libkern/zlib/inflate.c

61  * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
78  * - Simplified bad distance check in inflate_fast()
404 /* check function to use adler32() for zlib or z_crc32() for gzip */
406 #  define UPDATE(check, buf, len) \
407     (state->flags ? z_crc32(check, buf, len) : adler32(check, buf, len))
409 #  define UPDATE(check, buf, len) adler32(check, buf, len)
412 /* check macros for header crc */
414 #  define CRC2(check, word) \
418         check = z_crc32(check, hbuf, 2); \
421 #  define CRC4(check, word) \
427         check = z_crc32(check, hbuf, 4); \
564    update the check value, and determine whether any progress has been made
611     if (state->mode == TYPE) state->mode = TYPEDO;      /* skip check */
626                 state->check = z_crc32(0L, Z_NULL, 0);
627                 CRC2(state->check, hold);
635             if (!(state->wrap & 1) ||   /* check if zlib header allowed */
640                 strm->msg = (char *)"incorrect header check";
658             strm->adler = state->check = adler32(0L, Z_NULL, 0);
678             if (state->flags & 0x0200) CRC2(state->check, hold);
685             if (state->flags & 0x0200) CRC4(state->check, hold);
694             if (state->flags & 0x0200) CRC2(state->check, hold);
703                 if (state->flags & 0x0200) CRC2(state->check, hold);
722                         state->check = z_crc32(state->check, next, copy);
743                     state->check = z_crc32(state->check, next, copy);
764                     state->check = z_crc32(state->check, next, copy);
775                 if (hold != (state->check & 0xffff)) {
786             strm->adler = state->check = z_crc32(0L, Z_NULL, 0);
792             strm->adler = state->check = REVERSE(hold);
800             strm->adler = state->check = adler32(0L, Z_NULL, 0);
1113                     strm->adler = state->check =
1114                         UPDATE(state->check, put - out, out);
1120                      REVERSE(hold)) != state->check) {
1121                     strm->msg = (char *)"incorrect data check";
1126                 Tracev((stderr, "inflate:   check matches trailer\n"));
1134                     strm->msg = (char *)"incorrect length check";
1157        Return from inflate(), updating the total counts and the check value.
1175         strm->adler = state->check =
1176             UPDATE(state->check, strm->next_out - out, out);
1206     /* check state */
1212     /* check for correct dictionary id */
1216         if (id != state->check)
1246     /* check state */
1299     /* check parameters */
1337    implementation to provide an additional safety check. PPP uses
1361     /* check input */