1 /* $OpenBSD: uuid_is_nil.c,v 1.3 2015/09/13 11:36:16 guenther Exp $ */ 2 /* $NetBSD: uuid_is_nil.c,v 1.4 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_is_nil.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_is_nil() - return whether the UUID is a nil UUID. 38 * See also: 39 * http://www.opengroup.org/onlinepubs/009629399/uuid_is_nil.htm 40 */ 41 int32_t 42 uuid_is_nil(const uuid_t *u, uint32_t *status) 43 { 44 static const uuid_t nil = { .time_low = 0 }; 45 46 if (status) 47 *status = uuid_s_ok; 48 49 if (!u) 50 return (1); 51 52 return (memcmp(u, &nil, sizeof(uuid_t)) == 0 ? 1 : 0); 53 } 54 DEF_WEAK(uuid_is_nil); 55