1 /* $NetBSD: uuid.h,v 1.4 2021/12/19 11:38:04 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LINUX_UUID_H_
33 #define _LINUX_UUID_H_
34
35 typedef struct {
36 unsigned char guid_bytes[16];
37 } guid_t;
38
39 #define GUID_INIT(x, y, z, v0, v1, v2, v3, v4, v5, v6, v7) ((guid_t) \
40 { \
41 .guid_bytes = { \
42 [0] = (x) & 0xff, \
43 [1] = ((x) >> 8) & 0xff, \
44 [2] = ((x) >> 16) & 0xff, \
45 [3] = ((x) >> 24) & 0xff, \
46 [4] = (y) & 0xff, \
47 [5] = ((y) >> 8) & 0xff, \
48 [6] = (z) & 0xff, \
49 [7] = ((z) >> 8) & 0xff, \
50 [8] = (v0), \
51 [9] = (v1), \
52 [10] = (v2), \
53 [11] = (v3), \
54 [12] = (v4), \
55 [13] = (v5), \
56 [14] = (v6), \
57 [15] = (v7), \
58 } \
59 })
60
61 #define UUID_STRING_LEN 36
62
63 static inline int
uuid_is_valid(const char uuid[static36])64 uuid_is_valid(const char uuid[static 36])
65 {
66 unsigned i;
67
68 for (i = 0; i < 36; i++) {
69 switch (i) {
70 case 8: /* xxxxxxxx[-]xxxx-xxxx-xxxx-xxxxxxxxxxxx */
71 case 12 + 1: /* xxxxxxxx-xxxx[-]xxxx-xxxx-xxxxxxxxxxxx */
72 case 16 + 2: /* xxxxxxxx-xxxx-xxxx[-]xxxx-xxxxxxxxxxxx */
73 case 20 + 3: /* xxxxxxxx-xxxx-xxxx-xxxx[-]xxxxxxxxxxxx */
74 if (uuid[i] == '-')
75 continue;
76 return 0;
77 default:
78 if ('0' <= uuid[i] && uuid[i] <= '9')
79 continue;
80 if ('a' <= uuid[i] && uuid[i] <= 'f')
81 continue;
82 if ('A' <= uuid[i] && uuid[i] <= 'F')
83 continue;
84 return 0;
85 }
86 }
87
88 return 1;
89 }
90
91 #endif /* _LINUX_UUID_H_ */
92