PLIST_MOV_EXPAND_EX(list, offset_start, num_eles);
PLIST_CPY_R(list, PLIST_ELE(list, offset_start), eles, num_eles);
list->count = new_count;
PLIST_MOV_EXPAND_EX(list, offset_start, num_eles);
PLIST_CPY_R(list, PLIST_ELE(list, offset_start), eles, num_eles);
list->count = new_count;