+++ /dev/null
-/*
-** $Id: lobject.h,v 2.116 2015/11/03 18:33:10 roberto Exp $
-** Type definitions for Lua objects
-** See Copyright Notice in lua.h
-*/
-
-
-#ifndef lobject_h
-#define lobject_h
-
-
-#include <stdarg.h>
-
-
-#include "llimits.h"
-#include "lua.h"
-
-
-/*
-** Extra tags for non-values
-*/
-#define LUA_TPROTO LUA_NUMTAGS /* function prototypes */
-#define LUA_TDEADKEY (LUA_NUMTAGS+1) /* removed keys in tables */
-
-/*
-** number of all possible tags (including LUA_TNONE but excluding DEADKEY)
-*/
-#define LUA_TOTALTAGS (LUA_TPROTO + 2)
-
-
-/*
-** tags for Tagged Values have the following use of bits:
-** bits 0-3: actual tag (a LUA_T* value)
-** bits 4-5: variant bits
-** bit 6: whether value is collectable
-*/
-
-
-/*
-** LUA_TFUNCTION variants:
-** 0 - Lua function
-** 1 - light C function
-** 2 - regular C function (closure)
-*/
-
-/* Variant tags for functions */
-#define LUA_TLCL (LUA_TFUNCTION | (0 << 4)) /* Lua closure */
-#define LUA_TLCF (LUA_TFUNCTION | (1 << 4)) /* light C function */
-#define LUA_TCCL (LUA_TFUNCTION | (2 << 4)) /* C closure */
-
-
-/* Variant tags for strings */
-#define LUA_TSHRSTR (LUA_TSTRING | (0 << 4)) /* short strings */
-#define LUA_TLNGSTR (LUA_TSTRING | (1 << 4)) /* long strings */
-
-
-/* Variant tags for numbers */
-#define LUA_TNUMFLT (LUA_TNUMBER | (0 << 4)) /* float numbers */
-#define LUA_TNUMINT (LUA_TNUMBER | (1 << 4)) /* integer numbers */
-
-
-/* Bit mark for collectable types */
-#define BIT_ISCOLLECTABLE (1 << 6)
-
-/* mark a tag as collectable */
-#define ctb(t) ((t) | BIT_ISCOLLECTABLE)
-
-
-/*
-** Common type for all collectable objects
-*/
-typedef struct 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 type has only the common header
-*/
-struct GCObject {
- CommonHeader;
-};
-
-
-
-
-/*
-** Tagged Values. This is the basic representation of values in Lua,
-** an actual value plus a tag with its type.
-*/
-
-/*
-** Union of all Lua values
-*/
-typedef union Value {
- GCObject *gc; /* collectable objects */
- void *p; /* light userdata */
- int b; /* booleans */
- lua_CFunction f; /* light C functions */
- lua_Integer i; /* integer numbers */
- lua_Number n; /* float numbers */
-} Value;
-
-
-#define TValuefields Value value_; int tt_
-
-
-typedef struct lua_TValue {
- TValuefields;
-} TValue;
-
-
-
-/* macro defining a nil value */
-#define NILCONSTANT {NULL}, LUA_TNIL
-
-
-#define val_(o) ((o)->value_)
-
-
-/* raw type tag of a TValue */
-#define rttype(o) ((o)->tt_)
-
-/* tag with no variants (bits 0-3) */
-#define novariant(x) ((x) & 0x0F)
-
-/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */
-#define ttype(o) (rttype(o) & 0x3F)
-
-/* type tag of a TValue with no variants (bits 0-3) */
-#define ttnov(o) (novariant(rttype(o)))
-
-
-/* Macros to test type */
-#define checktag(o,t) (rttype(o) == (t))
-#define checktype(o,t) (ttnov(o) == (t))
-#define ttisnumber(o) checktype((o), LUA_TNUMBER)
-#define ttisfloat(o) checktag((o), LUA_TNUMFLT)
-#define ttisinteger(o) checktag((o), LUA_TNUMINT)
-#define ttisnil(o) checktag((o), LUA_TNIL)
-#define ttisboolean(o) checktag((o), LUA_TBOOLEAN)
-#define ttislightuserdata(o) checktag((o), LUA_TLIGHTUSERDATA)
-#define ttisstring(o) checktype((o), LUA_TSTRING)
-#define ttisshrstring(o) checktag((o), ctb(LUA_TSHRSTR))
-#define ttislngstring(o) checktag((o), ctb(LUA_TLNGSTR))
-#define ttistable(o) checktag((o), ctb(LUA_TTABLE))
-#define ttisfunction(o) checktype(o, LUA_TFUNCTION)
-#define ttisclosure(o) ((rttype(o) & 0x1F) == LUA_TFUNCTION)
-#define ttisCclosure(o) checktag((o), ctb(LUA_TCCL))
-#define ttisLclosure(o) checktag((o), ctb(LUA_TLCL))
-#define ttislcf(o) checktag((o), LUA_TLCF)
-#define ttisfulluserdata(o) checktag((o), ctb(LUA_TUSERDATA))
-#define ttisthread(o) checktag((o), ctb(LUA_TTHREAD))
-#define ttisdeadkey(o) checktag((o), LUA_TDEADKEY)
-
-
-/* Macros to access values */
-#define ivalue(o) check_exp(ttisinteger(o), val_(o).i)
-#define fltvalue(o) check_exp(ttisfloat(o), val_(o).n)
-#define nvalue(o) check_exp(ttisnumber(o), \
- (ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o)))
-#define gcvalue(o) check_exp(iscollectable(o), val_(o).gc)
-#define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p)
-#define tsvalue(o) check_exp(ttisstring(o), gco2ts(val_(o).gc))
-#define uvalue(o) check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
-#define clvalue(o) check_exp(ttisclosure(o), gco2cl(val_(o).gc))
-#define clLvalue(o) check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
-#define clCvalue(o) check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
-#define fvalue(o) check_exp(ttislcf(o), val_(o).f)
-#define hvalue(o) check_exp(ttistable(o), gco2t(val_(o).gc))
-#define bvalue(o) check_exp(ttisboolean(o), val_(o).b)
-#define thvalue(o) check_exp(ttisthread(o), gco2th(val_(o).gc))
-/* a dead value may get the 'gc' field, but cannot access its contents */
-#define deadvalue(o) check_exp(ttisdeadkey(o), cast(void *, val_(o).gc))
-
-#define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
-
-
-#define iscollectable(o) (rttype(o) & BIT_ISCOLLECTABLE)
-
-
-/* Macros for internal tests */
-#define righttt(obj) (ttype(obj) == gcvalue(obj)->tt)
-
-#define checkliveness(L,obj) \
- lua_longassert(!iscollectable(obj) || \
- (righttt(obj) && (L == NULL || !isdead(G(L),gcvalue(obj)))))
-
-
-/* Macros to set values */
-#define settt_(o,t) ((o)->tt_=(t))
-
-#define setfltvalue(obj,x) \
- { TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_TNUMFLT); }
-
-#define chgfltvalue(obj,x) \
- { TValue *io=(obj); lua_assert(ttisfloat(io)); val_(io).n=(x); }
-
-#define setivalue(obj,x) \
- { TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_TNUMINT); }
-
-#define chgivalue(obj,x) \
- { TValue *io=(obj); lua_assert(ttisinteger(io)); val_(io).i=(x); }
-
-#define setnilvalue(obj) settt_(obj, LUA_TNIL)
-
-#define setfvalue(obj,x) \
- { TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_TLCF); }
-
-#define setpvalue(obj,x) \
- { TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_TLIGHTUSERDATA); }
-
-#define setbvalue(obj,x) \
- { TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); }
-
-#define setgcovalue(L,obj,x) \
- { TValue *io = (obj); GCObject *i_g=(x); \
- val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
-
-#define setsvalue(L,obj,x) \
- { TValue *io = (obj); TString *x_ = (x); \
- val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
- checkliveness(L,io); }
-
-#define setuvalue(L,obj,x) \
- { TValue *io = (obj); Udata *x_ = (x); \
- val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TUSERDATA)); \
- checkliveness(L,io); }
-
-#define setthvalue(L,obj,x) \
- { TValue *io = (obj); lua_State *x_ = (x); \
- val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTHREAD)); \
- checkliveness(L,io); }
-
-#define setclLvalue(L,obj,x) \
- { TValue *io = (obj); LClosure *x_ = (x); \
- val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TLCL)); \
- checkliveness(L,io); }
-
-#define setclCvalue(L,obj,x) \
- { TValue *io = (obj); CClosure *x_ = (x); \
- val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TCCL)); \
- checkliveness(L,io); }
-
-#define sethvalue(L,obj,x) \
- { TValue *io = (obj); Table *x_ = (x); \
- val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTABLE)); \
- checkliveness(L,io); }
-
-#define setdeadvalue(obj) settt_(obj, LUA_TDEADKEY)
-
-
-
-#define setobj(L,obj1,obj2) \
- { TValue *io1=(obj1); *io1 = *(obj2); \
- (void)L; checkliveness(L,io1); }
-
-
-/*
-** different types of assignments, according to destination
-*/
-
-/* from stack to (same) stack */
-#define setobjs2s setobj
-/* to stack (not from same stack) */
-#define setobj2s setobj
-#define setsvalue2s setsvalue
-#define sethvalue2s sethvalue
-#define setptvalue2s setptvalue
-/* from table to same table */
-#define setobjt2t setobj
-/* to new object */
-#define setobj2n setobj
-#define setsvalue2n setsvalue
-
-/* to table (define it as an expression to be used in macros) */
-#define setobj2t(L,o1,o2) ((void)L, *(o1)=*(o2), checkliveness(L,(o1)))
-
-
-
-
-/*
-** {======================================================
-** types and prototypes
-** =======================================================
-*/
-
-
-typedef TValue *StkId; /* index to stack elements */
-
-
-
-
-/*
-** Header for string value; string bytes follow the end of this structure
-** (aligned according to 'UTString'; see next).
-*/
-typedef struct TString {
- CommonHeader;
- lu_byte extra; /* reserved words for short strings; "has hash" for longs */
- lu_byte shrlen; /* length for short strings */
- unsigned int hash;
- union {
- size_t lnglen; /* length for long strings */
- struct TString *hnext; /* linked list for hash table */
- } u;
-} TString;
-
-
-/*
-** Ensures that address after this type is always fully aligned.
-*/
-typedef union UTString {
- L_Umaxalign dummy; /* ensures maximum alignment for strings */
- TString tsv;
-} UTString;
-
-
-/*
-** Get the actual string (array of bytes) from a 'TString'.
-** (Access to 'extra' ensures that value is really a 'TString'.)
-*/
-#define getstr(ts) \
- check_exp(sizeof((ts)->extra), cast(char *, (ts)) + sizeof(UTString))
-
-
-/* get the actual string (array of bytes) from a Lua value */
-#define svalue(o) getstr(tsvalue(o))
-
-/* get string length from 'TString *s' */
-#define tsslen(s) ((s)->tt == LUA_TSHRSTR ? (s)->shrlen : (s)->u.lnglen)
-
-/* get string length from 'TValue *o' */
-#define vslen(o) tsslen(tsvalue(o))
-
-
-/*
-** Header for userdata; memory area follows the end of this structure
-** (aligned according to 'UUdata'; see next).
-*/
-typedef struct Udata {
- CommonHeader;
- lu_byte ttuv_; /* user value's tag */
- struct Table *metatable;
- size_t len; /* number of bytes */
- union Value user_; /* user value */
-} Udata;
-
-
-/*
-** Ensures that address after this type is always fully aligned.
-*/
-typedef union UUdata {
- L_Umaxalign dummy; /* ensures maximum alignment for 'local' udata */
- Udata uv;
-} UUdata;
-
-
-/*
-** Get the address of memory block inside 'Udata'.
-** (Access to 'ttuv_' ensures that value is really a 'Udata'.)
-*/
-#define getudatamem(u) \
- check_exp(sizeof((u)->ttuv_), (cast(char*, (u)) + sizeof(UUdata)))
-
-#define setuservalue(L,u,o) \
- { const TValue *io=(o); Udata *iu = (u); \
- iu->user_ = io->value_; iu->ttuv_ = rttype(io); \
- checkliveness(L,io); }
-
-
-#define getuservalue(L,u,o) \
- { TValue *io=(o); const Udata *iu = (u); \
- io->value_ = iu->user_; settt_(io, iu->ttuv_); \
- checkliveness(L,io); }
-
-
-/*
-** Description of an upvalue for function prototypes
-*/
-typedef struct Upvaldesc {
- TString *name; /* upvalue name (for debug information) */
- lu_byte instack; /* whether it is in stack (register) */
- lu_byte idx; /* index of upvalue (in stack or in outer function's list) */
-} Upvaldesc;
-
-
-/*
-** Description of a local variable for function prototypes
-** (used for debug information)
-*/
-typedef struct LocVar {
- TString *varname;
- int startpc; /* first point where variable is active */
- int endpc; /* first point where variable is dead */
-} LocVar;
-
-
-/*
-** Function Prototypes
-*/
-typedef struct Proto {
- CommonHeader;
- lu_byte numparams; /* number of fixed parameters */
- lu_byte is_vararg; /* 2: declared vararg; 1: uses vararg */
- lu_byte maxstacksize; /* number of registers needed by this function */
- int sizeupvalues; /* size of 'upvalues' */
- int sizek; /* size of 'k' */
- int sizecode;
- int sizelineinfo;
- int sizep; /* size of 'p' */
- int sizelocvars;
- int linedefined; /* debug information */
- int lastlinedefined; /* debug information */
- TValue *k; /* constants used by the function */
- Instruction *code; /* opcodes */
- struct Proto **p; /* functions defined inside the function */
- int *lineinfo; /* map from opcodes to source lines (debug information) */
- LocVar *locvars; /* information about local variables (debug information) */
- Upvaldesc *upvalues; /* upvalue information */
- struct LClosure *cache; /* last-created closure with this prototype */
- TString *source; /* used for debug information */
- GCObject *gclist;
-} Proto;
-
-
-
-/*
-** Lua Upvalues
-*/
-typedef struct UpVal UpVal;
-
-
-/*
-** Closures
-*/
-
-#define ClosureHeader \
- CommonHeader; lu_byte nupvalues; GCObject *gclist
-
-typedef struct CClosure {
- ClosureHeader;
- lua_CFunction f;
- TValue upvalue[1]; /* list of upvalues */
-} CClosure;
-
-
-typedef struct LClosure {
- ClosureHeader;
- struct Proto *p;
- UpVal *upvals[1]; /* list of upvalues */
-} LClosure;
-
-
-typedef union Closure {
- CClosure c;
- LClosure l;
-} Closure;
-
-
-#define isLfunction(o) ttisLclosure(o)
-
-#define getproto(o) (clLvalue(o)->p)
-
-
-/*
-** Tables
-*/
-
-typedef union TKey {
- struct {
- TValuefields;
- int next; /* for chaining (offset for next node) */
- } nk;
- TValue tvk;
-} TKey;
-
-
-/* copy a value into a key without messing up field 'next' */
-#define setnodekey(L,key,obj) \
- { TKey *k_=(key); const TValue *io_=(obj); \
- k_->nk.value_ = io_->value_; k_->nk.tt_ = io_->tt_; \
- (void)L; checkliveness(L,io_); }
-
-
-typedef struct Node {
- TValue i_val;
- TKey i_key;
-} 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 */
- unsigned int sizearray; /* size of 'array' array */
- TValue *array; /* array part */
- Node *node;
- Node *lastfree; /* any free position is before this position */
- struct Table *metatable;
- GCObject *gclist;
-} 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))
-
-
-/*
-** (address of) a fixed nil value
-*/
-#define luaO_nilobject (&luaO_nilobject_)
-
-
-LUAI_DDEC const TValue luaO_nilobject_;
-
-/* size of buffer for 'luaO_utf8esc' function */
-#define UTF8BUFFSZ 8
-
-LUAI_FUNC int luaO_int2fb (unsigned int x);
-LUAI_FUNC int luaO_fb2int (int x);
-LUAI_FUNC int luaO_utf8esc (char *buff, unsigned long x);
-LUAI_FUNC int luaO_ceillog2 (unsigned int x);
-LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
- const TValue *p2, TValue *res);
-LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o);
-LUAI_FUNC int luaO_hexavalue (int c);
-LUAI_FUNC void luaO_tostring (lua_State *L, StkId obj);
-LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
- va_list argp);
-LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
-LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len);
-
-
-#endif
-
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