/*

 * parse.c --- UUID parsing

 *

 * Copyright (C) 1996, 1997 Theodore Ts'o.

 *

 * %Begin-Header%

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, and the entire permission notice in its entirety,

 *    including the disclaimer of warranties.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote

 *    products derived from this software without specific prior

 *    written permission.

 *

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF

 * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT

 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE

 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH

 * DAMAGE.

 * %End-Header%

 */

#include <stdlib.h>

#include <stdio.h>

#include <ctype.h>

#include <string.h>

#include "c.h"

#include "uuidP.h"

int uuid_parse(const char *in, uuid_t uu)

{

  size_t len = strlen(in);

  if (len != 36)

    return -1;

  return uuid_parse_range(in, in + len, uu);

}

int uuid_parse_range(const char *in_start, const char *in_end, uuid_t uu)

{

  struct uuid uuid;

  int   i;

  const char  *cp;

  char    buf[3];

  if ((in_end - in_start) != 36)

    return -1;

  for (i=0, cp = in_start; i < 36; i++,cp++) {

    if ((i == 8) || (i == 13) || (i == 18) ||

        (i == 23)) {

      if (*cp == '-')

        continue;

      return -1;

    }

    if (!isxdigit(*cp))

      return -1;

  }

  errno = 0;

  uuid.time_low = strtoul(in_start, NULL, 16);

  if (!errno)

    uuid.time_mid = strtoul(in_start+9, NULL, 16);

  if (!errno)

    uuid.time_hi_and_version = strtoul(in_start+14, NULL, 16);

  if (!errno)

    uuid.clock_seq = strtoul(in_start+19, NULL, 16);

  if (errno)

    return -1;

  cp = in_start+24;

  buf[2] = 0;

  for (i=0; i < 6; i++) {

    buf[0] = *cp++;

    buf[1] = *cp++;

    errno = 0;

    uuid.node[i] = strtoul(buf, NULL, 16);

    if (errno)

      return -1;

  }

  uuid_pack(&uuid, uu);

  return 0;

}