diff options
Diffstat (limited to 'apps/plugins/lua/lobject.c')
-rw-r--r-- | apps/plugins/lua/lobject.c | 250 |
1 files changed, 162 insertions, 88 deletions
diff --git a/apps/plugins/lua/lobject.c b/apps/plugins/lua/lobject.c index 62ad8e9359..34bbb25c9a 100644 --- a/apps/plugins/lua/lobject.c +++ b/apps/plugins/lua/lobject.c | |||
@@ -1,5 +1,5 @@ | |||
1 | /* | 1 | /* |
2 | ** $Id: lobject.c,v 2.22.1.1 2007/12/27 13:02:25 roberto Exp $ | 2 | ** $Id: lobject.c,v 2.58.1.1 2013/04/12 18:48:47 roberto Exp $ |
3 | ** Some generic functions over Lua objects | 3 | ** Some generic functions over Lua objects |
4 | ** See Copyright Notice in lua.h | 4 | ** See Copyright Notice in lua.h |
5 | */ | 5 | */ |
@@ -15,6 +15,8 @@ | |||
15 | 15 | ||
16 | #include "lua.h" | 16 | #include "lua.h" |
17 | 17 | ||
18 | #include "lctype.h" | ||
19 | #include "ldebug.h" | ||
18 | #include "ldo.h" | 20 | #include "ldo.h" |
19 | #include "lmem.h" | 21 | #include "lmem.h" |
20 | #include "lobject.h" | 22 | #include "lobject.h" |
@@ -24,7 +26,7 @@ | |||
24 | 26 | ||
25 | 27 | ||
26 | 28 | ||
27 | const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL}; | 29 | LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT}; |
28 | 30 | ||
29 | 31 | ||
30 | /* | 32 | /* |
@@ -33,25 +35,25 @@ const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL}; | |||
33 | ** eeeee != 0 and (xxx) otherwise. | 35 | ** eeeee != 0 and (xxx) otherwise. |
34 | */ | 36 | */ |
35 | int luaO_int2fb (unsigned int x) { | 37 | int luaO_int2fb (unsigned int x) { |
36 | int e = 0; /* expoent */ | 38 | int e = 0; /* exponent */ |
37 | while (x >= 16) { | 39 | if (x < 8) return x; |
40 | while (x >= 0x10) { | ||
38 | x = (x+1) >> 1; | 41 | x = (x+1) >> 1; |
39 | e++; | 42 | e++; |
40 | } | 43 | } |
41 | if (x < 8) return x; | 44 | return ((e+1) << 3) | (cast_int(x) - 8); |
42 | else return ((e+1) << 3) | (cast_int(x) - 8); | ||
43 | } | 45 | } |
44 | 46 | ||
45 | 47 | ||
46 | /* converts back */ | 48 | /* converts back */ |
47 | int luaO_fb2int (int x) { | 49 | int luaO_fb2int (int x) { |
48 | int e = (x >> 3) & 31; | 50 | int e = (x >> 3) & 0x1f; |
49 | if (e == 0) return x; | 51 | if (e == 0) return x; |
50 | else return ((x & 7)+8) << (e - 1); | 52 | else return ((x & 7) + 8) << (e - 1); |
51 | } | 53 | } |
52 | 54 | ||
53 | 55 | ||
54 | int luaO_log2 (unsigned int x) { | 56 | int luaO_ceillog2 (unsigned int x) { |
55 | static const lu_byte log_2[256] = { | 57 | 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, | 58 | 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, | 59 | 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, |
@@ -62,109 +64,169 @@ int luaO_log2 (unsigned int x) { | |||
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, | 64 | 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 | 65 | 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 | }; | 66 | }; |
65 | int l = -1; | 67 | int l = 0; |
68 | x--; | ||
66 | while (x >= 256) { l += 8; x >>= 8; } | 69 | while (x >= 256) { l += 8; x >>= 8; } |
67 | return l + log_2[x]; | 70 | return l + log_2[x]; |
71 | } | ||
72 | |||
73 | |||
74 | lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) { | ||
75 | switch (op) { | ||
76 | case LUA_OPADD: return luai_numadd(NULL, v1, v2); | ||
77 | case LUA_OPSUB: return luai_numsub(NULL, v1, v2); | ||
78 | case LUA_OPMUL: return luai_nummul(NULL, v1, v2); | ||
79 | case LUA_OPDIV: return luai_numdiv(NULL, v1, v2); | ||
80 | case LUA_OPMOD: return luai_nummod(NULL, v1, v2); | ||
81 | case LUA_OPPOW: return luai_numpow(NULL, v1, v2); | ||
82 | case LUA_OPUNM: return luai_numunm(NULL, v1); | ||
83 | default: lua_assert(0); return 0; | ||
84 | } | ||
85 | } | ||
86 | |||
87 | |||
88 | int luaO_hexavalue (int c) { | ||
89 | if (lisdigit(c)) return c - '0'; | ||
90 | else return ltolower(c) - 'a' + 10; | ||
91 | } | ||
92 | |||
93 | |||
94 | #if !defined(lua_strx2number) | ||
95 | |||
96 | #include <math.h> | ||
97 | |||
98 | |||
99 | static int isneg (const char **s) { | ||
100 | if (**s == '-') { (*s)++; return 1; } | ||
101 | else if (**s == '+') (*s)++; | ||
102 | return 0; | ||
103 | } | ||
68 | 104 | ||
105 | |||
106 | static lua_Number readhexa (const char **s, lua_Number r, int *count) { | ||
107 | for (; lisxdigit(cast_uchar(**s)); (*s)++) { /* read integer part */ | ||
108 | r = (r * cast_num(16.0)) + cast_num(luaO_hexavalue(cast_uchar(**s))); | ||
109 | (*count)++; | ||
110 | } | ||
111 | return r; | ||
69 | } | 112 | } |
70 | 113 | ||
71 | 114 | ||
72 | int luaO_rawequalObj (const TValue *t1, const TValue *t2) { | 115 | /* |
73 | if (ttype(t1) != ttype(t2)) return 0; | 116 | ** convert an hexadecimal numeric string to a number, following |
74 | else switch (ttype(t1)) { | 117 | ** C99 specification for 'strtod' |
75 | case LUA_TNIL: | 118 | */ |
76 | return 1; | 119 | static lua_Number lua_strx2number (const char *s, char **endptr) { |
77 | case LUA_TNUMBER: | 120 | lua_Number r = 0.0; |
78 | return luai_numeq(nvalue(t1), nvalue(t2)); | 121 | int e = 0, i = 0; |
79 | case LUA_TBOOLEAN: | 122 | int neg = 0; /* 1 if number is negative */ |
80 | return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */ | 123 | *endptr = cast(char *, s); /* nothing is valid yet */ |
81 | case LUA_TLIGHTUSERDATA: | 124 | while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */ |
82 | return pvalue(t1) == pvalue(t2); | 125 | neg = isneg(&s); /* check signal */ |
83 | default: | 126 | if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */ |
84 | lua_assert(iscollectable(t1)); | 127 | return 0.0; /* invalid format (no '0x') */ |
85 | return gcvalue(t1) == gcvalue(t2); | 128 | s += 2; /* skip '0x' */ |
129 | r = readhexa(&s, r, &i); /* read integer part */ | ||
130 | if (*s == '.') { | ||
131 | s++; /* skip dot */ | ||
132 | r = readhexa(&s, r, &e); /* read fractional part */ | ||
86 | } | 133 | } |
134 | if (i == 0 && e == 0) | ||
135 | return 0.0; /* invalid format (no digit) */ | ||
136 | e *= -4; /* each fractional digit divides value by 2^-4 */ | ||
137 | *endptr = cast(char *, s); /* valid up to here */ | ||
138 | if (*s == 'p' || *s == 'P') { /* exponent part? */ | ||
139 | int exp1 = 0; | ||
140 | int neg1; | ||
141 | s++; /* skip 'p' */ | ||
142 | neg1 = isneg(&s); /* signal */ | ||
143 | if (!lisdigit(cast_uchar(*s))) | ||
144 | goto ret; /* must have at least one digit */ | ||
145 | while (lisdigit(cast_uchar(*s))) /* read exponent */ | ||
146 | exp1 = exp1 * 10 + *(s++) - '0'; | ||
147 | if (neg1) exp1 = -exp1; | ||
148 | e += exp1; | ||
149 | } | ||
150 | *endptr = cast(char *, s); /* valid up to here */ | ||
151 | ret: | ||
152 | if (neg) r = -r; | ||
153 | return l_mathop(ldexp)(r, e); | ||
87 | } | 154 | } |
88 | 155 | ||
156 | #endif | ||
157 | |||
89 | 158 | ||
90 | int luaO_str2d (const char *s, lua_Number *result) { | 159 | int luaO_str2d (const char *s, size_t len, lua_Number *result) { |
91 | char *endptr; | 160 | char *endptr; |
92 | *result = lua_str2number(s, &endptr); | 161 | if (strpbrk(s, "nN")) /* reject 'inf' and 'nan' */ |
93 | if (endptr == s) return 0; /* conversion failed */ | 162 | return 0; |
94 | if (*endptr == 'x' || *endptr == 'X') /* maybe an hexadecimal constant? */ | 163 | else if (strpbrk(s, "xX")) /* hexa? */ |
95 | *result = cast_num(strtoul(s, &endptr, 16)); | 164 | *result = lua_strx2number(s, &endptr); |
96 | if (*endptr == '\0') return 1; /* most common case */ | 165 | else |
97 | while (isspace(cast(unsigned char, *endptr))) endptr++; | 166 | *result = lua_str2number(s, &endptr); |
98 | if (*endptr != '\0') return 0; /* invalid trailing characters? */ | 167 | if (endptr == s) return 0; /* nothing recognized */ |
99 | return 1; | 168 | while (lisspace(cast_uchar(*endptr))) endptr++; |
169 | return (endptr == s + len); /* OK if no trailing characters */ | ||
100 | } | 170 | } |
101 | 171 | ||
102 | 172 | ||
103 | 173 | ||
104 | static void pushstr (lua_State *L, const char *str) { | 174 | static void pushstr (lua_State *L, const char *str, size_t l) { |
105 | setsvalue2s(L, L->top, luaS_new(L, str)); | 175 | setsvalue2s(L, L->top++, luaS_newlstr(L, str, l)); |
106 | incr_top(L); | ||
107 | } | 176 | } |
108 | 177 | ||
109 | 178 | ||
110 | /* this function handles only `%d', `%c', %f, %p, and `%s' formats */ | 179 | /* 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) { | 180 | const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { |
112 | int n = 1; | 181 | int n = 0; |
113 | pushstr(L, ""); | ||
114 | for (;;) { | 182 | for (;;) { |
115 | const char *e = strchr(fmt, '%'); | 183 | const char *e = strchr(fmt, '%'); |
116 | if (e == NULL) break; | 184 | if (e == NULL) break; |
117 | setsvalue2s(L, L->top, luaS_newlstr(L, fmt, e-fmt)); | 185 | luaD_checkstack(L, 2); /* fmt + item */ |
118 | incr_top(L); | 186 | pushstr(L, fmt, e - fmt); |
119 | switch (*(e+1)) { | 187 | switch (*(e+1)) { |
120 | case 's': { | 188 | case 's': { |
121 | const char *s = va_arg(argp, char *); | 189 | const char *s = va_arg(argp, char *); |
122 | if (s == NULL) s = "(null)"; | 190 | if (s == NULL) s = "(null)"; |
123 | pushstr(L, s); | 191 | pushstr(L, s, strlen(s)); |
124 | break; | 192 | break; |
125 | } | 193 | } |
126 | case 'c': { | 194 | case 'c': { |
127 | char buff[2]; | 195 | char buff; |
128 | buff[0] = cast(char, va_arg(argp, int)); | 196 | buff = cast(char, va_arg(argp, int)); |
129 | buff[1] = '\0'; | 197 | pushstr(L, &buff, 1); |
130 | pushstr(L, buff); | ||
131 | break; | 198 | break; |
132 | } | 199 | } |
133 | case 'd': { | 200 | case 'd': { |
134 | setnvalue(L->top, cast_num(va_arg(argp, int))); | 201 | setnvalue(L->top++, cast_num(va_arg(argp, int))); |
135 | incr_top(L); | ||
136 | break; | 202 | break; |
137 | } | 203 | } |
138 | case 'f': { | 204 | case 'f': { |
139 | setnvalue(L->top, cast_num(va_arg(argp, l_uacNumber))); | 205 | setnvalue(L->top++, cast_num(va_arg(argp, l_uacNumber))); |
140 | incr_top(L); | ||
141 | break; | 206 | break; |
142 | } | 207 | } |
143 | case 'p': { | 208 | case 'p': { |
144 | char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */ | 209 | 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 *)); | 210 | int l = snprintf(buff, sizeof(buff), "%p", va_arg(argp, void *)); |
146 | pushstr(L, buff); | 211 | pushstr(L, buff, l); |
147 | break; | 212 | break; |
148 | } | 213 | } |
149 | case '%': { | 214 | case '%': { |
150 | pushstr(L, "%"); | 215 | pushstr(L, "%", 1); |
151 | break; | 216 | break; |
152 | } | 217 | } |
153 | default: { | 218 | default: { |
154 | char buff[3]; | 219 | luaG_runerror(L, |
155 | buff[0] = '%'; | 220 | "invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"), |
156 | buff[1] = *(e+1); | 221 | *(e + 1)); |
157 | buff[2] = '\0'; | ||
158 | pushstr(L, buff); | ||
159 | break; | ||
160 | } | 222 | } |
161 | } | 223 | } |
162 | n += 2; | 224 | n += 2; |
163 | fmt = e+2; | 225 | fmt = e+2; |
164 | } | 226 | } |
165 | pushstr(L, fmt); | 227 | luaD_checkstack(L, 1); |
166 | luaV_concat(L, n+1, cast_int(L->top - L->base) - 1); | 228 | pushstr(L, fmt, strlen(fmt)); |
167 | L->top -= n; | 229 | if (n > 0) luaV_concat(L, n + 1); |
168 | return svalue(L->top - 1); | 230 | return svalue(L->top - 1); |
169 | } | 231 | } |
170 | 232 | ||
@@ -179,36 +241,48 @@ const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) { | |||
179 | } | 241 | } |
180 | 242 | ||
181 | 243 | ||
244 | /* number of chars of a literal string without the ending \0 */ | ||
245 | #define LL(x) (sizeof(x)/sizeof(char) - 1) | ||
246 | |||
247 | #define RETS "..." | ||
248 | #define PRE "[string \"" | ||
249 | #define POS "\"]" | ||
250 | |||
251 | #define addstr(a,b,l) ( memcpy(a,b,(l) * sizeof(char)), a += (l) ) | ||
252 | |||
182 | void luaO_chunkid (char *out, const char *source, size_t bufflen) { | 253 | void luaO_chunkid (char *out, const char *source, size_t bufflen) { |
183 | if (*source == '=') { | 254 | size_t l = strlen(source); |
184 | strncpy(out, source+1, bufflen); /* remove first char */ | 255 | if (*source == '=') { /* 'literal' source */ |
185 | out[bufflen-1] = '\0'; /* ensures null termination */ | 256 | if (l <= bufflen) /* small enough? */ |
257 | memcpy(out, source + 1, l * sizeof(char)); | ||
258 | else { /* truncate it */ | ||
259 | addstr(out, source + 1, bufflen - 1); | ||
260 | *out = '\0'; | ||
261 | } | ||
186 | } | 262 | } |
187 | else { /* out = "source", or "...source" */ | 263 | else if (*source == '@') { /* file name */ |
188 | if (*source == '@') { | 264 | if (l <= bufflen) /* small enough? */ |
189 | size_t l; | 265 | memcpy(out, source + 1, l * sizeof(char)); |
190 | source++; /* skip the `@' */ | 266 | else { /* add '...' before rest of name */ |
191 | bufflen -= sizeof(" '...' "); | 267 | addstr(out, RETS, LL(RETS)); |
192 | l = strlen(source); | 268 | bufflen -= LL(RETS); |
193 | strcpy(out, ""); | 269 | memcpy(out, source + 1 + l - bufflen, bufflen * sizeof(char)); |
194 | if (l > bufflen) { | ||
195 | source += (l-bufflen); /* get last part of file name */ | ||
196 | strcat(out, "..."); | ||
197 | } | ||
198 | strcat(out, source); | ||
199 | } | 270 | } |
200 | else { /* out = [string "string"] */ | 271 | } |
201 | size_t len = strcspn(source, "\n\r"); /* stop at first newline */ | 272 | else { /* string; format as [string "source"] */ |
202 | bufflen -= sizeof(" [string \"...\"] "); | 273 | const char *nl = strchr(source, '\n'); /* find first new line (if any) */ |
203 | if (len > bufflen) len = bufflen; | 274 | addstr(out, PRE, LL(PRE)); /* add prefix */ |
204 | strcpy(out, "[string \""); | 275 | bufflen -= LL(PRE RETS POS) + 1; /* save space for prefix+suffix+'\0' */ |
205 | if (source[len] != '\0') { /* must truncate? */ | 276 | if (l < bufflen && nl == NULL) { /* small one-line source? */ |
206 | strncat(out, source, len); | 277 | addstr(out, source, l); /* keep it */ |
207 | strcat(out, "..."); | ||
208 | } | ||
209 | else | ||
210 | strcat(out, source); | ||
211 | strcat(out, "\"]"); | ||
212 | } | 278 | } |
279 | else { | ||
280 | if (nl != NULL) l = nl - source; /* stop at first newline */ | ||
281 | if (l > bufflen) l = bufflen; | ||
282 | addstr(out, source, l); | ||
283 | addstr(out, RETS, LL(RETS)); | ||
284 | } | ||
285 | memcpy(out, POS, (LL(POS) + 1) * sizeof(char)); | ||
213 | } | 286 | } |
214 | } | 287 | } |
288 | |||