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