pipewire/pipewire-jack/src/uuid.c

/* PipeWire
 *
 * Copyright © 2018 Wim Taymans
 *
 * 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 (including the next
 * paragraph) 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.
 */

#include "config.h"

#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>

#include <jack/uuid.h>

#include <pipewire/pipewire.h>

SPA_EXPORT
jack_uuid_t jack_client_uuid_generate ()
{
	static uint32_t uuid_cnt = 0;
	jack_uuid_t uuid = 0x2; /* JackUUIDClient */;
	uuid = (uuid << 32) | ++uuid_cnt;
	pw_log_debug("uuid %"PRIu64, uuid);
	return uuid;
}

SPA_EXPORT
jack_uuid_t jack_port_uuid_generate (uint32_t port_id)
{
	jack_uuid_t uuid = 0x1; /* JackUUIDPort */
	uuid = (uuid << 32) | (port_id + 1);
	pw_log_debug("uuid %d -> %"PRIu64, port_id, uuid);
	return uuid;
}

SPA_EXPORT
uint32_t jack_uuid_to_index (jack_uuid_t id)
{
	return (id & 0xffffff) - 1;
}

SPA_EXPORT
int  jack_uuid_compare (jack_uuid_t id1, jack_uuid_t id2)
{
	if (id1 == id2)
		return 0;
	if (id1 < id2)
		return -1;
	return 1;
}

SPA_EXPORT
void jack_uuid_copy (jack_uuid_t* dst, jack_uuid_t src)
{
	spa_return_if_fail(dst != NULL);
	*dst = src;
}

SPA_EXPORT
void jack_uuid_clear (jack_uuid_t *id)
{
	spa_return_if_fail(id != NULL);
	*id = 0;
}

SPA_EXPORT
int  jack_uuid_parse (const char *buf, jack_uuid_t *id)
{
	spa_return_val_if_fail(buf != NULL, -EINVAL);
	spa_return_val_if_fail(id != NULL, -EINVAL);

	if (sscanf (buf, "%" PRIu64, id) == 1) {
		if (*id < (0x1LL << 32)) {
			/* has not type bits set - not legal */
			return -1;
		}
		return 0;
	}
	return -1;
}

SPA_EXPORT
void jack_uuid_unparse (jack_uuid_t id, char buf[JACK_UUID_STRING_SIZE])
{
	spa_return_if_fail(buf != NULL);
	snprintf (buf, JACK_UUID_STRING_SIZE, "%" PRIu64, id);
}

SPA_EXPORT
int  jack_uuid_empty (jack_uuid_t id)
{
	return id == 0;
}