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      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
     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