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/*
* 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 "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 fmt[restrict])
{
char *p = buf;
for (int 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
}
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