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

We're going to need access to it from tdb1_open, so expose it now.
It's better in hash.c anyway.

ccan/tdb2/hash.c

@@ -16,8 +16,20 @@
    License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 #include "private.h"
+#include <ccan/hash/hash.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);

ccan/tdb2/open.c

@@ -16,7 +16,6 @@
    License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 #include "private.h"
-#include <ccan/hash/hash.h>
 #include <assert.h>
 
 /* all tdbs, to detect double-opens (fcntl file don't nest!) */
@@ -242,16 +241,6 @@ enum TDB_ERROR tdb_set_attribute(struct tdb_context *tdb,
 	return TDB_SUCCESS;
 }
 
-static uint64_t 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);
-}
-
 enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
 				 union tdb_attribute *attr)
 {
@@ -371,7 +360,7 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
 	tdb->openhook = NULL;
 	tdb->lock_fn = tdb_fcntl_lock;
 	tdb->unlock_fn = tdb_fcntl_unlock;
-	tdb->hash_fn = jenkins_hash;
+	tdb->hash_fn = tdb_jenkins_hash;
 	memset(&tdb->stats, 0, sizeof(tdb->stats));
 	tdb->stats.base.attr = TDB_ATTRIBUTE_STATS;
 	tdb->stats.size = sizeof(tdb->stats);

ccan/tdb2/private.h

@@ -338,6 +338,9 @@ struct tdb_methods {
   internal prototypes
 */
 /* hash.c: */
+uint64_t tdb_jenkins_hash(const void *key, size_t length, uint64_t seed,
+			  void *unused);
+
 tdb_bool_err first_in_hash(struct tdb_context *tdb,
 			   struct traverse_info *tinfo,
 			   TDB_DATA *kbuf, size_t *dlen);

ccan/tdb2/test/failtest_helper.h

@@ -4,9 +4,9 @@
 #include <stdbool.h>
 
 /* FIXME: Check these! */
-#define INITIAL_TDB_MALLOC	"open.c", 354, FAILTEST_MALLOC
-#define URANDOM_OPEN		"open.c", 62, FAILTEST_OPEN
-#define URANDOM_READ		"open.c", 42, FAILTEST_READ
+#define INITIAL_TDB_MALLOC	"open.c", 343, FAILTEST_MALLOC
+#define URANDOM_OPEN		"open.c", 61, FAILTEST_OPEN
+#define URANDOM_READ		"open.c", 41, FAILTEST_READ
 
 bool exit_check_log(struct failtest_call *history, unsigned num);
 bool failmatch(const struct failtest_call *call,

ccan/tdb2/test/run-90-get-set-attributes.c

@@ -61,7 +61,7 @@ int main(int argc, char *argv[])
 		attr.base.attr = TDB_ATTRIBUTE_HASH;
 		ok1(tdb_get_attribute(tdb, &attr) == 0);
 		ok1(attr.base.attr == TDB_ATTRIBUTE_HASH);
-		ok1(attr.hash.fn == jenkins_hash);
+		ok1(attr.hash.fn == tdb_jenkins_hash);
 		attr.base.attr = TDB_ATTRIBUTE_FLOCK;
 		ok1(tdb_get_attribute(tdb, &attr) == 0);
 		ok1(attr.base.attr == TDB_ATTRIBUTE_FLOCK);