1  /*
       2   * parse.c --- UUID parsing
       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 <stdlib.h>
      36  #include <stdio.h>
      37  #include <ctype.h>
      38  #include <string.h>
      39  
      40  #include "c.h"
      41  #include "uuidP.h"
      42  
      43  int uuid_parse(const char *in, uuid_t uu)
      44  {
      45  	size_t len = strlen(in);
      46  	if (len != 36)
      47  		return -1;
      48  
      49  	return uuid_parse_range(in, in + len, uu);
      50  }
      51  
      52  int uuid_parse_range(const char *in_start, const char *in_end, uuid_t uu)
      53  {
      54  	struct uuid	uuid;
      55  	int		i;
      56  	const char	*cp;
      57  	char		buf[3];
      58  
      59  	if ((in_end - in_start) != 36)
      60  		return -1;
      61  	for (i=0, cp = in_start; i < 36; i++,cp++) {
      62  		if ((i == 8) || (i == 13) || (i == 18) ||
      63  		    (i == 23)) {
      64  			if (*cp == '-')
      65  				continue;
      66  			return -1;
      67  		}
      68  
      69  		if (!isxdigit(*cp))
      70  			return -1;
      71  	}
      72  	errno = 0;
      73  	uuid.time_low = strtoul(in_start, NULL, 16);
      74  
      75  	if (!errno)
      76  		uuid.time_mid = strtoul(in_start+9, NULL, 16);
      77  	if (!errno)
      78  		uuid.time_hi_and_version = strtoul(in_start+14, NULL, 16);
      79  	if (!errno)
      80  		uuid.clock_seq = strtoul(in_start+19, NULL, 16);
      81  	if (errno)
      82  		return -1;
      83  
      84  	cp = in_start+24;
      85  	buf[2] = 0;
      86  	for (i=0; i < 6; i++) {
      87  		buf[0] = *cp++;
      88  		buf[1] = *cp++;
      89  
      90  		errno = 0;
      91  		uuid.node[i] = strtoul(buf, NULL, 16);
      92  		if (errno)
      93  			return -1;
      94  	}
      95  
      96  	uuid_pack(&uuid, uu);
      97  	return 0;
      98  }