unpack.c revision 18a1444b4f1e6a0948fd38fa0de382d86cfe04de 
1/*
2 * Internal routine for unpacking UUID
3 *
4 * Copyright (C) 1996, 1997 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, and the entire permission notice in its entirety,
12 *    including the disclaimer of warranties.
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 * 3. The name of the author may not be used to endorse or promote
17 *    products derived from this software without specific prior
18 *    written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
23 * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
27 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
30 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
31 * DAMAGE.
32 * %End-Header%
33 */
34
35#include <string.h>
36#include "uuidP.h"
37
38void uuid_unpack(const uuid_t in, struct uuid *uu)
39{
40	const uint8_t	*ptr = in;
41	uint32_t		tmp;
42
43	tmp = *ptr++;
44	tmp = (tmp << 8) | *ptr++;
45	tmp = (tmp << 8) | *ptr++;
46	tmp = (tmp << 8) | *ptr++;
47	uu->time_low = tmp;
48
49	tmp = *ptr++;
50	tmp = (tmp << 8) | *ptr++;
51	uu->time_mid = tmp;
52
53	tmp = *ptr++;
54	tmp = (tmp << 8) | *ptr++;
55	uu->time_hi_and_version = tmp;
56
57	tmp = *ptr++;
58	tmp = (tmp << 8) | *ptr++;
59	uu->clock_seq = tmp;
60
61	memcpy(uu->node, ptr, 6);
62}
63
64