/* BEGIN CSTYLED */ /* ** $Id: ltm.c,v 2.14.1.1 2013/04/12 18:48:47 roberto Exp $ ** Tag methods ** See Copyright Notice in lua.h */ #define ltm_c #define LUA_CORE #include #include "lobject.h" #include "lstate.h" #include "lstring.h" #include "ltable.h" #include "ltm.h" static const char udatatypename[] = "userdata"; LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = { "no value", "nil", "boolean", udatatypename, "number", "string", "table", "function", udatatypename, "thread", "proto", "upval" /* these last two cases are used for tests only */ }; void luaT_init (lua_State *L) { static const char *const luaT_eventname[] = { /* ORDER TM */ "__index", "__newindex", "__gc", "__mode", "__len", "__eq", "__add", "__sub", "__mul", "__div", "__mod", "__pow", "__unm", "__lt", "__le", "__concat", "__call" }; int i; for (i=0; itmname[i] = luaS_new(L, luaT_eventname[i]); luaS_fix(G(L)->tmname[i]); /* never collect these names */ } } /* ** function to be used with macro "fasttm": optimized for absence of ** tag methods */ const TValue *luaT_gettm (Table *events, TMS event, TString *ename) { const TValue *tm = luaH_getstr(events, ename); lua_assert(event <= TM_EQ); if (ttisnil(tm)) { /* no tag method? */ events->flags |= cast_byte(1u<metatable; break; case LUA_TUSERDATA: mt = uvalue(o)->metatable; break; default: mt = G(L)->mt[ttypenv(o)]; } return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject); } /* END CSTYLED */