1 /* $OpenBSD: uuid_to_string.c,v 1.2 2015/09/10 18:13:46 guenther Exp $ */
2 /* $NetBSD: uuid_to_string.c,v 1.2 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_to_string.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
31 */
32
33 #include <stdio.h>
34 #include <string.h>
35 #include <uuid.h>
36
37 /*
38 * uuid_to_string() - Convert a binary UUID into a string representation.
39 * See also:
40 * http://www.opengroup.org/onlinepubs/009629399/uuid_to_string.htm
41 *
42 * NOTE: The references given above do not have a status code for when
43 * the string could not be allocated. The status code has been
44 * taken from the Hewlett-Packard implementation.
45 */
46 void
uuid_to_string(const uuid_t * u,char ** s,uint32_t * status)47 uuid_to_string(const uuid_t *u, char **s, uint32_t *status)
48 {
49 int c;
50 static const uuid_t nil = { .time_low = 0 };
51
52 if (status != NULL)
53 *status = uuid_s_ok;
54
55 /* Why allow a NULL-pointer here? */
56 if (s == NULL)
57 return;
58
59 if (u == NULL)
60 u = &nil;
61
62 c = asprintf(s, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
63 u->time_low, u->time_mid, u->time_hi_and_version,
64 u->clock_seq_hi_and_reserved, u->clock_seq_low, u->node[0],
65 u->node[1], u->node[2], u->node[3], u->node[4], u->node[5]);
66
67 if (c == -1 && status != NULL)
68 *status = uuid_s_no_memory;
69 }
70