1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002,2005 Marcel Moolenaar
5 * Copyright (c) 2002 Hiten Mahesh Pandya
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32 #include <string.h>
33 #include <uuid.h>
34
35 /*
36 * uuid_equal() - compare for equality.
37 * See also:
38 * http://www.opengroup.org/onlinepubs/009629399/uuid_equal.htm
39 */
40 int32_t
uuid_equal(const uuid_t * a,const uuid_t * b,uint32_t * status)41 uuid_equal(const uuid_t *a, const uuid_t *b, uint32_t *status)
42 {
43
44 if (status != NULL)
45 *status = uuid_s_ok;
46
47 /* Deal with equal or NULL pointers. */
48 if (a == b)
49 return (1);
50 if (a == NULL)
51 return (uuid_is_nil(b, NULL));
52 if (b == NULL)
53 return (uuid_is_nil(a, NULL));
54
55 /* Do a byte for byte comparison. */
56 return ((memcmp(a, b, sizeof(uuid_t))) ? 0 : 1);
57 }
58