uuid_equal.c revision 106184 
1/*-
2 * Copyright (c) 2002 Marcel Moolenaar
3 * Copyright (c) 2002 Hiten Mahesh Pandya
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: head/lib/libc/uuid/uuid_equal.c 106184 2002-10-30 03:51:00Z marcel $
28 */
29
30#include <string.h>
31#include <uuid.h>
32
33/*
34 * uuid_equal() - compare for equality.
35 * See also:
36 *	http://www.opengroup.org/onlinepubs/009629399/uuid_equal.htm
37 *	http://www.transarc.ibm.com/Library/documentation/dce/1.1/uuid_equal.html
38 */
39int32_t
40uuid_equal(uuid_t *a, uuid_t *b, uint32_t *status)
41{
42
43	if (status != NULL)
44		*status = uuid_s_ok;
45
46	/* Deal with equal or NULL pointers. */
47	if (a == b)
48		return (1);
49	if (a == NULL)
50		return (uuid_is_nil(b, NULL));
51	if (b == NULL)
52		return (uuid_is_nil(a, NULL));
53
54	/* Do a byte for byte comparison. */
55	return ((memcmp(a, b, sizeof(uuid_t))) ? 0 : 1);
56}
57