diff options
| -rw-r--r-- | src/util/crc32.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/util/crc32.c b/src/util/crc32.c index f2e01c61e5..425046ab5f 100644 --- a/src/util/crc32.c +++ b/src/util/crc32.c @@ -33,6 +33,9 @@ */ +#ifdef HAVE_ZLIB +#include <zlib.h> +#endif #include "crc32.h" @@ -114,6 +117,16 @@ util_hash_crc32(const void *data, size_t size) const uint8_t *p = data; uint32_t crc = 0xffffffff; +#ifdef HAVE_ZLIB + /* Prefer zlib's implementation for better performance. + * zlib's uInt is always "unsigned int" while size_t can be 64bit. + * Since 1.2.9 there's crc32_z that takes size_t, but use the more + * available function to avoid build system complications. + */ + if ((uInt)size == size) + return ~crc32(0, data, size); +#endif + while (size--) crc = util_crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8); |