mirror of
https://github.com/UberGames/rpgxEF.git
synced 2024-11-14 17:01:21 +00:00
9cac290629
- Fixed all errors that occured due to using c++ compiler - changed c++ standart to c++17 - removed lua, added library instead - made all bg_* and q_* file into a shared item project
133 lines
4.3 KiB
C
133 lines
4.3 KiB
C
/*
|
|
** $Id: lparser.h,v 1.76 2015/12/30 18:16:13 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 and variable descriptor.
|
|
** Code generation for variables and expressions can be delayed to allow
|
|
** optimizations; An 'expdesc' structure describes a potentially-delayed
|
|
** variable/expression. It has a description of its "main" value plus a
|
|
** list of conditional jumps that can also produce its value (generated
|
|
** by short-circuit operators 'and'/'or').
|
|
*/
|
|
|
|
/* kinds of variables/expressions */
|
|
typedef enum {
|
|
VVOID, /* when 'expdesc' describes the last expression a list,
|
|
this kind means an empty list (so, no expression) */
|
|
VNIL, /* constant nil */
|
|
VTRUE, /* constant true */
|
|
VFALSE, /* constant false */
|
|
VK, /* constant in 'k'; info = index of constant in 'k' */
|
|
VKFLT, /* floating constant; nval = numerical float value */
|
|
VKINT, /* integer constant; nval = numerical integer value */
|
|
VNONRELOC, /* expression has its value in a fixed register;
|
|
info = result register */
|
|
VLOCAL, /* local variable; info = local register */
|
|
VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */
|
|
VINDEXED, /* indexed variable;
|
|
ind.vt = whether 't' is register or upvalue;
|
|
ind.t = table register or upvalue;
|
|
ind.idx = key's R/K index */
|
|
VJMP, /* expression is a test/comparison;
|
|
info = pc of corresponding jump instruction */
|
|
VRELOCABLE, /* expression can put result in any register;
|
|
info = instruction pc */
|
|
VCALL, /* expression is a function call; info = instruction pc */
|
|
VVARARG /* vararg expression; info = instruction pc */
|
|
} expkind;
|
|
|
|
|
|
#define vkisvar(k) (VLOCAL <= (k) && (k) <= VINDEXED)
|
|
#define vkisinreg(k) ((k) == VNONRELOC || (k) == VLOCAL)
|
|
|
|
typedef struct expdesc {
|
|
expkind k;
|
|
union {
|
|
lua_Integer ival; /* for VKINT */
|
|
lua_Number nval; /* for VKFLT */
|
|
int info; /* for generic use */
|
|
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;
|
|
} u;
|
|
int t; /* patch list of 'exit when true' */
|
|
int f; /* patch list of 'exit when false' */
|
|
} expdesc;
|
|
|
|
|
|
/* description of active local variable */
|
|
typedef struct Vardesc {
|
|
short idx; /* variable index in stack */
|
|
} Vardesc;
|
|
|
|
|
|
/* description of pending goto statements and label statements */
|
|
typedef struct Labeldesc {
|
|
TString *name; /* label identifier */
|
|
int pc; /* position in code */
|
|
int line; /* line where it appeared */
|
|
lu_byte nactvar; /* local level where it appears in current block */
|
|
} Labeldesc;
|
|
|
|
|
|
/* list of labels or gotos */
|
|
typedef struct Labellist {
|
|
Labeldesc *arr; /* array */
|
|
int n; /* number of entries in use */
|
|
int size; /* array size */
|
|
} Labellist;
|
|
|
|
|
|
/* dynamic structures used by the parser */
|
|
typedef struct Dyndata {
|
|
struct { /* list of active local variables */
|
|
Vardesc *arr;
|
|
int n;
|
|
int size;
|
|
} actvar;
|
|
Labellist gt; /* list of pending gotos */
|
|
Labellist label; /* list of active labels */
|
|
} Dyndata;
|
|
|
|
|
|
/* control of blocks */
|
|
struct BlockCnt; /* defined in lparser.c */
|
|
|
|
|
|
/* state needed to generate code for a given function */
|
|
typedef struct FuncState {
|
|
Proto *f; /* current function header */
|
|
struct FuncState *prev; /* enclosing function */
|
|
struct LexState *ls; /* lexical state */
|
|
struct BlockCnt *bl; /* chain of current blocks */
|
|
int pc; /* next position to code (equivalent to 'ncode') */
|
|
int lasttarget; /* 'label' of last 'jump label' */
|
|
int jpc; /* list of pending jumps to 'pc' */
|
|
int nk; /* number of elements in 'k' */
|
|
int np; /* number of elements in 'p' */
|
|
int firstlocal; /* index of first local var (in Dyndata array) */
|
|
short nlocvars; /* number of elements in 'f->locvars' */
|
|
lu_byte nactvar; /* number of active local variables */
|
|
lu_byte nups; /* number of upvalues */
|
|
lu_byte freereg; /* first free register */
|
|
} FuncState;
|
|
|
|
|
|
LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
|
|
Dyndata *dyd, const char *name, int firstchar);
|
|
|
|
|
|
#endif
|