GIFOutputCode     526 coders/gif.c     GIFOutputCode(clear_code);
GIFOutputCode     579 coders/gif.c         GIFOutputCode(waiting_code);
GIFOutputCode     597 coders/gif.c             GIFOutputCode(clear_code);
GIFOutputCode     656 coders/gif.c     GIFOutputCode(waiting_code);
GIFOutputCode     657 coders/gif.c     GIFOutputCode(end_of_information_code);