223     case Z_OK:  in PyZlib_compress()
266     if (err == Z_OK) {  in PyZlib_compress()
311     case Z_OK:  in PyZlib_decompress()
339             case Z_OK:            /* fall through */  in PyZlib_decompress()
366     if (err != Z_OK) {  in PyZlib_decompress()
400     case Z_OK:  in PyZlib_compressobj()
436     case Z_OK:  in PyZlib_decompressobj()
588     int err = Z_OK;  in PyZlib_objdecompress()
636             case Z_OK:            /* fall through */  in PyZlib_objdecompress()
655     if (err != Z_STREAM_END && err != Z_OK && err != Z_BUF_ERROR) {  in PyZlib_objdecompress()
729         if (err != Z_OK) {  in PyZlib_flush()
741     } else if (err != Z_OK && err != Z_BUF_ERROR) {  in PyZlib_flush()
774     case Z_OK:  in PyZlib_copy()
823     case Z_OK:  in PyZlib_uncopy()
896             case Z_OK:            /* fall through */  in PyZlib_unflush()
920         if (err != Z_OK) {  in PyZlib_unflush()