35  * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
52  * - Simplified bad distance check in inflate_fast()
79  * - Check next_in and next_out for Z_NULL on entry to inflate()
450 /* check function to use adler32() for zlib or crc32() for gzip */
452 #  define UPDATE_CHECK(check, buf, len) \  argument
453     (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
455 #  define UPDATE_CHECK(check, buf, len) adler32(check, buf, len)  argument
458 /* check macros for header crc */
460 #  define CRC2(check, word) \  argument
464         check = crc32(check, hbuf, 2); \
467 #  define CRC4(check, word) \  argument
473         check = crc32(check, hbuf, 4); \
605    update the check value, and determine whether any progress has been made
652     if (state->mode == TYPE) state->mode = TYPEDO;      /* skip check */
669                 state->check = crc32(0L, Z_NULL, 0);
670                 CRC2(state->check, hold);
677             if (!(state->wrap & 1) ||   /* check if zlib header allowed */
682                 strm->msg = (char *)"incorrect header check";
703             strm->adler = state->check = adler32(0L, Z_NULL, 0);
724                 CRC2(state->check, hold);
733                 CRC4(state->check, hold);
744                 CRC2(state->check, hold);
755                     CRC2(state->check, hold);
775                         state->check = crc32(state->check, next, copy);
797                     state->check = crc32(state->check, next, copy);
819                     state->check = crc32(state->check, next, copy);
831                 if ((state->wrap & 4) && hold != (state->check & 0xffff)) {
842             strm->adler = state->check = crc32(0L, Z_NULL, 0);
848             strm->adler = state->check = ZSWAP32(hold);
857             strm->adler = state->check = adler32(0L, Z_NULL, 0);
866                 state->mode = CHECK;
1026             /* check for end-of-block code (better have one) */
1219         case CHECK:
1226                     strm->adler = state->check =
1227                         UPDATE_CHECK(state->check, put - out, out);
1233                      ZSWAP32(hold)) != state->check) {
1234                     strm->msg = (char *)"incorrect data check";
1239                 Tracev((stderr, "inflate:   check matches trailer\n"));
1248                     strm->msg = (char *)"incorrect length check";
1273        Return from inflate(), updating the total counts and the check value.
1281             (state->mode < CHECK || flush != Z_FINISH)))
1292         strm->adler = state->check =
1293             UPDATE_CHECK(state->check, strm->next_out - out, out);
1323     /* check state */
1348     /* check state */
1354     /* check for correct dictionary identifier */
1358         if (dictid != state->check)
1380     /* check state */
1434     /* check parameters */
1465         state->wrap &= ~4;  /* no point in computing a check value now */
1478    implementation to provide an additional safety check. PPP uses
1502     /* check input */
1558 int ZEXPORT inflateValidate(strm, check)  in inflateValidate()  argument
1560 int check;
1566     if (check && state->wrap)