[lttng-tools.git] / src / common / compat / uuid.h

/*
 * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#ifndef LTTNG_UUID_H
#define LTTNG_UUID_H

#include <common/macros.h>

/*
 * Includes final \0.
 */
#define UUID_STR_LEN		37
#define UUID_LEN		16

#ifdef LTTNG_HAVE_LIBUUID
#include <uuid/uuid.h>

/*
 * uuid_out is of len UUID_LEN.
 */
static inline
int lttng_uuid_generate(unsigned char *uuid_out)
{
	uuid_generate(uuid_out);
	return 0;
}

#elif defined(LTTNG_HAVE_LIBC_UUID)
#include <uuid.h>
#include <stdint.h>

/*
 * uuid_out is of len UUID_LEN.
 */
static inline
int lttng_uuid_generate(unsigned char *uuid_out)
{
	uint32_t status;

	uuid_create((uuid_t *) uuid_out, &status);
	if (status == uuid_s_ok)
		return 0;
	else
		return -1;
}

#else
#error "LTTng-Tools needs to have a UUID generator configured."
#endif

/*
 * Convert a UUID to a human-readable, NULL-terminated, string of the form
 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
 *
 * Assumes uuid_str is at least UUID_STR_LEN byte long.
 */
LTTNG_HIDDEN
void lttng_uuid_to_str(const unsigned char *uuid, char *uuid_str);

#endif /* LTTNG_UUID_H */
Commit	Line	Data
ffe60014 DG	1	/*
	2	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
	5	* of this software and associated documentation files (the "Software"), to
	6	* deal in the Software without restriction, including without limitation the
	7	* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
	8	* sell copies of the Software, and to permit persons to whom the Software is
	9	* furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	19	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	20	* IN THE SOFTWARE.
	21	*/
	22
	23	#ifndef LTTNG_UUID_H
	24	#define LTTNG_UUID_H
	25
bef4c7a1 JG	26	#include <common/macros.h>
bef4c7a1 JG	27
ffe60014 DG	28	/*
	29	* Includes final \0.
	30	*/
	31	#define UUID_STR_LEN 37
d0b96690	32	#define UUID_LEN 16
ffe60014 DG	33
	34	#ifdef LTTNG_HAVE_LIBUUID
	35	#include <uuid/uuid.h>
	36
d0b96690 DG	37	/*
	38	* uuid_out is of len UUID_LEN.
	39	*/
ffe60014 DG	40	static inline
	41	int lttng_uuid_generate(unsigned char *uuid_out)
	42	{
	43	uuid_generate(uuid_out);
	44	return 0;
	45	}
	46
	47	#elif defined(LTTNG_HAVE_LIBC_UUID)
	48	#include <uuid.h>
	49	#include <stdint.h>
	50
d0b96690 DG	51	/*
	52	* uuid_out is of len UUID_LEN.
	53	*/
ffe60014 DG	54	static inline
	55	int lttng_uuid_generate(unsigned char *uuid_out)
	56	{
	57	uint32_t status;
	58
	59	uuid_create((uuid_t *) uuid_out, &status);
	60	if (status == uuid_s_ok)
	61	return 0;
	62	else
	63	return -1;
	64	}
	65
	66	#else
	67	#error "LTTng-Tools needs to have a UUID generator configured."
	68	#endif
	69
bef4c7a1 JG	70	/*
	71	* Convert a UUID to a human-readable, NULL-terminated, string of the form
	72	* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
	73	*
	74	* Assumes uuid_str is at least UUID_STR_LEN byte long.
	75	*/
	76	LTTNG_HIDDEN
	77	void lttng_uuid_to_str(const unsigned char uuid, char uuid_str);
	78
ffe60014	79	#endif /* LTTNG_UUID_H */