2 * Copyright (c) 2015 M. Warner Losh <imp@FreeBSD.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * Note: some comments taken from lib/libc/uuid/uuid_from_string.c
30 * Copyright (c) 2002 Marcel Moolenaar
31 * Copyright (c) 2002 Hiten Mahesh Pandya
41 if (ch >= '0' && ch <= '9')
43 if (ch >= 'a' && ch <= 'f')
45 if (ch >= 'A' && ch <= 'F')
51 fromhex(const char *s, int len, int *ok)
59 for (i = 0; i < len; i++) {
71 * uuid_from_string() - convert a string representation of an UUID into
72 * a binary representation.
74 * http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm
76 * NOTE: The sequence field is in big-endian, while the time fields are in
79 * 01234567-89ab-cdef-0123-456789abcdef
80 * 000000000011111111112222222222333333
81 * 012345678901234567890123456789012345
83 * hhhhhhhh-hhhh-hhhh-bbbb-bbbbbbbbbbbb
87 uuid_from_string(const char *s, uuid_t *u, uint32_t *status)
92 if (s == NULL || *s == '\0') {
93 uuid_create_nil(u, status);
98 *status = uuid_s_invalid_string_uuid;
101 /* Only support new format, check for all the right dashes */
102 if (s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-')
104 /* native byte order */
105 u->time_low = fromhex(s , 8, &ok);
106 u->time_mid = fromhex(s + 9, 4, &ok);
107 u->time_hi_and_version = fromhex(s + 14, 4, &ok);
108 /* Big endian, but presented as a whole number so decode as such */
109 u->clock_seq_hi_and_reserved = fromhex(s + 19, 2, &ok);
110 u->clock_seq_low = fromhex(s + 21, 2, &ok);
111 u->node[0] = fromhex(s + 24, 2, &ok);
112 u->node[1] = fromhex(s + 26, 2, &ok);
113 u->node[2] = fromhex(s + 28, 2, &ok);
114 u->node[3] = fromhex(s + 30, 2, &ok);
115 u->node[4] = fromhex(s + 32, 2, &ok);
116 u->node[5] = fromhex(s + 34, 2, &ok);
120 /* We have a successful scan. Check semantics... */
121 n = u->clock_seq_hi_and_reserved;
122 if ((n & 0x80) != 0x00 && /* variant 0? */
123 (n & 0xc0) != 0x80 && /* variant 1? */
124 (n & 0xe0) != 0xc0) { /* variant 2? */
126 *status = uuid_s_bad_version;