254     if (version == Z_NULL || version[0] != my_version[0] ||  in deflateInit2_()
258     if (strm == Z_NULL) return Z_STREAM_ERROR;  in deflateInit2_()
260     strm->msg = Z_NULL;  in deflateInit2_()
292     if (s == Z_NULL) return Z_MEM_ERROR;  in deflateInit2_()
297     s->gzhead = Z_NULL;  in deflateInit2_()
317     if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||  in deflateInit2_()
318         s->pending_buf == Z_NULL) {  in deflateInit2_()
343     if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||  in deflateSetDictionary()
395     if (strm == Z_NULL || strm->state == Z_NULL ||  in deflateReset()
401     strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */  in deflateReset()
416         s->wrap == 2 ? z_crc32(0L, Z_NULL, 0) :  in deflateReset()
418         adler32(0L, Z_NULL, 0);  in deflateReset()
431     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateSetHeader()
441     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflatePrime()
455     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateParams()
490     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateTune()
527     if (strm == Z_NULL || strm->state == Z_NULL)  in deflateBound()
587     if (strm == Z_NULL || strm->state == Z_NULL ||  in deflate()
593     if (strm->next_out == Z_NULL ||  in deflate()
594         (strm->next_in == Z_NULL && strm->avail_in != 0) ||  in deflate()
608             strm->adler = z_crc32(0L, Z_NULL, 0);  in deflate()
627                             (s->gzhead->extra == Z_NULL ? 0 : 4) +  in deflate()
628                             (s->gzhead->name == Z_NULL ? 0 : 8) +  in deflate()
629                             (s->gzhead->comment == Z_NULL ? 0 : 16)  in deflate()
676             strm->adler = adler32(0L, Z_NULL, 0);  in deflate()
775                 strm->adler = z_crc32(0L, Z_NULL, 0);  in deflate()
892     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateEnd()
912     strm->state = Z_NULL;  in deflateEnd()
933     if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {  in deflateCopy()
942     if (ds == Z_NULL) return Z_MEM_ERROR;  in deflateCopy()
953     if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||  in deflateCopy()
954         ds->pending_buf == Z_NULL) {  in deflateCopy()
1392                    (charf *)Z_NULL), \