uuid/unpack-uuid.c

   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
  38 void 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