1 /* $NetBSD: uuid_is_nil.c,v 1.4 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_is_nil.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_is_nil.c,v 1.4 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 #ifdef __weak_alias
__weak_alias(uuid_is_nil,_uuid_is_nil)43 __weak_alias(uuid_is_nil,_uuid_is_nil)
44 #endif
45
46 /*
47 * uuid_is_nil() - return whether the UUID is a nil UUID.
48 * See also:
49 * http://www.opengroup.org/onlinepubs/009629399/uuid_is_nil.htm
50 */
51 int32_t
52 uuid_is_nil(const uuid_t *u, uint32_t *status)
53 {
54 static const uuid_t nil = { .time_low = 0 };
55
56 if (status)
57 *status = uuid_s_ok;
58
59 if (!u)
60 return (1);
61
62 return (memcmp(u, &nil, sizeof(uuid_t)) == 0 ? 1 : 0);
63 }
64