misc/liblua/lobject.h
author dag10 <gottlieb.drew@gmail.com>
Wed, 16 Jan 2013 18:34:43 -0500
changeset 8393 85bd6c7b2641
parent 3697 d5b30d6373fc
child 10017 de822cd3df3a
permissions -rw-r--r--
Can now change theme for static and mission maps. Fixed mission map descriptions that had commas which broke them. Now, you must escape commas in map descriptions. Made bgwidget repaint on animation tick to avoid buffer-not-clearing issue with widgets that change overtop the background leaving a ghost image of the widget's previous state. Generated map is now the default map in the mapconfig widget.
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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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