Method get_object_addr

library/LuaWrapper.cpp:987–999

* Verify that the object is a DF ref with UPVAL_METATABLE. * If everything ok, extract the address. */

 * If everything ok, extract the address.
 */
uint8_t *LuaWrapper::get_object_addr(lua_State *state, int obj, int field, const char *mode)
{
    if (!lua_isuserdata(state, obj) ||
        !lua_getmetatable(state, obj))
        field_error(state, field, "invalid object", mode);

    if (!lua_rawequal(state, -1, UPVAL_METATABLE))
        field_error(state, field, "invalid object metatable", mode);

    lua_pop(state, 1);

    return (uint8_t*)get_object_ref(state, obj);
}

/**
 * Metamethod: represent a type node as string.