lua/ltm.h at master · lua/lua

Cannot retrieve contributors at this time

103 lines (82 sloc) 2.84 KB

	/*
	** $Id: ltm.h $
	** Tag methods
	** See Copyright Notice in lua.h
	*/

	#ifndef ltm_h
	#define ltm_h


	#include "lobject.h"


	/*
	* WARNING: if you change the order of this enumeration,
	* grep "ORDER TM" and "ORDER OP"
	*/
	typedef enum {
	TM_INDEX,
	TM_NEWINDEX,
	TM_GC,
	TM_MODE,
	TM_LEN,
	TM_EQ, /* last tag method with fast access */
	TM_ADD,
	TM_SUB,
	TM_MUL,
	TM_MOD,
	TM_POW,
	TM_DIV,
	TM_IDIV,
	TM_BAND,
	TM_BOR,
	TM_BXOR,
	TM_SHL,
	TM_SHR,
	TM_UNM,
	TM_BNOT,
	TM_LT,
	TM_LE,
	TM_CONCAT,
	TM_CALL,
	TM_CLOSE,
	TM_N /* number of elements in the enum */
	} TMS;


	/*
	** Mask with 1 in all fast-access methods. A 1 in any of these bits
	** in the flag of a (meta)table means the metatable does not have the
	** corresponding metamethod field. (Bit 7 of the flag is used for
	** 'isrealasize'.)
	*/
	#define maskflags (~(~0u << (TM_EQ + 1)))


	/*
	** Test whether there is no tagmethod.
	** (Because tagmethods use raw accesses, the result may be an "empty" nil.)
	*/
	#define notm(tm) ttisnil(tm)


	#define gfasttm(g,et,e) ((et) == NULL ? NULL : \
	((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e]))

	#define fasttm(l,et,e) gfasttm(G(l), et, e)

	#define ttypename(x) luaT_typenames_[(x) + 1]

	LUAI_DDEC(const char *const luaT_typenames_[LUA_TOTALTYPES];)


	LUAI_FUNC const char luaT_objtypename (lua_State L, const TValue *o);

	LUAI_FUNC const TValue luaT_gettm (Table events, TMS event, TString *ename);
	LUAI_FUNC const TValue luaT_gettmbyobj (lua_State L, const TValue *o,
	TMS event);
	LUAI_FUNC void luaT_init (lua_State *L);

	LUAI_FUNC void luaT_callTM (lua_State L, const TValue f, const TValue *p1,
	const TValue p2, const TValue p3);
	LUAI_FUNC void luaT_callTMres (lua_State L, const TValue f,
	const TValue p1, const TValue p2, StkId p3);
	LUAI_FUNC void luaT_trybinTM (lua_State L, const TValue p1, const TValue *p2,
	StkId res, TMS event);
	LUAI_FUNC void luaT_tryconcatTM (lua_State *L);
	LUAI_FUNC void luaT_trybinassocTM (lua_State L, const TValue p1,
	const TValue *p2, int inv, StkId res, TMS event);
	LUAI_FUNC void luaT_trybiniTM (lua_State L, const TValue p1, lua_Integer i2,
	int inv, StkId res, TMS event);
	LUAI_FUNC int luaT_callorderTM (lua_State L, const TValue p1,
	const TValue *p2, TMS event);
	LUAI_FUNC int luaT_callorderiTM (lua_State L, const TValue p1, int v2,
	int inv, int isfloat, TMS event);

	LUAI_FUNC void luaT_adjustvarargs (lua_State *L, int nfixparams,
	struct CallInfo ci, const Proto p);
	LUAI_FUNC void luaT_getvarargs (lua_State L, struct CallInfo ci,
	StkId where, int wanted);


	#endif