len2.
*/
+/*
+ZEXTERN void ZEXPORT crc32_combine_gen OF((z_crc_t op[32], z_off_t len2));
+
+ Generate the operator op corresponding to length len2, to be used with
+ crc32_combine_op(). op must have room for 32 z_crc_t values. (32 is the
+ number of bits in the CRC.)
+*/
+
+ZEXTERN uLong ZEXPORT crc32_combine_op OF((uLong crc1, uLong crc2,
+ const z_crc_t *op));
+/*
+ Give the same result as crc32_combine(), using op in place of len2. op is
+ is generated from len2 by crc32_combine_gen(). This will be faster than
+ crc32_combine() if the generated op is used many times.
+*/
+
/* various hacks, don't look :) */
ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t));
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t));
+ ZEXTERN void ZEXPORT crc32_combine_gen64 OF((z_crc_t *op, z_off64_t));
#endif
#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64)
# define z_gzoffset z_gzoffset64
# define z_adler32_combine z_adler32_combine64
# define z_crc32_combine z_crc32_combine64
+# define z_crc32_combine_gen z_crc32_combine64_gen
# else
# define gzopen gzopen64
# define gzseek gzseek64
# define gzoffset gzoffset64
# define adler32_combine adler32_combine64
# define crc32_combine crc32_combine64
+# define crc32_combine_gen crc32_combine_gen64
# endif
# ifndef Z_LARGE64
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile));
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
+ ZEXTERN void ZEXPORT crc32_combine_gen64 OF((z_crc_t *op, z_off_t));
# endif
#else
ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *));
ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile));
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
+ ZEXTERN void ZEXPORT crc32_combine_gen OF((z_crc_t *op, z_off_t));
#endif
#else /* Z_SOLO */
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
+ ZEXTERN void ZEXPORT crc32_combine_gen OF((z_crc_t *op, z_off_t));
#endif /* !Z_SOLO */