libmisc/uuid/unpack.c

0001 /*
0002  * Internal routine for unpacking UUID
0003  *
0004  * Copyright (C) 1996, 1997 Theodore Ts'o.
0005  *
0006  * %Begin-Header%
0007  * Redistribution and use in source and binary forms, with or without
0008  * modification, are permitted provided that the following conditions
0009  * are met:
0010  * 1. Redistributions of source code must retain the above copyright
0011  *    notice, and the entire permission notice in its entirety,
0012  *    including the disclaimer of warranties.
0013  * 2. Redistributions in binary form must reproduce the above copyright
0014  *    notice, this list of conditions and the following disclaimer in the
0015  *    documentation and/or other materials provided with the distribution.
0016  * 3. The name of the author may not be used to endorse or promote
0017  *    products derived from this software without specific prior
0018  *    written permission.
0019  *
0020  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
0021  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
0022  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
0023  * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE
0024  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0025  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
0026  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
0027  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0028  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
0029  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
0030  * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
0031  * DAMAGE.
0032  * %End-Header%
0033  */
0034
0035 #ifdef HAVE_CONFIG_H
0036 #include "config.h"
0037 #endif
0038
0039 #include <string.h>
0040 #include "uuidP.h"
0041
0042 void uuid_unpack(const uuid_t in, struct uuid *uu)
0043 {
0044     const uint8_t   *ptr = in;
0045     uint32_t        tmp;
0046
0047     tmp = *ptr++;
0048     tmp = (tmp << 8) | *ptr++;
0049     tmp = (tmp << 8) | *ptr++;
0050     tmp = (tmp << 8) | *ptr++;
0051     uu->time_low = tmp;
0052
0053     tmp = *ptr++;
0054     tmp = (tmp << 8) | *ptr++;
0055     uu->time_mid = tmp;
0056
0057     tmp = *ptr++;
0058     tmp = (tmp << 8) | *ptr++;
0059     uu->time_hi_and_version = tmp;
0060
0061     tmp = *ptr++;
0062     tmp = (tmp << 8) | *ptr++;
0063     uu->clock_seq = tmp;
0064
0065     memcpy(uu->node, ptr, 6);
0066 }
0067