mirror of
https://github.com/UberGames/RPG-X2.git
synced 2024-12-11 21:31:25 +00:00
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
|
|
** $Id: lparser.h,v 1.65 2010/07/07 16:27:29 roberto Exp $
|
|
** Lua Parser
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
#ifndef lparser_h
|
|
#define lparser_h
|
|
|
|
#include "llimits.h"
|
|
#include "lobject.h"
|
|
#include "lzio.h"
|
|
|
|
|
|
/*
|
|
** Expression descriptor
|
|
*/
|
|
|
|
typedef enum {
|
|
VVOID, /* no value */
|
|
VNIL,
|
|
VTRUE,
|
|
VFALSE,
|
|
VK, /* info = index of constant in `k' */
|
|
VKNUM, /* nval = numerical value */
|
|
VNONRELOC, /* info = result register */
|
|
VLOCAL, /* info = local register */
|
|
VUPVAL, /* info = index of upvalue in 'upvalues' */
|
|
VINDEXED, /* t = table register/upvalue; idx = index R/K */
|
|
VJMP, /* info = instruction pc */
|
|
VRELOCABLE, /* info = instruction pc */
|
|
VCALL, /* info = instruction pc */
|
|
VVARARG /* info = instruction pc */
|
|
} expkind;
|
|
|
|
|
|
#define vkisvar(k) (VLOCAL <= (k) && (k) <= VINDEXED)
|
|
#define vkisinreg(k) ((k) == VNONRELOC || (k) == VLOCAL)
|
|
|
|
typedef struct expdesc {
|
|
expkind k;
|
|
union {
|
|
struct { /* for indexed variables (VINDEXED) */
|
|
short idx; /* index (R/K) */
|
|
lu_byte t; /* table (register or upvalue) */
|
|
lu_byte vt; /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
|
|
} ind;
|
|
int info; /* for generic use */
|
|
lua_Number nval; /* for VKNUM */
|
|
} u;
|
|
int t; /* patch list of `exit when true' */
|
|
int f; /* patch list of `exit when false' */
|
|
} expdesc;
|
|
|
|
|
|
typedef struct vardesc {
|
|
unsigned short idx;
|
|
} vardesc;
|
|
|
|
|
|
/* list of all active local variables */
|
|
typedef struct Varlist {
|
|
vardesc *actvar;
|
|
int nactvar;
|
|
int actvarsize;
|
|
} Varlist;
|
|
|
|
|
|
struct BlockCnt; /* defined in lparser.c */
|
|
|
|
|
|
/* state needed to generate code for a given function */
|
|
typedef struct FuncState {
|
|
Proto *f; /* current function header */
|
|
Table *h; /* table to find (and reuse) elements in `k' */
|
|
struct FuncState *prev; /* enclosing function */
|
|
struct LexState *ls; /* lexical state */
|
|
struct lua_State *L; /* copy of the Lua state */
|
|
struct BlockCnt *bl; /* chain of current blocks */
|
|
int pc; /* next position to code (equivalent to `ncode') */
|
|
int lasttarget; /* `pc' of last `jump target' */
|
|
int jpc; /* list of pending jumps to `pc' */
|
|
int freereg; /* first free register */
|
|
int nk; /* number of elements in `k' */
|
|
int np; /* number of elements in `p' */
|
|
int firstlocal; /* index of first local var of this function */
|
|
short nlocvars; /* number of elements in `locvars' */
|
|
lu_byte nactvar; /* number of active local variables */
|
|
lu_byte nups; /* number of upvalues */
|
|
} FuncState;
|
|
|
|
|
|
LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
|
|
Varlist *varl, const char *name);
|
|
|
|
|
|
#endif
|