||
64 | } | ||
65 | pp = &p->next; | ||
66 | } | ||
67 | uv = luaM_new(L, UpVal); /* not found: create a new one */ | ||
68 | uv->tt = LUA_TUPVAL; | ||
69 | uv->marked = luaC_white(g); | ||
70 | uv->v = level; /* current value lives in the stack */ | ||
71 | uv->next = *pp; /* chain it in the proper position */ | ||
72 | *pp = obj2gco(uv); | ||
73 | uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */ | ||
74 | uv->u.l.next = g->uvhead.u.l.next; | ||
75 | uv->u.l.next->u.l.prev = uv; | ||
76 | g->uvhead.u.l.next = uv; | ||
77 | lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv); | ||
78 | return uv; | ||
79 | } | ||
80 | |||
81 | |||
82 | static void unlinkupval (UpVal *uv) { | ||
83 | lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv); | ||
84 | uv->u.l.next->u.l.prev = uv->u.l.prev; /* remove from `uvhead' list */ | ||
85 | uv->u.l.prev->u.l.next = uv->u.l.next; | ||
86 | } | ||
87 | |||
88 | |||
89 | void luaF_freeupval (lua_State *L, UpVal *uv) { | ||
90 | if (uv->v != &uv->u.value) /* is it open? */ | ||
91 | unlinkupval(uv); /* remove from open list */ | ||
92 | luaM_free(L, uv); /* free upvalue */ | ||
93 | } | ||
94 | |||
95 | |||
96 | void luaF_close (lua_State *L, StkId level) { | ||
97 | UpVal *uv; | ||
98 | global_State *g = G(L); | ||
99 | while (L->openupval != NULL && (uv = ngcotouv(L->openupval))->v >= level) { | ||
100 | GCObject *o = obj2gco(uv); | ||
101 | lua_assert(!isblack(o) && uv->v != &uv->u.value); | ||
102 | L->openupval = uv->next; /* remove from `open' list */ | ||
103 | if (isdead(g, o)) | ||
104 | luaF_freeupval(L, uv); /* free upvalue */ | ||
105 | else { | ||
106 | unlinkupval(uv); | ||
107 | setobj(L, &uv->u.value, uv->v); | ||
108 | uv->v = &uv->u.value; /* now current value lives here */ | ||
109 | luaC_linkupval(L, uv); /* link upvalue into `gcroot' list */ | ||
110 | } | ||
111 | } | ||
112 | } | ||
113 | |||
114 | |||
115 | Proto *luaF_newproto (lua_State *L) { | ||
116 | Proto *f = luaM_new(L, Proto); | ||
117 | luaC_link(L, obj2gco(f), LUA_TPROTO); | ||
118 | f->k = NULL; | ||
119 | f->sizek = 0; | ||
120 | f->p = NULL; | ||
121 | f->sizep = 0; | ||
122 | f->code = NULL; | ||
123 | f->sizecode = 0; | ||
124 | f->sizelineinfo = 0; | ||
125 | f->sizeupvalues = 0; | ||
126 | f->nups = 0; | ||
127 | f->upvalues = NULL; | ||
128 | f->numparams = 0; | ||
129 | f->is_vararg = 0; | ||
130 | f->maxstacksize = 0; | ||
131 | f->lineinfo = NULL; | ||
132 | f->sizelocvars = 0; | ||
133 | f->locvars = NULL; | ||
134 | f->linedefined = 0; | ||
135 | f->lastlinedefined = 0; | ||
136 | f->source = NULL; | ||
137 | return f; | ||
138 | } | ||
139 | |||
140 | |||
141 | void luaF_freeproto (lua_State *L, Proto *f) { | ||
142 | luaM_freearray(L, f->code, f->sizecode, Instruction); | ||
143 | luaM_freearray(L, f->p, f->sizep, Proto *); | ||
144 | luaM_freearray(L, f->k, f->sizek, TValue); | ||
145 | luaM_freearray(L, f->lineinfo, f->sizelineinfo, int); | ||
146 | luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar); | ||
147 | luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *); | ||
148 | luaM_free(L, f); | ||
149 | } | ||
150 | |||
151 | |||
152 | void luaF_freeclosure (lua_State *L, Closure *c) { | ||
153 | int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) : | ||
154 | sizeLclosure(c->l.nupvalues); | ||
155 | luaM_freemem(L, c, size); | ||
156 | } | ||
157 | |||
158 | |||
159 | /* | ||
160 | ** Look for n-th local variable at line `line' in function `func'. | ||
161 | ** Returns NULL if not found. | ||
162 | */ | ||
163 | const char *luaF_getlocalname (const Proto *f, int local_number, int pc) { | ||
164 | int i; | ||
165 | for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) { | ||
166 | if (pc < f->locvars[i].endpc) { /* is variable active? */ | ||
167 | local_number--; | ||
168 | if (local_number == 0) | ||
169 | return getstr(f->locvars[i].varname); | ||
170 | } | ||
171 | } | ||
172 | return NULL; /* not found */ | ||
173 | } | ||
174 | |||
diff --git a/apps/plugins/lua/lfunc.h b/apps/plugins/lua/lfunc.h new file mode 100644 index 0000000000..4c2b7fd138 --- /dev/null +++ b/apps/plugins/lua/lfunc.h | |||
@@ -0,0 +1,34 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Auxiliary functions to manipulate prototypes and closures | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lfunc_h | ||
8 | #define lfunc_h | ||
9 | |||
10 | |||
11 | #include "lobject.h" | ||
12 | |||
13 | |||
14 | #define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \ | ||
15 | cast(int, sizeof(TValue)*((n)-1))) | ||
16 | |||
17 | #define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \ | ||
18 | cast(int, sizeof(TValue *)*((n)-1))) | ||
19 | |||
20 | |||
21 | LUAI_FUNC Proto *luaF_newproto (lua_State *L); | ||
22 | LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e); | ||
23 | LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e); | ||
24 | LUAI_FUNC UpVal *luaF_newupval (lua_State *L); | ||
25 | LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); | ||
26 | LUAI_FUNC void luaF_close (lua_State *L, StkId level); | ||
27 | LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); | ||
28 | LUAI_FUNC void luaF_freeclosure (lua_State *L, Closure *c); | ||
29 | LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv); | ||
30 | LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, | ||
31 | int pc); | ||
32 | |||
33 | |||
34 | #endif | ||
diff --git a/apps/plugins/lua/lgc.c b/apps/plugins/lua/lgc.c new file mode 100644 index 0000000000..d9e0b78294 --- /dev/null +++ b/apps/plugins/lua/lgc.c | |||
@@ -0,0 +1,711 @@ | |||
1 | /* | ||
2 | ** $Id: lgc.c,v 2.38.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** Garbage Collector | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #include <string.h> | ||
8 | |||
9 | #define lgc_c | ||
10 | #define LUA_CORE | ||
11 | |||
12 | #include "lua.h" | ||
13 | |||
14 | #include "ldebug.h" | ||
15 | #include "ldo.h" | ||
16 | #include "lfunc.h" | ||
17 | #include "lgc.h" | ||
18 | #include "lmem.h" | ||
19 | #include "lobject.h" | ||
20 | #include "lstate.h" | ||
21 | #include "lstring.h" | ||
22 | #include "ltable.h" | ||
23 | #include "ltm.h" | ||
24 | |||
25 | |||
26 | #define GCSTEPSIZE 1024u | ||
27 | #define GCSWEEPMAX 40 | ||
28 | #define GCSWEEPCOST 10 | ||
29 | #define GCFINALIZECOST 100 | ||
30 | |||
31 | |||
32 | #define maskmarks cast_byte(~(bitmask(BLACKBIT)|WHITEBITS)) | ||
33 | |||
34 | #define makewhite(g,x) \ | ||
35 | ((x)->gch.marked = cast_byte(((x)->gch.marked & maskmarks) | luaC_white(g))) | ||
36 | |||
37 | #define white2gray(x) reset2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT) | ||
38 | #define black2gray(x) resetbit((x)->gch.marked, BLACKBIT) | ||
39 | |||
40 | #define stringmark(s) reset2bits((s)->tsv.marked, WHITE0BIT, WHITE1BIT) | ||
41 | |||
42 | |||
43 | #define isfinalized(u) testbit((u)->marked, FINALIZEDBIT) | ||
44 | #define markfinalized(u) l_setbit((u)->marked, FINALIZEDBIT) | ||
45 | |||
46 | |||
47 | #define KEYWEAK bitmask(KEYWEAKBIT) | ||
48 | #define VALUEWEAK bitmask(VALUEWEAKBIT) | ||
49 | |||
50 | |||
51 | |||
52 | #define markvalue(g,o) { checkconsistency(o); \ | ||
53 | if (iscollectable(o) && iswhite(gcvalue(o))) reallymarkobject(g,gcvalue(o)); } | ||
54 | |||
55 | #define markobject(g,t) { if (iswhite(obj2gco(t))) \ | ||
56 | reallymarkobject(g, obj2gco(t)); } | ||
57 | |||
58 | |||
59 | #define setthreshold(g) (g->GCthreshold = (g->estimate/100) * g->gcpause) | ||
60 | |||
61 | |||
62 | static void removeentry (Node *n) { | ||
63 | lua_assert(ttisnil(gval(n))); | ||
64 | if (iscollectable(gkey(n))) | ||
65 | setttype(gkey(n), LUA_TDEADKEY); /* dead key; remove it */ | ||
66 | } | ||
67 | |||
68 | |||
69 | static void reallymarkobject (global_State *g, GCObject *o) { | ||
70 | lua_assert(iswhite(o) && !isdead(g, o)); | ||
71 | white2gray(o); | ||
72 | switch (o->gch.tt) { | ||
73 | case LUA_TSTRING: { | ||
74 | return; | ||
75 | } | ||
76 | case LUA_TUSERDATA: { | ||
77 | Table *mt = gco2u(o)->metatable; | ||
78 | gray2black(o); /* udata are never gray */ | ||
79 | if (mt) markobject(g, mt); | ||
80 | markobject(g, gco2u(o)->env); | ||
81 | return; | ||
82 | } | ||
83 | case LUA_TUPVAL: { | ||
84 | UpVal *uv = gco2uv(o); | ||
85 | markvalue(g, uv->v); | ||
86 | if (uv->v == &uv->u.value) /* closed? */ | ||
87 | gray2black(o); /* open upvalues are never black */ | ||
88 | return; | ||
89 | } | ||
90 | case LUA_TFUNCTION: { | ||
91 | gco2cl(o)->c.gclist = g->gray; | ||
92 | g->gray = o; | ||
93 | break; | ||
94 | } | ||
95 | case LUA_TTABLE: { | ||
96 | gco2h(o)->gclist = g->gray; | ||
97 | g->gray = o; | ||
98 | break; | ||
99 | } | ||
100 | case LUA_TTHREAD: { | ||
101 | gco2th(o)->gclist = g->gray; | ||
102 | g->gray = o; | ||
103 | break; | ||
104 | } | ||
105 | case LUA_TPROTO: { | ||
106 | gco2p(o)->gclist = g->gray; | ||
107 | g->gray = o; | ||
108 | break; | ||
109 | } | ||
110 | default: lua_assert(0); | ||
111 | } | ||
112 | } | ||
113 | |||
114 | |||
115 | static void marktmu (global_State *g) { | ||
116 | GCObject *u = g->tmudata; | ||
117 | if (u) { | ||
118 | do { | ||
119 | u = u->gch.next; | ||
120 | makewhite(g, u); /* may be marked, if left from previous GC */ | ||
121 | reallymarkobject(g, u); | ||
122 | } while (u != g->tmudata); | ||
123 | } | ||
124 | } | ||
125 | |||
126 | |||
127 | /* move `dead' udata that need finalization to list `tmudata' */ | ||
128 | size_t luaC_separateudata (lua_State *L, int all) { | ||
129 | global_State *g = G(L); | ||
130 | size_t deadmem = 0; | ||
131 | GCObject **p = &g->mainthread->next; | ||
132 | GCObject *curr; | ||
133 | while ((curr = *p) != NULL) { | ||
134 | if (!(iswhite(curr) || all) || isfinalized(gco2u(curr))) | ||
135 | p = &curr->gch.next; /* don't bother with them */ | ||
136 | else if (fasttm(L, gco2u(curr)->metatable, TM_GC) == NULL) { | ||
137 | markfinalized(gco2u(curr)); /* don't need finalization */ | ||
138 | p = &curr->gch.next; | ||
139 | } | ||
140 | else { /* must call its gc method */ | ||
141 | deadmem += sizeudata(gco2u(curr)); | ||
142 | markfinalized(gco2u(curr)); | ||
143 | *p = curr->gch.next; | ||
144 | /* link `curr' at the end of `tmudata' list */ | ||
145 | if (g->tmudata == NULL) /* list is empty? */ | ||
146 | g->tmudata = curr->gch.next = curr; /* creates a circular list */ | ||
147 | else { | ||
148 | curr->gch.next = g->tmudata->gch.next; | ||
149 | g->tmudata->gch.next = curr; | ||
150 | g->tmudata = curr; | ||
151 | } | ||
152 | } | ||
153 | } | ||
154 | return deadmem; | ||
155 | } | ||
156 | |||
157 | |||
158 | static int traversetable (global_State *g, Table *h) { | ||
159 | int i; | ||
160 | int weakkey = 0; | ||
161 | int weakvalue = 0; | ||
162 | const TValue *mode; | ||
163 | if (h->metatable) | ||
164 | markobject(g, h->metatable); | ||
165 | mode = gfasttm(g, h->metatable, TM_MODE); | ||
166 | if (mode && ttisstring(mode)) { /* is there a weak mode? */ | ||
167 | weakkey = (strchr(svalue(mode), 'k') != NULL); | ||
168 | weakvalue = (strchr(svalue(mode), 'v') != NULL); | ||
169 | if (weakkey || weakvalue) { /* is really weak? */ | ||
170 | h->marked &= ~(KEYWEAK | VALUEWEAK); /* clear bits */ | ||
171 | h->marked |= cast_byte((weakkey << KEYWEAKBIT) | | ||
172 | (weakvalue << VALUEWEAKBIT)); | ||
173 | h->gclist = g->weak; /* must be cleared after GC, ... */ | ||
174 | g->weak = obj2gco(h); /* ... so put in the appropriate list */ | ||
175 | } | ||
176 | } | ||
177 | if (weakkey && weakvalue) return 1; | ||
178 | if (!weakvalue) { | ||
179 | i = h->sizearray; | ||
180 | while (i--) | ||
181 | markvalue(g, &h->array[i]); | ||
182 | } | ||
183 | i = sizenode(h); | ||
184 | while (i--) { | ||
185 | Node *n = gnode(h, i); | ||
186 | lua_assert(ttype(gkey(n)) != LUA_TDEADKEY || ttisnil(gval(n))); | ||
187 | if (ttisnil(gval(n))) | ||
188 | removeentry(n); /* remove empty entries */ | ||
189 | else { | ||
190 | lua_assert(!ttisnil(gkey(n))); | ||
191 | if (!weakkey) markvalue(g, gkey(n)); | ||
192 | if (!weakvalue) markvalue(g, gval(n)); | ||
193 | } | ||
194 | } | ||
195 | return weakkey || weakvalue; | ||
196 | } | ||
197 | |||
198 | |||
199 | /* | ||
200 | ** All marks are conditional because a GC may happen while the | ||
201 | ** prototype is still being created | ||
202 | */ | ||
203 | static void traverseproto (global_State *g, Proto *f) { | ||
204 | int i; | ||
205 | if (f->source) stringmark(f->source); | ||
206 | for (i=0; i<f->sizek; i++) /* mark literals */ | ||
207 | markvalue(g, &f->k[i]); | ||
208 | for (i=0; i<f->sizeupvalues; i++) { /* mark upvalue names */ | ||
209 | if (f->upvalues[i]) | ||
210 | stringmark(f->upvalues[i]); | ||
211 | } | ||
212 | for (i=0; i<f->sizep; i++) { /* mark nested protos */ | ||
213 | if (f->p[i]) | ||
214 | markobject(g, f->p[i]); | ||
215 | } | ||
216 | for (i=0; i<f->sizelocvars; i++) { /* mark local-variable names */ | ||
217 | if (f->locvars[i].varname) | ||
218 | stringmark(f->locvars[i].varname); | ||
219 | } | ||
220 | } | ||
221 | |||
222 | |||
223 | |||
224 | static void traverseclosure (global_State *g, Closure *cl) { | ||
225 | markobject(g, cl->c.env); | ||
226 | if (cl->c.isC) { | ||
227 | int i; | ||
228 | for (i=0; i<cl->c.nupvalues; i++) /* mark its upvalues */ | ||
229 | markvalue(g, &cl->c.upvalue[i]); | ||
230 | } | ||
231 | else { | ||
232 | int i; | ||
233 | lua_assert(cl->l.nupvalues == cl->l.p->nups); | ||
234 | markobject(g, cl->l.p); | ||
235 | for (i=0; i<cl->l.nupvalues; i++) /* mark its upvalues */ | ||
236 | markobject(g, cl->l.upvals[i]); | ||
237 | } | ||
238 | } | ||
239 | |||
240 | |||
241 | static void checkstacksizes (lua_State *L, StkId max) { | ||
242 | int ci_used = cast_int(L->ci - L->base_ci); /* number of `ci' in use */ | ||
243 | int s_used = cast_int(max - L->stack); /* part of stack in use */ | ||
244 | if (L->size_ci > LUAI_MAXCALLS) /* handling overflow? */ | ||
245 | return; /* do not touch the stacks */ | ||
246 | if (4*ci_used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci) | ||
247 | luaD_reallocCI(L, L->size_ci/2); /* still big enough... */ | ||
248 | condhardstacktests(luaD_reallocCI(L, ci_used + 1)); | ||
249 | if (4*s_used < L->stacksize && | ||
250 | 2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize) | ||
251 | luaD_reallocstack(L, L->stacksize/2); /* still big enough... */ | ||
252 | condhardstacktests(luaD_reallocstack(L, s_used)); | ||
253 | } | ||
254 | |||
255 | |||
256 | static void traversestack (global_State *g, lua_State *l) { | ||
257 | StkId o, lim; | ||
258 | CallInfo *ci; | ||
259 | markvalue(g, gt(l)); | ||
260 | lim = l->top; | ||
261 | for (ci = l->base_ci; ci <= l->ci; ci++) { | ||
262 | lua_assert(ci->top <= l->stack_last); | ||
263 | if (lim < ci->top) lim = ci->top; | ||
264 | } | ||
265 | for (o = l->stack; o < l->top; o++) | ||
266 | markvalue(g, o); | ||
267 | for (; o <= lim; o++) | ||
268 | setnilvalue(o); | ||
269 | checkstacksizes(l, lim); | ||
270 | } | ||
271 | |||
272 | |||
273 | /* | ||
274 | ** traverse one gray object, turning it to black. | ||
275 | ** Returns `quantity' traversed. | ||
276 | */ | ||
277 | static l_mem propagatemark (global_State *g) { | ||
278 | GCObject *o = g->gray; | ||
279 | lua_assert(isgray(o)); | ||
280 | gray2black(o); | ||
281 | switch (o->gch.tt) { | ||
282 | case LUA_TTABLE: { | ||
283 | Table *h = gco2h(o); | ||
284 | g->gray = h->gclist; | ||
285 | if (traversetable(g, h)) /* table is weak? */ | ||
286 | black2gray(o); /* keep it gray */ | ||
287 | return sizeof(Table) + sizeof(TValue) * h->sizearray + | ||
288 | sizeof(Node) * sizenode(h); | ||
289 | } | ||
290 | case LUA_TFUNCTION: { | ||
291 | Closure *cl = gco2cl(o); | ||
292 | g->gray = cl->c.gclist; | ||
293 | traverseclosure(g, cl); | ||
294 | return (cl->c.isC) ? sizeCclosure(cl->c.nupvalues) : | ||
295 | sizeLclosure(cl->l.nupvalues); | ||
296 | } | ||
297 | case LUA_TTHREAD: { | ||
298 | lua_State *th = gco2th(o); | ||
299 | g->gray = th->gclist; | ||
300 | th->gclist = g->grayagain; | ||
301 | g->grayagain = o; | ||
302 | black2gray(o); | ||
303 | traversestack(g, th); | ||
304 | return sizeof(lua_State) + sizeof(TValue) * th->stacksize + | ||
305 | sizeof(CallInfo) * th->size_ci; | ||
306 | } | ||
307 | case LUA_TPROTO: { | ||
308 | Proto *p = gco2p(o); | ||
309 | g->gray = p->gclist; | ||
310 | traverseproto(g, p); | ||
311 | return sizeof(Proto) + sizeof(Instruction) * p->sizecode + | ||
312 | sizeof(Proto *) * p->sizep + | ||
313 | sizeof(TValue) * p->sizek + | ||
314 | sizeof(int) * p->sizelineinfo + | ||
315 | sizeof(LocVar) * p->sizelocvars + | ||
316 | sizeof(TString *) * p->sizeupvalues; | ||
317 | } | ||
318 | default: lua_assert(0); return 0; | ||
319 | } | ||
320 | } | ||
321 | |||
322 | |||
323 | static size_t propagateall (global_State *g) { | ||
324 | size_t m = 0; | ||
325 | while (g->gray) m += propagatemark(g); | ||
326 | return m; | ||
327 | } | ||
328 | |||
329 | |||
330 | /* | ||
331 | ** The next function tells whether a key or value can be cleared from | ||
332 | ** a weak table. Non-collectable objects are never removed from weak | ||
333 | ** tables. Strings behave as `values', so are never removed too. for | ||
334 | ** other objects: if really collected, cannot keep them; for userdata | ||
335 | ** being finalized, keep them in keys, but not in values | ||
336 | */ | ||
337 | static int iscleared (const TValue *o, int iskey) { | ||
338 | if (!iscollectable(o)) return 0; | ||
339 | if (ttisstring(o)) { | ||
340 | stringmark(rawtsvalue(o)); /* strings are `values', so are never weak */ | ||
341 | return 0; | ||
342 | } | ||
343 | return iswhite(gcvalue(o)) || | ||
344 | (ttisuserdata(o) && (!iskey && isfinalized(uvalue(o)))); | ||
345 | } | ||
346 | |||
347 | |||
348 | /* | ||
349 | ** clear collected entries from weaktables | ||
350 | */ | ||
351 | static void cleartable (GCObject *l) { | ||
352 | while (l) { | ||
353 | Table *h = gco2h(l); | ||
354 | int i = h->sizearray; | ||
355 | lua_assert(testbit(h->marked, VALUEWEAKBIT) || | ||
356 | testbit(h->marked, KEYWEAKBIT)); | ||
357 | if (testbit(h->marked, VALUEWEAKBIT)) { | ||
358 | while (i--) { | ||
359 | TValue *o = &h->array[i]; | ||
360 | if (iscleared(o, 0)) /* value was collected? */ | ||
361 | setnilvalue(o); /* remove value */ | ||
362 | } | ||
363 | } | ||
364 | i = sizenode(h); | ||
365 | while (i--) { | ||
366 | Node *n = gnode(h, i); | ||
367 | if (!ttisnil(gval(n)) && /* non-empty entry? */ | ||
368 | (iscleared(key2tval(n), 1) || iscleared(gval(n), 0))) { | ||
369 | setnilvalue(gval(n)); /* remove value ... */ | ||
370 | removeentry(n); /* remove entry from table */ | ||
371 | } | ||
372 | } | ||
373 | l = h->gclist; | ||
374 | } | ||
375 | } | ||
376 | |||
377 | |||
378 | static void freeobj (lua_State *L, GCObject *o) { | ||
379 | switch (o->gch.tt) { | ||
380 | case LUA_TPROTO: luaF_freeproto(L, gco2p(o)); break; | ||
381 | case LUA_TFUNCTION: luaF_freeclosure(L, gco2cl(o)); break; | ||
382 | case LUA_TUPVAL: luaF_freeupval(L, gco2uv(o)); break; | ||
383 | case LUA_TTABLE: luaH_free(L, gco2h(o)); break; | ||
384 | case LUA_TTHREAD: { | ||
385 | lua_assert(gco2th(o) != L && gco2th(o) != G(L)->mainthread); | ||
386 | luaE_freethread(L, gco2th(o)); | ||
387 | break; | ||
388 | } | ||
389 | case LUA_TSTRING: { | ||
390 | G(L)->strt.nuse--; | ||
391 | luaM_freemem(L, o, sizestring(gco2ts(o))); | ||
392 | break; | ||
393 | } | ||
394 | case LUA_TUSERDATA: { | ||
395 | luaM_freemem(L, o, sizeudata(gco2u(o))); | ||
396 | break; | ||
397 | } | ||
398 | default: lua_assert(0); | ||
399 | } | ||
400 | } | ||
401 | |||
402 | |||
403 | |||
404 | #define sweepwholelist(L,p) sweeplist(L,p,MAX_LUMEM) | ||
405 | |||
406 | |||
407 | static GCObject **sweeplist (lua_State *L, GCObject **p, lu_mem count) { | ||
408 | GCObject *curr; | ||
409 | global_State *g = G(L); | ||
410 | int deadmask = otherwhite(g); | ||
411 | while ((curr = *p) != NULL && count-- > 0) { | ||
412 | if (curr->gch.tt == LUA_TTHREAD) /* sweep open upvalues of each thread */ | ||
413 | sweepwholelist(L, &gco2th(curr)->openupval); | ||
414 | if ((curr->gch.marked ^ WHITEBITS) & deadmask) { /* not dead? */ | ||
415 | lua_assert(!isdead(g, curr) || testbit(curr->gch.marked, FIXEDBIT)); | ||
416 | makewhite(g, curr); /* make it white (for next cycle) */ | ||
417 | p = &curr->gch.next; | ||
418 | } | ||
419 | else { /* must erase `curr' */ | ||
420 | lua_assert(isdead(g, curr) || deadmask == bitmask(SFIXEDBIT)); | ||
421 | *p = curr->gch.next; | ||
422 | if (curr == g->rootgc) /* is the first element of the list? */ | ||
423 | g->rootgc = curr->gch.next; /* adjust first */ | ||
424 | freeobj(L, curr); | ||
425 | } | ||
426 | } | ||
427 | return p; | ||
428 | } | ||
429 | |||
430 | |||
431 | static void checkSizes (lua_State *L) { | ||
432 | global_State *g = G(L); | ||
433 | /* check size of string hash */ | ||
434 | if (g->strt.nuse < cast(lu_int32, g->strt.size/4) && | ||
435 | g->strt.size > MINSTRTABSIZE*2) | ||
436 | luaS_resize(L, g->strt.size/2); /* table is too big */ | ||
437 | /* check size of buffer */ | ||
438 | if (luaZ_sizebuffer(&g->buff) > LUA_MINBUFFER*2) { /* buffer too big? */ | ||
439 | size_t newsize = luaZ_sizebuffer(&g->buff) / 2; | ||
440 | luaZ_resizebuffer(L, &g->buff, newsize); | ||
441 | } | ||
442 | } | ||
443 | |||
444 | |||
445 | static void GCTM (lua_State *L) { | ||
446 | global_State *g = G(L); | ||
447 | GCObject *o = g->tmudata->gch.next; /* get first element */ | ||
448 | Udata *udata = rawgco2u(o); | ||
449 | const TValue *tm; | ||
450 | /* remove udata from `tmudata' */ | ||
451 | if (o == g->tmudata) /* last element? */ | ||
452 | g->tmudata = NULL; | ||
453 | else | ||
454 | g->tmudata->gch.next = udata->uv.next; | ||
455 | udata->uv.next = g->mainthread->next; /* return it to `root' list */ | ||
456 | g->mainthread->next = o; | ||
457 | makewhite(g, o); | ||
458 | tm = fasttm(L, udata->uv.metatable, TM_GC); | ||
459 | if (tm != NULL) { | ||
460 | lu_byte oldah = L->allowhook; | ||
461 | lu_mem oldt = g->GCthreshold; | ||
462 | L->allowhook = 0; /* stop debug hooks during GC tag method */ | ||
463 | g->GCthreshold = 2*g->totalbytes; /* avoid GC steps */ | ||
464 | setobj2s(L, L->top, tm); | ||
465 | setuvalue(L, L->top+1, udata); | ||
466 | L->top += 2; | ||
467 | luaD_call(L, L->top - 2, 0); | ||
468 | L->allowhook = oldah; /* restore hooks */ | ||
469 | g->GCthreshold = oldt; /* restore threshold */ | ||
470 | } | ||
471 | } | ||
472 | |||
473 | |||
474 | /* | ||
475 | ** Call all GC tag methods | ||
476 | */ | ||
477 | void luaC_callGCTM (lua_State *L) { | ||
478 | while (G(L)->tmudata) | ||
479 | GCTM(L); | ||
480 | } | ||
481 | |||
482 | |||
483 | void luaC_freeall (lua_State *L) { | ||
484 | global_State *g = G(L); | ||
485 | int i; | ||
486 | g->currentwhite = WHITEBITS | bitmask(SFIXEDBIT); /* mask to collect all elements */ | ||
487 | sweepwholelist(L, &g->rootgc); | ||
488 | for (i = 0; i < g->strt.size; i++) /* free all string lists */ | ||
489 | sweepwholelist(L, &g->strt.hash[i]); | ||
490 | } | ||
491 | |||
492 | |||
493 | static void markmt (global_State *g) { | ||
494 | int i; | ||
495 | for (i=0; i<NUM_TAGS; i++) | ||
496 | if (g->mt[i]) markobject(g, g->mt[i]); | ||
497 | } | ||
498 | |||
499 | |||
500 | /* mark root set */ | ||
501 | static void markroot (lua_State *L) { | ||
502 | global_State *g = G(L); | ||
503 | g->gray = NULL; | ||
504 | g->grayagain = NULL; | ||
505 | g->weak = NULL; | ||
506 | markobject(g, g->mainthread); | ||
507 | /* make global table be traversed before main stack */ | ||
508 | markvalue(g, gt(g->mainthread)); | ||
509 | markvalue(g, registry(L)); | ||
510 | markmt(g); | ||
511 | g->gcstate = GCSpropagate; | ||
512 | } | ||
513 | |||
514 | |||
515 | static void remarkupvals (global_State *g) { | ||
516 | UpVal *uv; | ||
517 | for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) { | ||
518 | lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv); | ||
519 | if (isgray(obj2gco(uv))) | ||
520 | markvalue(g, uv->v); | ||
521 | } | ||
522 | } | ||
523 | |||
524 | |||
525 | static void atomic (lua_State *L) { | ||
526 | global_State *g = G(L); | ||
527 | size_t udsize; /* total size of userdata to be finalized */ | ||
528 | /* remark occasional upvalues of (maybe) dead threads */ | ||
529 | remarkupvals(g); | ||
530 | /* traverse objects cautch by write barrier and by 'remarkupvals' */ | ||
531 | propagateall(g); | ||
532 | /* remark weak tables */ | ||
533 | g->gray = g->weak; | ||
534 | g->weak = NULL; | ||
535 | lua_assert(!iswhite(obj2gco(g->mainthread))); | ||
536 | markobject(g, L); /* mark running thread */ | ||
537 | markmt(g); /* mark basic metatables (again) */ | ||
538 | propagateall(g); | ||
539 | /* remark gray again */ | ||
540 | g->gray = g->grayagain; | ||
541 | g->grayagain = NULL; | ||
542 | propagateall(g); | ||
543 | udsize = luaC_separateudata(L, 0); /* separate userdata to be finalized */ | ||
544 | marktmu(g); /* mark `preserved' userdata */ | ||
545 | udsize += propagateall(g); /* remark, to propagate `preserveness' */ | ||
546 | cleartable(g->weak); /* remove collected objects from weak tables */ | ||
547 | /* flip current white */ | ||
548 | g->currentwhite = cast_byte(otherwhite(g)); | ||
549 | g->sweepstrgc = 0; | ||
550 | g->sweepgc = &g->rootgc; | ||
551 | g->gcstate = GCSsweepstring; | ||
552 | g->estimate = g->totalbytes - udsize; /* first estimate */ | ||
553 | } | ||
554 | |||
555 | |||
556 | static l_mem singlestep (lua_State *L) { | ||
557 | global_State *g = G(L); | ||
558 | /*lua_checkmemory(L);*/ | ||
559 | switch (g->gcstate) { | ||
560 | case GCSpause: { | ||
561 | markroot(L); /* start a new collection */ | ||
562 | return 0; | ||
563 | } | ||
564 | case GCSpropagate: { | ||
565 | if (g->gray) | ||
566 | return propagatemark(g); | ||
567 | else { /* no more `gray' objects */ | ||
568 | atomic(L); /* finish mark phase */ | ||
569 | return 0; | ||
570 | } | ||
571 | } | ||
572 | case GCSsweepstring: { | ||
573 | lu_mem old = g->totalbytes; | ||
574 | sweepwholelist(L, &g->strt.hash[g->sweepstrgc++]); | ||
575 | if (g->sweepstrgc >= g->strt.size) /* nothing more to sweep? */ | ||
576 | g->gcstate = GCSsweep; /* end sweep-string phase */ | ||
577 | lua_assert(old >= g->totalbytes); | ||
578 | g->estimate -= old - g->totalbytes; | ||
579 | return GCSWEEPCOST; | ||
580 | } | ||
581 | case GCSsweep: { | ||
582 | lu_mem old = g->totalbytes; | ||
583 | g->sweepgc = sweeplist(L, g->sweepgc, GCSWEEPMAX); | ||
584 | if (*g->sweepgc == NULL) { /* nothing more to sweep? */ | ||
585 | checkSizes(L); | ||
586 | g->gcstate = GCSfinalize; /* end sweep phase */ | ||
587 | } | ||
588 | lua_assert(old >= g->totalbytes); | ||
589 | g->estimate -= old - g->totalbytes; | ||
590 | return GCSWEEPMAX*GCSWEEPCOST; | ||
591 | } | ||
592 | case GCSfinalize: { | ||
593 | if (g->tmudata) { | ||
594 | GCTM(L); | ||
595 | if (g->estimate > GCFINALIZECOST) | ||
596 | g->estimate -= GCFINALIZECOST; | ||
597 | return GCFINALIZECOST; | ||
598 | } | ||
599 | else { | ||
600 | g->gcstate = GCSpause; /* end collection */ | ||
601 | g->gcdept = 0; | ||
602 | return 0; | ||
603 | } | ||
604 | } | ||
605 | default: lua_assert(0); return 0; | ||
606 | } | ||
607 | } | ||
608 | |||
609 | |||
610 | void luaC_step (lua_State *L) { | ||
611 | global_State *g = G(L); | ||
612 | l_mem lim = (GCSTEPSIZE/100) * g->gcstepmul; | ||
613 | if (lim == 0) | ||
614 | lim = (MAX_LUMEM-1)/2; /* no limit */ | ||
615 | g->gcdept += g->totalbytes - g->GCthreshold; | ||
616 | do { | ||
617 | lim -= singlestep(L); | ||
618 | if (g->gcstate == GCSpause) | ||
619 | break; | ||
620 | } while (lim > 0); | ||
621 | if (g->gcstate != GCSpause) { | ||
622 | if (g->gcdept < GCSTEPSIZE) | ||
623 | g->GCthreshold = g->totalbytes + GCSTEPSIZE; /* - lim/g->gcstepmul;*/ | ||
624 | else { | ||
625 | g->gcdept -= GCSTEPSIZE; | ||
626 | g->GCthreshold = g->totalbytes; | ||
627 | } | ||
628 | } | ||
629 | else { | ||
630 | lua_assert(g->totalbytes >= g->estimate); | ||
631 | setthreshold(g); | ||
632 | } | ||
633 | } | ||
634 | |||
635 | |||
636 | void luaC_fullgc (lua_State *L) { | ||
637 | global_State *g = G(L); | ||
638 | if (g->gcstate <= GCSpropagate) { | ||
639 | /* reset sweep marks to sweep all elements (returning them to white) */ | ||
640 | g->sweepstrgc = 0; | ||
641 | g->sweepgc = &g->rootgc; | ||
642 | /* reset other collector lists */ | ||
643 | g->gray = NULL; | ||
644 | g->grayagain = NULL; | ||
645 | g->weak = NULL; | ||
646 | g->gcstate = GCSsweepstring; | ||
647 | } | ||
648 | lua_assert(g->gcstate != GCSpause && g->gcstate != GCSpropagate); | ||
649 | /* finish any pending sweep phase */ | ||
650 | while (g->gcstate != GCSfinalize) { | ||
651 | lua_assert(g->gcstate == GCSsweepstring || g->gcstate == GCSsweep); | ||
652 | singlestep(L); | ||
653 | } | ||
654 | markroot(L); | ||
655 | while (g->gcstate != GCSpause) { | ||
656 | singlestep(L); | ||
657 | } | ||
658 | setthreshold(g); | ||
659 | } | ||
660 | |||
661 | |||
662 | void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v) { | ||
663 | global_State *g = G(L); | ||
664 | lua_assert(isblack(o) && iswhite(v) && !isdead(g, v) && !isdead(g, o)); | ||
665 | lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause); | ||
666 | lua_assert(ttype(&o->gch) != LUA_TTABLE); | ||
667 | /* must keep invariant? */ | ||
668 | if (g->gcstate == GCSpropagate) | ||
669 | reallymarkobject(g, v); /* restore invariant */ | ||
670 | else /* don't mind */ | ||
671 | makewhite(g, o); /* mark as white just to avoid other barriers */ | ||
672 | } | ||
673 | |||
674 | |||
675 | void luaC_barrierback (lua_State *L, Table *t) { | ||
676 | global_State *g = G(L); | ||
677 | GCObject *o = obj2gco(t); | ||
678 | lua_assert(isblack(o) && !isdead(g, o)); | ||
679 | lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause); | ||
680 | black2gray(o); /* make table gray (again) */ | ||
681 | t->gclist = g->grayagain; | ||
682 | g->grayagain = o; | ||
683 | } | ||
684 | |||
685 | |||
686 | void luaC_link (lua_State *L, GCObject *o, lu_byte tt) { | ||
687 | global_State *g = G(L); | ||
688 | o->gch.next = g->rootgc; | ||
689 | g->rootgc = o; | ||
690 | o->gch.marked = luaC_white(g); | ||
691 | o->gch.tt = tt; | ||
692 | } | ||
693 | |||
694 | |||
695 | void luaC_linkupval (lua_State *L, UpVal *uv) { | ||
696 | global_State *g = G(L); | ||
697 | GCObject *o = obj2gco(uv); | ||
698 | o->gch.next = g->rootgc; /* link upvalue into `rootgc' list */ | ||
699 | g->rootgc = o; | ||
700 | if (isgray(o)) { | ||
701 | if (g->gcstate == GCSpropagate) { | ||
702 | gray2black(o); /* closed upvalues need barrier */ | ||
703 | luaC_barrier(L, uv, uv->v); | ||
704 | } | ||
705 | else { /* sweep phase: sweep it (turning it into white) */ | ||
706 | makewhite(g, o); | ||
707 | lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause); | ||
708 | } | ||
709 | } | ||
710 | } | ||
711 | |||
diff --git a/apps/plugins/lua/lgc.h b/apps/plugins/lua/lgc.h new file mode 100644 index 0000000000..5123ccb479 --- /dev/null +++ b/apps/plugins/lua/lgc.h | |||
@@ -0,0 +1,110 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Garbage Collector | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lgc_h | ||
8 | #define lgc_h | ||
9 | |||
10 | |||
11 | #include "lobject.h" | ||
12 | |||
13 | |||
14 | /* | ||
15 | ** Possible states of the Garbage Collector | ||
16 | */ | ||
17 | #define GCSpause 0 | ||
18 | #define GCSpropagate 1 | ||
19 | #define GCSsweepstring 2 | ||
20 | #define GCSsweep 3 | ||
21 | #define GCSfinalize 4 | ||
22 | |||
23 | |||
24 | /* | ||
25 | ** some userful bit tricks | ||
26 | */ | ||
27 | #define resetbits(x,m) ((x) &= cast(lu_byte, ~(m))) | ||
28 | #define setbits(x,m) ((x) |= (m)) | ||
29 | #define testbits(x,m) ((x) & (m)) | ||
30 | #define bitmask(b) (1<<(b)) | ||
31 | #define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2)) | ||
32 | #define l_setbit(x,b) setbits(x, bitmask(b)) | ||
33 | #define resetbit(x,b) resetbits(x, bitmask(b)) | ||
34 | #define testbit(x,b) testbits(x, bitmask(b)) | ||
35 | #define set2bits(x,b1,b2) setbits(x, (bit2mask(b1, b2))) | ||
36 | #define reset2bits(x,b1,b2) resetbits(x, (bit2mask(b1, b2))) | ||
37 | #define test2bits(x,b1,b2) testbits(x, (bit2mask(b1, b2))) | ||
38 | |||
39 | |||
40 | |||
41 | /* | ||
42 | ** Layout for bit use in `marked' field: | ||
43 | ** bit 0 - object is white (type 0) | ||
44 | ** bit 1 - object is white (type 1) | ||
45 | ** bit 2 - object is black | ||
46 | ** bit 3 - for userdata: has been finalized | ||
47 | ** bit 3 - for tables: has weak keys | ||
48 | ** bit 4 - for tables: has weak values | ||
49 | ** bit 5 - object is fixed (should not be collected) | ||
50 | ** bit 6 - object is "super" fixed (only the main thread) | ||
51 | */ | ||
52 | |||
53 | |||
54 | #define WHITE0BIT 0 | ||
55 | #define WHITE1BIT 1 | ||
56 | #define BLACKBIT 2 | ||
57 | #define FINALIZEDBIT 3 | ||
58 | #define KEYWEAKBIT 3 | ||
59 | #define VALUEWEAKBIT 4 | ||
60 | #define FIXEDBIT 5 | ||
61 | #define SFIXEDBIT 6 | ||
62 | #define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) | ||
63 | |||
64 | |||
65 | #define iswhite(x) test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT) | ||
66 | #define isblack(x) testbit((x)->gch.marked, BLACKBIT) | ||
67 | #define isgray(x) (!isblack(x) && !iswhite(x)) | ||
68 | |||
69 | #define otherwhite(g) (g->currentwhite ^ WHITEBITS) | ||
70 | #define isdead(g,v) ((v)->gch.marked & otherwhite(g) & WHITEBITS) | ||
71 | |||
72 | #define changewhite(x) ((x)->gch.marked ^= WHITEBITS) | ||
73 | #define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT) | ||
74 | |||
75 | #define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x))) | ||
76 | |||
77 | #define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS) | ||
78 | |||
79 | |||
80 | #define luaC_checkGC(L) { \ | ||
81 | condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); \ | ||
82 | if (G(L)->totalbytes >= G(L)->GCthreshold) \ | ||
83 | luaC_step(L); } | ||
84 | |||
85 | |||
86 | #define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \ | ||
87 | luaC_barrierf(L,obj2gco(p),gcvalue(v)); } | ||
88 | |||
89 | #define luaC_barriert(L,t,v) { if (valiswhite(v) && isblack(obj2gco(t))) \ | ||
90 | luaC_barrierback(L,t); } | ||
91 | |||
92 | #define luaC_objbarrier(L,p,o) \ | ||
93 | { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \ | ||
94 | luaC_barrierf(L,obj2gco(p),obj2gco(o)); } | ||
95 | |||
96 | #define luaC_objbarriert(L,t,o) \ | ||
97 | { if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) luaC_barrierback(L,t); } | ||
98 | |||
99 | LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all); | ||
100 | LUAI_FUNC void luaC_callGCTM (lua_State *L); | ||
101 | LUAI_FUNC void luaC_freeall (lua_State *L); | ||
102 | LUAI_FUNC void luaC_step (lua_State *L); | ||
103 | LUAI_FUNC void luaC_fullgc (lua_State *L); | ||
104 | LUAI_FUNC void luaC_link (lua_State *L, GCObject *o, lu_byte tt); | ||
105 | LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv); | ||
106 | LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v); | ||
107 | LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t); | ||
108 | |||
109 | |||
110 | #endif | ||
diff --git a/apps/plugins/lua/llex.c b/apps/plugins/lua/llex.c new file mode 100644 index 0000000000..3d0ca5b58e --- /dev/null +++ b/apps/plugins/lua/llex.c | |||
@@ -0,0 +1,462 @@ | |||
1 | /* | ||
2 | ** $Id: llex.c,v 2.20.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** Lexical Analyzer | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <ctype.h> | ||
9 | /* #include <locale.h> */ | ||
10 | #include <string.h> | ||
11 | |||
12 | #define llex_c | ||
13 | #define LUA_CORE | ||
14 | |||
15 | #include "lua.h" | ||
16 | |||
17 | #include "ldo.h" | ||
18 | #include "llex.h" | ||
19 | #include "lobject.h" | ||
20 | #include "lparser.h" | ||
21 | #include "lstate.h" | ||
22 | #include "lstring.h" | ||
23 | #include "ltable.h" | ||
24 | #include "lzio.h" | ||
25 | |||
26 | |||
27 | |||
28 | #define next(ls) (ls->current = zgetc(ls->z)) | ||
29 | |||
30 | |||
31 | |||
32 | |||
33 | #define currIsNewline(ls) (ls->current == '\n' || ls->current == '\r') | ||
34 | |||
35 | |||
36 | /* ORDER RESERVED */ | ||
37 | const char *const luaX_tokens [] = { | ||
38 | "and", "break", "do", "else", "elseif", | ||
39 | "end", "false", "for", "function", "if", | ||
40 | "in", "local", "nil", "not", "or", "repeat", | ||
41 | "return", "then", "true", "until", "while", | ||
42 | "..", "...", "==", ">=", "<=", "~=", | ||
43 | "<number>", "<name>", "<string>", "<eof>", | ||
44 | NULL | ||
45 | }; | ||
46 | |||
47 | |||
48 | #define save_and_next(ls) (save(ls, ls->current), next(ls)) | ||
49 | |||
50 | |||
51 | static void save (LexState *ls, int c) { | ||
52 | Mbuffer *b = ls->buff; | ||
53 | if (b->n + 1 > b->buffsize) { | ||
54 | size_t newsize; | ||
55 | if (b->buffsize >= MAX_SIZET/2) | ||
56 | luaX_lexerror(ls, "lexical element too long", 0); | ||
57 | newsize = b->buffsize * 2; | ||
58 | luaZ_resizebuffer(ls->L, b, newsize); | ||
59 | } | ||
60 | b->buffer[b->n++] = cast(char, c); | ||
61 | } | ||
62 | |||
63 | |||
64 | void luaX_init (lua_State *L) { | ||
65 | int i; | ||
66 | for (i=0; i<NUM_RESERVED; i++) { | ||
67 | TString *ts = luaS_new(L, luaX_tokens[i]); | ||
68 | luaS_fix(ts); /* reserved words are never collected */ | ||
69 | lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN); | ||
70 | ts->tsv.reserved = cast_byte(i+1); /* reserved word */ | ||
71 | } | ||
72 | } | ||
73 | |||
74 | |||
75 | #define MAXSRC 80 | ||
76 | |||
77 | |||
78 | const char *luaX_token2str (LexState *ls, int token) { | ||
79 | if (token < FIRST_RESERVED) { | ||
80 | lua_assert(token == cast(unsigned char, token)); | ||
81 | return (iscntrl(token)) ? luaO_pushfstring(ls->L, "char(%d)", token) : | ||
82 | luaO_pushfstring(ls->L, "%c", token); | ||
83 | } | ||
84 | else | ||
85 | return luaX_tokens[token-FIRST_RESERVED]; | ||
86 | } | ||
87 | |||
88 | |||
89 | static const char *txtToken (LexState *ls, int token) { | ||
90 | switch (token) { | ||
91 | case TK_NAME: | ||
92 | case TK_STRING: | ||
93 | case TK_NUMBER: | ||
94 | save(ls, '\0'); | ||
95 | return luaZ_buffer(ls->buff); | ||
96 | default: | ||
97 | return luaX_token2str(ls, token); | ||
98 | } | ||
99 | } | ||
100 | |||
101 | |||
102 | void luaX_lexerror (LexState *ls, const char *msg, int token) { | ||
103 | char buff[MAXSRC]; | ||
104 | luaO_chunkid(buff, getstr(ls->source), MAXSRC); | ||
105 | rb->splashf(3*HZ, "%d %c 0x%X", ls->linenumber, ls->linenumber, ls->linenumber); | ||
106 | msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg); | ||
107 | if (token) | ||
108 | luaO_pushfstring(ls->L, "%s near " LUA_QS, msg, txtToken(ls, token)); | ||
109 | luaD_throw(ls->L, LUA_ERRSYNTAX); | ||
110 | } | ||
111 | |||
112 | |||
113 | void luaX_syntaxerror (LexState *ls, const char *msg) { | ||
114 | luaX_lexerror(ls, msg, ls->t.token); | ||
115 | } | ||
116 | |||
117 | |||
118 | TString *luaX_newstring (LexState *ls, const char *str, size_t l) { | ||
119 | lua_State *L = ls->L; | ||
120 | TString *ts = luaS_newlstr(L, str, l); | ||
121 | TValue *o = luaH_setstr(L, ls->fs->h, ts); /* entry for `str' */ | ||
122 | if (ttisnil(o)) | ||
123 | setbvalue(o, 1); /* make sure `str' will not be collected */ | ||
124 | return ts; | ||
125 | } | ||
126 | |||
127 | |||
128 | static void inclinenumber (LexState *ls) { | ||
129 | int old = ls->current; | ||
130 | lua_assert(currIsNewline(ls)); | ||
131 | next(ls); /* skip `\n' or `\r' */ | ||
132 | if (currIsNewline(ls) && ls->current != old) | ||
133 | next(ls); /* skip `\n\r' or `\r\n' */ | ||
134 | if (++ls->linenumber >= MAX_INT) | ||
135 | luaX_syntaxerror(ls, "chunk has too many lines"); | ||
136 | } | ||
137 | |||
138 | |||
139 | void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) { | ||
140 | ls->decpoint = '.'; | ||
141 | ls->L = L; | ||
142 | ls->lookahead.token = TK_EOS; /* no look-ahead token */ | ||
143 | ls->z = z; | ||
144 | ls->fs = NULL; | ||
145 | ls->linenumber = 1; | ||
146 | ls->lastline = 1; | ||
147 | ls->source = source; | ||
148 | luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */ | ||
149 | next(ls); /* read first char */ | ||
150 | } | ||
151 | |||
152 | |||
153 | |||
154 | /* | ||
155 | ** ======================================================= | ||
156 | ** LEXICAL ANALYZER | ||
157 | ** ======================================================= | ||
158 | */ | ||
159 | |||
160 | |||
161 | |||
162 | static int check_next (LexState *ls, const char *set) { | ||
163 | if (!strchr(set, ls->current)) | ||
164 | return 0; | ||
165 | save_and_next(ls); | ||
166 | return 1; | ||
167 | } | ||
168 | |||
169 | |||
170 | static void buffreplace (LexState *ls, char from, char to) { | ||
171 | size_t n = luaZ_bufflen(ls->buff); | ||
172 | char *p = luaZ_buffer(ls->buff); | ||
173 | while (n--) | ||
174 | if (p[n] == from) p[n] = to; | ||
175 | } | ||
176 | |||
177 | |||
178 | static void trydecpoint (LexState *ls, SemInfo *seminfo) { | ||
179 | /* format error: try to update decimal point separator */ | ||
180 | /* struct lconv *cv = localeconv(); */ | ||
181 | char old = ls->decpoint; | ||
182 | ls->decpoint = '.'; /* (cv ? cv->decimal_point[0] : '.'); */ | ||
183 | buffreplace(ls, old, ls->decpoint); /* try updated decimal separator */ | ||
184 | if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) { | ||
185 | /* format error with correct decimal point: no more options */ | ||
186 | buffreplace(ls, ls->decpoint, '.'); /* undo change (for error message) */ | ||
187 | luaX_lexerror(ls, "malformed number", TK_NUMBER); | ||
188 | } | ||
189 | } | ||
190 | |||
191 | |||
192 | /* LUA_NUMBER */ | ||
193 | static void read_numeral (LexState *ls, SemInfo *seminfo) { | ||
194 | lua_assert(isdigit(ls->current)); | ||
195 | do { | ||
196 | save_and_next(ls); | ||
197 | } while (isdigit(ls->current) || ls->current == '.'); | ||
198 | if (check_next(ls, "Ee")) /* `E'? */ | ||
199 | check_next(ls, "+-"); /* optional exponent sign */ | ||
200 | while (isalnum(ls->current) || ls->current == '_') | ||
201 | save_and_next(ls); | ||
202 | save(ls, '\0'); | ||
203 | buffreplace(ls, '.', ls->decpoint); /* follow locale for decimal point */ | ||
204 | if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) /* format error? */ | ||
205 | trydecpoint(ls, seminfo); /* try to update decimal point separator */ | ||
206 | } | ||
207 | |||
208 | |||
209 | static int skip_sep (LexState *ls) { | ||
210 | int count = 0; | ||
211 | int s = ls->current; | ||
212 | lua_assert(s == '[' || s == ']'); | ||
213 | save_and_next(ls); | ||
214 | while (ls->current == '=') { | ||
215 | save_and_next(ls); | ||
216 | count++; | ||
217 | } | ||
218 | return (ls->current == s) ? count : (-count) - 1; | ||
219 | } | ||
220 | |||
221 | |||
222 | static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) { | ||
223 | int cont = 0; | ||
224 | (void)(cont); /* avoid warnings when `cont' is not used */ | ||
225 | save_and_next(ls); /* skip 2nd `[' */ | ||
226 | if (currIsNewline(ls)) /* string starts with a newline? */ | ||
227 | inclinenumber(ls); /* skip it */ | ||
228 | for (;;) { | ||
229 | switch (ls->current) { | ||
230 | case EOZ: | ||
231 | luaX_lexerror(ls, (seminfo) ? "unfinished long string" : | ||
232 | "unfinished long comment", TK_EOS); | ||
233 | break; /* to avoid warnings */ | ||
234 | #if defined(LUA_COMPAT_LSTR) | ||
235 | case '[': { | ||
236 | if (skip_sep(ls) == sep) { | ||
237 | save_and_next(ls); /* skip 2nd `[' */ | ||
238 | cont++; | ||
239 | #if LUA_COMPAT_LSTR == 1 | ||
240 | if (sep == 0) | ||
241 | luaX_lexerror(ls, "nesting of [[...]] is deprecated", '['); | ||
242 | #endif | ||
243 | } | ||
244 | break; | ||
245 | } | ||
246 | #endif | ||
247 | case ']': { | ||
248 | if (skip_sep(ls) == sep) { | ||
249 | save_and_next(ls); /* skip 2nd `]' */ | ||
250 | #if defined(LUA_COMPAT_LSTR) && LUA_COMPAT_LSTR == 2 | ||
251 | cont--; | ||
252 | if (sep == 0 && cont >= 0) break; | ||
253 | #endif | ||
254 | goto endloop; | ||
255 | } | ||
256 | break; | ||
257 | } | ||
258 | case '\n': | ||
259 | case '\r': { | ||
260 | save(ls, '\n'); | ||
261 | inclinenumber(ls); | ||
262 | if (!seminfo) luaZ_resetbuffer(ls->buff); /* avoid wasting space */ | ||
263 | break; | ||
264 | } | ||
265 | default: { | ||
266 | if (seminfo) save_and_next(ls); | ||
267 | else next(ls); | ||
268 | } | ||
269 | } | ||
270 | } endloop: | ||
271 | if (seminfo) | ||
272 | seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + (2 + sep), | ||
273 | luaZ_bufflen(ls->buff) - 2*(2 + sep)); | ||
274 | } | ||
275 | |||
276 | |||
277 | static void read_string (LexState *ls, int del, SemInfo *seminfo) { | ||
278 | save_and_next(ls); | ||
279 | while (ls->current != del) { | ||
280 | switch (ls->current) { | ||
281 | case EOZ: | ||
282 | luaX_lexerror(ls, "unfinished string", TK_EOS); | ||
283 | continue; /* to avoid warnings */ | ||
284 | case '\n': | ||
285 | case '\r': | ||
286 | luaX_lexerror(ls, "unfinished string", TK_STRING); | ||
287 | continue; /* to avoid warnings */ | ||
288 | case '\\': { | ||
289 | int c; | ||
290 | next(ls); /* do not save the `\' */ | ||
291 | switch (ls->current) { | ||
292 | case 'a': c = '\a'; break; | ||
293 | case 'b': c = '\b'; break; | ||
294 | case 'f': c = '\f'; break; | ||
295 | case 'n': c = '\n'; break; | ||
296 | case 'r': c = '\r'; break; | ||
297 | case 't': c = '\t'; break; | ||
298 | case 'v': c = '\v'; break; | ||
299 | case '\n': /* go through */ | ||
300 | case '\r': save(ls, '\n'); inclinenumber(ls); continue; | ||
301 | case EOZ: continue; /* will raise an error next loop */ | ||
302 | default: { | ||
303 | if (!isdigit(ls->current)) | ||
304 | save_and_next(ls); /* handles \\, \", \', and \? */ | ||
305 | else { /* \xxx */ | ||
306 | int i = 0; | ||
307 | c = 0; | ||
308 | do { | ||
309 | c = 10*c + (ls->current-'0'); | ||
310 | next(ls); | ||
311 | } while (++i<3 && isdigit(ls->current)); | ||
312 | if (c > UCHAR_MAX) | ||
313 | luaX_lexerror(ls, "escape sequence too large", TK_STRING); | ||
314 | save(ls, c); | ||
315 | } | ||
316 | continue; | ||
317 | } | ||
318 | } | ||
319 | save(ls, c); | ||
320 | next(ls); | ||
321 | continue; | ||
322 | } | ||
323 | default: | ||
324 | save_and_next(ls); | ||
325 | } | ||
326 | } | ||
327 | save_and_next(ls); /* skip delimiter */ | ||
328 | seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1, | ||
329 | luaZ_bufflen(ls->buff) - 2); | ||
330 | } | ||
331 | |||
332 | |||
333 | static int llex (LexState *ls, SemInfo *seminfo) { | ||
334 | luaZ_resetbuffer(ls->buff); | ||
335 | for (;;) { | ||
336 | switch (ls->current) { | ||
337 | case '\n': | ||
338 | case '\r': { | ||
339 | inclinenumber(ls); | ||
340 | continue; | ||
341 | } | ||
342 | case '-': { | ||
343 | next(ls); | ||
344 | if (ls->current != '-') return '-'; | ||
345 | /* else is a comment */ | ||
346 | next(ls); | ||
347 | if (ls->current == '[') { | ||
348 | int sep = skip_sep(ls); | ||
349 | luaZ_resetbuffer(ls->buff); /* `skip_sep' may dirty the buffer */ | ||
350 | if (sep >= 0) { | ||
351 | read_long_string(ls, NULL, sep); /* long comment */ | ||
352 | luaZ_resetbuffer(ls->buff); | ||
353 | continue; | ||
354 | } | ||
355 | } | ||
356 | /* else short comment */ | ||
357 | while (!currIsNewline(ls) && ls->current != EOZ) | ||
358 | next(ls); | ||
359 | continue; | ||
360 | } | ||
361 | case '[': { | ||
362 | int sep = skip_sep(ls); | ||
363 | if (sep >= 0) { | ||
364 | read_long_string(ls, seminfo, sep); | ||
365 | return TK_STRING; | ||
366 | } | ||
367 | else if (sep == -1) return '['; | ||
368 | else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING); | ||
369 | } | ||
370 | case '=': { | ||
371 | next(ls); | ||
372 | if (ls->current != '=') return '='; | ||
373 | else { next(ls); return TK_EQ; } | ||
374 | } | ||
375 | case '<': { | ||
376 | next(ls); | ||
377 | if (ls->current != '=') return '<'; | ||
378 | else { next(ls); return TK_LE; } | ||
379 | } | ||
380 | case '>': { | ||
381 | next(ls); | ||
382 | if (ls->current != '=') return '>'; | ||
383 | else { next(ls); return TK_GE; } | ||
384 | } | ||
385 | case '~': { | ||
386 | next(ls); | ||
387 | if (ls->current != '=') return '~'; | ||
388 | else { next(ls); return TK_NE; } | ||
389 | } | ||
390 | case '"': | ||
391 | case '\'': { | ||
392 | read_string(ls, ls->current, seminfo); | ||
393 | return TK_STRING; | ||
394 | } | ||
395 | case '.': { | ||
396 | save_and_next(ls); | ||
397 | if (check_next(ls, ".")) { | ||
398 | if (check_next(ls, ".")) | ||
399 | return TK_DOTS; /* ... */ | ||
400 | else return TK_CONCAT; /* .. */ | ||
401 | } | ||
402 | else if (!isdigit(ls->current)) return '.'; | ||
403 | else { | ||
404 | read_numeral(ls, seminfo); | ||
405 | return TK_NUMBER; | ||
406 | } | ||
407 | } | ||
408 | case EOZ: { | ||
409 | return TK_EOS; | ||
410 | } | ||
411 | default: { | ||
412 | if (isspace(ls->current)) { | ||
413 | lua_assert(!currIsNewline(ls)); | ||
414 | next(ls); | ||
415 | continue; | ||
416 | } | ||
417 | else if (isdigit(ls->current)) { | ||
418 | read_numeral(ls, seminfo); | ||
419 | return TK_NUMBER; | ||
420 | } | ||
421 | else if (isalpha(ls->current) || ls->current == '_') { | ||
422 | /* identifier or reserved word */ | ||
423 | TString *ts; | ||
424 | do { | ||
425 | save_and_next(ls); | ||
426 | } while (isalnum(ls->current) || ls->current == '_'); | ||
427 | ts = luaX_newstring(ls, luaZ_buffer(ls->buff), | ||
428 | luaZ_bufflen(ls->buff)); | ||
429 | if (ts->tsv.reserved > 0) /* reserved word? */ | ||
430 | return ts->tsv.reserved - 1 + FIRST_RESERVED; | ||
431 | else { | ||
432 | seminfo->ts = ts; | ||
433 | return TK_NAME; | ||
434 | } | ||
435 | } | ||
436 | else { | ||
437 | int c = ls->current; | ||
438 | next(ls); | ||
439 | return c; /* single-char tokens (+ - / ...) */ | ||
440 | } | ||
441 | } | ||
442 | } | ||
443 | } | ||
444 | } | ||
445 | |||
446 | |||
447 | void luaX_next (LexState *ls) { | ||
448 | ls->lastline = ls->linenumber; | ||
449 | if (ls->lookahead.token != TK_EOS) { /* is there a look-ahead token? */ | ||
450 | ls->t = ls->lookahead; /* use this one */ | ||
451 | ls->lookahead.token = TK_EOS; /* and discharge it */ | ||
452 | } | ||
453 | else | ||
454 | ls->t.token = llex(ls, &ls->t.seminfo); /* read next token */ | ||
455 | } | ||
456 | |||
457 | |||
458 | void luaX_lookahead (LexState *ls) { | ||
459 | lua_assert(ls->lookahead.token == TK_EOS); | ||
460 | ls->lookahead.token = llex(ls, &ls->lookahead.seminfo); | ||
461 | } | ||
462 | |||
diff --git a/apps/plugins/lua/llex.h b/apps/plugins/lua/llex.h new file mode 100644 index 0000000000..fa8b7a2a28 --- /dev/null +++ b/apps/plugins/lua/llex.h | |||
@@ -0,0 +1,81 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Lexical Analyzer | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef llex_h | ||
8 | #define llex_h | ||
9 | |||
10 | #include "lobject.h" | ||
11 | #include "lzio.h" | ||
12 | |||
13 | |||
14 | #define FIRST_RESERVED 257 | ||
15 | |||
16 | /* maximum length of a reserved word */ | ||
17 | #define TOKEN_LEN (sizeof("function")/sizeof(char)) | ||
18 | |||
19 | |||
20 | /* | ||
21 | * WARNING: if you change the order of this enumeration, | ||
22 | * grep "ORDER RESERVED" | ||
23 | */ | ||
24 | enum RESERVED { | ||
25 | /* terminal symbols denoted by reserved words */ | ||
26 | TK_AND = FIRST_RESERVED, TK_BREAK, | ||
27 | TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION, | ||
28 | TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT, | ||
29 | TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE, | ||
30 | /* other terminal symbols */ | ||
31 | TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER, | ||
32 | TK_NAME, TK_STRING, TK_EOS | ||
33 | }; | ||
34 | |||
35 | /* number of reserved words */ | ||
36 | #define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1)) | ||
37 | |||
38 | |||
39 | /* array with token `names' */ | ||
40 | LUAI_DATA const char *const luaX_tokens []; | ||
41 | |||
42 | |||
43 | typedef union { | ||
44 | lua_Number r; | ||
45 | TString *ts; | ||
46 | } SemInfo; /* semantics information */ | ||
47 | |||
48 | |||
49 | typedef struct Token { | ||
50 | int token; | ||
51 | SemInfo seminfo; | ||
52 | } Token; | ||
53 | |||
54 | |||
55 | typedef struct LexState { | ||
56 | int current; /* current character (charint) */ | ||
57 | int linenumber; /* input line counter */ | ||
58 | int lastline; /* line of last token `consumed' */ | ||
59 | Token t; /* current token */ | ||
60 | Token lookahead; /* look ahead token */ | ||
61 | struct FuncState *fs; /* `FuncState' is private to the parser */ | ||
62 | struct lua_State *L; | ||
63 | ZIO *z; /* input stream */ | ||
64 | Mbuffer *buff; /* buffer for tokens */ | ||
65 | TString *source; /* current source name */ | ||
66 | char decpoint; /* locale decimal point */ | ||
67 | } LexState; | ||
68 | |||
69 | |||
70 | LUAI_FUNC void luaX_init (lua_State *L); | ||
71 | LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, | ||
72 | TString *source); | ||
73 | LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l); | ||
74 | LUAI_FUNC void luaX_next (LexState *ls); | ||
75 | LUAI_FUNC void luaX_lookahead (LexState *ls); | ||
76 | LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token); | ||
77 | LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s); | ||
78 | LUAI_FUNC const char *luaX_token2str (LexState *ls, int token); | ||
79 | |||
80 | |||
81 | #endif | ||
diff --git a/apps/plugins/lua/llimits.h b/apps/plugins/lua/llimits.h new file mode 100644 index 0000000000..a31ad160ad --- /dev/null +++ b/apps/plugins/lua/llimits.h | |||
@@ -0,0 +1,128 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Limits, basic types, and some other `installation-dependent' definitions | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef llimits_h | ||
8 | #define llimits_h | ||
9 | |||
10 | |||
11 | #include <limits.h> | ||
12 | #include <stddef.h> | ||
13 | |||
14 | |||
15 | #include "lua.h" | ||
16 | |||
17 | |||
18 | typedef LUAI_UINT32 lu_int32; | ||
19 | |||
20 | typedef LUAI_UMEM lu_mem; | ||
21 | |||
22 | typedef LUAI_MEM l_mem; | ||
23 | |||
24 | |||
25 | |||
26 | /* chars used as small naturals (so that `char' is reserved for characters) */ | ||
27 | typedef unsigned char lu_byte; | ||
28 | |||
29 | |||
30 | #define MAX_SIZET ((size_t)(~(size_t)0)-2) | ||
31 | |||
32 | #define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2) | ||
33 | |||
34 | |||
35 | #define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ | ||
36 | |||
37 | /* | ||
38 | ** conversion of pointer to integer | ||
39 | ** this is for hashing only; there is no problem if the integer | ||
40 | ** cannot hold the whole pointer value | ||
41 | */ | ||
42 | #define IntPoint(p) ((unsigned int)(lu_mem)(p)) | ||
43 | |||
44 | |||
45 | |||
46 | /* type to ensure maximum alignment */ | ||
47 | typedef LUAI_USER_ALIGNMENT_T L_Umaxalign; | ||
48 | |||
49 | |||
50 | /* result of a `usual argument conversion' over lua_Number */ | ||
51 | typedef LUAI_UACNUMBER l_uacNumber; | ||
52 | |||
53 | |||
54 | /* internal assertions for in-house debugging */ | ||
55 | #ifdef lua_assert | ||
56 | |||
57 | #define check_exp(c,e) (lua_assert(c), (e)) | ||
58 | #define api_check(l,e) lua_assert(e) | ||
59 | |||
60 | #else | ||
61 | |||
62 | #define lua_assert(c) ((void)0) | ||
63 | #define check_exp(c,e) (e) | ||
64 | #define api_check luai_apicheck | ||
65 | |||
66 | #endif | ||
67 | |||
68 | |||
69 | #ifndef UNUSED | ||
70 | #define UNUSED(x) ((void)(x)) /* to avoid warnings */ | ||
71 | #endif | ||
72 | |||
73 | |||
74 | #ifndef cast | ||
75 | #define cast(t, exp) ((t)(exp)) | ||
76 | #endif | ||
77 | |||
78 | #define cast_byte(i) cast(lu_byte, (i)) | ||
79 | #define cast_num(i) cast(lua_Number, (i)) | ||
80 | #define cast_int(i) cast(int, (i)) | ||
81 | |||
82 | |||
83 | |||
84 | /* | ||
85 | ** type for virtual-machine instructions | ||
86 | ** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h) | ||
87 | */ | ||
88 | typedef lu_int32 Instruction; | ||
89 | |||
90 | |||
91 | |||
92 | /* maximum stack for a Lua function */ | ||
93 | #define MAXSTACK 250 | ||
94 | |||
95 | |||
96 | |||
97 | /* minimum size for the string table (must be power of 2) */ | ||
98 | #ifndef MINSTRTABSIZE | ||
99 | #define MINSTRTABSIZE 32 | ||
100 | #endif | ||
101 | |||
102 | |||
103 | /* minimum size for string buffer */ | ||
104 | #ifndef LUA_MINBUFFER | ||
105 | #define LUA_MINBUFFER 32 | ||
106 | #endif | ||
107 | |||
108 | |||
109 | #ifndef lua_lock | ||
110 | #define lua_lock(L) ((void) 0) | ||
111 | #define lua_unlock(L) ((void) 0) | ||
112 | #endif | ||
113 | |||
114 | #ifndef luai_threadyield | ||
115 | #define luai_threadyield(L) {lua_unlock(L); lua_lock(L);} | ||
116 | #endif | ||
117 | |||
118 | |||
119 | /* | ||
120 | ** macro to control inclusion of some hard tests on stack reallocation | ||
121 | */ | ||
122 | #ifndef HARDSTACKTESTS | ||
123 | #define condhardstacktests(x) ((void)0) | ||
124 | #else | ||
125 | #define condhardstacktests(x) x | ||
126 | #endif | ||
127 | |||
128 | #endif | ||
diff --git a/apps/plugins/lua/lmem.c b/apps/plugins/lua/lmem.c new file mode 100644 index 0000000000..ae7d8c965f --- /dev/null +++ b/apps/plugins/lua/lmem.c | |||
@@ -0,0 +1,86 @@ | |||
1 | /* | ||
2 | ** $Id: lmem.c,v 1.70.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** Interface to Memory Manager | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stddef.h> | ||
9 | |||
10 | #define lmem_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "ldebug.h" | ||
16 | #include "ldo.h" | ||
17 | #include "lmem.h" | ||
18 | #include "lobject.h" | ||
19 | #include "lstate.h" | ||
20 | |||
21 | |||
22 | |||
23 | /* | ||
24 | ** About the realloc function: | ||
25 | ** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize); | ||
26 | ** (`osize' is the old size, `nsize' is the new size) | ||
27 | ** | ||
28 | ** Lua ensures that (ptr == NULL) iff (osize == 0). | ||
29 | ** | ||
30 | ** * frealloc(ud, NULL, 0, x) creates a new block of size `x' | ||
31 | ** | ||
32 | ** * frealloc(ud, p, x, 0) frees the block `p' | ||
33 | ** (in this specific case, frealloc must return NULL). | ||
34 | ** particularly, frealloc(ud, NULL, 0, 0) does nothing | ||
35 | ** (which is equivalent to free(NULL) in ANSI C) | ||
36 | ** | ||
37 | ** frealloc returns NULL if it cannot create or reallocate the area | ||
38 | ** (any reallocation to an equal or smaller size cannot fail!) | ||
39 | */ | ||
40 | |||
41 | |||
42 | |||
43 | #define MINSIZEARRAY 4 | ||
44 | |||
45 | |||
46 | void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems, | ||
47 | int limit, const char *errormsg) { | ||
48 | void *newblock; | ||
49 | int newsize; | ||
50 | if (*size >= limit/2) { /* cannot double it? */ | ||
51 | if (*size >= limit) /* cannot grow even a little? */ | ||
52 | luaG_runerror(L, errormsg); | ||
53 | newsize = limit; /* still have at least one free place */ | ||
54 | } | ||
55 | else { | ||
56 | newsize = (*size)*2; | ||
57 | if (newsize < MINSIZEARRAY) | ||
58 | newsize = MINSIZEARRAY; /* minimum size */ | ||
59 | } | ||
60 | newblock = luaM_reallocv(L, block, *size, newsize, size_elems); | ||
61 | *size = newsize; /* update only when everything else is OK */ | ||
62 | return newblock; | ||
63 | } | ||
64 | |||
65 | |||
66 | void *luaM_toobig (lua_State *L) { | ||
67 | luaG_runerror(L, "memory allocation error: block too big"); | ||
68 | return NULL; /* to avoid warnings */ | ||
69 | } | ||
70 | |||
71 | |||
72 | |||
73 | /* | ||
74 | ** generic allocation routine. | ||
75 | */ | ||
76 | void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) { | ||
77 | global_State *g = G(L); | ||
78 | lua_assert((osize == 0) == (block == NULL)); | ||
79 | block = (*g->frealloc)(g->ud, block, osize, nsize); | ||
80 | if (block == NULL && nsize > 0) | ||
81 | luaD_throw(L, LUA_ERRMEM); | ||
82 | lua_assert((nsize == 0) == (block == NULL)); | ||
83 | g->totalbytes = (g->totalbytes - osize) + nsize; | ||
84 | return block; | ||
85 | } | ||
86 | |||
diff --git a/apps/plugins/lua/lmem.h b/apps/plugins/lua/lmem.h new file mode 100644 index 0000000000..97a888c7f8 --- /dev/null +++ b/apps/plugins/lua/lmem.h | |||
@@ -0,0 +1,49 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Interface to Memory Manager | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lmem_h | ||
8 | #define lmem_h | ||
9 | |||
10 | |||
11 | #include <stddef.h> | ||
12 | |||
13 | #include "llimits.h" | ||
14 | #include "lua.h" | ||
15 | |||
16 | #define MEMERRMSG "not enough memory" | ||
17 | |||
18 | |||
19 | #define luaM_reallocv(L,b,on,n,e) \ | ||
20 | ((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ? /* +1 to avoid warnings */ \ | ||
21 | luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \ | ||
22 | luaM_toobig(L)) | ||
23 | |||
24 | #define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) | ||
25 | #define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) | ||
26 | #define luaM_freearray(L, b, n, t) luaM_reallocv(L, (b), n, 0, sizeof(t)) | ||
27 | |||
28 | #define luaM_malloc(L,t) luaM_realloc_(L, NULL, 0, (t)) | ||
29 | #define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) | ||
30 | #define luaM_newvector(L,n,t) \ | ||
31 | cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) | ||
32 | |||
33 | #define luaM_growvector(L,v,nelems,size,t,limit,e) \ | ||
34 | if ((nelems)+1 > (size)) \ | ||
35 | ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) | ||
36 | |||
37 | #define luaM_reallocvector(L, v,oldn,n,t) \ | ||
38 | ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) | ||
39 | |||
40 | |||
41 | LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, | ||
42 | size_t size); | ||
43 | LUAI_FUNC void *luaM_toobig (lua_State *L); | ||
44 | LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size, | ||
45 | size_t size_elem, int limit, | ||
46 | const char *errormsg); | ||
47 | |||
48 | #endif | ||
49 | |||
diff --git a/apps/plugins/lua/lobject.c b/apps/plugins/lua/lobject.c new file mode 100644 index 0000000000..62ad8e9359 --- /dev/null +++ b/apps/plugins/lua/lobject.c | |||
@@ -0,0 +1,214 @@ | |||
1 | /* | ||
2 | ** $Id: lobject.c,v 2.22.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** Some generic functions over Lua objects | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #include <ctype.h> | ||
8 | #include <stdarg.h> | ||
9 | #include <stdio.h> | ||
10 | #include <stdlib.h> | ||
11 | #include <string.h> | ||
12 | |||
13 | #define lobject_c | ||
14 | #define LUA_CORE | ||
15 | |||
16 | #include "lua.h" | ||
17 | |||
18 | #include "ldo.h" | ||
19 | #include "lmem.h" | ||
20 | #include "lobject.h" | ||
21 | #include "lstate.h" | ||
22 | #include "lstring.h" | ||
23 | #include "lvm.h" | ||
24 | |||
25 | |||
26 | |||
27 | const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL}; | ||
28 | |||
29 | |||
30 | /* | ||
31 | ** converts an integer to a "floating point byte", represented as | ||
32 | ** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if | ||
33 | ** eeeee != 0 and (xxx) otherwise. | ||
34 | */ | ||
35 | int luaO_int2fb (unsigned int x) { | ||
36 | int e = 0; /* expoent */ | ||
37 | while (x >= 16) { | ||
38 | x = (x+1) >> 1; | ||
39 | e++; | ||
40 | } | ||
41 | if (x < 8) return x; | ||
42 | else return ((e+1) << 3) | (cast_int(x) - 8); | ||
43 | } | ||
44 | |||
45 | |||
46 | /* converts back */ | ||
47 | int luaO_fb2int (int x) { | ||
48 | int e = (x >> 3) & 31; | ||
49 | if (e == 0) return x; | ||
50 | else return ((x & 7)+8) << (e - 1); | ||
51 | } | ||
52 | |||
53 | |||
54 | int luaO_log2 (unsigned int x) { | ||
55 | static const lu_byte log_2[256] = { | ||
56 | 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, | ||
57 | 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, | ||
58 | 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, | ||
59 | 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, | ||
60 | 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, | ||
61 | 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, | ||
62 | 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, | ||
63 | 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 | ||
64 | }; | ||
65 | int l = -1; | ||
66 | while (x >= 256) { l += 8; x >>= 8; } | ||
67 | return l + log_2[x]; | ||
68 | |||
69 | } | ||
70 | |||
71 | |||
72 | int luaO_rawequalObj (const TValue *t1, const TValue *t2) { | ||
73 | if (ttype(t1) != ttype(t2)) return 0; | ||
74 | else switch (ttype(t1)) { | ||
75 | case LUA_TNIL: | ||
76 | return 1; | ||
77 | case LUA_TNUMBER: | ||
78 | return luai_numeq(nvalue(t1), nvalue(t2)); | ||
79 | case LUA_TBOOLEAN: | ||
80 | return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */ | ||
81 | case LUA_TLIGHTUSERDATA: | ||
82 | return pvalue(t1) == pvalue(t2); | ||
83 | default: | ||
84 | lua_assert(iscollectable(t1)); | ||
85 | return gcvalue(t1) == gcvalue(t2); | ||
86 | } | ||
87 | } | ||
88 | |||
89 | |||
90 | int luaO_str2d (const char *s, lua_Number *result) { | ||
91 | char *endptr; | ||
92 | *result = lua_str2number(s, &endptr); | ||
93 | if (endptr == s) return 0; /* conversion failed */ | ||
94 | if (*endptr == 'x' || *endptr == 'X') /* maybe an hexadecimal constant? */ | ||
95 | *result = cast_num(strtoul(s, &endptr, 16)); | ||
96 | if (*endptr == '\0') return 1; /* most common case */ | ||
97 | while (isspace(cast(unsigned char, *endptr))) endptr++; | ||
98 | if (*endptr != '\0') return 0; /* invalid trailing characters? */ | ||
99 | return 1; | ||
100 | } | ||
101 | |||
102 | |||
103 | |||
104 | static void pushstr (lua_State *L, const char *str) { | ||
105 | setsvalue2s(L, L->top, luaS_new(L, str)); | ||
106 | incr_top(L); | ||
107 | } | ||
108 | |||
109 | |||
110 | /* this function handles only `%d', `%c', %f, %p, and `%s' formats */ | ||
111 | const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { | ||
112 | int n = 1; | ||
113 | pushstr(L, ""); | ||
114 | for (;;) { | ||
115 | const char *e = strchr(fmt, '%'); | ||
116 | if (e == NULL) break; | ||
117 | setsvalue2s(L, L->top, luaS_newlstr(L, fmt, e-fmt)); | ||
118 | incr_top(L); | ||
119 | switch (*(e+1)) { | ||
120 | case 's': { | ||
121 | const char *s = va_arg(argp, char *); | ||
122 | if (s == NULL) s = "(null)"; | ||
123 | pushstr(L, s); | ||
124 | break; | ||
125 | } | ||
126 | case 'c': { | ||
127 | char buff[2]; | ||
128 | buff[0] = cast(char, va_arg(argp, int)); | ||
129 | buff[1] = '\0'; | ||
130 | pushstr(L, buff); | ||
131 | break; | ||
132 | } | ||
133 | case 'd': { | ||
134 | setnvalue(L->top, cast_num(va_arg(argp, int))); | ||
135 | incr_top(L); | ||
136 | break; | ||
137 | } | ||
138 | case 'f': { | ||
139 | setnvalue(L->top, cast_num(va_arg(argp, l_uacNumber))); | ||
140 | incr_top(L); | ||
141 | break; | ||
142 | } | ||
143 | case 'p': { | ||
144 | char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */ | ||
145 | snprintf(buff, 4*sizeof(void *) + 8, "%p", va_arg(argp, void *)); | ||
146 | pushstr(L, buff); | ||
147 | break; | ||
148 | } | ||
149 | case '%': { | ||
150 | pushstr(L, "%"); | ||
151 | break; | ||
152 | } | ||
153 | default: { | ||
154 | char buff[3]; | ||
155 | buff[0] = '%'; | ||
156 | buff[1] = *(e+1); | ||
157 | buff[2] = '\0'; | ||
158 | pushstr(L, buff); | ||
159 | break; | ||
160 | } | ||
161 | } | ||
162 | n += 2; | ||
163 | fmt = e+2; | ||
164 | } | ||
165 | pushstr(L, fmt); | ||
166 | luaV_concat(L, n+1, cast_int(L->top - L->base) - 1); | ||
167 | L->top -= n; | ||
168 | return svalue(L->top - 1); | ||
169 | } | ||
170 | |||
171 | |||
172 | const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) { | ||
173 | const char *msg; | ||
174 | va_list argp; | ||
175 | va_start(argp, fmt); | ||
176 | msg = luaO_pushvfstring(L, fmt, argp); | ||
177 | va_end(argp); | ||
178 | return msg; | ||
179 | } | ||
180 | |||
181 | |||
182 | void luaO_chunkid (char *out, const char *source, size_t bufflen) { | ||
183 | if (*source == '=') { | ||
184 | strncpy(out, source+1, bufflen); /* remove first char */ | ||
185 | out[bufflen-1] = '\0'; /* ensures null termination */ | ||
186 | } | ||
187 | else { /* out = "source", or "...source" */ | ||
188 | if (*source == '@') { | ||
189 | size_t l; | ||
190 | source++; /* skip the `@' */ | ||
191 | bufflen -= sizeof(" '...' "); | ||
192 | l = strlen(source); | ||
193 | strcpy(out, ""); | ||
194 | if (l > bufflen) { | ||
195 | source += (l-bufflen); /* get last part of file name */ | ||
196 | strcat(out, "..."); | ||
197 | } | ||
198 | strcat(out, source); | ||
199 | } | ||
200 | else { /* out = [string "string"] */ | ||
201 | size_t len = strcspn(source, "\n\r"); /* stop at first newline */ | ||
202 | bufflen -= sizeof(" [string \"...\"] "); | ||
203 | if (len > bufflen) len = bufflen; | ||
204 | strcpy(out, "[string \""); | ||
205 | if (source[len] != '\0') { /* must truncate? */ | ||
206 | strncat(out, source, len); | ||
207 | strcat(out, "..."); | ||
208 | } | ||
209 | else | ||
210 | strcat(out, source); | ||
211 | strcat(out, "\"]"); | ||
212 | } | ||
213 | } | ||
214 | } | ||
diff --git a/apps/plugins/lua/lobject.h b/apps/plugins/lua/lobject.h new file mode 100644 index 0000000000..93288fe0fb --- /dev/null +++ b/apps/plugins/lua/lobject.h | |||
@@ -0,0 +1,381 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Type definitions for Lua objects | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #ifndef lobject_h | ||
9 | #define lobject_h | ||
10 | |||
11 | |||
12 | #include <stdarg.h> | ||
13 | |||
14 | |||
15 | #include "llimits.h" | ||
16 | #include "lua.h" | ||
17 | |||
18 | |||
19 | /* tags for values visible from Lua */ | ||
20 | #define LAST_TAG LUA_TTHREAD | ||
21 | |||
22 | #define NUM_TAGS (LAST_TAG+1) | ||
23 | |||
24 | |||
25 | /* | ||
26 | ** Extra tags for non-values | ||
27 | */ | ||
28 | #define LUA_TPROTO (LAST_TAG+1) | ||
29 | #define LUA_TUPVAL (LAST_TAG+2) | ||
30 | #define LUA_TDEADKEY (LAST_TAG+3) | ||
31 | |||
32 | |||
33 | /* | ||
34 | ** Union of all collectable objects | ||
35 | */ | ||
36 | typedef union GCObject GCObject; | ||
37 | |||
38 | |||
39 | /* | ||
40 | ** Common Header for all collectable objects (in macro form, to be | ||
41 | ** included in other objects) | ||
42 | */ | ||
43 | #define CommonHeader GCObject *next; lu_byte tt; lu_byte marked | ||
44 | |||
45 | |||
46 | /* | ||
47 | ** Common header in struct form | ||
48 | */ | ||
49 | typedef struct GCheader { | ||
50 | CommonHeader; | ||
51 | } GCheader; | ||
52 | |||
53 | |||
54 | |||
55 | |||
56 | /* | ||
57 | ** Union of all Lua values | ||
58 | */ | ||
59 | typedef union { | ||
60 | GCObject *gc; | ||
61 | void *p; | ||
62 | lua_Number n; | ||
63 | int b; | ||
64 | } Value; | ||
65 | |||
66 | |||
67 | /* | ||
68 | ** Tagged Values | ||
69 | */ | ||
70 | |||
71 | #define TValuefields Value value; int tt | ||
72 | |||
73 | typedef struct lua_TValue { | ||
74 | TValuefields; | ||
75 | } TValue; | ||
76 | |||
77 | |||
78 | /* Macros to test type */ | ||
79 | #define ttisnil(o) (ttype(o) == LUA_TNIL) | ||
80 | #define ttisnumber(o) (ttype(o) == LUA_TNUMBER) | ||
81 | #define ttisstring(o) (ttype(o) == LUA_TSTRING) | ||
82 | #define ttistable(o) (ttype(o) == LUA_TTABLE) | ||
83 | #define ttisfunction(o) (ttype(o) == LUA_TFUNCTION) | ||
84 | #define ttisboolean(o) (ttype(o) == LUA_TBOOLEAN) | ||
85 | #define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA) | ||
86 | #define ttisthread(o) (ttype(o) == LUA_TTHREAD) | ||
87 | #define ttislightuserdata(o) (ttype(o) == LUA_TLIGHTUSERDATA) | ||
88 | |||
89 | /* Macros to access values */ | ||
90 | #define ttype(o) ((o)->tt) | ||
91 | #define gcvalue(o) check_exp(iscollectable(o), (o)->value.gc) | ||
92 | #define pvalue(o) check_exp(ttislightuserdata(o), (o)->value.p) | ||
93 | #define nvalue(o) check_exp(ttisnumber(o), (o)->value.n) | ||
94 | #define rawtsvalue(o) check_exp(ttisstring(o), &(o)->value.gc->ts) | ||
95 | #define tsvalue(o) (&rawtsvalue(o)->tsv) | ||
96 | #define rawuvalue(o) check_exp(ttisuserdata(o), &(o)->value.gc->u) | ||
97 | #define uvalue(o) (&rawuvalue(o)->uv) | ||
98 | #define clvalue(o) check_exp(ttisfunction(o), &(o)->value.gc->cl) | ||
99 | #define hvalue(o) check_exp(ttistable(o), &(o)->value.gc->h) | ||
100 | #define bvalue(o) check_exp(ttisboolean(o), (o)->value.b) | ||
101 | #define thvalue(o) check_exp(ttisthread(o), &(o)->value.gc->th) | ||
102 | |||
103 | #define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0)) | ||
104 | |||
105 | /* | ||
106 | ** for internal debug only | ||
107 | */ | ||
108 | #define checkconsistency(obj) \ | ||
109 | lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt)) | ||
110 | |||
111 | #define checkliveness(g,obj) \ | ||
112 | lua_assert(!iscollectable(obj) || \ | ||
113 | ((ttype(obj) == (obj)->value.gc->gch.tt) && !isdead(g, (obj)->value.gc))) | ||
114 | |||
115 | |||
116 | /* Macros to set values */ | ||
117 | #define setnilvalue(obj) ((obj)->tt=LUA_TNIL) | ||
118 | |||
119 | #define setnvalue(obj,x) \ | ||
120 | { TValue *i_o=(obj); i_o->value.n=(x); i_o->tt=LUA_TNUMBER; } | ||
121 | |||
122 | #define setpvalue(obj,x) \ | ||
123 | { TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; } | ||
124 | |||
125 | #define setbvalue(obj,x) \ | ||
126 | { TValue *i_o=(obj); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; } | ||
127 | |||
128 | #define setsvalue(L,obj,x) \ | ||
129 | { TValue *i_o=(obj); \ | ||
130 | i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TSTRING; \ | ||
131 | checkliveness(G(L),i_o); } | ||
132 | |||
133 | #define setuvalue(L,obj,x) \ | ||
134 | { TValue *i_o=(obj); \ | ||
135 | i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TUSERDATA; \ | ||
136 | checkliveness(G(L),i_o); } | ||
137 | |||
138 | #define setthvalue(L,obj,x) \ | ||
139 | { TValue *i_o=(obj); \ | ||
140 | i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTHREAD; \ | ||
141 | checkliveness(G(L),i_o); } | ||
142 | |||
143 | #define setclvalue(L,obj,x) \ | ||
144 | { TValue *i_o=(obj); \ | ||
145 | i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TFUNCTION; \ | ||
146 | checkliveness(G(L),i_o); } | ||
147 | |||
148 | #define sethvalue(L,obj,x) \ | ||
149 | { TValue *i_o=(obj); \ | ||
150 | i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTABLE; \ | ||
151 | checkliveness(G(L),i_o); } | ||
152 | |||
153 | #define setptvalue(L,obj,x) \ | ||
154 | { TValue *i_o=(obj); \ | ||
155 | i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \ | ||
156 | checkliveness(G(L),i_o); } | ||
157 | |||
158 | |||
159 | |||
160 | |||
161 | #define setobj(L,obj1,obj2) \ | ||
162 | { const TValue *o2=(obj2); TValue *o1=(obj1); \ | ||
163 | o1->value = o2->value; o1->tt=o2->tt; \ | ||
164 | checkliveness(G(L),o1); } | ||
165 | |||
166 | |||
167 | /* | ||
168 | ** different types of sets, according to destination | ||
169 | */ | ||
170 | |||
171 | /* from stack to (same) stack */ | ||
172 | #define setobjs2s setobj | ||
173 | /* to stack (not from same stack) */ | ||
174 | #define setobj2s setobj | ||
175 | #define setsvalue2s setsvalue | ||
176 | #define sethvalue2s sethvalue | ||
177 | #define setptvalue2s setptvalue | ||
178 | /* from table to same table */ | ||
179 | #define setobjt2t setobj | ||
180 | /* to table */ | ||
181 | #define setobj2t setobj | ||
182 | /* to new object */ | ||
183 | #define setobj2n setobj | ||
184 | #define setsvalue2n setsvalue | ||
185 | |||
186 | #define setttype(obj, tt) (ttype(obj) = (tt)) | ||
187 | |||
188 | |||
189 | #define iscollectable(o) (ttype(o) >= LUA_TSTRING) | ||
190 | |||
191 | |||
192 | |||
193 | typedef TValue *StkId; /* index to stack elements */ | ||
194 | |||
195 | |||
196 | /* | ||
197 | ** String headers for string table | ||
198 | */ | ||
199 | typedef union TString { | ||
200 | L_Umaxalign dummy; /* ensures maximum alignment for strings */ | ||
201 | struct { | ||
202 | CommonHeader; | ||
203 | lu_byte reserved; | ||
204 | unsigned int hash; | ||
205 | size_t len; | ||
206 | } tsv; | ||
207 | } TString; | ||
208 | |||
209 | |||
210 | #define getstr(ts) cast(const char *, (ts) + 1) | ||
211 | #define svalue(o) getstr(rawtsvalue(o)) | ||
212 | |||
213 | |||
214 | |||
215 | typedef union Udata { | ||
216 | L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */ | ||
217 | struct { | ||
218 | CommonHeader; | ||
219 | struct Table *metatable; | ||
220 | struct Table *env; | ||
221 | size_t len; | ||
222 | } uv; | ||
223 | } Udata; | ||
224 | |||
225 | |||
226 | |||
227 | |||
228 | /* | ||
229 | ** Function Prototypes | ||
230 | */ | ||
231 | typedef struct Proto { | ||
232 | CommonHeader; | ||
233 | TValue *k; /* constants used by the function */ | ||
234 | Instruction *code; | ||
235 | struct Proto **p; /* functions defined inside the function */ | ||
236 | int *lineinfo; /* map from opcodes to source lines */ | ||
237 | struct LocVar *locvars; /* information about local variables */ | ||
238 | TString **upvalues; /* upvalue names */ | ||
239 | TString *source; | ||
240 | int sizeupvalues; | ||
241 | int sizek; /* size of `k' */ | ||
242 | int sizecode; | ||
243 | int sizelineinfo; | ||
244 | int sizep; /* size of `p' */ | ||
245 | int sizelocvars; | ||
246 | int linedefined; | ||
247 | int lastlinedefined; | ||
248 | GCObject *gclist; | ||
249 | lu_byte nups; /* number of upvalues */ | ||
250 | lu_byte numparams; | ||
251 | lu_byte is_vararg; | ||
252 | lu_byte maxstacksize; | ||
253 | } Proto; | ||
254 | |||
255 | |||
256 | /* masks for new-style vararg */ | ||
257 | #define VARARG_HASARG 1 | ||
258 | #define VARARG_ISVARARG 2 | ||
259 | #define VARARG_NEEDSARG 4 | ||
260 | |||
261 | |||
262 | typedef struct LocVar { | ||
263 | TString *varname; | ||
264 | int startpc; /* first point where variable is active */ | ||
265 | int endpc; /* first point where variable is dead */ | ||
266 | } LocVar; | ||
267 | |||
268 | |||
269 | |||
270 | /* | ||
271 | ** Upvalues | ||
272 | */ | ||
273 | |||
274 | typedef struct UpVal { | ||
275 | CommonHeader; | ||
276 | TValue *v; /* points to stack or to its own value */ | ||
277 | union { | ||
278 | TValue value; /* the value (when closed) */ | ||
279 | struct { /* double linked list (when open) */ | ||
280 | struct UpVal *prev; | ||
281 | struct UpVal *next; | ||
282 | } l; | ||
283 | } u; | ||
284 | } UpVal; | ||
285 | |||
286 | |||
287 | /* | ||
288 | ** Closures | ||
289 | */ | ||
290 | |||
291 | #define ClosureHeader \ | ||
292 | CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist; \ | ||
293 | struct Table *env | ||
294 | |||
295 | typedef struct CClosure { | ||
296 | ClosureHeader; | ||
297 | lua_CFunction f; | ||
298 | TValue upvalue[1]; | ||
299 | } CClosure; | ||
300 | |||
301 | |||
302 | typedef struct LClosure { | ||
303 | ClosureHeader; | ||
304 | struct Proto *p; | ||
305 | UpVal *upvals[1]; | ||
306 | } LClosure; | ||
307 | |||
308 | |||
309 | typedef union Closure { | ||
310 | CClosure c; | ||
311 | LClosure l; | ||
312 | } Closure; | ||
313 | |||
314 | |||
315 | #define iscfunction(o) (ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC) | ||
316 | #define isLfunction(o) (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC) | ||
317 | |||
318 | |||
319 | /* | ||
320 | ** Tables | ||
321 | */ | ||
322 | |||
323 | typedef union TKey { | ||
324 | struct { | ||
325 | TValuefields; | ||
326 | struct Node *next; /* for chaining */ | ||
327 | } nk; | ||
328 | TValue tvk; | ||
329 | } TKey; | ||
330 | |||
331 | |||
332 | typedef struct Node { | ||
333 | TValue i_val; | ||
334 | TKey i_key; | ||
335 | } Node; | ||
336 | |||
337 | |||
338 | typedef struct Table { | ||
339 | CommonHeader; | ||
340 | lu_byte flags; /* 1<<p means tagmethod(p) is not present */ | ||
341 | lu_byte lsizenode; /* log2 of size of `node' array */ | ||
342 | struct Table *metatable; | ||
343 | TValue *array; /* array part */ | ||
344 | Node *node; | ||
345 | Node *lastfree; /* any free position is before this position */ | ||
346 | GCObject *gclist; | ||
347 | int sizearray; /* size of `array' array */ | ||
348 | } Table; | ||
349 | |||
350 | |||
351 | |||
352 | /* | ||
353 | ** `module' operation for hashing (size is always a power of 2) | ||
354 | */ | ||
355 | #define lmod(s,size) \ | ||
356 | (check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1))))) | ||
357 | |||
358 | |||
359 | #define twoto(x) (1<<(x)) | ||
360 | #define sizenode(t) (twoto((t)->lsizenode)) | ||
361 | |||
362 | |||
363 | #define luaO_nilobject (&luaO_nilobject_) | ||
364 | |||
365 | LUAI_DATA const TValue luaO_nilobject_; | ||
366 | |||
367 | #define ceillog2(x) (luaO_log2((x)-1) + 1) | ||
368 | |||
369 | LUAI_FUNC int luaO_log2 (unsigned int x); | ||
370 | LUAI_FUNC int luaO_int2fb (unsigned int x); | ||
371 | LUAI_FUNC int luaO_fb2int (int x); | ||
372 | LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2); | ||
373 | LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result); | ||
374 | LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt, | ||
375 | va_list argp); | ||
376 | LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...); | ||
377 | LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len); | ||
378 | |||
379 | |||
380 | #endif | ||
381 | |||
diff --git a/apps/plugins/lua/lopcodes.c b/apps/plugins/lua/lopcodes.c new file mode 100644 index 0000000000..4cc745230b --- /dev/null +++ b/apps/plugins/lua/lopcodes.c | |||
@@ -0,0 +1,102 @@ | |||
1 | /* | ||
2 | ** $Id: lopcodes.c,v 1.37.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** See Copyright Notice in lua.h | ||
4 | */ | ||
5 | |||
6 | |||
7 | #define lopcodes_c | ||
8 | #define LUA_CORE | ||
9 | |||
10 | |||
11 | #include "lopcodes.h" | ||
12 | |||
13 | |||
14 | /* ORDER OP */ | ||
15 | |||
16 | const char *const luaP_opnames[NUM_OPCODES+1] = { | ||
17 | "MOVE", | ||
18 | "LOADK", | ||
19 | "LOADBOOL", | ||
20 | "LOADNIL", | ||
21 | "GETUPVAL", | ||
22 | "GETGLOBAL", | ||
23 | "GETTABLE", | ||
24 | "SETGLOBAL", | ||
25 | "SETUPVAL", | ||
26 | "SETTABLE", | ||
27 | "NEWTABLE", | ||
28 | "SELF", | ||
29 | "ADD", | ||
30 | "SUB", | ||
31 | "MUL", | ||
32 | "DIV", | ||
33 | "MOD", | ||
34 | "POW", | ||
35 | "UNM", | ||
36 | "NOT", | ||
37 | "LEN", | ||
38 | "CONCAT", | ||
39 | "JMP", | ||
40 | "EQ", | ||
41 | "LT", | ||
42 | "LE", | ||
43 | "TEST", | ||
44 | "TESTSET", | ||
45 | "CALL", | ||
46 | "TAILCALL", | ||
47 | "RETURN", | ||
48 | "FORLOOP", | ||
49 | "FORPREP", | ||
50 | "TFORLOOP", | ||
51 | "SETLIST", | ||
52 | "CLOSE", | ||
53 | "CLOSURE", | ||
54 | "VARARG", | ||
55 | NULL | ||
56 | }; | ||
57 | |||
58 | |||
59 | #define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m)) | ||
60 | |||
61 | const lu_byte luaP_opmodes[NUM_OPCODES] = { | ||
62 | /* T A B C mode opcode */ | ||
63 | opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_MOVE */ | ||
64 | ,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_LOADK */ | ||
65 | ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_LOADBOOL */ | ||
66 | ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LOADNIL */ | ||
67 | ,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_GETUPVAL */ | ||
68 | ,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_GETGLOBAL */ | ||
69 | ,opmode(0, 1, OpArgR, OpArgK, iABC) /* OP_GETTABLE */ | ||
70 | ,opmode(0, 0, OpArgK, OpArgN, iABx) /* OP_SETGLOBAL */ | ||
71 | ,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_SETUPVAL */ | ||
72 | ,opmode(0, 0, OpArgK, OpArgK, iABC) /* OP_SETTABLE */ | ||
73 | ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_NEWTABLE */ | ||
74 | ,opmode(0, 1, OpArgR, OpArgK, iABC) /* OP_SELF */ | ||
75 | ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_ADD */ | ||
76 | ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_SUB */ | ||
77 | ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MUL */ | ||
78 | ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_DIV */ | ||
79 | ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_MOD */ | ||
80 | ,opmode(0, 1, OpArgK, OpArgK, iABC) /* OP_POW */ | ||
81 | ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_UNM */ | ||
82 | ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_NOT */ | ||
83 | ,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LEN */ | ||
84 | ,opmode(0, 1, OpArgR, OpArgR, iABC) /* OP_CONCAT */ | ||
85 | ,opmode(0, 0, OpArgR, OpArgN, iAsBx) /* OP_JMP */ | ||
86 | ,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_EQ */ | ||
87 | ,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LT */ | ||
88 | ,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LE */ | ||
89 | ,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TEST */ | ||
90 | ,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TESTSET */ | ||
91 | ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_CALL */ | ||
92 | ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_TAILCALL */ | ||
93 | ,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_RETURN */ | ||
94 | ,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORLOOP */ | ||
95 | ,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORPREP */ | ||
96 | ,opmode(1, 0, OpArgN, OpArgU, iABC) /* OP_TFORLOOP */ | ||
97 | ,opmode(0, 0, OpArgU, OpArgU, iABC) /* OP_SETLIST */ | ||
98 | ,opmode(0, 0, OpArgN, OpArgN, iABC) /* OP_CLOSE */ | ||
99 | ,opmode(0, 1, OpArgU, OpArgN, iABx) /* OP_CLOSURE */ | ||
100 | ,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_VARARG */ | ||
101 | }; | ||
102 | |||
diff --git a/apps/plugins/lua/lopcodes.h b/apps/plugins/lua/lopcodes.h new file mode 100644 index 0000000000..e1aed0f637 --- /dev/null +++ b/apps/plugins/lua/lopcodes.h | |||
@@ -0,0 +1,268 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Opcodes for Lua virtual machine | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lopcodes_h | ||
8 | #define lopcodes_h | ||
9 | |||
10 | #include "llimits.h" | ||
11 | |||
12 | |||
13 | /*=========================================================================== | ||
14 | We assume that instructions are unsigned numbers. | ||
15 | All instructions have an opcode in the first 6 bits. | ||
16 | Instructions can have the following fields: | ||
17 | `A' : 8 bits | ||
18 | `B' : 9 bits | ||
19 | `C' : 9 bits | ||
20 | `Bx' : 18 bits (`B' and `C' together) | ||
21 | `sBx' : signed Bx | ||
22 | |||
23 | A signed argument is represented in excess K; that is, the number | ||
24 | value is the unsigned value minus K. K is exactly the maximum value | ||
25 | for that argument (so that -max is represented by 0, and +max is | ||
26 | represented by 2*max), which is half the maximum for the corresponding | ||
27 | unsigned argument. | ||
28 | ===========================================================================*/ | ||
29 | |||
30 | |||
31 | enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ | ||
32 | |||
33 | |||
34 | /* | ||
35 | ** size and position of opcode arguments. | ||
36 | */ | ||
37 | #define SIZE_C 9 | ||
38 | #define SIZE_B 9 | ||
39 | #define SIZE_Bx (SIZE_C + SIZE_B) | ||
40 | #define SIZE_A 8 | ||
41 | |||
42 | #define SIZE_OP 6 | ||
43 | |||
44 | #define POS_OP 0 | ||
45 | #define POS_A (POS_OP + SIZE_OP) | ||
46 | #define POS_C (POS_A + SIZE_A) | ||
47 | #define POS_B (POS_C + SIZE_C) | ||
48 | #define POS_Bx POS_C | ||
49 | |||
50 | |||
51 | /* | ||
52 | ** limits for opcode arguments. | ||
53 | ** we use (signed) int to manipulate most arguments, | ||
54 | ** so they must fit in LUAI_BITSINT-1 bits (-1 for sign) | ||
55 | */ | ||
56 | #if SIZE_Bx < LUAI_BITSINT-1 | ||
57 | #define MAXARG_Bx ((1<<SIZE_Bx)-1) | ||
58 | #define MAXARG_sBx (MAXARG_Bx>>1) /* `sBx' is signed */ | ||
59 | #else | ||
60 | #define MAXARG_Bx MAX_INT | ||
61 | #define MAXARG_sBx MAX_INT | ||
62 | #endif | ||
63 | |||
64 | |||
65 | #define MAXARG_A ((1<<SIZE_A)-1) | ||
66 | #define MAXARG_B ((1<<SIZE_B)-1) | ||
67 | #define MAXARG_C ((1<<SIZE_C)-1) | ||
68 | |||
69 | |||
70 | /* creates a mask with `n' 1 bits at position `p' */ | ||
71 | #define MASK1(n,p) ((~((~(Instruction)0)<<n))<<p) | ||
72 | |||
73 | /* creates a mask with `n' 0 bits at position `p' */ | ||
74 | #define MASK0(n,p) (~MASK1(n,p)) | ||
75 | |||
76 | /* | ||
77 | ** the following macros help to manipulate instructions | ||
78 | */ | ||
79 | |||
80 | #define GET_OPCODE(i) (cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0))) | ||
81 | #define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \ | ||
82 | ((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP)))) | ||
83 | |||
84 | #define GETARG_A(i) (cast(int, ((i)>>POS_A) & MASK1(SIZE_A,0))) | ||
85 | #define SETARG_A(i,u) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \ | ||
86 | ((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A)))) | ||
87 | |||
88 | #define GETARG_B(i) (cast(int, ((i)>>POS_B) & MASK1(SIZE_B,0))) | ||
89 | #define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \ | ||
90 | ((cast(Instruction, b)<<POS_B)&MASK1(SIZE_B,POS_B)))) | ||
91 | |||
92 | #define GETARG_C(i) (cast(int, ((i)>>POS_C) & MASK1(SIZE_C,0))) | ||
93 | #define SETARG_C(i,b) ((i) = (((i)&MASK0(SIZE_C,POS_C)) | \ | ||
94 | ((cast(Instruction, b)<<POS_C)&MASK1(SIZE_C,POS_C)))) | ||
95 | |||
96 | #define GETARG_Bx(i) (cast(int, ((i)>>POS_Bx) & MASK1(SIZE_Bx,0))) | ||
97 | #define SETARG_Bx(i,b) ((i) = (((i)&MASK0(SIZE_Bx,POS_Bx)) | \ | ||
98 | ((cast(Instruction, b)<<POS_Bx)&MASK1(SIZE_Bx,POS_Bx)))) | ||
99 | |||
100 | #define GETARG_sBx(i) (GETARG_Bx(i)-MAXARG_sBx) | ||
101 | #define SETARG_sBx(i,b) SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx)) | ||
102 | |||
103 | |||
104 | #define CREATE_ABC(o,a,b,c) ((cast(Instruction, o)<<POS_OP) \ | ||
105 | | (cast(Instruction, a)<<POS_A) \ | ||
106 | | (cast(Instruction, b)<<POS_B) \ | ||
107 | | (cast(Instruction, c)<<POS_C)) | ||
108 | |||
109 | #define CREATE_ABx(o,a,bc) ((cast(Instruction, o)<<POS_OP) \ | ||
110 | | (cast(Instruction, a)<<POS_A) \ | ||
111 | | (cast(Instruction, bc)<<POS_Bx)) | ||
112 | |||
113 | |||
114 | /* | ||
115 | ** Macros to operate RK indices | ||
116 | */ | ||
117 | |||
118 | /* this bit 1 means constant (0 means register) */ | ||
119 | #define BITRK (1 << (SIZE_B - 1)) | ||
120 | |||
121 | /* test whether value is a constant */ | ||
122 | #define ISK(x) ((x) & BITRK) | ||
123 | |||
124 | /* gets the index of the constant */ | ||
125 | #define INDEXK(r) ((int)(r) & ~BITRK) | ||
126 | |||
127 | #define MAXINDEXRK (BITRK - 1) | ||
128 | |||
129 | /* code a constant index as a RK value */ | ||
130 | #define RKASK(x) ((x) | BITRK) | ||
131 | |||
132 | |||
133 | /* | ||
134 | ** invalid register that fits in 8 bits | ||
135 | */ | ||
136 | #define NO_REG MAXARG_A | ||
137 | |||
138 | |||
139 | /* | ||
140 | ** R(x) - register | ||
141 | ** Kst(x) - constant (in constant table) | ||
142 | ** RK(x) == if ISK(x) then Kst(INDEXK(x)) else R(x) | ||
143 | */ | ||
144 | |||
145 | |||
146 | /* | ||
147 | ** grep "ORDER OP" if you change these enums | ||
148 | */ | ||
149 | |||
150 | typedef enum { | ||
151 | /*---------------------------------------------------------------------- | ||
152 | name args description | ||
153 | ------------------------------------------------------------------------*/ | ||
154 | OP_MOVE,/* A B R(A) := R(B) */ | ||
155 | OP_LOADK,/* A Bx R(A) := Kst(Bx) */ | ||
156 | OP_LOADBOOL,/* A B C R(A) := (Bool)B; if (C) pc++ */ | ||
157 | OP_LOADNIL,/* A B R(A) := ... := R(B) := nil */ | ||
158 | OP_GETUPVAL,/* A B R(A) := UpValue[B] */ | ||
159 | |||
160 | OP_GETGLOBAL,/* A Bx R(A) := Gbl[Kst(Bx)] */ | ||
161 | OP_GETTABLE,/* A B C R(A) := R(B)[RK(C)] */ | ||
162 | |||
163 | OP_SETGLOBAL,/* A Bx Gbl[Kst(Bx)] := R(A) */ | ||
164 | OP_SETUPVAL,/* A B UpValue[B] := R(A) */ | ||
165 | OP_SETTABLE,/* A B C R(A)[RK(B)] := RK(C) */ | ||
166 | |||
167 | OP_NEWTABLE,/* A B C R(A) := {} (size = B,C) */ | ||
168 | |||
169 | OP_SELF,/* A B C R(A+1) := R(B); R(A) := R(B)[RK(C)] */ | ||
170 | |||
171 | OP_ADD,/* A B C R(A) := RK(B) + RK(C) */ | ||
172 | OP_SUB,/* A B C R(A) := RK(B) - RK(C) */ | ||
173 | OP_MUL,/* A B C R(A) := RK(B) * RK(C) */ | ||
174 | OP_DIV,/* A B C R(A) := RK(B) / RK(C) */ | ||
175 | OP_MOD,/* A B C R(A) := RK(B) % RK(C) */ | ||
176 | OP_POW,/* A B C R(A) := RK(B) ^ RK(C) */ | ||
177 | OP_UNM,/* A B R(A) := -R(B) */ | ||
178 | OP_NOT,/* A B R(A) := not R(B) */ | ||
179 | OP_LEN,/* A B R(A) := length of R(B) */ | ||
180 | |||
181 | OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */ | ||
182 | |||
183 | OP_JMP,/* sBx pc+=sBx */ | ||
184 | |||
185 | OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */ | ||
186 | OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */ | ||
187 | OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */ | ||
188 | |||
189 | OP_TEST,/* A C if not (R(A) <=> C) then pc++ */ | ||
190 | OP_TESTSET,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */ | ||
191 | |||
192 | OP_CALL,/* A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */ | ||
193 | OP_TAILCALL,/* A B C return R(A)(R(A+1), ... ,R(A+B-1)) */ | ||
194 | OP_RETURN,/* A B return R(A), ... ,R(A+B-2) (see note) */ | ||
195 | |||
196 | OP_FORLOOP,/* A sBx R(A)+=R(A+2); | ||
197 | if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/ | ||
198 | OP_FORPREP,/* A sBx R(A)-=R(A+2); pc+=sBx */ | ||
199 | |||
200 | OP_TFORLOOP,/* A C R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2)); | ||
201 | if R(A+3) ~= nil then R(A+2)=R(A+3) else pc++ */ | ||
202 | OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */ | ||
203 | |||
204 | OP_CLOSE,/* A close all variables in the stack up to (>=) R(A)*/ | ||
205 | OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n)) */ | ||
206 | |||
207 | OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */ | ||
208 | } OpCode; | ||
209 | |||
210 | |||
211 | #define NUM_OPCODES (cast(int, OP_VARARG) + 1) | ||
212 | |||
213 | |||
214 | |||
215 | /*=========================================================================== | ||
216 | Notes: | ||
217 | (*) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1, | ||
218 | and can be 0: OP_CALL then sets `top' to last_result+1, so | ||
219 | next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'. | ||
220 | |||
221 | (*) In OP_VARARG, if (B == 0) then use actual number of varargs and | ||
222 | set top (like in OP_CALL with C == 0). | ||
223 | |||
224 | (*) In OP_RETURN, if (B == 0) then return up to `top' | ||
225 | |||
226 | (*) In OP_SETLIST, if (B == 0) then B = `top'; | ||
227 | if (C == 0) then next `instruction' is real C | ||
228 | |||
229 | (*) For comparisons, A specifies what condition the test should accept | ||
230 | (true or false). | ||
231 | |||
232 | (*) All `skips' (pc++) assume that next instruction is a jump | ||
233 | ===========================================================================*/ | ||
234 | |||
235 | |||
236 | /* | ||
237 | ** masks for instruction properties. The format is: | ||
238 | ** bits 0-1: op mode | ||
239 | ** bits 2-3: C arg mode | ||
240 | ** bits 4-5: B arg mode | ||
241 | ** bit 6: instruction set register A | ||
242 | ** bit 7: operator is a test | ||
243 | */ | ||
244 | |||
245 | enum OpArgMask { | ||
246 | OpArgN, /* argument is not used */ | ||
247 | OpArgU, /* argument is used */ | ||
248 | OpArgR, /* argument is a register or a jump offset */ | ||
249 | OpArgK /* argument is a constant or register/constant */ | ||
250 | }; | ||
251 | |||
252 | LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES]; | ||
253 | |||
254 | #define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 3)) | ||
255 | #define getBMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3)) | ||
256 | #define getCMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 2) & 3)) | ||
257 | #define testAMode(m) (luaP_opmodes[m] & (1 << 6)) | ||
258 | #define testTMode(m) (luaP_opmodes[m] & (1 << 7)) | ||
259 | |||
260 | |||
261 | LUAI_DATA const char *const luaP_opnames[NUM_OPCODES+1]; /* opcode names */ | ||
262 | |||
263 | |||
264 | /* number of list items to accumulate before a SETLIST instruction */ | ||
265 | #define LFIELDS_PER_FLUSH 50 | ||
266 | |||
267 | |||
268 | #endif | ||
diff --git a/apps/plugins/lua/lparser.c b/apps/plugins/lua/lparser.c new file mode 100644 index 0000000000..800cdb1a3b --- /dev/null +++ b/apps/plugins/lua/lparser.c | |||
@@ -0,0 +1,1339 @@ | |||
1 | /* | ||
2 | ** $Id: lparser.c,v 2.42.1.3 2007/12/28 15:32:23 roberto Exp $ | ||
3 | ** Lua Parser | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <string.h> | ||
9 | |||
10 | #define lparser_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "lcode.h" | ||
16 | #include "ldebug.h" | ||
17 | #include "ldo.h" | ||
18 | #include "lfunc.h" | ||
19 | #include "llex.h" | ||
20 | #include "lmem.h" | ||
21 | #include "lobject.h" | ||
22 | #include "lopcodes.h" | ||
23 | #include "lparser.h" | ||
24 | #include "lstate.h" | ||
25 | #include "lstring.h" | ||
26 | #include "ltable.h" | ||
27 | |||
28 | |||
29 | |||
30 | #define hasmultret(k) ((k) == VCALL || (k) == VVARARG) | ||
31 | |||
32 | #define getlocvar(fs, i) ((fs)->f->locvars[(fs)->actvar[i]]) | ||
33 | |||
34 | #define luaY_checklimit(fs,v,l,m) if ((v)>(l)) errorlimit(fs,l,m) | ||
35 | |||
36 | |||
37 | /* | ||
38 | ** nodes for block list (list of active blocks) | ||
39 | */ | ||
40 | typedef struct BlockCnt { | ||
41 | struct BlockCnt *previous; /* chain */ | ||
42 | int breaklist; /* list of jumps out of this loop */ | ||
43 | lu_byte nactvar; /* # active locals outside the breakable structure */ | ||
44 | lu_byte upval; /* true if some variable in the block is an upvalue */ | ||
45 | lu_byte isbreakable; /* true if `block' is a loop */ | ||
46 | } BlockCnt; | ||
47 | |||
48 | |||
49 | |||
50 | /* | ||
51 | ** prototypes for recursive non-terminal functions | ||
52 | */ | ||
53 | static void chunk (LexState *ls); | ||
54 | static void expr (LexState *ls, expdesc *v); | ||
55 | |||
56 | |||
57 | static void anchor_token (LexState *ls) { | ||
58 | if (ls->t.token == TK_NAME || ls->t.token == TK_STRING) { | ||
59 | TString *ts = ls->t.seminfo.ts; | ||
60 | luaX_newstring(ls, getstr(ts), ts->tsv.len); | ||
61 | } | ||
62 | } | ||
63 | |||
64 | |||
65 | static void error_expected (LexState *ls, int token) { | ||
66 | luaX_syntaxerror(ls, | ||
67 | luaO_pushfstring(ls->L, LUA_QS " expected", luaX_token2str(ls, token))); | ||
68 | } | ||
69 | |||
70 | |||
71 | static void errorlimit (FuncState *fs, int limit, const char *what) { | ||
72 | const char *msg = (fs->f->linedefined == 0) ? | ||
73 | luaO_pushfstring(fs->L, "main function has more than %d %s", limit, what) : | ||
74 | luaO_pushfstring(fs->L, "function at line %d has more than %d %s", | ||
75 | fs->f->linedefined, limit, what); | ||
76 | luaX_lexerror(fs->ls, msg, 0); | ||
77 | } | ||
78 | |||
79 | |||
80 | static int testnext (LexState *ls, int c) { | ||
81 | if (ls->t.token == c) { | ||
82 | luaX_next(ls); | ||
83 | return 1; | ||
84 | } | ||
85 | else return 0; | ||
86 | } | ||
87 | |||
88 | |||
89 | static void check (LexState *ls, int c) { | ||
90 | if (ls->t.token != c) | ||
91 | error_expected(ls, c); | ||
92 | } | ||
93 | |||
94 | static void checknext (LexState *ls, int c) { | ||
95 | check(ls, c); | ||
96 | luaX_next(ls); | ||
97 | } | ||
98 | |||
99 | |||
100 | #define check_condition(ls,c,msg) { if (!(c)) luaX_syntaxerror(ls, msg); } | ||
101 | |||
102 | |||
103 | |||
104 | static void check_match (LexState *ls, int what, int who, int where) { | ||
105 | if (!testnext(ls, what)) { | ||
106 | if (where == ls->linenumber) | ||
107 | error_expected(ls, what); | ||
108 | else { | ||
109 | luaX_syntaxerror(ls, luaO_pushfstring(ls->L, | ||
110 | LUA_QS " expected (to close " LUA_QS " at line %d)", | ||
111 | luaX_token2str(ls, what), luaX_token2str(ls, who), where)); | ||
112 | } | ||
113 | } | ||
114 | } | ||
115 | |||
116 | |||
117 | static TString *str_checkname (LexState *ls) { | ||
118 | TString *ts; | ||
119 | check(ls, TK_NAME); | ||
120 | ts = ls->t.seminfo.ts; | ||
121 | luaX_next(ls); | ||
122 | return ts; | ||
123 | } | ||
124 | |||
125 | |||
126 | static void init_exp (expdesc *e, expkind k, int i) { | ||
127 | e->f = e->t = NO_JUMP; | ||
128 | e->k = k; | ||
129 | e->u.s.info = i; | ||
130 | } | ||
131 | |||
132 | |||
133 | static void codestring (LexState *ls, expdesc *e, TString *s) { | ||
134 | init_exp(e, VK, luaK_stringK(ls->fs, s)); | ||
135 | } | ||
136 | |||
137 | |||
138 | static void checkname(LexState *ls, expdesc *e) { | ||
139 | codestring(ls, e, str_checkname(ls)); | ||
140 | } | ||
141 | |||
142 | |||
143 | static int registerlocalvar (LexState *ls, TString *varname) { | ||
144 | FuncState *fs = ls->fs; | ||
145 | Proto *f = fs->f; | ||
146 | int oldsize = f->sizelocvars; | ||
147 | luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars, | ||
148 | LocVar, SHRT_MAX, "too many local variables"); | ||
149 | while (oldsize < f->sizelocvars) f->locvars[oldsize++].varname = NULL; | ||
150 | f->locvars[fs->nlocvars].varname = varname; | ||
151 | luaC_objbarrier(ls->L, f, varname); | ||
152 | return fs->nlocvars++; | ||
153 | } | ||
154 | |||
155 | |||
156 | #define new_localvarliteral(ls,v,n) \ | ||
157 | new_localvar(ls, luaX_newstring(ls, "" v, (sizeof(v)/sizeof(char))-1), n) | ||
158 | |||
159 | |||
160 | static void new_localvar (LexState *ls, TString *name, int n) { | ||
161 | FuncState *fs = ls->fs; | ||
162 | luaY_checklimit(fs, fs->nactvar+n+1, LUAI_MAXVARS, "local variables"); | ||
163 | fs->actvar[fs->nactvar+n] = cast(unsigned short, registerlocalvar(ls, name)); | ||
164 | } | ||
165 | |||
166 | |||
167 | static void adjustlocalvars (LexState *ls, int nvars) { | ||
168 | FuncState *fs = ls->fs; | ||
169 | fs->nactvar = cast_byte(fs->nactvar + nvars); | ||
170 | for (; nvars; nvars--) { | ||
171 | getlocvar(fs, fs->nactvar - nvars).startpc = fs->pc; | ||
172 | } | ||
173 | } | ||
174 | |||
175 | |||
176 | static void removevars (LexState *ls, int tolevel) { | ||
177 | FuncState *fs = ls->fs; | ||
178 | while (fs->nactvar > tolevel) | ||
179 | getlocvar(fs, --fs->nactvar).endpc = fs->pc; | ||
180 | } | ||
181 | |||
182 | |||
183 | static int indexupvalue (FuncState *fs, TString *name, expdesc *v) { | ||
184 | int i; | ||
185 | Proto *f = fs->f; | ||
186 | int oldsize = f->sizeupvalues; | ||
187 | for (i=0; i<f->nups; i++) { | ||
188 | if (fs->upvalues[i].k == v->k && fs->upvalues[i].info == v->u.s.info) { | ||
189 | lua_assert(f->upvalues[i] == name); | ||
190 | return i; | ||
191 | } | ||
192 | } | ||
193 | /* new one */ | ||
194 | luaY_checklimit(fs, f->nups + 1, LUAI_MAXUPVALUES, "upvalues"); | ||
195 | luaM_growvector(fs->L, f->upvalues, f->nups, f->sizeupvalues, | ||
196 | TString *, MAX_INT, ""); | ||
197 | while (oldsize < f->sizeupvalues) f->upvalues[oldsize++] = NULL; | ||
198 | f->upvalues[f->nups] = name; | ||
199 | luaC_objbarrier(fs->L, f, name); | ||
200 | lua_assert(v->k == VLOCAL || v->k == VUPVAL); | ||
201 | fs->upvalues[f->nups].k = cast_byte(v->k); | ||
202 | fs->upvalues[f->nups].info = cast_byte(v->u.s.info); | ||
203 | return f->nups++; | ||
204 | } | ||
205 | |||
206 | |||
207 | static int searchvar (FuncState *fs, TString *n) { | ||
208 | int i; | ||
209 | for (i=fs->nactvar-1; i >= 0; i--) { | ||
210 | if (n == getlocvar(fs, i).varname) | ||
211 | return i; | ||
212 | } | ||
213 | return -1; /* not found */ | ||
214 | } | ||
215 | |||
216 | |||
217 | static void markupval (FuncState *fs, int level) { | ||
218 | BlockCnt *bl = fs->bl; | ||
219 | while (bl && bl->nactvar > level) bl = bl->previous; | ||
220 | if (bl) bl->upval = 1; | ||
221 | } | ||
222 | |||
223 | |||
224 | static int singlevaraux (FuncState *fs, TString *n, expdesc *var, int base) { | ||
225 | if (fs == NULL) { /* no more levels? */ | ||
226 | init_exp(var, VGLOBAL, NO_REG); /* default is global variable */ | ||
227 | return VGLOBAL; | ||
228 | } | ||
229 | else { | ||
230 | int v = searchvar(fs, n); /* look up at current level */ | ||
231 | if (v >= 0) { | ||
232 | init_exp(var, VLOCAL, v); | ||
233 | if (!base) | ||
234 | markupval(fs, v); /* local will be used as an upval */ | ||
235 | return VLOCAL; | ||
236 | } | ||
237 | else { /* not found at current level; try upper one */ | ||
238 | if (singlevaraux(fs->prev, n, var, 0) == VGLOBAL) | ||
239 | return VGLOBAL; | ||
240 | var->u.s.info = indexupvalue(fs, n, var); /* else was LOCAL or UPVAL */ | ||
241 | var->k = VUPVAL; /* upvalue in this level */ | ||
242 | return VUPVAL; | ||
243 | } | ||
244 | } | ||
245 | } | ||
246 | |||
247 | |||
248 | static void singlevar (LexState *ls, expdesc *var) { | ||
249 | TString *varname = str_checkname(ls); | ||
250 | FuncState *fs = ls->fs; | ||
251 | if (singlevaraux(fs, varname, var, 1) == VGLOBAL) | ||
252 | var->u.s.info = luaK_stringK(fs, varname); /* info points to global name */ | ||
253 | } | ||
254 | |||
255 | |||
256 | static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) { | ||
257 | FuncState *fs = ls->fs; | ||
258 | int extra = nvars - nexps; | ||
259 | if (hasmultret(e->k)) { | ||
260 | extra++; /* includes call itself */ | ||
261 | if (extra < 0) extra = 0; | ||
262 | luaK_setreturns(fs, e, extra); /* last exp. provides the difference */ | ||
263 | if (extra > 1) luaK_reserveregs(fs, extra-1); | ||
264 | } | ||
265 | else { | ||
266 | if (e->k != VVOID) luaK_exp2nextreg(fs, e); /* close last expression */ | ||
267 | if (extra > 0) { | ||
268 | int reg = fs->freereg; | ||
269 | luaK_reserveregs(fs, extra); | ||
270 | luaK_nil(fs, reg, extra); | ||
271 | } | ||
272 | } | ||
273 | } | ||
274 | |||
275 | |||
276 | static void enterlevel (LexState *ls) { | ||
277 | if (++ls->L->nCcalls > LUAI_MAXCCALLS) | ||
278 | luaX_lexerror(ls, "chunk has too many syntax levels", 0); | ||
279 | } | ||
280 | |||
281 | |||
282 | #define leavelevel(ls) ((ls)->L->nCcalls--) | ||
283 | |||
284 | |||
285 | static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isbreakable) { | ||
286 | bl->breaklist = NO_JUMP; | ||
287 | bl->isbreakable = isbreakable; | ||
288 | bl->nactvar = fs->nactvar; | ||
289 | bl->upval = 0; | ||
290 | bl->previous = fs->bl; | ||
291 | fs->bl = bl; | ||
292 | lua_assert(fs->freereg == fs->nactvar); | ||
293 | } | ||
294 | |||
295 | |||
296 | static void leaveblock (FuncState *fs) { | ||
297 | BlockCnt *bl = fs->bl; | ||
298 | fs->bl = bl->previous; | ||
299 | removevars(fs->ls, bl->nactvar); | ||
300 | if (bl->upval) | ||
301 | luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0); | ||
302 | /* a block either controls scope or breaks (never both) */ | ||
303 | lua_assert(!bl->isbreakable || !bl->upval); | ||
304 | lua_assert(bl->nactvar == fs->nactvar); | ||
305 | fs->freereg = fs->nactvar; /* free registers */ | ||
306 | luaK_patchtohere(fs, bl->breaklist); | ||
307 | } | ||
308 | |||
309 | |||
310 | static void pushclosure (LexState *ls, FuncState *func, expdesc *v) { | ||
311 | FuncState *fs = ls->fs; | ||
312 | Proto *f = fs->f; | ||
313 | int oldsize = f->sizep; | ||
314 | int i; | ||
315 | luaM_growvector(ls->L, f->p, fs->np, f->sizep, Proto *, | ||
316 | MAXARG_Bx, "constant table overflow"); | ||
317 | while (oldsize < f->sizep) f->p[oldsize++] = NULL; | ||
318 | f->p[fs->np++] = func->f; | ||
319 | luaC_objbarrier(ls->L, f, func->f); | ||
320 | init_exp(v, VRELOCABLE, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np-1)); | ||
321 | for (i=0; i<func->f->nups; i++) { | ||
322 | OpCode o = (func->upvalues[i].k == VLOCAL) ? OP_MOVE : OP_GETUPVAL; | ||
323 | luaK_codeABC(fs, o, 0, func->upvalues[i].info, 0); | ||
324 | } | ||
325 | } | ||
326 | |||
327 | |||
328 | static void lparser_open_func (LexState *ls, FuncState *fs) { | ||
329 | lua_State *L = ls->L; | ||
330 | Proto *f = luaF_newproto(L); | ||
331 | fs->f = f; | ||
332 | fs->prev = ls->fs; /* linked list of funcstates */ | ||
333 | fs->ls = ls; | ||
334 | fs->L = L; | ||
335 | ls->fs = fs; | ||
336 | fs->pc = 0; | ||
337 | fs->lasttarget = -1; | ||
338 | fs->jpc = NO_JUMP; | ||
339 | fs->freereg = 0; | ||
340 | fs->nk = 0; | ||
341 | fs->np = 0; | ||
342 | fs->nlocvars = 0; | ||
343 | fs->nactvar = 0; | ||
344 | fs->bl = NULL; | ||
345 | f->source = ls->source; | ||
346 | f->maxstacksize = 2; /* registers 0/1 are always valid */ | ||
347 | fs->h = luaH_new(L, 0, 0); | ||
348 | /* anchor table of constants and prototype (to avoid being collected) */ | ||
349 | sethvalue2s(L, L->top, fs->h); | ||
350 | incr_top(L); | ||
351 | setptvalue2s(L, L->top, f); | ||
352 | incr_top(L); | ||
353 | } | ||
354 | |||
355 | |||
356 | static void close_func (LexState *ls) { | ||
357 | lua_State *L = ls->L; | ||
358 | FuncState *fs = ls->fs; | ||
359 | Proto *f = fs->f; | ||
360 | removevars(ls, 0); | ||
361 | luaK_ret(fs, 0, 0); /* final return */ | ||
362 | luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction); | ||
363 | f->sizecode = fs->pc; | ||
364 | luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int); | ||
365 | f->sizelineinfo = fs->pc; | ||
366 | luaM_reallocvector(L, f->k, f->sizek, fs->nk, TValue); | ||
367 | f->sizek = fs->nk; | ||
368 | luaM_reallocvector(L, f->p, f->sizep, fs->np, Proto *); | ||
369 | f->sizep = fs->np; | ||
370 | luaM_reallocvector(L, f->locvars, f->sizelocvars, fs->nlocvars, LocVar); | ||
371 | f->sizelocvars = fs->nlocvars; | ||
372 | luaM_reallocvector(L, f->upvalues, f->sizeupvalues, f->nups, TString *); | ||
373 | f->sizeupvalues = f->nups; | ||
374 | lua_assert(luaG_checkcode(f)); | ||
375 | lua_assert(fs->bl == NULL); | ||
376 | ls->fs = fs->prev; | ||
377 | L->top -= 2; /* remove table and prototype from the stack */ | ||
378 | /* last token read was anchored in defunct function; must reanchor it */ | ||
379 | if (fs) anchor_token(ls); | ||
380 | } | ||
381 | |||
382 | |||
383 | Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, const char *name) { | ||
384 | struct LexState lexstate; | ||
385 | struct FuncState funcstate; | ||
386 | lexstate.buff = buff; | ||
387 | luaX_setinput(L, &lexstate, z, luaS_new(L, name)); | ||
388 | lparser_open_func(&lexstate, &funcstate); | ||
389 | funcstate.f->is_vararg = VARARG_ISVARARG; /* main func. is always vararg */ | ||
390 | luaX_next(&lexstate); /* read first token */ | ||
391 | chunk(&lexstate); | ||
392 | check(&lexstate, TK_EOS); | ||
393 | close_func(&lexstate); | ||
394 | lua_assert(funcstate.prev == NULL); | ||
395 | lua_assert(funcstate.f->nups == 0); | ||
396 | lua_assert(lexstate.fs == NULL); | ||
397 | return funcstate.f; | ||
398 | } | ||
399 | |||
400 | |||
401 | |||
402 | /*============================================================*/ | ||
403 | /* GRAMMAR RULES */ | ||
404 | /*============================================================*/ | ||
405 | |||
406 | |||
407 | static void field (LexState *ls, expdesc *v) { | ||
408 | /* field -> ['.' | ':'] NAME */ | ||
409 | FuncState *fs = ls->fs; | ||
410 | expdesc key; | ||
411 | luaK_exp2anyreg(fs, v); | ||
412 | luaX_next(ls); /* skip the dot or colon */ | ||
413 | checkname(ls, &key); | ||
414 | luaK_indexed(fs, v, &key); | ||
415 | } | ||
416 | |||
417 | |||
418 | static void yindex (LexState *ls, expdesc *v) { | ||
419 | /* index -> '[' expr ']' */ | ||
420 | luaX_next(ls); /* skip the '[' */ | ||
421 | expr(ls, v); | ||
422 | luaK_exp2val(ls->fs, v); | ||
423 | checknext(ls, ']'); | ||
424 | } | ||
425 | |||
426 | |||
427 | /* | ||
428 | ** {====================================================================== | ||
429 | ** Rules for Constructors | ||
430 | ** ======================================================================= | ||
431 | */ | ||
432 | |||
433 | |||
434 | struct ConsControl { | ||
435 | expdesc v; /* last list item read */ | ||
436 | expdesc *t; /* table descriptor */ | ||
437 | int nh; /* total number of `record' elements */ | ||
438 | int na; /* total number of array elements */ | ||
439 | int tostore; /* number of array elements pending to be stored */ | ||
440 | }; | ||
441 | |||
442 | |||
443 | static void recfield (LexState *ls, struct ConsControl *cc) { | ||
444 | /* recfield -> (NAME | `['exp1`]') = exp1 */ | ||
445 | FuncState *fs = ls->fs; | ||
446 | int reg = ls->fs->freereg; | ||
447 | expdesc key, val; | ||
448 | int rkkey; | ||
449 | if (ls->t.token == TK_NAME) { | ||
450 | luaY_checklimit(fs, cc->nh, MAX_INT, "items in a constructor"); | ||
451 | checkname(ls, &key); | ||
452 | } | ||
453 | else /* ls->t.token == '[' */ | ||
454 | yindex(ls, &key); | ||
455 | cc->nh++; | ||
456 | checknext(ls, '='); | ||
457 | rkkey = luaK_exp2RK(fs, &key); | ||
458 | expr(ls, &val); | ||
459 | luaK_codeABC(fs, OP_SETTABLE, cc->t->u.s.info, rkkey, luaK_exp2RK(fs, &val)); | ||
460 | fs->freereg = reg; /* free registers */ | ||
461 | } | ||
462 | |||
463 | |||
464 | static void closelistfield (FuncState *fs, struct ConsControl *cc) { | ||
465 | if (cc->v.k == VVOID) return; /* there is no list item */ | ||
466 | luaK_exp2nextreg(fs, &cc->v); | ||
467 | cc->v.k = VVOID; | ||
468 | if (cc->tostore == LFIELDS_PER_FLUSH) { | ||
469 | luaK_setlist(fs, cc->t->u.s.info, cc->na, cc->tostore); /* flush */ | ||
470 | cc->tostore = 0; /* no more items pending */ | ||
471 | } | ||
472 | } | ||
473 | |||
474 | |||
475 | static void lastlistfield (FuncState *fs, struct ConsControl *cc) { | ||
476 | if (cc->tostore == 0) return; | ||
477 | if (hasmultret(cc->v.k)) { | ||
478 | luaK_setmultret(fs, &cc->v); | ||
479 | luaK_setlist(fs, cc->t->u.s.info, cc->na, LUA_MULTRET); | ||
480 | cc->na--; /* do not count last expression (unknown number of elements) */ | ||
481 | } | ||
482 | else { | ||
483 | if (cc->v.k != VVOID) | ||
484 | luaK_exp2nextreg(fs, &cc->v); | ||
485 | luaK_setlist(fs, cc->t->u.s.info, cc->na, cc->tostore); | ||
486 | } | ||
487 | } | ||
488 | |||
489 | |||
490 | static void listfield (LexState *ls, struct ConsControl *cc) { | ||
491 | expr(ls, &cc->v); | ||
492 | luaY_checklimit(ls->fs, cc->na, MAX_INT, "items in a constructor"); | ||
493 | cc->na++; | ||
494 | cc->tostore++; | ||
495 | } | ||
496 | |||
497 | |||
498 | static void constructor (LexState *ls, expdesc *t) { | ||
499 | /* constructor -> ?? */ | ||
500 | FuncState *fs = ls->fs; | ||
501 | int line = ls->linenumber; | ||
502 | int pc = luaK_codeABC(fs, OP_NEWTABLE, 0, 0, 0); | ||
503 | struct ConsControl cc; | ||
504 | cc.na = cc.nh = cc.tostore = 0; | ||
505 | cc.t = t; | ||
506 | init_exp(t, VRELOCABLE, pc); | ||
507 | init_exp(&cc.v, VVOID, 0); /* no value (yet) */ | ||
508 | luaK_exp2nextreg(ls->fs, t); /* fix it at stack top (for gc) */ | ||
509 | checknext(ls, '{'); | ||
510 | do { | ||
511 | lua_assert(cc.v.k == VVOID || cc.tostore > 0); | ||
512 | if (ls->t.token == '}') break; | ||
513 | closelistfield(fs, &cc); | ||
514 | switch(ls->t.token) { | ||
515 | case TK_NAME: { /* may be listfields or recfields */ | ||
516 | luaX_lookahead(ls); | ||
517 | if (ls->lookahead.token != '=') /* expression? */ | ||
518 | listfield(ls, &cc); | ||
519 | else | ||
520 | recfield(ls, &cc); | ||
521 | break; | ||
522 | } | ||
523 | case '[': { /* constructor_item -> recfield */ | ||
524 | recfield(ls, &cc); | ||
525 | break; | ||
526 | } | ||
527 | default: { /* constructor_part -> listfield */ | ||
528 | listfield(ls, &cc); | ||
529 | break; | ||
530 | } | ||
531 | } | ||
532 | } while (testnext(ls, ',') || testnext(ls, ';')); | ||
533 | check_match(ls, '}', '{', line); | ||
534 | lastlistfield(fs, &cc); | ||
535 | SETARG_B(fs->f->code[pc], luaO_int2fb(cc.na)); /* set initial array size */ | ||
536 | SETARG_C(fs->f->code[pc], luaO_int2fb(cc.nh)); /* set initial table size */ | ||
537 | } | ||
538 | |||
539 | /* }====================================================================== */ | ||
540 | |||
541 | |||
542 | |||
543 | static void parlist (LexState *ls) { | ||
544 | /* parlist -> [ param { `,' param } ] */ | ||
545 | FuncState *fs = ls->fs; | ||
546 | Proto *f = fs->f; | ||
547 | int nparams = 0; | ||
548 | f->is_vararg = 0; | ||
549 | if (ls->t.token != ')') { /* is `parlist' not empty? */ | ||
550 | do { | ||
551 | switch (ls->t.token) { | ||
552 | case TK_NAME: { /* param -> NAME */ | ||
553 | new_localvar(ls, str_checkname(ls), nparams++); | ||
554 | break; | ||
555 | } | ||
556 | case TK_DOTS: { /* param -> `...' */ | ||
557 | luaX_next(ls); | ||
558 | #if defined(LUA_COMPAT_VARARG) | ||
559 | /* use `arg' as default name */ | ||
560 | new_localvarliteral(ls, "arg", nparams++); | ||
561 | f->is_vararg = VARARG_HASARG | VARARG_NEEDSARG; | ||
562 | #endif | ||
563 | f->is_vararg |= VARARG_ISVARARG; | ||
564 | break; | ||
565 | } | ||
566 | default: luaX_syntaxerror(ls, "<name> or " LUA_QL("...") " expected"); | ||
567 | } | ||
568 | } while (!f->is_vararg && testnext(ls, ',')); | ||
569 | } | ||
570 | adjustlocalvars(ls, nparams); | ||
571 | f->numparams = cast_byte(fs->nactvar - (f->is_vararg & VARARG_HASARG)); | ||
572 | luaK_reserveregs(fs, fs->nactvar); /* reserve register for parameters */ | ||
573 | } | ||
574 | |||
575 | |||
576 | static void body (LexState *ls, expdesc *e, int needself, int line) { | ||
577 | /* body -> `(' parlist `)' chunk END */ | ||
578 | FuncState new_fs; | ||
579 | lparser_open_func(ls, &new_fs); | ||
580 | new_fs.f->linedefined = line; | ||
581 | checknext(ls, '('); | ||
582 | if (needself) { | ||
583 | new_localvarliteral(ls, "self", 0); | ||
584 | adjustlocalvars(ls, 1); | ||
585 | } | ||
586 | parlist(ls); | ||
587 | checknext(ls, ')'); | ||
588 | chunk(ls); | ||
589 | new_fs.f->lastlinedefined = ls->linenumber; | ||
590 | check_match(ls, TK_END, TK_FUNCTION, line); | ||
591 | close_func(ls); | ||
592 | pushclosure(ls, &new_fs, e); | ||
593 | } | ||
594 | |||
595 | |||
596 | static int explist1 (LexState *ls, expdesc *v) { | ||
597 | /* explist1 -> expr { `,' expr } */ | ||
598 | int n = 1; /* at least one expression */ | ||
599 | expr(ls, v); | ||
600 | while (testnext(ls, ',')) { | ||
601 | luaK_exp2nextreg(ls->fs, v); | ||
602 | expr(ls, v); | ||
603 | n++; | ||
604 | } | ||
605 | return n; | ||
606 | } | ||
607 | |||
608 | |||
609 | static void funcargs (LexState *ls, expdesc *f) { | ||
610 | FuncState *fs = ls->fs; | ||
611 | expdesc args; | ||
612 | int base, nparams; | ||
613 | int line = ls->linenumber; | ||
614 | switch (ls->t.token) { | ||
615 | case '(': { /* funcargs -> `(' [ explist1 ] `)' */ | ||
616 | if (line != ls->lastline) | ||
617 | luaX_syntaxerror(ls,"ambiguous syntax (function call x new statement)"); | ||
618 | luaX_next(ls); | ||
619 | if (ls->t.token == ')') /* arg list is empty? */ | ||
620 | args.k = VVOID; | ||
621 | else { | ||
622 | explist1(ls, &args); | ||
623 | luaK_setmultret(fs, &args); | ||
624 | } | ||
625 | check_match(ls, ')', '(', line); | ||
626 | break; | ||
627 | } | ||
628 | case '{': { /* funcargs -> constructor */ | ||
629 | constructor(ls, &args); | ||
630 | break; | ||
631 | } | ||
632 | case TK_STRING: { /* funcargs -> STRING */ | ||
633 | codestring(ls, &args, ls->t.seminfo.ts); | ||
634 | luaX_next(ls); /* must use `seminfo' before `next' */ | ||
635 | break; | ||
636 | } | ||
637 | default: { | ||
638 | luaX_syntaxerror(ls, "function arguments expected"); | ||
639 | return; | ||
640 | } | ||
641 | } | ||
642 | lua_assert(f->k == VNONRELOC); | ||
643 | base = f->u.s.info; /* base register for call */ | ||
644 | if (hasmultret(args.k)) | ||
645 | nparams = LUA_MULTRET; /* open call */ | ||
646 | else { | ||
647 | if (args.k != VVOID) | ||
648 | luaK_exp2nextreg(fs, &args); /* close last argument */ | ||
649 | nparams = fs->freereg - (base+1); | ||
650 | } | ||
651 | init_exp(f, VCALL, luaK_codeABC(fs, OP_CALL, base, nparams+1, 2)); | ||
652 | luaK_fixline(fs, line); | ||
653 | fs->freereg = base+1; /* call remove function and arguments and leaves | ||
654 | (unless changed) one result */ | ||
655 | } | ||
656 | |||
657 | |||
658 | |||
659 | |||
660 | /* | ||
661 | ** {====================================================================== | ||
662 | ** Expression parsing | ||
663 | ** ======================================================================= | ||
664 | */ | ||
665 | |||
666 | |||
667 | static void prefixexp (LexState *ls, expdesc *v) { | ||
668 | /* prefixexp -> NAME | '(' expr ')' */ | ||
669 | switch (ls->t.token) { | ||
670 | case '(': { | ||
671 | int line = ls->linenumber; | ||
672 | luaX_next(ls); | ||
673 | expr(ls, v); | ||
674 | check_match(ls, ')', '(', line); | ||
675 | luaK_dischargevars(ls->fs, v); | ||
676 | return; | ||
677 | } | ||
678 | case TK_NAME: { | ||
679 | singlevar(ls, v); | ||
680 | return; | ||
681 | } | ||
682 | default: { | ||
683 | luaX_syntaxerror(ls, "unexpected symbol"); | ||
684 | return; | ||
685 | } | ||
686 | } | ||
687 | } | ||
688 | |||
689 | |||
690 | static void primaryexp (LexState *ls, expdesc *v) { | ||
691 | /* primaryexp -> | ||
692 | prefixexp { `.' NAME | `[' exp `]' | `:' NAME funcargs | funcargs } */ | ||
693 | FuncState *fs = ls->fs; | ||
694 | prefixexp(ls, v); | ||
695 | for (;;) { | ||
696 | switch (ls->t.token) { | ||
697 | case '.': { /* field */ | ||
698 | field(ls, v); | ||
699 | break; | ||
700 | } | ||
701 | case '[': { /* `[' exp1 `]' */ | ||
702 | expdesc key; | ||
703 | luaK_exp2anyreg(fs, v); | ||
704 | yindex(ls, &key); | ||
705 | luaK_indexed(fs, v, &key); | ||
706 | break; | ||
707 | } | ||
708 | case ':': { /* `:' NAME funcargs */ | ||
709 | expdesc key; | ||
710 | luaX_next(ls); | ||
711 | checkname(ls, &key); | ||
712 | luaK_self(fs, v, &key); | ||
713 | funcargs(ls, v); | ||
714 | break; | ||
715 | } | ||
716 | case '(': case TK_STRING: case '{': { /* funcargs */ | ||
717 | luaK_exp2nextreg(fs, v); | ||
718 | funcargs(ls, v); | ||
719 | break; | ||
720 | } | ||
721 | default: return; | ||
722 | } | ||
723 | } | ||
724 | } | ||
725 | |||
726 | |||
727 | static void simpleexp (LexState *ls, expdesc *v) { | ||
728 | /* simpleexp -> NUMBER | STRING | NIL | true | false | ... | | ||
729 | constructor | FUNCTION body | primaryexp */ | ||
730 | switch (ls->t.token) { | ||
731 | case TK_NUMBER: { | ||
732 | init_exp(v, VKNUM, 0); | ||
733 | v->u.nval = ls->t.seminfo.r; | ||
734 | break; | ||
735 | } | ||
736 | case TK_STRING: { | ||
737 | codestring(ls, v, ls->t.seminfo.ts); | ||
738 | break; | ||
739 | } | ||
740 | case TK_NIL: { | ||
741 | init_exp(v, VNIL, 0); | ||
742 | break; | ||
743 | } | ||
744 | case TK_TRUE: { | ||
745 | init_exp(v, VTRUE, 0); | ||
746 | break; | ||
747 | } | ||
748 | case TK_FALSE: { | ||
749 | init_exp(v, VFALSE, 0); | ||
750 | break; | ||
751 | } | ||
752 | case TK_DOTS: { /* vararg */ | ||
753 | FuncState *fs = ls->fs; | ||
754 | check_condition(ls, fs->f->is_vararg, | ||
755 | "cannot use " LUA_QL("...") " outside a vararg function"); | ||
756 | fs->f->is_vararg &= ~VARARG_NEEDSARG; /* don't need 'arg' */ | ||
757 | init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 1, 0)); | ||
758 | break; | ||
759 | } | ||
760 | case '{': { /* constructor */ | ||
761 | constructor(ls, v); | ||
762 | return; | ||
763 | } | ||
764 | case TK_FUNCTION: { | ||
765 | luaX_next(ls); | ||
766 | body(ls, v, 0, ls->linenumber); | ||
767 | return; | ||
768 | } | ||
769 | default: { | ||
770 | primaryexp(ls, v); | ||
771 | return; | ||
772 | } | ||
773 | } | ||
774 | luaX_next(ls); | ||
775 | } | ||
776 | |||
777 | |||
778 | static UnOpr getunopr (int op) { | ||
779 | switch (op) { | ||
780 | case TK_NOT: return OPR_NOT; | ||
781 | case '-': return OPR_MINUS; | ||
782 | case '#': return OPR_LEN; | ||
783 | default: return OPR_NOUNOPR; | ||
784 | } | ||
785 | } | ||
786 | |||
787 | |||
788 | static BinOpr getbinopr (int op) { | ||
789 | switch (op) { | ||
790 | case '+': return OPR_ADD; | ||
791 | case '-': return OPR_SUB; | ||
792 | case '*': return OPR_MUL; | ||
793 | case '/': return OPR_DIV; | ||
794 | case '%': return OPR_MOD; | ||
795 | case '^': return OPR_POW; | ||
796 | case TK_CONCAT: return OPR_CONCAT; | ||
797 | case TK_NE: return OPR_NE; | ||
798 | case TK_EQ: return OPR_EQ; | ||
799 | case '<': return OPR_LT; | ||
800 | case TK_LE: return OPR_LE; | ||
801 | case '>': return OPR_GT; | ||
802 | case TK_GE: return OPR_GE; | ||
803 | case TK_AND: return OPR_AND; | ||
804 | case TK_OR: return OPR_OR; | ||
805 | default: return OPR_NOBINOPR; | ||
806 | } | ||
807 | } | ||
808 | |||
809 | |||
810 | static const struct { | ||
811 | lu_byte left; /* left priority for each binary operator */ | ||
812 | lu_byte right; /* right priority */ | ||
813 | } priority[] = { /* ORDER OPR */ | ||
814 | {6, 6}, {6, 6}, {7, 7}, {7, 7}, {7, 7}, /* `+' `-' `/' `%' */ | ||
815 | {10, 9}, {5, 4}, /* power and concat (right associative) */ | ||
816 | {3, 3}, {3, 3}, /* equality and inequality */ | ||
817 | {3, 3}, {3, 3}, {3, 3}, {3, 3}, /* order */ | ||
818 | {2, 2}, {1, 1} /* logical (and/or) */ | ||
819 | }; | ||
820 | |||
821 | #define UNARY_PRIORITY 8 /* priority for unary operators */ | ||
822 | |||
823 | |||
824 | /* | ||
825 | ** subexpr -> (simpleexp | unop subexpr) { binop subexpr } | ||
826 | ** where `binop' is any binary operator with a priority higher than `limit' | ||
827 | */ | ||
828 | static BinOpr subexpr (LexState *ls, expdesc *v, unsigned int limit) { | ||
829 | BinOpr op; | ||
830 | UnOpr uop; | ||
831 | enterlevel(ls); | ||
832 | uop = getunopr(ls->t.token); | ||
833 | if (uop != OPR_NOUNOPR) { | ||
834 | luaX_next(ls); | ||
835 | subexpr(ls, v, UNARY_PRIORITY); | ||
836 | luaK_prefix(ls->fs, uop, v); | ||
837 | } | ||
838 | else simpleexp(ls, v); | ||
839 | /* expand while operators have priorities higher than `limit' */ | ||
840 | op = getbinopr(ls->t.token); | ||
841 | while (op != OPR_NOBINOPR && priority[op].left > limit) { | ||
842 | expdesc v2; | ||
843 | BinOpr nextop; | ||
844 | luaX_next(ls); | ||
845 | luaK_infix(ls->fs, op, v); | ||
846 | /* read sub-expression with higher priority */ | ||
847 | nextop = subexpr(ls, &v2, priority[op].right); | ||
848 | luaK_posfix(ls->fs, op, v, &v2); | ||
849 | op = nextop; | ||
850 | } | ||
851 | leavelevel(ls); | ||
852 | return op; /* return first untreated operator */ | ||
853 | } | ||
854 | |||
855 | |||
856 | static void expr (LexState *ls, expdesc *v) { | ||
857 | subexpr(ls, v, 0); | ||
858 | } | ||
859 | |||
860 | /* }==================================================================== */ | ||
861 | |||
862 | |||
863 | |||
864 | /* | ||
865 | ** {====================================================================== | ||
866 | ** Rules for Statements | ||
867 | ** ======================================================================= | ||
868 | */ | ||
869 | |||
870 | |||
871 | static int block_follow (int token) { | ||
872 | switch (token) { | ||
873 | case TK_ELSE: case TK_ELSEIF: case TK_END: | ||
874 | case TK_UNTIL: case TK_EOS: | ||
875 | return 1; | ||
876 | default: return 0; | ||
877 | } | ||
878 | } | ||
879 | |||
880 | |||
881 | static void block (LexState *ls) { | ||
882 | /* block -> chunk */ | ||
883 | FuncState *fs = ls->fs; | ||
884 | BlockCnt bl; | ||
885 | enterblock(fs, &bl, 0); | ||
886 | chunk(ls); | ||
887 | lua_assert(bl.breaklist == NO_JUMP); | ||
888 | leaveblock(fs); | ||
889 | } | ||
890 | |||
891 | |||
892 | /* | ||
893 | ** structure to chain all variables in the left-hand side of an | ||
894 | ** assignment | ||
895 | */ | ||
896 | struct LHS_assign { | ||
897 | struct LHS_assign *prev; | ||
898 | expdesc v; /* variable (global, local, upvalue, or indexed) */ | ||
899 | }; | ||
900 | |||
901 | |||
902 | /* | ||
903 | ** check whether, in an assignment to a local variable, the local variable | ||
904 | ** is needed in a previous assignment (to a table). If so, save original | ||
905 | ** local value in a safe place and use this safe copy in the previous | ||
906 | ** assignment. | ||
907 | */ | ||
908 | static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) { | ||
909 | FuncState *fs = ls->fs; | ||
910 | int extra = fs->freereg; /* eventual position to save local variable */ | ||
911 | int conflict = 0; | ||
912 | for (; lh; lh = lh->prev) { | ||
913 | if (lh->v.k == VINDEXED) { | ||
914 | if (lh->v.u.s.info == v->u.s.info) { /* conflict? */ | ||
915 | conflict = 1; | ||
916 | lh->v.u.s.info = extra; /* previous assignment will use safe copy */ | ||
917 | } | ||
918 | if (lh->v.u.s.aux == v->u.s.info) { /* conflict? */ | ||
919 | conflict = 1; | ||
920 | lh->v.u.s.aux = extra; /* previous assignment will use safe copy */ | ||
921 | } | ||
922 | } | ||
923 | } | ||
924 | if (conflict) { | ||
925 | luaK_codeABC(fs, OP_MOVE, fs->freereg, v->u.s.info, 0); /* make copy */ | ||
926 | luaK_reserveregs(fs, 1); | ||
927 | } | ||
928 | } | ||
929 | |||
930 | |||
931 | static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) { | ||
932 | expdesc e; | ||
933 | check_condition(ls, VLOCAL <= lh->v.k && lh->v.k <= VINDEXED, | ||
934 | "syntax error"); | ||
935 | if (testnext(ls, ',')) { /* assignment -> `,' primaryexp assignment */ | ||
936 | struct LHS_assign nv; | ||
937 | nv.prev = lh; | ||
938 | primaryexp(ls, &nv.v); | ||
939 | if (nv.v.k == VLOCAL) | ||
940 | check_conflict(ls, lh, &nv.v); | ||
941 | luaY_checklimit(ls->fs, nvars, LUAI_MAXCCALLS - ls->L->nCcalls, | ||
942 | "variables in assignment"); | ||
943 | assignment(ls, &nv, nvars+1); | ||
944 | } | ||
945 | else { /* assignment -> `=' explist1 */ | ||
946 | int nexps; | ||
947 | checknext(ls, '='); | ||
948 | nexps = explist1(ls, &e); | ||
949 | if (nexps != nvars) { | ||
950 | adjust_assign(ls, nvars, nexps, &e); | ||
951 | if (nexps > nvars) | ||
952 | ls->fs->freereg -= nexps - nvars; /* remove extra values */ | ||
953 | } | ||
954 | else { | ||
955 | luaK_setoneret(ls->fs, &e); /* close last expression */ | ||
956 | luaK_storevar(ls->fs, &lh->v, &e); | ||
957 | return; /* avoid default */ | ||
958 | } | ||
959 | } | ||
960 | init_exp(&e, VNONRELOC, ls->fs->freereg-1); /* default assignment */ | ||
961 | luaK_storevar(ls->fs, &lh->v, &e); | ||
962 | } | ||
963 | |||
964 | |||
965 | static int cond (LexState *ls) { | ||
966 | /* cond -> exp */ | ||
967 | expdesc v; | ||
968 | expr(ls, &v); /* read condition */ | ||
969 | if (v.k == VNIL) v.k = VFALSE; /* `falses' are all equal here */ | ||
970 | luaK_goiftrue(ls->fs, &v); | ||
971 | return v.f; | ||
972 | } | ||
973 | |||
974 | |||
975 | static void breakstat (LexState *ls) { | ||
976 | FuncState *fs = ls->fs; | ||
977 | BlockCnt *bl = fs->bl; | ||
978 | int upval = 0; | ||
979 | while (bl && !bl->isbreakable) { | ||
980 | upval |= bl->upval; | ||
981 | bl = bl->previous; | ||
982 | } | ||
983 | if (!bl) | ||
984 | luaX_syntaxerror(ls, "no loop to break"); | ||
985 | if (upval) | ||
986 | luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0); | ||
987 | luaK_concat(fs, &bl->breaklist, luaK_jump(fs)); | ||
988 | } | ||
989 | |||
990 | |||
991 | static void whilestat (LexState *ls, int line) { | ||
992 | /* whilestat -> WHILE cond DO block END */ | ||
993 | FuncState *fs = ls->fs; | ||
994 | int whileinit; | ||
995 | int condexit; | ||
996 | BlockCnt bl; | ||
997 | luaX_next(ls); /* skip WHILE */ | ||
998 | whileinit = luaK_getlabel(fs); | ||
999 | condexit = cond(ls); | ||
1000 | enterblock(fs, &bl, 1); | ||
1001 | checknext(ls, TK_DO); | ||
1002 | block(ls); | ||
1003 | luaK_patchlist(fs, luaK_jump(fs), whileinit); | ||
1004 | check_match(ls, TK_END, TK_WHILE, line); | ||
1005 | leaveblock(fs); | ||
1006 | luaK_patchtohere(fs, condexit); /* false conditions finish the loop */ | ||
1007 | } | ||
1008 | |||
1009 | |||
1010 | static void repeatstat (LexState *ls, int line) { | ||
1011 | /* repeatstat -> REPEAT block UNTIL cond */ | ||
1012 | int condexit; | ||
1013 | FuncState *fs = ls->fs; | ||
1014 | int repeat_init = luaK_getlabel(fs); | ||
1015 | BlockCnt bl1, bl2; | ||
1016 | enterblock(fs, &bl1, 1); /* loop block */ | ||
1017 | enterblock(fs, &bl2, 0); /* scope block */ | ||
1018 | luaX_next(ls); /* skip REPEAT */ | ||
1019 | chunk(ls); | ||
1020 | check_match(ls, TK_UNTIL, TK_REPEAT, line); | ||
1021 | condexit = cond(ls); /* read condition (inside scope block) */ | ||
1022 | if (!bl2.upval) { /* no upvalues? */ | ||
1023 | leaveblock(fs); /* finish scope */ | ||
1024 | luaK_patchlist(ls->fs, condexit, repeat_init); /* close the loop */ | ||
1025 | } | ||
1026 | else { /* complete semantics when there are upvalues */ | ||
1027 | breakstat(ls); /* if condition then break */ | ||
1028 | luaK_patchtohere(ls->fs, condexit); /* else... */ | ||
1029 | leaveblock(fs); /* finish scope... */ | ||
1030 | luaK_patchlist(ls->fs, luaK_jump(fs), repeat_init); /* and repeat */ | ||
1031 | } | ||
1032 | leaveblock(fs); /* finish loop */ | ||
1033 | } | ||
1034 | |||
1035 | |||
1036 | static int exp1 (LexState *ls) { | ||
1037 | expdesc e; | ||
1038 | int k; | ||
1039 | expr(ls, &e); | ||
1040 | k = e.k; | ||
1041 | luaK_exp2nextreg(ls->fs, &e); | ||
1042 | return k; | ||
1043 | } | ||
1044 | |||
1045 | |||
1046 | static void forbody (LexState *ls, int base, int line, int nvars, int isnum) { | ||
1047 | /* forbody -> DO block */ | ||
1048 | BlockCnt bl; | ||
1049 | FuncState *fs = ls->fs; | ||
1050 | int prep, endfor; | ||
1051 | adjustlocalvars(ls, 3); /* control variables */ | ||
1052 | checknext(ls, TK_DO); | ||
1053 | prep = isnum ? luaK_codeAsBx(fs, OP_FORPREP, base, NO_JUMP) : luaK_jump(fs); | ||
1054 | enterblock(fs, &bl, 0); /* scope for declared variables */ | ||
1055 | adjustlocalvars(ls, nvars); | ||
1056 | luaK_reserveregs(fs, nvars); | ||
1057 | block(ls); | ||
1058 | leaveblock(fs); /* end of scope for declared variables */ | ||
1059 | luaK_patchtohere(fs, prep); | ||
1060 | endfor = (isnum) ? luaK_codeAsBx(fs, OP_FORLOOP, base, NO_JUMP) : | ||
1061 | luaK_codeABC(fs, OP_TFORLOOP, base, 0, nvars); | ||
1062 | luaK_fixline(fs, line); /* pretend that `OP_FOR' starts the loop */ | ||
1063 | luaK_patchlist(fs, (isnum ? endfor : luaK_jump(fs)), prep + 1); | ||
1064 | } | ||
1065 | |||
1066 | |||
1067 | static void fornum (LexState *ls, TString *varname, int line) { | ||
1068 | /* fornum -> NAME = exp1,exp1[,exp1] forbody */ | ||
1069 | FuncState *fs = ls->fs; | ||
1070 | int base = fs->freereg; | ||
1071 | new_localvarliteral(ls, "(for index)", 0); | ||
1072 | new_localvarliteral(ls, "(for limit)", 1); | ||
1073 | new_localvarliteral(ls, "(for step)", 2); | ||
1074 | new_localvar(ls, varname, 3); | ||
1075 | checknext(ls, '='); | ||
1076 | exp1(ls); /* initial value */ | ||
1077 | checknext(ls, ','); | ||
1078 | exp1(ls); /* limit */ | ||
1079 | if (testnext(ls, ',')) | ||
1080 | exp1(ls); /* optional step */ | ||
1081 | else { /* default step = 1 */ | ||
1082 | luaK_codeABx(fs, OP_LOADK, fs->freereg, luaK_numberK(fs, 1)); | ||
1083 | luaK_reserveregs(fs, 1); | ||
1084 | } | ||
1085 | forbody(ls, base, line, 1, 1); | ||
1086 | } | ||
1087 | |||
1088 | |||
1089 | static void forlist (LexState *ls, TString *indexname) { | ||
1090 | /* forlist -> NAME {,NAME} IN explist1 forbody */ | ||
1091 | FuncState *fs = ls->fs; | ||
1092 | expdesc e; | ||
1093 | int nvars = 0; | ||
1094 | int line; | ||
1095 | int base = fs->freereg; | ||
1096 | /* create control variables */ | ||
1097 | new_localvarliteral(ls, "(for generator)", nvars++); | ||
1098 | new_localvarliteral(ls, "(for state)", nvars++); | ||
1099 | new_localvarliteral(ls, "(for control)", nvars++); | ||
1100 | /* create declared variables */ | ||
1101 | new_localvar(ls, indexname, nvars++); | ||
1102 | while (testnext(ls, ',')) | ||
1103 | new_localvar(ls, str_checkname(ls), nvars++); | ||
1104 | checknext(ls, TK_IN); | ||
1105 | line = ls->linenumber; | ||
1106 | adjust_assign(ls, 3, explist1(ls, &e), &e); | ||
1107 | luaK_checkstack(fs, 3); /* extra space to call generator */ | ||
1108 | forbody(ls, base, line, nvars - 3, 0); | ||
1109 | } | ||
1110 | |||
1111 | |||
1112 | static void forstat (LexState *ls, int line) { | ||
1113 | /* forstat -> FOR (fornum | forlist) END */ | ||
1114 | FuncState *fs = ls->fs; | ||
1115 | TString *varname; | ||
1116 | BlockCnt bl; | ||
1117 | enterblock(fs, &bl, 1); /* scope for loop and control variables */ | ||
1118 | luaX_next(ls); /* skip `for' */ | ||
1119 | varname = str_checkname(ls); /* first variable name */ | ||
1120 | switch (ls->t.token) { | ||
1121 | case '=': fornum(ls, varname, line); break; | ||
1122 | case ',': case TK_IN: forlist(ls, varname); break; | ||
1123 | default: luaX_syntaxerror(ls, LUA_QL("=") " or " LUA_QL("in") " expected"); | ||
1124 | } | ||
1125 | check_match(ls, TK_END, TK_FOR, line); | ||
1126 | leaveblock(fs); /* loop scope (`break' jumps to this point) */ | ||
1127 | } | ||
1128 | |||
1129 | |||
1130 | static int test_then_block (LexState *ls) { | ||
1131 | /* test_then_block -> [IF | ELSEIF] cond THEN block */ | ||
1132 | int condexit; | ||
1133 | luaX_next(ls); /* skip IF or ELSEIF */ | ||
1134 | condexit = cond(ls); | ||
1135 | checknext(ls, TK_THEN); | ||
1136 | block(ls); /* `then' part */ | ||
1137 | return condexit; | ||
1138 | } | ||
1139 | |||
1140 | |||
1141 | static void ifstat (LexState *ls, int line) { | ||
1142 | /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */ | ||
1143 | FuncState *fs = ls->fs; | ||
1144 | int flist; | ||
1145 | int escapelist = NO_JUMP; | ||
1146 | flist = test_then_block(ls); /* IF cond THEN block */ | ||
1147 | while (ls->t.token == TK_ELSEIF) { | ||
1148 | luaK_concat(fs, &escapelist, luaK_jump(fs)); | ||
1149 | luaK_patchtohere(fs, flist); | ||
1150 | flist = test_then_block(ls); /* ELSEIF cond THEN block */ | ||
1151 | } | ||
1152 | if (ls->t.token == TK_ELSE) { | ||
1153 | luaK_concat(fs, &escapelist, luaK_jump(fs)); | ||
1154 | luaK_patchtohere(fs, flist); | ||
1155 | luaX_next(ls); /* skip ELSE (after patch, for correct line info) */ | ||
1156 | block(ls); /* `else' part */ | ||
1157 | } | ||
1158 | else | ||
1159 | luaK_concat(fs, &escapelist, flist); | ||
1160 | luaK_patchtohere(fs, escapelist); | ||
1161 | check_match(ls, TK_END, TK_IF, line); | ||
1162 | } | ||
1163 | |||
1164 | |||
1165 | static void localfunc (LexState *ls) { | ||
1166 | expdesc v, b; | ||
1167 | FuncState *fs = ls->fs; | ||
1168 | new_localvar(ls, str_checkname(ls), 0); | ||
1169 | init_exp(&v, VLOCAL, fs->freereg); | ||
1170 | luaK_reserveregs(fs, 1); | ||
1171 | adjustlocalvars(ls, 1); | ||
1172 | body(ls, &b, 0, ls->linenumber); | ||
1173 | luaK_storevar(fs, &v, &b); | ||
1174 | /* debug information will only see the variable after this point! */ | ||
1175 | getlocvar(fs, fs->nactvar - 1).startpc = fs->pc; | ||
1176 | } | ||
1177 | |||
1178 | |||
1179 | static void localstat (LexState *ls) { | ||
1180 | /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */ | ||
1181 | int nvars = 0; | ||
1182 | int nexps; | ||
1183 | expdesc e; | ||
1184 | do { | ||
1185 | new_localvar(ls, str_checkname(ls), nvars++); | ||
1186 | } while (testnext(ls, ',')); | ||
1187 | if (testnext(ls, '=')) | ||
1188 | nexps = explist1(ls, &e); | ||
1189 | else { | ||
1190 | e.k = VVOID; | ||
1191 | nexps = 0; | ||
1192 | } | ||
1193 | adjust_assign(ls, nvars, nexps, &e); | ||
1194 | adjustlocalvars(ls, nvars); | ||
1195 | } | ||
1196 | |||
1197 | |||
1198 | static int funcname (LexState *ls, expdesc *v) { | ||
1199 | /* funcname -> NAME {field} [`:' NAME] */ | ||
1200 | int needself = 0; | ||
1201 | singlevar(ls, v); | ||
1202 | while (ls->t.token == '.') | ||
1203 | field(ls, v); | ||
1204 | if (ls->t.token == ':') { | ||
1205 | needself = 1; | ||
1206 | field(ls, v); | ||
1207 | } | ||
1208 | return needself; | ||
1209 | } | ||
1210 | |||
1211 | |||
1212 | static void funcstat (LexState *ls, int line) { | ||
1213 | /* funcstat -> FUNCTION funcname body */ | ||
1214 | int needself; | ||
1215 | expdesc v, b; | ||
1216 | luaX_next(ls); /* skip FUNCTION */ | ||
1217 | needself = funcname(ls, &v); | ||
1218 | body(ls, &b, needself, line); | ||
1219 | luaK_storevar(ls->fs, &v, &b); | ||
1220 | luaK_fixline(ls->fs, line); /* definition `happens' in the first line */ | ||
1221 | } | ||
1222 | |||
1223 | |||
1224 | static void exprstat (LexState *ls) { | ||
1225 | /* stat -> func | assignment */ | ||
1226 | FuncState *fs = ls->fs; | ||
1227 | struct LHS_assign v; | ||
1228 | primaryexp(ls, &v.v); | ||
1229 | if (v.v.k == VCALL) /* stat -> func */ | ||
1230 | SETARG_C(getcode(fs, &v.v), 1); /* call statement uses no results */ | ||
1231 | else { /* stat -> assignment */ | ||
1232 | v.prev = NULL; | ||
1233 | assignment(ls, &v, 1); | ||
1234 | } | ||
1235 | } | ||
1236 | |||
1237 | |||
1238 | static void retstat (LexState *ls) { | ||
1239 | /* stat -> RETURN explist */ | ||
1240 | FuncState *fs = ls->fs; | ||
1241 | expdesc e; | ||
1242 | int first, nret; /* registers with returned values */ | ||
1243 | luaX_next(ls); /* skip RETURN */ | ||
1244 | if (block_follow(ls->t.token) || ls->t.token == ';') | ||
1245 | first = nret = 0; /* return no values */ | ||
1246 | else { | ||
1247 | nret = explist1(ls, &e); /* optional return values */ | ||
1248 | if (hasmultret(e.k)) { | ||
1249 | luaK_setmultret(fs, &e); | ||
1250 | if (e.k == VCALL && nret == 1) { /* tail call? */ | ||
1251 | SET_OPCODE(getcode(fs,&e), OP_TAILCALL); | ||
1252 | lua_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar); | ||
1253 | } | ||
1254 | first = fs->nactvar; | ||
1255 | nret = LUA_MULTRET; /* return all values */ | ||
1256 | } | ||
1257 | else { | ||
1258 | if (nret == 1) /* only one single value? */ | ||
1259 | first = luaK_exp2anyreg(fs, &e); | ||
1260 | else { | ||
1261 | luaK_exp2nextreg(fs, &e); /* values must go to the `stack' */ | ||
1262 | first = fs->nactvar; /* return all `active' values */ | ||
1263 | lua_assert(nret == fs->freereg - first); | ||
1264 | } | ||
1265 | } | ||
1266 | } | ||
1267 | luaK_ret(fs, first, nret); | ||
1268 | } | ||
1269 | |||
1270 | |||
1271 | static int statement (LexState *ls) { | ||
1272 | int line = ls->linenumber; /* may be needed for error messages */ | ||
1273 | switch (ls->t.token) { | ||
1274 | case TK_IF: { /* stat -> ifstat */ | ||
1275 | ifstat(ls, line); | ||
1276 | return 0; | ||
1277 | } | ||
1278 | case TK_WHILE: { /* stat -> whilestat */ | ||
1279 | whilestat(ls, line); | ||
1280 | return 0; | ||
1281 | } | ||
1282 | case TK_DO: { /* stat -> DO block END */ | ||
1283 | luaX_next(ls); /* skip DO */ | ||
1284 | block(ls); | ||
1285 | check_match(ls, TK_END, TK_DO, line); | ||
1286 | return 0; | ||
1287 | } | ||
1288 | case TK_FOR: { /* stat -> forstat */ | ||
1289 | forstat(ls, line); | ||
1290 | return 0; | ||
1291 | } | ||
1292 | case TK_REPEAT: { /* stat -> repeatstat */ | ||
1293 | repeatstat(ls, line); | ||
1294 | return 0; | ||
1295 | } | ||
1296 | case TK_FUNCTION: { | ||
1297 | funcstat(ls, line); /* stat -> funcstat */ | ||
1298 | return 0; | ||
1299 | } | ||
1300 | case TK_LOCAL: { /* stat -> localstat */ | ||
1301 | luaX_next(ls); /* skip LOCAL */ | ||
1302 | if (testnext(ls, TK_FUNCTION)) /* local function? */ | ||
1303 | localfunc(ls); | ||
1304 | else | ||
1305 | localstat(ls); | ||
1306 | return 0; | ||
1307 | } | ||
1308 | case TK_RETURN: { /* stat -> retstat */ | ||
1309 | retstat(ls); | ||
1310 | return 1; /* must be last statement */ | ||
1311 | } | ||
1312 | case TK_BREAK: { /* stat -> breakstat */ | ||
1313 | luaX_next(ls); /* skip BREAK */ | ||
1314 | breakstat(ls); | ||
1315 | return 1; /* must be last statement */ | ||
1316 | } | ||
1317 | default: { | ||
1318 | exprstat(ls); | ||
1319 | return 0; /* to avoid warnings */ | ||
1320 | } | ||
1321 | } | ||
1322 | } | ||
1323 | |||
1324 | |||
1325 | static void chunk (LexState *ls) { | ||
1326 | /* chunk -> { stat [`;'] } */ | ||
1327 | int islast = 0; | ||
1328 | enterlevel(ls); | ||
1329 | while (!islast && !block_follow(ls->t.token)) { | ||
1330 | islast = statement(ls); | ||
1331 | testnext(ls, ';'); | ||
1332 | lua_assert(ls->fs->f->maxstacksize >= ls->fs->freereg && | ||
1333 | ls->fs->freereg >= ls->fs->nactvar); | ||
1334 | ls->fs->freereg = ls->fs->nactvar; /* free registers */ | ||
1335 | } | ||
1336 | leavelevel(ls); | ||
1337 | } | ||
1338 | |||
1339 | /* }====================================================================== */ | ||
diff --git a/apps/plugins/lua/lparser.h b/apps/plugins/lua/lparser.h new file mode 100644 index 0000000000..f9b8e24913 --- /dev/null +++ b/apps/plugins/lua/lparser.h | |||
@@ -0,0 +1,82 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Lua Parser | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lparser_h | ||
8 | #define lparser_h | ||
9 | |||
10 | #include "llimits.h" | ||
11 | #include "lobject.h" | ||
12 | #include "lzio.h" | ||
13 | |||
14 | |||
15 | /* | ||
16 | ** Expression descriptor | ||
17 | */ | ||
18 | |||
19 | typedef enum { | ||
20 | VVOID, /* no value */ | ||
21 | VNIL, | ||
22 | VTRUE, | ||
23 | VFALSE, | ||
24 | VK, /* info = index of constant in `k' */ | ||
25 | VKNUM, /* nval = numerical value */ | ||
26 | VLOCAL, /* info = local register */ | ||
27 | VUPVAL, /* info = index of upvalue in `upvalues' */ | ||
28 | VGLOBAL, /* info = index of table; aux = index of global name in `k' */ | ||
29 | VINDEXED, /* info = table register; aux = index register (or `k') */ | ||
30 | VJMP, /* info = instruction pc */ | ||
31 | VRELOCABLE, /* info = instruction pc */ | ||
32 | VNONRELOC, /* info = result register */ | ||
33 | VCALL, /* info = instruction pc */ | ||
34 | VVARARG /* info = instruction pc */ | ||
35 | } expkind; | ||
36 | |||
37 | typedef struct expdesc { | ||
38 | expkind k; | ||
39 | union { | ||
40 | struct { int info, aux; } s; | ||
41 | lua_Number nval; | ||
42 | } u; | ||
43 | int t; /* patch list of `exit when true' */ | ||
44 | int f; /* patch list of `exit when false' */ | ||
45 | } expdesc; | ||
46 | |||
47 | |||
48 | typedef struct upvaldesc { | ||
49 | lu_byte k; | ||
50 | lu_byte info; | ||
51 | } upvaldesc; | ||
52 | |||
53 | |||
54 | struct BlockCnt; /* defined in lparser.c */ | ||
55 | |||
56 | |||
57 | /* state needed to generate code for a given function */ | ||
58 | typedef struct FuncState { | ||
59 | Proto *f; /* current function header */ | ||
60 | Table *h; /* table to find (and reuse) elements in `k' */ | ||
61 | struct FuncState *prev; /* enclosing function */ | ||
62 | struct LexState *ls; /* lexical state */ | ||
63 | struct lua_State *L; /* copy of the Lua state */ | ||
64 | struct BlockCnt *bl; /* chain of current blocks */ | ||
65 | int pc; /* next position to code (equivalent to `ncode') */ | ||
66 | int lasttarget; /* `pc' of last `jump target' */ | ||
67 | int jpc; /* list of pending jumps to `pc' */ | ||
68 | int freereg; /* first free register */ | ||
69 | int nk; /* number of elements in `k' */ | ||
70 | int np; /* number of elements in `p' */ | ||
71 | short nlocvars; /* number of elements in `locvars' */ | ||
72 | lu_byte nactvar; /* number of active local variables */ | ||
73 | upvaldesc upvalues[LUAI_MAXUPVALUES]; /* upvalues */ | ||
74 | unsigned short actvar[LUAI_MAXVARS]; /* declared-variable stack */ | ||
75 | } FuncState; | ||
76 | |||
77 | |||
78 | LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, | ||
79 | const char *name); | ||
80 | |||
81 | |||
82 | #endif | ||
diff --git a/apps/plugins/lua/lstate.c b/apps/plugins/lua/lstate.c new file mode 100644 index 0000000000..4313b83a0c --- /dev/null +++ b/apps/plugins/lua/lstate.c | |||
@@ -0,0 +1,214 @@ | |||
1 | /* | ||
2 | ** $Id: lstate.c,v 2.36.1.2 2008/01/03 15:20:39 roberto Exp $ | ||
3 | ** Global State | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stddef.h> | ||
9 | |||
10 | #define lstate_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "ldebug.h" | ||
16 | #include "ldo.h" | ||
17 | #include "lfunc.h" | ||
18 | #include "lgc.h" | ||
19 | #include "llex.h" | ||
20 | #include "lmem.h" | ||
21 | #include "lstate.h" | ||
22 | #include "lstring.h" | ||
23 | #include "ltable.h" | ||
24 | #include "ltm.h" | ||
25 | |||
26 | |||
27 | #define state_size(x) (sizeof(x) + LUAI_EXTRASPACE) | ||
28 | #define fromstate(l) (cast(lu_byte *, (l)) - LUAI_EXTRASPACE) | ||
29 | #define tostate(l) (cast(lua_State *, cast(lu_byte *, l) + LUAI_EXTRASPACE)) | ||
30 | |||
31 | |||
32 | /* | ||
33 | ** Main thread combines a thread state and the global state | ||
34 | */ | ||
35 | typedef struct LG { | ||
36 | lua_State l; | ||
37 | global_State g; | ||
38 | } LG; | ||
39 | |||
40 | |||
41 | |||
42 | static void stack_init (lua_State *L1, lua_State *L) { | ||
43 | /* initialize CallInfo array */ | ||
44 | L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo); | ||
45 | L1->ci = L1->base_ci; | ||
46 | L1->size_ci = BASIC_CI_SIZE; | ||
47 | L1->end_ci = L1->base_ci + L1->size_ci - 1; | ||
48 | /* initialize stack array */ | ||
49 | L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue); | ||
50 | L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK; | ||
51 | L1->top = L1->stack; | ||
52 | L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1; | ||
53 | /* initialize first ci */ | ||
54 | L1->ci->func = L1->top; | ||
55 | setnilvalue(L1->top++); /* `function' entry for this `ci' */ | ||
56 | L1->base = L1->ci->base = L1->top; | ||
57 | L1->ci->top = L1->top + LUA_MINSTACK; | ||
58 | } | ||
59 | |||
60 | |||
61 | static void freestack (lua_State *L, lua_State *L1) { | ||
62 | luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo); | ||
63 | luaM_freearray(L, L1->stack, L1->stacksize, TValue); | ||
64 | } | ||
65 | |||
66 | |||
67 | /* | ||
68 | ** open parts that may cause memory-allocation errors | ||
69 | */ | ||
70 | static void f_luaopen (lua_State *L, void *ud) { | ||
71 | global_State *g = G(L); | ||
72 | UNUSED(ud); | ||
73 | stack_init(L, L); /* init stack */ | ||
74 | sethvalue(L, gt(L), luaH_new(L, 0, 2)); /* table of globals */ | ||
75 | sethvalue(L, registry(L), luaH_new(L, 0, 2)); /* registry */ | ||
76 | luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */ | ||
77 | luaT_init(L); | ||
78 | luaX_init(L); | ||
79 | luaS_fix(luaS_newliteral(L, MEMERRMSG)); | ||
80 | g->GCthreshold = 4*g->totalbytes; | ||
81 | } | ||
82 | |||
83 | |||
84 | static void preinit_state (lua_State *L, global_State *g) { | ||
85 | G(L) = g; | ||
86 | L->stack = NULL; | ||
87 | L->stacksize = 0; | ||
88 | L->errorJmp = NULL; | ||
89 | L->hook = NULL; | ||
90 | L->hookmask = 0; | ||
91 | L->basehookcount = 0; | ||
92 | L->allowhook = 1; | ||
93 | resethookcount(L); | ||
94 | L->openupval = NULL; | ||
95 | L->size_ci = 0; | ||
96 | L->nCcalls = L->baseCcalls = 0; | ||
97 | L->status = 0; | ||
98 | L->base_ci = L->ci = NULL; | ||
99 | L->savedpc = NULL; | ||
100 | L->errfunc = 0; | ||
101 | setnilvalue(gt(L)); | ||
102 | } | ||
103 | |||
104 | |||
105 | static void close_state (lua_State *L) { | ||
106 | global_State *g = G(L); | ||
107 | luaF_close(L, L->stack); /* close all upvalues for this thread */ | ||
108 | luaC_freeall(L); /* collect all objects */ | ||
109 | lua_assert(g->rootgc == obj2gco(L)); | ||
110 | lua_assert(g->strt.nuse == 0); | ||
111 | luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *); | ||
112 | luaZ_freebuffer(L, &g->buff); | ||
113 | freestack(L, L); | ||
114 | lua_assert(g->totalbytes == sizeof(LG)); | ||
115 | (*g->frealloc)(g->ud, fromstate(L), state_size(LG), 0); | ||
116 | } | ||
117 | |||
118 | |||
119 | lua_State *luaE_newthread (lua_State *L) { | ||
120 | lua_State *L1 = tostate(luaM_malloc(L, state_size(lua_State))); | ||
121 | luaC_link(L, obj2gco(L1), LUA_TTHREAD); | ||
122 | preinit_state(L1, G(L)); | ||
123 | stack_init(L1, L); /* init stack */ | ||
124 | setobj2n(L, gt(L1), gt(L)); /* share table of globals */ | ||
125 | L1->hookmask = L->hookmask; | ||
126 | L1->basehookcount = L->basehookcount; | ||
127 | L1->hook = L->hook; | ||
128 | resethookcount(L1); | ||
129 | lua_assert(iswhite(obj2gco(L1))); | ||
130 | return L1; | ||
131 | } | ||
132 | |||
133 | |||
134 | void luaE_freethread (lua_State *L, lua_State *L1) { | ||
135 | luaF_close(L1, L1->stack); /* close all upvalues for this thread */ | ||
136 | lua_assert(L1->openupval == NULL); | ||
137 | luai_userstatefree(L1); | ||
138 | freestack(L, L1); | ||
139 | luaM_freemem(L, fromstate(L1), state_size(lua_State)); | ||
140 | } | ||
141 | |||
142 | |||
143 | LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) { | ||
144 | int i; | ||
145 | lua_State *L; | ||
146 | global_State *g; | ||
147 | void *l = (*f)(ud, NULL, 0, state_size(LG)); | ||
148 | if (l == NULL) return NULL; | ||
149 | L = tostate(l); | ||
150 | g = &((LG *)L)->g; | ||
151 | L->next = NULL; | ||
152 | L->tt = LUA_TTHREAD; | ||
153 | g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT); | ||
154 | L->marked = luaC_white(g); | ||
155 | set2bits(L->marked, FIXEDBIT, SFIXEDBIT); | ||
156 | preinit_state(L, g); | ||
157 | g->frealloc = f; | ||
158 | g->ud = ud; | ||
159 | g->mainthread = L; | ||
160 | g->uvhead.u.l.prev = &g->uvhead; | ||
161 | g->uvhead.u.l.next = &g->uvhead; | ||
162 | g->GCthreshold = 0; /* mark it as unfinished state */ | ||
163 | g->strt.size = 0; | ||
164 | g->strt.nuse = 0; | ||
165 | g->strt.hash = NULL; | ||
166 | setnilvalue(registry(L)); | ||
167 | luaZ_initbuffer(L, &g->buff); | ||
168 | g->panic = NULL; | ||
169 | g->gcstate = GCSpause; | ||
170 | g->rootgc = obj2gco(L); | ||
171 | g->sweepstrgc = 0; | ||
172 | g->sweepgc = &g->rootgc; | ||
173 | g->gray = NULL; | ||
174 | g->grayagain = NULL; | ||
175 | g->weak = NULL; | ||
176 | g->tmudata = NULL; | ||
177 | g->totalbytes = sizeof(LG); | ||
178 | g->gcpause = LUAI_GCPAUSE; | ||
179 | g->gcstepmul = LUAI_GCMUL; | ||
180 | g->gcdept = 0; | ||
181 | for (i=0; i<NUM_TAGS; i++) g->mt[i] = NULL; | ||
182 | if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) { | ||
183 | /* memory allocation error: free partial state */ | ||
184 | close_state(L); | ||
185 | L = NULL; | ||
186 | } | ||
187 | else | ||
188 | luai_userstateopen(L); | ||
189 | return L; | ||
190 | } | ||
191 | |||
192 | |||
193 | static void callallgcTM (lua_State *L, void *ud) { | ||
194 | UNUSED(ud); | ||
195 | luaC_callGCTM(L); /* call GC metamethods for all udata */ | ||
196 | } | ||
197 | |||
198 | |||
199 | LUA_API void lua_close (lua_State *L) { | ||
200 | L = G(L)->mainthread; /* only the main thread can be closed */ | ||
201 | lua_lock(L); | ||
202 | luaF_close(L, L->stack); /* close all upvalues for this thread */ | ||
203 | luaC_separateudata(L, 1); /* separate udata that have GC metamethods */ | ||
204 | L->errfunc = 0; /* no error function during GC metamethods */ | ||
205 | do { /* repeat until no more errors */ | ||
206 | L->ci = L->base_ci; | ||
207 | L->base = L->top = L->ci->base; | ||
208 | L->nCcalls = L->baseCcalls = 0; | ||
209 | } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0); | ||
210 | lua_assert(G(L)->tmudata == NULL); | ||
211 | luai_userstateclose(L); | ||
212 | close_state(L); | ||
213 | } | ||
214 | |||
diff --git a/apps/plugins/lua/lstate.h b/apps/plugins/lua/lstate.h new file mode 100644 index 0000000000..94a6249461 --- /dev/null +++ b/apps/plugins/lua/lstate.h | |||
@@ -0,0 +1,169 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Global State | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lstate_h | ||
8 | #define lstate_h | ||
9 | |||
10 | #include "lua.h" | ||
11 | |||
12 | #include "lobject.h" | ||
13 | #include "ltm.h" | ||
14 | #include "lzio.h" | ||
15 | |||
16 | |||
17 | |||
18 | struct lua_longjmp; /* defined in ldo.c */ | ||
19 | |||
20 | |||
21 | /* table of globals */ | ||
22 | #define gt(L) (&L->l_gt) | ||
23 | |||
24 | /* registry */ | ||
25 | #define registry(L) (&G(L)->l_registry) | ||
26 | |||
27 | |||
28 | /* extra stack space to handle TM calls and some other extras */ | ||
29 | #define EXTRA_STACK 5 | ||
30 | |||
31 | |||
32 | #define BASIC_CI_SIZE 8 | ||
33 | |||
34 | #define BASIC_STACK_SIZE (2*LUA_MINSTACK) | ||
35 | |||
36 | |||
37 | |||
38 | typedef struct stringtable { | ||
39 | GCObject **hash; | ||
40 | lu_int32 nuse; /* number of elements */ | ||
41 | int size; | ||
42 | } stringtable; | ||
43 | |||
44 | |||
45 | /* | ||
46 | ** informations about a call | ||
47 | */ | ||
48 | typedef struct CallInfo { | ||
49 | StkId base; /* base for this function */ | ||
50 | StkId func; /* function index in the stack */ | ||
51 | StkId top; /* top for this function */ | ||
52 | const Instruction *savedpc; | ||
53 | int nresults; /* expected number of results from this function */ | ||
54 | int tailcalls; /* number of tail calls lost under this entry */ | ||
55 | } CallInfo; | ||
56 | |||
57 | |||
58 | |||
59 | #define curr_func(L) (clvalue(L->ci->func)) | ||
60 | #define ci_func(ci) (clvalue((ci)->func)) | ||
61 | #define f_isLua(ci) (!ci_func(ci)->c.isC) | ||
62 | #define isLua(ci) (ttisfunction((ci)->func) && f_isLua(ci)) | ||
63 | |||
64 | |||
65 | /* | ||
66 | ** `global state', shared by all threads of this state | ||
67 | */ | ||
68 | typedef struct global_State { | ||
69 | stringtable strt; /* hash table for strings */ | ||
70 | lua_Alloc frealloc; /* function to reallocate memory */ | ||
71 | void *ud; /* auxiliary data to `frealloc' */ | ||
72 | lu_byte currentwhite; | ||
73 | lu_byte gcstate; /* state of garbage collector */ | ||
74 | int sweepstrgc; /* position of sweep in `strt' */ | ||
75 | GCObject *rootgc; /* list of all collectable objects */ | ||
76 | GCObject **sweepgc; /* position of sweep in `rootgc' */ | ||
77 | GCObject *gray; /* list of gray objects */ | ||
78 | GCObject *grayagain; /* list of objects to be traversed atomically */ | ||
79 | GCObject *weak; /* list of weak tables (to be cleared) */ | ||
80 | GCObject *tmudata; /* last element of list of userdata to be GC */ | ||
81 | Mbuffer buff; /* temporary buffer for string concatentation */ | ||
82 | lu_mem GCthreshold; | ||
83 | lu_mem totalbytes; /* number of bytes currently allocated */ | ||
84 | lu_mem estimate; /* an estimate of number of bytes actually in use */ | ||
85 | lu_mem gcdept; /* how much GC is `behind schedule' */ | ||
86 | int gcpause; /* size of pause between successive GCs */ | ||
87 | int gcstepmul; /* GC `granularity' */ | ||
88 | lua_CFunction panic; /* to be called in unprotected errors */ | ||
89 | TValue l_registry; | ||
90 | struct lua_State *mainthread; | ||
91 | UpVal uvhead; /* head of double-linked list of all open upvalues */ | ||
92 | struct Table *mt[NUM_TAGS]; /* metatables for basic types */ | ||
93 | TString *tmname[TM_N]; /* array with tag-method names */ | ||
94 | } global_State; | ||
95 | |||
96 | |||
97 | /* | ||
98 | ** `per thread' state | ||
99 | */ | ||
100 | struct lua_State { | ||
101 | CommonHeader; | ||
102 | lu_byte status; | ||
103 | StkId top; /* first free slot in the stack */ | ||
104 | StkId base; /* base of current function */ | ||
105 | global_State *l_G; | ||
106 | CallInfo *ci; /* call info for current function */ | ||
107 | const Instruction *savedpc; /* `savedpc' of current function */ | ||
108 | StkId stack_last; /* last free slot in the stack */ | ||
109 | StkId stack; /* stack base */ | ||
110 | CallInfo *end_ci; /* points after end of ci array*/ | ||
111 | CallInfo *base_ci; /* array of CallInfo's */ | ||
112 | int stacksize; | ||
113 | int size_ci; /* size of array `base_ci' */ | ||
114 | unsigned short nCcalls; /* number of nested C calls */ | ||
115 | unsigned short baseCcalls; /* nested C calls when resuming coroutine */ | ||
116 | lu_byte hookmask; | ||
117 | lu_byte allowhook; | ||
118 | int basehookcount; | ||
119 | int hookcount; | ||
120 | lua_Hook hook; | ||
121 | TValue l_gt; /* table of globals */ | ||
122 | TValue env; /* temporary place for environments */ | ||
123 | GCObject *openupval; /* list of open upvalues in this stack */ | ||
124 | GCObject *gclist; | ||
125 | struct lua_longjmp *errorJmp; /* current error recover point */ | ||
126 | ptrdiff_t errfunc; /* current error handling function (stack index) */ | ||
127 | }; | ||
128 | |||
129 | |||
130 | #define G(L) (L->l_G) | ||
131 | |||
132 | |||
133 | /* | ||
134 | ** Union of all collectable objects | ||
135 | */ | ||
136 | union GCObject { | ||
137 | GCheader gch; | ||
138 | union TString ts; | ||
139 | union Udata u; | ||
140 | union Closure cl; | ||
141 | struct Table h; | ||
142 | struct Proto p; | ||
143 | struct UpVal uv; | ||
144 | struct lua_State th; /* thread */ | ||
145 | }; | ||
146 | |||
147 | |||
148 | /* macros to convert a GCObject into a specific value */ | ||
149 | #define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts)) | ||
150 | #define gco2ts(o) (&rawgco2ts(o)->tsv) | ||
151 | #define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u)) | ||
152 | #define gco2u(o) (&rawgco2u(o)->uv) | ||
153 | #define gco2cl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl)) | ||
154 | #define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h)) | ||
155 | #define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p)) | ||
156 | #define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv)) | ||
157 | #define ngcotouv(o) \ | ||
158 | check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv)) | ||
159 | #define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th)) | ||
160 | |||
161 | /* macro to convert any Lua object into a GCObject */ | ||
162 | #define obj2gco(v) (cast(GCObject *, (v))) | ||
163 | |||
164 | |||
165 | LUAI_FUNC lua_State *luaE_newthread (lua_State *L); | ||
166 | LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1); | ||
167 | |||
168 | #endif | ||
169 | |||
diff --git a/apps/plugins/lua/lstring.c b/apps/plugins/lua/lstring.c new file mode 100644 index 0000000000..49113151cc --- /dev/null +++ b/apps/plugins/lua/lstring.c | |||
@@ -0,0 +1,111 @@ | |||
1 | /* | ||
2 | ** $Id: lstring.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** String table (keeps all strings handled by Lua) | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <string.h> | ||
9 | |||
10 | #define lstring_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "lmem.h" | ||
16 | #include "lobject.h" | ||
17 | #include "lstate.h" | ||
18 | #include "lstring.h" | ||
19 | |||
20 | |||
21 | |||
22 | void luaS_resize (lua_State *L, int newsize) { | ||
23 | GCObject **newhash; | ||
24 | stringtable *tb; | ||
25 | int i; | ||
26 | if (G(L)->gcstate == GCSsweepstring) | ||
27 | return; /* cannot resize during GC traverse */ | ||
28 | newhash = luaM_newvector(L, newsize, GCObject *); | ||
29 | tb = &G(L)->strt; | ||
30 | for (i=0; i<newsize; i++) newhash[i] = NULL; | ||
31 | /* rehash */ | ||
32 | for (i=0; i<tb->size; i++) { | ||
33 | GCObject *p = tb->hash[i]; | ||
34 | while (p) { /* for each node in the list */ | ||
35 | GCObject *next = p->gch.next; /* save next */ | ||
36 | unsigned int h = gco2ts(p)->hash; | ||
37 | int h1 = lmod(h, newsize); /* new position */ | ||
38 | lua_assert(cast_int(h%newsize) == lmod(h, newsize)); | ||
39 | p->gch.next = newhash[h1]; /* chain it */ | ||
40 | newhash[h1] = p; | ||
41 | p = next; | ||
42 | } | ||
43 | } | ||
44 | luaM_freearray(L, tb->hash, tb->size, TString *); | ||
45 | tb->size = newsize; | ||
46 | tb->hash = newhash; | ||
47 | } | ||
48 | |||
49 | |||
50 | static TString *newlstr (lua_State *L, const char *str, size_t l, | ||
51 | unsigned int h) { | ||
52 | TString *ts; | ||
53 | stringtable *tb; | ||
54 | if (l+1 > (MAX_SIZET - sizeof(TString))/sizeof(char)) | ||
55 | luaM_toobig(L); | ||
56 | ts = cast(TString *, luaM_malloc(L, (l+1)*sizeof(char)+sizeof(TString))); | ||
57 | ts->tsv.len = l; | ||
58 | ts->tsv.hash = h; | ||
59 | ts->tsv.marked = luaC_white(G(L)); | ||
60 | ts->tsv.tt = LUA_TSTRING; | ||
61 | ts->tsv.reserved = 0; | ||
62 | memcpy(ts+1, str, l*sizeof(char)); | ||
63 | ((char *)(ts+1))[l] = '\0'; /* ending 0 */ | ||
64 | tb = &G(L)->strt; | ||
65 | h = lmod(h, tb->size); | ||
66 | ts->tsv.next = tb->hash[h]; /* chain new entry */ | ||
67 | tb->hash[h] = obj2gco(ts); | ||
68 | tb->nuse++; | ||
69 | if (tb->nuse > cast(lu_int32, tb->size) && tb->size <= MAX_INT/2) | ||
70 | luaS_resize(L, tb->size*2); /* too crowded */ | ||
71 | return ts; | ||
72 | } | ||
73 | |||
74 | |||
75 | TString *luaS_newlstr (lua_State *L, const char *str, size_t l) { | ||
76 | GCObject *o; | ||
77 | unsigned int h = cast(unsigned int, l); /* seed */ | ||
78 | size_t step = (l>>5)+1; /* if string is too long, don't hash all its chars */ | ||
79 | size_t l1; | ||
80 | for (l1=l; l1>=step; l1-=step) /* compute hash */ | ||
81 | h = h ^ ((h<<5)+(h>>2)+cast(unsigned char, str[l1-1])); | ||
82 | for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)]; | ||
83 | o != NULL; | ||
84 | o = o->gch.next) { | ||
85 | TString *ts = rawgco2ts(o); | ||
86 | if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0)) { | ||
87 | /* string may be dead */ | ||
88 | if (isdead(G(L), o)) changewhite(o); | ||
89 | return ts; | ||
90 | } | ||
91 | } | ||
92 | return newlstr(L, str, l, h); /* not found */ | ||
93 | } | ||
94 | |||
95 | |||
96 | Udata *luaS_newudata (lua_State *L, size_t s, Table *e) { | ||
97 | Udata *u; | ||
98 | if (s > MAX_SIZET - sizeof(Udata)) | ||
99 | luaM_toobig(L); | ||
100 | u = cast(Udata *, luaM_malloc(L, s + sizeof(Udata))); | ||
101 | u->uv.marked = luaC_white(G(L)); /* is not finalized */ | ||
102 | u->uv.tt = LUA_TUSERDATA; | ||
103 | u->uv.len = s; | ||
104 | u->uv.metatable = NULL; | ||
105 | u->uv.env = e; | ||
106 | /* chain it on udata list (after main thread) */ | ||
107 | u->uv.next = G(L)->mainthread->next; | ||
108 | G(L)->mainthread->next = obj2gco(u); | ||
109 | return u; | ||
110 | } | ||
111 | |||
diff --git a/apps/plugins/lua/lstring.h b/apps/plugins/lua/lstring.h new file mode 100644 index 0000000000..c88e4c12a9 --- /dev/null +++ b/apps/plugins/lua/lstring.h | |||
@@ -0,0 +1,31 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** String table (keep all strings handled by Lua) | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lstring_h | ||
8 | #define lstring_h | ||
9 | |||
10 | |||
11 | #include "lgc.h" | ||
12 | #include "lobject.h" | ||
13 | #include "lstate.h" | ||
14 | |||
15 | |||
16 | #define sizestring(s) (sizeof(union TString)+((s)->len+1)*sizeof(char)) | ||
17 | |||
18 | #define sizeudata(u) (sizeof(union Udata)+(u)->len) | ||
19 | |||
20 | #define luaS_new(L, s) (luaS_newlstr(L, s, strlen(s))) | ||
21 | #define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \ | ||
22 | (sizeof(s)/sizeof(char))-1)) | ||
23 | |||
24 | #define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT) | ||
25 | |||
26 | LUAI_FUNC void luaS_resize (lua_State *L, int newsize); | ||
27 | LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e); | ||
28 | LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l); | ||
29 | |||
30 | |||
31 | #endif | ||
diff --git a/apps/plugins/lua/lstrlib.c b/apps/plugins/lua/lstrlib.c new file mode 100644 index 0000000000..3d6103692f --- /dev/null +++ b/apps/plugins/lua/lstrlib.c | |||
@@ -0,0 +1,869 @@ | |||
1 | /* | ||
2 | ** $Id: lstrlib.c,v 1.132.1.4 2008/07/11 17:27:21 roberto Exp $ | ||
3 | ** Standard library for string operations and pattern-matching | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <ctype.h> | ||
9 | #include <stddef.h> | ||
10 | #include <stdio.h> | ||
11 | #include <stdlib.h> | ||
12 | #include <string.h> | ||
13 | |||
14 | #define lstrlib_c | ||
15 | #define LUA_LIB | ||
16 | |||
17 | #include "lua.h" | ||
18 | |||
19 | #include "lauxlib.h" | ||
20 | #include "lualib.h" | ||
21 | |||
22 | |||
23 | /* macro to `unsign' a character */ | ||
24 | #define uchar(c) ((unsigned char)(c)) | ||
25 | |||
26 | |||
27 | |||
28 | static int str_len (lua_State *L) { | ||
29 | size_t l; | ||
30 | luaL_checklstring(L, 1, &l); | ||
31 | lua_pushinteger(L, l); | ||
32 | return 1; | ||
33 | } | ||
34 | |||
35 | |||
36 | static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) { | ||
37 | /* relative string position: negative means back from end */ | ||
38 | if (pos < 0) pos += (ptrdiff_t)len + 1; | ||
39 | return (pos >= 0) ? pos : 0; | ||
40 | } | ||
41 | |||
42 | |||
43 | static int str_sub (lua_State *L) { | ||
44 | size_t l; | ||
45 | const char *s = luaL_checklstring(L, 1, &l); | ||
46 | ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l); | ||
47 | ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l); | ||
48 | if (start < 1) start = 1; | ||
49 | if (end > (ptrdiff_t)l) end = (ptrdiff_t)l; | ||
50 | if (start <= end) | ||
51 | lua_pushlstring(L, s+start-1, end-start+1); | ||
52 | else lua_pushliteral(L, ""); | ||
53 | return 1; | ||
54 | } | ||
55 | |||
56 | |||
57 | static int str_reverse (lua_State *L) { | ||
58 | size_t l; | ||
59 | luaL_Buffer b; | ||
60 | const char *s = luaL_checklstring(L, 1, &l); | ||
61 | luaL_buffinit(L, &b); | ||
62 | while (l--) luaL_addchar(&b, s[l]); | ||
63 | luaL_pushresult(&b); | ||
64 | return 1; | ||
65 | } | ||
66 | |||
67 | |||
68 | static int str_lower (lua_State *L) { | ||
69 | size_t l; | ||
70 | size_t i; | ||
71 | luaL_Buffer b; | ||
72 | const char *s = luaL_checklstring(L, 1, &l); | ||
73 | luaL_buffinit(L, &b); | ||
74 | for (i=0; i<l; i++) | ||
75 | luaL_addchar(&b, tolower(uchar(s[i]))); | ||
76 | luaL_pushresult(&b); | ||
77 | return 1; | ||
78 | } | ||
79 | |||
80 | |||
81 | static int str_upper (lua_State *L) { | ||
82 | size_t l; | ||
83 | size_t i; | ||
84 | luaL_Buffer b; | ||
85 | const char *s = luaL_checklstring(L, 1, &l); | ||
86 | luaL_buffinit(L, &b); | ||
87 | for (i=0; i<l; i++) | ||
88 | luaL_addchar(&b, toupper(uchar(s[i]))); | ||
89 | luaL_pushresult(&b); | ||
90 | return 1; | ||
91 | } | ||
92 | |||
93 | static int str_rep (lua_State *L) { | ||
94 | size_t l; | ||
95 | luaL_Buffer b; | ||
96 | const char *s = luaL_checklstring(L, 1, &l); | ||
97 | int n = luaL_checkint(L, 2); | ||
98 | luaL_buffinit(L, &b); | ||
99 | while (n-- > 0) | ||
100 | luaL_addlstring(&b, s, l); | ||
101 | luaL_pushresult(&b); | ||
102 | return 1; | ||
103 | } | ||
104 | |||
105 | |||
106 | static int str_byte (lua_State *L) { | ||
107 | size_t l; | ||
108 | const char *s = luaL_checklstring(L, 1, &l); | ||
109 | ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l); | ||
110 | ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l); | ||
111 | int n, i; | ||
112 | if (posi <= 0) posi = 1; | ||
113 | if ((size_t)pose > l) pose = l; | ||
114 | if (posi > pose) return 0; /* empty interval; return no values */ | ||
115 | n = (int)(pose - posi + 1); | ||
116 | if (posi + n <= pose) /* overflow? */ | ||
117 | luaL_error(L, "string slice too long"); | ||
118 | luaL_checkstack(L, n, "string slice too long"); | ||
119 | for (i=0; i<n; i++) | ||
120 | lua_pushinteger(L, uchar(s[posi+i-1])); | ||
121 | return n; | ||
122 | } | ||
123 | |||
124 | |||
125 | static int str_char (lua_State *L) { | ||
126 | int n = lua_gettop(L); /* number of arguments */ | ||
127 | int i; | ||
128 | luaL_Buffer b; | ||
129 | luaL_buffinit(L, &b); | ||
130 | for (i=1; i<=n; i++) { | ||
131 | int c = luaL_checkint(L, i); | ||
132 | luaL_argcheck(L, uchar(c) == c, i, "invalid value"); | ||
133 | luaL_addchar(&b, uchar(c)); | ||
134 | } | ||
135 | luaL_pushresult(&b); | ||
136 | return 1; | ||
137 | } | ||
138 | |||
139 | |||
140 | static int writer (lua_State *L, const void* b, size_t size, void* B) { | ||
141 | (void)L; | ||
142 | luaL_addlstring((luaL_Buffer*) B, (const char *)b, size); | ||
143 | return 0; | ||
144 | } | ||
145 | |||
146 | |||
147 | static int str_dump (lua_State *L) { | ||
148 | luaL_Buffer b; | ||
149 | luaL_checktype(L, 1, LUA_TFUNCTION); | ||
150 | lua_settop(L, 1); | ||
151 | luaL_buffinit(L,&b); | ||
152 | if (lua_dump(L, writer, &b) != 0) | ||
153 | luaL_error(L, "unable to dump given function"); | ||
154 | luaL_pushresult(&b); | ||
155 | return 1; | ||
156 | } | ||
157 | |||
158 | |||
159 | |||
160 | /* | ||
161 | ** {====================================================== | ||
162 | ** PATTERN MATCHING | ||
163 | ** ======================================================= | ||
164 | */ | ||
165 | |||
166 | |||
167 | #define CAP_UNFINISHED (-1) | ||
168 | #define CAP_POSITION (-2) | ||
169 | |||
170 | typedef struct MatchState { | ||
171 | const char *src_init; /* init of source string */ | ||
172 | const char *src_end; /* end (`\0') of source string */ | ||
173 | lua_State *L; | ||
174 | int level; /* total number of captures (finished or unfinished) */ | ||
175 | struct { | ||
176 | const char *init; | ||
177 | ptrdiff_t len; | ||
178 | } capture[LUA_MAXCAPTURES]; | ||
179 | } MatchState; | ||
180 | |||
181 | |||
182 | #define L_ESC '%' | ||
183 | #define SPECIALS "^$*+?.([%-" | ||
184 | |||
185 | |||
186 | static int check_capture (MatchState *ms, int l) { | ||
187 | l -= '1'; | ||
188 | if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED) | ||
189 | return luaL_error(ms->L, "invalid capture index"); | ||
190 | return l; | ||
191 | } | ||
192 | |||
193 | |||
194 | static int capture_to_close (MatchState *ms) { | ||
195 | int level = ms->level; | ||
196 | for (level--; level>=0; level--) | ||
197 | if (ms->capture[level].len == CAP_UNFINISHED) return level; | ||
198 | return luaL_error(ms->L, "invalid pattern capture"); | ||
199 | } | ||
200 | |||
201 | |||
202 | static const char *classend (MatchState *ms, const char *p) { | ||
203 | switch (*p++) { | ||
204 | case L_ESC: { | ||
205 | if (*p == '\0') | ||
206 | luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")"); | ||
207 | return p+1; | ||
208 | } | ||
209 | case '[': { | ||
210 | if (*p == '^') p++; | ||
211 | do { /* look for a `]' */ | ||
212 | if (*p == '\0') | ||
213 | luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")"); | ||
214 | if (*(p++) == L_ESC && *p != '\0') | ||
215 | p++; /* skip escapes (e.g. `%]') */ | ||
216 | } while (*p != ']'); | ||
217 | return p+1; | ||
218 | } | ||
219 | default: { | ||
220 | return p; | ||
221 | } | ||
222 | } | ||
223 | } | ||
224 | |||
225 | |||
226 | static int match_class (int c, int cl) { | ||
227 | int res; | ||
228 | switch (tolower(cl)) { | ||
229 | case 'a' : res = isalpha(c); break; | ||
230 | case 'c' : res = iscntrl(c); break; | ||
231 | case 'd' : res = isdigit(c); break; | ||
232 | case 'l' : res = islower(c); break; | ||
233 | case 'p' : res = ispunct(c); break; | ||
234 | case 's' : res = isspace(c); break; | ||
235 | case 'u' : res = isupper(c); break; | ||
236 | case 'w' : res = isalnum(c); break; | ||
237 | case 'x' : res = isxdigit(c); break; | ||
238 | case 'z' : res = (c == 0); break; | ||
239 | default: return (cl == c); | ||
240 | } | ||
241 | return (islower(cl) ? res : !res); | ||
242 | } | ||
243 | |||
244 | |||
245 | static int matchbracketclass (int c, const char *p, const char *ec) { | ||
246 | int sig = 1; | ||
247 | if (*(p+1) == '^') { | ||
248 | sig = 0; | ||
249 | p++; /* skip the `^' */ | ||
250 | } | ||
251 | while (++p < ec) { | ||
252 | if (*p == L_ESC) { | ||
253 | p++; | ||
254 | if (match_class(c, uchar(*p))) | ||
255 | return sig; | ||
256 | } | ||
257 | else if ((*(p+1) == '-') && (p+2 < ec)) { | ||
258 | p+=2; | ||
259 | if (uchar(*(p-2)) <= c && c <= uchar(*p)) | ||
260 | return sig; | ||
261 | } | ||
262 | else if (uchar(*p) == c) return sig; | ||
263 | } | ||
264 | return !sig; | ||
265 | } | ||
266 | |||
267 | |||
268 | static int singlematch (int c, const char *p, const char *ep) { | ||
269 | switch (*p) { | ||
270 | case '.': return 1; /* matches any char */ | ||
271 | case L_ESC: return match_class(c, uchar(*(p+1))); | ||
272 | case '[': return matchbracketclass(c, p, ep-1); | ||
273 | default: return (uchar(*p) == c); | ||
274 | } | ||
275 | } | ||
276 | |||
277 | |||
278 | static const char *match (MatchState *ms, const char *s, const char *p); | ||
279 | |||
280 | |||
281 | static const char *matchbalance (MatchState *ms, const char *s, | ||
282 | const char *p) { | ||
283 | if (*p == 0 || *(p+1) == 0) | ||
284 | luaL_error(ms->L, "unbalanced pattern"); | ||
285 | if (*s != *p) return NULL; | ||
286 | else { | ||
287 | int b = *p; | ||
288 | int e = *(p+1); | ||
289 | int cont = 1; | ||
290 | while (++s < ms->src_end) { | ||
291 | if (*s == e) { | ||
292 | if (--cont == 0) return s+1; | ||
293 | } | ||
294 | else if (*s == b) cont++; | ||
295 | } | ||
296 | } | ||
297 | return NULL; /* string ends out of balance */ | ||
298 | } | ||
299 | |||
300 | |||
301 | static const char *max_expand (MatchState *ms, const char *s, | ||
302 | const char *p, const char *ep) { | ||
303 | ptrdiff_t i = 0; /* counts maximum expand for item */ | ||
304 | while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep)) | ||
305 | i++; | ||
306 | /* keeps trying to match with the maximum repetitions */ | ||
307 | while (i>=0) { | ||
308 | const char *res = match(ms, (s+i), ep+1); | ||
309 | if (res) return res; | ||
310 | i--; /* else didn't match; reduce 1 repetition to try again */ | ||
311 | } | ||
312 | return NULL; | ||
313 | } | ||
314 | |||
315 | |||
316 | static const char *min_expand (MatchState *ms, const char *s, | ||
317 | const char *p, const char *ep) { | ||
318 | for (;;) { | ||
319 | const char *res = match(ms, s, ep+1); | ||
320 | if (res != NULL) | ||
321 | return res; | ||
322 | else if (s<ms->src_end && singlematch(uchar(*s), p, ep)) | ||
323 | s++; /* try with one more repetition */ | ||
324 | else return NULL; | ||
325 | } | ||
326 | } | ||
327 | |||
328 | |||
329 | static const char *start_capture (MatchState *ms, const char *s, | ||
330 | const char *p, int what) { | ||
331 | const char *res; | ||
332 | int level = ms->level; | ||
333 | if (level >= LUA_MAXCAPTURES) luaL_error(ms->L, "too many captures"); | ||
334 | ms->capture[level].init = s; | ||
335 | ms->capture[level].len = what; | ||
336 | ms->level = level+1; | ||
337 | if ((res=match(ms, s, p)) == NULL) /* match failed? */ | ||
338 | ms->level--; /* undo capture */ | ||
339 | return res; | ||
340 | } | ||
341 | |||
342 | |||
343 | static const char *end_capture (MatchState *ms, const char *s, | ||
344 | const char *p) { | ||
345 | int l = capture_to_close(ms); | ||
346 | const char *res; | ||
347 | ms->capture[l].len = s - ms->capture[l].init; /* close capture */ | ||
348 | if ((res = match(ms, s, p)) == NULL) /* match failed? */ | ||
349 | ms->capture[l].len = CAP_UNFINISHED; /* undo capture */ | ||
350 | return res; | ||
351 | } | ||
352 | |||
353 | |||
354 | static const char *match_capture (MatchState *ms, const char *s, int l) { | ||
355 | size_t len; | ||
356 | l = check_capture(ms, l); | ||
357 | len = ms->capture[l].len; | ||
358 | if ((size_t)(ms->src_end-s) >= len && | ||
359 | memcmp(ms->capture[l].init, s, len) == 0) | ||
360 | return s+len; | ||
361 | else return NULL; | ||
362 | } | ||
363 | |||
364 | |||
365 | static const char *match (MatchState *ms, const char *s, const char *p) { | ||
366 | init: /* using goto's to optimize tail recursion */ | ||
367 | switch (*p) { | ||
368 | case '(': { /* start capture */ | ||
369 | if (*(p+1) == ')') /* position capture? */ | ||
370 | return start_capture(ms, s, p+2, CAP_POSITION); | ||
371 | else | ||
372 | return start_capture(ms, s, p+1, CAP_UNFINISHED); | ||
373 | } | ||
374 | case ')': { /* end capture */ | ||
375 | return end_capture(ms, s, p+1); | ||
376 | } | ||
377 | case L_ESC: { | ||
378 | switch (*(p+1)) { | ||
379 | case 'b': { /* balanced string? */ | ||
380 | s = matchbalance(ms, s, p+2); | ||
381 | if (s == NULL) return NULL; | ||
382 | p+=4; goto init; /* else return match(ms, s, p+4); */ | ||
383 | } | ||
384 | case 'f': { /* frontier? */ | ||
385 | const char *ep; char previous; | ||
386 | p += 2; | ||
387 | if (*p != '[') | ||
388 | luaL_error(ms->L, "missing " LUA_QL("[") " after " | ||
389 | LUA_QL("%%f") " in pattern"); | ||
390 | ep = classend(ms, p); /* points to what is next */ | ||
391 | previous = (s == ms->src_init) ? '\0' : *(s-1); | ||
392 | if (matchbracketclass(uchar(previous), p, ep-1) || | ||
393 | !matchbracketclass(uchar(*s), p, ep-1)) return NULL; | ||
394 | p=ep; goto init; /* else return match(ms, s, ep); */ | ||
395 | } | ||
396 | default: { | ||
397 | if (isdigit(uchar(*(p+1)))) { /* capture results (%0-%9)? */ | ||
398 | s = match_capture(ms, s, uchar(*(p+1))); | ||
399 | if (s == NULL) return NULL; | ||
400 | p+=2; goto init; /* else return match(ms, s, p+2) */ | ||
401 | } | ||
402 | goto dflt; /* case default */ | ||
403 | } | ||
404 | } | ||
405 | } | ||
406 | case '\0': { /* end of pattern */ | ||
407 | return s; /* match succeeded */ | ||
408 | } | ||
409 | case '$': { | ||
410 | if (*(p+1) == '\0') /* is the `$' the last char in pattern? */ | ||
411 | return (s == ms->src_end) ? s : NULL; /* check end of string */ | ||
412 | else goto dflt; | ||
413 | } | ||
414 | default: dflt: { /* it is a pattern item */ | ||
415 | const char *ep = classend(ms, p); /* points to what is next */ | ||
416 | int m = s<ms->src_end && singlematch(uchar(*s), p, ep); | ||
417 | switch (*ep) { | ||
418 | case '?': { /* optional */ | ||
419 | const char *res; | ||
420 | if (m && ((res=match(ms, s+1, ep+1)) != NULL)) | ||
421 | return res; | ||
422 | p=ep+1; goto init; /* else return match(ms, s, ep+1); */ | ||
423 | } | ||
424 | case '*': { /* 0 or more repetitions */ | ||
425 | return max_expand(ms, s, p, ep); | ||
426 | } | ||
427 | case '+': { /* 1 or more repetitions */ | ||
428 | return (m ? max_expand(ms, s+1, p, ep) : NULL); | ||
429 | } | ||
430 | case '-': { /* 0 or more repetitions (minimum) */ | ||
431 | return min_expand(ms, s, p, ep); | ||
432 | } | ||
433 | default: { | ||
434 | if (!m) return NULL; | ||
435 | s++; p=ep; goto init; /* else return match(ms, s+1, ep); */ | ||
436 | } | ||
437 | } | ||
438 | } | ||
439 | } | ||
440 | } | ||
441 | |||
442 | |||
443 | |||
444 | static const char *lmemfind (const char *s1, size_t l1, | ||
445 | const char *s2, size_t l2) { | ||
446 | if (l2 == 0) return s1; /* empty strings are everywhere */ | ||
447 | else if (l2 > l1) return NULL; /* avoids a negative `l1' */ | ||
448 | else { | ||
449 | const char *init; /* to search for a `*s2' inside `s1' */ | ||
450 | l2--; /* 1st char will be checked by `memchr' */ | ||
451 | l1 = l1-l2; /* `s2' cannot be found after that */ | ||
452 | while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) { | ||
453 | init++; /* 1st char is already checked */ | ||
454 | if (memcmp(init, s2+1, l2) == 0) | ||
455 | return init-1; | ||
456 | else { /* correct `l1' and `s1' to try again */ | ||
457 | l1 -= init-s1; | ||
458 | s1 = init; | ||
459 | } | ||
460 | } | ||
461 | return NULL; /* not found */ | ||
462 | } | ||
463 | } | ||
464 | |||
465 | |||
466 | static void push_onecapture (MatchState *ms, int i, const char *s, | ||
467 | const char *e) { | ||
468 | if (i >= ms->level) { | ||
469 | if (i == 0) /* ms->level == 0, too */ | ||
470 | lua_pushlstring(ms->L, s, e - s); /* add whole match */ | ||
471 | else | ||
472 | luaL_error(ms->L, "invalid capture index"); | ||
473 | } | ||
474 | else { | ||
475 | ptrdiff_t l = ms->capture[i].len; | ||
476 | if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture"); | ||
477 | if (l == CAP_POSITION) | ||
478 | lua_pushinteger(ms->L, ms->capture[i].init - ms->src_init + 1); | ||
479 | else | ||
480 | lua_pushlstring(ms->L, ms->capture[i].init, l); | ||
481 | } | ||
482 | } | ||
483 | |||
484 | |||
485 | static int push_captures (MatchState *ms, const char *s, const char *e) { | ||
486 | int i; | ||
487 | int nlevels = (ms->level == 0 && s) ? 1 : ms->level; | ||
488 | luaL_checkstack(ms->L, nlevels, "too many captures"); | ||
489 | for (i = 0; i < nlevels; i++) | ||
490 | push_onecapture(ms, i, s, e); | ||
491 | return nlevels; /* number of strings pushed */ | ||
492 | } | ||
493 | |||
494 | |||
495 | static int str_find_aux (lua_State *L, int find) { | ||
496 | size_t l1, l2; | ||
497 | const char *s = luaL_checklstring(L, 1, &l1); | ||
498 | const char *p = luaL_checklstring(L, 2, &l2); | ||
499 | ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1; | ||
500 | if (init < 0) init = 0; | ||
501 | else if ((size_t)(init) > l1) init = (ptrdiff_t)l1; | ||
502 | if (find && (lua_toboolean(L, 4) || /* explicit request? */ | ||
503 | strpbrk(p, SPECIALS) == NULL)) { /* or no special characters? */ | ||
504 | /* do a plain search */ | ||
505 | const char *s2 = lmemfind(s+init, l1-init, p, l2); | ||
506 | if (s2) { | ||
507 | lua_pushinteger(L, s2-s+1); | ||
508 | lua_pushinteger(L, s2-s+l2); | ||
509 | return 2; | ||
510 | } | ||
511 | } | ||
512 | else { | ||
513 | MatchState ms; | ||
514 | int anchor = (*p == '^') ? (p++, 1) : 0; | ||
515 | const char *s1=s+init; | ||
516 | ms.L = L; | ||
517 | ms.src_init = s; | ||
518 | ms.src_end = s+l1; | ||
519 | do { | ||
520 | const char *res; | ||
521 | ms.level = 0; | ||
522 | if ((res=match(&ms, s1, p)) != NULL) { | ||
523 | if (find) { | ||
524 | lua_pushinteger(L, s1-s+1); /* start */ | ||
525 | lua_pushinteger(L, res-s); /* end */ | ||
526 | return push_captures(&ms, NULL, 0) + 2; | ||
527 | } | ||
528 | else | ||
529 | return push_captures(&ms, s1, res); | ||
530 | } | ||
531 | } while (s1++ < ms.src_end && !anchor); | ||
532 | } | ||
533 | lua_pushnil(L); /* not found */ | ||
534 | return 1; | ||
535 | } | ||
536 | |||
537 | |||
538 | static int str_find (lua_State *L) { | ||
539 | return str_find_aux(L, 1); | ||
540 | } | ||
541 | |||
542 | |||
543 | static int str_match (lua_State *L) { | ||
544 | return str_find_aux(L, 0); | ||
545 | } | ||
546 | |||
547 | |||
548 | static int gmatch_aux (lua_State *L) { | ||
549 | MatchState ms; | ||
550 | size_t ls; | ||
551 | const char *s = lua_tolstring(L, lua_upvalueindex(1), &ls); | ||
552 | const char *p = lua_tostring(L, lua_upvalueindex(2)); | ||
553 | const char *src; | ||
554 | ms.L = L; | ||
555 | ms.src_init = s; | ||
556 | ms.src_end = s+ls; | ||
557 | for (src = s + (size_t)lua_tointeger(L, lua_upvalueindex(3)); | ||
558 | src <= ms.src_end; | ||
559 | src++) { | ||
560 | const char *e; | ||
561 | ms.level = 0; | ||
562 | if ((e = match(&ms, src, p)) != NULL) { | ||
563 | lua_Integer newstart = e-s; | ||
564 | if (e == src) newstart++; /* empty match? go at least one position */ | ||
565 | lua_pushinteger(L, newstart); | ||
566 | lua_replace(L, lua_upvalueindex(3)); | ||
567 | return push_captures(&ms, src, e); | ||
568 | } | ||
569 | } | ||
570 | return 0; /* not found */ | ||
571 | } | ||
572 | |||
573 | |||
574 | static int gmatch (lua_State *L) { | ||
575 | luaL_checkstring(L, 1); | ||
576 | luaL_checkstring(L, 2); | ||
577 | lua_settop(L, 2); | ||
578 | lua_pushinteger(L, 0); | ||
579 | lua_pushcclosure(L, gmatch_aux, 3); | ||
580 | return 1; | ||
581 | } | ||
582 | |||
583 | |||
584 | static int gfind_nodef (lua_State *L) { | ||
585 | return luaL_error(L, LUA_QL("string.gfind") " was renamed to " | ||
586 | LUA_QL("string.gmatch")); | ||
587 | } | ||
588 | |||
589 | |||
590 | static void add_s (MatchState *ms, luaL_Buffer *b, const char *s, | ||
591 | const char *e) { | ||
592 | size_t l, i; | ||
593 | const char *news = lua_tolstring(ms->L, 3, &l); | ||
594 | for (i = 0; i < l; i++) { | ||
595 | if (news[i] != L_ESC) | ||
596 | luaL_addchar(b, news[i]); | ||
597 | else { | ||
598 | i++; /* skip ESC */ | ||
599 | if (!isdigit(uchar(news[i]))) | ||
600 | luaL_addchar(b, news[i]); | ||
601 | else if (news[i] == '0') | ||
602 | luaL_addlstring(b, s, e - s); | ||
603 | else { | ||
604 | push_onecapture(ms, news[i] - '1', s, e); | ||
605 | luaL_addvalue(b); /* add capture to accumulated result */ | ||
606 | } | ||
607 | } | ||
608 | } | ||
609 | } | ||
610 | |||
611 | |||
612 | static void add_value (MatchState *ms, luaL_Buffer *b, const char *s, | ||
613 | const char *e) { | ||
614 | lua_State *L = ms->L; | ||
615 | switch (lua_type(L, 3)) { | ||
616 | case LUA_TNUMBER: | ||
617 | case LUA_TSTRING: { | ||
618 | add_s(ms, b, s, e); | ||
619 | return; | ||
620 | } | ||
621 | case LUA_TFUNCTION: { | ||
622 | int n; | ||
623 | lua_pushvalue(L, 3); | ||
624 | n = push_captures(ms, s, e); | ||
625 | lua_call(L, n, 1); | ||
626 | break; | ||
627 | } | ||
628 | case LUA_TTABLE: { | ||
629 | push_onecapture(ms, 0, s, e); | ||
630 | lua_gettable(L, 3); | ||
631 | break; | ||
632 | } | ||
633 | } | ||
634 | if (!lua_toboolean(L, -1)) { /* nil or false? */ | ||
635 | lua_pop(L, 1); | ||
636 | lua_pushlstring(L, s, e - s); /* keep original text */ | ||
637 | } | ||
638 | else if (!lua_isstring(L, -1)) | ||
639 | luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1)); | ||
640 | luaL_addvalue(b); /* add result to accumulator */ | ||
641 | } | ||
642 | |||
643 | |||
644 | static int str_gsub (lua_State *L) { | ||
645 | size_t srcl; | ||
646 | const char *src = luaL_checklstring(L, 1, &srcl); | ||
647 | const char *p = luaL_checkstring(L, 2); | ||
648 | int tr = lua_type(L, 3); | ||
649 | int max_s = luaL_optint(L, 4, srcl+1); | ||
650 | int anchor = (*p == '^') ? (p++, 1) : 0; | ||
651 | int n = 0; | ||
652 | MatchState ms; | ||
653 | luaL_Buffer b; | ||
654 | luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING || | ||
655 | tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3, | ||
656 | "string/function/table expected"); | ||
657 | luaL_buffinit(L, &b); | ||
658 | ms.L = L; | ||
659 | ms.src_init = src; | ||
660 | ms.src_end = src+srcl; | ||
661 | while (n < max_s) { | ||
662 | const char *e; | ||
663 | ms.level = 0; | ||
664 | e = match(&ms, src, p); | ||
665 | if (e) { | ||
666 | n++; | ||
667 | add_value(&ms, &b, src, e); | ||
668 | } | ||
669 | if (e && e>src) /* non empty match? */ | ||
670 | src = e; /* skip it */ | ||
671 | else if (src < ms.src_end) | ||
672 | luaL_addchar(&b, *src++); | ||
673 | else break; | ||
674 | if (anchor) break; | ||
675 | } | ||
676 | luaL_addlstring(&b, src, ms.src_end-src); | ||
677 | luaL_pushresult(&b); | ||
678 | lua_pushinteger(L, n); /* number of substitutions */ | ||
679 | return 2; | ||
680 | } | ||
681 | |||
682 | /* }====================================================== */ | ||
683 | |||
684 | |||
685 | /* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */ | ||
686 | #define MAX_ITEM 512 | ||
687 | /* valid flags in a format specification */ | ||
688 | #define FLAGS "-+ #0" | ||
689 | /* | ||
690 | ** maximum size of each format specification (such as '%-099.99d') | ||
691 | ** (+10 accounts for %99.99x plus margin of error) | ||
692 | */ | ||
693 | #define MAX_FORMAT (sizeof(FLAGS) + sizeof(LUA_INTFRMLEN) + 10) | ||
694 | |||
695 | |||
696 | static void addquoted (lua_State *L, luaL_Buffer *b, int arg) { | ||
697 | size_t l; | ||
698 | const char *s = luaL_checklstring(L, arg, &l); | ||
699 | luaL_addchar(b, '"'); | ||
700 | while (l--) { | ||
701 | switch (*s) { | ||
702 | case '"': case '\\': case '\n': { | ||
703 | luaL_addchar(b, '\\'); | ||
704 | luaL_addchar(b, *s); | ||
705 | break; | ||
706 | } | ||
707 | case '\r': { | ||
708 | luaL_addlstring(b, "\\r", 2); | ||
709 | break; | ||
710 | } | ||
711 | case '\0': { | ||
712 | luaL_addlstring(b, "\\000", 4); | ||
713 | break; | ||
714 | } | ||
715 | default: { | ||
716 | luaL_addchar(b, *s); | ||
717 | break; | ||
718 | } | ||
719 | } | ||
720 | s++; | ||
721 | } | ||
722 | luaL_addchar(b, '"'); | ||
723 | } | ||
724 | |||
725 | static const char *scanformat (lua_State *L, const char *strfrmt, char *form) { | ||
726 | const char *p = strfrmt; | ||
727 | while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++; /* skip flags */ | ||
728 | if ((size_t)(p - strfrmt) >= sizeof(FLAGS)) | ||
729 | luaL_error(L, "invalid format (repeated flags)"); | ||
730 | if (isdigit(uchar(*p))) p++; /* skip width */ | ||
731 | if (isdigit(uchar(*p))) p++; /* (2 digits at most) */ | ||
732 | if (*p == '.') { | ||
733 | p++; | ||
734 | if (isdigit(uchar(*p))) p++; /* skip precision */ | ||
735 | if (isdigit(uchar(*p))) p++; /* (2 digits at most) */ | ||
736 | } | ||
737 | if (isdigit(uchar(*p))) | ||
738 | luaL_error(L, "invalid format (width or precision too long)"); | ||
739 | *(form++) = '%'; | ||
740 | strncpy(form, strfrmt, p - strfrmt + 1); | ||
741 | form += p - strfrmt + 1; | ||
742 | *form = '\0'; | ||
743 | return p; | ||
744 | } | ||
745 | |||
746 | |||
747 | static void addintlen (char *form) { | ||
748 | size_t l = strlen(form); | ||
749 | char spec = form[l - 1]; | ||
750 | strcpy(form + l - 1, LUA_INTFRMLEN); | ||
751 | form[l + sizeof(LUA_INTFRMLEN) - 2] = spec; | ||
752 | form[l + sizeof(LUA_INTFRMLEN) - 1] = '\0'; | ||
753 | } | ||
754 | |||
755 | |||
756 | static int str_format (lua_State *L) { | ||
757 | int arg = 1; | ||
758 | size_t sfl; | ||
759 | const char *strfrmt = luaL_checklstring(L, arg, &sfl); | ||
760 | const char *strfrmt_end = strfrmt+sfl; | ||
761 | luaL_Buffer b; | ||
762 | luaL_buffinit(L, &b); | ||
763 | while (strfrmt < strfrmt_end) { | ||
764 | if (*strfrmt != L_ESC) | ||
765 | luaL_addchar(&b, *strfrmt++); | ||
766 | else if (*++strfrmt == L_ESC) | ||
767 | luaL_addchar(&b, *strfrmt++); /* %% */ | ||
768 | else { /* format item */ | ||
769 | char form[MAX_FORMAT]; /* to store the format (`%...') */ | ||
770 | char buff[MAX_ITEM]; /* to store the formatted item */ | ||
771 | arg++; | ||
772 | strfrmt = scanformat(L, strfrmt, form); | ||
773 | switch (*strfrmt++) { | ||
774 | case 'c': { | ||
775 | snprintf(buff, MAX_ITEM, form, (int)luaL_checknumber(L, arg)); | ||
776 | break; | ||
777 | } | ||
778 | case 'd': case 'i': { | ||
779 | addintlen(form); | ||
780 | snprintf(buff, MAX_ITEM, form, (LUA_INTFRM_T)luaL_checknumber(L, arg)); | ||
781 | break; | ||
782 | } | ||
783 | case 'o': case 'u': case 'x': case 'X': { | ||
784 | addintlen(form); | ||
785 | snprintf(buff, MAX_ITEM, form, (unsigned LUA_INTFRM_T)luaL_checknumber(L, arg)); | ||
786 | break; | ||
787 | } | ||
788 | case 'e': case 'E': case 'f': | ||
789 | case 'g': case 'G': { | ||
790 | snprintf(buff, MAX_ITEM, form, (double)luaL_checknumber(L, arg)); | ||
791 | break; | ||
792 | } | ||
793 | case 'q': { | ||
794 | addquoted(L, &b, arg); | ||
795 | continue; /* skip the 'addsize' at the end */ | ||
796 | } | ||
797 | case 's': { | ||
798 | size_t l; | ||
799 | const char *s = luaL_checklstring(L, arg, &l); | ||
800 | if (!strchr(form, '.') && l >= 100) { | ||
801 | /* no precision and string is too long to be formatted; | ||
802 | keep original string */ | ||
803 | lua_pushvalue(L, arg); | ||
804 | luaL_addvalue(&b); | ||
805 | continue; /* skip the `addsize' at the end */ | ||
806 | } | ||
807 | else { | ||
808 | snprintf(buff, MAX_ITEM, form, s); | ||
809 | break; | ||
810 | } | ||
811 | } | ||
812 | default: { /* also treat cases `pnLlh' */ | ||
813 | return luaL_error(L, "invalid option " LUA_QL("%%%c") " to " | ||
814 | LUA_QL("format"), *(strfrmt - 1)); | ||
815 | } | ||
816 | } | ||
817 | luaL_addlstring(&b, buff, strlen(buff)); | ||
818 | } | ||
819 | } | ||
820 | luaL_pushresult(&b); | ||
821 | return 1; | ||
822 | } | ||
823 | |||
824 | |||
825 | static const luaL_Reg strlib[] = { | ||
826 | {"byte", str_byte}, | ||
827 | {"char", str_char}, | ||
828 | {"dump", str_dump}, | ||
829 | {"find", str_find}, | ||
830 | {"format", str_format}, | ||
831 | {"gfind", gfind_nodef}, | ||
832 | {"gmatch", gmatch}, | ||
833 | {"gsub", str_gsub}, | ||
834 | {"len", str_len}, | ||
835 | {"lower", str_lower}, | ||
836 | {"match", str_match}, | ||
837 | {"rep", str_rep}, | ||
838 | {"reverse", str_reverse}, | ||
839 | {"sub", str_sub}, | ||
840 | {"upper", str_upper}, | ||
841 | {NULL, NULL} | ||
842 | }; | ||
843 | |||
844 | |||
845 | static void createmetatable (lua_State *L) { | ||
846 | lua_createtable(L, 0, 1); /* create metatable for strings */ | ||
847 | lua_pushliteral(L, ""); /* dummy string */ | ||
848 | lua_pushvalue(L, -2); | ||
849 | lua_setmetatable(L, -2); /* set string metatable */ | ||
850 | lua_pop(L, 1); /* pop dummy string */ | ||
851 | lua_pushvalue(L, -2); /* string library... */ | ||
852 | lua_setfield(L, -2, "__index"); /* ...is the __index metamethod */ | ||
853 | lua_pop(L, 1); /* pop metatable */ | ||
854 | } | ||
855 | |||
856 | |||
857 | /* | ||
858 | ** Open string library | ||
859 | */ | ||
860 | LUALIB_API int luaopen_string (lua_State *L) { | ||
861 | luaL_register(L, LUA_STRLIBNAME, strlib); | ||
862 | #if defined(LUA_COMPAT_GFIND) | ||
863 | lua_getfield(L, -1, "gmatch"); | ||
864 | lua_setfield(L, -2, "gfind"); | ||
865 | #endif | ||
866 | createmetatable(L); | ||
867 | return 1; | ||
868 | } | ||
869 | |||
diff --git a/apps/plugins/lua/ltable.c b/apps/plugins/lua/ltable.c new file mode 100644 index 0000000000..ec84f4fabc --- /dev/null +++ b/apps/plugins/lua/ltable.c | |||
@@ -0,0 +1,588 @@ | |||
1 | /* | ||
2 | ** $Id: ltable.c,v 2.32.1.2 2007/12/28 15:32:23 roberto Exp $ | ||
3 | ** Lua tables (hash) | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | /* | ||
9 | ** Implementation of tables (aka arrays, objects, or hash tables). | ||
10 | ** Tables keep its elements in two parts: an array part and a hash part. | ||
11 | ** Non-negative integer keys are all candidates to be kept in the array | ||
12 | ** part. The actual size of the array is the largest `n' such that at | ||
13 | ** least half the slots between 0 and n are in use. | ||
14 | ** Hash uses a mix of chained scatter table with Brent's variation. | ||
15 | ** A main invariant of these tables is that, if an element is not | ||
16 | ** in its main position (i.e. the `original' position that its hash gives | ||
17 | ** to it), then the colliding element is in its own main position. | ||
18 | ** Hence even when the load factor reaches 100%, performance remains good. | ||
19 | */ | ||
20 | |||
21 | #include <math.h> | ||
22 | #include <string.h> | ||
23 | |||
24 | #define ltable_c | ||
25 | #define LUA_CORE | ||
26 | |||
27 | #include "lua.h" | ||
28 | |||
29 | #include "ldebug.h" | ||
30 | #include "ldo.h" | ||
31 | #include "lgc.h" | ||
32 | #include "lmem.h" | ||
33 | #include "lobject.h" | ||
34 | #include "lstate.h" | ||
35 | #include "ltable.h" | ||
36 | |||
37 | |||
38 | /* | ||
39 | ** max size of array part is 2^MAXBITS | ||
40 | */ | ||
41 | #if LUAI_BITSINT > 26 | ||
42 | #define MAXBITS 26 | ||
43 | #else | ||
44 | #define MAXBITS (LUAI_BITSINT-2) | ||
45 | #endif | ||
46 | |||
47 | #define MAXASIZE (1 << MAXBITS) | ||
48 | |||
49 | |||
50 | #define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t)))) | ||
51 | |||
52 | #define hashstr(t,str) hashpow2(t, (str)->tsv.hash) | ||
53 | #define hashboolean(t,p) hashpow2(t, p) | ||
54 | |||
55 | |||
56 | /* | ||
57 | ** for some types, it is better to avoid modulus by power of 2, as | ||
58 | ** they tend to have many 2 factors. | ||
59 | */ | ||
60 | #define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1)))) | ||
61 | |||
62 | |||
63 | #define hashpointer(t,p) hashmod(t, IntPoint(p)) | ||
64 | |||
65 | |||
66 | /* | ||
67 | ** number of ints inside a lua_Number | ||
68 | */ | ||
69 | #define numints cast_int(sizeof(lua_Number)/sizeof(int)) | ||
70 | |||
71 | |||
72 | |||
73 | #define dummynode (&dummynode_) | ||
74 | |||
75 | static const Node dummynode_ = { | ||
76 | {{NULL}, LUA_TNIL}, /* value */ | ||
77 | {{{NULL}, LUA_TNIL, NULL}} /* key */ | ||
78 | }; | ||
79 | |||
80 | |||
81 | /* | ||
82 | ** hash for lua_Numbers | ||
83 | */ | ||
84 | static Node *hashnum (const Table *t, lua_Number n) { | ||
85 | unsigned int a[numints]; | ||
86 | int i; | ||
87 | if (luai_numeq(n, 0)) /* avoid problems with -0 */ | ||
88 | return gnode(t, 0); | ||
89 | memcpy(a, &n, sizeof(a)); | ||
90 | for (i = 1; i < numints; i++) a[0] += a[i]; | ||
91 | return hashmod(t, a[0]); | ||
92 | } | ||
93 | |||
94 | |||
95 | |||
96 | /* | ||
97 | ** returns the `main' position of an element in a table (that is, the index | ||
98 | ** of its hash value) | ||
99 | */ | ||
100 | static Node *mainposition (const Table *t, const TValue *key) { | ||
101 | switch (ttype(key)) { | ||
102 | case LUA_TNUMBER: | ||
103 | return hashnum(t, nvalue(key)); | ||
104 | case LUA_TSTRING: | ||
105 | return hashstr(t, rawtsvalue(key)); | ||
106 | case LUA_TBOOLEAN: | ||
107 | return hashboolean(t, bvalue(key)); | ||
108 | case LUA_TLIGHTUSERDATA: | ||
109 | return hashpointer(t, pvalue(key)); | ||
110 | default: | ||
111 | return hashpointer(t, gcvalue(key)); | ||
112 | } | ||
113 | } | ||
114 | |||
115 | |||
116 | /* | ||
117 | ** returns the index for `key' if `key' is an appropriate key to live in | ||
118 | ** the array part of the table, -1 otherwise. | ||
119 | */ | ||
120 | static int arrayindex (const TValue *key) { | ||
121 | if (ttisnumber(key)) { | ||
122 | lua_Number n = nvalue(key); | ||
123 | int k; | ||
124 | lua_number2int(k, n); | ||
125 | if (luai_numeq(cast_num(k), n)) | ||
126 | return k; | ||
127 | } | ||
128 | return -1; /* `key' did not match some condition */ | ||
129 | } | ||
130 | |||
131 | |||
132 | /* | ||
133 | ** returns the index of a `key' for table traversals. First goes all | ||
134 | ** elements in the array part, then elements in the hash part. The | ||
135 | ** beginning of a traversal is signalled by -1. | ||
136 | */ | ||
137 | static int findindex (lua_State *L, Table *t, StkId key) { | ||
138 | int i; | ||
139 | if (ttisnil(key)) return -1; /* first iteration */ | ||
140 | i = arrayindex(key); | ||
141 | if (0 < i && i <= t->sizearray) /* is `key' inside array part? */ | ||
142 | return i-1; /* yes; that's the index (corrected to C) */ | ||
143 | else { | ||
144 | Node *n = mainposition(t, key); | ||
145 | do { /* check whether `key' is somewhere in the chain */ | ||
146 | /* key may be dead already, but it is ok to use it in `next' */ | ||
147 | if (luaO_rawequalObj(key2tval(n), key) || | ||
148 | (ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) && | ||
149 | gcvalue(gkey(n)) == gcvalue(key))) { | ||
150 | i = cast_int(n - gnode(t, 0)); /* key index in hash table */ | ||
151 | /* hash elements are numbered after array ones */ | ||
152 | return i + t->sizearray; | ||
153 | } | ||
154 | else n = gnext(n); | ||
155 | } while (n); | ||
156 | luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */ | ||
157 | return 0; /* to avoid warnings */ | ||
158 | } | ||
159 | } | ||
160 | |||
161 | |||
162 | int luaH_next (lua_State *L, Table *t, StkId key) { | ||
163 | int i = findindex(L, t, key); /* find original element */ | ||
164 | for (i++; i < t->sizearray; i++) { /* try first array part */ | ||
165 | if (!ttisnil(&t->array[i])) { /* a non-nil value? */ | ||
166 | setnvalue(key, cast_num(i+1)); | ||
167 | setobj2s(L, key+1, &t->array[i]); | ||
168 | return 1; | ||
169 | } | ||
170 | } | ||
171 | for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */ | ||
172 | if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */ | ||
173 | setobj2s(L, key, key2tval(gnode(t, i))); | ||
174 | setobj2s(L, key+1, gval(gnode(t, i))); | ||
175 | return 1; | ||
176 | } | ||
177 | } | ||
178 | return 0; /* no more elements */ | ||
179 | } | ||
180 | |||
181 | |||
182 | /* | ||
183 | ** {============================================================= | ||
184 | ** Rehash | ||
185 | ** ============================================================== | ||
186 | */ | ||
187 | |||
188 | |||
189 | static int computesizes (int nums[], int *narray) { | ||
190 | int i; | ||
191 | int twotoi; /* 2^i */ | ||
192 | int a = 0; /* number of elements smaller than 2^i */ | ||
193 | int na = 0; /* number of elements to go to array part */ | ||
194 | int n = 0; /* optimal size for array part */ | ||
195 | for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) { | ||
196 | if (nums[i] > 0) { | ||
197 | a += nums[i]; | ||
198 | if (a > twotoi/2) { /* more than half elements present? */ | ||
199 | n = twotoi; /* optimal size (till now) */ | ||
200 | na = a; /* all elements smaller than n will go to array part */ | ||
201 | } | ||
202 | } | ||
203 | if (a == *narray) break; /* all elements already counted */ | ||
204 | } | ||
205 | *narray = n; | ||
206 | lua_assert(*narray/2 <= na && na <= *narray); | ||
207 | return na; | ||
208 | } | ||
209 | |||
210 | |||
211 | static int countint (const TValue *key, int *nums) { | ||
212 | int k = arrayindex(key); | ||
213 | if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */ | ||
214 | nums[ceillog2(k)]++; /* count as such */ | ||
215 | return 1; | ||
216 | } | ||
217 | else | ||
218 | return 0; | ||
219 | } | ||
220 | |||
221 | |||
222 | static int numusearray (const Table *t, int *nums) { | ||
223 | int lg; | ||
224 | int ttlg; /* 2^lg */ | ||
225 | int ause = 0; /* summation of `nums' */ | ||
226 | int i = 1; /* count to traverse all array keys */ | ||
227 | for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) { /* for each slice */ | ||
228 | int lc = 0; /* counter */ | ||
229 | int lim = ttlg; | ||
230 | if (lim > t->sizearray) { | ||
231 | lim = t->sizearray; /* adjust upper limit */ | ||
232 | if (i > lim) | ||
233 | break; /* no more elements to count */ | ||
234 | } | ||
235 | /* count elements in range (2^(lg-1), 2^lg] */ | ||
236 | for (; i <= lim; i++) { | ||
237 | if (!ttisnil(&t->array[i-1])) | ||
238 | lc++; | ||
239 | } | ||
240 | nums[lg] += lc; | ||
241 | ause += lc; | ||
242 | } | ||
243 | return ause; | ||
244 | } | ||
245 | |||
246 | |||
247 | static int numusehash (const Table *t, int *nums, int *pnasize) { | ||
248 | int totaluse = 0; /* total number of elements */ | ||
249 | int ause = 0; /* summation of `nums' */ | ||
250 | int i = sizenode(t); | ||
251 | while (i--) { | ||
252 | Node *n = &t->node[i]; | ||
253 | if (!ttisnil(gval(n))) { | ||
254 | ause += countint(key2tval(n), nums); | ||
255 | totaluse++; | ||
256 | } | ||
257 | } | ||
258 | *pnasize += ause; | ||
259 | return totaluse; | ||
260 | } | ||
261 | |||
262 | |||
263 | static void setarrayvector (lua_State *L, Table *t, int size) { | ||
264 | int i; | ||
265 | luaM_reallocvector(L, t->array, t->sizearray, size, TValue); | ||
266 | for (i=t->sizearray; i<size; i++) | ||
267 | setnilvalue(&t->array[i]); | ||
268 | t->sizearray = size; | ||
269 | } | ||
270 | |||
271 | |||
272 | static void setnodevector (lua_State *L, Table *t, int size) { | ||
273 | int lsize; | ||
274 | if (size == 0) { /* no elements to hash part? */ | ||
275 | t->node = cast(Node *, dummynode); /* use common `dummynode' */ | ||
276 | lsize = 0; | ||
277 | } | ||
278 | else { | ||
279 | int i; | ||
280 | lsize = ceillog2(size); | ||
281 | if (lsize > MAXBITS) | ||
282 | luaG_runerror(L, "table overflow"); | ||
283 | size = twoto(lsize); | ||
284 | t->node = luaM_newvector(L, size, Node); | ||
285 | for (i=0; i<size; i++) { | ||
286 | Node *n = gnode(t, i); | ||
287 | gnext(n) = NULL; | ||
288 | setnilvalue(gkey(n)); | ||
289 | setnilvalue(gval(n)); | ||
290 | } | ||
291 | } | ||
292 | t->lsizenode = cast_byte(lsize); | ||
293 | t->lastfree = gnode(t, size); /* all positions are free */ | ||
294 | } | ||
295 | |||
296 | |||
297 | static void resize (lua_State *L, Table *t, int nasize, int nhsize) { | ||
298 | int i; | ||
299 | int oldasize = t->sizearray; | ||
300 | int oldhsize = t->lsizenode; | ||
301 | Node *nold = t->node; /* save old hash ... */ | ||
302 | if (nasize > oldasize) /* array part must grow? */ | ||
303 | setarrayvector(L, t, nasize); | ||
304 | /* create new hash part with appropriate size */ | ||
305 | setnodevector(L, t, nhsize); | ||
306 | if (nasize < oldasize) { /* array part must shrink? */ | ||
307 | t->sizearray = nasize; | ||
308 | /* re-insert elements from vanishing slice */ | ||
309 | for (i=nasize; i<oldasize; i++) { | ||
310 | if (!ttisnil(&t->array[i])) | ||
311 | setobjt2t(L, luaH_setnum(L, t, i+1), &t->array[i]); | ||
312 | } | ||
313 | /* shrink array */ | ||
314 | luaM_reallocvector(L, t->array, oldasize, nasize, TValue); | ||
315 | } | ||
316 | /* re-insert elements from hash part */ | ||
317 | for (i = twoto(oldhsize) - 1; i >= 0; i--) { | ||
318 | Node *old = nold+i; | ||
319 | if (!ttisnil(gval(old))) | ||
320 | setobjt2t(L, luaH_set(L, t, key2tval(old)), gval(old)); | ||
321 | } | ||
322 | if (nold != dummynode) | ||
323 | luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */ | ||
324 | } | ||
325 | |||
326 | |||
327 | void luaH_resizearray (lua_State *L, Table *t, int nasize) { | ||
328 | int nsize = (t->node == dummynode) ? 0 : sizenode(t); | ||
329 | resize(L, t, nasize, nsize); | ||
330 | } | ||
331 | |||
332 | |||
333 | static void rehash (lua_State *L, Table *t, const TValue *ek) { | ||
334 | int nasize, na; | ||
335 | int nums[MAXBITS+1]; /* nums[i] = number of keys between 2^(i-1) and 2^i */ | ||
336 | int i; | ||
337 | int totaluse; | ||
338 | for (i=0; i<=MAXBITS; i++) nums[i] = 0; /* reset counts */ | ||
339 | nasize = numusearray(t, nums); /* count keys in array part */ | ||
340 | totaluse = nasize; /* all those keys are integer keys */ | ||
341 | totaluse += numusehash(t, nums, &nasize); /* count keys in hash part */ | ||
342 | /* count extra key */ | ||
343 | nasize += countint(ek, nums); | ||
344 | totaluse++; | ||
345 | /* compute new size for array part */ | ||
346 | na = computesizes(nums, &nasize); | ||
347 | /* resize the table to new computed sizes */ | ||
348 | resize(L, t, nasize, totaluse - na); | ||
349 | } | ||
350 | |||
351 | |||
352 | |||
353 | /* | ||
354 | ** }============================================================= | ||
355 | */ | ||
356 | |||
357 | |||
358 | Table *luaH_new (lua_State *L, int narray, int nhash) { | ||
359 | Table *t = luaM_new(L, Table); | ||
360 | luaC_link(L, obj2gco(t), LUA_TTABLE); | ||
361 | t->metatable = NULL; | ||
362 | t->flags = cast_byte(~0); | ||
363 | /* temporary values (kept only if some malloc fails) */ | ||
364 | t->array = NULL; | ||
365 | t->sizearray = 0; | ||
366 | t->lsizenode = 0; | ||
367 | t->node = cast(Node *, dummynode); | ||
368 | setarrayvector(L, t, narray); | ||
369 | setnodevector(L, t, nhash); | ||
370 | return t; | ||
371 | } | ||
372 | |||
373 | |||
374 | void luaH_free (lua_State *L, Table *t) { | ||
375 | if (t->node != dummynode) | ||
376 | luaM_freearray(L, t->node, sizenode(t), Node); | ||
377 | luaM_freearray(L, t->array, t->sizearray, TValue); | ||
378 | luaM_free(L, t); | ||
379 | } | ||
380 | |||
381 | |||
382 | static Node *getfreepos (Table *t) { | ||
383 | while (t->lastfree-- > t->node) { | ||
384 | if (ttisnil(gkey(t->lastfree))) | ||
385 | return t->lastfree; | ||
386 | } | ||
387 | return NULL; /* could not find a free place */ | ||
388 | } | ||
389 | |||
390 | |||
391 | |||
392 | /* | ||
393 | ** inserts a new key into a hash table; first, check whether key's main | ||
394 | ** position is free. If not, check whether colliding node is in its main | ||
395 | ** position or not: if it is not, move colliding node to an empty place and | ||
396 | ** put new key in its main position; otherwise (colliding node is in its main | ||
397 | ** position), new key goes to an empty position. | ||
398 | */ | ||
399 | static TValue *newkey (lua_State *L, Table *t, const TValue *key) { | ||
400 | Node *mp = mainposition(t, key); | ||
401 | if (!ttisnil(gval(mp)) || mp == dummynode) { | ||
402 | Node *othern; | ||
403 | Node *n = getfreepos(t); /* get a free place */ | ||
404 | if (n == NULL) { /* cannot find a free place? */ | ||
405 | rehash(L, t, key); /* grow table */ | ||
406 | return luaH_set(L, t, key); /* re-insert key into grown table */ | ||
407 | } | ||
408 | lua_assert(n != dummynode); | ||
409 | othern = mainposition(t, key2tval(mp)); | ||
410 | if (othern != mp) { /* is colliding node out of its main position? */ | ||
411 | /* yes; move colliding node into free position */ | ||
412 | while (gnext(othern) != mp) othern = gnext(othern); /* find previous */ | ||
413 | gnext(othern) = n; /* redo the chain with `n' in place of `mp' */ | ||
414 | *n = *mp; /* copy colliding node into free pos. (mp->next also goes) */ | ||
415 | gnext(mp) = NULL; /* now `mp' is free */ | ||
416 | setnilvalue(gval(mp)); | ||
417 | } | ||
418 | else { /* colliding node is in its own main position */ | ||
419 | /* new node will go into free position */ | ||
420 | gnext(n) = gnext(mp); /* chain new position */ | ||
421 | gnext(mp) = n; | ||
422 | mp = n; | ||
423 | } | ||
424 | } | ||
425 | gkey(mp)->value = key->value; gkey(mp)->tt = key->tt; | ||
426 | luaC_barriert(L, t, key); | ||
427 | lua_assert(ttisnil(gval(mp))); | ||
428 | return gval(mp); | ||
429 | } | ||
430 | |||
431 | |||
432 | /* | ||
433 | ** search function for integers | ||
434 | */ | ||
435 | const TValue *luaH_getnum (Table *t, int key) { | ||
436 | /* (1 <= key && key <= t->sizearray) */ | ||
437 | if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray)) | ||
438 | return &t->array[key-1]; | ||
439 | else { | ||
440 | lua_Number nk = cast_num(key); | ||
441 | Node *n = hashnum(t, nk); | ||
442 | do { /* check whether `key' is somewhere in the chain */ | ||
443 | if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk)) | ||
444 | return gval(n); /* that's it */ | ||
445 | else n = gnext(n); | ||
446 | } while (n); | ||
447 | return luaO_nilobject; | ||
448 | } | ||
449 | } | ||
450 | |||
451 | |||
452 | /* | ||
453 | ** search function for strings | ||
454 | */ | ||
455 | const TValue *luaH_getstr (Table *t, TString *key) { | ||
456 | Node *n = hashstr(t, key); | ||
457 | do { /* check whether `key' is somewhere in the chain */ | ||
458 | if (ttisstring(gkey(n)) && rawtsvalue(gkey(n)) == key) | ||
459 | return gval(n); /* that's it */ | ||
460 | else n = gnext(n); | ||
461 | } while (n); | ||
462 | return luaO_nilobject; | ||
463 | } | ||
464 | |||
465 | |||
466 | /* | ||
467 | ** main search function | ||
468 | */ | ||
469 | const TValue *luaH_get (Table *t, const TValue *key) { | ||
470 | switch (ttype(key)) { | ||
471 | case LUA_TNIL: return luaO_nilobject; | ||
472 | case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key)); | ||
473 | case LUA_TNUMBER: { | ||
474 | int k; | ||
475 | lua_Number n = nvalue(key); | ||
476 | lua_number2int(k, n); | ||
477 | if (luai_numeq(cast_num(k), nvalue(key))) /* index is int? */ | ||
478 | return luaH_getnum(t, k); /* use specialized version */ | ||
479 | /* else go through */ | ||
480 | } | ||
481 | default: { | ||
482 | Node *n = mainposition(t, key); | ||
483 | do { /* check whether `key' is somewhere in the chain */ | ||
484 | if (luaO_rawequalObj(key2tval(n), key)) | ||
485 | return gval(n); /* that's it */ | ||
486 | else n = gnext(n); | ||
487 | } while (n); | ||
488 | return luaO_nilobject; | ||
489 | } | ||
490 | } | ||
491 | } | ||
492 | |||
493 | |||
494 | TValue *luaH_set (lua_State *L, Table *t, const TValue *key) { | ||
495 | const TValue *p = luaH_get(t, key); | ||
496 | t->flags = 0; | ||
497 | if (p != luaO_nilobject) | ||
498 | return cast(TValue *, p); | ||
499 | else { | ||
500 | if (ttisnil(key)) luaG_runerror(L, "table index is nil"); | ||
501 | else if (ttisnumber(key) && luai_numisnan(nvalue(key))) | ||
502 | luaG_runerror(L, "table index is NaN"); | ||
503 | return newkey(L, t, key); | ||
504 | } | ||
505 | } | ||
506 | |||
507 | |||
508 | TValue *luaH_setnum (lua_State *L, Table *t, int key) { | ||
509 | const TValue *p = luaH_getnum(t, key); | ||
510 | if (p != luaO_nilobject) | ||
511 | return cast(TValue *, p); | ||
512 | else { | ||
513 | TValue k; | ||
514 | setnvalue(&k, cast_num(key)); | ||
515 | return newkey(L, t, &k); | ||
516 | } | ||
517 | } | ||
518 | |||
519 | |||
520 | TValue *luaH_setstr (lua_State *L, Table *t, TString *key) { | ||
521 | const TValue *p = luaH_getstr(t, key); | ||
522 | if (p != luaO_nilobject) | ||
523 | return cast(TValue *, p); | ||
524 | else { | ||
525 | TValue k; | ||
526 | setsvalue(L, &k, key); | ||
527 | return newkey(L, t, &k); | ||
528 | } | ||
529 | } | ||
530 | |||
531 | |||
532 | static int unbound_search (Table *t, unsigned int j) { | ||
533 | unsigned int i = j; /* i is zero or a present index */ | ||
534 | j++; | ||
535 | /* find `i' and `j' such that i is present and j is not */ | ||
536 | while (!ttisnil(luaH_getnum(t, j))) { | ||
537 | i = j; | ||
538 | j *= 2; | ||
539 | if (j > cast(unsigned int, MAX_INT)) { /* overflow? */ | ||
540 | /* table was built with bad purposes: resort to linear search */ | ||
541 | i = 1; | ||
542 | while (!ttisnil(luaH_getnum(t, i))) i++; | ||
543 | return i - 1; | ||
544 | } | ||
545 | } | ||
546 | /* now do a binary search between them */ | ||
547 | while (j - i > 1) { | ||
548 | unsigned int m = (i+j)/2; | ||
549 | if (ttisnil(luaH_getnum(t, m))) j = m; | ||
550 | else i = m; | ||
551 | } | ||
552 | return i; | ||
553 | } | ||
554 | |||
555 | |||
556 | /* | ||
557 | ** Try to find a boundary in table `t'. A `boundary' is an integer index | ||
558 | ** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil). | ||
559 | */ | ||
560 | int luaH_getn (Table *t) { | ||
561 | unsigned int j = t->sizearray; | ||
562 | if (j > 0 && ttisnil(&t->array[j - 1])) { | ||
563 | /* there is a boundary in the array part: (binary) search for it */ | ||
564 | unsigned int i = 0; | ||
565 | while (j - i > 1) { | ||
566 | unsigned int m = (i+j)/2; | ||
567 | if (ttisnil(&t->array[m - 1])) j = m; | ||
568 | else i = m; | ||
569 | } | ||
570 | return i; | ||
571 | } | ||
572 | /* else must find a boundary in hash part */ | ||
573 | else if (t->node == dummynode) /* hash part is empty? */ | ||
574 | return j; /* that is easy... */ | ||
575 | else return unbound_search(t, j); | ||
576 | } | ||
577 | |||
578 | |||
579 | |||
580 | #if defined(LUA_DEBUG) | ||
581 | |||
582 | Node *luaH_mainposition (const Table *t, const TValue *key) { | ||
583 | return mainposition(t, key); | ||
584 | } | ||
585 | |||
586 | int luaH_isdummy (Node *n) { return n == dummynode; } | ||
587 | |||
588 | #endif | ||
diff --git a/apps/plugins/lua/ltable.h b/apps/plugins/lua/ltable.h new file mode 100644 index 0000000000..aa28914871 --- /dev/null +++ b/apps/plugins/lua/ltable.h | |||
@@ -0,0 +1,40 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Lua tables (hash) | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef ltable_h | ||
8 | #define ltable_h | ||
9 | |||
10 | #include "lobject.h" | ||
11 | |||
12 | |||
13 | #define gnode(t,i) (&(t)->node[i]) | ||
14 | #define gkey(n) (&(n)->i_key.nk) | ||
15 | #define gval(n) (&(n)->i_val) | ||
16 | #define gnext(n) ((n)->i_key.nk.next) | ||
17 | |||
18 | #define key2tval(n) (&(n)->i_key.tvk) | ||
19 | |||
20 | |||
21 | LUAI_FUNC const TValue *luaH_getnum (Table *t, int key); | ||
22 | LUAI_FUNC TValue *luaH_setnum (lua_State *L, Table *t, int key); | ||
23 | LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key); | ||
24 | LUAI_FUNC TValue *luaH_setstr (lua_State *L, Table *t, TString *key); | ||
25 | LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key); | ||
26 | LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key); | ||
27 | LUAI_FUNC Table *luaH_new (lua_State *L, int narray, int lnhash); | ||
28 | LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize); | ||
29 | LUAI_FUNC void luaH_free (lua_State *L, Table *t); | ||
30 | LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key); | ||
31 | LUAI_FUNC int luaH_getn (Table *t); | ||
32 | |||
33 | |||
34 | #if defined(LUA_DEBUG) | ||
35 | LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key); | ||
36 | LUAI_FUNC int luaH_isdummy (Node *n); | ||
37 | #endif | ||
38 | |||
39 | |||
40 | #endif | ||
diff --git a/apps/plugins/lua/ltablib.c b/apps/plugins/lua/ltablib.c new file mode 100644 index 0000000000..b6d9cb4ac7 --- /dev/null +++ b/apps/plugins/lua/ltablib.c | |||
@@ -0,0 +1,287 @@ | |||
1 | /* | ||
2 | ** $Id: ltablib.c,v 1.38.1.3 2008/02/14 16:46:58 roberto Exp $ | ||
3 | ** Library for Table Manipulation | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stddef.h> | ||
9 | |||
10 | #define ltablib_c | ||
11 | #define LUA_LIB | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "lauxlib.h" | ||
16 | #include "lualib.h" | ||
17 | |||
18 | |||
19 | #define aux_getn(L,n) (luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n)) | ||
20 | |||
21 | |||
22 | static int foreachi (lua_State *L) { | ||
23 | int i; | ||
24 | int n = aux_getn(L, 1); | ||
25 | luaL_checktype(L, 2, LUA_TFUNCTION); | ||
26 | for (i=1; i <= n; i++) { | ||
27 | lua_pushvalue(L, 2); /* function */ | ||
28 | lua_pushinteger(L, i); /* 1st argument */ | ||
29 | lua_rawgeti(L, 1, i); /* 2nd argument */ | ||
30 | lua_call(L, 2, 1); | ||
31 | if (!lua_isnil(L, -1)) | ||
32 | return 1; | ||
33 | lua_pop(L, 1); /* remove nil result */ | ||
34 | } | ||
35 | return 0; | ||
36 | } | ||
37 | |||
38 | |||
39 | static int foreach (lua_State *L) { | ||
40 | luaL_checktype(L, 1, LUA_TTABLE); | ||
41 | luaL_checktype(L, 2, LUA_TFUNCTION); | ||
42 | lua_pushnil(L); /* first key */ | ||
43 | while (lua_next(L, 1)) { | ||
44 | lua_pushvalue(L, 2); /* function */ | ||
45 | lua_pushvalue(L, -3); /* key */ | ||
46 | lua_pushvalue(L, -3); /* value */ | ||
47 | lua_call(L, 2, 1); | ||
48 | if (!lua_isnil(L, -1)) | ||
49 | return 1; | ||
50 | lua_pop(L, 2); /* remove value and result */ | ||
51 | } | ||
52 | return 0; | ||
53 | } | ||
54 | |||
55 | |||
56 | static int maxn (lua_State *L) { | ||
57 | lua_Number max = 0; | ||
58 | luaL_checktype(L, 1, LUA_TTABLE); | ||
59 | lua_pushnil(L); /* first key */ | ||
60 | while (lua_next(L, 1)) { | ||
61 | lua_pop(L, 1); /* remove value */ | ||
62 | if (lua_type(L, -1) == LUA_TNUMBER) { | ||
63 | lua_Number v = lua_tonumber(L, -1); | ||
64 | if (v > max) max = v; | ||
65 | } | ||
66 | } | ||
67 | lua_pushnumber(L, max); | ||
68 | return 1; | ||
69 | } | ||
70 | |||
71 | |||
72 | static int getn (lua_State *L) { | ||
73 | lua_pushinteger(L, aux_getn(L, 1)); | ||
74 | return 1; | ||
75 | } | ||
76 | |||
77 | |||
78 | static int setn (lua_State *L) { | ||
79 | luaL_checktype(L, 1, LUA_TTABLE); | ||
80 | #ifndef luaL_setn | ||
81 | luaL_setn(L, 1, luaL_checkint(L, 2)); | ||
82 | #else | ||
83 | luaL_error(L, LUA_QL("setn") " is obsolete"); | ||
84 | #endif | ||
85 | lua_pushvalue(L, 1); | ||
86 | return 1; | ||
87 | } | ||
88 | |||
89 | |||
90 | static int tinsert (lua_State *L) { | ||
91 | int e = aux_getn(L, 1) + 1; /* first empty element */ | ||
92 | int pos; /* where to insert new element */ | ||
93 | switch (lua_gettop(L)) { | ||
94 | case 2: { /* called with only 2 arguments */ | ||
95 | pos = e; /* insert new element at the end */ | ||
96 | break; | ||
97 | } | ||
98 | case 3: { | ||
99 | int i; | ||
100 | pos = luaL_checkint(L, 2); /* 2nd argument is the position */ | ||
101 | if (pos > e) e = pos; /* `grow' array if necessary */ | ||
102 | for (i = e; i > pos; i--) { /* move up elements */ | ||
103 | lua_rawgeti(L, 1, i-1); | ||
104 | lua_rawseti(L, 1, i); /* t[i] = t[i-1] */ | ||
105 | } | ||
106 | break; | ||
107 | } | ||
108 | default: { | ||
109 | return luaL_error(L, "wrong number of arguments to " LUA_QL("insert")); | ||
110 | } | ||
111 | } | ||
112 | luaL_setn(L, 1, e); /* new size */ | ||
113 | lua_rawseti(L, 1, pos); /* t[pos] = v */ | ||
114 | return 0; | ||
115 | } | ||
116 | |||
117 | |||
118 | static int tremove (lua_State *L) { | ||
119 | int e = aux_getn(L, 1); | ||
120 | int pos = luaL_optint(L, 2, e); | ||
121 | if (!(1 <= pos && pos <= e)) /* position is outside bounds? */ | ||
122 | return 0; /* nothing to remove */ | ||
123 | luaL_setn(L, 1, e - 1); /* t.n = n-1 */ | ||
124 | lua_rawgeti(L, 1, pos); /* result = t[pos] */ | ||
125 | for ( ;pos<e; pos++) { | ||
126 | lua_rawgeti(L, 1, pos+1); | ||
127 | lua_rawseti(L, 1, pos); /* t[pos] = t[pos+1] */ | ||
128 | } | ||
129 | lua_pushnil(L); | ||
130 | lua_rawseti(L, 1, e); /* t[e] = nil */ | ||
131 | return 1; | ||
132 | } | ||
133 | |||
134 | |||
135 | static void addfield (lua_State *L, luaL_Buffer *b, int i) { | ||
136 | lua_rawgeti(L, 1, i); | ||
137 | if (!lua_isstring(L, -1)) | ||
138 | luaL_error(L, "invalid value (%s) at index %d in table for " | ||
139 | LUA_QL("concat"), luaL_typename(L, -1), i); | ||
140 | luaL_addvalue(b); | ||
141 | } | ||
142 | |||
143 | |||
144 | static int tconcat (lua_State *L) { | ||
145 | luaL_Buffer b; | ||
146 | size_t lsep; | ||
147 | int i, last; | ||
148 | const char *sep = luaL_optlstring(L, 2, "", &lsep); | ||
149 | luaL_checktype(L, 1, LUA_TTABLE); | ||
150 | i = luaL_optint(L, 3, 1); | ||
151 | last = luaL_opt(L, luaL_checkint, 4, luaL_getn(L, 1)); | ||
152 | luaL_buffinit(L, &b); | ||
153 | for (; i < last; i++) { | ||
154 | addfield(L, &b, i); | ||
155 | luaL_addlstring(&b, sep, lsep); | ||
156 | } | ||
157 | if (i == last) /* add last value (if interval was not empty) */ | ||
158 | addfield(L, &b, i); | ||
159 | luaL_pushresult(&b); | ||
160 | return 1; | ||
161 | } | ||
162 | |||
163 | |||
164 | |||
165 | /* | ||
166 | ** {====================================================== | ||
167 | ** Quicksort | ||
168 | ** (based on `Algorithms in MODULA-3', Robert Sedgewick; | ||
169 | ** Addison-Wesley, 1993.) | ||
170 | */ | ||
171 | |||
172 | |||
173 | static void set2 (lua_State *L, int i, int j) { | ||
174 | lua_rawseti(L, 1, i); | ||
175 | lua_rawseti(L, 1, j); | ||
176 | } | ||
177 | |||
178 | static int sort_comp (lua_State *L, int a, int b) { | ||
179 | if (!lua_isnil(L, 2)) { /* function? */ | ||
180 | int res; | ||
181 | lua_pushvalue(L, 2); | ||
182 | lua_pushvalue(L, a-1); /* -1 to compensate function */ | ||
183 | lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */ | ||
184 | lua_call(L, 2, 1); | ||
185 | res = lua_toboolean(L, -1); | ||
186 | lua_pop(L, 1); | ||
187 | return res; | ||
188 | } | ||
189 | else /* a < b? */ | ||
190 | return lua_lessthan(L, a, b); | ||
191 | } | ||
192 | |||
193 | static void auxsort (lua_State *L, int l, int u) { | ||
194 | while (l < u) { /* for tail recursion */ | ||
195 | int i, j; | ||
196 | /* sort elements a[l], a[(l+u)/2] and a[u] */ | ||
197 | lua_rawgeti(L, 1, l); | ||
198 | lua_rawgeti(L, 1, u); | ||
199 | if (sort_comp(L, -1, -2)) /* a[u] < a[l]? */ | ||
200 | set2(L, l, u); /* swap a[l] - a[u] */ | ||
201 | else | ||
202 | lua_pop(L, 2); | ||
203 | if (u-l == 1) break; /* only 2 elements */ | ||
204 | i = (l+u)/2; | ||
205 | lua_rawgeti(L, 1, i); | ||
206 | lua_rawgeti(L, 1, l); | ||
207 | if (sort_comp(L, -2, -1)) /* a[i]<a[l]? */ | ||
208 | set2(L, i, l); | ||
209 | else { | ||
210 | lua_pop(L, 1); /* remove a[l] */ | ||
211 | lua_rawgeti(L, 1, u); | ||
212 | if (sort_comp(L, -1, -2)) /* a[u]<a[i]? */ | ||
213 | set2(L, i, u); | ||
214 | else | ||
215 | lua_pop(L, 2); | ||
216 | } | ||
217 | if (u-l == 2) break; /* only 3 elements */ | ||
218 | lua_rawgeti(L, 1, i); /* Pivot */ | ||
219 | lua_pushvalue(L, -1); | ||
220 | lua_rawgeti(L, 1, u-1); | ||
221 | set2(L, i, u-1); | ||
222 | /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */ | ||
223 | i = l; j = u-1; | ||
224 | for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */ | ||
225 | /* repeat ++i until a[i] >= P */ | ||
226 | while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) { | ||
227 | if (i>u) luaL_error(L, "invalid order function for sorting"); | ||
228 | lua_pop(L, 1); /* remove a[i] */ | ||
229 | } | ||
230 | /* repeat --j until a[j] <= P */ | ||
231 | while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) { | ||
232 | if (j<l) luaL_error(L, "invalid order function for sorting"); | ||
233 | lua_pop(L, 1); /* remove a[j] */ | ||
234 | } | ||
235 | if (j<i) { | ||
236 | lua_pop(L, 3); /* pop pivot, a[i], a[j] */ | ||
237 | break; | ||
238 | } | ||
239 | set2(L, i, j); | ||
240 | } | ||
241 | lua_rawgeti(L, 1, u-1); | ||
242 | lua_rawgeti(L, 1, i); | ||
243 | set2(L, u-1, i); /* swap pivot (a[u-1]) with a[i] */ | ||
244 | /* a[l..i-1] <= a[i] == P <= a[i+1..u] */ | ||
245 | /* adjust so that smaller half is in [j..i] and larger one in [l..u] */ | ||
246 | if (i-l < u-i) { | ||
247 | j=l; i=i-1; l=i+2; | ||
248 | } | ||
249 | else { | ||
250 | j=i+1; i=u; u=j-2; | ||
251 | } | ||
252 | auxsort(L, j, i); /* call recursively the smaller one */ | ||
253 | } /* repeat the routine for the larger one */ | ||
254 | } | ||
255 | |||
256 | static int sort (lua_State *L) { | ||
257 | int n = aux_getn(L, 1); | ||
258 | luaL_checkstack(L, 40, ""); /* assume array is smaller than 2^40 */ | ||
259 | if (!lua_isnoneornil(L, 2)) /* is there a 2nd argument? */ | ||
260 | luaL_checktype(L, 2, LUA_TFUNCTION); | ||
261 | lua_settop(L, 2); /* make sure there is two arguments */ | ||
262 | auxsort(L, 1, n); | ||
263 | return 0; | ||
264 | } | ||
265 | |||
266 | /* }====================================================== */ | ||
267 | |||
268 | |||
269 | static const luaL_Reg tab_funcs[] = { | ||
270 | {"concat", tconcat}, | ||
271 | {"foreach", foreach}, | ||
272 | {"foreachi", foreachi}, | ||
273 | {"getn", getn}, | ||
274 | {"maxn", maxn}, | ||
275 | {"insert", tinsert}, | ||
276 | {"remove", tremove}, | ||
277 | {"setn", setn}, | ||
278 | {"sort", sort}, | ||
279 | {NULL, NULL} | ||
280 | }; | ||
281 | |||
282 | |||
283 | LUALIB_API int luaopen_table (lua_State *L) { | ||
284 | luaL_register(L, LUA_TABLIBNAME, tab_funcs); | ||
285 | return 1; | ||
286 | } | ||
287 | |||
diff --git a/apps/plugins/lua/ltm.c b/apps/plugins/lua/ltm.c new file mode 100644 index 0000000000..c27f0f6fab --- /dev/null +++ b/apps/plugins/lua/ltm.c | |||
@@ -0,0 +1,75 @@ | |||
1 | /* | ||
2 | ** $Id: ltm.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** Tag methods | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <string.h> | ||
9 | |||
10 | #define ltm_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "lobject.h" | ||
16 | #include "lstate.h" | ||
17 | #include "lstring.h" | ||
18 | #include "ltable.h" | ||
19 | #include "ltm.h" | ||
20 | |||
21 | |||
22 | |||
23 | const char *const luaT_typenames[] = { | ||
24 | "nil", "boolean", "userdata", "number", | ||
25 | "string", "table", "function", "userdata", "thread", | ||
26 | "proto", "upval" | ||
27 | }; | ||
28 | |||
29 | |||
30 | void luaT_init (lua_State *L) { | ||
31 | static const char *const luaT_eventname[] = { /* ORDER TM */ | ||
32 | "__index", "__newindex", | ||
33 | "__gc", "__mode", "__eq", | ||
34 | "__add", "__sub", "__mul", "__div", "__mod", | ||
35 | "__pow", "__unm", "__len", "__lt", "__le", | ||
36 | "__concat", "__call" | ||
37 | }; | ||
38 | int i; | ||
39 | for (i=0; i<TM_N; i++) { | ||
40 | G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]); | ||
41 | luaS_fix(G(L)->tmname[i]); /* never collect these names */ | ||
42 | } | ||
43 | } | ||
44 | |||
45 | |||
46 | /* | ||
47 | ** function to be used with macro "fasttm": optimized for absence of | ||
48 | ** tag methods | ||
49 | */ | ||
50 | const TValue *luaT_gettm (Table *events, TMS event, TString *ename) { | ||
51 | const TValue *tm = luaH_getstr(events, ename); | ||
52 | lua_assert(event <= TM_EQ); | ||
53 | if (ttisnil(tm)) { /* no tag method? */ | ||
54 | events->flags |= cast_byte(1u<<event); /* cache this fact */ | ||
55 | return NULL; | ||
56 | } | ||
57 | else return tm; | ||
58 | } | ||
59 | |||
60 | |||
61 | const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) { | ||
62 | Table *mt; | ||
63 | switch (ttype(o)) { | ||
64 | case LUA_TTABLE: | ||
65 | mt = hvalue(o)->metatable; | ||
66 | break; | ||
67 | case LUA_TUSERDATA: | ||
68 | mt = uvalue(o)->metatable; | ||
69 | break; | ||
70 | default: | ||
71 | mt = G(L)->mt[ttype(o)]; | ||
72 | } | ||
73 | return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject); | ||
74 | } | ||
75 | |||
diff --git a/apps/plugins/lua/ltm.h b/apps/plugins/lua/ltm.h new file mode 100644 index 0000000000..1b89683ef3 --- /dev/null +++ b/apps/plugins/lua/ltm.h | |||
@@ -0,0 +1,54 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Tag methods | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef ltm_h | ||
8 | #define ltm_h | ||
9 | |||
10 | |||
11 | #include "lobject.h" | ||
12 | |||
13 | |||
14 | /* | ||
15 | * WARNING: if you change the order of this enumeration, | ||
16 | * grep "ORDER TM" | ||
17 | */ | ||
18 | typedef enum { | ||
19 | TM_INDEX, | ||
20 | TM_NEWINDEX, | ||
21 | TM_GC, | ||
22 | TM_MODE, | ||
23 | TM_EQ, /* last tag method with `fast' access */ | ||
24 | TM_ADD, | ||
25 | TM_SUB, | ||
26 | TM_MUL, | ||
27 | TM_DIV, | ||
28 | TM_MOD, | ||
29 | TM_POW, | ||
30 | TM_UNM, | ||
31 | TM_LEN, | ||
32 | TM_LT, | ||
33 | TM_LE, | ||
34 | TM_CONCAT, | ||
35 | TM_CALL, | ||
36 | TM_N /* number of elements in the enum */ | ||
37 | } TMS; | ||
38 | |||
39 | |||
40 | |||
41 | #define gfasttm(g,et,e) ((et) == NULL ? NULL : \ | ||
42 | ((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e])) | ||
43 | |||
44 | #define fasttm(l,et,e) gfasttm(G(l), et, e) | ||
45 | |||
46 | LUAI_DATA const char *const luaT_typenames[]; | ||
47 | |||
48 | |||
49 | LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename); | ||
50 | LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, | ||
51 | TMS event); | ||
52 | LUAI_FUNC void luaT_init (lua_State *L); | ||
53 | |||
54 | #endif | ||
diff --git a/apps/plugins/lua/lua.h b/apps/plugins/lua/lua.h new file mode 100644 index 0000000000..a0c57dc60b --- /dev/null +++ b/apps/plugins/lua/lua.h | |||
@@ -0,0 +1,388 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Lua - An Extensible Extension Language | ||
4 | ** Lua.org, PUC-Rio, Brazil (http://www.lua.org) | ||
5 | ** See Copyright Notice at the end of this file | ||
6 | */ | ||
7 | |||
8 | |||
9 | #ifndef lua_h | ||
10 | #define lua_h | ||
11 | |||
12 | #include <stdarg.h> | ||
13 | #include <stddef.h> | ||
14 | |||
15 | |||
16 | #include "luaconf.h" | ||
17 | |||
18 | |||
19 | #define LUA_VERSION "Lua 5.1" | ||
20 | #define LUA_RELEASE "Lua 5.1.4" | ||
21 | #define LUA_VERSION_NUM 501 | ||
22 | #define LUA_COPYRIGHT "Copyright (C) 1994-2008 Lua.org, PUC-Rio" | ||
23 | #define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo & W. Celes" | ||
24 | |||
25 | |||
26 | /* mark for precompiled code (`<esc>Lua') */ | ||
27 | #define LUA_SIGNATURE "\033Lua" | ||
28 | |||
29 | /* option for multiple returns in `lua_pcall' and `lua_call' */ | ||
30 | #define LUA_MULTRET (-1) | ||
31 | |||
32 | |||
33 | /* | ||
34 | ** pseudo-indices | ||
35 | */ | ||
36 | #define LUA_REGISTRYINDEX (-10000) | ||
37 | #define LUA_ENVIRONINDEX (-10001) | ||
38 | #define LUA_GLOBALSINDEX (-10002) | ||
39 | #define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i)) | ||
40 | |||
41 | |||
42 | /* thread status; 0 is OK */ | ||
43 | #define LUA_YIELD 1 | ||
44 | #define LUA_ERRRUN 2 | ||
45 | #define LUA_ERRSYNTAX 3 | ||
46 | #define LUA_ERRMEM 4 | ||
47 | #define LUA_ERRERR 5 | ||
48 | |||
49 | |||
50 | typedef struct lua_State lua_State; | ||
51 | |||
52 | typedef int (*lua_CFunction) (lua_State *L); | ||
53 | |||
54 | |||
55 | /* | ||
56 | ** functions that read/write blocks when loading/dumping Lua chunks | ||
57 | */ | ||
58 | typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz); | ||
59 | |||
60 | typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud); | ||
61 | |||
62 | |||
63 | /* | ||
64 | ** prototype for memory-allocation functions | ||
65 | */ | ||
66 | typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize); | ||
67 | |||
68 | |||
69 | /* | ||
70 | ** basic types | ||
71 | */ | ||
72 | #define LUA_TNONE (-1) | ||
73 | |||
74 | #define LUA_TNIL 0 | ||
75 | #define LUA_TBOOLEAN 1 | ||
76 | #define LUA_TLIGHTUSERDATA 2 | ||
77 | #define LUA_TNUMBER 3 | ||
78 | #define LUA_TSTRING 4 | ||
79 | #define LUA_TTABLE 5 | ||
80 | #define LUA_TFUNCTION 6 | ||
81 | #define LUA_TUSERDATA 7 | ||
82 | #define LUA_TTHREAD 8 | ||
83 | |||
84 | |||
85 | |||
86 | /* minimum Lua stack available to a C function */ | ||
87 | #define LUA_MINSTACK 20 | ||
88 | |||
89 | |||
90 | /* | ||
91 | ** generic extra include file | ||
92 | */ | ||
93 | #if defined(LUA_USER_H) | ||
94 | #include LUA_USER_H | ||
95 | #endif | ||
96 | |||
97 | |||
98 | /* type of numbers in Lua */ | ||
99 | typedef LUA_NUMBER lua_Number; | ||
100 | |||
101 | |||
102 | /* type for integer functions */ | ||
103 | typedef LUA_INTEGER lua_Integer; | ||
104 | |||
105 | |||
106 | |||
107 | /* | ||
108 | ** state manipulation | ||
109 | */ | ||
110 | LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud); | ||
111 | LUA_API void (lua_close) (lua_State *L); | ||
112 | LUA_API lua_State *(lua_newthread) (lua_State *L); | ||
113 | |||
114 | LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf); | ||
115 | |||
116 | |||
117 | /* | ||
118 | ** basic stack manipulation | ||
119 | */ | ||
120 | LUA_API int (lua_gettop) (lua_State *L); | ||
121 | LUA_API void (lua_settop) (lua_State *L, int idx); | ||
122 | LUA_API void (lua_pushvalue) (lua_State *L, int idx); | ||
123 | LUA_API void (lua_remove) (lua_State *L, int idx); | ||
124 | LUA_API void (lua_insert) (lua_State *L, int idx); | ||
125 | LUA_API void (lua_replace) (lua_State *L, int idx); | ||
126 | LUA_API int (lua_checkstack) (lua_State *L, int sz); | ||
127 | |||
128 | LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n); | ||
129 | |||
130 | |||
131 | /* | ||
132 | ** access functions (stack -> C) | ||
133 | */ | ||
134 | |||
135 | LUA_API int (lua_isnumber) (lua_State *L, int idx); | ||
136 | LUA_API int (lua_isstring) (lua_State *L, int idx); | ||
137 | LUA_API int (lua_iscfunction) (lua_State *L, int idx); | ||
138 | LUA_API int (lua_isuserdata) (lua_State *L, int idx); | ||
139 | LUA_API int (lua_type) (lua_State *L, int idx); | ||
140 | LUA_API const char *(lua_typename) (lua_State *L, int tp); | ||
141 | |||
142 | LUA_API int (lua_equal) (lua_State *L, int idx1, int idx2); | ||
143 | LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2); | ||
144 | LUA_API int (lua_lessthan) (lua_State *L, int idx1, int idx2); | ||
145 | |||
146 | LUA_API lua_Number (lua_tonumber) (lua_State *L, int idx); | ||
147 | LUA_API lua_Integer (lua_tointeger) (lua_State *L, int idx); | ||
148 | LUA_API int (lua_toboolean) (lua_State *L, int idx); | ||
149 | LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len); | ||
150 | LUA_API size_t (lua_objlen) (lua_State *L, int idx); | ||
151 | LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx); | ||
152 | LUA_API void *(lua_touserdata) (lua_State *L, int idx); | ||
153 | LUA_API lua_State *(lua_tothread) (lua_State *L, int idx); | ||
154 | LUA_API const void *(lua_topointer) (lua_State *L, int idx); | ||
155 | |||
156 | |||
157 | /* | ||
158 | ** push functions (C -> stack) | ||
159 | */ | ||
160 | LUA_API void (lua_pushnil) (lua_State *L); | ||
161 | LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n); | ||
162 | LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n); | ||
163 | LUA_API void (lua_pushlstring) (lua_State *L, const char *s, size_t l); | ||
164 | LUA_API void (lua_pushstring) (lua_State *L, const char *s); | ||
165 | LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt, | ||
166 | va_list argp); | ||
167 | LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...); | ||
168 | LUA_API void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n); | ||
169 | LUA_API void (lua_pushboolean) (lua_State *L, int b); | ||
170 | LUA_API void (lua_pushlightuserdata) (lua_State *L, void *p); | ||
171 | LUA_API int (lua_pushthread) (lua_State *L); | ||
172 | |||
173 | |||
174 | /* | ||
175 | ** get functions (Lua -> stack) | ||
176 | */ | ||
177 | LUA_API void (lua_gettable) (lua_State *L, int idx); | ||
178 | LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k); | ||
179 | LUA_API void (lua_rawget) (lua_State *L, int idx); | ||
180 | LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n); | ||
181 | LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec); | ||
182 | LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz); | ||
183 | LUA_API int (lua_getmetatable) (lua_State *L, int objindex); | ||
184 | LUA_API void (lua_getfenv) (lua_State *L, int idx); | ||
185 | |||
186 | |||
187 | /* | ||
188 | ** set functions (stack -> Lua) | ||
189 | */ | ||
190 | LUA_API void (lua_settable) (lua_State *L, int idx); | ||
191 | LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k); | ||
192 | LUA_API void (lua_rawset) (lua_State *L, int idx); | ||
193 | LUA_API void (lua_rawseti) (lua_State *L, int idx, int n); | ||
194 | LUA_API int (lua_setmetatable) (lua_State *L, int objindex); | ||
195 | LUA_API int (lua_setfenv) (lua_State *L, int idx); | ||
196 | |||
197 | |||
198 | /* | ||
199 | ** `load' and `call' functions (load and run Lua code) | ||
200 | */ | ||
201 | LUA_API void (lua_call) (lua_State *L, int nargs, int nresults); | ||
202 | LUA_API int (lua_pcall) (lua_State *L, int nargs, int nresults, int errfunc); | ||
203 | LUA_API int (lua_cpcall) (lua_State *L, lua_CFunction func, void *ud); | ||
204 | LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt, | ||
205 | const char *chunkname); | ||
206 | |||
207 | LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data); | ||
208 | |||
209 | |||
210 | /* | ||
211 | ** coroutine functions | ||
212 | */ | ||
213 | LUA_API int (lua_yield) (lua_State *L, int nresults); | ||
214 | LUA_API int (lua_resume) (lua_State *L, int narg); | ||
215 | LUA_API int (lua_status) (lua_State *L); | ||
216 | |||
217 | /* | ||
218 | ** garbage-collection function and options | ||
219 | */ | ||
220 | |||
221 | #define LUA_GCSTOP 0 | ||
222 | #define LUA_GCRESTART 1 | ||
223 | #define LUA_GCCOLLECT 2 | ||
224 | #define LUA_GCCOUNT 3 | ||
225 | #define LUA_GCCOUNTB 4 | ||
226 | #define LUA_GCSTEP 5 | ||
227 | #define LUA_GCSETPAUSE 6 | ||
228 | #define LUA_GCSETSTEPMUL 7 | ||
229 | |||
230 | LUA_API int (lua_gc) (lua_State *L, int what, int data); | ||
231 | |||
232 | |||
233 | /* | ||
234 | ** miscellaneous functions | ||
235 | */ | ||
236 | |||
237 | LUA_API int (lua_error) (lua_State *L); | ||
238 | |||
239 | LUA_API int (lua_next) (lua_State *L, int idx); | ||
240 | |||
241 | LUA_API void (lua_concat) (lua_State *L, int n); | ||
242 | |||
243 | LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud); | ||
244 | LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud); | ||
245 | |||
246 | |||
247 | |||
248 | /* | ||
249 | ** =============================================================== | ||
250 | ** some useful macros | ||
251 | ** =============================================================== | ||
252 | */ | ||
253 | |||
254 | #define lua_pop(L,n) lua_settop(L, -(n)-1) | ||
255 | |||
256 | #define lua_newtable(L) lua_createtable(L, 0, 0) | ||
257 | |||
258 | #define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n))) | ||
259 | |||
260 | #define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0) | ||
261 | |||
262 | #define lua_strlen(L,i) lua_objlen(L, (i)) | ||
263 | |||
264 | #define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION) | ||
265 | #define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE) | ||
266 | #define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA) | ||
267 | #define lua_isnil(L,n) (lua_type(L, (n)) == LUA_TNIL) | ||
268 | #define lua_isboolean(L,n) (lua_type(L, (n)) == LUA_TBOOLEAN) | ||
269 | #define lua_isthread(L,n) (lua_type(L, (n)) == LUA_TTHREAD) | ||
270 | #define lua_isnone(L,n) (lua_type(L, (n)) == LUA_TNONE) | ||
271 | #define lua_isnoneornil(L, n) (lua_type(L, (n)) <= 0) | ||
272 | |||
273 | #define lua_pushliteral(L, s) \ | ||
274 | lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1) | ||
275 | |||
276 | #define lua_setglobal(L,s) lua_setfield(L, LUA_GLOBALSINDEX, (s)) | ||
277 | #define lua_getglobal(L,s) lua_getfield(L, LUA_GLOBALSINDEX, (s)) | ||
278 | |||
279 | #define lua_tostring(L,i) lua_tolstring(L, (i), NULL) | ||
280 | |||
281 | |||
282 | |||
283 | /* | ||
284 | ** compatibility macros and functions | ||
285 | */ | ||
286 | |||
287 | #define lua_open() luaL_newstate() | ||
288 | |||
289 | #define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX) | ||
290 | |||
291 | #define lua_getgccount(L) lua_gc(L, LUA_GCCOUNT, 0) | ||
292 | |||
293 | #define lua_Chunkreader lua_Reader | ||
294 | #define lua_Chunkwriter lua_Writer | ||
295 | |||
296 | |||
297 | /* hack */ | ||
298 | LUA_API void lua_setlevel (lua_State *from, lua_State *to); | ||
299 | |||
300 | |||
301 | /* | ||
302 | ** {====================================================================== | ||
303 | ** Debug API | ||
304 | ** ======================================================================= | ||
305 | */ | ||
306 | |||
307 | |||
308 | /* | ||
309 | ** Event codes | ||
310 | */ | ||
311 | #define LUA_HOOKCALL 0 | ||
312 | #define LUA_HOOKRET 1 | ||
313 | #define LUA_HOOKLINE 2 | ||
314 | #define LUA_HOOKCOUNT 3 | ||
315 | #define LUA_HOOKTAILRET 4 | ||
316 | |||
317 | |||
318 | /* | ||
319 | ** Event masks | ||
320 | */ | ||
321 | #define LUA_MASKCALL (1 << LUA_HOOKCALL) | ||
322 | #define LUA_MASKRET (1 << LUA_HOOKRET) | ||
323 | #define LUA_MASKLINE (1 << LUA_HOOKLINE) | ||
324 | #define LUA_MASKCOUNT (1 << LUA_HOOKCOUNT) | ||
325 | |||
326 | typedef struct lua_Debug lua_Debug; /* activation record */ | ||
327 | |||
328 | |||
329 | /* Functions to be called by the debuger in specific events */ | ||
330 | typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar); | ||
331 | |||
332 | |||
333 | LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar); | ||
334 | LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar); | ||
335 | LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n); | ||
336 | LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n); | ||
337 | LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n); | ||
338 | LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n); | ||
339 | |||
340 | LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count); | ||
341 | LUA_API lua_Hook lua_gethook (lua_State *L); | ||
342 | LUA_API int lua_gethookmask (lua_State *L); | ||
343 | LUA_API int lua_gethookcount (lua_State *L); | ||
344 | |||
345 | |||
346 | struct lua_Debug { | ||
347 | int event; | ||
348 | const char *name; /* (n) */ | ||
349 | const char *namewhat; /* (n) `global', `local', `field', `method' */ | ||
350 | const char *what; /* (S) `Lua', `C', `main', `tail' */ | ||
351 | const char *source; /* (S) */ | ||
352 | int currentline; /* (l) */ | ||
353 | int nups; /* (u) number of upvalues */ | ||
354 | int linedefined; /* (S) */ | ||
355 | int lastlinedefined; /* (S) */ | ||
356 | char short_src[LUA_IDSIZE]; /* (S) */ | ||
357 | /* private part */ | ||
358 | int i_ci; /* active function */ | ||
359 | }; | ||
360 | |||
361 | /* }====================================================================== */ | ||
362 | |||
363 | |||
364 | /****************************************************************************** | ||
365 | * Copyright (C) 1994-2008 Lua.org, PUC-Rio. All rights reserved. | ||
366 | * | ||
367 | * Permission is hereby granted, free of charge, to any person obtaining | ||
368 | * a copy of this software and associated documentation files (the | ||
369 | * "Software"), to deal in the Software without restriction, including | ||
370 | * without limitation the rights to use, copy, modify, merge, publish, | ||
371 | * distribute, sublicense, and/or sell copies of the Software, and to | ||
372 | * permit persons to whom the Software is furnished to do so, subject to | ||
373 | * the following conditions: | ||
374 | * | ||
375 | * The above copyright notice and this permission notice shall be | ||
376 | * included in all copies or substantial portions of the Software. | ||
377 | * | ||
378 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
379 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
380 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | ||
381 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY | ||
382 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, | ||
383 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE | ||
384 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
385 | ******************************************************************************/ | ||
386 | |||
387 | |||
388 | #endif | ||
diff --git a/apps/plugins/lua/lua.make b/apps/plugins/lua/lua.make new file mode 100644 index 0000000000..6688f2d3d8 --- /dev/null +++ b/apps/plugins/lua/lua.make | |||
@@ -0,0 +1,46 @@ | |||
1 | # __________ __ ___. | ||
2 | # Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
3 | # Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
4 | # Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
5 | # Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
6 | # \/ \/ \/ \/ \/ | ||
7 | # $Id$ | ||
8 | # | ||
9 | |||
10 | LUA_SRCDIR := $(APPSDIR)/plugins/lua | ||
11 | LUA_BUILDDIR := $(BUILDDIR)/apps/plugins/lua | ||
12 | |||
13 | LUA_SRC := $(call preprocess, $(LUA_SRCDIR)/SOURCES) | ||
14 | LUA_OBJ := $(call c2obj, $(LUA_SRC)) | ||
15 | |||
16 | OTHER_SRC += $(LUA_SRC) | ||
17 | |||
18 | ifndef SIMVER | ||
19 | ifneq (,$(strip $(foreach tgt,RECORDER ONDIO,$(findstring $(tgt),$(TARGET))))) | ||
20 | ### lowmem targets | ||
21 | ROCKS += $(LUA_BUILDDIR)/lua.ovl | ||
22 | LUA_OUTLDS = $(LUA_BUILDDIR)/lua.link | ||
23 | LUA_OVLFLAGS = -T$(LUA_OUTLDS) -Wl,--gc-sections -Wl,-Map,$(basename $@).map | ||
24 | else | ||
25 | ### all other targets | ||
26 | ROCKS += $(LUA_BUILDDIR)/lua.rock | ||
27 | endif | ||
28 | else | ||
29 | ### simulator | ||
30 | ROCKS += $(LUA_BUILDDIR)/lua.rock | ||
31 | endif | ||
32 | |||
33 | $(LUA_BUILDDIR)/lua.rock: $(LUA_OBJ) | ||
34 | |||
35 | $(LUA_BUILDDIR)/lua.refmap: $(LUA_OBJ) | ||
36 | |||
37 | $(LUA_OUTLDS): $(PLUGIN_LDS) $(LUA_BUILDDIR)/lua.refmap | ||
38 | $(call PRINTS,PP $(@F))$(call preprocess2file,$<,$@,-DOVERLAY_OFFSET=$(shell \ | ||
39 | $(TOOLSDIR)/ovl_offset.pl $(LUA_BUILDDIR)/lua.refmap)) | ||
40 | |||
41 | $(LUA_BUILDDIR)/lua.ovl: $(LUA_OBJ) $(LUA_OUTLDS) | ||
42 | $(SILENT)$(CC) $(PLUGINFLAGS) -o $(basename $@).elf \ | ||
43 | $(filter %.o, $^) \ | ||
44 | $(filter %.a, $+) \ | ||
45 | -lgcc $(LUA_OVLFLAGS) | ||
46 | $(call PRINTS,LD $(@F))$(OC) -O binary $(basename $@).elf $@ | ||
diff --git a/apps/plugins/lua/luaconf.h b/apps/plugins/lua/luaconf.h new file mode 100644 index 0000000000..478ea14530 --- /dev/null +++ b/apps/plugins/lua/luaconf.h | |||
@@ -0,0 +1,763 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Configuration file for Lua | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #ifndef lconfig_h | ||
9 | #define lconfig_h | ||
10 | |||
11 | #include <limits.h> | ||
12 | #include <stddef.h> | ||
13 | |||
14 | |||
15 | /* | ||
16 | ** ================================================================== | ||
17 | ** Search for "@@" to find all configurable definitions. | ||
18 | ** =================================================================== | ||
19 | */ | ||
20 | |||
21 | |||
22 | /* | ||
23 | @@ LUA_ANSI controls the use of non-ansi features. | ||
24 | ** CHANGE it (define it) if you want Lua to avoid the use of any | ||
25 | ** non-ansi feature or library. | ||
26 | */ | ||
27 | #if defined(__STRICT_ANSI__) | ||
28 | #define LUA_ANSI | ||
29 | #endif | ||
30 | |||
31 | |||
32 | #if !defined(LUA_ANSI) && defined(_WIN32) | ||
33 | #define LUA_WIN | ||
34 | #endif | ||
35 | |||
36 | #if defined(LUA_USE_LINUX) | ||
37 | #define LUA_USE_POSIX | ||
38 | #define LUA_USE_DLOPEN /* needs an extra library: -ldl */ | ||
39 | #define LUA_USE_READLINE /* needs some extra libraries */ | ||
40 | #endif | ||
41 | |||
42 | #if defined(LUA_USE_MACOSX) | ||
43 | #define LUA_USE_POSIX | ||
44 | #define LUA_DL_DYLD /* does not need extra library */ | ||
45 | #endif | ||
46 | |||
47 | |||
48 | |||
49 | /* | ||
50 | @@ LUA_USE_POSIX includes all functionallity listed as X/Open System | ||
51 | @* Interfaces Extension (XSI). | ||
52 | ** CHANGE it (define it) if your system is XSI compatible. | ||
53 | */ | ||
54 | #if defined(LUA_USE_POSIX) | ||
55 | #define LUA_USE_MKSTEMP | ||
56 | #define LUA_USE_ISATTY | ||
57 | #define LUA_USE_POPEN | ||
58 | #define LUA_USE_ULONGJMP | ||
59 | #endif | ||
60 | |||
61 | |||
62 | /* | ||
63 | @@ LUA_PATH and LUA_CPATH are the names of the environment variables that | ||
64 | @* Lua check to set its paths. | ||
65 | @@ LUA_INIT is the name of the environment variable that Lua | ||
66 | @* checks for initialization code. | ||
67 | ** CHANGE them if you want different names. | ||
68 | */ | ||
69 | #define LUA_PATH "LUA_PATH" | ||
70 | #define LUA_CPATH "LUA_CPATH" | ||
71 | #define LUA_INIT "LUA_INIT" | ||
72 | |||
73 | |||
74 | /* | ||
75 | @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for | ||
76 | @* Lua libraries. | ||
77 | @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for | ||
78 | @* C libraries. | ||
79 | ** CHANGE them if your machine has a non-conventional directory | ||
80 | ** hierarchy or if you want to install your libraries in | ||
81 | ** non-conventional directories. | ||
82 | */ | ||
83 | #if defined(_WIN32) | ||
84 | /* | ||
85 | ** In Windows, any exclamation mark ('!') in the path is replaced by the | ||
86 | ** path of the directory of the executable file of the current process. | ||
87 | */ | ||
88 | #define LUA_LDIR "!\\lua\\" | ||
89 | #define LUA_CDIR "!\\" | ||
90 | #define LUA_PATH_DEFAULT \ | ||
91 | ".\\?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ | ||
92 | LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua" | ||
93 | #define LUA_CPATH_DEFAULT \ | ||
94 | ".\\?.dll;" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll" | ||
95 | |||
96 | #else | ||
97 | #define LUA_ROOT "/usr/local/" | ||
98 | #define LUA_LDIR LUA_ROOT "share/lua/5.1/" | ||
99 | #define LUA_CDIR LUA_ROOT "lib/lua/5.1/" | ||
100 | #define LUA_PATH_DEFAULT \ | ||
101 | "./?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ | ||
102 | LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua" | ||
103 | #define LUA_CPATH_DEFAULT \ | ||
104 | "./?.so;" LUA_CDIR"?.so;" LUA_CDIR"loadall.so" | ||
105 | #endif | ||
106 | |||
107 | |||
108 | /* | ||
109 | @@ LUA_DIRSEP is the directory separator (for submodules). | ||
110 | ** CHANGE it if your machine does not use "/" as the directory separator | ||
111 | ** and is not Windows. (On Windows Lua automatically uses "\".) | ||
112 | */ | ||
113 | #if defined(_WIN32) | ||
114 | #define LUA_DIRSEP "\\" | ||
115 | #else | ||
116 | #define LUA_DIRSEP "/" | ||
117 | #endif | ||
118 | |||
119 | |||
120 | /* | ||
121 | @@ LUA_PATHSEP is the character that separates templates in a path. | ||
122 | @@ LUA_PATH_MARK is the string that marks the substitution points in a | ||
123 | @* template. | ||
124 | @@ LUA_EXECDIR in a Windows path is replaced by the executable's | ||
125 | @* directory. | ||
126 | @@ LUA_IGMARK is a mark to ignore all before it when bulding the | ||
127 | @* luaopen_ function name. | ||
128 | ** CHANGE them if for some reason your system cannot use those | ||
129 | ** characters. (E.g., if one of those characters is a common character | ||
130 | ** in file/directory names.) Probably you do not need to change them. | ||
131 | */ | ||
132 | #define LUA_PATHSEP ";" | ||
133 | #define LUA_PATH_MARK "?" | ||
134 | #define LUA_EXECDIR "!" | ||
135 | #define LUA_IGMARK "-" | ||
136 | |||
137 | |||
138 | /* | ||
139 | @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger. | ||
140 | ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most | ||
141 | ** machines, ptrdiff_t gives a good choice between int or long.) | ||
142 | */ | ||
143 | #define LUA_INTEGER ptrdiff_t | ||
144 | |||
145 | |||
146 | /* | ||
147 | @@ LUA_API is a mark for all core API functions. | ||
148 | @@ LUALIB_API is a mark for all standard library functions. | ||
149 | ** CHANGE them if you need to define those functions in some special way. | ||
150 | ** For instance, if you want to create one Windows DLL with the core and | ||
151 | ** the libraries, you may want to use the following definition (define | ||
152 | ** LUA_BUILD_AS_DLL to get it). | ||
153 | */ | ||
154 | #if defined(LUA_BUILD_AS_DLL) | ||
155 | |||
156 | #if defined(LUA_CORE) || defined(LUA_LIB) | ||
157 | #define LUA_API __declspec(dllexport) | ||
158 | #else | ||
159 | #define LUA_API __declspec(dllimport) | ||
160 | #endif | ||
161 | |||
162 | #else | ||
163 | |||
164 | #define LUA_API extern | ||
165 | |||
166 | #endif | ||
167 | |||
168 | /* more often than not the libs go together with the core */ | ||
169 | #define LUALIB_API LUA_API | ||
170 | |||
171 | |||
172 | /* | ||
173 | @@ LUAI_FUNC is a mark for all extern functions that are not to be | ||
174 | @* exported to outside modules. | ||
175 | @@ LUAI_DATA is a mark for all extern (const) variables that are not to | ||
176 | @* be exported to outside modules. | ||
177 | ** CHANGE them if you need to mark them in some special way. Elf/gcc | ||
178 | ** (versions 3.2 and later) mark them as "hidden" to optimize access | ||
179 | ** when Lua is compiled as a shared library. | ||
180 | */ | ||
181 | #if defined(luaall_c) | ||
182 | #define LUAI_FUNC static | ||
183 | #define LUAI_DATA /* empty */ | ||
184 | |||
185 | #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \ | ||
186 | defined(__ELF__) | ||
187 | #define LUAI_FUNC __attribute__((visibility("hidden"))) extern | ||
188 | #define LUAI_DATA LUAI_FUNC | ||
189 | |||
190 | #else | ||
191 | #define LUAI_FUNC extern | ||
192 | #define LUAI_DATA extern | ||
193 | #endif | ||
194 | |||
195 | |||
196 | |||
197 | /* | ||
198 | @@ LUA_QL describes how error messages quote program elements. | ||
199 | ** CHANGE it if you want a different appearance. | ||
200 | */ | ||
201 | #define LUA_QL(x) "'" x "'" | ||
202 | #define LUA_QS LUA_QL("%s") | ||
203 | |||
204 | |||
205 | /* | ||
206 | @@ LUA_IDSIZE gives the maximum size for the description of the source | ||
207 | @* of a function in debug information. | ||
208 | ** CHANGE it if you want a different size. | ||
209 | */ | ||
210 | #define LUA_IDSIZE 60 | ||
211 | |||
212 | |||
213 | /* | ||
214 | ** {================================================================== | ||
215 | ** Stand-alone configuration | ||
216 | ** =================================================================== | ||
217 | */ | ||
218 | |||
219 | #if defined(lua_c) || defined(luaall_c) | ||
220 | |||
221 | /* | ||
222 | @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that | ||
223 | @* is, whether we're running lua interactively). | ||
224 | ** CHANGE it if you have a better definition for non-POSIX/non-Windows | ||
225 | ** systems. | ||
226 | */ | ||
227 | #if defined(LUA_USE_ISATTY) | ||
228 | #include <unistd.h> | ||
229 | #define lua_stdin_is_tty() isatty(0) | ||
230 | #elif defined(LUA_WIN) | ||
231 | #include <io.h> | ||
232 | #include <stdio.h> | ||
233 | #define lua_stdin_is_tty() _isatty(_fileno(stdin)) | ||
234 | #else | ||
235 | #define lua_stdin_is_tty() 1 /* assume stdin is a tty */ | ||
236 | #endif | ||
237 | |||
238 | |||
239 | /* | ||
240 | @@ LUA_PROMPT is the default prompt used by stand-alone Lua. | ||
241 | @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua. | ||
242 | ** CHANGE them if you want different prompts. (You can also change the | ||
243 | ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.) | ||
244 | */ | ||
245 | #define LUA_PROMPT "> " | ||
246 | #define LUA_PROMPT2 ">> " | ||
247 | |||
248 | |||
249 | /* | ||
250 | @@ LUA_PROGNAME is the default name for the stand-alone Lua program. | ||
251 | ** CHANGE it if your stand-alone interpreter has a different name and | ||
252 | ** your system is not able to detect that name automatically. | ||
253 | */ | ||
254 | #define LUA_PROGNAME "lua" | ||
255 | |||
256 | |||
257 | /* | ||
258 | @@ LUA_MAXINPUT is the maximum length for an input line in the | ||
259 | @* stand-alone interpreter. | ||
260 | ** CHANGE it if you need longer lines. | ||
261 | */ | ||
262 | #define LUA_MAXINPUT 512 | ||
263 | |||
264 | |||
265 | /* | ||
266 | @@ lua_readline defines how to show a prompt and then read a line from | ||
267 | @* the standard input. | ||
268 | @@ lua_saveline defines how to "save" a read line in a "history". | ||
269 | @@ lua_freeline defines how to free a line read by lua_readline. | ||
270 | ** CHANGE them if you want to improve this functionality (e.g., by using | ||
271 | ** GNU readline and history facilities). | ||
272 | */ | ||
273 | #if defined(LUA_USE_READLINE) | ||
274 | #include <stdio.h> | ||
275 | #include <readline/readline.h> | ||
276 | #include <readline/history.h> | ||
277 | #define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL) | ||
278 | #define lua_saveline(L,idx) \ | ||
279 | if (lua_strlen(L,idx) > 0) /* non-empty line? */ \ | ||
280 | add_history(lua_tostring(L, idx)); /* add it to history */ | ||
281 | #define lua_freeline(L,b) ((void)L, free(b)) | ||
282 | #else | ||
283 | #define lua_readline(L,b,p) \ | ||
284 | ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \ | ||
285 | fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */ | ||
286 | #define lua_saveline(L,idx) { (void)L; (void)idx; } | ||
287 | #define lua_freeline(L,b) { (void)L; (void)b; } | ||
288 | #endif | ||
289 | |||
290 | #endif | ||
291 | |||
292 | /* }================================================================== */ | ||
293 | |||
294 | |||
295 | /* | ||
296 | @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles | ||
297 | @* as a percentage. | ||
298 | ** CHANGE it if you want the GC to run faster or slower (higher values | ||
299 | ** mean larger pauses which mean slower collection.) You can also change | ||
300 | ** this value dynamically. | ||
301 | */ | ||
302 | #define LUAI_GCPAUSE 200 /* 200% (wait memory to double before next GC) */ | ||
303 | |||
304 | |||
305 | /* | ||
306 | @@ LUAI_GCMUL defines the default speed of garbage collection relative to | ||
307 | @* memory allocation as a percentage. | ||
308 | ** CHANGE it if you want to change the granularity of the garbage | ||
309 | ** collection. (Higher values mean coarser collections. 0 represents | ||
310 | ** infinity, where each step performs a full collection.) You can also | ||
311 | ** change this value dynamically. | ||
312 | */ | ||
313 | #define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */ | ||
314 | |||
315 | |||
316 | |||
317 | /* | ||
318 | @@ LUA_COMPAT_GETN controls compatibility with old getn behavior. | ||
319 | ** CHANGE it (define it) if you want exact compatibility with the | ||
320 | ** behavior of setn/getn in Lua 5.0. | ||
321 | */ | ||
322 | #undef LUA_COMPAT_GETN | ||
323 | |||
324 | /* | ||
325 | @@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib. | ||
326 | ** CHANGE it to undefined as soon as you do not need a global 'loadlib' | ||
327 | ** function (the function is still available as 'package.loadlib'). | ||
328 | */ | ||
329 | #undef LUA_COMPAT_LOADLIB | ||
330 | |||
331 | /* | ||
332 | @@ LUA_COMPAT_VARARG controls compatibility with old vararg feature. | ||
333 | ** CHANGE it to undefined as soon as your programs use only '...' to | ||
334 | ** access vararg parameters (instead of the old 'arg' table). | ||
335 | */ | ||
336 | #undef LUA_COMPAT_VARARG | ||
337 | |||
338 | /* | ||
339 | @@ LUA_COMPAT_MOD controls compatibility with old math.mod function. | ||
340 | ** CHANGE it to undefined as soon as your programs use 'math.fmod' or | ||
341 | ** the new '%' operator instead of 'math.mod'. | ||
342 | */ | ||
343 | #undef LUA_COMPAT_MOD | ||
344 | |||
345 | /* | ||
346 | @@ LUA_COMPAT_LSTR controls compatibility with old long string nesting | ||
347 | @* facility. | ||
348 | ** CHANGE it to 2 if you want the old behaviour, or undefine it to turn | ||
349 | ** off the advisory error when nesting [[...]]. | ||
350 | */ | ||
351 | #undef LUA_COMPAT_LSTR | ||
352 | |||
353 | /* | ||
354 | @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name. | ||
355 | ** CHANGE it to undefined as soon as you rename 'string.gfind' to | ||
356 | ** 'string.gmatch'. | ||
357 | */ | ||
358 | #undef LUA_COMPAT_GFIND | ||
359 | |||
360 | /* | ||
361 | @@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib' | ||
362 | @* behavior. | ||
363 | ** CHANGE it to undefined as soon as you replace to 'luaL_registry' | ||
364 | ** your uses of 'luaL_openlib' | ||
365 | */ | ||
366 | #undef LUA_COMPAT_OPENLIB | ||
367 | |||
368 | |||
369 | |||
370 | /* | ||
371 | @@ luai_apicheck is the assert macro used by the Lua-C API. | ||
372 | ** CHANGE luai_apicheck if you want Lua to perform some checks in the | ||
373 | ** parameters it gets from API calls. This may slow down the interpreter | ||
374 | ** a bit, but may be quite useful when debugging C code that interfaces | ||
375 | ** with Lua. A useful redefinition is to use assert.h. | ||
376 | */ | ||
377 | #if defined(LUA_USE_APICHECK) | ||
378 | #include <assert.h> | ||
379 | #define luai_apicheck(L,o) { (void)L; assert(o); } | ||
380 | #else | ||
381 | #define luai_apicheck(L,o) { (void)L; } | ||
382 | #endif | ||
383 | |||
384 | |||
385 | /* | ||
386 | @@ LUAI_BITSINT defines the number of bits in an int. | ||
387 | ** CHANGE here if Lua cannot automatically detect the number of bits of | ||
388 | ** your machine. Probably you do not need to change this. | ||
389 | */ | ||
390 | /* avoid overflows in comparison */ | ||
391 | #if INT_MAX-20 < 32760 | ||
392 | #define LUAI_BITSINT 16 | ||
393 | #elif INT_MAX > 2147483640L | ||
394 | /* int has at least 32 bits */ | ||
395 | #define LUAI_BITSINT 32 | ||
396 | #else | ||
397 | #error "you must define LUA_BITSINT with number of bits in an integer" | ||
398 | #endif | ||
399 | |||
400 | |||
401 | /* | ||
402 | @@ LUAI_UINT32 is an unsigned integer with at least 32 bits. | ||
403 | @@ LUAI_INT32 is an signed integer with at least 32 bits. | ||
404 | @@ LUAI_UMEM is an unsigned integer big enough to count the total | ||
405 | @* memory used by Lua. | ||
406 | @@ LUAI_MEM is a signed integer big enough to count the total memory | ||
407 | @* used by Lua. | ||
408 | ** CHANGE here if for some weird reason the default definitions are not | ||
409 | ** good enough for your machine. (The definitions in the 'else' | ||
410 | ** part always works, but may waste space on machines with 64-bit | ||
411 | ** longs.) Probably you do not need to change this. | ||
412 | */ | ||
413 | #if LUAI_BITSINT >= 32 | ||
414 | #define LUAI_UINT32 unsigned int | ||
415 | #define LUAI_INT32 int | ||
416 | #define LUAI_MAXINT32 INT_MAX | ||
417 | #define LUAI_UMEM size_t | ||
418 | #define LUAI_MEM ptrdiff_t | ||
419 | #else | ||
420 | /* 16-bit ints */ | ||
421 | #define LUAI_UINT32 unsigned long | ||
422 | #define LUAI_INT32 long | ||
423 | #define LUAI_MAXINT32 LONG_MAX | ||
424 | #define LUAI_UMEM unsigned long | ||
425 | #define LUAI_MEM long | ||
426 | #endif | ||
427 | |||
428 | |||
429 | /* | ||
430 | @@ LUAI_MAXCALLS limits the number of nested calls. | ||
431 | ** CHANGE it if you need really deep recursive calls. This limit is | ||
432 | ** arbitrary; its only purpose is to stop infinite recursion before | ||
433 | ** exhausting memory. | ||
434 | */ | ||
435 | #define LUAI_MAXCALLS 20000 | ||
436 | |||
437 | |||
438 | /* | ||
439 | @@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function | ||
440 | @* can use. | ||
441 | ** CHANGE it if you need lots of (Lua) stack space for your C | ||
442 | ** functions. This limit is arbitrary; its only purpose is to stop C | ||
443 | ** functions to consume unlimited stack space. (must be smaller than | ||
444 | ** -LUA_REGISTRYINDEX) | ||
445 | */ | ||
446 | #define LUAI_MAXCSTACK 8000 | ||
447 | |||
448 | |||
449 | |||
450 | /* | ||
451 | ** {================================================================== | ||
452 | ** CHANGE (to smaller values) the following definitions if your system | ||
453 | ** has a small C stack. (Or you may want to change them to larger | ||
454 | ** values if your system has a large C stack and these limits are | ||
455 | ** too rigid for you.) Some of these constants control the size of | ||
456 | ** stack-allocated arrays used by the compiler or the interpreter, while | ||
457 | ** others limit the maximum number of recursive calls that the compiler | ||
458 | ** or the interpreter can perform. Values too large may cause a C stack | ||
459 | ** overflow for some forms of deep constructs. | ||
460 | ** =================================================================== | ||
461 | */ | ||
462 | |||
463 | |||
464 | /* | ||
465 | @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and | ||
466 | @* syntactical nested non-terminals in a program. | ||
467 | */ | ||
468 | #define LUAI_MAXCCALLS 200 | ||
469 | |||
470 | |||
471 | /* | ||
472 | @@ LUAI_MAXVARS is the maximum number of local variables per function | ||
473 | @* (must be smaller than 250). | ||
474 | */ | ||
475 | #define LUAI_MAXVARS 200 | ||
476 | |||
477 | |||
478 | /* | ||
479 | @@ LUAI_MAXUPVALUES is the maximum number of upvalues per function | ||
480 | @* (must be smaller than 250). | ||
481 | */ | ||
482 | #define LUAI_MAXUPVALUES 60 | ||
483 | |||
484 | |||
485 | /* | ||
486 | @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. | ||
487 | */ | ||
488 | #define LUAL_BUFFERSIZE 1024 | ||
489 | |||
490 | /* }================================================================== */ | ||
491 | |||
492 | |||
493 | |||
494 | |||
495 | /* | ||
496 | ** {================================================================== | ||
497 | @@ LUA_NUMBER is the type of numbers in Lua. | ||
498 | ** CHANGE the following definitions only if you want to build Lua | ||
499 | ** with a number type different from double. You may also need to | ||
500 | ** change lua_number2int & lua_number2integer. | ||
501 | ** =================================================================== | ||
502 | */ | ||
503 | |||
504 | #undef LUA_NUMBER_DOUBLE | ||
505 | #define LUA_NUMBER long | ||
506 | |||
507 | /* | ||
508 | @@ LUAI_UACNUMBER is the result of an 'usual argument conversion' | ||
509 | @* over a number. | ||
510 | */ | ||
511 | #define LUAI_UACNUMBER long | ||
512 | |||
513 | |||
514 | /* | ||
515 | @@ LUA_NUMBER_SCAN is the format for reading numbers. | ||
516 | @@ LUA_NUMBER_FMT is the format for writing numbers. | ||
517 | @@ lua_number2str converts a number to a string. | ||
518 | @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion. | ||
519 | @@ lua_str2number converts a string to a number. | ||
520 | */ | ||
521 | #define LUA_NUMBER_SCAN "%ld" | ||
522 | #define LUA_NUMBER_FMT "%ld" | ||
523 | #define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */ | ||
524 | #define lua_number2str(s,n) snprintf((s), 32, LUA_NUMBER_FMT, (n)) | ||
525 | #define lua_str2number(s,p) strtol((s), (p), 10) | ||
526 | |||
527 | |||
528 | /* | ||
529 | @@ The luai_num* macros define the primitive operations over numbers. | ||
530 | */ | ||
531 | #if defined(LUA_CORE) | ||
532 | #include <math.h> | ||
533 | #define luai_numadd(a,b) ((a)+(b)) | ||
534 | #define luai_numsub(a,b) ((a)-(b)) | ||
535 | #define luai_nummul(a,b) ((a)*(b)) | ||
536 | #define luai_numdiv(a,b) ((a)/(b)) | ||
537 | #define luai_nummod(a,b) ((a) - floor((a)/(b))*(b)) | ||
538 | #define luai_numpow(a,b) (pow(a,b)) | ||
539 | #define luai_numunm(a) (-(a)) | ||
540 | #define luai_numeq(a,b) ((a)==(b)) | ||
541 | #define luai_numlt(a,b) ((a)<(b)) | ||
542 | #define luai_numle(a,b) ((a)<=(b)) | ||
543 | #define luai_numisnan(a) (!luai_numeq((a), (a))) | ||
544 | #endif | ||
545 | |||
546 | |||
547 | /* | ||
548 | @@ lua_number2int is a macro to convert lua_Number to int. | ||
549 | @@ lua_number2integer is a macro to convert lua_Number to lua_Integer. | ||
550 | ** CHANGE them if you know a faster way to convert a lua_Number to | ||
551 | ** int (with any rounding method and without throwing errors) in your | ||
552 | ** system. In Pentium machines, a naive typecast from double to int | ||
553 | ** in C is extremely slow, so any alternative is worth trying. | ||
554 | */ | ||
555 | |||
556 | /* On a Pentium, resort to a trick */ | ||
557 | #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \ | ||
558 | (defined(__i386) || defined (_M_IX86) || defined(__i386__)) | ||
559 | |||
560 | /* On a Microsoft compiler, use assembler */ | ||
561 | #if defined(_MSC_VER) | ||
562 | |||
563 | #define lua_number2int(i,d) __asm fld d __asm fistp i | ||
564 | #define lua_number2integer(i,n) lua_number2int(i, n) | ||
565 | |||
566 | /* the next trick should work on any Pentium, but sometimes clashes | ||
567 | with a DirectX idiosyncrasy */ | ||
568 | #else | ||
569 | |||
570 | union luai_Cast { double l_d; long l_l; }; | ||
571 | #define lua_number2int(i,d) \ | ||
572 | { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; } | ||
573 | #define lua_number2integer(i,n) lua_number2int(i, n) | ||
574 | |||
575 | #endif | ||
576 | |||
577 | |||
578 | /* this option always works, but may be slow */ | ||
579 | #else | ||
580 | #define lua_number2int(i,d) ((i)=(int)(d)) | ||
581 | #define lua_number2integer(i,d) ((i)=(lua_Integer)(d)) | ||
582 | |||
583 | #endif | ||
584 | |||
585 | /* }================================================================== */ | ||
586 | |||
587 | |||
588 | /* | ||
589 | @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment. | ||
590 | ** CHANGE it if your system requires alignments larger than double. (For | ||
591 | ** instance, if your system supports long doubles and they must be | ||
592 | ** aligned in 16-byte boundaries, then you should add long double in the | ||
593 | ** union.) Probably you do not need to change this. | ||
594 | */ | ||
595 | #define LUAI_USER_ALIGNMENT_T union { void *s; long l; } | ||
596 | |||
597 | |||
598 | /* | ||
599 | @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling. | ||
600 | ** CHANGE them if you prefer to use longjmp/setjmp even with C++ | ||
601 | ** or if want/don't to use _longjmp/_setjmp instead of regular | ||
602 | ** longjmp/setjmp. By default, Lua handles errors with exceptions when | ||
603 | ** compiling as C++ code, with _longjmp/_setjmp when asked to use them, | ||
604 | ** and with longjmp/setjmp otherwise. | ||
605 | */ | ||
606 | #if defined(__cplusplus) | ||
607 | /* C++ exceptions */ | ||
608 | #define LUAI_THROW(L,c) throw(c) | ||
609 | #define LUAI_TRY(L,c,a) try { a } catch(...) \ | ||
610 | { if ((c)->status == 0) (c)->status = -1; } | ||
611 | #define luai_jmpbuf int /* dummy variable */ | ||
612 | |||
613 | #elif defined(LUA_USE_ULONGJMP) | ||
614 | /* in Unix, try _longjmp/_setjmp (more efficient) */ | ||
615 | #define LUAI_THROW(L,c) _longjmp((c)->b, 1) | ||
616 | #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a } | ||
617 | #define luai_jmpbuf jmp_buf | ||
618 | |||
619 | #else | ||
620 | /* default handling with long jumps */ | ||
621 | #define LUAI_THROW(L,c) longjmp((c)->b, 1) | ||
622 | #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a } | ||
623 | #define luai_jmpbuf jmp_buf | ||
624 | |||
625 | #endif | ||
626 | |||
627 | |||
628 | /* | ||
629 | @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern | ||
630 | @* can do during pattern-matching. | ||
631 | ** CHANGE it if you need more captures. This limit is arbitrary. | ||
632 | */ | ||
633 | #define LUA_MAXCAPTURES 32 | ||
634 | |||
635 | |||
636 | /* | ||
637 | @@ lua_tmpnam is the function that the OS library uses to create a | ||
638 | @* temporary name. | ||
639 | @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam. | ||
640 | ** CHANGE them if you have an alternative to tmpnam (which is considered | ||
641 | ** insecure) or if you want the original tmpnam anyway. By default, Lua | ||
642 | ** uses tmpnam except when POSIX is available, where it uses mkstemp. | ||
643 | */ | ||
644 | #if defined(loslib_c) || defined(luaall_c) | ||
645 | |||
646 | #if defined(LUA_USE_MKSTEMP) | ||
647 | #include <unistd.h> | ||
648 | #define LUA_TMPNAMBUFSIZE 32 | ||
649 | #define lua_tmpnam(b,e) { \ | ||
650 | strcpy(b, "/tmp/lua_XXXXXX"); \ | ||
651 | e = mkstemp(b); \ | ||
652 | if (e != -1) close(e); \ | ||
653 | e = (e == -1); } | ||
654 | |||
655 | #else | ||
656 | #define LUA_TMPNAMBUFSIZE L_tmpnam | ||
657 | #define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); } | ||
658 | #endif | ||
659 | |||
660 | #endif | ||
661 | |||
662 | |||
663 | /* | ||
664 | @@ lua_popen spawns a new process connected to the current one through | ||
665 | @* the file streams. | ||
666 | ** CHANGE it if you have a way to implement it in your system. | ||
667 | */ | ||
668 | #if defined(LUA_USE_POPEN) | ||
669 | |||
670 | #define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m)) | ||
671 | #define lua_pclose(L,file) ((void)L, (pclose(file) != -1)) | ||
672 | |||
673 | #elif defined(LUA_WIN) | ||
674 | |||
675 | #define lua_popen(L,c,m) ((void)L, _popen(c,m)) | ||
676 | #define lua_pclose(L,file) ((void)L, (_pclose(file) != -1)) | ||
677 | |||
678 | #else | ||
679 | |||
680 | #define lua_popen(L,c,m) ((void)((void)c, m), \ | ||
681 | luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0) | ||
682 | #define lua_pclose(L,file) ((void)((void)L, file), 0) | ||
683 | |||
684 | #endif | ||
685 | |||
686 | /* | ||
687 | @@ LUA_DL_* define which dynamic-library system Lua should use. | ||
688 | ** CHANGE here if Lua has problems choosing the appropriate | ||
689 | ** dynamic-library system for your platform (either Windows' DLL, Mac's | ||
690 | ** dyld, or Unix's dlopen). If your system is some kind of Unix, there | ||
691 | ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for | ||
692 | ** it. To use dlopen you also need to adapt the src/Makefile (probably | ||
693 | ** adding -ldl to the linker options), so Lua does not select it | ||
694 | ** automatically. (When you change the makefile to add -ldl, you must | ||
695 | ** also add -DLUA_USE_DLOPEN.) | ||
696 | ** If you do not want any kind of dynamic library, undefine all these | ||
697 | ** options. | ||
698 | ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD. | ||
699 | */ | ||
700 | #if defined(LUA_USE_DLOPEN) | ||
701 | #define LUA_DL_DLOPEN | ||
702 | #endif | ||
703 | |||
704 | #if defined(LUA_WIN) | ||
705 | #define LUA_DL_DLL | ||
706 | #endif | ||
707 | |||
708 | |||
709 | /* | ||
710 | @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State | ||
711 | @* (the data goes just *before* the lua_State pointer). | ||
712 | ** CHANGE (define) this if you really need that. This value must be | ||
713 | ** a multiple of the maximum alignment required for your machine. | ||
714 | */ | ||
715 | #define LUAI_EXTRASPACE 0 | ||
716 | |||
717 | |||
718 | /* | ||
719 | @@ luai_userstate* allow user-specific actions on threads. | ||
720 | ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something | ||
721 | ** extra when a thread is created/deleted/resumed/yielded. | ||
722 | */ | ||
723 | #define luai_userstateopen(L) ((void)L) | ||
724 | #define luai_userstateclose(L) ((void)L) | ||
725 | #define luai_userstatethread(L,L1) ((void)L) | ||
726 | #define luai_userstatefree(L) ((void)L) | ||
727 | #define luai_userstateresume(L,n) ((void)L) | ||
728 | #define luai_userstateyield(L,n) ((void)L) | ||
729 | |||
730 | |||
731 | /* | ||
732 | @@ LUA_INTFRMLEN is the length modifier for integer conversions | ||
733 | @* in 'string.format'. | ||
734 | @@ LUA_INTFRM_T is the integer type correspoding to the previous length | ||
735 | @* modifier. | ||
736 | ** CHANGE them if your system supports long long or does not support long. | ||
737 | */ | ||
738 | |||
739 | #if defined(LUA_USELONGLONG) | ||
740 | |||
741 | #define LUA_INTFRMLEN "ll" | ||
742 | #define LUA_INTFRM_T long long | ||
743 | |||
744 | #else | ||
745 | |||
746 | #define LUA_INTFRMLEN "l" | ||
747 | #define LUA_INTFRM_T long | ||
748 | |||
749 | #endif | ||
750 | |||
751 | |||
752 | |||
753 | /* =================================================================== */ | ||
754 | |||
755 | /* | ||
756 | ** Local configuration. You can use this space to add your redefinitions | ||
757 | ** without modifying the main part of the file. | ||
758 | */ | ||
759 | |||
760 | #include "rockconf.h" | ||
761 | |||
762 | #endif | ||
763 | |||
diff --git a/apps/plugins/lua/lualib.h b/apps/plugins/lua/lualib.h new file mode 100644 index 0000000000..33d4e314c2 --- /dev/null +++ b/apps/plugins/lua/lualib.h | |||
@@ -0,0 +1,53 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Lua standard libraries | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #ifndef lualib_h | ||
9 | #define lualib_h | ||
10 | |||
11 | #include "lua.h" | ||
12 | |||
13 | |||
14 | /* Key to file-handle type */ | ||
15 | #define LUA_FILEHANDLE "FILE*" | ||
16 | |||
17 | |||
18 | #define LUA_COLIBNAME "coroutine" | ||
19 | LUALIB_API int (luaopen_base) (lua_State *L); | ||
20 | |||
21 | #define LUA_TABLIBNAME "table" | ||
22 | LUALIB_API int (luaopen_table) (lua_State *L); | ||
23 | |||
24 | #define LUA_IOLIBNAME "io" | ||
25 | LUALIB_API int (luaopen_io) (lua_State *L); | ||
26 | |||
27 | #define LUA_OSLIBNAME "os" | ||
28 | LUALIB_API int (luaopen_os) (lua_State *L); | ||
29 | |||
30 | #define LUA_STRLIBNAME "string" | ||
31 | LUALIB_API int (luaopen_string) (lua_State *L); | ||
32 | |||
33 | #define LUA_MATHLIBNAME "math" | ||
34 | LUALIB_API int (luaopen_math) (lua_State *L); | ||
35 | |||
36 | #define LUA_DBLIBNAME "debug" | ||
37 | LUALIB_API int (luaopen_debug) (lua_State *L); | ||
38 | |||
39 | #define LUA_LOADLIBNAME "package" | ||
40 | LUALIB_API int (luaopen_package) (lua_State *L); | ||
41 | |||
42 | |||
43 | /* open all previous libraries */ | ||
44 | LUALIB_API void (luaL_openlibs) (lua_State *L); | ||
45 | |||
46 | |||
47 | |||
48 | #ifndef lua_assert | ||
49 | #define lua_assert(x) ((void)0) | ||
50 | #endif | ||
51 | |||
52 | |||
53 | #endif | ||
diff --git a/apps/plugins/lua/lundump.c b/apps/plugins/lua/lundump.c new file mode 100644 index 0000000000..8010a45795 --- /dev/null +++ b/apps/plugins/lua/lundump.c | |||
@@ -0,0 +1,227 @@ | |||
1 | /* | ||
2 | ** $Id: lundump.c,v 2.7.1.4 2008/04/04 19:51:41 roberto Exp $ | ||
3 | ** load precompiled Lua chunks | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #include <string.h> | ||
8 | |||
9 | #define lundump_c | ||
10 | #define LUA_CORE | ||
11 | |||
12 | #include "lua.h" | ||
13 | |||
14 | #include "ldebug.h" | ||
15 | #include "ldo.h" | ||
16 | #include "lfunc.h" | ||
17 | #include "lmem.h" | ||
18 | #include "lobject.h" | ||
19 | #include "lstring.h" | ||
20 | #include "lundump.h" | ||
21 | #include "lzio.h" | ||
22 | |||
23 | typedef struct { | ||
24 | lua_State* L; | ||
25 | ZIO* Z; | ||
26 | Mbuffer* b; | ||
27 | const char* name; | ||
28 | } LoadState; | ||
29 | |||
30 | #ifdef LUAC_TRUST_BINARIES | ||
31 | #define IF(c,s) | ||
32 | #define error(S,s) | ||
33 | #else | ||
34 | #define IF(c,s) if (c) error(S,s) | ||
35 | |||
36 | static void error(LoadState* S, const char* why) | ||
37 | { | ||
38 | luaO_pushfstring(S->L,"%s: %s in precompiled chunk",S->name,why); | ||
39 | luaD_throw(S->L,LUA_ERRSYNTAX); | ||
40 | } | ||
41 | #endif | ||
42 | |||
43 | #define LoadMem(S,b,n,size) LoadBlock(S,b,(n)*(size)) | ||
44 | #define LoadByte(S) (lu_byte)LoadChar(S) | ||
45 | #define LoadVar(S,x) LoadMem(S,&x,1,sizeof(x)) | ||
46 | #define LoadVector(S,b,n,size) LoadMem(S,b,n,size) | ||
47 | |||
48 | static void LoadBlock(LoadState* S, void* b, size_t size) | ||
49 | { | ||
50 | size_t r=luaZ_read(S->Z,b,size); | ||
51 | IF (r!=0, "unexpected end"); | ||
52 | } | ||
53 | |||
54 | static int LoadChar(LoadState* S) | ||
55 | { | ||
56 | char x; | ||
57 | LoadVar(S,x); | ||
58 | return x; | ||
59 | } | ||
60 | |||
61 | static int LoadInt(LoadState* S) | ||
62 | { | ||
63 | int x; | ||
64 | LoadVar(S,x); | ||
65 | IF (x<0, "bad integer"); | ||
66 | return x; | ||
67 | } | ||
68 | |||
69 | static lua_Number LoadNumber(LoadState* S) | ||
70 | { | ||
71 | lua_Number x; | ||
72 | LoadVar(S,x); | ||
73 | return x; | ||
74 | } | ||
75 | |||
76 | static TString* LoadString(LoadState* S) | ||
77 | { | ||
78 | size_t size; | ||
79 | LoadVar(S,size); | ||
80 | if (size==0) | ||
81 | return NULL; | ||
82 | else | ||
83 | { | ||
84 | char* s=luaZ_openspace(S->L,S->b,size); | ||
85 | LoadBlock(S,s,size); | ||
86 | return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */ | ||
87 | } | ||
88 | } | ||
89 | |||
90 | static void LoadCode(LoadState* S, Proto* f) | ||
91 | { | ||
92 | int n=LoadInt(S); | ||
93 | f->code=luaM_newvector(S->L,n,Instruction); | ||
94 | f->sizecode=n; | ||
95 | LoadVector(S,f->code,n,sizeof(Instruction)); | ||
96 | } | ||
97 | |||
98 | static Proto* LoadFunction(LoadState* S, TString* p); | ||
99 | |||
100 | static void LoadConstants(LoadState* S, Proto* f) | ||
101 | { | ||
102 | int i,n; | ||
103 | n=LoadInt(S); | ||
104 | f->k=luaM_newvector(S->L,n,TValue); | ||
105 | f->sizek=n; | ||
106 | for (i=0; i<n; i++) setnilvalue(&f->k[i]); | ||
107 | for (i=0; i<n; i++) | ||
108 | { | ||
109 | TValue* o=&f->k[i]; | ||
110 | int t=LoadChar(S); | ||
111 | switch (t) | ||
112 | { | ||
113 | case LUA_TNIL: | ||
114 | setnilvalue(o); | ||
115 | break; | ||
116 | case LUA_TBOOLEAN: | ||
117 | setbvalue(o,LoadChar(S)!=0); | ||
118 | break; | ||
119 | case LUA_TNUMBER: | ||
120 | setnvalue(o,LoadNumber(S)); | ||
121 | break; | ||
122 | case LUA_TSTRING: | ||
123 | setsvalue2n(S->L,o,LoadString(S)); | ||
124 | break; | ||
125 | default: | ||
126 | error(S,"bad constant"); | ||
127 | break; | ||
128 | } | ||
129 | } | ||
130 | n=LoadInt(S); | ||
131 | f->p=luaM_newvector(S->L,n,Proto*); | ||
132 | f->sizep=n; | ||
133 | for (i=0; i<n; i++) f->p[i]=NULL; | ||
134 | for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source); | ||
135 | } | ||
136 | |||
137 | static void LoadDebug(LoadState* S, Proto* f) | ||
138 | { | ||
139 | int i,n; | ||
140 | n=LoadInt(S); | ||
141 | f->lineinfo=luaM_newvector(S->L,n,int); | ||
142 | f->sizelineinfo=n; | ||
143 | LoadVector(S,f->lineinfo,n,sizeof(int)); | ||
144 | n=LoadInt(S); | ||
145 | f->locvars=luaM_newvector(S->L,n,LocVar); | ||
146 | f->sizelocvars=n; | ||
147 | for (i=0; i<n; i++) f->locvars[i].varname=NULL; | ||
148 | for (i=0; i<n; i++) | ||
149 | { | ||
150 | f->locvars[i].varname=LoadString(S); | ||
151 | f->locvars[i].startpc=LoadInt(S); | ||
152 | f->locvars[i].endpc=LoadInt(S); | ||
153 | } | ||
154 | n=LoadInt(S); | ||
155 | f->upvalues=luaM_newvector(S->L,n,TString*); | ||
156 | f->sizeupvalues=n; | ||
157 | for (i=0; i<n; i++) f->upvalues[i]=NULL; | ||
158 | for (i=0; i<n; i++) f->upvalues[i]=LoadString(S); | ||
159 | } | ||
160 | |||
161 | static Proto* LoadFunction(LoadState* S, TString* p) | ||
162 | { | ||
163 | Proto* f; | ||
164 | if (++S->L->nCcalls > LUAI_MAXCCALLS) error(S,"code too deep"); | ||
165 | f=luaF_newproto(S->L); | ||
166 | setptvalue2s(S->L,S->L->top,f); incr_top(S->L); | ||
167 | f->source=LoadString(S); if (f->source==NULL) f->source=p; | ||
168 | f->linedefined=LoadInt(S); | ||
169 | f->lastlinedefined=LoadInt(S); | ||
170 | f->nups=LoadByte(S); | ||
171 | f->numparams=LoadByte(S); | ||
172 | f->is_vararg=LoadByte(S); | ||
173 | f->maxstacksize=LoadByte(S); | ||
174 | LoadCode(S,f); | ||
175 | LoadConstants(S,f); | ||
176 | LoadDebug(S,f); | ||
177 | IF (!luaG_checkcode(f), "bad code"); | ||
178 | S->L->top--; | ||
179 | S->L->nCcalls--; | ||
180 | return f; | ||
181 | } | ||
182 | |||
183 | static void LoadHeader(LoadState* S) | ||
184 | { | ||
185 | char h[LUAC_HEADERSIZE]; | ||
186 | char s[LUAC_HEADERSIZE]; | ||
187 | luaU_header(h); | ||
188 | LoadBlock(S,s,LUAC_HEADERSIZE); | ||
189 | IF (memcmp(h,s,LUAC_HEADERSIZE)!=0, "bad header"); | ||
190 | } | ||
191 | |||
192 | /* | ||
193 | ** load precompiled chunk | ||
194 | */ | ||
195 | Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name) | ||
196 | { | ||
197 | LoadState S; | ||
198 | if (*name=='@' || *name=='=') | ||
199 | S.name=name+1; | ||
200 | else if (*name==LUA_SIGNATURE[0]) | ||
201 | S.name="binary string"; | ||
202 | else | ||
203 | S.name=name; | ||
204 | S.L=L; | ||
205 | S.Z=Z; | ||
206 | S.b=buff; | ||
207 | LoadHeader(&S); | ||
208 | return LoadFunction(&S,luaS_newliteral(L,"=?")); | ||
209 | } | ||
210 | |||
211 | /* | ||
212 | * make header | ||
213 | */ | ||
214 | void luaU_header (char* h) | ||
215 | { | ||
216 | int x=1; | ||
217 | memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-1); | ||
218 | h+=sizeof(LUA_SIGNATURE)-1; | ||
219 | *h++=(char)LUAC_VERSION; | ||
220 | *h++=(char)LUAC_FORMAT; | ||
221 | *h++=(char)*(char*)&x; /* endianness */ | ||
222 | *h++=(char)sizeof(int); | ||
223 | *h++=(char)sizeof(size_t); | ||
224 | *h++=(char)sizeof(Instruction); | ||
225 | *h++=(char)sizeof(lua_Number); | ||
226 | *h++=(char)(((lua_Number)0.5)==0); /* is lua_Number integral? */ | ||
227 | } | ||
diff --git a/apps/plugins/lua/lundump.h b/apps/plugins/lua/lundump.h new file mode 100644 index 0000000000..f791a4f173 --- /dev/null +++ b/apps/plugins/lua/lundump.h | |||
@@ -0,0 +1,36 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** load precompiled Lua chunks | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lundump_h | ||
8 | #define lundump_h | ||
9 | |||
10 | #include "lobject.h" | ||
11 | #include "lzio.h" | ||
12 | |||
13 | /* load one chunk; from lundump.c */ | ||
14 | LUAI_FUNC Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name); | ||
15 | |||
16 | /* make header; from lundump.c */ | ||
17 | LUAI_FUNC void luaU_header (char* h); | ||
18 | |||
19 | /* dump one chunk; from ldump.c */ | ||
20 | LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip); | ||
21 | |||
22 | #ifdef luac_c | ||
23 | /* print one chunk; from print.c */ | ||
24 | LUAI_FUNC void luaU_print (const Proto* f, int full); | ||
25 | #endif | ||
26 | |||
27 | /* for header of binary files -- this is Lua 5.1 */ | ||
28 | #define LUAC_VERSION 0x51 | ||
29 | |||
30 | /* for header of binary files -- this is the official format */ | ||
31 | #define LUAC_FORMAT 0 | ||
32 | |||
33 | /* size of header of binary files */ | ||
34 | #define LUAC_HEADERSIZE 12 | ||
35 | |||
36 | #endif | ||
diff --git a/apps/plugins/lua/lvm.c b/apps/plugins/lua/lvm.c new file mode 100644 index 0000000000..ee3256ab94 --- /dev/null +++ b/apps/plugins/lua/lvm.c | |||
@@ -0,0 +1,763 @@ | |||
1 | /* | ||
2 | ** $Id: lvm.c,v 2.63.1.3 2007/12/28 15:32:23 roberto Exp $ | ||
3 | ** Lua virtual machine | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <stdio.h> | ||
9 | #include <stdlib.h> | ||
10 | #include <string.h> | ||
11 | |||
12 | #define lvm_c | ||
13 | #define LUA_CORE | ||
14 | |||
15 | #include "lua.h" | ||
16 | |||
17 | #include "ldebug.h" | ||
18 | #include "ldo.h" | ||
19 | #include "lfunc.h" | ||
20 | #include "lgc.h" | ||
21 | #include "lobject.h" | ||
22 | #include "lopcodes.h" | ||
23 | #include "lstate.h" | ||
24 | #include "lstring.h" | ||
25 | #include "ltable.h" | ||
26 | #include "ltm.h" | ||
27 | #include "lvm.h" | ||
28 | |||
29 | |||
30 | |||
31 | /* limit for table tag-method chains (to avoid loops) */ | ||
32 | #define MAXTAGLOOP 100 | ||
33 | |||
34 | |||
35 | const TValue *luaV_tonumber (const TValue *obj, TValue *n) { | ||
36 | lua_Number num; | ||
37 | if (ttisnumber(obj)) return obj; | ||
38 | if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) { | ||
39 | setnvalue(n, num); | ||
40 | return n; | ||
41 | } | ||
42 | else | ||
43 | return NULL; | ||
44 | } | ||
45 | |||
46 | |||
47 | int luaV_tostring (lua_State *L, StkId obj) { | ||
48 | if (!ttisnumber(obj)) | ||
49 | return 0; | ||
50 | else { | ||
51 | char s[LUAI_MAXNUMBER2STR]; | ||
52 | lua_Number n = nvalue(obj); | ||
53 | lua_number2str(s, n); | ||
54 | setsvalue2s(L, obj, luaS_new(L, s)); | ||
55 | return 1; | ||
56 | } | ||
57 | } | ||
58 | |||
59 | |||
60 | static void traceexec (lua_State *L, const Instruction *pc) { | ||
61 | lu_byte mask = L->hookmask; | ||
62 | const Instruction *oldpc = L->savedpc; | ||
63 | L->savedpc = pc; | ||
64 | if ((mask & LUA_MASKCOUNT) && L->hookcount == 0) { | ||
65 | resethookcount(L); | ||
66 | luaD_callhook(L, LUA_HOOKCOUNT, -1); | ||
67 | } | ||
68 | if (mask & LUA_MASKLINE) { | ||
69 | Proto *p = ci_func(L->ci)->l.p; | ||
70 | int npc = pcRel(pc, p); | ||
71 | int newline = getline(p, npc); | ||
72 | /* call linehook when enter a new function, when jump back (loop), | ||
73 | or when enter a new line */ | ||
74 | if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p))) | ||
75 | luaD_callhook(L, LUA_HOOKLINE, newline); | ||
76 | } | ||
77 | } | ||
78 | |||
79 | |||
80 | static void callTMres (lua_State *L, StkId res, const TValue *f, | ||
81 | const TValue *p1, const TValue *p2) { | ||
82 | ptrdiff_t result = savestack(L, res); | ||
83 | setobj2s(L, L->top, f); /* push function */ | ||
84 | setobj2s(L, L->top+1, p1); /* 1st argument */ | ||
85 | setobj2s(L, L->top+2, p2); /* 2nd argument */ | ||
86 | luaD_checkstack(L, 3); | ||
87 | L->top += 3; | ||
88 | luaD_call(L, L->top - 3, 1); | ||
89 | res = restorestack(L, result); | ||
90 | L->top--; | ||
91 | setobjs2s(L, res, L->top); | ||
92 | } | ||
93 | |||
94 | |||
95 | |||
96 | static void callTM (lua_State *L, const TValue *f, const TValue *p1, | ||
97 | const TValue *p2, const TValue *p3) { | ||
98 | setobj2s(L, L->top, f); /* push function */ | ||
99 | setobj2s(L, L->top+1, p1); /* 1st argument */ | ||
100 | setobj2s(L, L->top+2, p2); /* 2nd argument */ | ||
101 | setobj2s(L, L->top+3, p3); /* 3th argument */ | ||
102 | luaD_checkstack(L, 4); | ||
103 | L->top += 4; | ||
104 | luaD_call(L, L->top - 4, 0); | ||
105 | } | ||
106 | |||
107 | |||
108 | void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) { | ||
109 | int loop; | ||
110 | for (loop = 0; loop < MAXTAGLOOP; loop++) { | ||
111 | const TValue *tm; | ||
112 | if (ttistable(t)) { /* `t' is a table? */ | ||
113 | Table *h = hvalue(t); | ||
114 | const TValue *res = luaH_get(h, key); /* do a primitive get */ | ||
115 | if (!ttisnil(res) || /* result is no nil? */ | ||
116 | (tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) { /* or no TM? */ | ||
117 | setobj2s(L, val, res); | ||
118 | return; | ||
119 | } | ||
120 | /* else will try the tag method */ | ||
121 | } | ||
122 | else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX))) | ||
123 | luaG_typeerror(L, t, "index"); | ||
124 | if (ttisfunction(tm)) { | ||
125 | callTMres(L, val, tm, t, key); | ||
126 | return; | ||
127 | } | ||
128 | t = tm; /* else repeat with `tm' */ | ||
129 | } | ||
130 | luaG_runerror(L, "loop in gettable"); | ||
131 | } | ||
132 | |||
133 | |||
134 | void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) { | ||
135 | int loop; | ||
136 | for (loop = 0; loop < MAXTAGLOOP; loop++) { | ||
137 | const TValue *tm; | ||
138 | if (ttistable(t)) { /* `t' is a table? */ | ||
139 | Table *h = hvalue(t); | ||
140 | TValue *oldval = luaH_set(L, h, key); /* do a primitive set */ | ||
141 | if (!ttisnil(oldval) || /* result is no nil? */ | ||
142 | (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */ | ||
143 | setobj2t(L, oldval, val); | ||
144 | luaC_barriert(L, h, val); | ||
145 | return; | ||
146 | } | ||
147 | /* else will try the tag method */ | ||
148 | } | ||
149 | else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX))) | ||
150 | luaG_typeerror(L, t, "index"); | ||
151 | if (ttisfunction(tm)) { | ||
152 | callTM(L, tm, t, key, val); | ||
153 | return; | ||
154 | } | ||
155 | t = tm; /* else repeat with `tm' */ | ||
156 | } | ||
157 | luaG_runerror(L, "loop in settable"); | ||
158 | } | ||
159 | |||
160 | |||
161 | static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2, | ||
162 | StkId res, TMS event) { | ||
163 | const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */ | ||
164 | if (ttisnil(tm)) | ||
165 | tm = luaT_gettmbyobj(L, p2, event); /* try second operand */ | ||
166 | if (ttisnil(tm)) return 0; | ||
167 | callTMres(L, res, tm, p1, p2); | ||
168 | return 1; | ||
169 | } | ||
170 | |||
171 | |||
172 | static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2, | ||
173 | TMS event) { | ||
174 | const TValue *tm1 = fasttm(L, mt1, event); | ||
175 | const TValue *tm2; | ||
176 | if (tm1 == NULL) return NULL; /* no metamethod */ | ||
177 | if (mt1 == mt2) return tm1; /* same metatables => same metamethods */ | ||
178 | tm2 = fasttm(L, mt2, event); | ||
179 | if (tm2 == NULL) return NULL; /* no metamethod */ | ||
180 | if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */ | ||
181 | return tm1; | ||
182 | return NULL; | ||
183 | } | ||
184 | |||
185 | |||
186 | static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2, | ||
187 | TMS event) { | ||
188 | const TValue *tm1 = luaT_gettmbyobj(L, p1, event); | ||
189 | const TValue *tm2; | ||
190 | if (ttisnil(tm1)) return -1; /* no metamethod? */ | ||
191 | tm2 = luaT_gettmbyobj(L, p2, event); | ||
192 | if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */ | ||
193 | return -1; | ||
194 | callTMres(L, L->top, tm1, p1, p2); | ||
195 | return !l_isfalse(L->top); | ||
196 | } | ||
197 | |||
198 | |||
199 | static int l_strcmp (const TString *ls, const TString *rs) { | ||
200 | const char *l = getstr(ls); | ||
201 | size_t ll = ls->tsv.len; | ||
202 | const char *r = getstr(rs); | ||
203 | size_t lr = rs->tsv.len; | ||
204 | for (;;) { | ||
205 | int temp = strcoll(l, r); | ||
206 | if (temp != 0) return temp; | ||
207 | else { /* strings are equal up to a `\0' */ | ||
208 | size_t len = strlen(l); /* index of first `\0' in both strings */ | ||
209 | if (len == lr) /* r is finished? */ | ||
210 | return (len == ll) ? 0 : 1; | ||
211 | else if (len == ll) /* l is finished? */ | ||
212 | return -1; /* l is smaller than r (because r is not finished) */ | ||
213 | /* both strings longer than `len'; go on comparing (after the `\0') */ | ||
214 | len++; | ||
215 | l += len; ll -= len; r += len; lr -= len; | ||
216 | } | ||
217 | } | ||
218 | } | ||
219 | |||
220 | |||
221 | int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) { | ||
222 | int res; | ||
223 | if (ttype(l) != ttype(r)) | ||
224 | return luaG_ordererror(L, l, r); | ||
225 | else if (ttisnumber(l)) | ||
226 | return luai_numlt(nvalue(l), nvalue(r)); | ||
227 | else if (ttisstring(l)) | ||
228 | return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0; | ||
229 | else if ((res = call_orderTM(L, l, r, TM_LT)) != -1) | ||
230 | return res; | ||
231 | return luaG_ordererror(L, l, r); | ||
232 | } | ||
233 | |||
234 | |||
235 | static int lessequal (lua_State *L, const TValue *l, const TValue *r) { | ||
236 | int res; | ||
237 | if (ttype(l) != ttype(r)) | ||
238 | return luaG_ordererror(L, l, r); | ||
239 | else if (ttisnumber(l)) | ||
240 | return luai_numle(nvalue(l), nvalue(r)); | ||
241 | else if (ttisstring(l)) | ||
242 | return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0; | ||
243 | else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */ | ||
244 | return res; | ||
245 | else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */ | ||
246 | return !res; | ||
247 | return luaG_ordererror(L, l, r); | ||
248 | } | ||
249 | |||
250 | |||
251 | int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) { | ||
252 | const TValue *tm; | ||
253 | lua_assert(ttype(t1) == ttype(t2)); | ||
254 | switch (ttype(t1)) { | ||
255 | case LUA_TNIL: return 1; | ||
256 | case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2)); | ||
257 | case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */ | ||
258 | case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2); | ||
259 | case LUA_TUSERDATA: { | ||
260 | if (uvalue(t1) == uvalue(t2)) return 1; | ||
261 | tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable, | ||
262 | TM_EQ); | ||
263 | break; /* will try TM */ | ||
264 | } | ||
265 | case LUA_TTABLE: { | ||
266 | if (hvalue(t1) == hvalue(t2)) return 1; | ||
267 | tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ); | ||
268 | break; /* will try TM */ | ||
269 | } | ||
270 | default: return gcvalue(t1) == gcvalue(t2); | ||
271 | } | ||
272 | if (tm == NULL) return 0; /* no TM? */ | ||
273 | callTMres(L, L->top, tm, t1, t2); /* call TM */ | ||
274 | return !l_isfalse(L->top); | ||
275 | } | ||
276 | |||
277 | |||
278 | void luaV_concat (lua_State *L, int total, int last) { | ||
279 | do { | ||
280 | StkId top = L->base + last + 1; | ||
281 | int n = 2; /* number of elements handled in this pass (at least 2) */ | ||
282 | if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) { | ||
283 | if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT)) | ||
284 | luaG_concaterror(L, top-2, top-1); | ||
285 | } else if (tsvalue(top-1)->len == 0) /* second op is empty? */ | ||
286 | (void)tostring(L, top - 2); /* result is first op (as string) */ | ||
287 | else { | ||
288 | /* at least two string values; get as many as possible */ | ||
289 | size_t tl = tsvalue(top-1)->len; | ||
290 | char *buffer; | ||
291 | int i; | ||
292 | /* collect total length */ | ||
293 | for (n = 1; n < total && tostring(L, top-n-1); n++) { | ||
294 | size_t l = tsvalue(top-n-1)->len; | ||
295 | if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow"); | ||
296 | tl += l; | ||
297 | } | ||
298 | buffer = luaZ_openspace(L, &G(L)->buff, tl); | ||
299 | tl = 0; | ||
300 | for (i=n; i>0; i--) { /* concat all strings */ | ||
301 | size_t l = tsvalue(top-i)->len; | ||
302 | memcpy(buffer+tl, svalue(top-i), l); | ||
303 | tl += l; | ||
304 | } | ||
305 | setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl)); | ||
306 | } | ||
307 | total -= n-1; /* got `n' strings to create 1 new */ | ||
308 | last -= n-1; | ||
309 | } while (total > 1); /* repeat until only 1 result left */ | ||
310 | } | ||
311 | |||
312 | |||
313 | static void Arith (lua_State *L, StkId ra, const TValue *rb, | ||
314 | const TValue *rc, TMS op) { | ||
315 | TValue tempb, tempc; | ||
316 | const TValue *b, *c; | ||
317 | if ((b = luaV_tonumber(rb, &tempb)) != NULL && | ||
318 | (c = luaV_tonumber(rc, &tempc)) != NULL) { | ||
319 | lua_Number nb = nvalue(b), nc = nvalue(c); | ||
320 | switch (op) { | ||
321 | case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break; | ||
322 | case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break; | ||
323 | case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break; | ||
324 | case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break; | ||
325 | case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break; | ||
326 | case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break; | ||
327 | case TM_UNM: setnvalue(ra, luai_numunm(nb)); break; | ||
328 | default: lua_assert(0); break; | ||
329 | } | ||
330 | } | ||
331 | else if (!call_binTM(L, rb, rc, ra, op)) | ||
332 | luaG_aritherror(L, rb, rc); | ||
333 | } | ||
334 | |||
335 | |||
336 | |||
337 | /* | ||
338 | ** some macros for common tasks in `luaV_execute' | ||
339 | */ | ||
340 | |||
341 | #define runtime_check(L, c) { if (!(c)) break; } | ||
342 | |||
343 | #define RA(i) (base+GETARG_A(i)) | ||
344 | /* to be used after possible stack reallocation */ | ||
345 | #define RB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i)) | ||
346 | #define RC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i)) | ||
347 | #define RKB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \ | ||
348 | ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i)) | ||
349 | #define RKC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \ | ||
350 | ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i)) | ||
351 | #define KBx(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i)) | ||
352 | |||
353 | |||
354 | #define dojump(L,pc,i) {(pc) += (i); luai_threadyield(L);} | ||
355 | |||
356 | |||
357 | #define Protect(x) { L->savedpc = pc; {x;}; base = L->base; } | ||
358 | |||
359 | |||
360 | #define arith_op(op,tm) { \ | ||
361 | TValue *rb = RKB(i); \ | ||
362 | TValue *rc = RKC(i); \ | ||
363 | if (ttisnumber(rb) && ttisnumber(rc)) { \ | ||
364 | lua_Number nb = nvalue(rb), nc = nvalue(rc); \ | ||
365 | setnvalue(ra, op(nb, nc)); \ | ||
366 | } \ | ||
367 | else \ | ||
368 | Protect(Arith(L, ra, rb, rc, tm)); \ | ||
369 | } | ||
370 | |||
371 | |||
372 | |||
373 | void luaV_execute (lua_State *L, int nexeccalls) { | ||
374 | LClosure *cl; | ||
375 | StkId base; | ||
376 | TValue *k; | ||
377 | const Instruction *pc; | ||
378 | reentry: /* entry point */ | ||
379 | lua_assert(isLua(L->ci)); | ||
380 | pc = L->savedpc; | ||
381 | cl = &clvalue(L->ci->func)->l; | ||
382 | base = L->base; | ||
383 | k = cl->p->k; | ||
384 | /* main loop of interpreter */ | ||
385 | for (;;) { | ||
386 | const Instruction i = *pc++; | ||
387 | StkId ra; | ||
388 | if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) && | ||
389 | (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) { | ||
390 | traceexec(L, pc); | ||
391 | if (L->status == LUA_YIELD) { /* did hook yield? */ | ||
392 | L->savedpc = pc - 1; | ||
393 | return; | ||
394 | } | ||
395 | base = L->base; | ||
396 | } | ||
397 | /* warning!! several calls may realloc the stack and invalidate `ra' */ | ||
398 | ra = RA(i); | ||
399 | lua_assert(base == L->base && L->base == L->ci->base); | ||
400 | lua_assert(base <= L->top && L->top <= L->stack + L->stacksize); | ||
401 | lua_assert(L->top == L->ci->top || luaG_checkopenop(i)); | ||
402 | switch (GET_OPCODE(i)) { | ||
403 | case OP_MOVE: { | ||
404 | setobjs2s(L, ra, RB(i)); | ||
405 | continue; | ||
406 | } | ||
407 | case OP_LOADK: { | ||
408 | setobj2s(L, ra, KBx(i)); | ||
409 | continue; | ||
410 | } | ||
411 | case OP_LOADBOOL: { | ||
412 | setbvalue(ra, GETARG_B(i)); | ||
413 | if (GETARG_C(i)) pc++; /* skip next instruction (if C) */ | ||
414 | continue; | ||
415 | } | ||
416 | case OP_LOADNIL: { | ||
417 | TValue *rb = RB(i); | ||
418 | do { | ||
419 | setnilvalue(rb--); | ||
420 | } while (rb >= ra); | ||
421 | continue; | ||
422 | } | ||
423 | case OP_GETUPVAL: { | ||
424 | int b = GETARG_B(i); | ||
425 | setobj2s(L, ra, cl->upvals[b]->v); | ||
426 | continue; | ||
427 | } | ||
428 | case OP_GETGLOBAL: { | ||
429 | TValue g; | ||
430 | TValue *rb = KBx(i); | ||
431 | sethvalue(L, &g, cl->env); | ||
432 | lua_assert(ttisstring(rb)); | ||
433 | Protect(luaV_gettable(L, &g, rb, ra)); | ||
434 | continue; | ||
435 | } | ||
436 | case OP_GETTABLE: { | ||
437 | Protect(luaV_gettable(L, RB(i), RKC(i), ra)); | ||
438 | continue; | ||
439 | } | ||
440 | case OP_SETGLOBAL: { | ||
441 | TValue g; | ||
442 | sethvalue(L, &g, cl->env); | ||
443 | lua_assert(ttisstring(KBx(i))); | ||
444 | Protect(luaV_settable(L, &g, KBx(i), ra)); | ||
445 | continue; | ||
446 | } | ||
447 | case OP_SETUPVAL: { | ||
448 | UpVal *uv = cl->upvals[GETARG_B(i)]; | ||
449 | setobj(L, uv->v, ra); | ||
450 | luaC_barrier(L, uv, ra); | ||
451 | continue; | ||
452 | } | ||
453 | case OP_SETTABLE: { | ||
454 | Protect(luaV_settable(L, ra, RKB(i), RKC(i))); | ||
455 | continue; | ||
456 | } | ||
457 | case OP_NEWTABLE: { | ||
458 | int b = GETARG_B(i); | ||
459 | int c = GETARG_C(i); | ||
460 | sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c))); | ||
461 | Protect(luaC_checkGC(L)); | ||
462 | continue; | ||
463 | } | ||
464 | case OP_SELF: { | ||
465 | StkId rb = RB(i); | ||
466 | setobjs2s(L, ra+1, rb); | ||
467 | Protect(luaV_gettable(L, rb, RKC(i), ra)); | ||
468 | continue; | ||
469 | } | ||
470 | case OP_ADD: { | ||
471 | arith_op(luai_numadd, TM_ADD); | ||
472 | continue; | ||
473 | } | ||
474 | case OP_SUB: { | ||
475 | arith_op(luai_numsub, TM_SUB); | ||
476 | continue; | ||
477 | } | ||
478 | case OP_MUL: { | ||
479 | arith_op(luai_nummul, TM_MUL); | ||
480 | continue; | ||
481 | } | ||
482 | case OP_DIV: { | ||
483 | arith_op(luai_numdiv, TM_DIV); | ||
484 | continue; | ||
485 | } | ||
486 | case OP_MOD: { | ||
487 | arith_op(luai_nummod, TM_MOD); | ||
488 | continue; | ||
489 | } | ||
490 | case OP_POW: { | ||
491 | arith_op(luai_numpow, TM_POW); | ||
492 | continue; | ||
493 | } | ||
494 | case OP_UNM: { | ||
495 | TValue *rb = RB(i); | ||
496 | if (ttisnumber(rb)) { | ||
497 | lua_Number nb = nvalue(rb); | ||
498 | setnvalue(ra, luai_numunm(nb)); | ||
499 | } | ||
500 | else { | ||
501 | Protect(Arith(L, ra, rb, rb, TM_UNM)); | ||
502 | } | ||
503 | continue; | ||
504 | } | ||
505 | case OP_NOT: { | ||
506 | int res = l_isfalse(RB(i)); /* next assignment may change this value */ | ||
507 | setbvalue(ra, res); | ||
508 | continue; | ||
509 | } | ||
510 | case OP_LEN: { | ||
511 | const TValue *rb = RB(i); | ||
512 | switch (ttype(rb)) { | ||
513 | case LUA_TTABLE: { | ||
514 | setnvalue(ra, cast_num(luaH_getn(hvalue(rb)))); | ||
515 | break; | ||
516 | } | ||
517 | case LUA_TSTRING: { | ||
518 | setnvalue(ra, cast_num(tsvalue(rb)->len)); | ||
519 | break; | ||
520 | } | ||
521 | default: { /* try metamethod */ | ||
522 | Protect( | ||
523 | if (!call_binTM(L, rb, luaO_nilobject, ra, TM_LEN)) | ||
524 | luaG_typeerror(L, rb, "get length of"); | ||
525 | ) | ||
526 | } | ||
527 | } | ||
528 | continue; | ||
529 | } | ||
530 | case OP_CONCAT: { | ||
531 | int b = GETARG_B(i); | ||
532 | int c = GETARG_C(i); | ||
533 | Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L)); | ||
534 | setobjs2s(L, RA(i), base+b); | ||
535 | continue; | ||
536 | } | ||
537 | case OP_JMP: { | ||
538 | dojump(L, pc, GETARG_sBx(i)); | ||
539 | continue; | ||
540 | } | ||
541 | case OP_EQ: { | ||
542 | TValue *rb = RKB(i); | ||
543 | TValue *rc = RKC(i); | ||
544 | Protect( | ||
545 | if (equalobj(L, rb, rc) == GETARG_A(i)) | ||
546 | dojump(L, pc, GETARG_sBx(*pc)); | ||
547 | ) | ||
548 | pc++; | ||
549 | continue; | ||
550 | } | ||
551 | case OP_LT: { | ||
552 | Protect( | ||
553 | if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i)) | ||
554 | dojump(L, pc, GETARG_sBx(*pc)); | ||
555 | ) | ||
556 | pc++; | ||
557 | continue; | ||
558 | } | ||
559 | case OP_LE: { | ||
560 | Protect( | ||
561 | if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i)) | ||
562 | dojump(L, pc, GETARG_sBx(*pc)); | ||
563 | ) | ||
564 | pc++; | ||
565 | continue; | ||
566 | } | ||
567 | case OP_TEST: { | ||
568 | if (l_isfalse(ra) != GETARG_C(i)) | ||
569 | dojump(L, pc, GETARG_sBx(*pc)); | ||
570 | pc++; | ||
571 | continue; | ||
572 | } | ||
573 | case OP_TESTSET: { | ||
574 | TValue *rb = RB(i); | ||
575 | if (l_isfalse(rb) != GETARG_C(i)) { | ||
576 | setobjs2s(L, ra, rb); | ||
577 | dojump(L, pc, GETARG_sBx(*pc)); | ||
578 | } | ||
579 | pc++; | ||
580 | continue; | ||
581 | } | ||
582 | case OP_CALL: { | ||
583 | int b = GETARG_B(i); | ||
584 | int nresults = GETARG_C(i) - 1; | ||
585 | if (b != 0) L->top = ra+b; /* else previous instruction set top */ | ||
586 | L->savedpc = pc; | ||
587 | switch (luaD_precall(L, ra, nresults)) { | ||
588 | case PCRLUA: { | ||
589 | nexeccalls++; | ||
590 | goto reentry; /* restart luaV_execute over new Lua function */ | ||
591 | } | ||
592 | case PCRC: { | ||
593 | /* it was a C function (`precall' called it); adjust results */ | ||
594 | if (nresults >= 0) L->top = L->ci->top; | ||
595 | base = L->base; | ||
596 | continue; | ||
597 | } | ||
598 | default: { | ||
599 | return; /* yield */ | ||
600 | } | ||
601 | } | ||
602 | } | ||
603 | case OP_TAILCALL: { | ||
604 | int b = GETARG_B(i); | ||
605 | if (b != 0) L->top = ra+b; /* else previous instruction set top */ | ||
606 | L->savedpc = pc; | ||
607 | lua_assert(GETARG_C(i) - 1 == LUA_MULTRET); | ||
608 | switch (luaD_precall(L, ra, LUA_MULTRET)) { | ||
609 | case PCRLUA: { | ||
610 | /* tail call: put new frame in place of previous one */ | ||
611 | CallInfo *ci = L->ci - 1; /* previous frame */ | ||
612 | int aux; | ||
613 | StkId func = ci->func; | ||
614 | StkId pfunc = (ci+1)->func; /* previous function index */ | ||
615 | if (L->openupval) luaF_close(L, ci->base); | ||
616 | L->base = ci->base = ci->func + ((ci+1)->base - pfunc); | ||
617 | for (aux = 0; pfunc+aux < L->top; aux++) /* move frame down */ | ||
618 | setobjs2s(L, func+aux, pfunc+aux); | ||
619 | ci->top = L->top = func+aux; /* correct top */ | ||
620 | lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize); | ||
621 | ci->savedpc = L->savedpc; | ||
622 | ci->tailcalls++; /* one more call lost */ | ||
623 | L->ci--; /* remove new frame */ | ||
624 | goto reentry; | ||
625 | } | ||
626 | case PCRC: { /* it was a C function (`precall' called it) */ | ||
627 | base = L->base; | ||
628 | continue; | ||
629 | } | ||
630 | default: { | ||
631 | return; /* yield */ | ||
632 | } | ||
633 | } | ||
634 | } | ||
635 | case OP_RETURN: { | ||
636 | int b = GETARG_B(i); | ||
637 | if (b != 0) L->top = ra+b-1; | ||
638 | if (L->openupval) luaF_close(L, base); | ||
639 | L->savedpc = pc; | ||
640 | b = luaD_poscall(L, ra); | ||
641 | if (--nexeccalls == 0) /* was previous function running `here'? */ | ||
642 | return; /* no: return */ | ||
643 | else { /* yes: continue its execution */ | ||
644 | if (b) L->top = L->ci->top; | ||
645 | lua_assert(isLua(L->ci)); | ||
646 | lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL); | ||
647 | goto reentry; | ||
648 | } | ||
649 | } | ||
650 | case OP_FORLOOP: { | ||
651 | lua_Number step = nvalue(ra+2); | ||
652 | lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */ | ||
653 | lua_Number limit = nvalue(ra+1); | ||
654 | if (luai_numlt(0, step) ? luai_numle(idx, limit) | ||
655 | : luai_numle(limit, idx)) { | ||
656 | dojump(L, pc, GETARG_sBx(i)); /* jump back */ | ||
657 | setnvalue(ra, idx); /* update internal index... */ | ||
658 | setnvalue(ra+3, idx); /* ...and external index */ | ||
659 | } | ||
660 | continue; | ||
661 | } | ||
662 | case OP_FORPREP: { | ||
663 | const TValue *init = ra; | ||
664 | const TValue *plimit = ra+1; | ||
665 | const TValue *pstep = ra+2; | ||
666 | L->savedpc = pc; /* next steps may throw errors */ | ||
667 | if (!tonumber(init, ra)) | ||
668 | luaG_runerror(L, LUA_QL("for") " initial value must be a number"); | ||
669 | else if (!tonumber(plimit, ra+1)) | ||
670 | luaG_runerror(L, LUA_QL("for") " limit must be a number"); | ||
671 | else if (!tonumber(pstep, ra+2)) | ||
672 | luaG_runerror(L, LUA_QL("for") " step must be a number"); | ||
673 | setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep))); | ||
674 | dojump(L, pc, GETARG_sBx(i)); | ||
675 | continue; | ||
676 | } | ||
677 | case OP_TFORLOOP: { | ||
678 | StkId cb = ra + 3; /* call base */ | ||
679 | setobjs2s(L, cb+2, ra+2); | ||
680 | setobjs2s(L, cb+1, ra+1); | ||
681 | setobjs2s(L, cb, ra); | ||
682 | L->top = cb+3; /* func. + 2 args (state and index) */ | ||
683 | Protect(luaD_call(L, cb, GETARG_C(i))); | ||
684 | L->top = L->ci->top; | ||
685 | cb = RA(i) + 3; /* previous call may change the stack */ | ||
686 | if (!ttisnil(cb)) { /* continue loop? */ | ||
687 | setobjs2s(L, cb-1, cb); /* save control variable */ | ||
688 | dojump(L, pc, GETARG_sBx(*pc)); /* jump back */ | ||
689 | } | ||
690 | pc++; | ||
691 | continue; | ||
692 | } | ||
693 | case OP_SETLIST: { | ||
694 | int n = GETARG_B(i); | ||
695 | int c = GETARG_C(i); | ||
696 | int last; | ||
697 | Table *h; | ||
698 | if (n == 0) { | ||
699 | n = cast_int(L->top - ra) - 1; | ||
700 | L->top = L->ci->top; | ||
701 | } | ||
702 | if (c == 0) c = cast_int(*pc++); | ||
703 | runtime_check(L, ttistable(ra)); | ||
704 | h = hvalue(ra); | ||
705 | last = ((c-1)*LFIELDS_PER_FLUSH) + n; | ||
706 | if (last > h->sizearray) /* needs more space? */ | ||
707 | luaH_resizearray(L, h, last); /* pre-alloc it at once */ | ||
708 | for (; n > 0; n--) { | ||
709 | TValue *val = ra+n; | ||
710 | setobj2t(L, luaH_setnum(L, h, last--), val); | ||
711 | luaC_barriert(L, h, val); | ||
712 | } | ||
713 | continue; | ||
714 | } | ||
715 | case OP_CLOSE: { | ||
716 | luaF_close(L, ra); | ||
717 | continue; | ||
718 | } | ||
719 | case OP_CLOSURE: { | ||
720 | Proto *p; | ||
721 | Closure *ncl; | ||
722 | int nup, j; | ||
723 | p = cl->p->p[GETARG_Bx(i)]; | ||
724 | nup = p->nups; | ||
725 | ncl = luaF_newLclosure(L, nup, cl->env); | ||
726 | ncl->l.p = p; | ||
727 | for (j=0; j<nup; j++, pc++) { | ||
728 | if (GET_OPCODE(*pc) == OP_GETUPVAL) | ||
729 | ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)]; | ||
730 | else { | ||
731 | lua_assert(GET_OPCODE(*pc) == OP_MOVE); | ||
732 | ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc)); | ||
733 | } | ||
734 | } | ||
735 | setclvalue(L, ra, ncl); | ||
736 | Protect(luaC_checkGC(L)); | ||
737 | continue; | ||
738 | } | ||
739 | case OP_VARARG: { | ||
740 | int b = GETARG_B(i) - 1; | ||
741 | int j; | ||
742 | CallInfo *ci = L->ci; | ||
743 | int n = cast_int(ci->base - ci->func) - cl->p->numparams - 1; | ||
744 | if (b == LUA_MULTRET) { | ||
745 | Protect(luaD_checkstack(L, n)); | ||
746 | ra = RA(i); /* previous call may change the stack */ | ||
747 | b = n; | ||
748 | L->top = ra + n; | ||
749 | } | ||
750 | for (j = 0; j < b; j++) { | ||
751 | if (j < n) { | ||
752 | setobjs2s(L, ra + j, ci->base - n + j); | ||
753 | } | ||
754 | else { | ||
755 | setnilvalue(ra + j); | ||
756 | } | ||
757 | } | ||
758 | continue; | ||
759 | } | ||
760 | } | ||
761 | } | ||
762 | } | ||
763 | |||
diff --git a/apps/plugins/lua/lvm.h b/apps/plugins/lua/lvm.h new file mode 100644 index 0000000000..dff2a139f7 --- /dev/null +++ b/apps/plugins/lua/lvm.h | |||
@@ -0,0 +1,36 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Lua virtual machine | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | #ifndef lvm_h | ||
8 | #define lvm_h | ||
9 | |||
10 | |||
11 | #include "ldo.h" | ||
12 | #include "lobject.h" | ||
13 | #include "ltm.h" | ||
14 | |||
15 | |||
16 | #define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o))) | ||
17 | |||
18 | #define tonumber(o,n) (ttype(o) == LUA_TNUMBER || \ | ||
19 | (((o) = luaV_tonumber(o,n)) != NULL)) | ||
20 | |||
21 | #define equalobj(L,o1,o2) \ | ||
22 | (ttype(o1) == ttype(o2) && luaV_equalval(L, o1, o2)) | ||
23 | |||
24 | |||
25 | LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); | ||
26 | LUAI_FUNC int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2); | ||
27 | LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n); | ||
28 | LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj); | ||
29 | LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key, | ||
30 | StkId val); | ||
31 | LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key, | ||
32 | StkId val); | ||
33 | LUAI_FUNC void luaV_execute (lua_State *L, int nexeccalls); | ||
34 | LUAI_FUNC void luaV_concat (lua_State *L, int total, int last); | ||
35 | |||
36 | #endif | ||
diff --git a/apps/plugins/lua/lzio.c b/apps/plugins/lua/lzio.c new file mode 100644 index 0000000000..293edd59b0 --- /dev/null +++ b/apps/plugins/lua/lzio.c | |||
@@ -0,0 +1,82 @@ | |||
1 | /* | ||
2 | ** $Id: lzio.c,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $ | ||
3 | ** a generic input stream interface | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #include <string.h> | ||
9 | |||
10 | #define lzio_c | ||
11 | #define LUA_CORE | ||
12 | |||
13 | #include "lua.h" | ||
14 | |||
15 | #include "llimits.h" | ||
16 | #include "lmem.h" | ||
17 | #include "lstate.h" | ||
18 | #include "lzio.h" | ||
19 | |||
20 | |||
21 | int luaZ_fill (ZIO *z) { | ||
22 | size_t size; | ||
23 | lua_State *L = z->L; | ||
24 | const char *buff; | ||
25 | lua_unlock(L); | ||
26 | buff = z->reader(L, z->data, &size); | ||
27 | lua_lock(L); | ||
28 | if (buff == NULL || size == 0) return EOZ; | ||
29 | z->n = size - 1; | ||
30 | z->p = buff; | ||
31 | return char2int(*(z->p++)); | ||
32 | } | ||
33 | |||
34 | |||
35 | int luaZ_lookahead (ZIO *z) { | ||
36 | if (z->n == 0) { | ||
37 | if (luaZ_fill(z) == EOZ) | ||
38 | return EOZ; | ||
39 | else { | ||
40 | z->n++; /* luaZ_fill removed first byte; put back it */ | ||
41 | z->p--; | ||
42 | } | ||
43 | } | ||
44 | return char2int(*z->p); | ||
45 | } | ||
46 | |||
47 | |||
48 | void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) { | ||
49 | z->L = L; | ||
50 | z->reader = reader; | ||
51 | z->data = data; | ||
52 | z->n = 0; | ||
53 | z->p = NULL; | ||
54 | } | ||
55 | |||
56 | |||
57 | /* --------------------------------------------------------------- read --- */ | ||
58 | size_t luaZ_read (ZIO *z, void *b, size_t n) { | ||
59 | while (n) { | ||
60 | size_t m; | ||
61 | if (luaZ_lookahead(z) == EOZ) | ||
62 | return n; /* return number of missing bytes */ | ||
63 | m = (n <= z->n) ? n : z->n; /* min. between n and z->n */ | ||
64 | memcpy(b, z->p, m); | ||
65 | z->n -= m; | ||
66 | z->p += m; | ||
67 | b = (char *)b + m; | ||
68 | n -= m; | ||
69 | } | ||
70 | return 0; | ||
71 | } | ||
72 | |||
73 | /* ------------------------------------------------------------------------ */ | ||
74 | char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) { | ||
75 | if (n > buff->buffsize) { | ||
76 | if (n < LUA_MINBUFFER) n = LUA_MINBUFFER; | ||
77 | luaZ_resizebuffer(L, buff, n); | ||
78 | } | ||
79 | return buff->buffer; | ||
80 | } | ||
81 | |||
82 | |||
diff --git a/apps/plugins/lua/lzio.h b/apps/plugins/lua/lzio.h new file mode 100644 index 0000000000..9aa9e4b537 --- /dev/null +++ b/apps/plugins/lua/lzio.h | |||
@@ -0,0 +1,67 @@ | |||
1 | /* | ||
2 | ** $Id$ | ||
3 | ** Buffered streams | ||
4 | ** See Copyright Notice in lua.h | ||
5 | */ | ||
6 | |||
7 | |||
8 | #ifndef lzio_h | ||
9 | #define lzio_h | ||
10 | |||
11 | #include "lua.h" | ||
12 | |||
13 | #include "lmem.h" | ||
14 | |||
15 | |||
16 | #define EOZ (-1) /* end of stream */ | ||
17 | |||
18 | typedef struct Zio ZIO; | ||
19 | |||
20 | #define char2int(c) cast(int, cast(unsigned char, (c))) | ||
21 | |||
22 | #define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z)) | ||
23 | |||
24 | typedef struct Mbuffer { | ||
25 | char *buffer; | ||
26 | size_t n; | ||
27 | size_t buffsize; | ||
28 | } Mbuffer; | ||
29 | |||
30 | #define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0) | ||
31 | |||
32 | #define luaZ_buffer(buff) ((buff)->buffer) | ||
33 | #define luaZ_sizebuffer(buff) ((buff)->buffsize) | ||
34 | #define luaZ_bufflen(buff) ((buff)->n) | ||
35 | |||
36 | #define luaZ_resetbuffer(buff) ((buff)->n = 0) | ||
37 | |||
38 | |||
39 | #define luaZ_resizebuffer(L, buff, size) \ | ||
40 | (luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \ | ||
41 | (buff)->buffsize = size) | ||
42 | |||
43 | #define luaZ_freebuffer(L, buff) luaZ_resizebuffer(L, buff, 0) | ||
44 | |||
45 | |||
46 | LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n); | ||
47 | LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, | ||
48 | void *data); | ||
49 | LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */ | ||
50 | LUAI_FUNC int luaZ_lookahead (ZIO *z); | ||
51 | |||
52 | |||
53 | |||
54 | /* --------- Private Part ------------------ */ | ||
55 | |||
56 | struct Zio { | ||
57 | size_t n; /* bytes still unread */ | ||
58 | const char *p; /* current position in buffer */ | ||
59 | lua_Reader reader; | ||
60 | void* data; /* additional data */ | ||
61 | lua_State *L; /* Lua state (for reader) */ | ||
62 | }; | ||
63 | |||
64 | |||
65 | LUAI_FUNC int luaZ_fill (ZIO *z); | ||
66 | |||
67 | #endif | ||
diff --git a/apps/plugins/lua/malloc.c b/apps/plugins/lua/malloc.c new file mode 100644 index 0000000000..6dc00c4f9a --- /dev/null +++ b/apps/plugins/lua/malloc.c | |||
@@ -0,0 +1,5061 @@ | |||
1 | /* | ||
2 | This is a version (aka dlmalloc) of malloc/free/realloc written by | ||
3 | Doug Lea and released to the public domain, as explained at | ||
4 | http://creativecommons.org/licenses/publicdomain. Send questions, | ||
5 | comments, complaints, performance data, etc to dl@cs.oswego.edu | ||
6 | |||
7 | * Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) | ||
8 | |||
9 | Note: There may be an updated version of this malloc obtainable at | ||
10 | ftp://gee.cs.oswego.edu/pub/misc/malloc.c | ||
11 | Check before installing! | ||
12 | |||
13 | * Quickstart | ||
14 | |||
15 | This library is all in one file to simplify the most common usage: | ||
16 | ftp it, compile it (-O3), and link it into another program. All of | ||
17 | the compile-time options default to reasonable values for use on | ||
18 | most platforms. You might later want to step through various | ||
19 | compile-time and dynamic tuning options. | ||
20 | |||
21 | For convenience, an include file for code using this malloc is at: | ||
22 | ftp://gee.cs.oswego.edu/pub/misc/malloc-2.8.3.h | ||
23 | You don't really need this .h file unless you call functions not | ||
24 | defined in your system include files. The .h file contains only the | ||
25 | excerpts from this file needed for using this malloc on ANSI C/C++ | ||
26 | systems, so long as you haven't changed compile-time options about | ||
27 | naming and tuning parameters. If you do, then you can create your | ||
28 | own malloc.h that does include all settings by cutting at the point | ||
29 | indicated below. Note that you may already by default be using a C | ||
30 | library containing a malloc that is based on some version of this | ||
31 | malloc (for example in linux). You might still want to use the one | ||
32 | in this file to customize settings or to avoid overheads associated | ||
33 | with library versions. | ||
34 | |||
35 | * Vital statistics: | ||
36 | |||
37 | Supported pointer/size_t representation: 4 or 8 bytes | ||
38 | size_t MUST be an unsigned type of the same width as | ||
39 | pointers. (If you are using an ancient system that declares | ||
40 | size_t as a signed type, or need it to be a different width | ||
41 | than pointers, you can use a previous release of this malloc | ||
42 | (e.g. 2.7.2) supporting these.) | ||
43 | |||
44 | Alignment: 8 bytes (default) | ||
45 | This suffices for nearly all current machines and C compilers. | ||
46 | However, you can define MALLOC_ALIGNMENT to be wider than this | ||
47 | if necessary (up to 128bytes), at the expense of using more space. | ||
48 | |||
49 | Minimum overhead per allocated chunk: 4 or 8 bytes (if 4byte sizes) | ||
50 | 8 or 16 bytes (if 8byte sizes) | ||
51 | Each malloced chunk has a hidden word of overhead holding size | ||
52 | and status information, and additional cross-check word | ||
53 | if FOOTERS is defined. | ||
54 | |||
55 | Minimum allocated size: 4-byte ptrs: 16 bytes (including overhead) | ||
56 | 8-byte ptrs: 32 bytes (including overhead) | ||
57 | |||
58 | Even a request for zero bytes (i.e., malloc(0)) returns a | ||
59 | pointer to something of the minimum allocatable size. | ||
60 | The maximum overhead wastage (i.e., number of extra bytes | ||
61 | allocated than were requested in malloc) is less than or equal | ||
62 | to the minimum size, except for requests >= mmap_threshold that | ||
63 | are serviced via mmap(), where the worst case wastage is about | ||
64 | 32 bytes plus the remainder from a system page (the minimal | ||
65 | mmap unit); typically 4096 or 8192 bytes. | ||
66 | |||
67 | Security: static-safe; optionally more or less | ||
68 | The "security" of malloc refers to the ability of malicious | ||
69 | code to accentuate the effects of errors (for example, freeing | ||
70 | space that is not currently malloc'ed or overwriting past the | ||
71 | ends of chunks) in code that calls malloc. This malloc | ||
72 | guarantees not to modify any memory locations below the base of | ||
73 | heap, i.e., static variables, even in the presence of usage | ||
74 | errors. The routines additionally detect most improper frees | ||
75 | and reallocs. All this holds as long as the static bookkeeping | ||
76 | for malloc itself is not corrupted by some other means. This | ||
77 | is only one aspect of security -- these checks do not, and | ||
78 | cannot, detect all possible programming errors. | ||
79 | |||
80 | If FOOTERS is defined nonzero, then each allocated chunk | ||
81 | carries an additional check word to verify that it was malloced | ||
82 | from its space. These check words are the same within each | ||
83 | execution of a program using malloc, but differ across | ||
84 | executions, so externally crafted fake chunks cannot be | ||
85 | freed. This improves security by rejecting frees/reallocs that | ||
86 | could corrupt heap memory, in addition to the checks preventing | ||
87 | writes to statics that are always on. This may further improve | ||
88 | security at the expense of time and space overhead. (Note that | ||
89 | FOOTERS may also be worth using with MSPACES.) | ||
90 | |||
91 | By default detected errors cause the program to abort (calling | ||
92 | "abort()"). You can override this to instead proceed past | ||
93 | errors by defining PROCEED_ON_ERROR. In this case, a bad free | ||
94 | has no effect, and a malloc that encounters a bad address | ||
95 | caused by user overwrites will ignore the bad address by | ||
96 | dropping pointers and indices to all known memory. This may | ||
97 | be appropriate for programs that should continue if at all | ||
98 | possible in the face of programming errors, although they may | ||
99 | run out of memory because dropped memory is never reclaimed. | ||
100 | |||
101 | If you don't like either of these options, you can define | ||
102 | CORRUPTION_ERROR_ACTION and USAGE_ERROR_ACTION to do anything | ||
103 | else. And if if you are sure that your program using malloc has | ||
104 | no errors or vulnerabilities, you can define INSECURE to 1, | ||
105 | which might (or might not) provide a small performance improvement. | ||
106 | |||
107 | Thread-safety: NOT thread-safe unless USE_LOCKS defined | ||
108 | When USE_LOCKS is defined, each public call to malloc, free, | ||
109 | etc is surrounded with either a pthread mutex or a win32 | ||
110 | spinlock (depending on WIN32). This is not especially fast, and | ||
111 | can be a major bottleneck. It is designed only to provide | ||
112 | minimal protection in concurrent environments, and to provide a | ||
113 | basis for extensions. If you are using malloc in a concurrent | ||
114 | program, consider instead using ptmalloc, which is derived from | ||
115 | a version of this malloc. (See http://www.malloc.de). | ||
116 | |||
117 | System requirements: Any combination of MORECORE and/or MMAP/MUNMAP | ||
118 | This malloc can use unix sbrk or any emulation (invoked using | ||
119 | the CALL_MORECORE macro) and/or mmap/munmap or any emulation | ||
120 | (invoked using CALL_MMAP/CALL_MUNMAP) to get and release system | ||
121 | memory. On most unix systems, it tends to work best if both | ||
122 | MORECORE and MMAP are enabled. On Win32, it uses emulations | ||
123 | based on VirtualAlloc. It also uses common C library functions | ||
124 | like memset. | ||
125 | |||
126 | Compliance: I believe it is compliant with the Single Unix Specification | ||
127 | (See http://www.unix.org). Also SVID/XPG, ANSI C, and probably | ||
128 | others as well. | ||
129 | |||
130 | * Overview of algorithms | ||
131 | |||
132 | This is not the fastest, most space-conserving, most portable, or | ||
133 | most tunable malloc ever written. However it is among the fastest | ||
134 | while also being among the most space-conserving, portable and | ||
135 | tunable. Consistent balance across these factors results in a good | ||
136 | general-purpose allocator for malloc-intensive programs. | ||
137 | |||
138 | In most ways, this malloc is a best-fit allocator. Generally, it | ||
139 | chooses the best-fitting existing chunk for a request, with ties | ||
140 | broken in approximately least-recently-used order. (This strategy | ||
141 | normally maintains low fragmentation.) However, for requests less | ||
142 | than 256bytes, it deviates from best-fit when there is not an | ||
143 | exactly fitting available chunk by preferring to use space adjacent | ||
144 | to that used for the previous small request, as well as by breaking | ||
145 | ties in approximately most-recently-used order. (These enhance | ||
146 | locality of series of small allocations.) And for very large requests | ||
147 | (>= 256Kb by default), it relies on system memory mapping | ||
148 | facilities, if supported. (This helps avoid carrying around and | ||
149 | possibly fragmenting memory used only for large chunks.) | ||
150 | |||
151 | All operations (except malloc_stats and mallinfo) have execution | ||
152 | times that are bounded by a constant factor of the number of bits in | ||
153 | a size_t, not counting any clearing in calloc or copying in realloc, | ||
154 | or actions surrounding MORECORE and MMAP that have times | ||
155 | proportional to the number of non-contiguous regions returned by | ||
156 | system allocation routines, which is often just 1. | ||
157 | |||
158 | The implementation is not very modular and seriously overuses | ||
159 | macros. Perhaps someday all C compilers will do as good a job | ||
160 | inlining modular code as can now be done by brute-force expansion, | ||
161 | but now, enough of them seem not to. | ||
162 | |||
163 | Some compilers issue a lot of warnings about code that is | ||
164 | dead/unreachable only on some platforms, and also about intentional | ||
165 | uses of negation on unsigned types. All known cases of each can be | ||
166 | ignored. | ||
167 | |||
168 | For a longer but out of date high-level description, see | ||
169 | http://gee.cs.oswego.edu/dl/html/malloc.html | ||
170 | |||
171 | * MSPACES | ||
172 | If MSPACES is defined, then in addition to malloc, free, etc., | ||
173 | this file also defines mspace_malloc, mspace_free, etc. These | ||
174 | are versions of malloc routines that take an "mspace" argument | ||
175 | obtained using create_mspace, to control all internal bookkeeping. | ||
176 | If ONLY_MSPACES is defined, only these versions are compiled. | ||
177 | So if you would like to use this allocator for only some allocations, | ||
178 | and your system malloc for others, you can compile with | ||
179 | ONLY_MSPACES and then do something like... | ||
180 | static mspace mymspace = create_mspace(0,0); // for example | ||
181 | #define mymalloc(bytes) mspace_malloc(mymspace, bytes) | ||
182 | |||
183 | (Note: If you only need one instance of an mspace, you can instead | ||
184 | use "USE_DL_PREFIX" to relabel the global malloc.) | ||
185 | |||
186 | You can similarly create thread-local allocators by storing | ||
187 | mspaces as thread-locals. For example: | ||
188 | static __thread mspace tlms = 0; | ||
189 | void* tlmalloc(size_t bytes) { | ||
190 | if (tlms == 0) tlms = create_mspace(0, 0); | ||
191 | return mspace_malloc(tlms, bytes); | ||
192 | } | ||
193 | void tlfree(void* mem) { mspace_free(tlms, mem); } | ||
194 | |||
195 | Unless FOOTERS is defined, each mspace is completely independent. | ||
196 | You cannot allocate from one and free to another (although | ||
197 | conformance is only weakly checked, so usage errors are not always | ||
198 | caught). If FOOTERS is defined, then each chunk carries around a tag | ||
199 | indicating its originating mspace, and frees are directed to their | ||
200 | originating spaces. | ||
201 | |||
202 | ------------------------- Compile-time options --------------------------- | ||
203 | |||
204 | Be careful in setting #define values for numerical constants of type | ||
205 | size_t. On some systems, literal values are not automatically extended | ||
206 | to size_t precision unless they are explicitly casted. | ||
207 | |||
208 | WIN32 default: defined if _WIN32 defined | ||
209 | Defining WIN32 sets up defaults for MS environment and compilers. | ||
210 | Otherwise defaults are for unix. | ||
211 | |||
212 | MALLOC_ALIGNMENT default: (size_t)8 | ||
213 | Controls the minimum alignment for malloc'ed chunks. It must be a | ||
214 | power of two and at least 8, even on machines for which smaller | ||
215 | alignments would suffice. It may be defined as larger than this | ||
216 | though. Note however that code and data structures are optimized for | ||
217 | the case of 8-byte alignment. | ||
218 | |||
219 | MSPACES default: 0 (false) | ||
220 | If true, compile in support for independent allocation spaces. | ||
221 | This is only supported if HAVE_MMAP is true. | ||
222 | |||
223 | ONLY_MSPACES default: 0 (false) | ||
224 | If true, only compile in mspace versions, not regular versions. | ||
225 | |||
226 | USE_LOCKS default: 0 (false) | ||
227 | Causes each call to each public routine to be surrounded with | ||
228 | pthread or WIN32 mutex lock/unlock. (If set true, this can be | ||
229 | overridden on a per-mspace basis for mspace versions.) | ||
230 | |||
231 | FOOTERS default: 0 | ||
232 | If true, provide extra checking and dispatching by placing | ||
233 | information in the footers of allocated chunks. This adds | ||
234 | space and time overhead. | ||
235 | |||
236 | INSECURE default: 0 | ||
237 | If true, omit checks for usage errors and heap space overwrites. | ||
238 | |||
239 | USE_DL_PREFIX default: NOT defined | ||
240 | Causes compiler to prefix all public routines with the string 'dl'. | ||
241 | This can be useful when you only want to use this malloc in one part | ||
242 | of a program, using your regular system malloc elsewhere. | ||
243 | |||
244 | ABORT default: defined as abort() | ||
245 | Defines how to abort on failed checks. On most systems, a failed | ||
246 | check cannot die with an "assert" or even print an informative | ||
247 | message, because the underlying print routines in turn call malloc, | ||
248 | which will fail again. Generally, the best policy is to simply call | ||
249 | abort(). It's not very useful to do more than this because many | ||
250 | errors due to overwriting will show up as address faults (null, odd | ||
251 | addresses etc) rather than malloc-triggered checks, so will also | ||
252 | abort. Also, most compilers know that abort() does not return, so | ||
253 | can better optimize code conditionally calling it. | ||
254 | |||
255 | PROCEED_ON_ERROR default: defined as 0 (false) | ||
256 | Controls whether detected bad addresses cause them to bypassed | ||
257 | rather than aborting. If set, detected bad arguments to free and | ||
258 | realloc are ignored. And all bookkeeping information is zeroed out | ||
259 | upon a detected overwrite of freed heap space, thus losing the | ||
260 | ability to ever return it from malloc again, but enabling the | ||
261 | application to proceed. If PROCEED_ON_ERROR is defined, the | ||
262 | static variable malloc_corruption_error_count is compiled in | ||
263 | and can be examined to see if errors have occurred. This option | ||
264 | generates slower code than the default abort policy. | ||
265 | |||
266 | DEBUG default: NOT defined | ||
267 | The DEBUG setting is mainly intended for people trying to modify | ||
268 | this code or diagnose problems when porting to new platforms. | ||
269 | However, it may also be able to better isolate user errors than just | ||
270 | using runtime checks. The assertions in the check routines spell | ||
271 | out in more detail the assumptions and invariants underlying the | ||
272 | algorithms. The checking is fairly extensive, and will slow down | ||
273 | execution noticeably. Calling malloc_stats or mallinfo with DEBUG | ||
274 | set will attempt to check every non-mmapped allocated and free chunk | ||
275 | in the course of computing the summaries. | ||
276 | |||
277 | ABORT_ON_ASSERT_FAILURE default: defined as 1 (true) | ||
278 | Debugging assertion failures can be nearly impossible if your | ||
279 | version of the assert macro causes malloc to be called, which will | ||
280 | lead to a cascade of further failures, blowing the runtime stack. | ||
281 | ABORT_ON_ASSERT_FAILURE cause assertions failures to call abort(), | ||
282 | which will usually make debugging easier. | ||
283 | |||
284 | MALLOC_FAILURE_ACTION default: sets errno to ENOMEM, or no-op on win32 | ||
285 | The action to take before "return 0" when malloc fails to be able to | ||
286 | return memory because there is none available. | ||
287 | |||
288 | HAVE_MORECORE default: 1 (true) unless win32 or ONLY_MSPACES | ||
289 | True if this system supports sbrk or an emulation of it. | ||
290 | |||
291 | MORECORE default: sbrk | ||
292 | The name of the sbrk-style system routine to call to obtain more | ||
293 | memory. See below for guidance on writing custom MORECORE | ||
294 | functions. The type of the argument to sbrk/MORECORE varies across | ||
295 | systems. It cannot be size_t, because it supports negative | ||
296 | arguments, so it is normally the signed type of the same width as | ||
297 | size_t (sometimes declared as "intptr_t"). It doesn't much matter | ||
298 | though. Internally, we only call it with arguments less than half | ||
299 | the max value of a size_t, which should work across all reasonable | ||
300 | possibilities, although sometimes generating compiler warnings. See | ||
301 | near the end of this file for guidelines for creating a custom | ||
302 | version of MORECORE. | ||
303 | |||
304 | MORECORE_CONTIGUOUS default: 1 (true) | ||
305 | If true, take advantage of fact that consecutive calls to MORECORE | ||
306 | with positive arguments always return contiguous increasing | ||
307 | addresses. This is true of unix sbrk. It does not hurt too much to | ||
308 | set it true anyway, since malloc copes with non-contiguities. | ||
309 | Setting it false when definitely non-contiguous saves time | ||
310 | and possibly wasted space it would take to discover this though. | ||
311 | |||
312 | MORECORE_CANNOT_TRIM default: NOT defined | ||
313 | True if MORECORE cannot release space back to the system when given | ||
314 | negative arguments. This is generally necessary only if you are | ||
315 | using a hand-crafted MORECORE function that cannot handle negative | ||
316 | arguments. | ||
317 | |||
318 | HAVE_MMAP default: 1 (true) | ||
319 | True if this system supports mmap or an emulation of it. If so, and | ||
320 | HAVE_MORECORE is not true, MMAP is used for all system | ||
321 | allocation. If set and HAVE_MORECORE is true as well, MMAP is | ||
322 | primarily used to directly allocate very large blocks. It is also | ||
323 | used as a backup strategy in cases where MORECORE fails to provide | ||
324 | space from system. Note: A single call to MUNMAP is assumed to be | ||
325 | able to unmap memory that may have be allocated using multiple calls | ||
326 | to MMAP, so long as they are adjacent. | ||
327 | |||
328 | HAVE_MREMAP default: 1 on linux, else 0 | ||
329 | If true realloc() uses mremap() to re-allocate large blocks and | ||
330 | extend or shrink allocation spaces. | ||
331 | |||
332 | MMAP_CLEARS default: 1 on unix | ||
333 | True if mmap clears memory so calloc doesn't need to. This is true | ||
334 | for standard unix mmap using /dev/zero. | ||
335 | |||
336 | USE_BUILTIN_FFS default: 0 (i.e., not used) | ||
337 | Causes malloc to use the builtin ffs() function to compute indices. | ||
338 | Some compilers may recognize and intrinsify ffs to be faster than the | ||
339 | supplied C version. Also, the case of x86 using gcc is special-cased | ||
340 | to an asm instruction, so is already as fast as it can be, and so | ||
341 | this setting has no effect. (On most x86s, the asm version is only | ||
342 | slightly faster than the C version.) | ||
343 | |||
344 | malloc_getpagesize default: derive from system includes, or 4096. | ||
345 | The system page size. To the extent possible, this malloc manages | ||
346 | memory from the system in page-size units. This may be (and | ||
347 | usually is) a function rather than a constant. This is ignored | ||
348 | if WIN32, where page size is determined using getSystemInfo during | ||
349 | initialization. | ||
350 | |||
351 | USE_DEV_RANDOM default: 0 (i.e., not used) | ||
352 | Causes malloc to use /dev/random to initialize secure magic seed for | ||
353 | stamping footers. Otherwise, the current time is used. | ||
354 | |||
355 | NO_MALLINFO default: 0 | ||
356 | If defined, don't compile "mallinfo". This can be a simple way | ||
357 | of dealing with mismatches between system declarations and | ||
358 | those in this file. | ||
359 | |||
360 | MALLINFO_FIELD_TYPE default: size_t | ||
361 | The type of the fields in the mallinfo struct. This was originally | ||
362 | defined as "int" in SVID etc, but is more usefully defined as | ||
363 | size_t. The value is used only if HAVE_USR_INCLUDE_MALLOC_H is not set | ||
364 | |||
365 | REALLOC_ZERO_BYTES_FREES default: not defined | ||
366 | This should be set if a call to realloc with zero bytes should | ||
367 | be the same as a call to free. Some people think it should. Otherwise, | ||
368 | since this malloc returns a unique pointer for malloc(0), so does | ||
369 | realloc(p, 0). | ||
370 | |||
371 | LACKS_UNISTD_H, LACKS_FCNTL_H, LACKS_SYS_PARAM_H, LACKS_SYS_MMAN_H | ||
372 | LACKS_STRINGS_H, LACKS_STRING_H, LACKS_SYS_TYPES_H, LACKS_ERRNO_H | ||
373 | LACKS_STDLIB_H default: NOT defined unless on WIN32 | ||
374 | Define these if your system does not have these header files. | ||
375 | You might need to manually insert some of the declarations they provide. | ||
376 | |||
377 | DEFAULT_GRANULARITY default: page size if MORECORE_CONTIGUOUS, | ||
378 | system_info.dwAllocationGranularity in WIN32, | ||
379 | otherwise 64K. | ||
380 | Also settable using mallopt(M_GRANULARITY, x) | ||
381 | The unit for allocating and deallocating memory from the system. On | ||
382 | most systems with contiguous MORECORE, there is no reason to | ||
383 | make this more than a page. However, systems with MMAP tend to | ||
384 | either require or encourage larger granularities. You can increase | ||
385 | this value to prevent system allocation functions to be called so | ||
386 | often, especially if they are slow. The value must be at least one | ||
387 | page and must be a power of two. Setting to 0 causes initialization | ||
388 | to either page size or win32 region size. (Note: In previous | ||
389 | versions of malloc, the equivalent of this option was called | ||
390 | "TOP_PAD") | ||
391 | |||
392 | DEFAULT_TRIM_THRESHOLD default: 2MB | ||
393 | Also settable using mallopt(M_TRIM_THRESHOLD, x) | ||
394 | The maximum amount of unused top-most memory to keep before | ||
395 | releasing via malloc_trim in free(). Automatic trimming is mainly | ||
396 | useful in long-lived programs using contiguous MORECORE. Because | ||
397 | trimming via sbrk can be slow on some systems, and can sometimes be | ||
398 | wasteful (in cases where programs immediately afterward allocate | ||
399 | more large chunks) the value should be high enough so that your | ||
400 | overall system performance would improve by releasing this much | ||
401 | memory. As a rough guide, you might set to a value close to the | ||
402 | average size of a process (program) running on your system. | ||
403 | Releasing this much memory would allow such a process to run in | ||
404 | memory. Generally, it is worth tuning trim thresholds when a | ||
405 | program undergoes phases where several large chunks are allocated | ||
406 | and released in ways that can reuse each other's storage, perhaps | ||
407 | mixed with phases where there are no such chunks at all. The trim | ||
408 | value must be greater than page size to have any useful effect. To | ||
409 | disable trimming completely, you can set to MAX_SIZE_T. Note that the trick | ||
410 | some people use of mallocing a huge space and then freeing it at | ||
411 | program startup, in an attempt to reserve system memory, doesn't | ||
412 | have the intended effect under automatic trimming, since that memory | ||
413 | will immediately be returned to the system. | ||
414 | |||
415 | DEFAULT_MMAP_THRESHOLD default: 256K | ||
416 | Also settable using mallopt(M_MMAP_THRESHOLD, x) | ||
417 | The request size threshold for using MMAP to directly service a | ||
418 | request. Requests of at least this size that cannot be allocated | ||
419 | using already-existing space will be serviced via mmap. (If enough | ||
420 | normal freed space already exists it is used instead.) Using mmap | ||
421 | segregates relatively large chunks of memory so that they can be | ||
422 | individually obtained and released from the host system. A request | ||
423 | serviced through mmap is never reused by any other request (at least | ||
424 | not directly; the system may just so happen to remap successive | ||
425 | requests to the same locations). Segregating space in this way has | ||
426 | the benefits that: Mmapped space can always be individually released | ||
427 | back to the system, which helps keep the system level memory demands | ||
428 | of a long-lived program low. Also, mapped memory doesn't become | ||
429 | `locked' between other chunks, as can happen with normally allocated | ||
430 | chunks, which means that even trimming via malloc_trim would not | ||
431 | release them. However, it has the disadvantage that the space | ||
432 | cannot be reclaimed, consolidated, and then used to service later | ||
433 | requests, as happens with normal chunks. The advantages of mmap | ||
434 | nearly always outweigh disadvantages for "large" chunks, but the | ||
435 | value of "large" may vary across systems. The default is an | ||
436 | empirically derived value that works well in most systems. You can | ||
437 | disable mmap by setting to MAX_SIZE_T. | ||
438 | |||
439 | */ | ||
440 | |||
441 | #ifndef WIN32 | ||
442 | #ifdef _WIN32 | ||
443 | #define WIN32 1 | ||
444 | #endif /* _WIN32 */ | ||
445 | #endif /* WIN32 */ | ||
446 | #ifdef WIN32 | ||
447 | #define WIN32_LEAN_AND_MEAN | ||
448 | #include <windows.h> | ||
449 | #define HAVE_MMAP 1 | ||
450 | #define HAVE_MORECORE 0 | ||
451 | #define LACKS_UNISTD_H | ||
452 | #define LACKS_SYS_PARAM_H | ||
453 | #define LACKS_SYS_MMAN_H | ||
454 | #define LACKS_STRING_H | ||
455 | #define LACKS_STRINGS_H | ||
456 | #define LACKS_SYS_TYPES_H | ||
457 | #define LACKS_ERRNO_H | ||
458 | #define MALLOC_FAILURE_ACTION | ||
459 | #define MMAP_CLEARS 0 /* WINCE and some others apparently don't clear */ | ||
460 | #endif /* WIN32 */ | ||
461 | |||
462 | #if defined(DARWIN) || defined(_DARWIN) | ||
463 | /* Mac OSX docs advise not to use sbrk; it seems better to use mmap */ | ||
464 | #ifndef HAVE_MORECORE | ||
465 | #define HAVE_MORECORE 0 | ||
466 | #define HAVE_MMAP 1 | ||
467 | #endif /* HAVE_MORECORE */ | ||
468 | #endif /* DARWIN */ | ||
469 | |||
470 | #ifndef LACKS_SYS_TYPES_H | ||
471 | #include <sys/types.h> /* For size_t */ | ||
472 | #endif /* LACKS_SYS_TYPES_H */ | ||
473 | |||
474 | /* The maximum possible size_t value has all bits set */ | ||
475 | #define MAX_SIZE_T (~(size_t)0) | ||
476 | |||
477 | #ifndef ONLY_MSPACES | ||
478 | #define ONLY_MSPACES 0 | ||
479 | #endif /* ONLY_MSPACES */ | ||
480 | #ifndef MSPACES | ||
481 | #if ONLY_MSPACES | ||
482 | #define MSPACES 1 | ||
483 | #else /* ONLY_MSPACES */ | ||
484 | #define MSPACES 0 | ||
485 | #endif /* ONLY_MSPACES */ | ||
486 | #endif /* MSPACES */ | ||
487 | #ifndef MALLOC_ALIGNMENT | ||
488 | #define MALLOC_ALIGNMENT ((size_t)8U) | ||
489 | #endif /* MALLOC_ALIGNMENT */ | ||
490 | #ifndef FOOTERS | ||
491 | #define FOOTERS 0 | ||
492 | #endif /* FOOTERS */ | ||
493 | #ifndef ABORT | ||
494 | #define ABORT abort() | ||
495 | #endif /* ABORT */ | ||
496 | #ifndef ABORT_ON_ASSERT_FAILURE | ||
497 | #define ABORT_ON_ASSERT_FAILURE 1 | ||
498 | #endif /* ABORT_ON_ASSERT_FAILURE */ | ||
499 | #ifndef PROCEED_ON_ERROR | ||
500 | #define PROCEED_ON_ERROR 0 | ||
501 | #endif /* PROCEED_ON_ERROR */ | ||
502 | #ifndef USE_LOCKS | ||
503 | #define USE_LOCKS 0 | ||
504 | #endif /* USE_LOCKS */ | ||
505 | #ifndef INSECURE | ||
506 | #define INSECURE 0 | ||
507 | #endif /* INSECURE */ | ||
508 | #ifndef HAVE_MMAP | ||
509 | #define HAVE_MMAP 1 | ||
510 | #endif /* HAVE_MMAP */ | ||
511 | #ifndef MMAP_CLEARS | ||
512 | #define MMAP_CLEARS 1 | ||
513 | #endif /* MMAP_CLEARS */ | ||
514 | #ifndef HAVE_MREMAP | ||
515 | #ifdef linux | ||
516 | #define HAVE_MREMAP 1 | ||
517 | #else /* linux */ | ||
518 | #define HAVE_MREMAP 0 | ||
519 | #endif /* linux */ | ||
520 | #endif /* HAVE_MREMAP */ | ||
521 | #ifndef MALLOC_FAILURE_ACTION | ||
522 | #define MALLOC_FAILURE_ACTION errno = ENOMEM; | ||
523 | #endif /* MALLOC_FAILURE_ACTION */ | ||
524 | #ifndef HAVE_MORECORE | ||
525 | #if ONLY_MSPACES | ||
526 | #define HAVE_MORECORE 0 | ||
527 | #else /* ONLY_MSPACES */ | ||
528 | #define HAVE_MORECORE 1 | ||
529 | #endif /* ONLY_MSPACES */ | ||
530 | #endif /* HAVE_MORECORE */ | ||
531 | #if !HAVE_MORECORE | ||
532 | #define MORECORE_CONTIGUOUS 0 | ||
533 | #else /* !HAVE_MORECORE */ | ||
534 | #ifndef MORECORE | ||
535 | #define MORECORE sbrk | ||
536 | #endif /* MORECORE */ | ||
537 | #ifndef MORECORE_CONTIGUOUS | ||
538 | #define MORECORE_CONTIGUOUS 1 | ||
539 | #endif /* MORECORE_CONTIGUOUS */ | ||
540 | #endif /* HAVE_MORECORE */ | ||
541 | #ifndef DEFAULT_GRANULARITY | ||
542 | #if MORECORE_CONTIGUOUS | ||
543 | #define DEFAULT_GRANULARITY (0) /* 0 means to compute in init_mparams */ | ||
544 | #else /* MORECORE_CONTIGUOUS */ | ||
545 | #define DEFAULT_GRANULARITY ((size_t)64U * (size_t)1024U) | ||
546 | #endif /* MORECORE_CONTIGUOUS */ | ||
547 | #endif /* DEFAULT_GRANULARITY */ | ||
548 | #ifndef DEFAULT_TRIM_THRESHOLD | ||
549 | #ifndef MORECORE_CANNOT_TRIM | ||
550 | #define DEFAULT_TRIM_THRESHOLD ((size_t)2U * (size_t)1024U * (size_t)1024U) | ||
551 | #else /* MORECORE_CANNOT_TRIM */ | ||
552 | #define DEFAULT_TRIM_THRESHOLD MAX_SIZE_T | ||
553 | #endif /* MORECORE_CANNOT_TRIM */ | ||
554 | #endif /* DEFAULT_TRIM_THRESHOLD */ | ||
555 | #ifndef DEFAULT_MMAP_THRESHOLD | ||
556 | #if HAVE_MMAP | ||
557 | #define DEFAULT_MMAP_THRESHOLD ((size_t)256U * (size_t)1024U) | ||
558 | #else /* HAVE_MMAP */ | ||
559 | #define DEFAULT_MMAP_THRESHOLD MAX_SIZE_T | ||
560 | #endif /* HAVE_MMAP */ | ||
561 | #endif /* DEFAULT_MMAP_THRESHOLD */ | ||
562 | #ifndef USE_BUILTIN_FFS | ||
563 | #define USE_BUILTIN_FFS 0 | ||
564 | #endif /* USE_BUILTIN_FFS */ | ||
565 | #ifndef USE_DEV_RANDOM | ||
566 | #define USE_DEV_RANDOM 0 | ||
567 | #endif /* USE_DEV_RANDOM */ | ||
568 | #ifndef NO_MALLINFO | ||
569 | #define NO_MALLINFO 0 | ||
570 | #endif /* NO_MALLINFO */ | ||
571 | #ifndef MALLINFO_FIELD_TYPE | ||
572 | #define MALLINFO_FIELD_TYPE size_t | ||
573 | #endif /* MALLINFO_FIELD_TYPE */ | ||
574 | |||
575 | /* | ||
576 | mallopt tuning options. SVID/XPG defines four standard parameter | ||
577 | numbers for mallopt, normally defined in malloc.h. None of these | ||
578 | are used in this malloc, so setting them has no effect. But this | ||
579 | malloc does support the following options. | ||
580 | */ | ||
581 | |||
582 | #define M_TRIM_THRESHOLD (-1) | ||
583 | #define M_GRANULARITY (-2) | ||
584 | #define M_MMAP_THRESHOLD (-3) | ||
585 | |||
586 | /* ------------------------ Mallinfo declarations ------------------------ */ | ||
587 | |||
588 | #if !NO_MALLINFO | ||
589 | /* | ||
590 | This version of malloc supports the standard SVID/XPG mallinfo | ||
591 | routine that returns a struct containing usage properties and | ||
592 | statistics. It should work on any system that has a | ||
593 | /usr/include/malloc.h defining struct mallinfo. The main | ||
594 | declaration needed is the mallinfo struct that is returned (by-copy) | ||
595 | by mallinfo(). The malloinfo struct contains a bunch of fields that | ||
596 | are not even meaningful in this version of malloc. These fields are | ||
597 | are instead filled by mallinfo() with other numbers that might be of | ||
598 | interest. | ||
599 | |||
600 | HAVE_USR_INCLUDE_MALLOC_H should be set if you have a | ||
601 | /usr/include/malloc.h file that includes a declaration of struct | ||
602 | mallinfo. If so, it is included; else a compliant version is | ||
603 | declared below. These must be precisely the same for mallinfo() to | ||
604 | work. The original SVID version of this struct, defined on most | ||
605 | systems with mallinfo, declares all fields as ints. But some others | ||
606 | define as unsigned long. If your system defines the fields using a | ||
607 | type of different width than listed here, you MUST #include your | ||
608 | system version and #define HAVE_USR_INCLUDE_MALLOC_H. | ||
609 | */ | ||
610 | |||
611 | /* #define HAVE_USR_INCLUDE_MALLOC_H */ | ||
612 | |||
613 | #ifdef HAVE_USR_INCLUDE_MALLOC_H | ||
614 | #include "/usr/include/malloc.h" | ||
615 | #else /* HAVE_USR_INCLUDE_MALLOC_H */ | ||
616 | |||
617 | struct mallinfo { | ||
618 | MALLINFO_FIELD_TYPE arena; /* non-mmapped space allocated from system */ | ||
619 | MALLINFO_FIELD_TYPE ordblks; /* number of free chunks */ | ||
620 | MALLINFO_FIELD_TYPE smblks; /* always 0 */ | ||
621 | MALLINFO_FIELD_TYPE hblks; /* always 0 */ | ||
622 | MALLINFO_FIELD_TYPE hblkhd; /* space in mmapped regions */ | ||
623 | MALLINFO_FIELD_TYPE usmblks; /* maximum total allocated space */ | ||
624 | MALLINFO_FIELD_TYPE fsmblks; /* always 0 */ | ||
625 | MALLINFO_FIELD_TYPE uordblks; /* total allocated space */ | ||
626 | MALLINFO_FIELD_TYPE fordblks; /* total free space */ | ||
627 | MALLINFO_FIELD_TYPE keepcost; /* releasable (via malloc_trim) space */ | ||
628 | }; | ||
629 | |||
630 | #endif /* HAVE_USR_INCLUDE_MALLOC_H */ | ||
631 | #endif /* NO_MALLINFO */ | ||
632 | |||
633 | #ifdef __cplusplus | ||
634 | extern "C" { | ||
635 | #endif /* __cplusplus */ | ||
636 | |||
637 | #if !ONLY_MSPACES | ||
638 | |||
639 | /* ------------------- Declarations of public routines ------------------- */ | ||
640 | |||
641 | #ifndef USE_DL_PREFIX | ||
642 | #define dlcalloc calloc | ||
643 | #define dlfree free | ||
644 | #define dlmalloc malloc | ||
645 | #define dlmemalign memalign | ||
646 | #define dlrealloc realloc | ||
647 | #define dlvalloc valloc | ||
648 | #define dlpvalloc pvalloc | ||
649 | #define dlmallinfo mallinfo | ||
650 | #define dlmallopt mallopt | ||
651 | #define dlmalloc_trim malloc_trim | ||
652 | #define dlmalloc_stats malloc_stats | ||
653 | #define dlmalloc_usable_size malloc_usable_size | ||
654 | #define dlmalloc_footprint malloc_footprint | ||
655 | #define dlmalloc_max_footprint malloc_max_footprint | ||
656 | #define dlindependent_calloc independent_calloc | ||
657 | #define dlindependent_comalloc independent_comalloc | ||
658 | #endif /* USE_DL_PREFIX */ | ||
659 | |||
660 | |||
661 | /* | ||
662 | malloc(size_t n) | ||
663 | Returns a pointer to a newly allocated chunk of at least n bytes, or | ||
664 | null if no space is available, in which case errno is set to ENOMEM | ||
665 | on ANSI C systems. | ||
666 | |||
667 | If n is zero, malloc returns a minimum-sized chunk. (The minimum | ||
668 | size is 16 bytes on most 32bit systems, and 32 bytes on 64bit | ||
669 | systems.) Note that size_t is an unsigned type, so calls with | ||
670 | arguments that would be negative if signed are interpreted as | ||
671 | requests for huge amounts of space, which will often fail. The | ||
672 | maximum supported value of n differs across systems, but is in all | ||
673 | cases less than the maximum representable value of a size_t. | ||
674 | */ | ||
675 | void* dlmalloc(size_t); | ||
676 | |||
677 | /* | ||
678 | free(void* p) | ||
679 | Releases the chunk of memory pointed to by p, that had been previously | ||
680 | allocated using malloc or a related routine such as realloc. | ||
681 | It has no effect if p is null. If p was not malloced or already | ||
682 | freed, free(p) will by default cause the current program to abort. | ||
683 | */ | ||
684 | void dlfree(void*); | ||
685 | |||
686 | /* | ||
687 | calloc(size_t n_elements, size_t element_size); | ||
688 | Returns a pointer to n_elements * element_size bytes, with all locations | ||
689 | set to zero. | ||
690 | */ | ||
691 | void* dlcalloc(size_t, size_t); | ||
692 | |||
693 | /* | ||
694 | realloc(void* p, size_t n) | ||
695 | Returns a pointer to a chunk of size n that contains the same data | ||
696 | as does chunk p up to the minimum of (n, p's size) bytes, or null | ||
697 | if no space is available. | ||
698 | |||
699 | The returned pointer may or may not be the same as p. The algorithm | ||
700 | prefers extending p in most cases when possible, otherwise it | ||
701 | employs the equivalent of a malloc-copy-free sequence. | ||
702 | |||
703 | If p is null, realloc is equivalent to malloc. | ||
704 | |||
705 | If space is not available, realloc returns null, errno is set (if on | ||
706 | ANSI) and p is NOT freed. | ||
707 | |||
708 | if n is for fewer bytes than already held by p, the newly unused | ||
709 | space is lopped off and freed if possible. realloc with a size | ||
710 | argument of zero (re)allocates a minimum-sized chunk. | ||
711 | |||
712 | The old unix realloc convention of allowing the last-free'd chunk | ||
713 | to be used as an argument to realloc is not supported. | ||
714 | */ | ||
715 | |||
716 | void* dlrealloc(void*, size_t); | ||
717 | |||
718 | /* | ||
719 | memalign(size_t alignment, size_t n); | ||
720 | Returns a pointer to a newly allocated chunk of n bytes, aligned | ||
721 | in accord with the alignment argument. | ||
722 | |||
723 | The alignment argument should be a power of two. If the argument is | ||
724 | not a power of two, the nearest greater power is used. | ||
725 | 8-byte alignment is guaranteed by normal malloc calls, so don't | ||
726 | bother calling memalign with an argument of 8 or less. | ||
727 | |||
728 | Overreliance on memalign is a sure way to fragment space. | ||
729 | */ | ||
730 | void* dlmemalign(size_t, size_t); | ||
731 | |||
732 | /* | ||
733 | valloc(size_t n); | ||
734 | Equivalent to memalign(pagesize, n), where pagesize is the page | ||
735 | size of the system. If the pagesize is unknown, 4096 is used. | ||
736 | */ | ||
737 | void* dlvalloc(size_t); | ||
738 | |||
739 | /* | ||
740 | mallopt(int parameter_number, int parameter_value) | ||
741 | Sets tunable parameters The format is to provide a | ||
742 | (parameter-number, parameter-value) pair. mallopt then sets the | ||
743 | corresponding parameter to the argument value if it can (i.e., so | ||
744 | long as the value is meaningful), and returns 1 if successful else | ||
745 | 0. SVID/XPG/ANSI defines four standard param numbers for mallopt, | ||
746 | normally defined in malloc.h. None of these are use in this malloc, | ||
747 | so setting them has no effect. But this malloc also supports other | ||
748 | options in mallopt. See below for details. Briefly, supported | ||
749 | parameters are as follows (listed defaults are for "typical" | ||
750 | configurations). | ||
751 | |||
752 | Symbol param # default allowed param values | ||
753 | M_TRIM_THRESHOLD -1 2*1024*1024 any (MAX_SIZE_T disables) | ||
754 | M_GRANULARITY -2 page size any power of 2 >= page size | ||
755 | M_MMAP_THRESHOLD -3 256*1024 any (or 0 if no MMAP support) | ||
756 | */ | ||
757 | int dlmallopt(int, int); | ||
758 | |||
759 | /* | ||
760 | malloc_footprint(); | ||
761 | Returns the number of bytes obtained from the system. The total | ||
762 | number of bytes allocated by malloc, realloc etc., is less than this | ||
763 | value. Unlike mallinfo, this function returns only a precomputed | ||
764 | result, so can be called frequently to monitor memory consumption. | ||
765 | Even if locks are otherwise defined, this function does not use them, | ||
766 | so results might not be up to date. | ||
767 | */ | ||
768 | size_t dlmalloc_footprint(void); | ||
769 | |||
770 | /* | ||
771 | malloc_max_footprint(); | ||
772 | Returns the maximum number of bytes obtained from the system. This | ||
773 | value will be greater than current footprint if deallocated space | ||
774 | has been reclaimed by the system. The peak number of bytes allocated | ||
775 | by malloc, realloc etc., is less than this value. Unlike mallinfo, | ||
776 | this function returns only a precomputed result, so can be called | ||
777 | frequently to monitor memory consumption. Even if locks are | ||
778 | otherwise defined, this function does not use them, so results might | ||
779 | not be up to date. | ||
780 | */ | ||
781 | size_t dlmalloc_max_footprint(void); | ||
782 | |||
783 | #if !NO_MALLINFO | ||
784 | /* | ||
785 | mallinfo() | ||
786 | Returns (by copy) a struct containing various summary statistics: | ||
787 | |||
788 | arena: current total non-mmapped bytes allocated from system | ||
789 | ordblks: the number of free chunks | ||
790 | smblks: always zero. | ||
791 | hblks: current number of mmapped regions | ||
792 | hblkhd: total bytes held in mmapped regions | ||
793 | usmblks: the maximum total allocated space. This will be greater | ||
794 | than current total if trimming has occurred. | ||
795 | fsmblks: always zero | ||
796 | uordblks: current total allocated space (normal or mmapped) | ||
797 | fordblks: total free space | ||
798 | keepcost: the maximum number of bytes that could ideally be released | ||
799 | back to system via malloc_trim. ("ideally" means that | ||
800 | it ignores page restrictions etc.) | ||
801 | |||
802 | Because these fields are ints, but internal bookkeeping may | ||
803 | be kept as longs, the reported values may wrap around zero and | ||
804 | thus be inaccurate. | ||
805 | */ | ||
806 | struct mallinfo dlmallinfo(void); | ||
807 | #endif /* NO_MALLINFO */ | ||
808 | |||
809 | /* | ||
810 | independent_calloc(size_t n_elements, size_t element_size, void* chunks[]); | ||
811 | |||
812 | independent_calloc is similar to calloc, but instead of returning a | ||
813 | single cleared space, it returns an array of pointers to n_elements | ||
814 | independent elements that can hold contents of size elem_size, each | ||
815 | of which starts out cleared, and can be independently freed, | ||
816 | realloc'ed etc. The elements are guaranteed to be adjacently | ||
817 | allocated (this is not guaranteed to occur with multiple callocs or | ||
818 | mallocs), which may also improve cache locality in some | ||
819 | applications. | ||
820 | |||
821 | The "chunks" argument is optional (i.e., may be null, which is | ||
822 | probably the most typical usage). If it is null, the returned array | ||
823 | is itself dynamically allocated and should also be freed when it is | ||
824 | no longer needed. Otherwise, the chunks array must be of at least | ||
825 | n_elements in length. It is filled in with the pointers to the | ||
826 | chunks. | ||
827 | |||
828 | In either case, independent_calloc returns this pointer array, or | ||
829 | null if the allocation failed. If n_elements is zero and "chunks" | ||
830 | is null, it returns a chunk representing an array with zero elements | ||
831 | (which should be freed if not wanted). | ||
832 | |||
833 | Each element must be individually freed when it is no longer | ||
834 | needed. If you'd like to instead be able to free all at once, you | ||
835 | should instead use regular calloc and assign pointers into this | ||
836 | space to represent elements. (In this case though, you cannot | ||
837 | independently free elements.) | ||
838 | |||
839 | independent_calloc simplifies and speeds up implementations of many | ||
840 | kinds of pools. It may also be useful when constructing large data | ||
841 | structures that initially have a fixed number of fixed-sized nodes, | ||
842 | but the number is not known at compile time, and some of the nodes | ||
843 | may later need to be freed. For example: | ||
844 | |||
845 | struct Node { int item; struct Node* next; }; | ||
846 | |||
847 | struct Node* build_list() { | ||
848 | struct Node** pool; | ||
849 | int n = read_number_of_nodes_needed(); | ||
850 | if (n <= 0) return 0; | ||
851 | pool = (struct Node**)(independent_calloc(n, sizeof(struct Node), 0); | ||
852 | if (pool == 0) die(); | ||
853 | // organize into a linked list... | ||
854 | struct Node* first = pool[0]; | ||
855 | for (i = 0; i < n-1; ++i) | ||
856 | pool[i]->next = pool[i+1]; | ||
857 | free(pool); // Can now free the array (or not, if it is needed later) | ||
858 | return first; | ||
859 | } | ||
860 | */ | ||
861 | void** dlindependent_calloc(size_t, size_t, void**); | ||
862 | |||
863 | /* | ||
864 | independent_comalloc(size_t n_elements, size_t sizes[], void* chunks[]); | ||
865 | |||
866 | independent_comalloc allocates, all at once, a set of n_elements | ||
867 | chunks with sizes indicated in the "sizes" array. It returns | ||
868 | an array of pointers to these elements, each of which can be | ||
869 | independently freed, realloc'ed etc. The elements are guaranteed to | ||
870 | be adjacently allocated (this is not guaranteed to occur with | ||
871 | multiple callocs or mallocs), which may also improve cache locality | ||
872 | in some applications. | ||
873 | |||
874 | The "chunks" argument is optional (i.e., may be null). If it is null | ||
875 | the returned array is itself dynamically allocated and should also | ||
876 | be freed when it is no longer needed. Otherwise, the chunks array | ||
877 | must be of at least n_elements in length. It is filled in with the | ||
878 | pointers to the chunks. | ||
879 | |||
880 | In either case, independent_comalloc returns this pointer array, or | ||
881 | null if the allocation failed. If n_elements is zero and chunks is | ||
882 | null, it returns a chunk representing an array with zero elements | ||
883 | (which should be freed if not wanted). | ||
884 | |||
885 | Each element must be individually freed when it is no longer | ||
886 | needed. If you'd like to instead be able to free all at once, you | ||
887 | should instead use a single regular malloc, and assign pointers at | ||
888 | particular offsets in the aggregate space. (In this case though, you | ||
889 | cannot independently free elements.) | ||
890 | |||
891 | independent_comallac differs from independent_calloc in that each | ||
892 | element may have a different size, and also that it does not | ||
893 | automatically clear elements. | ||
894 | |||
895 | independent_comalloc can be used to speed up allocation in cases | ||
896 | where several structs or objects must always be allocated at the | ||
897 | same time. For example: | ||
898 | |||
899 | struct Head { ... } | ||
900 | struct Foot { ... } | ||
901 | |||
902 | void send_message(char* msg) { | ||
903 | int msglen = strlen(msg); | ||
904 | size_t sizes[3] = { sizeof(struct Head), msglen, sizeof(struct Foot) }; | ||
905 | void* chunks[3]; | ||
906 | if (independent_comalloc(3, sizes, chunks) == 0) | ||
907 | die(); | ||
908 | struct Head* head = (struct Head*)(chunks[0]); | ||
909 | char* body = (char*)(chunks[1]); | ||
910 | struct Foot* foot = (struct Foot*)(chunks[2]); | ||
911 | // ... | ||
912 | } | ||
913 | |||
914 | In general though, independent_comalloc is worth using only for | ||
915 | larger values of n_elements. For small values, you probably won't | ||
916 | detect enough difference from series of malloc calls to bother. | ||
917 | |||
918 | Overuse of independent_comalloc can increase overall memory usage, | ||
919 | since it cannot reuse existing noncontiguous small chunks that | ||
920 | might be available for some of the elements. | ||
921 | */ | ||
922 | void** dlindependent_comalloc(size_t, size_t*, void**); | ||
923 | |||
924 | |||
925 | /* | ||
926 | pvalloc(size_t n); | ||
927 | Equivalent to valloc(minimum-page-that-holds(n)), that is, | ||
928 | round up n to nearest pagesize. | ||
929 | */ | ||
930 | void* dlpvalloc(size_t); | ||
931 | |||
932 | /* | ||
933 | malloc_trim(size_t pad); | ||
934 | |||
935 | If possible, gives memory back to the system (via negative arguments | ||
936 | to sbrk) if there is unused memory at the `high' end of the malloc | ||
937 | pool or in unused MMAP segments. You can call this after freeing | ||
938 | large blocks of memory to potentially reduce the system-level memory | ||
939 | requirements of a program. However, it cannot guarantee to reduce | ||
940 | memory. Under some allocation patterns, some large free blocks of | ||
941 | memory will be locked between two used chunks, so they cannot be | ||
942 | given back to the system. | ||
943 | |||
944 | The `pad' argument to malloc_trim represents the amount of free | ||
945 | trailing space to leave untrimmed. If this argument is zero, only | ||
946 | the minimum amount of memory to maintain internal data structures | ||
947 | will be left. Non-zero arguments can be supplied to maintain enough | ||
948 | trailing space to service future expected allocations without having | ||
949 | to re-obtain memory from the system. | ||
950 | |||
951 | Malloc_trim returns 1 if it actually released any memory, else 0. | ||
952 | */ | ||
953 | int dlmalloc_trim(size_t); | ||
954 | |||
955 | /* | ||
956 | malloc_usable_size(void* p); | ||
957 | |||
958 | Returns the number of bytes you can actually use in | ||
959 | an allocated chunk, which may be more than you requested (although | ||
960 | often not) due to alignment and minimum size constraints. | ||
961 | You can use this many bytes without worrying about | ||
962 | overwriting other allocated objects. This is not a particularly great | ||
963 | programming practice. malloc_usable_size can be more useful in | ||
964 | debugging and assertions, for example: | ||
965 | |||
966 | p = malloc(n); | ||
967 | assert(malloc_usable_size(p) >= 256); | ||
968 | */ | ||
969 | size_t dlmalloc_usable_size(void*); | ||
970 | |||
971 | /* | ||
972 | malloc_stats(); | ||
973 | Prints on stderr the amount of space obtained from the system (both | ||
974 | via sbrk and mmap), the maximum amount (which may be more than | ||
975 | current if malloc_trim and/or munmap got called), and the current | ||
976 | number of bytes allocated via malloc (or realloc, etc) but not yet | ||
977 | freed. Note that this is the number of bytes allocated, not the | ||
978 | number requested. It will be larger than the number requested | ||
979 | because of alignment and bookkeeping overhead. Because it includes | ||
980 | alignment wastage as being in use, this figure may be greater than | ||
981 | zero even when no user-level chunks are allocated. | ||
982 | |||
983 | The reported current and maximum system memory can be inaccurate if | ||
984 | a program makes other calls to system memory allocation functions | ||
985 | (normally sbrk) outside of malloc. | ||
986 | |||
987 | malloc_stats prints only the most commonly interesting statistics. | ||
988 | More information can be obtained by calling mallinfo. | ||
989 | */ | ||
990 | void dlmalloc_stats(void); | ||
991 | |||
992 | #endif /* ONLY_MSPACES */ | ||
993 | |||
994 | #if MSPACES | ||
995 | |||
996 | /* | ||
997 | mspace is an opaque type representing an independent | ||
998 | region of space that supports mspace_malloc, etc. | ||
999 | */ | ||
1000 | typedef void* mspace; | ||
1001 | |||
1002 | /* | ||
1003 | create_mspace creates and returns a new independent space with the | ||
1004 | given initial capacity, or, if 0, the default granularity size. It | ||
1005 | returns null if there is no system memory available to create the | ||
1006 | space. If argument locked is non-zero, the space uses a separate | ||
1007 | lock to control access. The capacity of the space will grow | ||
1008 | dynamically as needed to service mspace_malloc requests. You can | ||
1009 | control the sizes of incremental increases of this space by | ||
1010 | compiling with a different DEFAULT_GRANULARITY or dynamically | ||
1011 | setting with mallopt(M_GRANULARITY, value). | ||
1012 | */ | ||
1013 | mspace create_mspace(size_t capacity, int locked); | ||
1014 | |||
1015 | /* | ||
1016 | destroy_mspace destroys the given space, and attempts to return all | ||
1017 | of its memory back to the system, returning the total number of | ||
1018 | bytes freed. After destruction, the results of access to all memory | ||
1019 | used by the space become undefined. | ||
1020 | */ | ||
1021 | size_t destroy_mspace(mspace msp); | ||
1022 | |||
1023 | /* | ||
1024 | create_mspace_with_base uses the memory supplied as the initial base | ||
1025 | of a new mspace. Part (less than 128*sizeof(size_t) bytes) of this | ||
1026 | space is used for bookkeeping, so the capacity must be at least this | ||
1027 | large. (Otherwise 0 is returned.) When this initial space is | ||
1028 | exhausted, additional memory will be obtained from the system. | ||
1029 | Destroying this space will deallocate all additionally allocated | ||
1030 | space (if possible) but not the initial base. | ||
1031 | */ | ||
1032 | mspace create_mspace_with_base(void* base, size_t capacity, int locked); | ||
1033 | |||
1034 | /* | ||
1035 | mspace_malloc behaves as malloc, but operates within | ||
1036 | the given space. | ||
1037 | */ | ||
1038 | void* mspace_malloc(mspace msp, size_t bytes); | ||
1039 | |||
1040 | /* | ||
1041 | mspace_free behaves as free, but operates within | ||
1042 | the given space. | ||
1043 | |||
1044 | If compiled with FOOTERS==1, mspace_free is not actually needed. | ||
1045 | free may be called instead of mspace_free because freed chunks from | ||
1046 | any space are handled by their originating spaces. | ||
1047 | */ | ||
1048 | void mspace_free(mspace msp, void* mem); | ||
1049 | |||
1050 | /* | ||
1051 | mspace_realloc behaves as realloc, but operates within | ||
1052 | the given space. | ||
1053 | |||
1054 | If compiled with FOOTERS==1, mspace_realloc is not actually | ||
1055 | needed. realloc may be called instead of mspace_realloc because | ||
1056 | realloced chunks from any space are handled by their originating | ||
1057 | spaces. | ||
1058 | */ | ||
1059 | void* mspace_realloc(mspace msp, void* mem, size_t newsize); | ||
1060 | |||
1061 | /* | ||
1062 | mspace_calloc behaves as calloc, but operates within | ||
1063 | the given space. | ||
1064 | */ | ||
1065 | void* mspace_calloc(mspace msp, size_t n_elements, size_t elem_size); | ||
1066 | |||
1067 | /* | ||
1068 | mspace_memalign behaves as memalign, but operates within | ||
1069 | the given space. | ||
1070 | */ | ||
1071 | void* mspace_memalign(mspace msp, size_t alignment, size_t bytes); | ||
1072 | |||
1073 | /* | ||
1074 | mspace_independent_calloc behaves as independent_calloc, but | ||
1075 | operates within the given space. | ||
1076 | */ | ||
1077 | void** mspace_independent_calloc(mspace msp, size_t n_elements, | ||
1078 | size_t elem_size, void* chunks[]); | ||
1079 | |||
1080 | /* | ||
1081 | mspace_independent_comalloc behaves as independent_comalloc, but | ||
1082 | operates within the given space. | ||
1083 | */ | ||
1084 | void** mspace_independent_comalloc(mspace msp, size_t n_elements, | ||
1085 | size_t sizes[], void* chunks[]); | ||
1086 | |||
1087 | /* | ||
1088 | mspace_footprint() returns the number of bytes obtained from the | ||
1089 | system for this space. | ||
1090 | */ | ||
1091 | size_t mspace_footprint(mspace msp); | ||
1092 | |||
1093 | /* | ||
1094 | mspace_max_footprint() returns the peak number of bytes obtained from the | ||
1095 | system for this space. | ||
1096 | */ | ||
1097 | size_t mspace_max_footprint(mspace msp); | ||
1098 | |||
1099 | |||
1100 | #if !NO_MALLINFO | ||
1101 | /* | ||
1102 | mspace_mallinfo behaves as mallinfo, but reports properties of | ||
1103 | the given space. | ||
1104 | */ | ||
1105 | struct mallinfo mspace_mallinfo(mspace msp); | ||
1106 | #endif /* NO_MALLINFO */ | ||
1107 | |||
1108 | /* | ||
1109 | mspace_malloc_stats behaves as malloc_stats, but reports | ||
1110 | properties of the given space. | ||
1111 | */ | ||
1112 | void mspace_malloc_stats(mspace msp); | ||
1113 | |||
1114 | /* | ||
1115 | mspace_trim behaves as malloc_trim, but | ||
1116 | operates within the given space. | ||
1117 | */ | ||
1118 | int mspace_trim(mspace msp, size_t pad); | ||
1119 | |||
1120 | /* | ||
1121 | An alias for mallopt. | ||
1122 | */ | ||
1123 | int mspace_mallopt(int, int); | ||
1124 | |||
1125 | #endif /* MSPACES */ | ||
1126 | |||
1127 | #ifdef __cplusplus | ||
1128 | }; /* end of extern "C" */ | ||
1129 | #endif /* __cplusplus */ | ||
1130 | |||
1131 | /* | ||
1132 | ======================================================================== | ||
1133 | To make a fully customizable malloc.h header file, cut everything | ||
1134 | above this line, put into file malloc.h, edit to suit, and #include it | ||
1135 | on the next line, as well as in programs that use this malloc. | ||
1136 | ======================================================================== | ||
1137 | */ | ||
1138 | |||
1139 | // #include "malloc.h" | ||
1140 | |||
1141 | /*------------------------------ internal #includes ---------------------- */ | ||
1142 | |||
1143 | #ifdef WIN32 | ||
1144 | #pragma warning( disable : 4146 ) /* no "unsigned" warnings */ | ||
1145 | #endif /* WIN32 */ | ||
1146 | |||
1147 | #include <stdio.h> /* for printing in malloc_stats */ | ||
1148 | |||
1149 | #ifndef LACKS_ERRNO_H | ||
1150 | #include <errno.h> /* for MALLOC_FAILURE_ACTION */ | ||
1151 | #endif /* LACKS_ERRNO_H */ | ||
1152 | #if FOOTERS | ||
1153 | #include <time.h> /* for magic initialization */ | ||
1154 | #endif /* FOOTERS */ | ||
1155 | #ifndef LACKS_STDLIB_H | ||
1156 | #include <stdlib.h> /* for abort() */ | ||
1157 | #endif /* LACKS_STDLIB_H */ | ||
1158 | #ifdef DEBUG | ||
1159 | #if ABORT_ON_ASSERT_FAILURE | ||
1160 | #define assert(x) if(!(x)) ABORT | ||
1161 | #else /* ABORT_ON_ASSERT_FAILURE */ | ||
1162 | #include <assert.h> | ||
1163 | #endif /* ABORT_ON_ASSERT_FAILURE */ | ||
1164 | #else /* DEBUG */ | ||
1165 | #define assert(x) | ||
1166 | #endif /* DEBUG */ | ||
1167 | #ifndef LACKS_STRING_H | ||
1168 | #include <string.h> /* for memset etc */ | ||
1169 | #endif /* LACKS_STRING_H */ | ||
1170 | #if USE_BUILTIN_FFS | ||
1171 | #ifndef LACKS_STRINGS_H | ||
1172 | #include <strings.h> /* for ffs */ | ||
1173 | #endif /* LACKS_STRINGS_H */ | ||
1174 | #endif /* USE_BUILTIN_FFS */ | ||
1175 | #if HAVE_MMAP | ||
1176 | #ifndef LACKS_SYS_MMAN_H | ||
1177 | #include <sys/mman.h> /* for mmap */ | ||
1178 | #endif /* LACKS_SYS_MMAN_H */ | ||
1179 | #ifndef LACKS_FCNTL_H | ||
1180 | #include <fcntl.h> | ||
1181 | #endif /* LACKS_FCNTL_H */ | ||
1182 | #endif /* HAVE_MMAP */ | ||
1183 | #if HAVE_MORECORE | ||
1184 | #ifndef LACKS_UNISTD_H | ||
1185 | #include <unistd.h> /* for sbrk */ | ||
1186 | #else /* LACKS_UNISTD_H */ | ||
1187 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) | ||
1188 | extern void* sbrk(ptrdiff_t); | ||
1189 | #endif /* FreeBSD etc */ | ||
1190 | #endif /* LACKS_UNISTD_H */ | ||
1191 | #endif /* HAVE_MMAP */ | ||
1192 | |||
1193 | #ifndef WIN32 | ||
1194 | #ifndef malloc_getpagesize | ||
1195 | # ifdef _SC_PAGESIZE /* some SVR4 systems omit an underscore */ | ||
1196 | # ifndef _SC_PAGE_SIZE | ||
1197 | # define _SC_PAGE_SIZE _SC_PAGESIZE | ||
1198 | # endif | ||
1199 | # endif | ||
1200 | # ifdef _SC_PAGE_SIZE | ||
1201 | # define malloc_getpagesize sysconf(_SC_PAGE_SIZE) | ||
1202 | # else | ||
1203 | # if defined(BSD) || defined(DGUX) || defined(HAVE_GETPAGESIZE) | ||
1204 | extern size_t getpagesize(); | ||
1205 | # define malloc_getpagesize getpagesize() | ||
1206 | # else | ||
1207 | # ifdef WIN32 /* use supplied emulation of getpagesize */ | ||
1208 | # define malloc_getpagesize getpagesize() | ||
1209 | # else | ||
1210 | # ifndef LACKS_SYS_PARAM_H | ||
1211 | # include <sys/param.h> | ||
1212 | # endif | ||
1213 | # ifdef EXEC_PAGESIZE | ||
1214 | # define malloc_getpagesize EXEC_PAGESIZE | ||
1215 | # else | ||
1216 | # ifdef NBPG | ||
1217 | # ifndef CLSIZE | ||
1218 | # define malloc_getpagesize NBPG | ||
1219 | # else | ||
1220 | # define malloc_getpagesize (NBPG * CLSIZE) | ||
1221 | # endif | ||
1222 | # else | ||
1223 | # ifdef NBPC | ||
1224 | # define malloc_getpagesize NBPC | ||
1225 | # else | ||
1226 | # ifdef PAGESIZE | ||
1227 | # define malloc_getpagesize PAGESIZE | ||
1228 | # else /* just guess */ | ||
1229 | # define malloc_getpagesize ((size_t)4096U) | ||
1230 | # endif | ||
1231 | # endif | ||
1232 | # endif | ||
1233 | # endif | ||
1234 | # endif | ||
1235 | # endif | ||
1236 | # endif | ||
1237 | #endif | ||
1238 | #endif | ||
1239 | |||
1240 | /* ------------------- size_t and alignment properties -------------------- */ | ||
1241 | |||
1242 | /* The byte and bit size of a size_t */ | ||
1243 | #define SIZE_T_SIZE (sizeof(size_t)) | ||
1244 | #define SIZE_T_BITSIZE (sizeof(size_t) << 3) | ||
1245 | |||
1246 | /* Some constants coerced to size_t */ | ||
1247 | /* Annoying but necessary to avoid errors on some plaftorms */ | ||
1248 | #define SIZE_T_ZERO ((size_t)0) | ||
1249 | #define SIZE_T_ONE ((size_t)1) | ||
1250 | #define SIZE_T_TWO ((size_t)2) | ||
1251 | #define TWO_SIZE_T_SIZES (SIZE_T_SIZE<<1) | ||
1252 | #define FOUR_SIZE_T_SIZES (SIZE_T_SIZE<<2) | ||
1253 | #define SIX_SIZE_T_SIZES (FOUR_SIZE_T_SIZES+TWO_SIZE_T_SIZES) | ||
1254 | #define HALF_MAX_SIZE_T (MAX_SIZE_T / 2U) | ||
1255 | |||
1256 | /* The bit mask value corresponding to MALLOC_ALIGNMENT */ | ||
1257 | #define CHUNK_ALIGN_MASK (MALLOC_ALIGNMENT - SIZE_T_ONE) | ||
1258 | |||
1259 | /* True if address a has acceptable alignment */ | ||
1260 | #define is_aligned(A) (((size_t)((A)) & (CHUNK_ALIGN_MASK)) == 0) | ||
1261 | |||
1262 | /* the number of bytes to offset an address to align it */ | ||
1263 | #define align_offset(A)\ | ||
1264 | ((((size_t)(A) & CHUNK_ALIGN_MASK) == 0)? 0 :\ | ||
1265 | ((MALLOC_ALIGNMENT - ((size_t)(A) & CHUNK_ALIGN_MASK)) & CHUNK_ALIGN_MASK)) | ||
1266 | |||
1267 | /* -------------------------- MMAP preliminaries ------------------------- */ | ||
1268 | |||
1269 | /* | ||
1270 | If HAVE_MORECORE or HAVE_MMAP are false, we just define calls and | ||
1271 | checks to fail so compiler optimizer can delete code rather than | ||
1272 | using so many "#if"s. | ||
1273 | */ | ||
1274 | |||
1275 | |||
1276 | /* MORECORE and MMAP must return MFAIL on failure */ | ||
1277 | #define MFAIL ((void*)(MAX_SIZE_T)) | ||
1278 | #define CMFAIL ((char*)(MFAIL)) /* defined for convenience */ | ||
1279 | |||
1280 | #if !HAVE_MMAP | ||
1281 | #define IS_MMAPPED_BIT (SIZE_T_ZERO) | ||
1282 | #define USE_MMAP_BIT (SIZE_T_ZERO) | ||
1283 | #define CALL_MMAP(s) MFAIL | ||
1284 | #define CALL_MUNMAP(a, s) (-1) | ||
1285 | #define DIRECT_MMAP(s) MFAIL | ||
1286 | |||
1287 | #else /* HAVE_MMAP */ | ||
1288 | #define IS_MMAPPED_BIT (SIZE_T_ONE) | ||
1289 | #define USE_MMAP_BIT (SIZE_T_ONE) | ||
1290 | |||
1291 | #ifndef WIN32 | ||
1292 | #define CALL_MUNMAP(a, s) munmap((a), (s)) | ||
1293 | #define MMAP_PROT (PROT_READ|PROT_WRITE) | ||
1294 | #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) | ||
1295 | #define MAP_ANONYMOUS MAP_ANON | ||
1296 | #endif /* MAP_ANON */ | ||
1297 | #ifdef MAP_ANONYMOUS | ||
1298 | #define MMAP_FLAGS (MAP_PRIVATE|MAP_ANONYMOUS) | ||
1299 | #define CALL_MMAP(s) mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0) | ||
1300 | #else /* MAP_ANONYMOUS */ | ||
1301 | /* | ||
1302 | Nearly all versions of mmap support MAP_ANONYMOUS, so the following | ||
1303 | is unlikely to be needed, but is supplied just in case. | ||
1304 | */ | ||
1305 | #define MMAP_FLAGS (MAP_PRIVATE) | ||
1306 | static int dev_zero_fd = -1; /* Cached file descriptor for /dev/zero. */ | ||
1307 | #define CALL_MMAP(s) ((dev_zero_fd < 0) ? \ | ||
1308 | (dev_zero_fd = open("/dev/zero", O_RDWR), \ | ||
1309 | mmap(0, (s), MMAP_PROT, MMAP_FLAGS, dev_zero_fd, 0)) : \ | ||
1310 | mmap(0, (s), MMAP_PROT, MMAP_FLAGS, dev_zero_fd, 0)) | ||
1311 | #endif /* MAP_ANONYMOUS */ | ||
1312 | |||
1313 | #define DIRECT_MMAP(s) CALL_MMAP(s) | ||
1314 | #else /* WIN32 */ | ||
1315 | |||
1316 | /* Win32 MMAP via VirtualAlloc */ | ||
1317 | static void* win32mmap(size_t size) { | ||
1318 | void* ptr = VirtualAlloc(0, size, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE); | ||
1319 | return (ptr != 0)? ptr: MFAIL; | ||
1320 | } | ||
1321 | |||
1322 | /* For direct MMAP, use MEM_TOP_DOWN to minimize interference */ | ||
1323 | static void* win32direct_mmap(size_t size) { | ||
1324 | void* ptr = VirtualAlloc(0, size, MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN, | ||
1325 | PAGE_READWRITE); | ||
1326 | return (ptr != 0)? ptr: MFAIL; | ||
1327 | } | ||
1328 | |||
1329 | /* This function supports releasing coalesed segments */ | ||
1330 | static int win32munmap(void* ptr, size_t size) { | ||
1331 | MEMORY_BASIC_INFORMATION minfo; | ||
1332 | char* cptr = ptr; | ||
1333 | while (size) { | ||
1334 | if (VirtualQuery(cptr, &minfo, sizeof(minfo)) == 0) | ||
1335 | return -1; | ||
1336 | if (minfo.BaseAddress != cptr || minfo.AllocationBase != cptr || | ||
1337 | minfo.State != MEM_COMMIT || minfo.RegionSize > size) | ||
1338 | return -1; | ||
1339 | if (VirtualFree(cptr, 0, MEM_RELEASE) == 0) | ||
1340 | return -1; | ||
1341 | cptr += minfo.RegionSize; | ||
1342 | size -= minfo.RegionSize; | ||
1343 | } | ||
1344 | return 0; | ||
1345 | } | ||
1346 | |||
1347 | #define CALL_MMAP(s) win32mmap(s) | ||
1348 | #define CALL_MUNMAP(a, s) win32munmap((a), (s)) | ||
1349 | #define DIRECT_MMAP(s) win32direct_mmap(s) | ||
1350 | #endif /* WIN32 */ | ||
1351 | #endif /* HAVE_MMAP */ | ||
1352 | |||
1353 | #if HAVE_MMAP && HAVE_MREMAP | ||
1354 | #define CALL_MREMAP(addr, osz, nsz, mv) mremap((addr), (osz), (nsz), (mv)) | ||
1355 | #else /* HAVE_MMAP && HAVE_MREMAP */ | ||
1356 | #define CALL_MREMAP(addr, osz, nsz, mv) MFAIL | ||
1357 | #endif /* HAVE_MMAP && HAVE_MREMAP */ | ||
1358 | |||
1359 | #if HAVE_MORECORE | ||
1360 | #define CALL_MORECORE(S) MORECORE(S) | ||
1361 | #else /* HAVE_MORECORE */ | ||
1362 | #define CALL_MORECORE(S) MFAIL | ||
1363 | #endif /* HAVE_MORECORE */ | ||
1364 | |||
1365 | /* mstate bit set if continguous morecore disabled or failed */ | ||
1366 | #define USE_NONCONTIGUOUS_BIT (4U) | ||
1367 | |||
1368 | /* segment bit set in create_mspace_with_base */ | ||
1369 | #define EXTERN_BIT (8U) | ||
1370 | |||
1371 | |||
1372 | /* --------------------------- Lock preliminaries ------------------------ */ | ||
1373 | |||
1374 | #if USE_LOCKS | ||
1375 | |||
1376 | /* | ||
1377 | When locks are defined, there are up to two global locks: | ||
1378 | |||
1379 | * If HAVE_MORECORE, morecore_mutex protects sequences of calls to | ||
1380 | MORECORE. In many cases sys_alloc requires two calls, that should | ||
1381 | not be interleaved with calls by other threads. This does not | ||
1382 | protect against direct calls to MORECORE by other threads not | ||
1383 | using this lock, so there is still code to cope the best we can on | ||
1384 | interference. | ||
1385 | |||
1386 | * magic_init_mutex ensures that mparams.magic and other | ||
1387 | unique mparams values are initialized only once. | ||
1388 | */ | ||
1389 | |||
1390 | #ifndef WIN32 | ||
1391 | /* By default use posix locks */ | ||
1392 | #include <pthread.h> | ||
1393 | #define MLOCK_T pthread_mutex_t | ||
1394 | #define INITIAL_LOCK(l) pthread_mutex_init(l, NULL) | ||
1395 | #define ACQUIRE_LOCK(l) pthread_mutex_lock(l) | ||
1396 | #define RELEASE_LOCK(l) pthread_mutex_unlock(l) | ||
1397 | |||
1398 | #if HAVE_MORECORE | ||
1399 | static MLOCK_T morecore_mutex = PTHREAD_MUTEX_INITIALIZER; | ||
1400 | #endif /* HAVE_MORECORE */ | ||
1401 | |||
1402 | static MLOCK_T magic_init_mutex = PTHREAD_MUTEX_INITIALIZER; | ||
1403 | |||
1404 | #else /* WIN32 */ | ||
1405 | /* | ||
1406 | Because lock-protected regions have bounded times, and there | ||
1407 | are no recursive lock calls, we can use simple spinlocks. | ||
1408 | */ | ||
1409 | |||
1410 | #define MLOCK_T long | ||
1411 | static int win32_acquire_lock (MLOCK_T *sl) { | ||
1412 | for (;;) { | ||
1413 | #ifdef InterlockedCompareExchangePointer | ||
1414 | if (!InterlockedCompareExchange(sl, 1, 0)) | ||
1415 | return 0; | ||
1416 | #else /* Use older void* version */ | ||
1417 | if (!InterlockedCompareExchange((void**)sl, (void*)1, (void*)0)) | ||
1418 | return 0; | ||
1419 | #endif /* InterlockedCompareExchangePointer */ | ||
1420 | Sleep (0); | ||
1421 | } | ||
1422 | } | ||
1423 | |||
1424 | static void win32_release_lock (MLOCK_T *sl) { | ||
1425 | InterlockedExchange (sl, 0); | ||
1426 | } | ||
1427 | |||
1428 | #define INITIAL_LOCK(l) *(l)=0 | ||
1429 | #define ACQUIRE_LOCK(l) win32_acquire_lock(l) | ||
1430 | #define RELEASE_LOCK(l) win32_release_lock(l) | ||
1431 | #if HAVE_MORECORE | ||
1432 | static MLOCK_T morecore_mutex; | ||
1433 | #endif /* HAVE_MORECORE */ | ||
1434 | static MLOCK_T magic_init_mutex; | ||
1435 | #endif /* WIN32 */ | ||
1436 | |||
1437 | #define USE_LOCK_BIT (2U) | ||
1438 | #else /* USE_LOCKS */ | ||
1439 | #define USE_LOCK_BIT (0U) | ||
1440 | #define INITIAL_LOCK(l) | ||
1441 | #endif /* USE_LOCKS */ | ||
1442 | |||
1443 | #if USE_LOCKS && HAVE_MORECORE | ||
1444 | #define ACQUIRE_MORECORE_LOCK() ACQUIRE_LOCK(&morecore_mutex); | ||
1445 | #define RELEASE_MORECORE_LOCK() RELEASE_LOCK(&morecore_mutex); | ||
1446 | #else /* USE_LOCKS && HAVE_MORECORE */ | ||
1447 | #define ACQUIRE_MORECORE_LOCK() | ||
1448 | #define RELEASE_MORECORE_LOCK() | ||
1449 | #endif /* USE_LOCKS && HAVE_MORECORE */ | ||
1450 | |||
1451 | #if USE_LOCKS | ||
1452 | #define ACQUIRE_MAGIC_INIT_LOCK() ACQUIRE_LOCK(&magic_init_mutex); | ||
1453 | #define RELEASE_MAGIC_INIT_LOCK() RELEASE_LOCK(&magic_init_mutex); | ||
1454 | #else /* USE_LOCKS */ | ||
1455 | #define ACQUIRE_MAGIC_INIT_LOCK() | ||
1456 | #define RELEASE_MAGIC_INIT_LOCK() | ||
1457 | #endif /* USE_LOCKS */ | ||
1458 | |||
1459 | |||
1460 | /* ----------------------- Chunk representations ------------------------ */ | ||
1461 | |||
1462 | /* | ||
1463 | (The following includes lightly edited explanations by Colin Plumb.) | ||
1464 | |||
1465 | The malloc_chunk declaration below is misleading (but accurate and | ||
1466 | necessary). It declares a "view" into memory allowing access to | ||
1467 | necessary fields at known offsets from a given base. | ||
1468 | |||
1469 | Chunks of memory are maintained using a `boundary tag' method as | ||
1470 | originally described by Knuth. (See the paper by Paul Wilson | ||
1471 | ftp://ftp.cs.utexas.edu/pub/garbage/allocsrv.ps for a survey of such | ||
1472 | techniques.) Sizes of free chunks are stored both in the front of | ||
1473 | each chunk and at the end. This makes consolidating fragmented | ||
1474 | chunks into bigger chunks fast. The head fields also hold bits | ||
1475 | representing whether chunks are free or in use. | ||
1476 | |||
1477 | Here are some pictures to make it clearer. They are "exploded" to | ||
1478 | show that the state of a chunk can be thought of as extending from | ||
1479 | the high 31 bits of the head field of its header through the | ||
1480 | prev_foot and PINUSE_BIT bit of the following chunk header. | ||
1481 | |||
1482 | A chunk that's in use looks like: | ||
1483 | |||
1484 | chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1485 | | Size of previous chunk (if P = 1) | | ||
1486 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1487 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |P| | ||
1488 | | Size of this chunk 1| +-+ | ||
1489 | mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1490 | | | | ||
1491 | +- -+ | ||
1492 | | | | ||
1493 | +- -+ | ||
1494 | | : | ||
1495 | +- size - sizeof(size_t) available payload bytes -+ | ||
1496 | : | | ||
1497 | chunk-> +- -+ | ||
1498 | | | | ||
1499 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1500 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1| | ||
1501 | | Size of next chunk (may or may not be in use) | +-+ | ||
1502 | mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1503 | |||
1504 | And if it's free, it looks like this: | ||
1505 | |||
1506 | chunk-> +- -+ | ||
1507 | | User payload (must be in use, or we would have merged!) | | ||
1508 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1509 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |P| | ||
1510 | | Size of this chunk 0| +-+ | ||
1511 | mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1512 | | Next pointer | | ||
1513 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1514 | | Prev pointer | | ||
1515 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1516 | | : | ||
1517 | +- size - sizeof(struct chunk) unused bytes -+ | ||
1518 | : | | ||
1519 | chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1520 | | Size of this chunk | | ||
1521 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1522 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |0| | ||
1523 | | Size of next chunk (must be in use, or we would have merged)| +-+ | ||
1524 | mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1525 | | : | ||
1526 | +- User payload -+ | ||
1527 | : | | ||
1528 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1529 | |0| | ||
1530 | +-+ | ||
1531 | Note that since we always merge adjacent free chunks, the chunks | ||
1532 | adjacent to a free chunk must be in use. | ||
1533 | |||
1534 | Given a pointer to a chunk (which can be derived trivially from the | ||
1535 | payload pointer) we can, in O(1) time, find out whether the adjacent | ||
1536 | chunks are free, and if so, unlink them from the lists that they | ||
1537 | are on and merge them with the current chunk. | ||
1538 | |||
1539 | Chunks always begin on even word boundaries, so the mem portion | ||
1540 | (which is returned to the user) is also on an even word boundary, and | ||
1541 | thus at least double-word aligned. | ||
1542 | |||
1543 | The P (PINUSE_BIT) bit, stored in the unused low-order bit of the | ||
1544 | chunk size (which is always a multiple of two words), is an in-use | ||
1545 | bit for the *previous* chunk. If that bit is *clear*, then the | ||
1546 | word before the current chunk size contains the previous chunk | ||
1547 | size, and can be used to find the front of the previous chunk. | ||
1548 | The very first chunk allocated always has this bit set, preventing | ||
1549 | access to non-existent (or non-owned) memory. If pinuse is set for | ||
1550 | any given chunk, then you CANNOT determine the size of the | ||
1551 | previous chunk, and might even get a memory addressing fault when | ||
1552 | trying to do so. | ||
1553 | |||
1554 | The C (CINUSE_BIT) bit, stored in the unused second-lowest bit of | ||
1555 | the chunk size redundantly records whether the current chunk is | ||
1556 | inuse. This redundancy enables usage checks within free and realloc, | ||
1557 | and reduces indirection when freeing and consolidating chunks. | ||
1558 | |||
1559 | Each freshly allocated chunk must have both cinuse and pinuse set. | ||
1560 | That is, each allocated chunk borders either a previously allocated | ||
1561 | and still in-use chunk, or the base of its memory arena. This is | ||
1562 | ensured by making all allocations from the the `lowest' part of any | ||
1563 | found chunk. Further, no free chunk physically borders another one, | ||
1564 | so each free chunk is known to be preceded and followed by either | ||
1565 | inuse chunks or the ends of memory. | ||
1566 | |||
1567 | Note that the `foot' of the current chunk is actually represented | ||
1568 | as the prev_foot of the NEXT chunk. This makes it easier to | ||
1569 | deal with alignments etc but can be very confusing when trying | ||
1570 | to extend or adapt this code. | ||
1571 | |||
1572 | The exceptions to all this are | ||
1573 | |||
1574 | 1. The special chunk `top' is the top-most available chunk (i.e., | ||
1575 | the one bordering the end of available memory). It is treated | ||
1576 | specially. Top is never included in any bin, is used only if | ||
1577 | no other chunk is available, and is released back to the | ||
1578 | system if it is very large (see M_TRIM_THRESHOLD). In effect, | ||
1579 | the top chunk is treated as larger (and thus less well | ||
1580 | fitting) than any other available chunk. The top chunk | ||
1581 | doesn't update its trailing size field since there is no next | ||
1582 | contiguous chunk that would have to index off it. However, | ||
1583 | space is still allocated for it (TOP_FOOT_SIZE) to enable | ||
1584 | separation or merging when space is extended. | ||
1585 | |||
1586 | 3. Chunks allocated via mmap, which have the lowest-order bit | ||
1587 | (IS_MMAPPED_BIT) set in their prev_foot fields, and do not set | ||
1588 | PINUSE_BIT in their head fields. Because they are allocated | ||
1589 | one-by-one, each must carry its own prev_foot field, which is | ||
1590 | also used to hold the offset this chunk has within its mmapped | ||
1591 | region, which is needed to preserve alignment. Each mmapped | ||
1592 | chunk is trailed by the first two fields of a fake next-chunk | ||
1593 | for sake of usage checks. | ||
1594 | |||
1595 | */ | ||
1596 | |||
1597 | struct malloc_chunk { | ||
1598 | size_t prev_foot; /* Size of previous chunk (if free). */ | ||
1599 | size_t head; /* Size and inuse bits. */ | ||
1600 | struct malloc_chunk* fd; /* double links -- used only if free. */ | ||
1601 | struct malloc_chunk* bk; | ||
1602 | }; | ||
1603 | |||
1604 | typedef struct malloc_chunk mchunk; | ||
1605 | typedef struct malloc_chunk* mchunkptr; | ||
1606 | typedef struct malloc_chunk* sbinptr; /* The type of bins of chunks */ | ||
1607 | typedef unsigned int bindex_t; /* Described below */ | ||
1608 | typedef unsigned int binmap_t; /* Described below */ | ||
1609 | typedef unsigned int flag_t; /* The type of various bit flag sets */ | ||
1610 | |||
1611 | /* ------------------- Chunks sizes and alignments ----------------------- */ | ||
1612 | |||
1613 | #define MCHUNK_SIZE (sizeof(mchunk)) | ||
1614 | |||
1615 | #if FOOTERS | ||
1616 | #define CHUNK_OVERHEAD (TWO_SIZE_T_SIZES) | ||
1617 | #else /* FOOTERS */ | ||
1618 | #define CHUNK_OVERHEAD (SIZE_T_SIZE) | ||
1619 | #endif /* FOOTERS */ | ||
1620 | |||
1621 | /* MMapped chunks need a second word of overhead ... */ | ||
1622 | #define MMAP_CHUNK_OVERHEAD (TWO_SIZE_T_SIZES) | ||
1623 | /* ... and additional padding for fake next-chunk at foot */ | ||
1624 | #define MMAP_FOOT_PAD (FOUR_SIZE_T_SIZES) | ||
1625 | |||
1626 | /* The smallest size we can malloc is an aligned minimal chunk */ | ||
1627 | #define MIN_CHUNK_SIZE\ | ||
1628 | ((MCHUNK_SIZE + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK) | ||
1629 | |||
1630 | /* conversion from malloc headers to user pointers, and back */ | ||
1631 | #define chunk2mem(p) ((void*)((char*)(p) + TWO_SIZE_T_SIZES)) | ||
1632 | #define mem2chunk(mem) ((mchunkptr)((char*)(mem) - TWO_SIZE_T_SIZES)) | ||
1633 | /* chunk associated with aligned address A */ | ||
1634 | #define align_as_chunk(A) (mchunkptr)((A) + align_offset(chunk2mem(A))) | ||
1635 | |||
1636 | /* Bounds on request (not chunk) sizes. */ | ||
1637 | #define MAX_REQUEST ((-MIN_CHUNK_SIZE) << 2) | ||
1638 | #define MIN_REQUEST (MIN_CHUNK_SIZE - CHUNK_OVERHEAD - SIZE_T_ONE) | ||
1639 | |||
1640 | /* pad request bytes into a usable size */ | ||
1641 | #define pad_request(req) \ | ||
1642 | (((req) + CHUNK_OVERHEAD + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK) | ||
1643 | |||
1644 | /* pad request, checking for minimum (but not maximum) */ | ||
1645 | #define request2size(req) \ | ||
1646 | (((req) < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(req)) | ||
1647 | |||
1648 | |||
1649 | /* ------------------ Operations on head and foot fields ----------------- */ | ||
1650 | |||
1651 | /* | ||
1652 | The head field of a chunk is or'ed with PINUSE_BIT when previous | ||
1653 | adjacent chunk in use, and or'ed with CINUSE_BIT if this chunk is in | ||
1654 | use. If the chunk was obtained with mmap, the prev_foot field has | ||
1655 | IS_MMAPPED_BIT set, otherwise holding the offset of the base of the | ||
1656 | mmapped region to the base of the chunk. | ||
1657 | */ | ||
1658 | |||
1659 | #define PINUSE_BIT (SIZE_T_ONE) | ||
1660 | #define CINUSE_BIT (SIZE_T_TWO) | ||
1661 | #define INUSE_BITS (PINUSE_BIT|CINUSE_BIT) | ||
1662 | |||
1663 | /* Head value for fenceposts */ | ||
1664 | #define FENCEPOST_HEAD (INUSE_BITS|SIZE_T_SIZE) | ||
1665 | |||
1666 | /* extraction of fields from head words */ | ||
1667 | #define cinuse(p) ((p)->head & CINUSE_BIT) | ||
1668 | #define pinuse(p) ((p)->head & PINUSE_BIT) | ||
1669 | #define chunksize(p) ((p)->head & ~(INUSE_BITS)) | ||
1670 | |||
1671 | #define clear_pinuse(p) ((p)->head &= ~PINUSE_BIT) | ||
1672 | #define clear_cinuse(p) ((p)->head &= ~CINUSE_BIT) | ||
1673 | |||
1674 | /* Treat space at ptr +/- offset as a chunk */ | ||
1675 | #define chunk_plus_offset(p, s) ((mchunkptr)(((char*)(p)) + (s))) | ||
1676 | #define chunk_minus_offset(p, s) ((mchunkptr)(((char*)(p)) - (s))) | ||
1677 | |||
1678 | /* Ptr to next or previous physical malloc_chunk. */ | ||
1679 | #define next_chunk(p) ((mchunkptr)( ((char*)(p)) + ((p)->head & ~INUSE_BITS))) | ||
1680 | #define prev_chunk(p) ((mchunkptr)( ((char*)(p)) - ((p)->prev_foot) )) | ||
1681 | |||
1682 | /* extract next chunk's pinuse bit */ | ||
1683 | #define next_pinuse(p) ((next_chunk(p)->head) & PINUSE_BIT) | ||
1684 | |||
1685 | /* Get/set size at footer */ | ||
1686 | #define get_foot(p, s) (((mchunkptr)((char*)(p) + (s)))->prev_foot) | ||
1687 | #define set_foot(p, s) (((mchunkptr)((char*)(p) + (s)))->prev_foot = (s)) | ||
1688 | |||
1689 | /* Set size, pinuse bit, and foot */ | ||
1690 | #define set_size_and_pinuse_of_free_chunk(p, s)\ | ||
1691 | ((p)->head = (s|PINUSE_BIT), set_foot(p, s)) | ||
1692 | |||
1693 | /* Set size, pinuse bit, foot, and clear next pinuse */ | ||
1694 | #define set_free_with_pinuse(p, s, n)\ | ||
1695 | (clear_pinuse(n), set_size_and_pinuse_of_free_chunk(p, s)) | ||
1696 | |||
1697 | #define is_mmapped(p)\ | ||
1698 | (!((p)->head & PINUSE_BIT) && ((p)->prev_foot & IS_MMAPPED_BIT)) | ||
1699 | |||
1700 | /* Get the internal overhead associated with chunk p */ | ||
1701 | #define overhead_for(p)\ | ||
1702 | (is_mmapped(p)? MMAP_CHUNK_OVERHEAD : CHUNK_OVERHEAD) | ||
1703 | |||
1704 | /* Return true if malloced space is not necessarily cleared */ | ||
1705 | #if MMAP_CLEARS | ||
1706 | #define calloc_must_clear(p) (!is_mmapped(p)) | ||
1707 | #else /* MMAP_CLEARS */ | ||
1708 | #define calloc_must_clear(p) (1) | ||
1709 | #endif /* MMAP_CLEARS */ | ||
1710 | |||
1711 | /* ---------------------- Overlaid data structures ----------------------- */ | ||
1712 | |||
1713 | /* | ||
1714 | When chunks are not in use, they are treated as nodes of either | ||
1715 | lists or trees. | ||
1716 | |||
1717 | "Small" chunks are stored in circular doubly-linked lists, and look | ||
1718 | like this: | ||
1719 | |||
1720 | chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1721 | | Size of previous chunk | | ||
1722 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1723 | `head:' | Size of chunk, in bytes |P| | ||
1724 | mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1725 | | Forward pointer to next chunk in list | | ||
1726 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1727 | | Back pointer to previous chunk in list | | ||
1728 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1729 | | Unused space (may be 0 bytes long) . | ||
1730 | . . | ||
1731 | . | | ||
1732 | nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1733 | `foot:' | Size of chunk, in bytes | | ||
1734 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1735 | |||
1736 | Larger chunks are kept in a form of bitwise digital trees (aka | ||
1737 | tries) keyed on chunksizes. Because malloc_tree_chunks are only for | ||
1738 | free chunks greater than 256 bytes, their size doesn't impose any | ||
1739 | constraints on user chunk sizes. Each node looks like: | ||
1740 | |||
1741 | chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1742 | | Size of previous chunk | | ||
1743 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1744 | `head:' | Size of chunk, in bytes |P| | ||
1745 | mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1746 | | Forward pointer to next chunk of same size | | ||
1747 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1748 | | Back pointer to previous chunk of same size | | ||
1749 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1750 | | Pointer to left child (child[0]) | | ||
1751 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1752 | | Pointer to right child (child[1]) | | ||
1753 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1754 | | Pointer to parent | | ||
1755 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1756 | | bin index of this chunk | | ||
1757 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1758 | | Unused space . | ||
1759 | . | | ||
1760 | nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1761 | `foot:' | Size of chunk, in bytes | | ||
1762 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ||
1763 | |||
1764 | Each tree holding treenodes is a tree of unique chunk sizes. Chunks | ||
1765 | of the same size are arranged in a circularly-linked list, with only | ||
1766 | the oldest chunk (the next to be used, in our FIFO ordering) | ||
1767 | actually in the tree. (Tree members are distinguished by a non-null | ||
1768 | parent pointer.) If a chunk with the same size an an existing node | ||
1769 | is inserted, it is linked off the existing node using pointers that | ||
1770 | work in the same way as fd/bk pointers of small chunks. | ||
1771 | |||
1772 | Each tree contains a power of 2 sized range of chunk sizes (the | ||
1773 | smallest is 0x100 <= x < 0x180), which is is divided in half at each | ||
1774 | tree level, with the chunks in the smaller half of the range (0x100 | ||
1775 | <= x < 0x140 for the top nose) in the left subtree and the larger | ||
1776 | half (0x140 <= x < 0x180) in the right subtree. This is, of course, | ||
1777 | done by inspecting individual bits. | ||
1778 | |||
1779 | Using these rules, each node's left subtree contains all smaller | ||
1780 | sizes than its right subtree. However, the node at the root of each | ||
1781 | subtree has no particular ordering relationship to either. (The | ||
1782 | dividing line between the subtree sizes is based on trie relation.) | ||
1783 | If we remove the last chunk of a given size from the interior of the | ||
1784 | tree, we need to replace it with a leaf node. The tree ordering | ||
1785 | rules permit a node to be replaced by any leaf below it. | ||
1786 | |||
1787 | The smallest chunk in a tree (a common operation in a best-fit | ||
1788 | allocator) can be found by walking a path to the leftmost leaf in | ||
1789 | the tree. Unlike a usual binary tree, where we follow left child | ||
1790 | pointers until we reach a null, here we follow the right child | ||
1791 | pointer any time the left one is null, until we reach a leaf with | ||
1792 | both child pointers null. The smallest chunk in the tree will be | ||
1793 | somewhere along that path. | ||
1794 | |||
1795 | The worst case number of steps to add, find, or remove a node is | ||
1796 | bounded by the number of bits differentiating chunks within | ||
1797 | bins. Under current bin calculations, this ranges from 6 up to 21 | ||
1798 | (for 32 bit sizes) or up to 53 (for 64 bit sizes). The typical case | ||
1799 | is of course much better. | ||
1800 | */ | ||
1801 | |||
1802 | struct malloc_tree_chunk { | ||
1803 | /* The first four fields must be compatible with malloc_chunk */ | ||
1804 | size_t prev_foot; | ||
1805 | size_t head; | ||
1806 | struct malloc_tree_chunk* fd; | ||
1807 | struct malloc_tree_chunk* bk; | ||
1808 | |||
1809 | struct malloc_tree_chunk* child[2]; | ||
1810 | struct malloc_tree_chunk* parent; | ||
1811 | bindex_t index; | ||
1812 | }; | ||
1813 | |||
1814 | typedef struct malloc_tree_chunk tchunk; | ||
1815 | typedef struct malloc_tree_chunk* tchunkptr; | ||
1816 | typedef struct malloc_tree_chunk* tbinptr; /* The type of bins of trees */ | ||
1817 | |||
1818 | /* A little helper macro for trees */ | ||
1819 | #define leftmost_child(t) ((t)->child[0] != 0? (t)->child[0] : (t)->child[1]) | ||
1820 | |||
1821 | /* ----------------------------- Segments -------------------------------- */ | ||
1822 | |||
1823 | /* | ||
1824 | Each malloc space may include non-contiguous segments, held in a | ||
1825 | list headed by an embedded malloc_segment record representing the | ||
1826 | top-most space. Segments also include flags holding properties of | ||
1827 | the space. Large chunks that are directly allocated by mmap are not | ||
1828 | included in this list. They are instead independently created and | ||
1829 | destroyed without otherwise keeping track of them. | ||
1830 | |||
1831 | Segment management mainly comes into play for spaces allocated by | ||
1832 | MMAP. Any call to MMAP might or might not return memory that is | ||
1833 | adjacent to an existing segment. MORECORE normally contiguously | ||
1834 | extends the current space, so this space is almost always adjacent, | ||
1835 | which is simpler and faster to deal with. (This is why MORECORE is | ||
1836 | used preferentially to MMAP when both are available -- see | ||
1837 | sys_alloc.) When allocating using MMAP, we don't use any of the | ||
1838 | hinting mechanisms (inconsistently) supported in various | ||
1839 | implementations of unix mmap, or distinguish reserving from | ||
1840 | committing memory. Instead, we just ask for space, and exploit | ||
1841 | contiguity when we get it. It is probably possible to do | ||
1842 | better than this on some systems, but no general scheme seems | ||
1843 | to be significantly better. | ||
1844 | |||
1845 | Management entails a simpler variant of the consolidation scheme | ||
1846 | used for chunks to reduce fragmentation -- new adjacent memory is | ||
1847 | normally prepended or appended to an existing segment. However, | ||
1848 | there are limitations compared to chunk consolidation that mostly | ||
1849 | reflect the fact that segment processing is relatively infrequent | ||
1850 | (occurring only when getting memory from system) and that we | ||
1851 | don't expect to have huge numbers of segments: | ||
1852 | |||
1853 | * Segments are not indexed, so traversal requires linear scans. (It | ||
1854 | would be possible to index these, but is not worth the extra | ||
1855 | overhead and complexity for most programs on most platforms.) | ||
1856 | * New segments are only appended to old ones when holding top-most | ||
1857 | memory; if they cannot be prepended to others, they are held in | ||
1858 | different segments. | ||
1859 | |||
1860 | Except for the top-most segment of an mstate, each segment record | ||
1861 | is kept at the tail of its segment. Segments are added by pushing | ||
1862 | segment records onto the list headed by &mstate.seg for the | ||
1863 | containing mstate. | ||
1864 | |||
1865 | Segment flags control allocation/merge/deallocation policies: | ||
1866 | * If EXTERN_BIT set, then we did not allocate this segment, | ||
1867 | and so should not try to deallocate or merge with others. | ||
1868 | (This currently holds only for the initial segment passed | ||
1869 | into create_mspace_with_base.) | ||
1870 | * If IS_MMAPPED_BIT set, the segment may be merged with | ||
1871 | other surrounding mmapped segments and trimmed/de-allocated | ||
1872 | using munmap. | ||
1873 | * If neither bit is set, then the segment was obtained using | ||
1874 | MORECORE so can be merged with surrounding MORECORE'd segments | ||
1875 | and deallocated/trimmed using MORECORE with negative arguments. | ||
1876 | */ | ||
1877 | |||
1878 | struct malloc_segment { | ||
1879 | char* base; /* base address */ | ||
1880 | size_t size; /* allocated size */ | ||
1881 | struct malloc_segment* next; /* ptr to next segment */ | ||
1882 | flag_t sflags; /* mmap and extern flag */ | ||
1883 | }; | ||
1884 | |||
1885 | #define is_mmapped_segment(S) ((S)->sflags & IS_MMAPPED_BIT) | ||
1886 | #define is_extern_segment(S) ((S)->sflags & EXTERN_BIT) | ||
1887 | |||
1888 | typedef struct malloc_segment msegment; | ||
1889 | typedef struct malloc_segment* msegmentptr; | ||
1890 | |||
1891 | /* ---------------------------- malloc_state ----------------------------- */ | ||
1892 | |||
1893 | /* | ||
1894 | A malloc_state holds all of the bookkeeping for a space. | ||
1895 | The main fields are: | ||
1896 | |||
1897 | Top | ||
1898 | The topmost chunk of the currently active segment. Its size is | ||
1899 | cached in topsize. The actual size of topmost space is | ||
1900 | topsize+TOP_FOOT_SIZE, which includes space reserved for adding | ||
1901 | fenceposts and segment records if necessary when getting more | ||
1902 | space from the system. The size at which to autotrim top is | ||
1903 | cached from mparams in trim_check, except that it is disabled if | ||
1904 | an autotrim fails. | ||
1905 | |||
1906 | Designated victim (dv) | ||
1907 | This is the preferred chunk for servicing small requests that | ||
1908 | don't have exact fits. It is normally the chunk split off most | ||
1909 | recently to service another small request. Its size is cached in | ||
1910 | dvsize. The link fields of this chunk are not maintained since it | ||
1911 | is not kept in a bin. | ||
1912 | |||
1913 | SmallBins | ||
1914 | An array of bin headers for free chunks. These bins hold chunks | ||
1915 | with sizes less than MIN_LARGE_SIZE bytes. Each bin contains | ||
1916 | chunks of all the same size, spaced 8 bytes apart. To simplify | ||
1917 | use in double-linked lists, each bin header acts as a malloc_chunk | ||
1918 | pointing to the real first node, if it exists (else pointing to | ||
1919 | itself). This avoids special-casing for headers. But to avoid | ||
1920 | waste, we allocate only the fd/bk pointers of bins, and then use | ||
1921 | repositioning tricks to treat these as the fields of a chunk. | ||
1922 | |||
1923 | TreeBins | ||
1924 | Treebins are pointers to the roots of trees holding a range of | ||
1925 | sizes. There are 2 equally spaced treebins for each power of two | ||
1926 | from TREE_SHIFT to TREE_SHIFT+16. The last bin holds anything | ||
1927 | larger. | ||
1928 | |||
1929 | Bin maps | ||
1930 | There is one bit map for small bins ("smallmap") and one for | ||
1931 | treebins ("treemap). Each bin sets its bit when non-empty, and | ||
1932 | clears the bit when empty. Bit operations are then used to avoid | ||
1933 | bin-by-bin searching -- nearly all "search" is done without ever | ||
1934 | looking at bins that won't be selected. The bit maps | ||
1935 | conservatively use 32 bits per map word, even if on 64bit system. | ||
1936 | For a good description of some of the bit-based techniques used | ||
1937 | here, see Henry S. Warren Jr's book "Hacker's Delight" (and | ||
1938 | supplement at http://hackersdelight.org/). Many of these are | ||
1939 | intended to reduce the branchiness of paths through malloc etc, as | ||
1940 | well as to reduce the number of memory locations read or written. | ||
1941 | |||
1942 | Segments | ||
1943 | A list of segments headed by an embedded malloc_segment record | ||
1944 | representing the initial space. | ||
1945 | |||
1946 | Address check support | ||
1947 | The least_addr field is the least address ever obtained from | ||
1948 | MORECORE or MMAP. Attempted frees and reallocs of any address less | ||
1949 | than this are trapped (unless INSECURE is defined). | ||
1950 | |||
1951 | Magic tag | ||
1952 | A cross-check field that should always hold same value as mparams.magic. | ||
1953 | |||
1954 | Flags | ||
1955 | Bits recording whether to use MMAP, locks, or contiguous MORECORE | ||
1956 | |||
1957 | Statistics | ||
1958 | Each space keeps track of current and maximum system memory | ||
1959 | obtained via MORECORE or MMAP. | ||
1960 | |||
1961 | Locking | ||
1962 | If USE_LOCKS is defined, the "mutex" lock is acquired and released | ||
1963 | around every public call using this mspace. | ||
1964 | */ | ||
1965 | |||
1966 | /* Bin types, widths and sizes */ | ||
1967 | #define NSMALLBINS (32U) | ||
1968 | #define NTREEBINS (32U) | ||
1969 | #define SMALLBIN_SHIFT (3U) | ||
1970 | #define SMALLBIN_WIDTH (SIZE_T_ONE << SMALLBIN_SHIFT) | ||
1971 | #define TREEBIN_SHIFT (8U) | ||
1972 | #define MIN_LARGE_SIZE (SIZE_T_ONE << TREEBIN_SHIFT) | ||
1973 | #define MAX_SMALL_SIZE (MIN_LARGE_SIZE - SIZE_T_ONE) | ||
1974 | #define MAX_SMALL_REQUEST (MAX_SMALL_SIZE - CHUNK_ALIGN_MASK - CHUNK_OVERHEAD) | ||
1975 | |||
1976 | struct malloc_state { | ||
1977 | binmap_t smallmap; | ||
1978 | binmap_t treemap; | ||
1979 | size_t dvsize; | ||
1980 | size_t topsize; | ||
1981 | char* least_addr; | ||
1982 | mchunkptr dv; | ||
1983 | mchunkptr top; | ||
1984 | size_t trim_check; | ||
1985 | size_t magic; | ||
1986 | mchunkptr smallbins[(NSMALLBINS+1)*2]; | ||
1987 | tbinptr treebins[NTREEBINS]; | ||
1988 | size_t footprint; | ||
1989 | size_t max_footprint; | ||
1990 | flag_t mflags; | ||
1991 | #if USE_LOCKS | ||
1992 | MLOCK_T mutex; /* locate lock among fields that rarely change */ | ||
1993 | #endif /* USE_LOCKS */ | ||
1994 | msegment seg; | ||
1995 | }; | ||
1996 | |||
1997 | typedef struct malloc_state* mstate; | ||
1998 | |||
1999 | /* ------------- Global malloc_state and malloc_params ------------------- */ | ||
2000 | |||
2001 | /* | ||
2002 | malloc_params holds global properties, including those that can be | ||
2003 | dynamically set using mallopt. There is a single instance, mparams, | ||
2004 | initialized in init_mparams. | ||
2005 | */ | ||
2006 | |||
2007 | struct malloc_params { | ||
2008 | size_t magic; | ||
2009 | size_t page_size; | ||
2010 | size_t granularity; | ||
2011 | size_t mmap_threshold; | ||
2012 | size_t trim_threshold; | ||
2013 | flag_t default_mflags; | ||
2014 | }; | ||
2015 | |||
2016 | static struct malloc_params mparams; | ||
2017 | |||
2018 | /* The global malloc_state used for all non-"mspace" calls */ | ||
2019 | static struct malloc_state _gm_; | ||
2020 | #define gm (&_gm_) | ||
2021 | #define is_global(M) ((M) == &_gm_) | ||
2022 | #define is_initialized(M) ((M)->top != 0) | ||
2023 | |||
2024 | /* -------------------------- system alloc setup ------------------------- */ | ||
2025 | |||
2026 | /* Operations on mflags */ | ||
2027 | |||
2028 | #define use_lock(M) ((M)->mflags & USE_LOCK_BIT) | ||
2029 | #define enable_lock(M) ((M)->mflags |= USE_LOCK_BIT) | ||
2030 | #define disable_lock(M) ((M)->mflags &= ~USE_LOCK_BIT) | ||
2031 | |||
2032 | #define use_mmap(M) ((M)->mflags & USE_MMAP_BIT) | ||
2033 | #define enable_mmap(M) ((M)->mflags |= USE_MMAP_BIT) | ||
2034 | #define disable_mmap(M) ((M)->mflags &= ~USE_MMAP_BIT) | ||
2035 | |||
2036 | #define use_noncontiguous(M) ((M)->mflags & USE_NONCONTIGUOUS_BIT) | ||
2037 | #define disable_contiguous(M) ((M)->mflags |= USE_NONCONTIGUOUS_BIT) | ||
2038 | |||
2039 | #define set_lock(M,L)\ | ||
2040 | ((M)->mflags = (L)?\ | ||
2041 | ((M)->mflags | USE_LOCK_BIT) :\ | ||
2042 | ((M)->mflags & ~USE_LOCK_BIT)) | ||
2043 | |||
2044 | /* page-align a size */ | ||
2045 | #define page_align(S)\ | ||
2046 | (((S) + (mparams.page_size)) & ~(mparams.page_size - SIZE_T_ONE)) | ||
2047 | |||
2048 | /* granularity-align a size */ | ||
2049 | #define granularity_align(S)\ | ||
2050 | (((S) + (mparams.granularity)) & ~(mparams.granularity - SIZE_T_ONE)) | ||
2051 | |||
2052 | #define is_page_aligned(S)\ | ||
2053 | (((size_t)(S) & (mparams.page_size - SIZE_T_ONE)) == 0) | ||
2054 | #define is_granularity_aligned(S)\ | ||
2055 | (((size_t)(S) & (mparams.granularity - SIZE_T_ONE)) == 0) | ||
2056 | |||
2057 | /* True if segment S holds address A */ | ||
2058 | #define segment_holds(S, A)\ | ||
2059 | ((char*)(A) >= S->base && (char*)(A) < S->base + S->size) | ||
2060 | |||
2061 | /* Return segment holding given address */ | ||
2062 | static msegmentptr segment_holding(mstate m, char* addr) { | ||
2063 | msegmentptr sp = &m->seg; | ||
2064 | for (;;) { | ||
2065 | if (addr >= sp->base && addr < sp->base + sp->size) | ||
2066 | return sp; | ||
2067 | if ((sp = sp->next) == 0) | ||
2068 | return 0; | ||
2069 | } | ||
2070 | } | ||
2071 | |||
2072 | /* Return true if segment contains a segment link */ | ||
2073 | static int has_segment_link(mstate m, msegmentptr ss) { | ||
2074 | msegmentptr sp = &m->seg; | ||
2075 | for (;;) { | ||
2076 | if ((char*)sp >= ss->base && (char*)sp < ss->base + ss->size) | ||
2077 | return 1; | ||
2078 | if ((sp = sp->next) == 0) | ||
2079 | return 0; | ||
2080 | } | ||
2081 | } | ||
2082 | |||
2083 | #ifndef MORECORE_CANNOT_TRIM | ||
2084 | #define should_trim(M,s) ((s) > (M)->trim_check) | ||
2085 | #else /* MORECORE_CANNOT_TRIM */ | ||
2086 | #define should_trim(M,s) (0) | ||
2087 | #endif /* MORECORE_CANNOT_TRIM */ | ||
2088 | |||
2089 | /* | ||
2090 | TOP_FOOT_SIZE is padding at the end of a segment, including space | ||
2091 | that may be needed to place segment records and fenceposts when new | ||
2092 | noncontiguous segments are added. | ||
2093 | */ | ||
2094 | #define TOP_FOOT_SIZE\ | ||
2095 | (align_offset(chunk2mem(0))+pad_request(sizeof(struct malloc_segment))+MIN_CHUNK_SIZE) | ||
2096 | |||
2097 | |||
2098 | /* ------------------------------- Hooks -------------------------------- */ | ||
2099 | |||
2100 | /* | ||
2101 | PREACTION should be defined to return 0 on success, and nonzero on | ||
2102 | failure. If you are not using locking, you can redefine these to do | ||
2103 | anything you like. | ||
2104 | */ | ||
2105 | |||
2106 | #if USE_LOCKS | ||
2107 | |||
2108 | /* Ensure locks are initialized */ | ||
2109 | #define GLOBALLY_INITIALIZE() (mparams.page_size == 0 && init_mparams()) | ||
2110 | |||
2111 | #define PREACTION(M) ((GLOBALLY_INITIALIZE() || use_lock(M))? ACQUIRE_LOCK(&(M)->mutex) : 0) | ||
2112 | #define POSTACTION(M) { if (use_lock(M)) RELEASE_LOCK(&(M)->mutex); } | ||
2113 | #else /* USE_LOCKS */ | ||
2114 | |||
2115 | #ifndef PREACTION | ||
2116 | #define PREACTION(M) (0) | ||
2117 | #endif /* PREACTION */ | ||
2118 | |||
2119 | #ifndef POSTACTION | ||
2120 | #define POSTACTION(M) | ||
2121 | #endif /* POSTACTION */ | ||
2122 | |||
2123 | #endif /* USE_LOCKS */ | ||
2124 | |||
2125 | /* | ||
2126 | CORRUPTION_ERROR_ACTION is triggered upon detected bad addresses. | ||
2127 | USAGE_ERROR_ACTION is triggered on detected bad frees and | ||
2128 | reallocs. The argument p is an address that might have triggered the | ||
2129 | fault. It is ignored by the two predefined actions, but might be | ||
2130 | useful in custom actions that try to help diagnose errors. | ||
2131 | */ | ||
2132 | |||
2133 | #if PROCEED_ON_ERROR | ||
2134 | |||
2135 | /* A count of the number of corruption errors causing resets */ | ||
2136 | int malloc_corruption_error_count; | ||
2137 | |||
2138 | /* default corruption action */ | ||
2139 | static void reset_on_error(mstate m); | ||
2140 | |||
2141 | #define CORRUPTION_ERROR_ACTION(m) reset_on_error(m) | ||
2142 | #define USAGE_ERROR_ACTION(m, p) | ||
2143 | |||
2144 | #else /* PROCEED_ON_ERROR */ | ||
2145 | |||
2146 | #ifndef CORRUPTION_ERROR_ACTION | ||
2147 | #define CORRUPTION_ERROR_ACTION(m) ABORT | ||
2148 | #endif /* CORRUPTION_ERROR_ACTION */ | ||
2149 | |||
2150 | #ifndef USAGE_ERROR_ACTION | ||
2151 | #define USAGE_ERROR_ACTION(m,p) ABORT | ||
2152 | #endif /* USAGE_ERROR_ACTION */ | ||
2153 | |||
2154 | #endif /* PROCEED_ON_ERROR */ | ||
2155 | |||
2156 | /* -------------------------- Debugging setup ---------------------------- */ | ||
2157 | |||
2158 | #if ! DEBUG | ||
2159 | |||
2160 | #define check_free_chunk(M,P) | ||
2161 | #define check_inuse_chunk(M,P) | ||
2162 | #define check_malloced_chunk(M,P,N) | ||
2163 | #define check_mmapped_chunk(M,P) | ||
2164 | #define check_malloc_state(M) | ||
2165 | #define check_top_chunk(M,P) | ||
2166 | |||
2167 | #else /* DEBUG */ | ||
2168 | #define check_free_chunk(M,P) do_check_free_chunk(M,P) | ||
2169 | #define check_inuse_chunk(M,P) do_check_inuse_chunk(M,P) | ||
2170 | #define check_top_chunk(M,P) do_check_top_chunk(M,P) | ||
2171 | #define check_malloced_chunk(M,P,N) do_check_malloced_chunk(M,P,N) | ||
2172 | #define check_mmapped_chunk(M,P) do_check_mmapped_chunk(M,P) | ||
2173 | #define check_malloc_state(M) do_check_malloc_state(M) | ||
2174 | |||
2175 | static void do_check_any_chunk(mstate m, mchunkptr p); | ||
2176 | static void do_check_top_chunk(mstate m, mchunkptr p); | ||
2177 | static void do_check_mmapped_chunk(mstate m, mchunkptr p); | ||
2178 | static void do_check_inuse_chunk(mstate m, mchunkptr p); | ||
2179 | static void do_check_free_chunk(mstate m, mchunkptr p); | ||
2180 | static void do_check_malloced_chunk(mstate m, void* mem, size_t s); | ||
2181 | static void do_check_tree(mstate m, tchunkptr t); | ||
2182 | static void do_check_treebin(mstate m, bindex_t i); | ||
2183 | static void do_check_smallbin(mstate m, bindex_t i); | ||
2184 | static void do_check_malloc_state(mstate m); | ||
2185 | static int bin_find(mstate m, mchunkptr x); | ||
2186 | static size_t traverse_and_check(mstate m); | ||
2187 | #endif /* DEBUG */ | ||
2188 | |||
2189 | /* ---------------------------- Indexing Bins ---------------------------- */ | ||
2190 | |||
2191 | #define is_small(s) (((s) >> SMALLBIN_SHIFT) < NSMALLBINS) | ||
2192 | #define small_index(s) ((s) >> SMALLBIN_SHIFT) | ||
2193 | #define small_index2size(i) ((i) << SMALLBIN_SHIFT) | ||
2194 | #define MIN_SMALL_INDEX (small_index(MIN_CHUNK_SIZE)) | ||
2195 | |||
2196 | /* addressing by index. See above about smallbin repositioning */ | ||
2197 | #define smallbin_at(M, i) ((sbinptr)((char*)&((M)->smallbins[(i)<<1]))) | ||
2198 | #define treebin_at(M,i) (&((M)->treebins[i])) | ||
2199 | |||
2200 | /* assign tree index for size S to variable I */ | ||
2201 | #if defined(__GNUC__) && defined(i386) | ||
2202 | #define compute_tree_index(S, I)\ | ||
2203 | {\ | ||
2204 | size_t X = S >> TREEBIN_SHIFT;\ | ||
2205 | if (X == 0)\ | ||
2206 | I = 0;\ | ||
2207 | else if (X > 0xFFFF)\ | ||
2208 | I = NTREEBINS-1;\ | ||
2209 | else {\ | ||
2210 | unsigned int K;\ | ||
2211 | __asm__("bsrl %1,%0\n\t" : "=r" (K) : "rm" (X));\ | ||
2212 | I = (bindex_t)((K << 1) + ((S >> (K + (TREEBIN_SHIFT-1)) & 1)));\ | ||
2213 | }\ | ||
2214 | } | ||
2215 | #else /* GNUC */ | ||
2216 | #define compute_tree_index(S, I)\ | ||
2217 | {\ | ||
2218 | size_t X = S >> TREEBIN_SHIFT;\ | ||
2219 | if (X == 0)\ | ||
2220 | I = 0;\ | ||
2221 | else if (X > 0xFFFF)\ | ||
2222 | I = NTREEBINS-1;\ | ||
2223 | else {\ | ||
2224 | unsigned int Y = (unsigned int)X;\ | ||
2225 | unsigned int N = ((Y - 0x100) >> 16) & 8;\ | ||
2226 | unsigned int K = (((Y <<= N) - 0x1000) >> 16) & 4;\ | ||
2227 | N += K;\ | ||
2228 | N += K = (((Y <<= K) - 0x4000) >> 16) & 2;\ | ||
2229 | K = 14 - N + ((Y <<= K) >> 15);\ | ||
2230 | I = (K << 1) + ((S >> (K + (TREEBIN_SHIFT-1)) & 1));\ | ||
2231 | }\ | ||
2232 | } | ||
2233 | #endif /* GNUC */ | ||
2234 | |||
2235 | /* Bit representing maximum resolved size in a treebin at i */ | ||
2236 | #define bit_for_tree_index(i) \ | ||
2237 | (i == NTREEBINS-1)? (SIZE_T_BITSIZE-1) : (((i) >> 1) + TREEBIN_SHIFT - 2) | ||
2238 | |||
2239 | /* Shift placing maximum resolved bit in a treebin at i as sign bit */ | ||
2240 | #define leftshift_for_tree_index(i) \ | ||
2241 | ((i == NTREEBINS-1)? 0 : \ | ||
2242 | ((SIZE_T_BITSIZE-SIZE_T_ONE) - (((i) >> 1) + TREEBIN_SHIFT - 2))) | ||
2243 | |||
2244 | /* The size of the smallest chunk held in bin with index i */ | ||
2245 | #define minsize_for_tree_index(i) \ | ||
2246 | ((SIZE_T_ONE << (((i) >> 1) + TREEBIN_SHIFT)) | \ | ||
2247 | (((size_t)((i) & SIZE_T_ONE)) << (((i) >> 1) + TREEBIN_SHIFT - 1))) | ||
2248 | |||
2249 | |||
2250 | /* ------------------------ Operations on bin maps ----------------------- */ | ||
2251 | |||
2252 | /* bit corresponding to given index */ | ||
2253 | #define idx2bit(i) ((binmap_t)(1) << (i)) | ||
2254 | |||
2255 | /* Mark/Clear bits with given index */ | ||
2256 | #define mark_smallmap(M,i) ((M)->smallmap |= idx2bit(i)) | ||
2257 | #define clear_smallmap(M,i) ((M)->smallmap &= ~idx2bit(i)) | ||
2258 | #define smallmap_is_marked(M,i) ((M)->smallmap & idx2bit(i)) | ||
2259 | |||
2260 | #define mark_treemap(M,i) ((M)->treemap |= idx2bit(i)) | ||
2261 | #define clear_treemap(M,i) ((M)->treemap &= ~idx2bit(i)) | ||
2262 | #define treemap_is_marked(M,i) ((M)->treemap & idx2bit(i)) | ||
2263 | |||
2264 | /* index corresponding to given bit */ | ||
2265 | |||
2266 | #if defined(__GNUC__) && defined(i386) | ||
2267 | #define compute_bit2idx(X, I)\ | ||
2268 | {\ | ||
2269 | unsigned int J;\ | ||
2270 | __asm__("bsfl %1,%0\n\t" : "=r" (J) : "rm" (X));\ | ||
2271 | I = (bindex_t)J;\ | ||
2272 | } | ||
2273 | |||
2274 | #else /* GNUC */ | ||
2275 | #if USE_BUILTIN_FFS | ||
2276 | #define compute_bit2idx(X, I) I = ffs(X)-1 | ||
2277 | |||
2278 | #else /* USE_BUILTIN_FFS */ | ||
2279 | #define compute_bit2idx(X, I)\ | ||
2280 | {\ | ||
2281 | unsigned int Y = X - 1;\ | ||
2282 | unsigned int K = Y >> (16-4) & 16;\ | ||
2283 | unsigned int N = K; Y >>= K;\ | ||
2284 | N += K = Y >> (8-3) & 8; Y >>= K;\ | ||
2285 | N += K = Y >> (4-2) & 4; Y >>= K;\ | ||
2286 | N += K = Y >> (2-1) & 2; Y >>= K;\ | ||
2287 | N += K = Y >> (1-0) & 1; Y >>= K;\ | ||
2288 | I = (bindex_t)(N + Y);\ | ||
2289 | } | ||
2290 | #endif /* USE_BUILTIN_FFS */ | ||
2291 | #endif /* GNUC */ | ||
2292 | |||
2293 | /* isolate the least set bit of a bitmap */ | ||
2294 | #define least_bit(x) ((x) & -(x)) | ||
2295 | |||
2296 | /* mask with all bits to left of least bit of x on */ | ||
2297 | #define left_bits(x) ((x<<1) | -(x<<1)) | ||
2298 | |||
2299 | /* mask with all bits to left of or equal to least bit of x on */ | ||
2300 | #define same_or_left_bits(x) ((x) | -(x)) | ||
2301 | |||
2302 | |||
2303 | /* ----------------------- Runtime Check Support ------------------------- */ | ||
2304 | |||
2305 | /* | ||
2306 | For security, the main invariant is that malloc/free/etc never | ||
2307 | writes to a static address other than malloc_state, unless static | ||
2308 | malloc_state itself has been corrupted, which cannot occur via | ||
2309 | malloc (because of these checks). In essence this means that we | ||
2310 | believe all pointers, sizes, maps etc held in malloc_state, but | ||
2311 | check all of those linked or offsetted from other embedded data | ||
2312 | structures. These checks are interspersed with main code in a way | ||
2313 | that tends to minimize their run-time cost. | ||
2314 | |||
2315 | When FOOTERS is defined, in addition to range checking, we also | ||
2316 | verify footer fields of inuse chunks, which can be used guarantee | ||
2317 | that the mstate controlling malloc/free is intact. This is a | ||
2318 | streamlined version of the approach described by William Robertson | ||
2319 | et al in "Run-time Detection of Heap-based Overflows" LISA'03 | ||
2320 | http://www.usenix.org/events/lisa03/tech/robertson.html The footer | ||
2321 | of an inuse chunk holds the xor of its mstate and a random seed, | ||
2322 | that is checked upon calls to free() and realloc(). This is | ||
2323 | (probablistically) unguessable from outside the program, but can be | ||
2324 | computed by any code successfully malloc'ing any chunk, so does not | ||
2325 | itself provide protection against code that has already broken | ||
2326 | security through some other means. Unlike Robertson et al, we | ||
2327 | always dynamically check addresses of all offset chunks (previous, | ||
2328 | next, etc). This turns out to be cheaper than relying on hashes. | ||
2329 | */ | ||
2330 | |||
2331 | #if !INSECURE | ||
2332 | /* Check if address a is at least as high as any from MORECORE or MMAP */ | ||
2333 | #define ok_address(M, a) ((char*)(a) >= (M)->least_addr) | ||
2334 | /* Check if address of next chunk n is higher than base chunk p */ | ||
2335 | #define ok_next(p, n) ((char*)(p) < (char*)(n)) | ||
2336 | /* Check if p has its cinuse bit on */ | ||
2337 | #define ok_cinuse(p) cinuse(p) | ||
2338 | /* Check if p has its pinuse bit on */ | ||
2339 | #define ok_pinuse(p) pinuse(p) | ||
2340 | |||
2341 | #else /* !INSECURE */ | ||
2342 | #define ok_address(M, a) (1) | ||
2343 | #define ok_next(b, n) (1) | ||
2344 | #define ok_cinuse(p) (1) | ||
2345 | #define ok_pinuse(p) (1) | ||
2346 | #endif /* !INSECURE */ | ||
2347 | |||
2348 | #if (FOOTERS && !INSECURE) | ||
2349 | /* Check if (alleged) mstate m has expected magic field */ | ||
2350 | #define ok_magic(M) ((M)->magic == mparams.magic) | ||
2351 | #else /* (FOOTERS && !INSECURE) */ | ||
2352 | #define ok_magic(M) (1) | ||
2353 | #endif /* (FOOTERS && !INSECURE) */ | ||
2354 | |||
2355 | |||
2356 | /* In gcc, use __builtin_expect to minimize impact of checks */ | ||
2357 | #if !INSECURE | ||
2358 | #if defined(__GNUC__) && __GNUC__ >= 3 | ||
2359 | #define RTCHECK(e) __builtin_expect(e, 1) | ||
2360 | #else /* GNUC */ | ||
2361 | #define RTCHECK(e) (e) | ||
2362 | #endif /* GNUC */ | ||
2363 | #else /* !INSECURE */ | ||
2364 | #define RTCHECK(e) (1) | ||
2365 | #endif /* !INSECURE */ | ||
2366 | |||
2367 | /* macros to set up inuse chunks with or without footers */ | ||
2368 | |||
2369 | #if !FOOTERS | ||
2370 | |||
2371 | #define mark_inuse_foot(M,p,s) | ||
2372 | |||
2373 | /* Set cinuse bit and pinuse bit of next chunk */ | ||
2374 | #define set_inuse(M,p,s)\ | ||
2375 | ((p)->head = (((p)->head & PINUSE_BIT)|s|CINUSE_BIT),\ | ||
2376 | ((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT) | ||
2377 | |||
2378 | /* Set cinuse and pinuse of this chunk and pinuse of next chunk */ | ||
2379 | #define set_inuse_and_pinuse(M,p,s)\ | ||
2380 | ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\ | ||
2381 | ((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT) | ||
2382 | |||
2383 | /* Set size, cinuse and pinuse bit of this chunk */ | ||
2384 | #define set_size_and_pinuse_of_inuse_chunk(M, p, s)\ | ||
2385 | ((p)->head = (s|PINUSE_BIT|CINUSE_BIT)) | ||
2386 | |||
2387 | #else /* FOOTERS */ | ||
2388 | |||
2389 | /* Set foot of inuse chunk to be xor of mstate and seed */ | ||
2390 | #define mark_inuse_foot(M,p,s)\ | ||
2391 | (((mchunkptr)((char*)(p) + (s)))->prev_foot = ((size_t)(M) ^ mparams.magic)) | ||
2392 | |||
2393 | #define get_mstate_for(p)\ | ||
2394 | ((mstate)(((mchunkptr)((char*)(p) +\ | ||
2395 | (chunksize(p))))->prev_foot ^ mparams.magic)) | ||
2396 | |||
2397 | #define set_inuse(M,p,s)\ | ||
2398 | ((p)->head = (((p)->head & PINUSE_BIT)|s|CINUSE_BIT),\ | ||
2399 | (((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT), \ | ||
2400 | mark_inuse_foot(M,p,s)) | ||
2401 | |||
2402 | #define set_inuse_and_pinuse(M,p,s)\ | ||
2403 | ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\ | ||
2404 | (((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT),\ | ||
2405 | mark_inuse_foot(M,p,s)) | ||
2406 | |||
2407 | #define set_size_and_pinuse_of_inuse_chunk(M, p, s)\ | ||
2408 | ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\ | ||
2409 | mark_inuse_foot(M, p, s)) | ||
2410 | |||
2411 | #endif /* !FOOTERS */ | ||
2412 | |||
2413 | /* ---------------------------- setting mparams -------------------------- */ | ||
2414 | |||
2415 | /* Initialize mparams */ | ||
2416 | static int init_mparams(void) { | ||
2417 | if (mparams.page_size == 0) { | ||
2418 | size_t s; | ||
2419 | |||
2420 | mparams.mmap_threshold = DEFAULT_MMAP_THRESHOLD; | ||
2421 | mparams.trim_threshold = DEFAULT_TRIM_THRESHOLD; | ||
2422 | #if MORECORE_CONTIGUOUS | ||
2423 | mparams.default_mflags = USE_LOCK_BIT|USE_MMAP_BIT; | ||
2424 | #else /* MORECORE_CONTIGUOUS */ | ||
2425 | mparams.default_mflags = USE_LOCK_BIT|USE_MMAP_BIT|USE_NONCONTIGUOUS_BIT; | ||
2426 | #endif /* MORECORE_CONTIGUOUS */ | ||
2427 | |||
2428 | #if (FOOTERS && !INSECURE) | ||
2429 | { | ||
2430 | #if USE_DEV_RANDOM | ||
2431 | int fd; | ||
2432 | unsigned char buf[sizeof(size_t)]; | ||
2433 | /* Try to use /dev/urandom, else fall back on using time */ | ||
2434 | if ((fd = open("/dev/urandom", O_RDONLY)) >= 0 && | ||
2435 | read(fd, buf, sizeof(buf)) == sizeof(buf)) { | ||
2436 | s = *((size_t *) buf); | ||
2437 | close(fd); | ||
2438 | } | ||
2439 | else | ||
2440 | #endif /* USE_DEV_RANDOM */ | ||
2441 | s = (size_t)(time(0) ^ (size_t)0x55555555U); | ||
2442 | |||
2443 | s |= (size_t)8U; /* ensure nonzero */ | ||
2444 | s &= ~(size_t)7U; /* improve chances of fault for bad values */ | ||
2445 | |||
2446 | } | ||
2447 | #else /* (FOOTERS && !INSECURE) */ | ||
2448 | s = (size_t)0x58585858U; | ||
2449 | #endif /* (FOOTERS && !INSECURE) */ | ||
2450 | ACQUIRE_MAGIC_INIT_LOCK(); | ||
2451 | if (mparams.magic == 0) { | ||
2452 | mparams.magic = s; | ||
2453 | /* Set up lock for main malloc area */ | ||
2454 | INITIAL_LOCK(&gm->mutex); | ||
2455 | gm->mflags = mparams.default_mflags; | ||
2456 | } | ||
2457 | RELEASE_MAGIC_INIT_LOCK(); | ||
2458 | |||
2459 | #ifndef WIN32 | ||
2460 | mparams.page_size = malloc_getpagesize; | ||
2461 | mparams.granularity = ((DEFAULT_GRANULARITY != 0)? | ||
2462 | DEFAULT_GRANULARITY : mparams.page_size); | ||
2463 | #else /* WIN32 */ | ||
2464 | { | ||
2465 | SYSTEM_INFO system_info; | ||
2466 | GetSystemInfo(&system_info); | ||
2467 | mparams.page_size = system_info.dwPageSize; | ||
2468 | mparams.granularity = system_info.dwAllocationGranularity; | ||
2469 | } | ||
2470 | #endif /* WIN32 */ | ||
2471 | |||
2472 | /* Sanity-check configuration: | ||
2473 | size_t must be unsigned and as wide as pointer type. | ||
2474 | ints must be at least 4 bytes. | ||
2475 | alignment must be at least 8. | ||
2476 | Alignment, min chunk size, and page size must all be powers of 2. | ||
2477 | */ | ||
2478 | if ((sizeof(size_t) != sizeof(char*)) || | ||
2479 | (MAX_SIZE_T < MIN_CHUNK_SIZE) || | ||
2480 | (sizeof(int) < 4) || | ||
2481 | (MALLOC_ALIGNMENT < (size_t)8U) || | ||
2482 | ((MALLOC_ALIGNMENT & (MALLOC_ALIGNMENT-SIZE_T_ONE)) != 0) || | ||
2483 | ((MCHUNK_SIZE & (MCHUNK_SIZE-SIZE_T_ONE)) != 0) || | ||
2484 | ((mparams.granularity & (mparams.granularity-SIZE_T_ONE)) != 0) || | ||
2485 | ((mparams.page_size & (mparams.page_size-SIZE_T_ONE)) != 0)) | ||
2486 | ABORT; | ||
2487 | } | ||
2488 | return 0; | ||
2489 | } | ||
2490 | |||
2491 | /* support for mallopt */ | ||
2492 | static int change_mparam(int param_number, int value) { | ||
2493 | size_t val = (size_t)value; | ||
2494 | init_mparams(); | ||
2495 | switch(param_number) { | ||
2496 | case M_TRIM_THRESHOLD: | ||
2497 | mparams.trim_threshold = val; | ||
2498 | return 1; | ||
2499 | case M_GRANULARITY: | ||
2500 | if (val >= mparams.page_size && ((val & (val-1)) == 0)) { | ||
2501 | mparams.granularity = val; | ||
2502 | return 1; | ||
2503 | } | ||
2504 | else | ||
2505 | return 0; | ||
2506 | case M_MMAP_THRESHOLD: | ||
2507 | mparams.mmap_threshold = val; | ||
2508 | return 1; | ||
2509 | default: | ||
2510 | return 0; | ||
2511 | } | ||
2512 | } | ||
2513 | |||
2514 | #if DEBUG | ||
2515 | /* ------------------------- Debugging Support --------------------------- */ | ||
2516 | |||
2517 | /* Check properties of any chunk, whether free, inuse, mmapped etc */ | ||
2518 | static void do_check_any_chunk(mstate m, mchunkptr p) { | ||
2519 | assert((is_aligned(chunk2mem(p))) || (p->head == FENCEPOST_HEAD)); | ||
2520 | assert(ok_address(m, p)); | ||
2521 | } | ||
2522 | |||
2523 | /* Check properties of top chunk */ | ||
2524 | static void do_check_top_chunk(mstate m, mchunkptr p) { | ||
2525 | msegmentptr sp = segment_holding(m, (char*)p); | ||
2526 | size_t sz = chunksize(p); | ||
2527 | assert(sp != 0); | ||
2528 | assert((is_aligned(chunk2mem(p))) || (p->head == FENCEPOST_HEAD)); | ||
2529 | assert(ok_address(m, p)); | ||
2530 | assert(sz == m->topsize); | ||
2531 | assert(sz > 0); | ||
2532 | assert(sz == ((sp->base + sp->size) - (char*)p) - TOP_FOOT_SIZE); | ||
2533 | assert(pinuse(p)); | ||
2534 | assert(!next_pinuse(p)); | ||
2535 | } | ||
2536 | |||
2537 | /* Check properties of (inuse) mmapped chunks */ | ||
2538 | static void do_check_mmapped_chunk(mstate m, mchunkptr p) { | ||
2539 | size_t sz = chunksize(p); | ||
2540 | size_t len = (sz + (p->prev_foot & ~IS_MMAPPED_BIT) + MMAP_FOOT_PAD); | ||
2541 | assert(is_mmapped(p)); | ||
2542 | assert(use_mmap(m)); | ||
2543 | assert((is_aligned(chunk2mem(p))) || (p->head == FENCEPOST_HEAD)); | ||
2544 | assert(ok_address(m, p)); | ||
2545 | assert(!is_small(sz)); | ||
2546 | assert((len & (mparams.page_size-SIZE_T_ONE)) == 0); | ||
2547 | assert(chunk_plus_offset(p, sz)->head == FENCEPOST_HEAD); | ||
2548 | assert(chunk_plus_offset(p, sz+SIZE_T_SIZE)->head == 0); | ||
2549 | } | ||
2550 | |||
2551 | /* Check properties of inuse chunks */ | ||
2552 | static void do_check_inuse_chunk(mstate m, mchunkptr p) { | ||
2553 | do_check_any_chunk(m, p); | ||
2554 | assert(cinuse(p)); | ||
2555 | assert(next_pinuse(p)); | ||
2556 | /* If not pinuse and not mmapped, previous chunk has OK offset */ | ||
2557 | assert(is_mmapped(p) || pinuse(p) || next_chunk(prev_chunk(p)) == p); | ||
2558 | if (is_mmapped(p)) | ||
2559 | do_check_mmapped_chunk(m, p); | ||
2560 | } | ||
2561 | |||
2562 | /* Check properties of free chunks */ | ||
2563 | static void do_check_free_chunk(mstate m, mchunkptr p) { | ||
2564 | size_t sz = p->head & ~(PINUSE_BIT|CINUSE_BIT); | ||
2565 | mchunkptr next = chunk_plus_offset(p, sz); | ||
2566 | do_check_any_chunk(m, p); | ||
2567 | assert(!cinuse(p)); | ||
2568 | assert(!next_pinuse(p)); | ||
2569 | assert (!is_mmapped(p)); | ||
2570 | if (p != m->dv && p != m->top) { | ||
2571 | if (sz >= MIN_CHUNK_SIZE) { | ||
2572 | assert((sz & CHUNK_ALIGN_MASK) == 0); | ||
2573 | assert(is_aligned(chunk2mem(p))); | ||
2574 | assert(next->prev_foot == sz); | ||
2575 | assert(pinuse(p)); | ||
2576 | assert (next == m->top || cinuse(next)); | ||
2577 | assert(p->fd->bk == p); | ||
2578 | assert(p->bk->fd == p); | ||
2579 | } | ||
2580 | else /* markers are always of size SIZE_T_SIZE */ | ||
2581 | assert(sz == SIZE_T_SIZE); | ||
2582 | } | ||
2583 | } | ||
2584 | |||
2585 | /* Check properties of malloced chunks at the point they are malloced */ | ||
2586 | static void do_check_malloced_chunk(mstate m, void* mem, size_t s) { | ||
2587 | if (mem != 0) { | ||
2588 | mchunkptr p = mem2chunk(mem); | ||
2589 | size_t sz = p->head & ~(PINUSE_BIT|CINUSE_BIT); | ||
2590 | do_check_inuse_chunk(m, p); | ||
2591 | assert((sz & CHUNK_ALIGN_MASK) == 0); | ||
2592 | assert(sz >= MIN_CHUNK_SIZE); | ||
2593 | assert(sz >= s); | ||
2594 | /* unless mmapped, size is less than MIN_CHUNK_SIZE more than request */ | ||
2595 | assert(is_mmapped(p) || sz < (s + MIN_CHUNK_SIZE)); | ||
2596 | } | ||
2597 | } | ||
2598 | |||
2599 | /* Check a tree and its subtrees. */ | ||
2600 | static void do_check_tree(mstate m, tchunkptr t) { | ||
2601 | tchunkptr head = 0; | ||
2602 | tchunkptr u = t; | ||
2603 | bindex_t tindex = t->index; | ||
2604 | size_t tsize = chunksize(t); | ||
2605 | bindex_t idx; | ||
2606 | compute_tree_index(tsize, idx); | ||
2607 | assert(tindex == idx); | ||
2608 | assert(tsize >= MIN_LARGE_SIZE); | ||
2609 | assert(tsize >= minsize_for_tree_index(idx)); | ||
2610 | assert((idx == NTREEBINS-1) || (tsize < minsize_for_tree_index((idx+1)))); | ||
2611 | |||
2612 | do { /* traverse through chain of same-sized nodes */ | ||
2613 | do_check_any_chunk(m, ((mchunkptr)u)); | ||
2614 | assert(u->index == tindex); | ||
2615 | assert(chunksize(u) == tsize); | ||
2616 | assert(!cinuse(u)); | ||
2617 | assert(!next_pinuse(u)); | ||
2618 | assert(u->fd->bk == u); | ||
2619 | assert(u->bk->fd == u); | ||
2620 | if (u->parent == 0) { | ||
2621 | assert(u->child[0] == 0); | ||
2622 | assert(u->child[1] == 0); | ||
2623 | } | ||
2624 | else { | ||
2625 | assert(head == 0); /* only one node on chain has parent */ | ||
2626 | head = u; | ||
2627 | assert(u->parent != u); | ||
2628 | assert (u->parent->child[0] == u || | ||
2629 | u->parent->child[1] == u || | ||
2630 | *((tbinptr*)(u->parent)) == u); | ||
2631 | if (u->child[0] != 0) { | ||
2632 | assert(u->child[0]->parent == u); | ||
2633 | assert(u->child[0] != u); | ||
2634 | do_check_tree(m, u->child[0]); | ||
2635 | } | ||
2636 | if (u->child[1] != 0) { | ||
2637 | assert(u->child[1]->parent == u); | ||
2638 | assert(u->child[1] != u); | ||
2639 | do_check_tree(m, u->child[1]); | ||
2640 | } | ||
2641 | if (u->child[0] != 0 && u->child[1] != 0) { | ||
2642 | assert(chunksize(u->child[0]) < chunksize(u->child[1])); | ||
2643 | } | ||
2644 | } | ||
2645 | u = u->fd; | ||
2646 | } while (u != t); | ||
2647 | assert(head != 0); | ||
2648 | } | ||
2649 | |||
2650 | /* Check all the chunks in a treebin. */ | ||
2651 | static void do_check_treebin(mstate m, bindex_t i) { | ||
2652 | tbinptr* tb = treebin_at(m, i); | ||
2653 | tchunkptr t = *tb; | ||
2654 | int empty = (m->treemap & (1U << i)) == 0; | ||
2655 | if (t == 0) | ||
2656 | assert(empty); | ||
2657 | if (!empty) | ||
2658 | do_check_tree(m, t); | ||
2659 | } | ||
2660 | |||
2661 | /* Check all the chunks in a smallbin. */ | ||
2662 | static void do_check_smallbin(mstate m, bindex_t i) { | ||
2663 | sbinptr b = smallbin_at(m, i); | ||
2664 | mchunkptr p = b->bk; | ||
2665 | unsigned int empty = (m->smallmap & (1U << i)) == 0; | ||
2666 | if (p == b) | ||
2667 | assert(empty); | ||
2668 | if (!empty) { | ||
2669 | for (; p != b; p = p->bk) { | ||
2670 | size_t size = chunksize(p); | ||
2671 | mchunkptr q; | ||
2672 | /* each chunk claims to be free */ | ||
2673 | do_check_free_chunk(m, p); | ||
2674 | /* chunk belongs in bin */ | ||
2675 | assert(small_index(size) == i); | ||
2676 | assert(p->bk == b || chunksize(p->bk) == chunksize(p)); | ||
2677 | /* chunk is followed by an inuse chunk */ | ||
2678 | q = next_chunk(p); | ||
2679 | if (q->head != FENCEPOST_HEAD) | ||
2680 | do_check_inuse_chunk(m, q); | ||
2681 | } | ||
2682 | } | ||
2683 | } | ||
2684 | |||
2685 | /* Find x in a bin. Used in other check functions. */ | ||
2686 | static int bin_find(mstate m, mchunkptr x) { | ||
2687 | size_t size = chunksize(x); | ||
2688 | if (is_small(size)) { | ||
2689 | bindex_t sidx = small_index(size); | ||
2690 | sbinptr b = smallbin_at(m, sidx); | ||
2691 | if (smallmap_is_marked(m, sidx)) { | ||
2692 | mchunkptr p = b; | ||
2693 | do { | ||
2694 | if (p == x) | ||
2695 | return 1; | ||
2696 | } while ((p = p->fd) != b); | ||
2697 | } | ||
2698 | } | ||
2699 | else { | ||
2700 | bindex_t tidx; | ||
2701 | compute_tree_index(size, tidx); | ||
2702 | if (treemap_is_marked(m, tidx)) { | ||
2703 | tchunkptr t = *treebin_at(m, tidx); | ||
2704 | size_t sizebits = size << leftshift_for_tree_index(tidx); | ||
2705 | while (t != 0 && chunksize(t) != size) { | ||
2706 | t = t->child[(sizebits >> (SIZE_T_BITSIZE-SIZE_T_ONE)) & 1]; | ||
2707 | sizebits <<= 1; | ||
2708 | } | ||
2709 | if (t != 0) { | ||
2710 | tchunkptr u = t; | ||
2711 | do { | ||
2712 | if (u == (tchunkptr)x) | ||
2713 | return 1; | ||
2714 | } while ((u = u->fd) != t); | ||
2715 | } | ||
2716 | } | ||
2717 | } | ||
2718 | return 0; | ||
2719 | } | ||
2720 | |||
2721 | /* Traverse each chunk and check it; return total */ | ||
2722 | static size_t traverse_and_check(mstate m) { | ||
2723 | size_t sum = 0; | ||
2724 | if (is_initialized(m)) { | ||
2725 | msegmentptr s = &m->seg; | ||
2726 | sum += m->topsize + TOP_FOOT_SIZE; | ||
2727 | while (s != 0) { | ||
2728 | mchunkptr q = align_as_chunk(s->base); | ||
2729 | mchunkptr lastq = 0; | ||
2730 | assert(pinuse(q)); | ||
2731 | while (segment_holds(s, q) && | ||
2732 | q != m->top && q->head != FENCEPOST_HEAD) { | ||
2733 | sum += chunksize(q); | ||
2734 | if (cinuse(q)) { | ||
2735 | assert(!bin_find(m, q)); | ||
2736 | do_check_inuse_chunk(m, q); | ||
2737 | } | ||
2738 | else { | ||
2739 | assert(q == m->dv || bin_find(m, q)); | ||
2740 | assert(lastq == 0 || cinuse(lastq)); /* Not 2 consecutive free */ | ||
2741 | do_check_free_chunk(m, q); | ||
2742 | } | ||
2743 | lastq = q; | ||
2744 | q = next_chunk(q); | ||
2745 | } | ||
2746 | s = s->next; | ||
2747 | } | ||
2748 | } | ||
2749 | return sum; | ||
2750 | } | ||
2751 | |||
2752 | /* Check all properties of malloc_state. */ | ||
2753 | static void do_check_malloc_state(mstate m) { | ||
2754 | bindex_t i; | ||
2755 | size_t total; | ||
2756 | /* check bins */ | ||
2757 | for (i = 0; i < NSMALLBINS; ++i) | ||
2758 | do_check_smallbin(m, i); | ||
2759 | for (i = 0; i < NTREEBINS; ++i) | ||
2760 | do_check_treebin(m, i); | ||
2761 | |||
2762 | if (m->dvsize != 0) { /* check dv chunk */ | ||
2763 | do_check_any_chunk(m, m->dv); | ||
2764 | assert(m->dvsize == chunksize(m->dv)); | ||
2765 | assert(m->dvsize >= MIN_CHUNK_SIZE); | ||
2766 | assert(bin_find(m, m->dv) == 0); | ||
2767 | } | ||
2768 | |||
2769 | if (m->top != 0) { /* check top chunk */ | ||
2770 | do_check_top_chunk(m, m->top); | ||
2771 | assert(m->topsize == chunksize(m->top)); | ||
2772 | assert(m->topsize > 0); | ||
2773 | assert(bin_find(m, m->top) == 0); | ||
2774 | } | ||
2775 | |||
2776 | total = traverse_and_check(m); | ||
2777 | assert(total <= m->footprint); | ||
2778 | assert(m->footprint <= m->max_footprint); | ||
2779 | } | ||
2780 | #endif /* DEBUG */ | ||
2781 | |||
2782 | /* ----------------------------- statistics ------------------------------ */ | ||
2783 | |||
2784 | #if !NO_MALLINFO | ||
2785 | static struct mallinfo internal_mallinfo(mstate m) { | ||
2786 | struct mallinfo nm = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; | ||
2787 | if (!PREACTION(m)) { | ||
2788 | check_malloc_state(m); | ||
2789 | if (is_initialized(m)) { | ||
2790 | size_t nfree = SIZE_T_ONE; /* top always free */ | ||
2791 | size_t mfree = m->topsize + TOP_FOOT_SIZE; | ||
2792 | size_t sum = mfree; | ||
2793 | msegmentptr s = &m->seg; | ||
2794 | while (s != 0) { | ||
2795 | mchunkptr q = align_as_chunk(s->base); | ||
2796 | while (segment_holds(s, q) && | ||
2797 | q != m->top && q->head != FENCEPOST_HEAD) { | ||
2798 | size_t sz = chunksize(q); | ||
2799 | sum += sz; | ||
2800 | if (!cinuse(q)) { | ||
2801 | mfree += sz; | ||
2802 | ++nfree; | ||
2803 | } | ||
2804 | q = next_chunk(q); | ||
2805 | } | ||
2806 | s = s->next; | ||
2807 | } | ||
2808 | |||
2809 | nm.arena = sum; | ||
2810 | nm.ordblks = nfree; | ||
2811 | nm.hblkhd = m->footprint - sum; | ||
2812 | nm.usmblks = m->max_footprint; | ||
2813 | nm.uordblks = m->footprint - mfree; | ||
2814 | nm.fordblks = mfree; | ||
2815 | nm.keepcost = m->topsize; | ||
2816 | } | ||
2817 | |||
2818 | POSTACTION(m); | ||
2819 | } | ||
2820 | return nm; | ||
2821 | } | ||
2822 | #endif /* !NO_MALLINFO */ | ||
2823 | |||
2824 | static void internal_malloc_stats(mstate m) { | ||
2825 | if (!PREACTION(m)) { | ||
2826 | size_t maxfp = 0; | ||
2827 | size_t fp = 0; | ||
2828 | size_t used = 0; | ||
2829 | check_malloc_state(m); | ||
2830 | if (is_initialized(m)) { | ||
2831 | msegmentptr s = &m->seg; | ||
2832 | maxfp = m->max_footprint; | ||
2833 | fp = m->footprint; | ||
2834 | used = fp - (m->topsize + TOP_FOOT_SIZE); | ||
2835 | |||
2836 | while (s != 0) { | ||
2837 | mchunkptr q = align_as_chunk(s->base); | ||
2838 | while (segment_holds(s, q) && | ||
2839 | q != m->top && q->head != FENCEPOST_HEAD) { | ||
2840 | if (!cinuse(q)) | ||
2841 | used -= chunksize(q); | ||
2842 | q = next_chunk(q); | ||
2843 | } | ||
2844 | s = s->next; | ||
2845 | } | ||
2846 | } | ||
2847 | |||
2848 | DEBUGF("max system bytes = %10lu\n", (unsigned long)(maxfp)); | ||
2849 | DEBUGF("system bytes = %10lu\n", (unsigned long)(fp)); | ||
2850 | DEBUGF("in use bytes = %10lu\n", (unsigned long)(used)); | ||
2851 | |||
2852 | POSTACTION(m); | ||
2853 | } | ||
2854 | } | ||
2855 | |||
2856 | /* ----------------------- Operations on smallbins ----------------------- */ | ||
2857 | |||
2858 | /* | ||
2859 | Various forms of linking and unlinking are defined as macros. Even | ||
2860 | the ones for trees, which are very long but have very short typical | ||
2861 | paths. This is ugly but reduces reliance on inlining support of | ||
2862 | compilers. | ||
2863 | */ | ||
2864 | |||
2865 | /* Link a free chunk into a smallbin */ | ||
2866 | #define insert_small_chunk(M, P, S) {\ | ||
2867 | bindex_t I = small_index(S);\ | ||
2868 | mchunkptr B = smallbin_at(M, I);\ | ||
2869 | mchunkptr F = B;\ | ||
2870 | assert(S >= MIN_CHUNK_SIZE);\ | ||
2871 | if (!smallmap_is_marked(M, I))\ | ||
2872 | mark_smallmap(M, I);\ | ||
2873 | else if (RTCHECK(ok_address(M, B->fd)))\ | ||
2874 | F = B->fd;\ | ||
2875 | else {\ | ||
2876 | CORRUPTION_ERROR_ACTION(M);\ | ||
2877 | }\ | ||
2878 | B->fd = P;\ | ||
2879 | F->bk = P;\ | ||
2880 | P->fd = F;\ | ||
2881 | P->bk = B;\ | ||
2882 | } | ||
2883 | |||
2884 | /* Unlink a chunk from a smallbin */ | ||
2885 | #define unlink_small_chunk(M, P, S) {\ | ||
2886 | mchunkptr F = P->fd;\ | ||
2887 | mchunkptr B = P->bk;\ | ||
2888 | bindex_t I = small_index(S);\ | ||
2889 | assert(P != B);\ | ||
2890 | assert(P != F);\ | ||
2891 | assert(chunksize(P) == small_index2size(I));\ | ||
2892 | if (F == B)\ | ||
2893 | clear_smallmap(M, I);\ | ||
2894 | else if (RTCHECK((F == smallbin_at(M,I) || ok_address(M, F)) &&\ | ||
2895 | (B == smallbin_at(M,I) || ok_address(M, B)))) {\ | ||
2896 | F->bk = B;\ | ||
2897 | B->fd = F;\ | ||
2898 | }\ | ||
2899 | else {\ | ||
2900 | CORRUPTION_ERROR_ACTION(M);\ | ||
2901 | }\ | ||
2902 | } | ||
2903 | |||
2904 | /* Unlink the first chunk from a smallbin */ | ||
2905 | #define unlink_first_small_chunk(M, B, P, I) {\ | ||
2906 | mchunkptr F = P->fd;\ | ||
2907 | assert(P != B);\ | ||
2908 | assert(P != F);\ | ||
2909 | assert(chunksize(P) == small_index2size(I));\ | ||
2910 | if (B == F)\ | ||
2911 | clear_smallmap(M, I);\ | ||
2912 | else if (RTCHECK(ok_address(M, F))) {\ | ||
2913 | B->fd = F;\ | ||
2914 | F->bk = B;\ | ||
2915 | }\ | ||
2916 | else {\ | ||
2917 | CORRUPTION_ERROR_ACTION(M);\ | ||
2918 | }\ | ||
2919 | } | ||
2920 | |||
2921 | /* Replace dv node, binning the old one */ | ||
2922 | /* Used only when dvsize known to be small */ | ||
2923 | #define replace_dv(M, P, S) {\ | ||
2924 | size_t DVS = M->dvsize;\ | ||
2925 | if (DVS != 0) {\ | ||
2926 | mchunkptr DV = M->dv;\ | ||
2927 | assert(is_small(DVS));\ | ||
2928 | insert_small_chunk(M, DV, DVS);\ | ||
2929 | }\ | ||
2930 | M->dvsize = S;\ | ||
2931 | M->dv = P;\ | ||
2932 | } | ||
2933 | |||
2934 | /* ------------------------- Operations on trees ------------------------- */ | ||
2935 | |||
2936 | /* Insert chunk into tree */ | ||
2937 | #define insert_large_chunk(M, X, S) {\ | ||
2938 | tbinptr* H;\ | ||
2939 | bindex_t I;\ | ||
2940 | compute_tree_index(S, I);\ | ||
2941 | H = treebin_at(M, I);\ | ||
2942 | X->index = I;\ | ||
2943 | X->child[0] = X->child[1] = 0;\ | ||
2944 | if (!treemap_is_marked(M, I)) {\ | ||
2945 | mark_treemap(M, I);\ | ||
2946 | *H = X;\ | ||
2947 | X->parent = (tchunkptr)H;\ | ||
2948 | X->fd = X->bk = X;\ | ||
2949 | }\ | ||
2950 | else {\ | ||
2951 | tchunkptr T = *H;\ | ||
2952 | size_t K = S << leftshift_for_tree_index(I);\ | ||
2953 | for (;;) {\ | ||
2954 | if (chunksize(T) != S) {\ | ||
2955 | tchunkptr* C = &(T->child[(K >> (SIZE_T_BITSIZE-SIZE_T_ONE)) & 1]);\ | ||
2956 | K <<= 1;\ | ||
2957 | if (*C != 0)\ | ||
2958 | T = *C;\ | ||
2959 | else if (RTCHECK(ok_address(M, C))) {\ | ||
2960 | *C = X;\ | ||
2961 | X->parent = T;\ | ||
2962 | X->fd = X->bk = X;\ | ||
2963 | break;\ | ||
2964 | }\ | ||
2965 | else {\ | ||
2966 | CORRUPTION_ERROR_ACTION(M);\ | ||
2967 | break;\ | ||
2968 | }\ | ||
2969 | }\ | ||
2970 | else {\ | ||
2971 | tchunkptr F = T->fd;\ | ||
2972 | if (RTCHECK(ok_address(M, T) && ok_address(M, F))) {\ | ||
2973 | T->fd = F->bk = X;\ | ||
2974 | X->fd = F;\ | ||
2975 | X->bk = T;\ | ||
2976 | X->parent = 0;\ | ||
2977 | break;\ | ||
2978 | }\ | ||
2979 | else {\ | ||
2980 | CORRUPTION_ERROR_ACTION(M);\ | ||
2981 | break;\ | ||
2982 | }\ | ||
2983 | }\ | ||
2984 | }\ | ||
2985 | }\ | ||
2986 | } | ||
2987 | |||
2988 | /* | ||
2989 | Unlink steps: | ||
2990 | |||
2991 | 1. If x is a chained node, unlink it from its same-sized fd/bk links | ||
2992 | and choose its bk node as its replacement. | ||
2993 | 2. If x was the last node of its size, but not a leaf node, it must | ||
2994 | be replaced with a leaf node (not merely one with an open left or | ||
2995 | right), to make sure that lefts and rights of descendents | ||
2996 | correspond properly to bit masks. We use the rightmost descendent | ||
2997 | of x. We could use any other leaf, but this is easy to locate and | ||
2998 | tends to counteract removal of leftmosts elsewhere, and so keeps | ||
2999 | paths shorter than minimally guaranteed. This doesn't loop much | ||
3000 | because on average a node in a tree is near the bottom. | ||
3001 | 3. If x is the base of a chain (i.e., has parent links) relink | ||
3002 | x's parent and children to x's replacement (or null if none). | ||
3003 | */ | ||
3004 | |||
3005 | #define unlink_large_chunk(M, X) {\ | ||
3006 | tchunkptr XP = X->parent;\ | ||
3007 | tchunkptr R;\ | ||
3008 | if (X->bk != X) {\ | ||
3009 | tchunkptr F = X->fd;\ | ||
3010 | R = X->bk;\ | ||
3011 | if (RTCHECK(ok_address(M, F))) {\ | ||
3012 | F->bk = R;\ | ||
3013 | R->fd = F;\ | ||
3014 | }\ | ||
3015 | else {\ | ||
3016 | CORRUPTION_ERROR_ACTION(M);\ | ||
3017 | }\ | ||
3018 | }\ | ||
3019 | else {\ | ||
3020 | tchunkptr* RP;\ | ||
3021 | if (((R = *(RP = &(X->child[1]))) != 0) ||\ | ||
3022 | ((R = *(RP = &(X->child[0]))) != 0)) {\ | ||
3023 | tchunkptr* CP;\ | ||
3024 | while ((*(CP = &(R->child[1])) != 0) ||\ | ||
3025 | (*(CP = &(R->child[0])) != 0)) {\ | ||
3026 | R = *(RP = CP);\ | ||
3027 | }\ | ||
3028 | if (RTCHECK(ok_address(M, RP)))\ | ||
3029 | *RP = 0;\ | ||
3030 | else {\ | ||
3031 | CORRUPTION_ERROR_ACTION(M);\ | ||
3032 | }\ | ||
3033 | }\ | ||
3034 | }\ | ||
3035 | if (XP != 0) {\ | ||
3036 | tbinptr* H = treebin_at(M, X->index);\ | ||
3037 | if (X == *H) {\ | ||
3038 | if ((*H = R) == 0) \ | ||
3039 | clear_treemap(M, X->index);\ | ||
3040 | }\ | ||
3041 | else if (RTCHECK(ok_address(M, XP))) {\ | ||
3042 | if (XP->child[0] == X) \ | ||
3043 | XP->child[0] = R;\ | ||
3044 | else \ | ||
3045 | XP->child[1] = R;\ | ||
3046 | }\ | ||
3047 | else\ | ||
3048 | CORRUPTION_ERROR_ACTION(M);\ | ||
3049 | if (R != 0) {\ | ||
3050 | if (RTCHECK(ok_address(M, R))) {\ | ||
3051 | tchunkptr C0, C1;\ | ||
3052 | R->parent = XP;\ | ||
3053 | if ((C0 = X->child[0]) != 0) {\ | ||
3054 | if (RTCHECK(ok_address(M, C0))) {\ | ||
3055 | R->child[0] = C0;\ | ||
3056 | C0->parent = R;\ | ||
3057 | }\ | ||
3058 | else\ | ||
3059 | CORRUPTION_ERROR_ACTION(M);\ | ||
3060 | }\ | ||
3061 | if ((C1 = X->child[1]) != 0) {\ | ||
3062 | if (RTCHECK(ok_address(M, C1))) {\ | ||
3063 | R->child[1] = C1;\ | ||
3064 | C1->parent = R;\ | ||
3065 | }\ | ||
3066 | else\ | ||
3067 | CORRUPTION_ERROR_ACTION(M);\ | ||
3068 | }\ | ||
3069 | }\ | ||
3070 | else\ | ||
3071 | CORRUPTION_ERROR_ACTION(M);\ | ||
3072 | }\ | ||
3073 | }\ | ||
3074 | } | ||
3075 | |||
3076 | /* Relays to large vs small bin operations */ | ||
3077 | |||
3078 | #define insert_chunk(M, P, S)\ | ||
3079 | if (is_small(S)) insert_small_chunk(M, P, S)\ | ||
3080 | else { tchunkptr TP = (tchunkptr)(P); insert_large_chunk(M, TP, S); } | ||
3081 | |||
3082 | #define unlink_chunk(M, P, S)\ | ||
3083 | if (is_small(S)) unlink_small_chunk(M, P, S)\ | ||
3084 | else { tchunkptr TP = (tchunkptr)(P); unlink_large_chunk(M, TP); } | ||
3085 | |||
3086 | |||
3087 | /* Relays to internal calls to malloc/free from realloc, memalign etc */ | ||
3088 | |||
3089 | #if ONLY_MSPACES | ||
3090 | #define internal_malloc(m, b) mspace_malloc(m, b) | ||
3091 | #define internal_free(m, mem) mspace_free(m,mem); | ||
3092 | #else /* ONLY_MSPACES */ | ||
3093 | #if MSPACES | ||
3094 | #define internal_malloc(m, b)\ | ||
3095 | (m == gm)? dlmalloc(b) : mspace_malloc(m, b) | ||
3096 | #define internal_free(m, mem)\ | ||
3097 | if (m == gm) dlfree(mem); else mspace_free(m,mem); | ||
3098 | #else /* MSPACES */ | ||
3099 | #define internal_malloc(m, b) dlmalloc(b) | ||
3100 | #define internal_free(m, mem) dlfree(mem) | ||
3101 | #endif /* MSPACES */ | ||
3102 | #endif /* ONLY_MSPACES */ | ||
3103 | |||
3104 | /* ----------------------- Direct-mmapping chunks ----------------------- */ | ||
3105 | |||
3106 | /* | ||
3107 | Directly mmapped chunks are set up with an offset to the start of | ||
3108 | the mmapped region stored in the prev_foot field of the chunk. This | ||
3109 | allows reconstruction of the required argument to MUNMAP when freed, | ||
3110 | and also allows adjustment of the returned chunk to meet alignment | ||
3111 | requirements (especially in memalign). There is also enough space | ||
3112 | allocated to hold a fake next chunk of size SIZE_T_SIZE to maintain | ||
3113 | the PINUSE bit so frees can be checked. | ||
3114 | */ | ||
3115 | |||
3116 | /* Malloc using mmap */ | ||
3117 | static void* mmap_alloc(mstate m, size_t nb) { | ||
3118 | size_t mmsize = granularity_align(nb + SIX_SIZE_T_SIZES + CHUNK_ALIGN_MASK); | ||
3119 | if (mmsize > nb) { /* Check for wrap around 0 */ | ||
3120 | char* mm = (char*)(DIRECT_MMAP(mmsize)); | ||
3121 | if (mm != CMFAIL) { | ||
3122 | size_t offset = align_offset(chunk2mem(mm)); | ||
3123 | size_t psize = mmsize - offset - MMAP_FOOT_PAD; | ||
3124 | mchunkptr p = (mchunkptr)(mm + offset); | ||
3125 | p->prev_foot = offset | IS_MMAPPED_BIT; | ||
3126 | (p)->head = (psize|CINUSE_BIT); | ||
3127 | mark_inuse_foot(m, p, psize); | ||
3128 | chunk_plus_offset(p, psize)->head = FENCEPOST_HEAD; | ||
3129 | chunk_plus_offset(p, psize+SIZE_T_SIZE)->head = 0; | ||
3130 | |||
3131 | if (mm < m->least_addr) | ||
3132 | m->least_addr = mm; | ||
3133 | if ((m->footprint += mmsize) > m->max_footprint) | ||
3134 | m->max_footprint = m->footprint; | ||
3135 | assert(is_aligned(chunk2mem(p))); | ||
3136 | check_mmapped_chunk(m, p); | ||
3137 | return chunk2mem(p); | ||
3138 | } | ||
3139 | } | ||
3140 | return 0; | ||
3141 | } | ||
3142 | |||
3143 | /* Realloc using mmap */ | ||
3144 | static mchunkptr mmap_resize(mstate m, mchunkptr oldp, size_t nb) { | ||
3145 | size_t oldsize = chunksize(oldp); | ||
3146 | if (is_small(nb)) /* Can't shrink mmap regions below small size */ | ||
3147 | return 0; | ||
3148 | /* Keep old chunk if big enough but not too big */ | ||
3149 | if (oldsize >= nb + SIZE_T_SIZE && | ||
3150 | (oldsize - nb) <= (mparams.granularity << 1)) | ||
3151 | return oldp; | ||
3152 | else { | ||
3153 | size_t offset = oldp->prev_foot & ~IS_MMAPPED_BIT; | ||
3154 | size_t oldmmsize = oldsize + offset + MMAP_FOOT_PAD; | ||
3155 | size_t newmmsize = granularity_align(nb + SIX_SIZE_T_SIZES + | ||
3156 | CHUNK_ALIGN_MASK); | ||
3157 | char* cp = (char*)CALL_MREMAP((char*)oldp - offset, | ||
3158 | oldmmsize, newmmsize, 1); | ||
3159 | if (cp != CMFAIL) { | ||
3160 | mchunkptr newp = (mchunkptr)(cp + offset); | ||
3161 | size_t psize = newmmsize - offset - MMAP_FOOT_PAD; | ||
3162 | newp->head = (psize|CINUSE_BIT); | ||
3163 | mark_inuse_foot(m, newp, psize); | ||
3164 | chunk_plus_offset(newp, psize)->head = FENCEPOST_HEAD; | ||
3165 | chunk_plus_offset(newp, psize+SIZE_T_SIZE)->head = 0; | ||
3166 | |||
3167 | if (cp < m->least_addr) | ||
3168 | m->least_addr = cp; | ||
3169 | if ((m->footprint += newmmsize - oldmmsize) > m->max_footprint) | ||
3170 | m->max_footprint = m->footprint; | ||
3171 | check_mmapped_chunk(m, newp); | ||
3172 | return newp; | ||
3173 | } | ||
3174 | } | ||
3175 | return 0; | ||
3176 | } | ||
3177 | |||
3178 | /* -------------------------- mspace management -------------------------- */ | ||
3179 | |||
3180 | /* Initialize top chunk and its size */ | ||
3181 | static void init_top(mstate m, mchunkptr p, size_t psize) { | ||
3182 | /* Ensure alignment */ | ||
3183 | size_t offset = align_offset(chunk2mem(p)); | ||
3184 | p = (mchunkptr)((char*)p + offset); | ||
3185 | psize -= offset; | ||
3186 | |||
3187 | m->top = p; | ||
3188 | m->topsize = psize; | ||
3189 | p->head = psize | PINUSE_BIT; | ||
3190 | /* set size of fake trailing chunk holding overhead space only once */ | ||
3191 | chunk_plus_offset(p, psize)->head = TOP_FOOT_SIZE; | ||
3192 | m->trim_check = mparams.trim_threshold; /* reset on each update */ | ||
3193 | } | ||
3194 | |||
3195 | /* Initialize bins for a new mstate that is otherwise zeroed out */ | ||
3196 | static void init_bins(mstate m) { | ||
3197 | /* Establish circular links for smallbins */ | ||
3198 | bindex_t i; | ||
3199 | for (i = 0; i < NSMALLBINS; ++i) { | ||
3200 | sbinptr bin = smallbin_at(m,i); | ||
3201 | bin->fd = bin->bk = bin; | ||
3202 | } | ||
3203 | } | ||
3204 | |||
3205 | #if PROCEED_ON_ERROR | ||
3206 | |||
3207 | /* default corruption action */ | ||
3208 | static void reset_on_error(mstate m) { | ||
3209 | int i; | ||
3210 | ++malloc_corruption_error_count; | ||
3211 | /* Reinitialize fields to forget about all memory */ | ||
3212 | m->smallbins = m->treebins = 0; | ||
3213 | m->dvsize = m->topsize = 0; | ||
3214 | m->seg.base = 0; | ||
3215 | m->seg.size = 0; | ||
3216 | m->seg.next = 0; | ||
3217 | m->top = m->dv = 0; | ||
3218 | for (i = 0; i < NTREEBINS; ++i) | ||
3219 | *treebin_at(m, i) = 0; | ||
3220 | init_bins(m); | ||
3221 | } | ||
3222 | #endif /* PROCEED_ON_ERROR */ | ||
3223 | |||
3224 | /* Allocate chunk and prepend remainder with chunk in successor base. */ | ||
3225 | static void* prepend_alloc(mstate m, char* newbase, char* oldbase, | ||
3226 | size_t nb) { | ||
3227 | mchunkptr p = align_as_chunk(newbase); | ||
3228 | mchunkptr oldfirst = align_as_chunk(oldbase); | ||
3229 | size_t psize = (char*)oldfirst - (char*)p; | ||
3230 | mchunkptr q = chunk_plus_offset(p, nb); | ||
3231 | size_t qsize = psize - nb; | ||
3232 | set_size_and_pinuse_of_inuse_chunk(m, p, nb); | ||
3233 | |||
3234 | assert((char*)oldfirst > (char*)q); | ||
3235 | assert(pinuse(oldfirst)); | ||
3236 | assert(qsize >= MIN_CHUNK_SIZE); | ||
3237 | |||
3238 | /* consolidate remainder with first chunk of old base */ | ||
3239 | if (oldfirst == m->top) { | ||
3240 | size_t tsize = m->topsize += qsize; | ||
3241 | m->top = q; | ||
3242 | q->head = tsize | PINUSE_BIT; | ||
3243 | check_top_chunk(m, q); | ||
3244 | } | ||
3245 | else if (oldfirst == m->dv) { | ||
3246 | size_t dsize = m->dvsize += qsize; | ||
3247 | m->dv = q; | ||
3248 | set_size_and_pinuse_of_free_chunk(q, dsize); | ||
3249 | } | ||
3250 | else { | ||
3251 | if (!cinuse(oldfirst)) { | ||
3252 | size_t nsize = chunksize(oldfirst); | ||
3253 | unlink_chunk(m, oldfirst, nsize); | ||
3254 | oldfirst = chunk_plus_offset(oldfirst, nsize); | ||
3255 | qsize += nsize; | ||
3256 | } | ||
3257 | set_free_with_pinuse(q, qsize, oldfirst); | ||
3258 | insert_chunk(m, q, qsize); | ||
3259 | check_free_chunk(m, q); | ||
3260 | } | ||
3261 | |||
3262 | check_malloced_chunk(m, chunk2mem(p), nb); | ||
3263 | return chunk2mem(p); | ||
3264 | } | ||
3265 | |||
3266 | |||
3267 | /* Add a segment to hold a new noncontiguous region */ | ||
3268 | static void add_segment(mstate m, char* tbase, size_t tsize, flag_t mmapped) { | ||
3269 | /* Determine locations and sizes of segment, fenceposts, old top */ | ||
3270 | char* old_top = (char*)m->top; | ||
3271 | msegmentptr oldsp = segment_holding(m, old_top); | ||
3272 | char* old_end = oldsp->base + oldsp->size; | ||
3273 | size_t ssize = pad_request(sizeof(struct malloc_segment)); | ||
3274 | char* rawsp = old_end - (ssize + FOUR_SIZE_T_SIZES + CHUNK_ALIGN_MASK); | ||
3275 | size_t offset = align_offset(chunk2mem(rawsp)); | ||
3276 | char* asp = rawsp + offset; | ||
3277 | char* csp = (asp < (old_top + MIN_CHUNK_SIZE))? old_top : asp; | ||
3278 | mchunkptr sp = (mchunkptr)csp; | ||
3279 | msegmentptr ss = (msegmentptr)(chunk2mem(sp)); | ||
3280 | mchunkptr tnext = chunk_plus_offset(sp, ssize); | ||
3281 | mchunkptr p = tnext; | ||
3282 | int nfences = 0; | ||
3283 | |||
3284 | /* reset top to new space */ | ||
3285 | init_top(m, (mchunkptr)tbase, tsize - TOP_FOOT_SIZE); | ||
3286 | |||
3287 | /* Set up segment record */ | ||
3288 | assert(is_aligned(ss)); | ||
3289 | set_size_and_pinuse_of_inuse_chunk(m, sp, ssize); | ||
3290 | *ss = m->seg; /* Push current record */ | ||
3291 | m->seg.base = tbase; | ||
3292 | m->seg.size = tsize; | ||
3293 | m->seg.sflags = mmapped; | ||
3294 | m->seg.next = ss; | ||
3295 | |||
3296 | /* Insert trailing fenceposts */ | ||
3297 | for (;;) { | ||
3298 | mchunkptr nextp = chunk_plus_offset(p, SIZE_T_SIZE); | ||
3299 | p->head = FENCEPOST_HEAD; | ||
3300 | ++nfences; | ||
3301 | if ((char*)(&(nextp->head)) < old_end) | ||
3302 | p = nextp; | ||
3303 | else | ||
3304 | break; | ||
3305 | } | ||
3306 | assert(nfences >= 2); | ||
3307 | |||
3308 | /* Insert the rest of old top into a bin as an ordinary free chunk */ | ||
3309 | if (csp != old_top) { | ||
3310 | mchunkptr q = (mchunkptr)old_top; | ||
3311 | size_t psize = csp - old_top; | ||
3312 | mchunkptr tn = chunk_plus_offset(q, psize); | ||
3313 | set_free_with_pinuse(q, psize, tn); | ||
3314 | insert_chunk(m, q, psize); | ||
3315 | } | ||
3316 | |||
3317 | check_top_chunk(m, m->top); | ||
3318 | } | ||
3319 | |||
3320 | /* -------------------------- System allocation -------------------------- */ | ||
3321 | |||
3322 | /* Get memory from system using MORECORE or MMAP */ | ||
3323 | static void* sys_alloc(mstate m, size_t nb) { | ||
3324 | char* tbase = CMFAIL; | ||
3325 | size_t tsize = 0; | ||
3326 | flag_t mmap_flag = 0; | ||
3327 | |||
3328 | init_mparams(); | ||
3329 | |||
3330 | /* Directly map large chunks */ | ||
3331 | if (use_mmap(m) && nb >= mparams.mmap_threshold) { | ||
3332 | void* mem = mmap_alloc(m, nb); | ||
3333 | if (mem != 0) | ||
3334 | return mem; | ||
3335 | } | ||
3336 | |||
3337 | /* | ||
3338 | Try getting memory in any of three ways (in most-preferred to | ||
3339 | least-preferred order): | ||
3340 | 1. A call to MORECORE that can normally contiguously extend memory. | ||
3341 | (disabled if not MORECORE_CONTIGUOUS or not HAVE_MORECORE or | ||
3342 | or main space is mmapped or a previous contiguous call failed) | ||
3343 | 2. A call to MMAP new space (disabled if not HAVE_MMAP). | ||
3344 | Note that under the default settings, if MORECORE is unable to | ||
3345 | fulfill a request, and HAVE_MMAP is true, then mmap is | ||
3346 | used as a noncontiguous system allocator. This is a useful backup | ||
3347 | strategy for systems with holes in address spaces -- in this case | ||
3348 | sbrk cannot contiguously expand the heap, but mmap may be able to | ||
3349 | find space. | ||
3350 | 3. A call to MORECORE that cannot usually contiguously extend memory. | ||
3351 | (disabled if not HAVE_MORECORE) | ||
3352 | */ | ||
3353 | |||
3354 | if (MORECORE_CONTIGUOUS && !use_noncontiguous(m)) { | ||
3355 | char* br = CMFAIL; | ||
3356 | msegmentptr ss = (m->top == 0)? 0 : segment_holding(m, (char*)m->top); | ||
3357 | size_t asize = 0; | ||
3358 | ACQUIRE_MORECORE_LOCK(); | ||
3359 | |||
3360 | if (ss == 0) { /* First time through or recovery */ | ||
3361 | char* base = (char*)CALL_MORECORE(0); | ||
3362 | if (base != CMFAIL) { | ||
3363 | asize = granularity_align(nb + TOP_FOOT_SIZE + SIZE_T_ONE); | ||
3364 | /* Adjust to end on a page boundary */ | ||
3365 | if (!is_page_aligned(base)) | ||
3366 | asize += (page_align((size_t)base) - (size_t)base); | ||
3367 | /* Can't call MORECORE if size is negative when treated as signed */ | ||
3368 | if (asize < HALF_MAX_SIZE_T && | ||
3369 | (br = (char*)(CALL_MORECORE(asize))) == base) { | ||
3370 | tbase = base; | ||
3371 | tsize = asize; | ||
3372 | } | ||
3373 | } | ||
3374 | } | ||
3375 | else { | ||
3376 | /* Subtract out existing available top space from MORECORE request. */ | ||
3377 | asize = granularity_align(nb - m->topsize + TOP_FOOT_SIZE + SIZE_T_ONE); | ||
3378 | /* Use mem here only if it did continuously extend old space */ | ||
3379 | if (asize < HALF_MAX_SIZE_T && | ||
3380 | (br = (char*)(CALL_MORECORE(asize))) == ss->base+ss->size) { | ||
3381 | tbase = br; | ||
3382 | tsize = asize; | ||
3383 | } | ||
3384 | } | ||
3385 | |||
3386 | if (tbase == CMFAIL) { /* Cope with partial failure */ | ||
3387 | if (br != CMFAIL) { /* Try to use/extend the space we did get */ | ||
3388 | if (asize < HALF_MAX_SIZE_T && | ||
3389 | asize < nb + TOP_FOOT_SIZE + SIZE_T_ONE) { | ||
3390 | size_t esize = granularity_align(nb + TOP_FOOT_SIZE + SIZE_T_ONE - asize); | ||
3391 | if (esize < HALF_MAX_SIZE_T) { | ||
3392 | char* end = (char*)CALL_MORECORE(esize); | ||
3393 | if (end != CMFAIL) | ||
3394 | asize += esize; | ||
3395 | else { /* Can't use; try to release */ | ||
3396 | CALL_MORECORE(-asize); | ||
3397 | br = CMFAIL; | ||
3398 | } | ||
3399 | } | ||
3400 | } | ||
3401 | } | ||
3402 | if (br != CMFAIL) { /* Use the space we did get */ | ||
3403 | tbase = br; | ||
3404 | tsize = asize; | ||
3405 | } | ||
3406 | else | ||
3407 | disable_contiguous(m); /* Don't try contiguous path in the future */ | ||
3408 | } | ||
3409 | |||
3410 | RELEASE_MORECORE_LOCK(); | ||
3411 | } | ||
3412 | |||
3413 | if (HAVE_MMAP && tbase == CMFAIL) { /* Try MMAP */ | ||
3414 | size_t req = nb + TOP_FOOT_SIZE + SIZE_T_ONE; | ||
3415 | size_t rsize = granularity_align(req); | ||
3416 | if (rsize > nb) { /* Fail if wraps around zero */ | ||
3417 | char* mp = (char*)(CALL_MMAP(rsize)); | ||
3418 | if (mp != CMFAIL) { | ||
3419 | tbase = mp; | ||
3420 | tsize = rsize; | ||
3421 | mmap_flag = IS_MMAPPED_BIT; | ||
3422 | } | ||
3423 | } | ||
3424 | } | ||
3425 | |||
3426 | if (HAVE_MORECORE && tbase == CMFAIL) { /* Try noncontiguous MORECORE */ | ||
3427 | size_t asize = granularity_align(nb + TOP_FOOT_SIZE + SIZE_T_ONE); | ||
3428 | if (asize < HALF_MAX_SIZE_T) { | ||
3429 | char* br = CMFAIL; | ||
3430 | char* end = CMFAIL; | ||
3431 | ACQUIRE_MORECORE_LOCK(); | ||
3432 | br = (char*)(CALL_MORECORE(asize)); | ||
3433 | end = (char*)(CALL_MORECORE(0)); | ||
3434 | RELEASE_MORECORE_LOCK(); | ||
3435 | if (br != CMFAIL && end != CMFAIL && br < end) { | ||
3436 | size_t ssize = end - br; | ||
3437 | if (ssize > nb + TOP_FOOT_SIZE) { | ||
3438 | tbase = br; | ||
3439 | tsize = ssize; | ||
3440 | } | ||
3441 | } | ||
3442 | } | ||
3443 | } | ||
3444 | |||
3445 | if (tbase != CMFAIL) { | ||
3446 | |||
3447 | if ((m->footprint += tsize) > m->max_footprint) | ||
3448 | m->max_footprint = m->footprint; | ||
3449 | |||
3450 | if (!is_initialized(m)) { /* first-time initialization */ | ||
3451 | m->seg.base = m->least_addr = tbase; | ||
3452 | m->seg.size = tsize; | ||
3453 | m->seg.sflags = mmap_flag; | ||
3454 | m->magic = mparams.magic; | ||
3455 | init_bins(m); | ||
3456 | if (is_global(m)) | ||
3457 | init_top(m, (mchunkptr)tbase, tsize - TOP_FOOT_SIZE); | ||
3458 | else { | ||
3459 | /* Offset top by embedded malloc_state */ | ||
3460 | mchunkptr mn = next_chunk(mem2chunk(m)); | ||
3461 | init_top(m, mn, (size_t)((tbase + tsize) - (char*)mn) -TOP_FOOT_SIZE); | ||
3462 | } | ||
3463 | } | ||
3464 | |||
3465 | else { | ||
3466 | /* Try to merge with an existing segment */ | ||
3467 | msegmentptr sp = &m->seg; | ||
3468 | while (sp != 0 && tbase != sp->base + sp->size) | ||
3469 | sp = sp->next; | ||
3470 | if (sp != 0 && | ||
3471 | !is_extern_segment(sp) && | ||
3472 | (sp->sflags & IS_MMAPPED_BIT) == mmap_flag && | ||
3473 | segment_holds(sp, m->top)) { /* append */ | ||
3474 | sp->size += tsize; | ||
3475 | init_top(m, m->top, m->topsize + tsize); | ||
3476 | } | ||
3477 | else { | ||
3478 | if (tbase < m->least_addr) | ||
3479 | m->least_addr = tbase; | ||
3480 | sp = &m->seg; | ||
3481 | while (sp != 0 && sp->base != tbase + tsize) | ||
3482 | sp = sp->next; | ||
3483 | if (sp != 0 && | ||
3484 | !is_extern_segment(sp) && | ||
3485 | (sp->sflags & IS_MMAPPED_BIT) == mmap_flag) { | ||
3486 | char* oldbase = sp->base; | ||
3487 | sp->base = tbase; | ||
3488 | sp->size += tsize; | ||
3489 | return prepend_alloc(m, tbase, oldbase, nb); | ||
3490 | } | ||
3491 | else | ||
3492 | add_segment(m, tbase, tsize, mmap_flag); | ||
3493 | } | ||
3494 | } | ||
3495 | |||
3496 | if (nb < m->topsize) { /* Allocate from new or extended top space */ | ||
3497 | size_t rsize = m->topsize -= nb; | ||
3498 | mchunkptr p = m->top; | ||
3499 | mchunkptr r = m->top = chunk_plus_offset(p, nb); | ||
3500 | r->head = rsize | PINUSE_BIT; | ||
3501 | set_size_and_pinuse_of_inuse_chunk(m, p, nb); | ||
3502 | check_top_chunk(m, m->top); | ||
3503 | check_malloced_chunk(m, chunk2mem(p), nb); | ||
3504 | return chunk2mem(p); | ||
3505 | } | ||
3506 | } | ||
3507 | |||
3508 | MALLOC_FAILURE_ACTION; | ||
3509 | return 0; | ||
3510 | } | ||
3511 | |||
3512 | /* ----------------------- system deallocation -------------------------- */ | ||
3513 | |||
3514 | /* Unmap and unlink any mmapped segments that don't contain used chunks */ | ||
3515 | static size_t release_unused_segments(mstate m) { | ||
3516 | size_t released = 0; | ||
3517 | msegmentptr pred = &m->seg; | ||
3518 | msegmentptr sp = pred->next; | ||
3519 | while (sp != 0) { | ||
3520 | char* base = sp->base; | ||
3521 | size_t size = sp->size; | ||
3522 | msegmentptr next = sp->next; | ||
3523 | if (is_mmapped_segment(sp) && !is_extern_segment(sp)) { | ||
3524 | mchunkptr p = align_as_chunk(base); | ||
3525 | size_t psize = chunksize(p); | ||
3526 | /* Can unmap if first chunk holds entire segment and not pinned */ | ||
3527 | if (!cinuse(p) && (char*)p + psize >= base + size - TOP_FOOT_SIZE) { | ||
3528 | tchunkptr tp = (tchunkptr)p; | ||
3529 | assert(segment_holds(sp, (char*)sp)); | ||
3530 | if (p == m->dv) { | ||
3531 | m->dv = 0; | ||
3532 | m->dvsize = 0; | ||
3533 | } | ||
3534 | else { | ||
3535 | unlink_large_chunk(m, tp); | ||
3536 | } | ||
3537 | if (CALL_MUNMAP(base, size) == 0) { | ||
3538 | released += size; | ||
3539 | m->footprint -= size; | ||
3540 | /* unlink obsoleted record */ | ||
3541 | sp = pred; | ||
3542 | sp->next = next; | ||
3543 | } | ||
3544 | else { /* back out if cannot unmap */ | ||
3545 | insert_large_chunk(m, tp, psize); | ||
3546 | } | ||
3547 | } | ||
3548 | } | ||
3549 | pred = sp; | ||
3550 | sp = next; | ||
3551 | } | ||
3552 | return released; | ||
3553 | } | ||
3554 | |||
3555 | static int sys_trim(mstate m, size_t pad) { | ||
3556 | size_t released = 0; | ||
3557 | if (pad < MAX_REQUEST && is_initialized(m)) { | ||
3558 | pad += TOP_FOOT_SIZE; /* ensure enough room for segment overhead */ | ||
3559 | |||
3560 | if (m->topsize > pad) { | ||
3561 | /* Shrink top space in granularity-size units, keeping at least one */ | ||
3562 | size_t unit = mparams.granularity; | ||
3563 | size_t extra = ((m->topsize - pad + (unit - SIZE_T_ONE)) / unit - | ||
3564 | SIZE_T_ONE) * unit; | ||
3565 | msegmentptr sp = segment_holding(m, (char*)m->top); | ||
3566 | |||
3567 | if (!is_extern_segment(sp)) { | ||
3568 | if (is_mmapped_segment(sp)) { | ||
3569 | if (HAVE_MMAP && | ||
3570 | sp->size >= extra && | ||
3571 | !has_segment_link(m, sp)) { /* can't shrink if pinned */ | ||
3572 | // size_t newsize = sp->size - extra; | ||
3573 | /* Prefer mremap, fall back to munmap */ | ||
3574 | if ((CALL_MREMAP(sp->base, sp->size, newsize, 0) != MFAIL) || | ||
3575 | (CALL_MUNMAP(sp->base + newsize, extra) == 0)) { | ||
3576 | released = extra; | ||
3577 | } | ||
3578 | } | ||
3579 | } | ||
3580 | else if (HAVE_MORECORE) { | ||
3581 | if (extra >= HALF_MAX_SIZE_T) /* Avoid wrapping negative */ | ||
3582 | extra = (HALF_MAX_SIZE_T) + SIZE_T_ONE - unit; | ||
3583 | ACQUIRE_MORECORE_LOCK(); | ||
3584 | { | ||
3585 | /* Make sure end of memory is where we last set it. */ | ||
3586 | char* old_br = (char*)(CALL_MORECORE(0)); | ||
3587 | if (old_br == sp->base + sp->size) { | ||
3588 | char* rel_br = (char*)(CALL_MORECORE(-extra)); | ||
3589 | char* new_br = (char*)(CALL_MORECORE(0)); | ||
3590 | if (rel_br != CMFAIL && new_br < old_br) | ||
3591 | released = old_br - new_br; | ||
3592 | } | ||
3593 | } | ||
3594 | RELEASE_MORECORE_LOCK(); | ||
3595 | } | ||
3596 | } | ||
3597 | |||
3598 | if (released != 0) { | ||
3599 | sp->size -= released; | ||
3600 | m->footprint -= released; | ||
3601 | init_top(m, m->top, m->topsize - released); | ||
3602 | check_top_chunk(m, m->top); | ||
3603 | } | ||
3604 | } | ||
3605 | |||
3606 | /* Unmap any unused mmapped segments */ | ||
3607 | if (HAVE_MMAP) | ||
3608 | released += release_unused_segments(m); | ||
3609 | |||
3610 | /* On failure, disable autotrim to avoid repeated failed future calls */ | ||
3611 | if (released == 0) | ||
3612 | m->trim_check = MAX_SIZE_T; | ||
3613 | } | ||
3614 | |||
3615 | return (released != 0)? 1 : 0; | ||
3616 | } | ||
3617 | |||
3618 | /* ---------------------------- malloc support --------------------------- */ | ||
3619 | |||
3620 | /* allocate a large request from the best fitting chunk in a treebin */ | ||
3621 | static void* tmalloc_large(mstate m, size_t nb) { | ||
3622 | tchunkptr v = 0; | ||
3623 | size_t rsize = -nb; /* Unsigned negation */ | ||
3624 | tchunkptr t; | ||
3625 | bindex_t idx; | ||
3626 | compute_tree_index(nb, idx); | ||
3627 | |||
3628 | if ((t = *treebin_at(m, idx)) != 0) { | ||
3629 | /* Traverse tree for this bin looking for node with size == nb */ | ||
3630 | size_t sizebits = nb << leftshift_for_tree_index(idx); | ||
3631 | tchunkptr rst = 0; /* The deepest untaken right subtree */ | ||
3632 | for (;;) { | ||
3633 | tchunkptr rt; | ||
3634 | size_t trem = chunksize(t) - nb; | ||
3635 | if (trem < rsize) { | ||
3636 | v = t; | ||
3637 | if ((rsize = trem) == 0) | ||
3638 | break; | ||
3639 | } | ||
3640 | rt = t->child[1]; | ||
3641 | t = t->child[(sizebits >> (SIZE_T_BITSIZE-SIZE_T_ONE)) & 1]; | ||
3642 | if (rt != 0 && rt != t) | ||
3643 | rst = rt; | ||
3644 | if (t == 0) { | ||
3645 | t = rst; /* set t to least subtree holding sizes > nb */ | ||
3646 | break; | ||
3647 | } | ||
3648 | sizebits <<= 1; | ||
3649 | } | ||
3650 | } | ||
3651 | |||
3652 | if (t == 0 && v == 0) { /* set t to root of next non-empty treebin */ | ||
3653 | binmap_t leftbits = left_bits(idx2bit(idx)) & m->treemap; | ||
3654 | if (leftbits != 0) { | ||
3655 | bindex_t i; | ||
3656 | binmap_t leastbit = least_bit(leftbits); | ||
3657 | compute_bit2idx(leastbit, i); | ||
3658 | t = *treebin_at(m, i); | ||
3659 | } | ||
3660 | } | ||
3661 | |||
3662 | while (t != 0) { /* find smallest of tree or subtree */ | ||
3663 | size_t trem = chunksize(t) - nb; | ||
3664 | if (trem < rsize) { | ||
3665 | rsize = trem; | ||
3666 | v = t; | ||
3667 | } | ||
3668 | t = leftmost_child(t); | ||
3669 | } | ||
3670 | |||
3671 | /* If dv is a better fit, return 0 so malloc will use it */ | ||
3672 | if (v != 0 && rsize < (size_t)(m->dvsize - nb)) { | ||
3673 | if (RTCHECK(ok_address(m, v))) { /* split */ | ||
3674 | mchunkptr r = chunk_plus_offset(v, nb); | ||
3675 | assert(chunksize(v) == rsize + nb); | ||
3676 | if (RTCHECK(ok_next(v, r))) { | ||
3677 | unlink_large_chunk(m, v); | ||
3678 | if (rsize < MIN_CHUNK_SIZE) | ||
3679 | set_inuse_and_pinuse(m, v, (rsize + nb)); | ||
3680 | else { | ||
3681 | set_size_and_pinuse_of_inuse_chunk(m, v, nb); | ||
3682 | set_size_and_pinuse_of_free_chunk(r, rsize); | ||
3683 | insert_chunk(m, r, rsize); | ||
3684 | } | ||
3685 | return chunk2mem(v); | ||
3686 | } | ||
3687 | } | ||
3688 | CORRUPTION_ERROR_ACTION(m); | ||
3689 | } | ||
3690 | return 0; | ||
3691 | } | ||
3692 | |||
3693 | /* allocate a small request from the best fitting chunk in a treebin */ | ||
3694 | static void* tmalloc_small(mstate m, size_t nb) { | ||
3695 | tchunkptr t, v; | ||
3696 | size_t rsize; | ||
3697 | bindex_t i; | ||
3698 | binmap_t leastbit = least_bit(m->treemap); | ||
3699 | compute_bit2idx(leastbit, i); | ||
3700 | |||
3701 | v = t = *treebin_at(m, i); | ||
3702 | rsize = chunksize(t) - nb; | ||
3703 | |||
3704 | while ((t = leftmost_child(t)) != 0) { | ||
3705 | size_t trem = chunksize(t) - nb; | ||
3706 | if (trem < rsize) { | ||
3707 | rsize = trem; | ||
3708 | v = t; | ||
3709 | } | ||
3710 | } | ||
3711 | |||
3712 | if (RTCHECK(ok_address(m, v))) { | ||
3713 | mchunkptr r = chunk_plus_offset(v, nb); | ||
3714 | assert(chunksize(v) == rsize + nb); | ||
3715 | if (RTCHECK(ok_next(v, r))) { | ||
3716 | unlink_large_chunk(m, v); | ||
3717 | if (rsize < MIN_CHUNK_SIZE) | ||
3718 | set_inuse_and_pinuse(m, v, (rsize + nb)); | ||
3719 | else { | ||
3720 | set_size_and_pinuse_of_inuse_chunk(m, v, nb); | ||
3721 | set_size_and_pinuse_of_free_chunk(r, rsize); | ||
3722 | replace_dv(m, r, rsize); | ||
3723 | } | ||
3724 | return chunk2mem(v); | ||
3725 | } | ||
3726 | } | ||
3727 | |||
3728 | CORRUPTION_ERROR_ACTION(m); | ||
3729 | return 0; | ||
3730 | } | ||
3731 | |||
3732 | /* --------------------------- realloc support --------------------------- */ | ||
3733 | |||
3734 | static void* internal_realloc(mstate m, void* oldmem, size_t bytes) { | ||
3735 | if (bytes >= MAX_REQUEST) { | ||
3736 | MALLOC_FAILURE_ACTION; | ||
3737 | return 0; | ||
3738 | } | ||
3739 | if (!PREACTION(m)) { | ||
3740 | mchunkptr oldp = mem2chunk(oldmem); | ||
3741 | size_t oldsize = chunksize(oldp); | ||
3742 | mchunkptr next = chunk_plus_offset(oldp, oldsize); | ||
3743 | mchunkptr newp = 0; | ||
3744 | void* extra = 0; | ||
3745 | |||
3746 | /* Try to either shrink or extend into top. Else malloc-copy-free */ | ||
3747 | |||
3748 | if (RTCHECK(ok_address(m, oldp) && ok_cinuse(oldp) && | ||
3749 | ok_next(oldp, next) && ok_pinuse(next))) { | ||
3750 | size_t nb = request2size(bytes); | ||
3751 | if (is_mmapped(oldp)) | ||
3752 | newp = mmap_resize(m, oldp, nb); | ||
3753 | else if (oldsize >= nb) { /* already big enough */ | ||
3754 | size_t rsize = oldsize - nb; | ||
3755 | newp = oldp; | ||
3756 | if (rsize >= MIN_CHUNK_SIZE) { | ||
3757 | mchunkptr remainder = chunk_plus_offset(newp, nb); | ||
3758 | set_inuse(m, newp, nb); | ||
3759 | set_inuse(m, remainder, rsize); | ||
3760 | extra = chunk2mem(remainder); | ||
3761 | } | ||
3762 | } | ||
3763 | else if (next == m->top && oldsize + m->topsize > nb) { | ||
3764 | /* Expand into top */ | ||
3765 | size_t newsize = oldsize + m->topsize; | ||
3766 | size_t newtopsize = newsize - nb; | ||
3767 | mchunkptr newtop = chunk_plus_offset(oldp, nb); | ||
3768 | set_inuse(m, oldp, nb); | ||
3769 | newtop->head = newtopsize |PINUSE_BIT; | ||
3770 | m->top = newtop; | ||
3771 | m->topsize = newtopsize; | ||
3772 | newp = oldp; | ||
3773 | } | ||
3774 | } | ||
3775 | else { | ||
3776 | USAGE_ERROR_ACTION(m, oldmem); | ||
3777 | POSTACTION(m); | ||
3778 | return 0; | ||
3779 | } | ||
3780 | |||
3781 | POSTACTION(m); | ||
3782 | |||
3783 | if (newp != 0) { | ||
3784 | if (extra != 0) { | ||
3785 | internal_free(m, extra); | ||
3786 | } | ||
3787 | check_inuse_chunk(m, newp); | ||
3788 | return chunk2mem(newp); | ||
3789 | } | ||
3790 | else { | ||
3791 | void* newmem = internal_malloc(m, bytes); | ||
3792 | if (newmem != 0) { | ||
3793 | size_t oc = oldsize - overhead_for(oldp); | ||
3794 | memcpy(newmem, oldmem, (oc < bytes)? oc : bytes); | ||
3795 | internal_free(m, oldmem); | ||
3796 | } | ||
3797 | return newmem; | ||
3798 | } | ||
3799 | } | ||
3800 | return 0; | ||
3801 | } | ||
3802 | |||
3803 | /* --------------------------- memalign support -------------------------- */ | ||
3804 | |||
3805 | static void* internal_memalign(mstate m, size_t alignment, size_t bytes) { | ||
3806 | if (alignment <= MALLOC_ALIGNMENT) /* Can just use malloc */ | ||
3807 | return internal_malloc(m, bytes); | ||
3808 | if (alignment < MIN_CHUNK_SIZE) /* must be at least a minimum chunk size */ | ||
3809 | alignment = MIN_CHUNK_SIZE; | ||
3810 | if ((alignment & (alignment-SIZE_T_ONE)) != 0) {/* Ensure a power of 2 */ | ||
3811 | size_t a = MALLOC_ALIGNMENT << 1; | ||
3812 | while (a < alignment) a <<= 1; | ||
3813 | alignment = a; | ||
3814 | } | ||
3815 | |||
3816 | if (bytes >= MAX_REQUEST - alignment) { | ||
3817 | if (m != 0) { /* Test isn't needed but avoids compiler warning */ | ||
3818 | MALLOC_FAILURE_ACTION; | ||
3819 | } | ||
3820 | } | ||
3821 | else { | ||
3822 | size_t nb = request2size(bytes); | ||
3823 | size_t req = nb + alignment + MIN_CHUNK_SIZE - CHUNK_OVERHEAD; | ||
3824 | char* mem = (char*)internal_malloc(m, req); | ||
3825 | if (mem != 0) { | ||
3826 | void* leader = 0; | ||
3827 | void* trailer = 0; | ||
3828 | mchunkptr p = mem2chunk(mem); | ||
3829 | |||
3830 | if (PREACTION(m)) return 0; | ||
3831 | if ((((size_t)(mem)) % alignment) != 0) { /* misaligned */ | ||
3832 | /* | ||
3833 | Find an aligned spot inside chunk. Since we need to give | ||
3834 | back leading space in a chunk of at least MIN_CHUNK_SIZE, if | ||
3835 | the first calculation places us at a spot with less than | ||
3836 | MIN_CHUNK_SIZE leader, we can move to the next aligned spot. | ||
3837 | We've allocated enough total room so that this is always | ||
3838 | possible. | ||
3839 | */ | ||
3840 | char* br = (char*)mem2chunk((size_t)(((size_t)(mem + | ||
3841 | alignment - | ||
3842 | SIZE_T_ONE)) & | ||
3843 | -alignment)); | ||
3844 | char* pos = ((size_t)(br - (char*)(p)) >= MIN_CHUNK_SIZE)? | ||
3845 | br : br+alignment; | ||
3846 | mchunkptr newp = (mchunkptr)pos; | ||
3847 | size_t leadsize = pos - (char*)(p); | ||
3848 | size_t newsize = chunksize(p) - leadsize; | ||
3849 | |||
3850 | if (is_mmapped(p)) { /* For mmapped chunks, just adjust offset */ | ||
3851 | newp->prev_foot = p->prev_foot + leadsize; | ||
3852 | newp->head = (newsize|CINUSE_BIT); | ||
3853 | } | ||
3854 | else { /* Otherwise, give back leader, use the rest */ | ||
3855 | set_inuse(m, newp, newsize); | ||
3856 | set_inuse(m, p, leadsize); | ||
3857 | leader = chunk2mem(p); | ||
3858 | } | ||
3859 | p = newp; | ||
3860 | } | ||
3861 | |||
3862 | /* Give back spare room at the end */ | ||
3863 | if (!is_mmapped(p)) { | ||
3864 | size_t size = chunksize(p); | ||
3865 | if (size > nb + MIN_CHUNK_SIZE) { | ||
3866 | size_t remainder_size = size - nb; | ||
3867 | mchunkptr remainder = chunk_plus_offset(p, nb); | ||
3868 | set_inuse(m, p, nb); | ||
3869 | set_inuse(m, remainder, remainder_size); | ||
3870 | trailer = chunk2mem(remainder); | ||
3871 | } | ||
3872 | } | ||
3873 | |||
3874 | assert (chunksize(p) >= nb); | ||
3875 | assert((((size_t)(chunk2mem(p))) % alignment) == 0); | ||
3876 | check_inuse_chunk(m, p); | ||
3877 | POSTACTION(m); | ||
3878 | if (leader != 0) { | ||
3879 | internal_free(m, leader); | ||
3880 | } | ||
3881 | if (trailer != 0) { | ||
3882 | internal_free(m, trailer); | ||
3883 | } | ||
3884 | return chunk2mem(p); | ||
3885 | } | ||
3886 | } | ||
3887 | return 0; | ||
3888 | } | ||
3889 | |||
3890 | /* ------------------------ comalloc/coalloc support --------------------- */ | ||
3891 | |||
3892 | static void** ialloc(mstate m, | ||
3893 | size_t n_elements, | ||
3894 | size_t* sizes, | ||
3895 | int opts, | ||
3896 | void* chunks[]) { | ||
3897 | /* | ||
3898 | This provides common support for independent_X routines, handling | ||
3899 | all of the combinations that can result. | ||
3900 | |||
3901 | The opts arg has: | ||
3902 | bit 0 set if all elements are same size (using sizes[0]) | ||
3903 | bit 1 set if elements should be zeroed | ||
3904 | */ | ||
3905 | |||
3906 | size_t element_size; /* chunksize of each element, if all same */ | ||
3907 | size_t contents_size; /* total size of elements */ | ||
3908 | size_t array_size; /* request size of pointer array */ | ||
3909 | void* mem; /* malloced aggregate space */ | ||
3910 | mchunkptr p; /* corresponding chunk */ | ||
3911 | size_t remainder_size; /* remaining bytes while splitting */ | ||
3912 | void** marray; /* either "chunks" or malloced ptr array */ | ||
3913 | mchunkptr array_chunk; /* chunk for malloced ptr array */ | ||
3914 | flag_t was_enabled; /* to disable mmap */ | ||
3915 | size_t size; | ||
3916 | size_t i; | ||
3917 | |||
3918 | /* compute array length, if needed */ | ||
3919 | if (chunks != 0) { | ||
3920 | if (n_elements == 0) | ||
3921 | return chunks; /* nothing to do */ | ||
3922 | marray = chunks; | ||
3923 | array_size = 0; | ||
3924 | } | ||
3925 | else { | ||
3926 | /* if empty req, must still return chunk representing empty array */ | ||
3927 | if (n_elements == 0) | ||
3928 | return (void**)internal_malloc(m, 0); | ||
3929 | marray = 0; | ||
3930 | array_size = request2size(n_elements * (sizeof(void*))); | ||
3931 | } | ||
3932 | |||
3933 | /* compute total element size */ | ||
3934 | if (opts & 0x1) { /* all-same-size */ | ||
3935 | element_size = request2size(*sizes); | ||
3936 | contents_size = n_elements * element_size; | ||
3937 | } | ||
3938 | else { /* add up all the sizes */ | ||
3939 | element_size = 0; | ||
3940 | contents_size = 0; | ||
3941 | for (i = 0; i != n_elements; ++i) | ||
3942 | contents_size += request2size(sizes[i]); | ||
3943 | } | ||
3944 | |||
3945 | size = contents_size + array_size; | ||
3946 | |||
3947 | /* | ||
3948 | Allocate the aggregate chunk. First disable direct-mmapping so | ||
3949 | malloc won't use it, since we would not be able to later | ||
3950 | free/realloc space internal to a segregated mmap region. | ||
3951 | */ | ||
3952 | was_enabled = use_mmap(m); | ||
3953 | disable_mmap(m); | ||
3954 | mem = internal_malloc(m, size - CHUNK_OVERHEAD); | ||
3955 | if (was_enabled) | ||
3956 | enable_mmap(m); | ||
3957 | if (mem == 0) | ||
3958 | return 0; | ||
3959 | |||
3960 | if (PREACTION(m)) return 0; | ||
3961 | p = mem2chunk(mem); | ||
3962 | remainder_size = chunksize(p); | ||
3963 | |||
3964 | assert(!is_mmapped(p)); | ||
3965 | |||
3966 | if (opts & 0x2) { /* optionally clear the elements */ | ||
3967 | memset((size_t*)mem, 0, remainder_size - SIZE_T_SIZE - array_size); | ||
3968 | } | ||
3969 | |||
3970 | /* If not provided, allocate the pointer array as final part of chunk */ | ||
3971 | if (marray == 0) { | ||
3972 | size_t array_chunk_size; | ||
3973 | array_chunk = chunk_plus_offset(p, contents_size); | ||
3974 | array_chunk_size = remainder_size - contents_size; | ||
3975 | marray = (void**) (chunk2mem(array_chunk)); | ||
3976 | set_size_and_pinuse_of_inuse_chunk(m, array_chunk, array_chunk_size); | ||
3977 | remainder_size = contents_size; | ||
3978 | } | ||
3979 | |||
3980 | /* split out elements */ | ||
3981 | for (i = 0; ; ++i) { | ||
3982 | marray[i] = chunk2mem(p); | ||
3983 | if (i != n_elements-1) { | ||
3984 | if (element_size != 0) | ||
3985 | size = element_size; | ||
3986 | else | ||
3987 | size = request2size(sizes[i]); | ||
3988 | remainder_size -= size; | ||
3989 | set_size_and_pinuse_of_inuse_chunk(m, p, size); | ||
3990 | p = chunk_plus_offset(p, size); | ||
3991 | } | ||
3992 | else { /* the final element absorbs any overallocation slop */ | ||
3993 | set_size_and_pinuse_of_inuse_chunk(m, p, remainder_size); | ||
3994 | break; | ||
3995 | } | ||
3996 | } | ||
3997 | |||
3998 | #if DEBUG | ||
3999 | if (marray != chunks) { | ||
4000 | /* final element must have exactly exhausted chunk */ | ||
4001 | if (element_size != 0) { | ||
4002 | assert(remainder_size == element_size); | ||
4003 | } | ||
4004 | else { | ||
4005 | assert(remainder_size == request2size(sizes[i])); | ||
4006 | } | ||
4007 | check_inuse_chunk(m, mem2chunk(marray)); | ||
4008 | } | ||
4009 | for (i = 0; i != n_elements; ++i) | ||
4010 | check_inuse_chunk(m, mem2chunk(marray[i])); | ||
4011 | |||
4012 | #endif /* DEBUG */ | ||
4013 | |||
4014 | POSTACTION(m); | ||
4015 | return marray; | ||
4016 | } | ||
4017 | |||
4018 | |||
4019 | /* -------------------------- public routines ---------------------------- */ | ||
4020 | |||
4021 | #if !ONLY_MSPACES | ||
4022 | |||
4023 | void* dlmalloc(size_t bytes) { | ||
4024 | /* | ||
4025 | Basic algorithm: | ||
4026 | If a small request (< 256 bytes minus per-chunk overhead): | ||
4027 | 1. If one exists, use a remainderless chunk in associated smallbin. | ||
4028 | (Remainderless means that there are too few excess bytes to | ||
4029 | represent as a chunk.) | ||
4030 | 2. If it is big enough, use the dv chunk, which is normally the | ||
4031 | chunk adjacent to the one used for the most recent small request. | ||
4032 | 3. If one exists, split the smallest available chunk in a bin, | ||
4033 | saving remainder in dv. | ||
4034 | 4. If it is big enough, use the top chunk. | ||
4035 | 5. If available, get memory from system and use it | ||
4036 | Otherwise, for a large request: | ||
4037 | 1. Find the smallest available binned chunk that fits, and use it | ||
4038 | if it is better fitting than dv chunk, splitting if necessary. | ||
4039 | 2. If better fitting than any binned chunk, use the dv chunk. | ||
4040 | 3. If it is big enough, use the top chunk. | ||
4041 | 4. If request size >= mmap threshold, try to directly mmap this chunk. | ||
4042 | 5. If available, get memory from system and use it | ||
4043 | |||
4044 | The ugly goto's here ensure that postaction occurs along all paths. | ||
4045 | */ | ||
4046 | |||
4047 | if (!PREACTION(gm)) { | ||
4048 | void* mem; | ||
4049 | size_t nb; | ||
4050 | if (bytes <= MAX_SMALL_REQUEST) { | ||
4051 | bindex_t idx; | ||
4052 | binmap_t smallbits; | ||
4053 | nb = (bytes < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(bytes); | ||
4054 | idx = small_index(nb); | ||
4055 | smallbits = gm->smallmap >> idx; | ||
4056 | |||
4057 | if ((smallbits & 0x3U) != 0) { /* Remainderless fit to a smallbin. */ | ||
4058 | mchunkptr b, p; | ||
4059 | idx += ~smallbits & 1; /* Uses next bin if idx empty */ | ||
4060 | b = smallbin_at(gm, idx); | ||
4061 | p = b->fd; | ||
4062 | assert(chunksize(p) == small_index2size(idx)); | ||
4063 | unlink_first_small_chunk(gm, b, p, idx); | ||
4064 | set_inuse_and_pinuse(gm, p, small_index2size(idx)); | ||
4065 | mem = chunk2mem(p); | ||
4066 | check_malloced_chunk(gm, mem, nb); | ||
4067 | goto postaction; | ||
4068 | } | ||
4069 | |||
4070 | else if (nb > gm->dvsize) { | ||
4071 | if (smallbits != 0) { /* Use chunk in next nonempty smallbin */ | ||
4072 | mchunkptr b, p, r; | ||
4073 | size_t rsize; | ||
4074 | bindex_t i; | ||
4075 | binmap_t leftbits = (smallbits << idx) & left_bits(idx2bit(idx)); | ||
4076 | binmap_t leastbit = least_bit(leftbits); | ||
4077 | compute_bit2idx(leastbit, i); | ||
4078 | b = smallbin_at(gm, i); | ||
4079 | p = b->fd; | ||
4080 | assert(chunksize(p) == small_index2size(i)); | ||
4081 | unlink_first_small_chunk(gm, b, p, i); | ||
4082 | rsize = small_index2size(i) - nb; | ||
4083 | /* Fit here cannot be remainderless if 4byte sizes */ | ||
4084 | if (SIZE_T_SIZE != 4 && rsize < MIN_CHUNK_SIZE) | ||
4085 | set_inuse_and_pinuse(gm, p, small_index2size(i)); | ||
4086 | else { | ||
4087 | set_size_and_pinuse_of_inuse_chunk(gm, p, nb); | ||
4088 | r = chunk_plus_offset(p, nb); | ||
4089 | set_size_and_pinuse_of_free_chunk(r, rsize); | ||
4090 | replace_dv(gm, r, rsize); | ||
4091 | } | ||
4092 | mem = chunk2mem(p); | ||
4093 | check_malloced_chunk(gm, mem, nb); | ||
4094 | goto postaction; | ||
4095 | } | ||
4096 | |||
4097 | else if (gm->treemap != 0 && (mem = tmalloc_small(gm, nb)) != 0) { | ||
4098 | check_malloced_chunk(gm, mem, nb); | ||
4099 | goto postaction; | ||
4100 | } | ||
4101 | } | ||
4102 | } | ||
4103 | else if (bytes >= MAX_REQUEST) | ||
4104 | nb = MAX_SIZE_T; /* Too big to allocate. Force failure (in sys alloc) */ | ||
4105 | else { | ||
4106 | nb = pad_request(bytes); | ||
4107 | if (gm->treemap != 0 && (mem = tmalloc_large(gm, nb)) != 0) { | ||
4108 | check_malloced_chunk(gm, mem, nb); | ||
4109 | goto postaction; | ||
4110 | } | ||
4111 | } | ||
4112 | |||
4113 | if (nb <= gm->dvsize) { | ||
4114 | size_t rsize = gm->dvsize - nb; | ||
4115 | mchunkptr p = gm->dv; | ||
4116 | if (rsize >= MIN_CHUNK_SIZE) { /* split dv */ | ||
4117 | mchunkptr r = gm->dv = chunk_plus_offset(p, nb); | ||
4118 | gm->dvsize = rsize; | ||
4119 | set_size_and_pinuse_of_free_chunk(r, rsize); | ||
4120 | set_size_and_pinuse_of_inuse_chunk(gm, p, nb); | ||
4121 | } | ||
4122 | else { /* exhaust dv */ | ||
4123 | size_t dvs = gm->dvsize; | ||
4124 | gm->dvsize = 0; | ||
4125 | gm->dv = 0; | ||
4126 | set_inuse_and_pinuse(gm, p, dvs); | ||
4127 | } | ||
4128 | mem = chunk2mem(p); | ||
4129 | check_malloced_chunk(gm, mem, nb); | ||
4130 | goto postaction; | ||
4131 | } | ||
4132 | |||
4133 | else if (nb < gm->topsize) { /* Split top */ | ||
4134 | size_t rsize = gm->topsize -= nb; | ||
4135 | mchunkptr p = gm->top; | ||
4136 | mchunkptr r = gm->top = chunk_plus_offset(p, nb); | ||
4137 | r->head = rsize | PINUSE_BIT; | ||
4138 | set_size_and_pinuse_of_inuse_chunk(gm, p, nb); | ||
4139 | mem = chunk2mem(p); | ||
4140 | check_top_chunk(gm, gm->top); | ||
4141 | check_malloced_chunk(gm, mem, nb); | ||
4142 | goto postaction; | ||
4143 | } | ||
4144 | |||
4145 | mem = sys_alloc(gm, nb); | ||
4146 | |||
4147 | postaction: | ||
4148 | POSTACTION(gm); | ||
4149 | return mem; | ||
4150 | } | ||
4151 | |||
4152 | return 0; | ||
4153 | } | ||
4154 | |||
4155 | void dlfree(void* mem) { | ||
4156 | /* | ||
4157 | Consolidate freed chunks with preceeding or succeeding bordering | ||
4158 | free chunks, if they exist, and then place in a bin. Intermixed | ||
4159 | with special cases for top, dv, mmapped chunks, and usage errors. | ||
4160 | */ | ||
4161 | |||
4162 | if (mem != 0) { | ||
4163 | mchunkptr p = mem2chunk(mem); | ||
4164 | #if FOOTERS | ||
4165 | mstate fm = get_mstate_for(p); | ||
4166 | if (!ok_magic(fm)) { | ||
4167 | USAGE_ERROR_ACTION(fm, p); | ||
4168 | return; | ||
4169 | } | ||
4170 | #else /* FOOTERS */ | ||
4171 | #define fm gm | ||
4172 | #endif /* FOOTERS */ | ||
4173 | if (!PREACTION(fm)) { | ||
4174 | check_inuse_chunk(fm, p); | ||
4175 | if (RTCHECK(ok_address(fm, p) && ok_cinuse(p))) { | ||
4176 | size_t psize = chunksize(p); | ||
4177 | mchunkptr next = chunk_plus_offset(p, psize); | ||
4178 | if (!pinuse(p)) { | ||
4179 | size_t prevsize = p->prev_foot; | ||
4180 | if ((prevsize & IS_MMAPPED_BIT) != 0) { | ||
4181 | prevsize &= ~IS_MMAPPED_BIT; | ||
4182 | psize += prevsize + MMAP_FOOT_PAD; | ||
4183 | if (CALL_MUNMAP((char*)p - prevsize, psize) == 0) | ||
4184 | fm->footprint -= psize; | ||
4185 | goto postaction; | ||
4186 | } | ||
4187 | else { | ||
4188 | mchunkptr prev = chunk_minus_offset(p, prevsize); | ||
4189 | psize += prevsize; | ||
4190 | p = prev; | ||
4191 | if (RTCHECK(ok_address(fm, prev))) { /* consolidate backward */ | ||
4192 | if (p != fm->dv) { | ||
4193 | unlink_chunk(fm, p, prevsize); | ||
4194 | } | ||
4195 | else if ((next->head & INUSE_BITS) == INUSE_BITS) { | ||
4196 | fm->dvsize = psize; | ||
4197 | set_free_with_pinuse(p, psize, next); | ||
4198 | goto postaction; | ||
4199 | } | ||
4200 | } | ||
4201 | else | ||
4202 | goto erroraction; | ||
4203 | } | ||
4204 | } | ||
4205 | |||
4206 | if (RTCHECK(ok_next(p, next) && ok_pinuse(next))) { | ||
4207 | if (!cinuse(next)) { /* consolidate forward */ | ||
4208 | if (next == fm->top) { | ||
4209 | size_t tsize = fm->topsize += psize; | ||
4210 | fm->top = p; | ||
4211 | p->head = tsize | PINUSE_BIT; | ||
4212 | if (p == fm->dv) { | ||
4213 | fm->dv = 0; | ||
4214 | fm->dvsize = 0; | ||
4215 | } | ||
4216 | if (should_trim(fm, tsize)) | ||
4217 | sys_trim(fm, 0); | ||
4218 | goto postaction; | ||
4219 | } | ||
4220 | else if (next == fm->dv) { | ||
4221 | size_t dsize = fm->dvsize += psize; | ||
4222 | fm->dv = p; | ||
4223 | set_size_and_pinuse_of_free_chunk(p, dsize); | ||
4224 | goto postaction; | ||
4225 | } | ||
4226 | else { | ||
4227 | size_t nsize = chunksize(next); | ||
4228 | psize += nsize; | ||
4229 | unlink_chunk(fm, next, nsize); | ||
4230 | set_size_and_pinuse_of_free_chunk(p, psize); | ||
4231 | if (p == fm->dv) { | ||
4232 | fm->dvsize = psize; | ||
4233 | goto postaction; | ||
4234 | } | ||
4235 | } | ||
4236 | } | ||
4237 | else | ||
4238 | set_free_with_pinuse(p, psize, next); | ||
4239 | insert_chunk(fm, p, psize); | ||
4240 | check_free_chunk(fm, p); | ||
4241 | goto postaction; | ||
4242 | } | ||
4243 | } | ||
4244 | erroraction: | ||
4245 | USAGE_ERROR_ACTION(fm, p); | ||
4246 | postaction: | ||
4247 | POSTACTION(fm); | ||
4248 | } | ||
4249 | } | ||
4250 | #if !FOOTERS | ||
4251 | #undef fm | ||
4252 | #endif /* FOOTERS */ | ||
4253 | } | ||
4254 | |||
4255 | void* dlcalloc(size_t n_elements, size_t elem_size) { | ||
4256 | void* mem; | ||
4257 | size_t req = 0; | ||
4258 | if (n_elements != 0) { | ||
4259 | req = n_elements * elem_size; | ||
4260 | if (((n_elements | elem_size) & ~(size_t)0xffff) && | ||
4261 | (req / n_elements != elem_size)) | ||
4262 | req = MAX_SIZE_T; /* force downstream failure on overflow */ | ||
4263 | } | ||
4264 | mem = dlmalloc(req); | ||
4265 | if (mem != 0 && calloc_must_clear(mem2chunk(mem))) | ||
4266 | memset(mem, 0, req); | ||
4267 | return mem; | ||
4268 | } | ||
4269 | |||
4270 | void* dlrealloc(void* oldmem, size_t bytes) { | ||
4271 | if (oldmem == 0) | ||
4272 | return dlmalloc(bytes); | ||
4273 | #ifdef REALLOC_ZERO_BYTES_FREES | ||
4274 | if (bytes == 0) { | ||
4275 | dlfree(oldmem); | ||
4276 | return 0; | ||
4277 | } | ||
4278 | #endif /* REALLOC_ZERO_BYTES_FREES */ | ||
4279 | else { | ||
4280 | #if ! FOOTERS | ||
4281 | mstate m = gm; | ||
4282 | #else /* FOOTERS */ | ||
4283 | mstate m = get_mstate_for(mem2chunk(oldmem)); | ||
4284 | if (!ok_magic(m)) { | ||
4285 | USAGE_ERROR_ACTION(m, oldmem); | ||
4286 | return 0; | ||
4287 | } | ||
4288 | #endif /* FOOTERS */ | ||
4289 | return internal_realloc(m, oldmem, bytes); | ||
4290 | } | ||
4291 | } | ||
4292 | |||
4293 | void* dlmemalign(size_t alignment, size_t bytes) { | ||
4294 | return internal_memalign(gm, alignment, bytes); | ||
4295 | } | ||
4296 | |||
4297 | void** dlindependent_calloc(size_t n_elements, size_t elem_size, | ||
4298 | void* chunks[]) { | ||
4299 | size_t sz = elem_size; /* serves as 1-element array */ | ||
4300 | return ialloc(gm, n_elements, &sz, 3, chunks); | ||
4301 | } | ||
4302 | |||
4303 | void** dlindependent_comalloc(size_t n_elements, size_t sizes[], | ||
4304 | void* chunks[]) { | ||
4305 | return ialloc(gm, n_elements, sizes, 0, chunks); | ||
4306 | } | ||
4307 | |||
4308 | void* dlvalloc(size_t bytes) { | ||
4309 | size_t pagesz; | ||
4310 | init_mparams(); | ||
4311 | pagesz = mparams.page_size; | ||
4312 | return dlmemalign(pagesz, bytes); | ||
4313 | } | ||
4314 | |||
4315 | void* dlpvalloc(size_t bytes) { | ||
4316 | size_t pagesz; | ||
4317 | init_mparams(); | ||
4318 | pagesz = mparams.page_size; | ||
4319 | return dlmemalign(pagesz, (bytes + pagesz - SIZE_T_ONE) & ~(pagesz - SIZE_T_ONE)); | ||
4320 | } | ||
4321 | |||
4322 | int dlmalloc_trim(size_t pad) { | ||
4323 | int result = 0; | ||
4324 | if (!PREACTION(gm)) { | ||
4325 | result = sys_trim(gm, pad); | ||
4326 | POSTACTION(gm); | ||
4327 | } | ||
4328 | return result; | ||
4329 | } | ||
4330 | |||
4331 | size_t dlmalloc_footprint(void) { | ||
4332 | return gm->footprint; | ||
4333 | } | ||
4334 | |||
4335 | size_t dlmalloc_max_footprint(void) { | ||
4336 | return gm->max_footprint; | ||
4337 | } | ||
4338 | |||
4339 | #if !NO_MALLINFO | ||
4340 | struct mallinfo dlmallinfo(void) { | ||
4341 | return internal_mallinfo(gm); | ||
4342 | } | ||
4343 | #endif /* NO_MALLINFO */ | ||
4344 | |||
4345 | void dlmalloc_stats() { | ||
4346 | internal_malloc_stats(gm); | ||
4347 | } | ||
4348 | |||
4349 | size_t dlmalloc_usable_size(void* mem) { | ||
4350 | if (mem != 0) { | ||
4351 | mchunkptr p = mem2chunk(mem); | ||
4352 | if (cinuse(p)) | ||
4353 | return chunksize(p) - overhead_for(p); | ||
4354 | } | ||
4355 | return 0; | ||
4356 | } | ||
4357 | |||
4358 | int dlmallopt(int param_number, int value) { | ||
4359 | return change_mparam(param_number, value); | ||
4360 | } | ||
4361 | |||
4362 | #endif /* !ONLY_MSPACES */ | ||
4363 | |||
4364 | /* ----------------------------- user mspaces ---------------------------- */ | ||
4365 | |||
4366 | #if MSPACES | ||
4367 | |||
4368 | static mstate init_user_mstate(char* tbase, size_t tsize) { | ||
4369 | size_t msize = pad_request(sizeof(struct malloc_state)); | ||
4370 | mchunkptr mn; | ||
4371 | mchunkptr msp = align_as_chunk(tbase); | ||
4372 | mstate m = (mstate)(chunk2mem(msp)); | ||
4373 | memset(m, 0, msize); | ||
4374 | INITIAL_LOCK(&m->mutex); | ||
4375 | msp->head = (msize|PINUSE_BIT|CINUSE_BIT); | ||
4376 | m->seg.base = m->least_addr = tbase; | ||
4377 | m->seg.size = m->footprint = m->max_footprint = tsize; | ||
4378 | m->magic = mparams.magic; | ||
4379 | m->mflags = mparams.default_mflags; | ||
4380 | disable_contiguous(m); | ||
4381 | init_bins(m); | ||
4382 | mn = next_chunk(mem2chunk(m)); | ||
4383 | init_top(m, mn, (size_t)((tbase + tsize) - (char*)mn) - TOP_FOOT_SIZE); | ||
4384 | check_top_chunk(m, m->top); | ||
4385 | return m; | ||
4386 | } | ||
4387 | |||
4388 | mspace create_mspace(size_t capacity, int locked) { | ||
4389 | mstate m = 0; | ||
4390 | size_t msize = pad_request(sizeof(struct malloc_state)); | ||
4391 | init_mparams(); /* Ensure pagesize etc initialized */ | ||
4392 | |||
4393 | if (capacity < (size_t) -(msize + TOP_FOOT_SIZE + mparams.page_size)) { | ||
4394 | size_t rs = ((capacity == 0)? mparams.granularity : | ||
4395 | (capacity + TOP_FOOT_SIZE + msize)); | ||
4396 | size_t tsize = granularity_align(rs); | ||
4397 | char* tbase = (char*)(CALL_MMAP(tsize)); | ||
4398 | if (tbase != CMFAIL) { | ||
4399 | m = init_user_mstate(tbase, tsize); | ||
4400 | m->seg.sflags = IS_MMAPPED_BIT; | ||
4401 | set_lock(m, locked); | ||
4402 | } | ||
4403 | } | ||
4404 | return (mspace)m; | ||
4405 | } | ||
4406 | |||
4407 | mspace create_mspace_with_base(void* base, size_t capacity, int locked) { | ||
4408 | mstate m = 0; | ||
4409 | size_t msize = pad_request(sizeof(struct malloc_state)); | ||
4410 | init_mparams(); /* Ensure pagesize etc initialized */ | ||
4411 | |||
4412 | if (capacity > msize + TOP_FOOT_SIZE && | ||
4413 | capacity < (size_t) -(msize + TOP_FOOT_SIZE + mparams.page_size)) { | ||
4414 | m = init_user_mstate((char*)base, capacity); | ||
4415 | m->seg.sflags = EXTERN_BIT; | ||
4416 | set_lock(m, locked); | ||
4417 | } | ||
4418 | return (mspace)m; | ||
4419 | } | ||
4420 | |||
4421 | size_t destroy_mspace(mspace msp) { | ||
4422 | size_t freed = 0; | ||
4423 | mstate ms = (mstate)msp; | ||
4424 | if (ok_magic(ms)) { | ||
4425 | msegmentptr sp = &ms->seg; | ||
4426 | while (sp != 0) { | ||
4427 | char* base = sp->base; | ||
4428 | size_t size = sp->size; | ||
4429 | flag_t flag = sp->sflags; | ||
4430 | sp = sp->next; | ||
4431 | if ((flag & IS_MMAPPED_BIT) && !(flag & EXTERN_BIT) && | ||
4432 | CALL_MUNMAP(base, size) == 0) | ||
4433 | freed += size; | ||
4434 | } | ||
4435 | } | ||
4436 | else { | ||
4437 | USAGE_ERROR_ACTION(ms,ms); | ||
4438 | } | ||
4439 | return freed; | ||
4440 | } | ||
4441 | |||
4442 | /* | ||
4443 | mspace versions of routines are near-clones of the global | ||
4444 | versions. This is not so nice but better than the alternatives. | ||
4445 | */ | ||
4446 | |||
4447 | |||
4448 | void* mspace_malloc(mspace msp, size_t bytes) { | ||
4449 | mstate ms = (mstate)msp; | ||
4450 | if (!ok_magic(ms)) { | ||
4451 | USAGE_ERROR_ACTION(ms,ms); | ||
4452 | return 0; | ||
4453 | } | ||
4454 | if (!PREACTION(ms)) { | ||
4455 | void* mem; | ||
4456 | size_t nb; | ||
4457 | if (bytes <= MAX_SMALL_REQUEST) { | ||
4458 | bindex_t idx; | ||
4459 | binmap_t smallbits; | ||
4460 | nb = (bytes < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(bytes); | ||
4461 | idx = small_index(nb); | ||
4462 | smallbits = ms->smallmap >> idx; | ||
4463 | |||
4464 | if ((smallbits & 0x3U) != 0) { /* Remainderless fit to a smallbin. */ | ||
4465 | mchunkptr b, p; | ||
4466 | idx += ~smallbits & 1; /* Uses next bin if idx empty */ | ||
4467 | b = smallbin_at(ms, idx); | ||
4468 | p = b->fd; | ||
4469 | assert(chunksize(p) == small_index2size(idx)); | ||
4470 | unlink_first_small_chunk(ms, b, p, idx); | ||
4471 | set_inuse_and_pinuse(ms, p, small_index2size(idx)); | ||
4472 | mem = chunk2mem(p); | ||
4473 | check_malloced_chunk(ms, mem, nb); | ||
4474 | goto postaction; | ||
4475 | } | ||
4476 | |||
4477 | else if (nb > ms->dvsize) { | ||
4478 | if (smallbits != 0) { /* Use chunk in next nonempty smallbin */ | ||
4479 | mchunkptr b, p, r; | ||
4480 | size_t rsize; | ||
4481 | bindex_t i; | ||
4482 | binmap_t leftbits = (smallbits << idx) & left_bits(idx2bit(idx)); | ||
4483 | binmap_t leastbit = least_bit(leftbits); | ||
4484 | compute_bit2idx(leastbit, i); | ||
4485 | b = smallbin_at(ms, i); | ||
4486 | p = b->fd; | ||
4487 | assert(chunksize(p) == small_index2size(i)); | ||
4488 | unlink_first_small_chunk(ms, b, p, i); | ||
4489 | rsize = small_index2size(i) - nb; | ||
4490 | /* Fit here cannot be remainderless if 4byte sizes */ | ||
4491 | if (SIZE_T_SIZE != 4 && rsize < MIN_CHUNK_SIZE) | ||
4492 | set_inuse_and_pinuse(ms, p, small_index2size(i)); | ||
4493 | else { | ||
4494 | set_size_and_pinuse_of_inuse_chunk(ms, p, nb); | ||
4495 | r = chunk_plus_offset(p, nb); | ||
4496 | set_size_and_pinuse_of_free_chunk(r, rsize); | ||
4497 | replace_dv(ms, r, rsize); | ||
4498 | } | ||
4499 | mem = chunk2mem(p); | ||
4500 | check_malloced_chunk(ms, mem, nb); | ||
4501 | goto postaction; | ||
4502 | } | ||
4503 | |||
4504 | else if (ms->treemap != 0 && (mem = tmalloc_small(ms, nb)) != 0) { | ||
4505 | check_malloced_chunk(ms, mem, nb); | ||
4506 | goto postaction; | ||
4507 | } | ||
4508 | } | ||
4509 | } | ||
4510 | else if (bytes >= MAX_REQUEST) | ||
4511 | nb = MAX_SIZE_T; /* Too big to allocate. Force failure (in sys alloc) */ | ||
4512 | else { | ||
4513 | nb = pad_request(bytes); | ||
4514 | if (ms->treemap != 0 && (mem = tmalloc_large(ms, nb)) != 0) { | ||
4515 | check_malloced_chunk(ms, mem, nb); | ||
4516 | goto postaction; | ||
4517 | } | ||
4518 | } | ||
4519 | |||
4520 | if (nb <= ms->dvsize) { | ||
4521 | size_t rsize = ms->dvsize - nb; | ||
4522 | mchunkptr p = ms->dv; | ||
4523 | if (rsize >= MIN_CHUNK_SIZE) { /* split dv */ | ||
4524 | mchunkptr r = ms->dv = chunk_plus_offset(p, nb); | ||
4525 | ms->dvsize = rsize; | ||
4526 | set_size_and_pinuse_of_free_chunk(r, rsize); | ||
4527 | set_size_and_pinuse_of_inuse_chunk(ms, p, nb); | ||
4528 | } | ||
4529 | else { /* exhaust dv */ | ||
4530 | size_t dvs = ms->dvsize; | ||
4531 | ms->dvsize = 0; | ||
4532 | ms->dv = 0; | ||
4533 | set_inuse_and_pinuse(ms, p, dvs); | ||
4534 | } | ||
4535 | mem = chunk2mem(p); | ||
4536 | check_malloced_chunk(ms, mem, nb); | ||
4537 | goto postaction; | ||
4538 | } | ||
4539 | |||
4540 | else if (nb < ms->topsize) { /* Split top */ | ||
4541 | size_t rsize = ms->topsize -= nb; | ||
4542 | mchunkptr p = ms->top; | ||
4543 | mchunkptr r = ms->top = chunk_plus_offset(p, nb); | ||
4544 | r->head = rsize | PINUSE_BIT; | ||
4545 | set_size_and_pinuse_of_inuse_chunk(ms, p, nb); | ||
4546 | mem = chunk2mem(p); | ||
4547 | check_top_chunk(ms, ms->top); | ||
4548 | check_malloced_chunk(ms, mem, nb); | ||
4549 | goto postaction; | ||
4550 | } | ||
4551 | |||
4552 | mem = sys_alloc(ms, nb); | ||
4553 | |||
4554 | postaction: | ||
4555 | POSTACTION(ms); | ||
4556 | return mem; | ||
4557 | } | ||
4558 | |||
4559 | return 0; | ||
4560 | } | ||
4561 | |||
4562 | void mspace_free(mspace msp, void* mem) { | ||
4563 | if (mem != 0) { | ||
4564 | mchunkptr p = mem2chunk(mem); | ||
4565 | #if FOOTERS | ||
4566 | mstate fm = get_mstate_for(p); | ||
4567 | #else /* FOOTERS */ | ||
4568 | mstate fm = (mstate)msp; | ||
4569 | #endif /* FOOTERS */ | ||
4570 | if (!ok_magic(fm)) { | ||
4571 | USAGE_ERROR_ACTION(fm, p); | ||
4572 | return; | ||
4573 | } | ||
4574 | if (!PREACTION(fm)) { | ||
4575 | check_inuse_chunk(fm, p); | ||
4576 | if (RTCHECK(ok_address(fm, p) && ok_cinuse(p))) { | ||
4577 | size_t psize = chunksize(p); | ||
4578 | mchunkptr next = chunk_plus_offset(p, psize); | ||
4579 | if (!pinuse(p)) { | ||
4580 | size_t prevsize = p->prev_foot; | ||
4581 | if ((prevsize & IS_MMAPPED_BIT) != 0) { | ||
4582 | prevsize &= ~IS_MMAPPED_BIT; | ||
4583 | psize += prevsize + MMAP_FOOT_PAD; | ||
4584 | if (CALL_MUNMAP((char*)p - prevsize, psize) == 0) | ||
4585 | fm->footprint -= psize; | ||
4586 | goto postaction; | ||
4587 | } | ||
4588 | else { | ||
4589 | mchunkptr prev = chunk_minus_offset(p, prevsize); | ||
4590 | psize += prevsize; | ||
4591 | p = prev; | ||
4592 | if (RTCHECK(ok_address(fm, prev))) { /* consolidate backward */ | ||
4593 | if (p != fm->dv) { | ||
4594 | unlink_chunk(fm, p, prevsize); | ||
4595 | } | ||
4596 | else if ((next->head & INUSE_BITS) == INUSE_BITS) { | ||
4597 | fm->dvsize = psize; | ||
4598 | set_free_with_pinuse(p, psize, next); | ||
4599 | goto postaction; | ||
4600 | } | ||
4601 | } | ||
4602 | else | ||
4603 | goto erroraction; | ||
4604 | } | ||
4605 | } | ||
4606 | |||
4607 | if (RTCHECK(ok_next(p, next) && ok_pinuse(next))) { | ||
4608 | if (!cinuse(next)) { /* consolidate forward */ | ||
4609 | if (next == fm->top) { | ||
4610 | size_t tsize = fm->topsize += psize; | ||
4611 | fm->top = p; | ||
4612 | p->head = tsize | PINUSE_BIT; | ||
4613 | if (p == fm->dv) { | ||
4614 | fm->dv = 0; | ||
4615 | fm->dvsize = 0; | ||
4616 | } | ||
4617 | if (should_trim(fm, tsize)) | ||
4618 | sys_trim(fm, 0); | ||
4619 | goto postaction; | ||
4620 | } | ||
4621 | else if (next == fm->dv) { | ||
4622 | size_t dsize = fm->dvsize += psize; | ||
4623 | fm->dv = p; | ||
4624 | set_size_and_pinuse_of_free_chunk(p, dsize); | ||
4625 | goto postaction; | ||
4626 | } | ||
4627 | else { | ||
4628 | size_t nsize = chunksize(next); | ||
4629 | psize += nsize; | ||
4630 | unlink_chunk(fm, next, nsize); | ||
4631 | set_size_and_pinuse_of_free_chunk(p, psize); | ||
4632 | if (p == fm->dv) { | ||
4633 | fm->dvsize = psize; | ||
4634 | goto postaction; | ||
4635 | } | ||
4636 | } | ||
4637 | } | ||
4638 | else | ||
4639 | set_free_with_pinuse(p, psize, next); | ||
4640 | insert_chunk(fm, p, psize); | ||
4641 | check_free_chunk(fm, p); | ||
4642 | goto postaction; | ||
4643 | } | ||
4644 | } | ||
4645 | erroraction: | ||
4646 | USAGE_ERROR_ACTION(fm, p); | ||
4647 | postaction: | ||
4648 | POSTACTION(fm); | ||
4649 | } | ||
4650 | } | ||
4651 | } | ||
4652 | |||
4653 | void* mspace_calloc(mspace msp, size_t n_elements, size_t elem_size) { | ||
4654 | void* mem; | ||
4655 | size_t req = 0; | ||
4656 | mstate ms = (mstate)msp; | ||
4657 | if (!ok_magic(ms)) { | ||
4658 | USAGE_ERROR_ACTION(ms,ms); | ||
4659 | return 0; | ||
4660 | } | ||
4661 | if (n_elements != 0) { | ||
4662 | req = n_elements * elem_size; | ||
4663 | if (((n_elements | elem_size) & ~(size_t)0xffff) && | ||
4664 | (req / n_elements != elem_size)) | ||
4665 | req = MAX_SIZE_T; /* force downstream failure on overflow */ | ||
4666 | } | ||
4667 | mem = internal_malloc(ms, req); | ||
4668 | if (mem != 0 && calloc_must_clear(mem2chunk(mem))) | ||
4669 | memset(mem, 0, req); | ||
4670 | return mem; | ||
4671 | } | ||
4672 | |||
4673 | void* mspace_realloc(mspace msp, void* oldmem, size_t bytes) { | ||
4674 | if (oldmem == 0) | ||
4675 | return mspace_malloc(msp, bytes); | ||
4676 | #ifdef REALLOC_ZERO_BYTES_FREES | ||
4677 | if (bytes == 0) { | ||
4678 | mspace_free(msp, oldmem); | ||
4679 | return 0; | ||
4680 | } | ||
4681 | #endif /* REALLOC_ZERO_BYTES_FREES */ | ||
4682 | else { | ||
4683 | #if FOOTERS | ||
4684 | mchunkptr p = mem2chunk(oldmem); | ||
4685 | mstate ms = get_mstate_for(p); | ||
4686 | #else /* FOOTERS */ | ||
4687 | mstate ms = (mstate)msp; | ||
4688 | #endif /* FOOTERS */ | ||
4689 | if (!ok_magic(ms)) { | ||
4690 | USAGE_ERROR_ACTION(ms,ms); | ||
4691 | return 0; | ||
4692 | } | ||
4693 | return internal_realloc(ms, oldmem, bytes); | ||
4694 | } | ||
4695 | } | ||
4696 | |||
4697 | void* mspace_memalign(mspace msp, size_t alignment, size_t bytes) { | ||
4698 | mstate ms = (mstate)msp; | ||
4699 | if (!ok_magic(ms)) { | ||
4700 | USAGE_ERROR_ACTION(ms,ms); | ||
4701 | return 0; | ||
4702 | } | ||
4703 | return internal_memalign(ms, alignment, bytes); | ||
4704 | } | ||
4705 | |||
4706 | void** mspace_independent_calloc(mspace msp, size_t n_elements, | ||
4707 | size_t elem_size, void* chunks[]) { | ||
4708 | size_t sz = elem_size; /* serves as 1-element array */ | ||
4709 | mstate ms = (mstate)msp; | ||
4710 | if (!ok_magic(ms)) { | ||
4711 | USAGE_ERROR_ACTION(ms,ms); | ||
4712 | return 0; | ||
4713 | } | ||
4714 | return ialloc(ms, n_elements, &sz, 3, chunks); | ||
4715 | } | ||
4716 | |||
4717 | void** mspace_independent_comalloc(mspace msp, size_t n_elements, | ||
4718 | size_t sizes[], void* chunks[]) { | ||
4719 | mstate ms = (mstate)msp; | ||
4720 | if (!ok_magic(ms)) { | ||
4721 | USAGE_ERROR_ACTION(ms,ms); | ||
4722 | return 0; | ||
4723 | } | ||
4724 | return ialloc(ms, n_elements, sizes, 0, chunks); | ||
4725 | } | ||
4726 | |||
4727 | int mspace_trim(mspace msp, size_t pad) { | ||
4728 | int result = 0; | ||
4729 | mstate ms = (mstate)msp; | ||
4730 | if (ok_magic(ms)) { | ||
4731 | if (!PREACTION(ms)) { | ||
4732 | result = sys_trim(ms, pad); | ||
4733 | POSTACTION(ms); | ||
4734 | } | ||
4735 | } | ||
4736 | else { | ||
4737 | USAGE_ERROR_ACTION(ms,ms); | ||
4738 | } | ||
4739 | return result; | ||
4740 | } | ||
4741 | |||
4742 | void mspace_malloc_stats(mspace msp) { | ||
4743 | mstate ms = (mstate)msp; | ||
4744 | if (ok_magic(ms)) { | ||
4745 | internal_malloc_stats(ms); | ||
4746 | } | ||
4747 | else { | ||
4748 | USAGE_ERROR_ACTION(ms,ms); | ||
4749 | } | ||
4750 | } | ||
4751 | |||
4752 | size_t mspace_footprint(mspace msp) { | ||
4753 | size_t result; | ||
4754 | mstate ms = (mstate)msp; | ||
4755 | if (ok_magic(ms)) { | ||
4756 | result = ms->footprint; | ||
4757 | } | ||
4758 | USAGE_ERROR_ACTION(ms,ms); | ||
4759 | return result; | ||
4760 | } | ||
4761 | |||
4762 | |||
4763 | size_t mspace_max_footprint(mspace msp) { | ||
4764 | size_t result; | ||
4765 | mstate ms = (mstate)msp; | ||
4766 | if (ok_magic(ms)) { | ||
4767 | result = ms->max_footprint; | ||
4768 | } | ||
4769 | USAGE_ERROR_ACTION(ms,ms); | ||
4770 | return result; | ||
4771 | } | ||
4772 | |||
4773 | |||
4774 | #if !NO_MALLINFO | ||
4775 | struct mallinfo mspace_mallinfo(mspace msp) { | ||
4776 | mstate ms = (mstate)msp; | ||
4777 | if (!ok_magic(ms)) { | ||
4778 | USAGE_ERROR_ACTION(ms,ms); | ||
4779 | } | ||
4780 | return internal_mallinfo(ms); | ||
4781 | } | ||
4782 | #endif /* NO_MALLINFO */ | ||
4783 | |||
4784 | int mspace_mallopt(int param_number, int value) { | ||
4785 | return change_mparam(param_number, value); | ||
4786 | } | ||
4787 | |||
4788 | #endif /* MSPACES */ | ||
4789 | |||
4790 | /* -------------------- Alternative MORECORE functions ------------------- */ | ||
4791 | |||
4792 | /* | ||
4793 | Guidelines for creating a custom version of MORECORE: | ||
4794 | |||
4795 | * For best performance, MORECORE should allocate in multiples of pagesize. | ||
4796 | * MORECORE may allocate more memory than requested. (Or even less, | ||
4797 | but this will usually result in a malloc failure.) | ||
4798 | * MORECORE must not allocate memory when given argument zero, but | ||
4799 | instead return one past the end address of memory from previous | ||
4800 | nonzero call. | ||
4801 | * For best performance, consecutive calls to MORECORE with positive | ||
4802 | arguments should return increasing addresses, indicating that | ||
4803 | space has been contiguously extended. | ||
4804 | * Even though consecutive calls to MORECORE need not return contiguous | ||
4805 | addresses, it must be OK for malloc'ed chunks to span multiple | ||
4806 | regions in those cases where they do happen to be contiguous. | ||
4807 | * MORECORE need not handle negative arguments -- it may instead | ||
4808 | just return MFAIL when given negative arguments. | ||
4809 | Negative arguments are always multiples of pagesize. MORECORE | ||
4810 | must not misinterpret negative args as large positive unsigned | ||
4811 | args. You can suppress all such calls from even occurring by defining | ||
4812 | MORECORE_CANNOT_TRIM, | ||
4813 | |||
4814 | As an example alternative MORECORE, here is a custom allocator | ||
4815 | kindly contributed for pre-OSX macOS. It uses virtually but not | ||
4816 | necessarily physically contiguous non-paged memory (locked in, | ||
4817 | present and won't get swapped out). You can use it by uncommenting | ||
4818 | this section, adding some #includes, and setting up the appropriate | ||
4819 | defines above: | ||
4820 | |||
4821 | #define MORECORE osMoreCore | ||
4822 | |||
4823 | There is also a shutdown routine that should somehow be called for | ||
4824 | cleanup upon program exit. | ||
4825 | |||
4826 | #define MAX_POOL_ENTRIES 100 | ||
4827 | #define MINIMUM_MORECORE_SIZE (64 * 1024U) | ||
4828 | static int next_os_pool; | ||
4829 | void *our_os_pools[MAX_POOL_ENTRIES]; | ||
4830 | |||
4831 | void *osMoreCore(int size) | ||
4832 | { | ||
4833 | void *ptr = 0; | ||
4834 | static void *sbrk_top = 0; | ||
4835 | |||
4836 | if (size > 0) | ||
4837 | { | ||
4838 | if (size < MINIMUM_MORECORE_SIZE) | ||
4839 | size = MINIMUM_MORECORE_SIZE; | ||
4840 | if (CurrentExecutionLevel() == kTaskLevel) | ||
4841 | ptr = PoolAllocateResident(size + RM_PAGE_SIZE, 0); | ||
4842 | if (ptr == 0) | ||
4843 | { | ||
4844 | return (void *) MFAIL; | ||
4845 | } | ||
4846 | // save ptrs so they can be freed during cleanup | ||
4847 | our_os_pools[next_os_pool] = ptr; | ||
4848 | next_os_pool++; | ||
4849 | ptr = (void *) ((((size_t) ptr) + RM_PAGE_MASK) & ~RM_PAGE_MASK); | ||
4850 | sbrk_top = (char *) ptr + size; | ||
4851 | return ptr; | ||
4852 | } | ||
4853 | else if (size < 0) | ||
4854 | { | ||
4855 | // we don't currently support shrink behavior | ||
4856 | return (void *) MFAIL; | ||
4857 | } | ||
4858 | else | ||
4859 | { | ||
4860 | return sbrk_top; | ||
4861 | } | ||
4862 | } | ||
4863 | |||
4864 | // cleanup any allocated memory pools | ||
4865 | // called as last thing before shutting down driver | ||
4866 | |||
4867 | void osCleanupMem(void) | ||
4868 | { | ||
4869 | void **ptr; | ||
4870 | |||
4871 | for (ptr = our_os_pools; ptr < &our_os_pools[MAX_POOL_ENTRIES]; ptr++) | ||
4872 | if (*ptr) | ||
4873 | { | ||
4874 | PoolDeallocate(*ptr); | ||
4875 | *ptr = 0; | ||
4876 | } | ||
4877 | } | ||
4878 | |||
4879 | */ | ||
4880 | |||
4881 | |||
4882 | /* ----------------------------------------------------------------------- | ||
4883 | History: | ||
4884 | V2.8.3 Thu Sep 22 11:16:32 2005 Doug Lea (dl at gee) | ||
4885 | * Add max_footprint functions | ||
4886 | * Ensure all appropriate literals are size_t | ||
4887 | * Fix conditional compilation problem for some #define settings | ||
4888 | * Avoid concatenating segments with the one provided | ||
4889 | in create_mspace_with_base | ||
4890 | * Rename some variables to avoid compiler shadowing warnings | ||
4891 | * Use explicit lock initialization. | ||
4892 | * Better handling of sbrk interference. | ||
4893 | * Simplify and fix segment insertion, trimming and mspace_destroy | ||
4894 | * Reinstate REALLOC_ZERO_BYTES_FREES option from 2.7.x | ||
4895 | * Thanks especially to Dennis Flanagan for help on these. | ||
4896 | |||
4897 | V2.8.2 Sun Jun 12 16:01:10 2005 Doug Lea (dl at gee) | ||
4898 | * Fix memalign brace error. | ||
4899 | |||
4900 | V2.8.1 Wed Jun 8 16:11:46 2005 Doug Lea (dl at gee) | ||
4901 | * Fix improper #endif nesting in C++ | ||
4902 | * Add explicit casts needed for C++ | ||
4903 | |||
4904 | V2.8.0 Mon May 30 14:09:02 2005 Doug Lea (dl at gee) | ||
4905 | * Use trees for large bins | ||
4906 | * Support mspaces | ||
4907 | * Use segments to unify sbrk-based and mmap-based system allocation, | ||
4908 | removing need for emulation on most platforms without sbrk. | ||
4909 | * Default safety checks | ||
4910 | * Optional footer checks. Thanks to William Robertson for the idea. | ||
4911 | * Internal code refactoring | ||
4912 | * Incorporate suggestions and platform-specific changes. | ||
4913 | Thanks to Dennis Flanagan, Colin Plumb, Niall Douglas, | ||
4914 | Aaron Bachmann, Emery Berger, and others. | ||
4915 | * Speed up non-fastbin processing enough to remove fastbins. | ||
4916 | * Remove useless cfree() to avoid conflicts with other apps. | ||
4917 | * Remove internal memcpy, memset. Compilers handle builtins better. | ||
4918 | * Remove some options that no one ever used and rename others. | ||
4919 | |||
4920 | V2.7.2 Sat Aug 17 09:07:30 2002 Doug Lea (dl at gee) | ||
4921 | * Fix malloc_state bitmap array misdeclaration | ||
4922 | |||
4923 | V2.7.1 Thu Jul 25 10:58:03 2002 Doug Lea (dl at gee) | ||
4924 | * Allow tuning of FIRST_SORTED_BIN_SIZE | ||
4925 | * Use PTR_UINT as type for all ptr->int casts. Thanks to John Belmonte. | ||
4926 | * Better detection and support for non-contiguousness of MORECORE. | ||
4927 | Thanks to Andreas Mueller, Conal Walsh, and Wolfram Gloger | ||
4928 | * Bypass most of malloc if no frees. Thanks To Emery Berger. | ||
4929 | * Fix freeing of old top non-contiguous chunk im sysmalloc. | ||
4930 | * Raised default trim and map thresholds to 256K. | ||
4931 | * Fix mmap-related #defines. Thanks to Lubos Lunak. | ||
4932 | * Fix copy macros; added LACKS_FCNTL_H. Thanks to Neal Walfield. | ||
4933 | * Branch-free bin calculation | ||
4934 | * Default trim and mmap thresholds now 256K. | ||
4935 | |||
4936 | V2.7.0 Sun Mar 11 14:14:06 2001 Doug Lea (dl at gee) | ||
4937 | * Introduce independent_comalloc and independent_calloc. | ||
4938 | Thanks to Michael Pachos for motivation and help. | ||
4939 | * Make optional .h file available | ||
4940 | * Allow > 2GB requests on 32bit systems. | ||
4941 | * new WIN32 sbrk, mmap, munmap, lock code from <Walter@GeNeSys-e.de>. | ||
4942 | Thanks also to Andreas Mueller <a.mueller at paradatec.de>, | ||
4943 | and Anonymous. | ||
4944 | * Allow override of MALLOC_ALIGNMENT (Thanks to Ruud Waij for | ||
4945 | helping test this.) | ||
4946 | * memalign: check alignment arg | ||
4947 | * realloc: don't try to shift chunks backwards, since this | ||
4948 | leads to more fragmentation in some programs and doesn't | ||
4949 | seem to help in any others. | ||
4950 | * Collect all cases in malloc requiring system memory into sysmalloc | ||
4951 | * Use mmap as backup to sbrk | ||
4952 | * Place all internal state in malloc_state | ||
4953 | * Introduce fastbins (although similar to 2.5.1) | ||
4954 | * Many minor tunings and cosmetic improvements | ||
4955 | * Introduce USE_PUBLIC_MALLOC_WRAPPERS, USE_MALLOC_LOCK | ||
4956 | * Introduce MALLOC_FAILURE_ACTION, MORECORE_CONTIGUOUS | ||
4957 | Thanks to Tony E. Bennett <tbennett@nvidia.com> and others. | ||
4958 | * Include errno.h to support default failure action. | ||
4959 | |||
4960 | V2.6.6 Sun Dec 5 07:42:19 1999 Doug Lea (dl at gee) | ||
4961 | * return null for negative arguments | ||
4962 | * Added Several WIN32 cleanups from Martin C. Fong <mcfong at yahoo.com> | ||
4963 | * Add 'LACKS_SYS_PARAM_H' for those systems without 'sys/param.h' | ||
4964 | (e.g. WIN32 platforms) | ||
4965 | * Cleanup header file inclusion for WIN32 platforms | ||
4966 | * Cleanup code to avoid Microsoft Visual C++ compiler complaints | ||
4967 | * Add 'USE_DL_PREFIX' to quickly allow co-existence with existing | ||
4968 | memory allocation routines | ||
4969 | * Set 'malloc_getpagesize' for WIN32 platforms (needs more work) | ||
4970 | * Use 'assert' rather than 'ASSERT' in WIN32 code to conform to | ||
4971 | usage of 'assert' in non-WIN32 code | ||
4972 | * Improve WIN32 'sbrk()' emulation's 'findRegion()' routine to | ||
4973 | avoid infinite loop | ||
4974 | * Always call 'fREe()' rather than 'free()' | ||
4975 | |||
4976 | V2.6.5 Wed Jun 17 15:57:31 1998 Doug Lea (dl at gee) | ||
4977 | * Fixed ordering problem with boundary-stamping | ||
4978 | |||
4979 | V2.6.3 Sun May 19 08:17:58 1996 Doug Lea (dl at gee) | ||
4980 | * Added pvalloc, as recommended by H.J. Liu | ||
4981 | * Added 64bit pointer support mainly from Wolfram Gloger | ||
4982 | * Added anonymously donated WIN32 sbrk emulation | ||
4983 | * Malloc, calloc, getpagesize: add optimizations from Raymond Nijssen | ||
4984 | * malloc_extend_top: fix mask error that caused wastage after | ||
4985 | foreign sbrks | ||
4986 | * Add linux mremap support code from HJ Liu | ||
4987 | |||
4988 | V2.6.2 Tue Dec 5 06:52:55 1995 Doug Lea (dl at gee) | ||
4989 | * Integrated most documentation with the code. | ||
4990 | * Add support for mmap, with help from | ||
4991 | Wolfram Gloger (Gloger@lrz.uni-muenchen.de). | ||
4992 | * Use last_remainder in more cases. | ||
4993 | * Pack bins using idea from colin@nyx10.cs.du.edu | ||
4994 | * Use ordered bins instead of best-fit threshhold | ||
4995 | * Eliminate block-local decls to simplify tracing and debugging. | ||
4996 | * Support another case of realloc via move into top | ||
4997 | * Fix error occuring when initial sbrk_base not word-aligned. | ||
4998 | * Rely on page size for units instead of SBRK_UNIT to | ||
4999 | avoid surprises about sbrk alignment conventions. | ||
5000 | * Add mallinfo, mallopt. Thanks to Raymond Nijssen | ||
5001 | (raymond@es.ele.tue.nl) for the suggestion. | ||
5002 | * Add `pad' argument to malloc_trim and top_pad mallopt parameter. | ||
5003 | * More precautions for cases where other routines call sbrk, | ||
5004 | courtesy of Wolfram Gloger (Gloger@lrz.uni-muenchen.de). | ||
5005 | * Added macros etc., allowing use in linux libc from | ||
5006 | H.J. Lu (hjl@gnu.ai.mit.edu) | ||
5007 | * Inverted this history list | ||
5008 | |||
5009 | V2.6.1 Sat Dec 2 14:10:57 1995 Doug Lea (dl at gee) | ||
5010 | * Re-tuned and fixed to behave more nicely with V2.6.0 changes. | ||
5011 | * Removed all preallocation code since under current scheme | ||
5012 | the work required to undo bad preallocations exceeds | ||
5013 | the work saved in good cases for most test programs. | ||
5014 | * No longer use return list or unconsolidated bins since | ||
5015 | no scheme using them consistently outperforms those that don't | ||
5016 | given above changes. | ||
5017 | * Use best fit for very large chunks to prevent some worst-cases. | ||
5018 | * Added some support for debugging | ||
5019 | |||
5020 | V2.6.0 Sat Nov 4 07:05:23 1995 Doug Lea (dl at gee) | ||
5021 | * Removed footers when chunks are in use. Thanks to | ||
5022 | Paul Wilson (wilson@cs.texas.edu) for the suggestion. | ||
5023 | |||
5024 | V2.5.4 Wed Nov 1 07:54:51 1995 Doug Lea (dl at gee) | ||
5025 | * Added malloc_trim, with help from Wolfram Gloger | ||
5026 | (wmglo@Dent.MED.Uni-Muenchen.DE). | ||
5027 | |||
5028 | V2.5.3 Tue Apr 26 10:16:01 1994 Doug Lea (dl at g) | ||
5029 | |||
5030 | V2.5.2 Tue Apr 5 16:20:40 1994 Doug Lea (dl at g) | ||
5031 | * realloc: try to expand in both directions | ||
5032 | * malloc: swap order of clean-bin strategy; | ||
5033 | * realloc: only conditionally expand backwards | ||
5034 | * Try not to scavenge used bins | ||
5035 | * Use bin counts as a guide to preallocation | ||
5036 | * Occasionally bin return list chunks in first scan | ||
5037 | * Add a few optimizations from colin@nyx10.cs.du.edu | ||
5038 | |||
5039 | V2.5.1 Sat Aug 14 15:40:43 1993 Doug Lea (dl at g) | ||
5040 | * faster bin computation & slightly different binning | ||
5041 | * merged all consolidations to one part of malloc proper | ||
5042 | (eliminating old malloc_find_space & malloc_clean_bin) | ||
5043 | * Scan 2 returns chunks (not just 1) | ||
5044 | * Propagate failure in realloc if malloc returns 0 | ||
5045 | * Add stuff to allow compilation on non-ANSI compilers | ||
5046 | from kpv@research.att.com | ||
5047 | |||
5048 | V2.5 Sat Aug 7 07:41:59 1993 Doug Lea (dl at g.oswego.edu) | ||
5049 | * removed potential for odd address access in prev_chunk | ||
5050 | * removed dependency on getpagesize.h | ||
5051 | * misc cosmetics and a bit more internal documentation | ||
5052 | * anticosmetics: mangled names in macros to evade debugger strangeness | ||
5053 | * tested on sparc, hp-700, dec-mips, rs6000 | ||
5054 | with gcc & native cc (hp, dec only) allowing | ||
5055 | Detlefs & Zorn comparison study (in SIGPLAN Notices.) | ||
5056 | |||
5057 | Trial version Fri Aug 28 13:14:29 1992 Doug Lea (dl at g.oswego.edu) | ||
5058 | * Based loosely on libg++-1.2X malloc. (It retains some of the overall | ||
5059 | structure of old version, but most details differ.) | ||
5060 | |||
5061 | */ | ||
diff --git a/apps/plugins/lua/rockaux.c b/apps/plugins/lua/rockaux.c new file mode 100644 index 0000000000..2213420ce2 --- /dev/null +++ b/apps/plugins/lua/rockaux.c | |||
@@ -0,0 +1,61 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * String function implementations taken from dietlibc 0.31 (GPLv2 License) | ||
12 | * | ||
13 | * This program is free software; you can redistribute it and/or | ||
14 | * modify it under the terms of the GNU General Public License | ||
15 | * as published by the Free Software Foundation; either version 2 | ||
16 | * of the License, or (at your option) any later version. | ||
17 | * | ||
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
19 | * KIND, either express or implied. | ||
20 | * | ||
21 | ****************************************************************************/ | ||
22 | |||
23 | #include "plugin.h" | ||
24 | |||
25 | #ifndef SIMULATOR | ||
26 | int errno = 0; | ||
27 | #endif | ||
28 | |||
29 | char *strerror(int errnum) | ||
30 | { | ||
31 | (void) errnum; | ||
32 | |||
33 | DEBUGF("strerror()\n"); | ||
34 | |||
35 | return NULL; | ||
36 | } | ||
37 | |||
38 | long floor(long x) | ||
39 | { | ||
40 | (void) x; | ||
41 | |||
42 | DEBUGF("floor()\n"); | ||
43 | |||
44 | return 0; | ||
45 | } | ||
46 | |||
47 | long pow(long x, long y) | ||
48 | { | ||
49 | (void) x; | ||
50 | (void) y; | ||
51 | |||
52 | DEBUGF("pow()\n"); | ||
53 | |||
54 | return 0; | ||
55 | } | ||
56 | |||
57 | int strcoll(const char * str1, const char * str2) | ||
58 | { | ||
59 | return rb->strcmp(str1, str2); | ||
60 | } | ||
61 | |||
diff --git a/apps/plugins/lua/rockconf.h b/apps/plugins/lua/rockconf.h new file mode 100644 index 0000000000..7ae2245c3a --- /dev/null +++ b/apps/plugins/lua/rockconf.h | |||
@@ -0,0 +1,64 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #ifndef _ROCKCONF_H_ | ||
23 | #define _ROCKCONF_H_ | ||
24 | |||
25 | #include "plugin.h" | ||
26 | |||
27 | #undef LUAI_THROW | ||
28 | #undef LUAI_TRY | ||
29 | #undef luai_jmpbuf | ||
30 | |||
31 | #ifndef SIMULATOR | ||
32 | #include "../../codecs/lib/setjmp.h" | ||
33 | #else | ||
34 | #include <setjmp.h> | ||
35 | #endif | ||
36 | |||
37 | #include "lib/pluginlib_exit.h" | ||
38 | |||
39 | #define LUAI_THROW(L,c) longjmp((c)->b, 1) | ||
40 | #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a } | ||
41 | #define luai_jmpbuf jmp_buf | ||
42 | |||
43 | extern char curpath[MAX_PATH]; | ||
44 | void *dlrealloc(void *ptr, size_t size); | ||
45 | void dlfree(void *ptr); | ||
46 | long strtol(const char *nptr, char **endptr, int base); | ||
47 | unsigned long strtoul(const char *str, char **endptr, int base); | ||
48 | long floor(long x); | ||
49 | long pow(long x, long y); | ||
50 | |||
51 | /* Simple substitutions */ | ||
52 | #define realloc dlrealloc | ||
53 | #define free dlfree | ||
54 | #define memchr rb->memchr | ||
55 | #define snprintf rb->snprintf | ||
56 | #define strcat rb->strcat | ||
57 | #define strchr rb->strchr | ||
58 | #define strcmp rb->strcmp | ||
59 | #define strcpy rb->strcpy | ||
60 | #define strncpy rb->strncpy | ||
61 | #define strlen rb->strlen | ||
62 | |||
63 | #endif /* _ROCKCONF_H_ */ | ||
64 | |||
diff --git a/apps/plugins/lua/rocklib.c b/apps/plugins/lua/rocklib.c new file mode 100644 index 0000000000..60c51f3206 --- /dev/null +++ b/apps/plugins/lua/rocklib.c | |||
@@ -0,0 +1,364 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * Copyright (C) 2009 Maurus Cuelenaere | ||
12 | * | ||
13 | * This program is free software; you can redistribute it and/or | ||
14 | * modify it under the terms of the GNU General Public License | ||
15 | * as published by the Free Software Foundation; either version 2 | ||
16 | * of the License, or (at your option) any later version. | ||
17 | * | ||
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
19 | * KIND, either express or implied. | ||
20 | * | ||
21 | ****************************************************************************/ | ||
22 | |||
23 | #define lrocklib_c | ||
24 | #define LUA_LIB | ||
25 | |||
26 | #include "lua.h" | ||
27 | |||
28 | #include "lauxlib.h" | ||
29 | #include "rocklib.h" | ||
30 | |||
31 | #define RB_WRAP(M) static int rock_##M(lua_State *L) | ||
32 | |||
33 | RB_WRAP(splash) | ||
34 | { | ||
35 | int ticks = luaL_checkint(L, 1); | ||
36 | const char *s = luaL_checkstring(L, 2); | ||
37 | rb->splash(ticks, s); | ||
38 | return 1; | ||
39 | } | ||
40 | |||
41 | RB_WRAP(lcd_update) | ||
42 | { | ||
43 | (void)L; | ||
44 | rb->lcd_update(); | ||
45 | return 1; | ||
46 | } | ||
47 | |||
48 | RB_WRAP(lcd_clear_display) | ||
49 | { | ||
50 | (void)L; | ||
51 | rb->lcd_clear_display(); | ||
52 | return 1; | ||
53 | } | ||
54 | |||
55 | RB_WRAP(lcd_putsxy) | ||
56 | { | ||
57 | int x = luaL_checkint(L, 1); | ||
58 | int y = luaL_checkint(L, 2); | ||
59 | const char* string = luaL_checkstring(L, 3); | ||
60 | rb->lcd_putsxy(x, y, string); | ||
61 | return 1; | ||
62 | } | ||
63 | |||
64 | RB_WRAP(lcd_puts) | ||
65 | { | ||
66 | int x = luaL_checkint(L, 1); | ||
67 | int y = luaL_checkint(L, 2); | ||
68 | const char* string = luaL_checkstring(L, 3); | ||
69 | rb->lcd_puts(x, y, string); | ||
70 | return 1; | ||
71 | } | ||
72 | |||
73 | RB_WRAP(lcd_puts_scroll) | ||
74 | { | ||
75 | int x = luaL_checkint(L, 1); | ||
76 | int y = luaL_checkint(L, 2); | ||
77 | const char* string = luaL_checkstring(L, 3); | ||
78 | rb->lcd_puts_scroll(x, y, string); | ||
79 | return 1; | ||
80 | } | ||
81 | |||
82 | RB_WRAP(lcd_stop_scroll) | ||
83 | { | ||
84 | (void)L; | ||
85 | rb->lcd_stop_scroll(); | ||
86 | return 1; | ||
87 | } | ||
88 | |||
89 | #ifdef HAVE_LCD_BITMAP | ||
90 | RB_WRAP(lcd_set_drawmode) | ||
91 | { | ||
92 | int drawmode = luaL_checkint(L, 1); | ||
93 | rb->lcd_set_drawmode(drawmode); | ||
94 | return 1; | ||
95 | } | ||
96 | |||
97 | RB_WRAP(lcd_get_drawmode) | ||
98 | { | ||
99 | int result = rb->lcd_get_drawmode(); | ||
100 | lua_pushinteger(L, result); | ||
101 | return 1; | ||
102 | } | ||
103 | |||
104 | RB_WRAP(lcd_setfont) | ||
105 | { | ||
106 | int font = luaL_checkint(L, 1); | ||
107 | rb->lcd_setfont(font); | ||
108 | return 1; | ||
109 | } | ||
110 | |||
111 | RB_WRAP(lcd_drawpixel) | ||
112 | { | ||
113 | int x = luaL_checkint(L, 1); | ||
114 | int y = luaL_checkint(L, 2); | ||
115 | |||
116 | rb->lcd_drawpixel(x, y); | ||
117 | |||
118 | return 1; | ||
119 | } | ||
120 | |||
121 | RB_WRAP(lcd_drawline) | ||
122 | { | ||
123 | int x1 = luaL_checkint(L, 1); | ||
124 | int y1 = luaL_checkint(L, 2); | ||
125 | int x2 = luaL_checkint(L, 3); | ||
126 | int y2 = luaL_checkint(L, 4); | ||
127 | |||
128 | rb->lcd_drawline(x1, y1, x2, y2); | ||
129 | |||
130 | return 1; | ||
131 | } | ||
132 | |||
133 | RB_WRAP(lcd_hline) | ||
134 | { | ||
135 | int x1 = luaL_checkint(L, 1); | ||
136 | int x2 = luaL_checkint(L, 2); | ||
137 | int y = luaL_checkint(L, 3); | ||
138 | |||
139 | rb->lcd_hline(x1, x2, y); | ||
140 | |||
141 | return 1; | ||
142 | } | ||
143 | |||
144 | RB_WRAP(lcd_vline) | ||
145 | { | ||
146 | int x = luaL_checkint(L, 1); | ||
147 | int y1 = luaL_checkint(L, 2); | ||
148 | int y2 = luaL_checkint(L, 3); | ||
149 | |||
150 | rb->lcd_vline(x, y1, y2); | ||
151 | |||
152 | return 1; | ||
153 | } | ||
154 | |||
155 | RB_WRAP(lcd_drawrect) | ||
156 | { | ||
157 | int x = luaL_checkint(L, 1); | ||
158 | int y = luaL_checkint(L, 2); | ||
159 | int width = luaL_checkint(L, 3); | ||
160 | int height = luaL_checkint(L, 4); | ||
161 | |||
162 | rb->lcd_drawrect(x, y, width, height); | ||
163 | |||
164 | return 1; | ||
165 | } | ||
166 | |||
167 | RB_WRAP(lcd_fillrect) | ||
168 | { | ||
169 | int x = luaL_checkint(L, 1); | ||
170 | int y = luaL_checkint(L, 2); | ||
171 | int width = luaL_checkint(L, 3); | ||
172 | int height = luaL_checkint(L, 4); | ||
173 | |||
174 | rb->lcd_fillrect(x, y, width, height); | ||
175 | |||
176 | return 1; | ||
177 | } | ||
178 | #endif | ||
179 | |||
180 | RB_WRAP(yield) | ||
181 | { | ||
182 | (void)L; | ||
183 | rb->yield(); | ||
184 | return 1; | ||
185 | } | ||
186 | |||
187 | RB_WRAP(sleep) | ||
188 | { | ||
189 | int ticks = luaL_checkint(L, 1); | ||
190 | rb->sleep(ticks); | ||
191 | return 1; | ||
192 | } | ||
193 | |||
194 | RB_WRAP(current_tick) | ||
195 | { | ||
196 | lua_pushinteger(L, *rb->current_tick); | ||
197 | return 1; | ||
198 | } | ||
199 | |||
200 | RB_WRAP(button_get) | ||
201 | { | ||
202 | bool block = lua_toboolean(L, 1); | ||
203 | long result = rb->button_get(block); | ||
204 | lua_pushinteger(L, result); | ||
205 | return 1; | ||
206 | } | ||
207 | |||
208 | RB_WRAP(button_get_w_tmo) | ||
209 | { | ||
210 | int ticks = luaL_checkint(L, 1); | ||
211 | long result = rb->button_get_w_tmo(ticks); | ||
212 | lua_pushinteger(L, result); | ||
213 | return 1; | ||
214 | } | ||
215 | |||
216 | RB_WRAP(button_status) | ||
217 | { | ||
218 | int result = rb->button_status(); | ||
219 | lua_pushinteger(L, result); | ||
220 | return 1; | ||
221 | } | ||
222 | |||
223 | #ifdef HAVE_BUTTON_DATA | ||
224 | RB_WRAP(button_get_data) | ||
225 | { | ||
226 | int result = rb->button_get_data(); | ||
227 | lua_pushinteger(L, result); | ||
228 | return 1; | ||
229 | } | ||
230 | #endif | ||
231 | |||
232 | #ifdef HAS_BUTTON_HOLD | ||
233 | RB_WRAP(button_hold) | ||
234 | { | ||
235 | bool result = rb->button_hold(); | ||
236 | lua_pushboolean(L, result); | ||
237 | return 1; | ||
238 | } | ||
239 | #endif | ||
240 | |||
241 | RB_WRAP(get_action) | ||
242 | { | ||
243 | int context = luaL_checkint(L, 1); | ||
244 | int timeout = luaL_checkint(L, 2); | ||
245 | int result = rb->get_action(context, timeout); | ||
246 | lua_pushinteger(L, result); | ||
247 | return 1; | ||
248 | } | ||
249 | |||
250 | RB_WRAP(action_userabort) | ||
251 | { | ||
252 | int timeout = luaL_checkint(L, 1); | ||
253 | bool result = rb->action_userabort(timeout); | ||
254 | lua_pushboolean(L, result); | ||
255 | return 1; | ||
256 | } | ||
257 | |||
258 | RB_WRAP(kbd_input) | ||
259 | { | ||
260 | char* buffer = (char*)luaL_checkstring(L, 1); | ||
261 | int buflen = luaL_checkint(L, 2); | ||
262 | int result = rb->kbd_input(buffer, buflen); | ||
263 | lua_pushinteger(L, result); | ||
264 | return 1; | ||
265 | } | ||
266 | |||
267 | RB_WRAP(backlight_on) | ||
268 | { | ||
269 | (void)L; | ||
270 | rb->backlight_on(); | ||
271 | return 1; | ||
272 | } | ||
273 | |||
274 | RB_WRAP(backlight_off) | ||
275 | { | ||
276 | (void)L; | ||
277 | rb->backlight_off(); | ||
278 | return 1; | ||
279 | } | ||
280 | |||
281 | RB_WRAP(backlight_set_timeout) | ||
282 | { | ||
283 | int val = luaL_checkint(L, 1); | ||
284 | rb->backlight_set_timeout(val); | ||
285 | return 1; | ||
286 | } | ||
287 | |||
288 | #ifdef HAVE_BACKLIGHT_BRIGHTNESS | ||
289 | RB_WRAP(backlight_set_brightness) | ||
290 | { | ||
291 | int val = luaL_checkint(L, 1); | ||
292 | rb->backlight_set_brightness(val); | ||
293 | return 1; | ||
294 | } | ||
295 | #endif | ||
296 | |||
297 | |||
298 | #define R(NAME) {#NAME, rock_##NAME} | ||
299 | static const luaL_Reg rocklib[] = { | ||
300 | /* Graphics */ | ||
301 | R(lcd_clear_display), | ||
302 | R(lcd_update), | ||
303 | R(lcd_puts), | ||
304 | R(lcd_putsxy), | ||
305 | R(lcd_puts_scroll), | ||
306 | R(lcd_stop_scroll), | ||
307 | R(splash), | ||
308 | #ifdef HAVE_LCD_BITMAP | ||
309 | R(lcd_set_drawmode), | ||
310 | R(lcd_get_drawmode), | ||
311 | R(lcd_setfont), | ||
312 | R(lcd_drawline), | ||
313 | R(lcd_drawpixel), | ||
314 | R(lcd_hline), | ||
315 | R(lcd_vline), | ||
316 | R(lcd_drawrect), | ||
317 | R(lcd_fillrect), | ||
318 | #endif | ||
319 | |||
320 | /* Kernel */ | ||
321 | R(sleep), | ||
322 | R(yield), | ||
323 | R(current_tick), | ||
324 | |||
325 | /* Buttons */ | ||
326 | R(button_get), | ||
327 | R(button_get_w_tmo), | ||
328 | R(button_status), | ||
329 | #ifdef HAVE_BUTTON_DATA | ||
330 | R(button_get_data), | ||
331 | #endif | ||
332 | #ifdef HAS_BUTTON_HOLD | ||
333 | R(button_hold), | ||
334 | #endif | ||
335 | R(get_action), | ||
336 | R(action_userabort), | ||
337 | R(kbd_input), | ||
338 | |||
339 | /* Hardware */ | ||
340 | R(backlight_on), | ||
341 | R(backlight_off), | ||
342 | R(backlight_set_timeout), | ||
343 | #ifdef HAVE_BACKLIGHT_BRIGHTNESS | ||
344 | R(backlight_set_brightness), | ||
345 | #endif | ||
346 | |||
347 | {NULL, NULL} | ||
348 | }; | ||
349 | #undef R | ||
350 | |||
351 | #define RB_CONSTANT(x) lua_pushinteger(L, x); lua_setfield(L, -2, #x); | ||
352 | /* | ||
353 | ** Open Rockbox library | ||
354 | */ | ||
355 | LUALIB_API int luaopen_rock(lua_State *L) | ||
356 | { | ||
357 | luaL_register(L, LUA_ROCKLIBNAME, rocklib); | ||
358 | RB_CONSTANT(HZ); | ||
359 | RB_CONSTANT(LCD_WIDTH); | ||
360 | RB_CONSTANT(LCD_HEIGHT); | ||
361 | |||
362 | return 1; | ||
363 | } | ||
364 | |||
diff --git a/apps/plugins/lua/rocklib.h b/apps/plugins/lua/rocklib.h new file mode 100644 index 0000000000..b5817f2f57 --- /dev/null +++ b/apps/plugins/lua/rocklib.h | |||
@@ -0,0 +1,29 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #ifndef _ROCKLIB_H_ | ||
23 | #define _ROCKLIB_H_ | ||
24 | |||
25 | #define LUA_ROCKLIBNAME "rb" | ||
26 | LUALIB_API int (luaopen_rock) (lua_State *L); | ||
27 | |||
28 | #endif /* _ROCKLIB_H_ */ | ||
29 | |||
diff --git a/apps/plugins/lua/rocklibc.h b/apps/plugins/lua/rocklibc.h new file mode 100644 index 0000000000..78b83a6c18 --- /dev/null +++ b/apps/plugins/lua/rocklibc.h | |||
@@ -0,0 +1,45 @@ | |||
1 | |||
2 | /*************************************************************************** | ||
3 | * __________ __ ___. | ||
4 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
5 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
6 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
7 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
8 | * \/ \/ \/ \/ \/ | ||
9 | * $Id$ | ||
10 | * | ||
11 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
12 | * | ||
13 | * This program is free software; you can redistribute it and/or | ||
14 | * modify it under the terms of the GNU General Public License | ||
15 | * as published by the Free Software Foundation; either version 2 | ||
16 | * of the License, or (at your option) any later version. | ||
17 | * | ||
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
19 | * KIND, either express or implied. | ||
20 | * | ||
21 | ****************************************************************************/ | ||
22 | |||
23 | #ifndef _ROCKLIBC_H_ | ||
24 | #define _ROCKLIBC_H_ | ||
25 | |||
26 | #include <ctype.h> | ||
27 | #include "plugin.h" | ||
28 | |||
29 | #ifdef SIMULATOR | ||
30 | #include <errno.h> | ||
31 | #else | ||
32 | extern int errno; | ||
33 | #define EINVAL 22 /* Invalid argument */ | ||
34 | #define ERANGE 34 /* Math result not representable */ | ||
35 | #endif | ||
36 | |||
37 | #define __likely LIKELY | ||
38 | #define __unlikely UNLIKELY | ||
39 | |||
40 | /* Simple substitutions */ | ||
41 | #define memcmp rb->memcmp | ||
42 | #define strlen rb->strlen | ||
43 | |||
44 | #endif /* _ROCKLIBC_H_ */ | ||
45 | |||
diff --git a/apps/plugins/lua/rocklua.c b/apps/plugins/lua/rocklua.c new file mode 100644 index 0000000000..4bb89ae29b --- /dev/null +++ b/apps/plugins/lua/rocklua.c | |||
@@ -0,0 +1,105 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "plugin.h" | ||
23 | #include "lib/pluginlib_exit.h" | ||
24 | #include "lua.h" | ||
25 | #include "lauxlib.h" | ||
26 | #include "lualib.h" | ||
27 | #include "rocklib.h" | ||
28 | #include "rockmalloc.h" | ||
29 | |||
30 | PLUGIN_HEADER | ||
31 | |||
32 | static const luaL_Reg lualibs[] = { | ||
33 | {"", luaopen_base}, | ||
34 | {LUA_TABLIBNAME, luaopen_table}, | ||
35 | {LUA_STRLIBNAME, luaopen_string}, | ||
36 | {LUA_ROCKLIBNAME, luaopen_rock}, | ||
37 | {NULL, NULL} | ||
38 | }; | ||
39 | |||
40 | static void rocklua_openlibs(lua_State *L) { | ||
41 | const luaL_Reg *lib = lualibs; | ||
42 | for (; lib->func; lib++) { | ||
43 | lua_pushcfunction(L, lib->func); | ||
44 | lua_pushstring(L, lib->name); | ||
45 | lua_call(L, 1, 0); | ||
46 | } | ||
47 | } | ||
48 | |||
49 | char curpath[MAX_PATH]; | ||
50 | static void fill_curpath(const char* filename) | ||
51 | { | ||
52 | char* pos = rb->strrchr(filename, '/'); | ||
53 | |||
54 | if(pos != NULL) | ||
55 | { | ||
56 | int len = (int)(pos - filename); | ||
57 | |||
58 | if(len > 0) | ||
59 | memcpy(curpath, filename, len); | ||
60 | |||
61 | curpath[len] = '\0'; | ||
62 | } | ||
63 | } | ||
64 | |||
65 | |||
66 | /***************** Plugin Entry Point *****************/ | ||
67 | enum plugin_status plugin_start(const void* parameter) | ||
68 | { | ||
69 | const char* filename; | ||
70 | int status; | ||
71 | |||
72 | PLUGINLIB_EXIT_INIT | ||
73 | |||
74 | if (parameter == NULL) | ||
75 | { | ||
76 | rb->splash(HZ, "Play a .lua file!"); | ||
77 | return PLUGIN_ERROR; | ||
78 | } | ||
79 | else | ||
80 | { | ||
81 | filename = (char*) parameter; | ||
82 | fill_curpath(filename); | ||
83 | |||
84 | lua_State *L = luaL_newstate(); | ||
85 | |||
86 | rocklua_openlibs(L); | ||
87 | status = luaL_loadfile(L, filename); | ||
88 | if (!status) { | ||
89 | rb->lcd_clear_display(); | ||
90 | status = lua_pcall(L, 0, 0, 0); | ||
91 | } | ||
92 | |||
93 | dlmalloc_stats(); | ||
94 | |||
95 | if (status) { | ||
96 | rb->splashf(5 * HZ, "%s", lua_tostring(L, -1)); | ||
97 | lua_pop(L, 1); | ||
98 | } | ||
99 | |||
100 | lua_close(L); | ||
101 | } | ||
102 | |||
103 | return PLUGIN_OK; | ||
104 | } | ||
105 | |||
diff --git a/apps/plugins/lua/rockmalloc.c b/apps/plugins/lua/rockmalloc.c new file mode 100644 index 0000000000..14a43396ea --- /dev/null +++ b/apps/plugins/lua/rockmalloc.c | |||
@@ -0,0 +1,63 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "plugin.h" | ||
23 | #include "rockmalloc.h" | ||
24 | #include "malloc.c" | ||
25 | |||
26 | void *rocklua_morecore(int size) | ||
27 | { | ||
28 | static char *sbrk_top = NULL; | ||
29 | static ssize_t total_size = 0; | ||
30 | void *ptr = 0; | ||
31 | |||
32 | if (size > 0) { | ||
33 | size = size + 4 - (size % 4); | ||
34 | |||
35 | if (sbrk_top == NULL) { | ||
36 | sbrk_top = rb->plugin_get_buffer((size_t *) &total_size); | ||
37 | } | ||
38 | |||
39 | if (sbrk_top == NULL || size + 4 > abs(total_size)) { | ||
40 | /* Try the audio buffer */ | ||
41 | sbrk_top = rb->plugin_get_audio_buffer((size_t *) &total_size); | ||
42 | |||
43 | if(sbrk_top == NULL || size + 4 > abs(total_size)) { | ||
44 | printf("malloc failed for %d!\n", size); | ||
45 | return (void *) MFAIL; | ||
46 | } | ||
47 | } | ||
48 | |||
49 | ptr = sbrk_top + 4; | ||
50 | *((unsigned int *) sbrk_top) = size; | ||
51 | |||
52 | sbrk_top += size + 4; | ||
53 | total_size -= size + 4; | ||
54 | |||
55 | return ptr; | ||
56 | } else if (size < 0) { | ||
57 | /* we don't currently support shrink behavior */ | ||
58 | return (void *) MFAIL; | ||
59 | } else { | ||
60 | return sbrk_top; | ||
61 | } | ||
62 | } | ||
63 | |||
diff --git a/apps/plugins/lua/rockmalloc.h b/apps/plugins/lua/rockmalloc.h new file mode 100644 index 0000000000..46a943f59e --- /dev/null +++ b/apps/plugins/lua/rockmalloc.h | |||
@@ -0,0 +1,46 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dan Everton (safetydan) | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #ifndef _ROCKMALLOC_H_ | ||
23 | #define _ROCKMALLOC_H_ | ||
24 | |||
25 | #undef WIN32 | ||
26 | #undef _WIN32 | ||
27 | #define LACKS_UNISTD_H | ||
28 | #define LACKS_SYS_PARAM_H | ||
29 | #define LACKS_SYS_MMAN_H | ||
30 | #define LACKS_STRINGS_H | ||
31 | #define INSECURE 1 | ||
32 | #define USE_DL_PREFIX 1 | ||
33 | #define MORECORE_CANNOT_TRIM 1 | ||
34 | #define HAVE_MMAP 0 | ||
35 | #define HAVE_MREMAP 0 | ||
36 | #define NO_MALLINFO 1 | ||
37 | #define ABORT ((void) 0) | ||
38 | #define DEBUG 0 | ||
39 | #define MORECORE rocklua_morecore | ||
40 | |||
41 | void *rocklua_morecore(int size); | ||
42 | void dlmalloc_stats(void); | ||
43 | |||
44 | #define printf DEBUGF | ||
45 | |||
46 | #endif | ||
diff --git a/apps/plugins/lua/strcspn.c b/apps/plugins/lua/strcspn.c new file mode 100644 index 0000000000..7af6f693eb --- /dev/null +++ b/apps/plugins/lua/strcspn.c | |||
@@ -0,0 +1,16 @@ | |||
1 | #include "rocklibc.h" | ||
2 | |||
3 | size_t strcspn(const char *s, const char *reject) | ||
4 | { | ||
5 | size_t l=0; | ||
6 | int a=1,i,al=strlen(reject); | ||
7 | |||
8 | while((a)&&(*s)) | ||
9 | { | ||
10 | for(i=0;(a)&&(i<al);i++) | ||
11 | if (*s==reject[i]) a=0; | ||
12 | if (a) l++; | ||
13 | s++; | ||
14 | } | ||
15 | return l; | ||
16 | } | ||
diff --git a/apps/plugins/lua/strncat.c b/apps/plugins/lua/strncat.c new file mode 100644 index 0000000000..5b15ff07b1 --- /dev/null +++ b/apps/plugins/lua/strncat.c | |||
@@ -0,0 +1,21 @@ | |||
1 | #include "rocklibc.h" | ||
2 | |||
3 | /* gcc is broken and has a non-SUSv2 compliant internal prototype. | ||
4 | * This causes it to warn about a type mismatch here. Ignore it. */ | ||
5 | char *strncat(char *s, const char *t, size_t n) { | ||
6 | char *dest=s; | ||
7 | register char *max; | ||
8 | s+=strlen(s); | ||
9 | if (__unlikely((max=s+n)==s)) goto fini; | ||
10 | for (;;) { | ||
11 | if (__unlikely(!(*s = *t))) break; if (__unlikely(++s==max)) break; ++t; | ||
12 | #ifndef WANT_SMALL_STRING_ROUTINES | ||
13 | if (__unlikely(!(*s = *t))) break; if (__unlikely(++s==max)) break; ++t; | ||
14 | if (__unlikely(!(*s = *t))) break; if (__unlikely(++s==max)) break; ++t; | ||
15 | if (__unlikely(!(*s = *t))) break; if (__unlikely(++s==max)) break; ++t; | ||
16 | #endif | ||
17 | } | ||
18 | *s=0; | ||
19 | fini: | ||
20 | return dest; | ||
21 | } | ||
diff --git a/apps/plugins/lua/strpbrk.c b/apps/plugins/lua/strpbrk.c new file mode 100644 index 0000000000..f416f391ae --- /dev/null +++ b/apps/plugins/lua/strpbrk.c | |||
@@ -0,0 +1,10 @@ | |||
1 | #include "rocklibc.h" | ||
2 | |||
3 | char *strpbrk(const char *s, const char *accept) { | ||
4 | register int i,l=strlen(accept); | ||
5 | for (; *s; s++) | ||
6 | for (i=0; i<l; i++) | ||
7 | if (*s == accept[i]) | ||
8 | return (char*)s; | ||
9 | return 0; | ||
10 | } | ||
diff --git a/apps/plugins/lua/strstr.c b/apps/plugins/lua/strstr.c new file mode 100644 index 0000000000..2db47f4adf --- /dev/null +++ b/apps/plugins/lua/strstr.c | |||
@@ -0,0 +1,16 @@ | |||
1 | #include "rocklibc.h" | ||
2 | |||
3 | char *strstr(const char *haystack, const char *needle) { | ||
4 | size_t nl=strlen(needle); | ||
5 | size_t hl=strlen(haystack); | ||
6 | int i; | ||
7 | if (!nl) goto found; | ||
8 | if (nl>hl) return 0; | ||
9 | for (i=hl-nl+1; __likely(i); --i) { | ||
10 | if (*haystack==*needle && !memcmp(haystack,needle,nl)) | ||
11 | found: | ||
12 | return (char*)haystack; | ||
13 | ++haystack; | ||
14 | } | ||
15 | return 0; | ||
16 | } | ||
diff --git a/apps/plugins/lua/strtol.c b/apps/plugins/lua/strtol.c new file mode 100644 index 0000000000..184951b844 --- /dev/null +++ b/apps/plugins/lua/strtol.c | |||
@@ -0,0 +1,27 @@ | |||
1 | #include "rocklibc.h" | ||
2 | |||
3 | extern unsigned long int strtoul(const char *ptr, char **endptr, int base); | ||
4 | |||
5 | #define ABS_LONG_MIN 2147483648UL | ||
6 | long int strtol(const char *nptr, char **endptr, int base) | ||
7 | { | ||
8 | int neg=0; | ||
9 | unsigned long int v; | ||
10 | const char*orig=nptr; | ||
11 | |||
12 | while(isspace(*nptr)) nptr++; | ||
13 | |||
14 | if (*nptr == '-' && isalnum(nptr[1])) { neg=-1; ++nptr; } | ||
15 | v=strtoul(nptr,endptr,base); | ||
16 | if (endptr && *endptr==nptr) *endptr=(char *)orig; | ||
17 | if (v>=ABS_LONG_MIN) { | ||
18 | if (v==ABS_LONG_MIN && neg) { | ||
19 | errno=0; | ||
20 | return v; | ||
21 | } | ||
22 | errno=ERANGE; | ||
23 | return (neg?LONG_MIN:LONG_MAX); | ||
24 | } | ||
25 | return (neg?-v:v); | ||
26 | } | ||
27 | |||
diff --git a/apps/plugins/lua/strtoul.c b/apps/plugins/lua/strtoul.c new file mode 100644 index 0000000000..74d9b4bb09 --- /dev/null +++ b/apps/plugins/lua/strtoul.c | |||
@@ -0,0 +1,53 @@ | |||
1 | #include "rocklibc.h" | ||
2 | |||
3 | unsigned long int strtoul(const char *ptr, char **endptr, int base) | ||
4 | { | ||
5 | int neg = 0, overflow = 0; | ||
6 | unsigned long int v=0; | ||
7 | const char* orig; | ||
8 | const char* nptr=ptr; | ||
9 | |||
10 | while(isspace(*nptr)) ++nptr; | ||
11 | |||
12 | if (*nptr == '-') { neg=1; nptr++; } | ||
13 | else if (*nptr == '+') ++nptr; | ||
14 | orig=nptr; | ||
15 | if (base==16 && nptr[0]=='0') goto skip0x; | ||
16 | if (base) { | ||
17 | register unsigned int b=base-2; | ||
18 | if (__unlikely(b>34)) { errno=EINVAL; return 0; } | ||
19 | } else { | ||
20 | if (*nptr=='0') { | ||
21 | base=8; | ||
22 | skip0x: | ||
23 | if ((nptr[1]=='x'||nptr[1]=='X') && isxdigit(nptr[2])) { | ||
24 | nptr+=2; | ||
25 | base=16; | ||
26 | } | ||
27 | } else | ||
28 | base=10; | ||
29 | } | ||
30 | while(__likely(*nptr)) { | ||
31 | register unsigned char c=*nptr; | ||
32 | c=(c>='a'?c-'a'+10:c>='A'?c-'A'+10:c<='9'?c-'0':0xff); | ||
33 | if (__unlikely(c>=base)) break; /* out of base */ | ||
34 | { | ||
35 | register unsigned long x=(v&0xff)*base+c; | ||
36 | register unsigned long w=(v>>8)*base+(x>>8); | ||
37 | if (w>(ULONG_MAX>>8)) overflow=1; | ||
38 | v=(w<<8)+(x&0xff); | ||
39 | } | ||
40 | ++nptr; | ||
41 | } | ||
42 | if (__unlikely(nptr==orig)) { /* no conversion done */ | ||
43 | nptr=ptr; | ||
44 | errno=EINVAL; | ||
45 | v=0; | ||
46 | } | ||
47 | if (endptr) *endptr=(char *)nptr; | ||
48 | if (overflow) { | ||
49 | errno=ERANGE; | ||
50 | return ULONG_MAX; | ||
51 | } | ||
52 | return (neg?-v:v); | ||
53 | } | ||
diff --git a/apps/plugins/viewers.config b/apps/plugins/viewers.config index 939a0a5534..fdb700f69d 100644 --- a/apps/plugins/viewers.config +++ b/apps/plugins/viewers.config | |||
@@ -55,3 +55,4 @@ cells,games/rocklife,- | |||
55 | link,viewers/shortcuts_view,- | 55 | link,viewers/shortcuts_view,- |
56 | *,viewers/shortcuts_append,- | 56 | *,viewers/shortcuts_append,- |
57 | *,apps/md5sum,- | 57 | *,apps/md5sum,- |
58 | lua,viewers/lua,- | ||