release/src/router/busybox/e2fsprogs/uuid/unpack.c

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