2 * Copyright (c) 2002 Marcel Moolenaar
3 * Copyright (c) 2002 Hiten Mahesh Pandya
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * uuid_from_string() - convert a string representation of an UUID into
36 * a binary representation.
38 * http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm
40 * NOTE: The sequence field is in big-endian, while the time fields are in
44 uuid_from_string(const char *s, uuid_t *u, uint32_t *status)
48 /* Short-circuit 2 special cases: NULL pointer and empty string. */
49 if (s == NULL || *s == '\0') {
50 uuid_create_nil(u, status);
54 /* Assume the worst. */
56 *status = uuid_s_invalid_string_uuid;
58 /* The UUID string representation has a fixed length. */
63 * We only work with "new" UUIDs. New UUIDs have the form:
64 * 01234567-89ab-cdef-0123-456789abcdef
65 * The so called "old" UUIDs, which we don't support, have the form:
66 * 0123456789ab.cd.ef.01.23.45.67.89.ab
72 "%8x-%4hx-%4hx-%2hhx%2hhx-%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx",
73 &u->time_low, &u->time_mid, &u->time_hi_and_version,
74 &u->clock_seq_hi_and_reserved, &u->clock_seq_low, &u->node[0],
75 &u->node[1], &u->node[2], &u->node[3], &u->node[4], &u->node[5]);
77 /* Make sure we have all conversions. */
81 /* We have a successful scan. Check semantics... */
82 n = u->clock_seq_hi_and_reserved;
83 if ((n & 0x80) != 0x00 && /* variant 0? */
84 (n & 0xc0) != 0x80 && /* variant 1? */
85 (n & 0xe0) != 0xc0) { /* variant 2? */
87 *status = uuid_s_bad_version;