/*

 * unparse.c -- convert a UUID to string

 *

 * 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 <stdio.h>

#include "c.h"

#include "uuidP.h"

static char const hexdigits_lower[16] = "0123456789abcdef";

static char const hexdigits_upper[16] = "0123456789ABCDEF";

static void uuid_fmt(const uuid_t uuid, char *buf, char const *restrict fmt)

{

  char *p = buf;

  int i;

  for (i = 0; i < 16; i++) {

    if (i == 4 || i == 6 || i == 8 || i == 10) {

      *p++ = '-';

    }

    size_t tmp = uuid[i];

    *p++ = fmt[tmp >> 4];

    *p++ = fmt[tmp & 15];

  }

  *p = '\0';

}

void uuid_unparse_lower(const uuid_t uu, char *out)

{

  uuid_fmt(uu, out, hexdigits_lower);

}

void uuid_unparse_upper(const uuid_t uu, char *out)

{

  uuid_fmt(uu, out, hexdigits_upper);

}

void uuid_unparse(const uuid_t uu, char *out)

{

#ifdef UUID_UNPARSE_DEFAULT_UPPER

  uuid_fmt(uu, out, hexdigits_upper);

#else

  uuid_fmt(uu, out, hexdigits_lower);

#endif

}