diff options
Diffstat (limited to 'apps/plugins/lua/lparser.h')
-rw-r--r-- | apps/plugins/lua/lparser.h | 75 |
1 files changed, 56 insertions, 19 deletions
diff --git a/apps/plugins/lua/lparser.h b/apps/plugins/lua/lparser.h index f9b8e24913..0346e3c41a 100644 --- a/apps/plugins/lua/lparser.h +++ b/apps/plugins/lua/lparser.h | |||
@@ -1,5 +1,5 @@ | |||
1 | /* | 1 | /* |
2 | ** $Id$ | 2 | ** $Id: lparser.h,v 1.70.1.1 2013/04/12 18:48:47 roberto Exp $ |
3 | ** Lua Parser | 3 | ** Lua Parser |
4 | ** See Copyright Notice in lua.h | 4 | ** See Copyright Notice in lua.h |
5 | */ | 5 | */ |
@@ -23,34 +23,72 @@ typedef enum { | |||
23 | VFALSE, | 23 | VFALSE, |
24 | VK, /* info = index of constant in `k' */ | 24 | VK, /* info = index of constant in `k' */ |
25 | VKNUM, /* nval = numerical value */ | 25 | VKNUM, /* nval = numerical value */ |
26 | VNONRELOC, /* info = result register */ | ||
26 | VLOCAL, /* info = local register */ | 27 | VLOCAL, /* info = local register */ |
27 | VUPVAL, /* info = index of upvalue in `upvalues' */ | 28 | VUPVAL, /* info = index of upvalue in 'upvalues' */ |
28 | VGLOBAL, /* info = index of table; aux = index of global name in `k' */ | 29 | VINDEXED, /* t = table register/upvalue; idx = index R/K */ |
29 | VINDEXED, /* info = table register; aux = index register (or `k') */ | ||
30 | VJMP, /* info = instruction pc */ | 30 | VJMP, /* info = instruction pc */ |
31 | VRELOCABLE, /* info = instruction pc */ | 31 | VRELOCABLE, /* info = instruction pc */ |
32 | VNONRELOC, /* info = result register */ | ||
33 | VCALL, /* info = instruction pc */ | 32 | VCALL, /* info = instruction pc */ |
34 | VVARARG /* info = instruction pc */ | 33 | VVARARG /* info = instruction pc */ |
35 | } expkind; | 34 | } expkind; |
36 | 35 | ||
36 | |||
37 | #define vkisvar(k) (VLOCAL <= (k) && (k) <= VINDEXED) | ||
38 | #define vkisinreg(k) ((k) == VNONRELOC || (k) == VLOCAL) | ||
39 | |||
37 | typedef struct expdesc { | 40 | typedef struct expdesc { |
38 | expkind k; | 41 | expkind k; |
39 | union { | 42 | union { |
40 | struct { int info, aux; } s; | 43 | struct { /* for indexed variables (VINDEXED) */ |
41 | lua_Number nval; | 44 | short idx; /* index (R/K) */ |
45 | lu_byte t; /* table (register or upvalue) */ | ||
46 | lu_byte vt; /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */ | ||
47 | } ind; | ||
48 | int info; /* for generic use */ | ||
49 | lua_Number nval; /* for VKNUM */ | ||
42 | } u; | 50 | } u; |
43 | int t; /* patch list of `exit when true' */ | 51 | int t; /* patch list of `exit when true' */ |
44 | int f; /* patch list of `exit when false' */ | 52 | int f; /* patch list of `exit when false' */ |
45 | } expdesc; | 53 | } expdesc; |
46 | 54 | ||
47 | 55 | ||
48 | typedef struct upvaldesc { | 56 | /* description of active local variable */ |
49 | lu_byte k; | 57 | typedef struct Vardesc { |
50 | lu_byte info; | 58 | short idx; /* variable index in stack */ |
51 | } upvaldesc; | 59 | } Vardesc; |
60 | |||
61 | |||
62 | /* description of pending goto statements and label statements */ | ||
63 | typedef struct Labeldesc { | ||
64 | TString *name; /* label identifier */ | ||
65 | int pc; /* position in code */ | ||
66 | int line; /* line where it appeared */ | ||
67 | lu_byte nactvar; /* local level where it appears in current block */ | ||
68 | } Labeldesc; | ||
69 | |||
70 | |||
71 | /* list of labels or gotos */ | ||
72 | typedef struct Labellist { | ||
73 | Labeldesc *arr; /* array */ | ||
74 | int n; /* number of entries in use */ | ||
75 | int size; /* array size */ | ||
76 | } Labellist; | ||
77 | |||
78 | |||
79 | /* dynamic structures used by the parser */ | ||
80 | typedef struct Dyndata { | ||
81 | struct { /* list of active local variables */ | ||
82 | Vardesc *arr; | ||
83 | int n; | ||
84 | int size; | ||
85 | } actvar; | ||
86 | Labellist gt; /* list of pending gotos */ | ||
87 | Labellist label; /* list of active labels */ | ||
88 | } Dyndata; | ||
52 | 89 | ||
53 | 90 | ||
91 | /* control of blocks */ | ||
54 | struct BlockCnt; /* defined in lparser.c */ | 92 | struct BlockCnt; /* defined in lparser.c */ |
55 | 93 | ||
56 | 94 | ||
@@ -60,23 +98,22 @@ typedef struct FuncState { | |||
60 | Table *h; /* table to find (and reuse) elements in `k' */ | 98 | Table *h; /* table to find (and reuse) elements in `k' */ |
61 | struct FuncState *prev; /* enclosing function */ | 99 | struct FuncState *prev; /* enclosing function */ |
62 | struct LexState *ls; /* lexical state */ | 100 | struct LexState *ls; /* lexical state */ |
63 | struct lua_State *L; /* copy of the Lua state */ | ||
64 | struct BlockCnt *bl; /* chain of current blocks */ | 101 | struct BlockCnt *bl; /* chain of current blocks */ |
65 | int pc; /* next position to code (equivalent to `ncode') */ | 102 | int pc; /* next position to code (equivalent to `ncode') */ |
66 | int lasttarget; /* `pc' of last `jump target' */ | 103 | int lasttarget; /* 'label' of last 'jump label' */ |
67 | int jpc; /* list of pending jumps to `pc' */ | 104 | int jpc; /* list of pending jumps to `pc' */ |
68 | int freereg; /* first free register */ | ||
69 | int nk; /* number of elements in `k' */ | 105 | int nk; /* number of elements in `k' */ |
70 | int np; /* number of elements in `p' */ | 106 | int np; /* number of elements in `p' */ |
71 | short nlocvars; /* number of elements in `locvars' */ | 107 | int firstlocal; /* index of first local var (in Dyndata array) */ |
108 | short nlocvars; /* number of elements in 'f->locvars' */ | ||
72 | lu_byte nactvar; /* number of active local variables */ | 109 | lu_byte nactvar; /* number of active local variables */ |
73 | upvaldesc upvalues[LUAI_MAXUPVALUES]; /* upvalues */ | 110 | lu_byte nups; /* number of upvalues */ |
74 | unsigned short actvar[LUAI_MAXVARS]; /* declared-variable stack */ | 111 | lu_byte freereg; /* first free register */ |
75 | } FuncState; | 112 | } FuncState; |
76 | 113 | ||
77 | 114 | ||
78 | LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, | 115 | LUAI_FUNC Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, |
79 | const char *name); | 116 | Dyndata *dyd, const char *name, int firstchar); |
80 | 117 | ||
81 | 118 | ||
82 | #endif | 119 | #endif |