misc/liblua/lobject.h
author unc0rr
Sat, 01 Nov 2014 22:51:07 +0300
branchqmlfrontend
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parent 10017 de822cd3df3a
permissions -rw-r--r--
- Store index of color instead of its value - Reset game config when switching pages
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/*
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** $Id: lobject.h,v 2.20.1.2 2008/08/06 13:29:48 roberto Exp $
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** Type definitions for Lua objects
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** See Copyright Notice in lua.h
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*/
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#ifndef lobject_h
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#define lobject_h
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#include <stdarg.h>
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#include "llimits.h"
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#include "lua.h"
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/* tags for values visible from Lua */
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#define LAST_TAG    LUA_TTHREAD
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#define NUM_TAGS    (LAST_TAG+1)
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/*
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** Extra tags for non-values
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*/
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#define LUA_TPROTO  (LAST_TAG+1)
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#define LUA_TUPVAL  (LAST_TAG+2)
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#define LUA_TDEADKEY    (LAST_TAG+3)
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/*
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** Union of all collectable objects
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*/
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typedef union GCObject GCObject;
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/*
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** Common Header for all collectable objects (in macro form, to be
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** included in other objects)
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*/
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#define CommonHeader    GCObject *next; lu_byte tt; lu_byte marked
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/*
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** Common header in struct form
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*/
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typedef struct GCheader {
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  CommonHeader;
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} GCheader;
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/*
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** Union of all Lua values
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*/
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typedef union {
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  GCObject *gc;
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  void *p;
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  lua_Number n;
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  int b;
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} Value;
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/*
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** Tagged Values
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*/
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#define TValuefields    Value value; int tt
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typedef struct lua_TValue {
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  TValuefields;
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} TValue;
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/* Macros to test type */
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#define ttisnil(o)  (ttype(o) == LUA_TNIL)
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#define ttisnumber(o)   (ttype(o) == LUA_TNUMBER)
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#define ttisstring(o)   (ttype(o) == LUA_TSTRING)
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#define ttistable(o)    (ttype(o) == LUA_TTABLE)
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#define ttisfunction(o) (ttype(o) == LUA_TFUNCTION)
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#define ttisboolean(o)  (ttype(o) == LUA_TBOOLEAN)
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#define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA)
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#define ttisthread(o)   (ttype(o) == LUA_TTHREAD)
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#define ttislightuserdata(o)    (ttype(o) == LUA_TLIGHTUSERDATA)
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/* Macros to access values */
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#define ttype(o)    ((o)->tt)
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#define gcvalue(o)  check_exp(iscollectable(o), (o)->value.gc)
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#define pvalue(o)   check_exp(ttislightuserdata(o), (o)->value.p)
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#define nvalue(o)   check_exp(ttisnumber(o), (o)->value.n)
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#define rawtsvalue(o)   check_exp(ttisstring(o), &(o)->value.gc->ts)
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#define tsvalue(o)  (&rawtsvalue(o)->tsv)
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#define rawuvalue(o)    check_exp(ttisuserdata(o), &(o)->value.gc->u)
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#define uvalue(o)   (&rawuvalue(o)->uv)
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#define clvalue(o)  check_exp(ttisfunction(o), &(o)->value.gc->cl)
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#define hvalue(o)   check_exp(ttistable(o), &(o)->value.gc->h)
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#define bvalue(o)   check_exp(ttisboolean(o), (o)->value.b)
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#define thvalue(o)  check_exp(ttisthread(o), &(o)->value.gc->th)
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#define l_isfalse(o)    (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
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/*
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** for internal debug only
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*/
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#define checkconsistency(obj) \
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  lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt))
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#define checkliveness(g,obj) \
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  lua_assert(!iscollectable(obj) || \
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  ((ttype(obj) == (obj)->value.gc->gch.tt) && !isdead(g, (obj)->value.gc)))
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/* Macros to set values */
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#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
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#define setnvalue(obj,x) \
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  { TValue *i_o=(obj); i_o->value.n=(x); i_o->tt=LUA_TNUMBER; }
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#define setpvalue(obj,x) \
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  { TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; }
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#define setbvalue(obj,x) \
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  { TValue *i_o=(obj); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; }
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#define setsvalue(L,obj,x) \
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  { TValue *i_o=(obj); \
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    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TSTRING; \
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    checkliveness(G(L),i_o); }
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#define setuvalue(L,obj,x) \
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  { TValue *i_o=(obj); \
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    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TUSERDATA; \
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    checkliveness(G(L),i_o); }
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#define setthvalue(L,obj,x) \
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  { TValue *i_o=(obj); \
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    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTHREAD; \
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    checkliveness(G(L),i_o); }
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#define setclvalue(L,obj,x) \
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  { TValue *i_o=(obj); \
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    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TFUNCTION; \
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    checkliveness(G(L),i_o); }
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#define sethvalue(L,obj,x) \
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  { TValue *i_o=(obj); \
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    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTABLE; \
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    checkliveness(G(L),i_o); }
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#define setptvalue(L,obj,x) \
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  { TValue *i_o=(obj); \
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    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \
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    checkliveness(G(L),i_o); }
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#define setobj(L,obj1,obj2) \
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  { const TValue *o2=(obj2); TValue *o1=(obj1); \
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    o1->value = o2->value; o1->tt=o2->tt; \
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    checkliveness(G(L),o1); }
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/*
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** different types of sets, according to destination
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*/
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/* from stack to (same) stack */
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#define setobjs2s   setobj
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/* to stack (not from same stack) */
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#define setobj2s    setobj
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#define setsvalue2s setsvalue
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#define sethvalue2s sethvalue
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#define setptvalue2s    setptvalue
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/* from table to same table */
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#define setobjt2t   setobj
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/* to table */
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#define setobj2t    setobj
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/* to new object */
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#define setobj2n    setobj
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#define setsvalue2n setsvalue
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#define setttype(obj, tt) (ttype(obj) = (tt))
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#define iscollectable(o)    (ttype(o) >= LUA_TSTRING)
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typedef TValue *StkId;  /* index to stack elements */
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/*
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** String headers for string table
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*/
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typedef union TString {
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  L_Umaxalign dummy;  /* ensures maximum alignment for strings */
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  struct {
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    CommonHeader;
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    lu_byte reserved;
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    unsigned int hash;
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    size_t len;
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  } tsv;
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} TString;
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#define getstr(ts)  cast(const char *, (ts) + 1)
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#define svalue(o)       getstr(rawtsvalue(o))
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typedef union Udata {
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  L_Umaxalign dummy;  /* ensures maximum alignment for `local' udata */
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  struct {
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    CommonHeader;
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    struct Table *metatable;
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    struct Table *env;
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    size_t len;
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  } uv;
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} Udata;
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/*
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** Function Prototypes
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*/
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typedef struct Proto {
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  CommonHeader;
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  TValue *k;  /* constants used by the function */
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  Instruction *code;
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  struct Proto **p;  /* functions defined inside the function */
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  int *lineinfo;  /* map from opcodes to source lines */
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  struct LocVar *locvars;  /* information about local variables */
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  TString **upvalues;  /* upvalue names */
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  TString  *source;
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  int sizeupvalues;
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  int sizek;  /* size of `k' */
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  int sizecode;
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  int sizelineinfo;
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  int sizep;  /* size of `p' */
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  int sizelocvars;
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  int linedefined;
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  int lastlinedefined;
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  GCObject *gclist;
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  lu_byte nups;  /* number of upvalues */
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  lu_byte numparams;
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  lu_byte is_vararg;
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  lu_byte maxstacksize;
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} Proto;
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/* masks for new-style vararg */
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#define VARARG_HASARG       1
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#define VARARG_ISVARARG     2
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#define VARARG_NEEDSARG     4
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typedef struct LocVar {
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  TString *varname;
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  int startpc;  /* first point where variable is active */
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  int endpc;    /* first point where variable is dead */
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} LocVar;
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/*
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** Upvalues
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*/
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typedef struct UpVal {
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  CommonHeader;
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  TValue *v;  /* points to stack or to its own value */
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  union {
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    TValue value;  /* the value (when closed) */
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    struct {  /* double linked list (when open) */
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      struct UpVal *prev;
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      struct UpVal *next;
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    } l;
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  } u;
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} UpVal;
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/*
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** Closures
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*/
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#define ClosureHeader \
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    CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist; \
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    struct Table *env
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typedef struct CClosure {
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  ClosureHeader;
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  lua_CFunction f;
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  TValue upvalue[1];
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} CClosure;
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typedef struct LClosure {
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  ClosureHeader;
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  struct Proto *p;
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  UpVal *upvals[1];
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} LClosure;
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typedef union Closure {
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  CClosure c;
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  LClosure l;
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} Closure;
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#define iscfunction(o)  (ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC)
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#define isLfunction(o)  (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC)
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/*
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** Tables
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*/
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typedef union TKey {
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  struct {
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    TValuefields;
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    struct Node *next;  /* for chaining */
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  } nk;
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  TValue tvk;
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} TKey;
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typedef struct Node {
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  TValue i_val;
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  TKey i_key;
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} Node;
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typedef struct Table {
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  CommonHeader;
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  lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
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  lu_byte lsizenode;  /* log2 of size of `node' array */
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  struct Table *metatable;
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  TValue *array;  /* array part */
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  Node *node;
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  Node *lastfree;  /* any free position is before this position */
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  GCObject *gclist;
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  int sizearray;  /* size of `array' array */
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} Table;
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/*
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** `module' operation for hashing (size is always a power of 2)
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*/
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#define lmod(s,size) \
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    (check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1)))))
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#define twoto(x)    (1<<(x))
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#define sizenode(t) (twoto((t)->lsizenode))
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#define luaO_nilobject      (&luaO_nilobject_)
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LUAI_DATA const TValue luaO_nilobject_;
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#define ceillog2(x) (luaO_log2((x)-1) + 1)
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LUAI_FUNC int luaO_log2 (unsigned int x);
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LUAI_FUNC int luaO_int2fb (unsigned int x);
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LUAI_FUNC int luaO_fb2int (int x);
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LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
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LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result);
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LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
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                                                       va_list argp);
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LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
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LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len);
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#endif
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