1 /* $OpenBSD: uuid_equal.c,v 1.2 2015/09/10 18:13:46 guenther Exp $ */
2 /* $NetBSD: uuid_equal.c,v 1.2 2008/04/23 07:52:32 plunky Exp $ */
3
4 /*
5 * Copyright (c) 2002 Marcel Moolenaar
6 * Copyright (c) 2002 Hiten Mahesh Pandya
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD: src/lib/libc/uuid/uuid_equal.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
31 */
32
33 #include <string.h>
34 #include <uuid.h>
35
36 /*
37 * uuid_equal() - compare for equality.
38 * See also:
39 * http://www.opengroup.org/onlinepubs/009629399/uuid_equal.htm
40 */
41 int32_t
uuid_equal(const uuid_t * a,const uuid_t * b,uint32_t * status)42 uuid_equal(const uuid_t *a, const uuid_t *b, uint32_t *status)
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