-#ifndef _LTTNG_HASH_HELPER_H
-#define _LTTNG_HASH_HELPER_H
-
/*
- * lttng-hash-helper.h
- *
- * LTTng hash table helpers.
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * LTTng hash table helpers.
*/
+#ifndef _LTTNG_HASH_HELPER_H
+#define _LTTNG_HASH_HELPER_H
+
#include <assert.h>
+#include <stddef.h>
#include <stdint.h>
#include <urcu/compiler.h>
c ^= b; c -= rot(b, 24); \
}
-static inline __attribute__((unused))
+static inline
+uint32_t lttng_hash_u32(const uint32_t *k, size_t length, uint32_t initval)
+ __attribute__((unused));
+static inline
uint32_t lttng_hash_u32(
const uint32_t *k, /* the key, an array of uint32_t values */
size_t length, /* the length of the key, in uint32_ts */
/*----------------------------------- handle the last 3 uint32_t's */
switch (length) { /* all the case statements fall through */
- case 3: c += k[2];
- case 2: b += k[1];
+ case 3: c += k[2]; /* fall through */
+ case 2: b += k[1]; /* fall through */
case 1: a += k[0];
- final(a, b, c);
+ final(a, b, c); /* fall through */
case 0: /* case 0: nothing left to add */
break;
}