src/lj_obj.c

   1 /*
   2 ** Miscellaneous object handling.
   3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
   4 */
   5
   6 #define lj_obj_c
   7 #define LUA_CORE
   8
   9 #include "lj_obj.h"
  10
  11 /* Object type names. */
  12 LJ_DATADEF const char *const lj_obj_typename[] = {  /* ORDER LUA_T */
  13   "no value", "nil", "boolean", "userdata", "number", "string",
  14   "table", "function", "userdata", "thread", "proto", "cdata"
  15 };
  16
  17 LJ_DATADEF const char *const lj_obj_itypename[] = {  /* ORDER LJ_T */
  18   "nil", "boolean", "boolean", "userdata", "string", "upval", "thread",
  19   "proto", "function", "trace", "cdata", "table", "userdata", "number"
  20 };
  21
  22 /* Compare two objects without calling metamethods. */
  23 int LJ_FASTCALL lj_obj_equal(cTValue *o1, cTValue *o2)
  24 {
  25   if (itype(o1) == itype(o2)) {
  26     if (tvispri(o1))
  27       return 1;
  28     if (!tvisnum(o1))
  29       return gcrefeq(o1->gcr, o2->gcr);
  30   } else if (!tvisnumber(o1) || !tvisnumber(o2)) {
  31     return 0;
  32   }
  33   return numberVnum(o1) == numberVnum(o2);
  34 }
  35
  36 /* Return pointer to object or its object data. */
  37 const void * LJ_FASTCALL lj_obj_ptr(global_State *g, cTValue *o)
  38 {
  39   UNUSED(g);
  40   if (tvisudata(o))
  41     return uddata(udataV(o));
  42   else if (tvislightud(o))
  43     return lightudV(g, o);
  44   else if (LJ_HASFFI && tviscdata(o))
  45     return cdataptr(cdataV(o));
  46   else if (tvisgcv(o))
  47     return gcV(o);
  48   else
  49     return NULL;
  50 }
  51