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/* $OpenBSD: uuid_from_string.c,v 1.2 2015/09/10 18:13:46 guenther Exp $ */
/* $NetBSD: uuid_from_string.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $ */
/*
* Copyright (c) 2002 Marcel Moolenaar
* Copyright (c) 2002 Hiten Mahesh Pandya
* All rights reserved.
*
* 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, this list of conditions and the following disclaimer.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 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 ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/lib/libc/uuid/uuid_from_string.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
*/
#include <stdio.h>
#include <string.h>
#include <uuid.h>
/*
* uuid_from_string() - convert a string representation of an UUID into
* a binary representation.
* See also:
* http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm
*
* NOTE: The sequence field is in big-endian, while the time fields are in
* native byte order.
*/
void
uuid_from_string(const char *s, uuid_t *u, uint32_t *status)
{
int n;
/* Short-circuit 2 special cases: NULL pointer and empty string. */
if (s == NULL || *s == '\0') {
uuid_create_nil(u, status);
return;
}
/* Assume the worst. */
if (status != NULL)
*status = uuid_s_invalid_string_uuid;
/* The UUID string representation has a fixed length. */
if (strlen(s) != UUID_STR_LEN)
return;
/*
* We only work with "new" UUIDs. New UUIDs have the form:
* 01234567-89ab-cdef-0123-456789abcdef
* The so called "old" UUIDs, which we don't support, have the form:
* 0123456789ab.cd.ef.01.23.45.67.89.ab
*/
if (s[8] != '-')
return;
n = sscanf(s,
"%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx",
&u->time_low, &u->time_mid, &u->time_hi_and_version,
&u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0],
&u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]);
/* Make sure we have all conversions. */
if (n != 11)
return;
/* We have a successful scan. Check semantics... */
n = u->clock_seq_hi_and_reserved;
if ((n & 0x80) != 0x00 && /* variant 0? */
(n & 0xc0) != 0x80 && /* variant 1? */
(n & 0xe0) != 0xc0) { /* variant 2? */
if (status != NULL)
*status = uuid_s_bad_version;
} else {
if (status != NULL)
*status = uuid_s_ok;
}
}
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