1 /*-
2 * Copyright (c) 2002,2005 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 * $FreeBSD$
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 */
38 int32_t
uuid_equal(const uuid_t * a,const uuid_t * b,uint32_t * status)39 uuid_equal(const uuid_t *a, const uuid_t *b, uint32_t *status)
40 {
41
42 if (status != NULL)
43 *status = uuid_s_ok;
44
45 /* Deal with equal or NULL pointers. */
46 if (a == b)
47 return (1);
48 if (a == NULL)
49 return (uuid_is_nil(b, NULL));
50 if (b == NULL)
51 return (uuid_is_nil(a, NULL));
52
53 /* Do a byte for byte comparison. */
54 return ((memcmp(a, b, sizeof(uuid_t))) ? 0 : 1);
55 }
56