1 /* $NetBSD: uuid_equal.c,v 1.2 2008/04/23 07:52:32 plunky Exp $ */
2
3 /*-
4 * Copyright (c) 2002 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: src/lib/libc/uuid/uuid_equal.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 __RCSID("$NetBSD: uuid_equal.c,v 1.2 2008/04/23 07:52:32 plunky Exp $");
35 #endif
36
37 #include "namespace.h"
38
39 #include <string.h>
40 #include <uuid.h>
41
42 /*
43 * uuid_equal() - compare for equality.
44 * See also:
45 * http://www.opengroup.org/onlinepubs/009629399/uuid_equal.htm
46 */
47 int32_t
uuid_equal(const uuid_t * a,const uuid_t * b,uint32_t * status)48 uuid_equal(const uuid_t *a, const uuid_t *b, uint32_t *status)
49 {
50
51 if (status != NULL)
52 *status = uuid_s_ok;
53
54 /* Deal with equal or NULL pointers. */
55 if (a == b)
56 return (1);
57 if (a == NULL)
58 return (uuid_is_nil(b, NULL));
59 if (b == NULL)
60 return (uuid_is_nil(a, NULL));
61
62 /* Do a byte for byte comparison. */
63 return ((memcmp(a, b, sizeof(uuid_t))) ? 0 : 1);
64 }
65