tdb2: make jenkins_hash function non-static, rename to tdb_jenkins_hash.

[ccan] / ccan / tdb2 / hash.c

diff --git a/ccan/tdb2/hash.c b/ccan/tdb2/hash.c
index 1359cfecd66dc6280e3314e78fd2e7e5ea91c8bd..56c5086e742552480a23e81a8e2a7baafe583d73 100644 (file)
--- a/ccan/tdb2/hash.c
+++ b/ccan/tdb2/hash.c
@@ -16,8 +16,20 @@
    License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 #include "private.h"
    License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 #include "private.h"

+#include <ccan/hash/hash.h>

 #include <assert.h>
 
 #include <assert.h>
 

+/* Default hash function. */
+uint64_t tdb_jenkins_hash(const void *key, size_t length, uint64_t seed,
+                         void *unused)
+{
+       uint64_t ret;
+       /* hash64_stable assumes lower bits are more important; they are a
+        * slightly better hash.  We use the upper bits first, so swap them. */
+       ret = hash64_stable((const unsigned char *)key, length, seed);
+       return (ret >> 32) | (ret << 32);
+}
+

 uint64_t tdb_hash(struct tdb_context *tdb, const void *ptr, size_t len)
 {
        return tdb->hash_fn(ptr, len, tdb->hash_seed, tdb->hash_data);
 uint64_t tdb_hash(struct tdb_context *tdb, const void *ptr, size_t len)
 {
        return tdb->hash_fn(ptr, len, tdb->hash_seed, tdb->hash_data);