Function lua_compare

3rd/lua-5.4.3/src/lapi.c:345–362

LUA_API int lua_compare (lua_State *L, int index1, int index2, int op) {
  const TValue *o1;
  const TValue *o2;
  int i = 0;
  lua_lock(L);  /* may call tag method */
  o1 = index2value(L, index1);
  o2 = index2value(L, index2);
  if (isvalid(L, o1) && isvalid(L, o2)) {
    switch (op) {
      case LUA_OPEQ: i = luaV_equalobj(L, o1, o2); break;
      case LUA_OPLT: i = luaV_lessthan(L, o1, o2); break;
      case LUA_OPLE: i = luaV_lessequal(L, o1, o2); break;
      default: api_check(L, 0, "invalid option");
    }
  }
  lua_unlock(L);
  return i;
}


LUA_API size_t lua_stringtonumber (lua_State *L, const char *s) {