[apple/libc.git] / uuid / uuidsrc / unparse.c

/*
 * 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 const char *fmt_lower = 
	"0123456789abcdef";

static const char *fmt_upper = 
	"0123456789ABCDEF";

#ifdef UUID_UNPARSE_DEFAULT_UPPER
#define FMT_DEFAULT fmt_upper
#else
#define FMT_DEFAULT fmt_lower
#endif

static void uuid_unparse_x(const uuid_t uu, char *out, const char *fmt)
{
	const uint8_t *uuid_array = (const uint8_t *)uu;
	int uuid_index;
	
	for ( uuid_index = 0; uuid_index < sizeof(uuid_t); ++uuid_index ) {
		// insert '-' after the 4th, 6th, 8th, and 10th uuid byte
		switch (uuid_index) {
		case 4:
		case 6:
		case 8:
		case 10:
			*out++ = '-';
			break;
		}
		// insert uuid byte as two hex characters
		*out++ = fmt[*uuid_array >> 4];
		*out++ = fmt[*uuid_array++ & 0xF];
	}
	*out = 0;
}

void uuid_unparse_lower(const uuid_t uu, char *out)
{
	uuid_unparse_x(uu, out,	fmt_lower);
}

void uuid_unparse_upper(const uuid_t uu, char *out)
{
	uuid_unparse_x(uu, out,	fmt_upper);
}

void uuid_unparse(const uuid_t uu, char *out)
{
	uuid_unparse_x(uu, out, FMT_DEFAULT);
}
Commit	Line	Data
59e0d9fe A	1	/*
	2	* unparse.c -- convert a UUID to string
	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 <stdio.h>
	36
	37	#include "uuidP.h"
	38
	39	static const char *fmt_lower =
ad3c9f2a	40	"0123456789abcdef";
59e0d9fe A	41
59e0d9fe A	42	static const char *fmt_upper =
ad3c9f2a	43	"0123456789ABCDEF";
59e0d9fe A	44
	45	#ifdef UUID_UNPARSE_DEFAULT_UPPER
	46	#define FMT_DEFAULT fmt_upper
	47	#else
	48	#define FMT_DEFAULT fmt_lower
	49	#endif
	50
	51	static void uuid_unparse_x(const uuid_t uu, char out, const char fmt)
	52	{
ad3c9f2a A	53	const uint8_t uuid_array = (const uint8_t )uu;
	54	int uuid_index;
	55
	56	for ( uuid_index = 0; uuid_index < sizeof(uuid_t); ++uuid_index ) {
	57	// insert '-' after the 4th, 6th, 8th, and 10th uuid byte
	58	switch (uuid_index) {
	59	case 4:
	60	case 6:
	61	case 8:
	62	case 10:
	63	*out++ = '-';
	64	break;
	65	}
	66	// insert uuid byte as two hex characters
	67	out++ = fmt[uuid_array >> 4];
	68	out++ = fmt[uuid_array++ & 0xF];
	69	}
	70	*out = 0;
59e0d9fe A	71	}
	72
	73	void uuid_unparse_lower(const uuid_t uu, char *out)
	74	{
	75	uuid_unparse_x(uu, out, fmt_lower);
	76	}
	77
	78	void uuid_unparse_upper(const uuid_t uu, char *out)
	79	{
	80	uuid_unparse_x(uu, out, fmt_upper);
	81	}
	82
	83	void uuid_unparse(const uuid_t uu, char *out)
	84	{
	85	uuid_unparse_x(uu, out, FMT_DEFAULT);
	86	}