mirror of
https://github.com/lua/lua
synced 2024-11-22 21:01:26 +03:00
335 lines
7.3 KiB
C
335 lines
7.3 KiB
C
/*
|
|
** $Id: lobject.h,v 1.154 2002/11/14 11:51:50 roberto Exp roberto $
|
|
** Type definitions for Lua objects
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
#ifndef lobject_h
|
|
#define lobject_h
|
|
|
|
|
|
#include "llimits.h"
|
|
#include "lua.h"
|
|
|
|
|
|
/* tags for values visible from Lua */
|
|
#define NUM_TAGS LUA_TTHREAD
|
|
|
|
|
|
/*
|
|
** Extra tags for non-values
|
|
*/
|
|
#define LUA_TPROTO (NUM_TAGS+1)
|
|
#define LUA_TUPVAL (NUM_TAGS+2)
|
|
|
|
|
|
/*
|
|
** Union of all collectable objects
|
|
*/
|
|
typedef union GCObject GCObject;
|
|
|
|
|
|
/*
|
|
** Common Header for all collectable objects (in macro form, to be
|
|
** included in other objects)
|
|
*/
|
|
#define CommonHeader GCObject *next; lu_byte tt; lu_byte marked
|
|
|
|
|
|
/*
|
|
** Common header in struct form
|
|
*/
|
|
typedef struct GCheader {
|
|
CommonHeader;
|
|
} GCheader;
|
|
|
|
|
|
|
|
|
|
/*
|
|
** Union of all Lua values
|
|
*/
|
|
typedef union {
|
|
GCObject *gc;
|
|
void *p;
|
|
lua_Number n;
|
|
int b;
|
|
} Value;
|
|
|
|
|
|
/*
|
|
** Lua values (or `tagged objects')
|
|
*/
|
|
typedef struct lua_TObject {
|
|
int tt;
|
|
Value value;
|
|
} TObject;
|
|
|
|
|
|
/* Macros to test type */
|
|
#define ttisnil(o) (ttype(o) == LUA_TNIL)
|
|
#define ttisnumber(o) (ttype(o) == LUA_TNUMBER)
|
|
#define ttisstring(o) (ttype(o) == LUA_TSTRING)
|
|
#define ttistable(o) (ttype(o) == LUA_TTABLE)
|
|
#define ttisfunction(o) (ttype(o) == LUA_TFUNCTION)
|
|
#define ttisboolean(o) (ttype(o) == LUA_TBOOLEAN)
|
|
#define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA)
|
|
#define ttisthread(o) (ttype(o) == LUA_TTHREAD)
|
|
#define ttislightuserdata(o) (ttype(o) == LUA_TLIGHTUSERDATA)
|
|
|
|
/* Macros to access values */
|
|
#define ttype(o) ((o)->tt)
|
|
#define gcvalue(o) check_exp(iscollectable(o), (o)->value.gc)
|
|
#define pvalue(o) check_exp(ttislightuserdata(o), (o)->value.p)
|
|
#define nvalue(o) check_exp(ttisnumber(o), (o)->value.n)
|
|
#define tsvalue(o) check_exp(ttisstring(o), &(o)->value.gc->ts)
|
|
#define uvalue(o) check_exp(ttisuserdata(o), &(o)->value.gc->u)
|
|
#define clvalue(o) check_exp(ttisfunction(o), &(o)->value.gc->cl)
|
|
#define hvalue(o) check_exp(ttistable(o), &(o)->value.gc->h)
|
|
#define bvalue(o) check_exp(ttisboolean(o), (o)->value.b)
|
|
#define thvalue(o) check_exp(ttisthread(o), &(o)->value.gc->th)
|
|
|
|
#define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
|
|
|
|
/* Macros to set values */
|
|
#define setnvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TNUMBER; i_o->value.n=(x); }
|
|
|
|
#define chgnvalue(obj,x) \
|
|
check_exp(ttype(obj)==LUA_TNUMBER, (obj)->value.n=(x))
|
|
|
|
#define setpvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TLIGHTUSERDATA; i_o->value.p=(x); }
|
|
|
|
#define setbvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TBOOLEAN; i_o->value.b=(x); }
|
|
|
|
#define setsvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TSTRING; \
|
|
i_o->value.gc=cast(GCObject *, (x)); \
|
|
lua_assert(i_o->value.gc->gch.tt == LUA_TSTRING); }
|
|
|
|
#define setuvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TUSERDATA; \
|
|
i_o->value.gc=cast(GCObject *, (x)); \
|
|
lua_assert(i_o->value.gc->gch.tt == LUA_TUSERDATA); }
|
|
|
|
#define setthvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TTHREAD; \
|
|
i_o->value.gc=cast(GCObject *, (x)); \
|
|
lua_assert(i_o->value.gc->gch.tt == LUA_TTHREAD); }
|
|
|
|
#define setclvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TFUNCTION; \
|
|
i_o->value.gc=cast(GCObject *, (x)); \
|
|
lua_assert(i_o->value.gc->gch.tt == LUA_TFUNCTION); }
|
|
|
|
#define sethvalue(obj,x) \
|
|
{ TObject *i_o=(obj); i_o->tt=LUA_TTABLE; \
|
|
i_o->value.gc=cast(GCObject *, (x)); \
|
|
lua_assert(i_o->value.gc->gch.tt == LUA_TTABLE); }
|
|
|
|
#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
|
|
|
|
|
|
|
|
/*
|
|
** for internal debug only
|
|
*/
|
|
#define checkconsistency(obj) \
|
|
lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt))
|
|
|
|
|
|
#define setobj(obj1,obj2) \
|
|
{ const TObject *o2=(obj2); TObject *o1=(obj1); \
|
|
checkconsistency(o2); \
|
|
o1->tt=o2->tt; o1->value = o2->value; }
|
|
|
|
|
|
/*
|
|
** different types of sets, according to destination
|
|
*/
|
|
|
|
/* from stack to (same) stack */
|
|
#define setobjs2s setobj
|
|
/* to stack (not from same stack) */
|
|
#define setobj2s setobj
|
|
#define setsvalue2s setsvalue
|
|
/* from table to same table */
|
|
#define setobjt2t setobj
|
|
/* to table */
|
|
#define setobj2t setobj
|
|
/* to new object */
|
|
#define setobj2n setobj
|
|
#define setsvalue2n setsvalue
|
|
|
|
#define setttype(obj, tt) (ttype(obj) = (tt))
|
|
|
|
|
|
#define iscollectable(o) (ttype(o) >= LUA_TSTRING)
|
|
|
|
|
|
|
|
typedef TObject *StkId; /* index to stack elements */
|
|
|
|
|
|
/*
|
|
** String headers for string table
|
|
*/
|
|
typedef union TString {
|
|
L_Umaxalign dummy; /* ensures maximum alignment for strings */
|
|
struct {
|
|
CommonHeader;
|
|
lu_byte reserved;
|
|
lu_hash hash;
|
|
size_t len;
|
|
} tsv;
|
|
} TString;
|
|
|
|
|
|
#define getstr(ts) cast(const char *, (ts) + 1)
|
|
#define svalue(o) getstr(tsvalue(o))
|
|
|
|
|
|
|
|
typedef union Udata {
|
|
L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */
|
|
struct {
|
|
CommonHeader;
|
|
struct Table *metatable;
|
|
size_t len;
|
|
} uv;
|
|
} Udata;
|
|
|
|
|
|
|
|
|
|
/*
|
|
** Function Prototypes
|
|
*/
|
|
typedef struct Proto {
|
|
CommonHeader;
|
|
TObject *k; /* constants used by the function */
|
|
Instruction *code;
|
|
struct Proto **p; /* functions defined inside the function */
|
|
int *lineinfo; /* map from opcodes to source lines */
|
|
struct LocVar *locvars; /* information about local variables */
|
|
TString *source;
|
|
int sizek; /* size of `k' */
|
|
int sizecode;
|
|
int sizelineinfo;
|
|
int sizep; /* size of `p' */
|
|
int sizelocvars;
|
|
int lineDefined;
|
|
GCObject *gclist;
|
|
lu_byte nupvalues;
|
|
lu_byte numparams;
|
|
lu_byte is_vararg;
|
|
lu_byte maxstacksize;
|
|
} Proto;
|
|
|
|
|
|
typedef struct LocVar {
|
|
TString *varname;
|
|
int startpc; /* first point where variable is active */
|
|
int endpc; /* first point where variable is dead */
|
|
} LocVar;
|
|
|
|
|
|
|
|
/*
|
|
** Upvalues
|
|
*/
|
|
|
|
typedef struct UpVal {
|
|
CommonHeader;
|
|
TObject *v; /* points to stack or to its own value */
|
|
TObject value; /* the value (when closed) */
|
|
} UpVal;
|
|
|
|
|
|
/*
|
|
** Closures
|
|
*/
|
|
|
|
#define ClosureHeader \
|
|
CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist
|
|
|
|
typedef struct CClosure {
|
|
ClosureHeader;
|
|
lua_CFunction f;
|
|
TObject upvalue[1];
|
|
} CClosure;
|
|
|
|
|
|
typedef struct LClosure {
|
|
ClosureHeader;
|
|
struct Proto *p;
|
|
TObject g; /* global table for this closure */
|
|
UpVal *upvals[1];
|
|
} LClosure;
|
|
|
|
|
|
typedef union Closure {
|
|
CClosure c;
|
|
LClosure l;
|
|
} Closure;
|
|
|
|
|
|
#define iscfunction(o) (ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC)
|
|
#define isLfunction(o) (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC)
|
|
|
|
|
|
/*
|
|
** Tables
|
|
*/
|
|
|
|
typedef struct Node {
|
|
TObject i_key;
|
|
TObject i_val;
|
|
struct Node *next; /* for chaining */
|
|
} Node;
|
|
|
|
|
|
typedef struct Table {
|
|
CommonHeader;
|
|
lu_byte flags; /* 1<<p means tagmethod(p) is not present */
|
|
lu_byte lsizenode; /* log2 of size of `node' array */
|
|
struct Table *metatable;
|
|
TObject *array; /* array part */
|
|
Node *node;
|
|
Node *firstfree; /* this position is free; all positions after it are full */
|
|
GCObject *gclist;
|
|
int sizearray; /* size of `array' array */
|
|
} Table;
|
|
|
|
|
|
|
|
/*
|
|
** `module' operation for hashing (size is always a power of 2)
|
|
*/
|
|
#define lmod(s,size) \
|
|
check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1))))
|
|
|
|
|
|
#define twoto(x) (1<<(x))
|
|
#define sizenode(t) (twoto((t)->lsizenode))
|
|
#define sizearray(t) ((t)->sizearray)
|
|
|
|
|
|
|
|
extern const TObject luaO_nilobject;
|
|
|
|
int luaO_log2 (unsigned int x);
|
|
|
|
|
|
int luaO_rawequalObj (const TObject *t1, const TObject *t2);
|
|
int luaO_str2d (const char *s, lua_Number *result);
|
|
|
|
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp);
|
|
const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
|
|
void luaO_chunkid (char *out, const char *source, int len);
|
|
|
|
|
|
#endif
|