text: /*
  ** $Id: ltm.c,v 2.8 2006/01/10 12:50:00 roberto Exp $
  ** Tag methods
  ** See Copyright Notice in lua.h
  */
  #pragma warning(disable:6385 6386 6011 6294 6201 6387 6326)
  
  #include <string.h>
  
  #define ltm_c
  #define LUA_CORE
  
  #include "lua.h"
  
  #include "lobject.h"
  #include "lstate.h"
  #include "lstring.h"
  #include "ltable.h"
  #include "ltm.h"
  
  
  
  const char *const luaT_typenames[] = {
    "nil", "boolean", "userdata", "number",
    "string", "table", "function", "userdata", "thread",
    "proto", "upval"
  };
  
  
  void luaT_init (lua_State *L) {
    static const char *const luaT_eventname[] = {  /* ORDER TM */
      "__index", "__newindex",
      "__gc", "__mode", "__eq",
      "__add", "__sub", "__mul", "__div", "__mod",
      "__pow", "__unm", "__len", "__lt", "__le",
      "__concat", "__call"
    };
    int i;
    for (i=0; i<TM_N; i++) {
      G(L)->tmname[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<<event);  /* cache this fact */
      return NULL;
    }
    else return tm;
  }
  
  
  const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
    Table *mt;
    switch (ttype(o)) {
      case LUA_TTABLE:
        mt = hvalue(o)->metatable;
        break;
      case LUA_TUSERDATA:
        mt = uvalue(o)->metatable;
        break;
      default:
        mt = G(L)->mt[ttype(o)];
    }
    return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject);
  }
  
  