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Diffstat (limited to 'lib/lua/includes/lobject.h')
| -rw-r--r-- | lib/lua/includes/lobject.h | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/lib/lua/includes/lobject.h b/lib/lua/includes/lobject.h new file mode 100644 index 0000000..faa8373 --- /dev/null +++ b/lib/lua/includes/lobject.h @@ -0,0 +1,336 @@ +/*
+** $Id: lobject.h,v 1.1 2003-11-06 11:56:07 pixel Exp $
+** 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 **upvalues; /* upvalue names */
+ TString *source;
+ int sizeupvalues;
+ int sizek; /* size of `k' */
+ int sizecode;
+ int sizelineinfo;
+ int sizep; /* size of `p' */
+ int sizelocvars;
+ int lineDefined;
+ GCObject *gclist;
+ lu_byte nups; /* number of upvalues */
+ 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))
+
+
+
+extern const TObject luaO_nilobject;
+
+int luaO_log2 (unsigned int x);
+int luaO_int2fb (unsigned int x);
+#define fb2int(x) (((x) & 7) << ((x) >> 3))
+
+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
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