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      1 /*	$NetBSD: uuid_to_string.c,v 1.2 2008/04/23 07:52:32 plunky Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 Marcel Moolenaar
      5  * Copyright (c) 2002 Hiten Mahesh Pandya
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     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  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  *
     29  * $FreeBSD: src/lib/libc/uuid/uuid_to_string.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 __RCSID("$NetBSD: uuid_to_string.c,v 1.2 2008/04/23 07:52:32 plunky Exp $");
     35 #endif
     36 
     37 #include "namespace.h"
     38 
     39 #include <stdio.h>
     40 #include <string.h>
     41 #include <uuid.h>
     42 
     43 /*
     44  * uuid_to_string() - Convert a binary UUID into a string representation.
     45  * See also:
     46  *	http://www.opengroup.org/onlinepubs/009629399/uuid_to_string.htm
     47  *
     48  * NOTE: The references given above do not have a status code for when
     49  *	 the string could not be allocated. The status code has been
     50  *	 taken from the Hewlett-Packard implementation.
     51  */
     52 void
     53 uuid_to_string(const uuid_t *u, char **s, uint32_t *status)
     54 {
     55 	static const uuid_t nil = { .time_low = 0 };
     56 
     57 	if (status != NULL)
     58 		*status = uuid_s_ok;
     59 
     60 	/* Why allow a NULL-pointer here? */
     61 	if (s == 0)
     62 		return;
     63 
     64 	if (u == NULL)
     65 		u = &nil;
     66 
     67 	asprintf(s, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
     68 	    u->time_low, u->time_mid, u->time_hi_and_version,
     69 	    u->clock_seq_hi_and_reserved, u->clock_seq_low, u->node[0],
     70 	    u->node[1], u->node[2], u->node[3], u->node[4], u->node[5]);
     71 
     72 	if (*s == NULL && status != NULL)
     73 		*status = uuid_s_no_memory;
     74 }
     75