232     if (version == Z_NULL || version[0] != my_version[0] ||  in deflateInit2_()
236     if (strm == Z_NULL) return Z_STREAM_ERROR;  in deflateInit2_()
238     strm->msg = Z_NULL;  in deflateInit2_()
277     if (s == Z_NULL) return Z_MEM_ERROR;  in deflateInit2_()
282     s->gzhead = Z_NULL;  in deflateInit2_()
304     if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||  in deflateInit2_()
305         s->pending_buf == Z_NULL) {  in deflateInit2_()
333     if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL)  in deflateSetDictionary()
396     if (strm == Z_NULL || strm->state == Z_NULL ||  in deflateResetKeep()
402     strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */  in deflateResetKeep()
415         s->wrap == 2 ? crc32(0L, Z_NULL, 0) :  in deflateResetKeep()
417         adler32(0L, Z_NULL, 0);  in deflateResetKeep()
442     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
454     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflatePending()
455     if (pending != Z_NULL)  in deflatePending()
457     if (bits != Z_NULL)  in deflatePending()
471     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
498     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateParams()
539     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateTune()
578     if (strm == Z_NULL || strm->state == Z_NULL)  in deflateBound()
592         if (s->gzhead != Z_NULL) {          /* user-supplied gzip header */  in deflateBound()
593             if (s->gzhead->extra != Z_NULL)  in deflateBound()
596             if (str != Z_NULL)  in deflateBound()
601             if (str != Z_NULL)  in deflateBound()
671     if (strm == Z_NULL || strm->state == Z_NULL ||  in deflate()
677     if (strm->next_out == Z_NULL ||  in deflate()
678         (strm->next_in == Z_NULL && strm->avail_in != 0) ||  in deflate()
692             strm->adler = crc32(0L, Z_NULL, 0);  in deflate()
696             if (s->gzhead == Z_NULL) {  in deflate()
711                             (s->gzhead->extra == Z_NULL ? 0 : 4) +  in deflate()
712                             (s->gzhead->name == Z_NULL ? 0 : 8) +  in deflate()
713                             (s->gzhead->comment == Z_NULL ? 0 : 16)  in deflate()
723                 if (s->gzhead->extra != Z_NULL) {  in deflate()
760             strm->adler = adler32(0L, Z_NULL, 0);  in deflate()
765         if (s->gzhead->extra != Z_NULL) {  in deflate()
793         if (s->gzhead->name != Z_NULL) {  in deflate()
824         if (s->gzhead->comment != Z_NULL) {  in deflate()
859                 strm->adler = crc32(0L, Z_NULL, 0);  in deflate()
983     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;  in deflateEnd()
1003     strm->state = Z_NULL;  in deflateEnd()
1025     if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {  in deflateCopy()
1034     if (ds == Z_NULL) return Z_MEM_ERROR;  in deflateCopy()
1045     if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||  in deflateCopy()
1046         ds->pending_buf == Z_NULL) {  in deflateCopy()
1540                    (charf *)Z_NULL), \