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      1 /*	$NetBSD: uuid_stream.c,v 1.3 2008/04/19 18:21:38 plunky Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002 Marcel Moolenaar
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  *
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #if defined(LIBC_SCCS) && !defined(lint)
     31 __RCSID("$NetBSD: uuid_stream.c,v 1.3 2008/04/19 18:21:38 plunky Exp $");
     32 #endif
     33 
     34 #include "namespace.h"
     35 
     36 #include <machine/endian.h>
     37 #include <uuid.h>
     38 
     39 /*
     40  * Encode/Decode UUID into octet-stream.
     41  *   http://www.opengroup.org/dce/info/draft-leach-uuids-guids-01.txt
     42  *
     43  * 0                   1                   2                   3
     44  *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     45  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     46  *  |                          time_low                             |
     47  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     48  *  |       time_mid                |         time_hi_and_version   |
     49  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     50  *  |clk_seq_hi_res |  clk_seq_low  |         node (0-1)            |
     51  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     52  *  |                         node (2-5)                            |
     53  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     54  *
     55  * NOTE: These routines are not part of the DCE RPC API.  There are
     56  * provided for convenience.
     57  */
     58 
     59 void
     60 uuid_enc_le(void *buf, const uuid_t *uuid)
     61 {
     62 	uint8_t *p = buf;
     63 	int i;
     64 
     65 	le32enc(p, uuid->time_low);
     66 	le16enc(p + 4, uuid->time_mid);
     67 	le16enc(p + 6, uuid->time_hi_and_version);
     68 	p[8] = uuid->clock_seq_hi_and_reserved;
     69 	p[9] = uuid->clock_seq_low;
     70 	for (i = 0; i < _UUID_NODE_LEN; i++)
     71 		p[10 + i] = uuid->node[i];
     72 }
     73 
     74 void
     75 uuid_dec_le(const void *buf, uuid_t *uuid)
     76 {
     77 	const uint8_t *p = buf;
     78 	int i;
     79 
     80 	uuid->time_low = le32dec(p);
     81 	uuid->time_mid = le16dec(p + 4);
     82 	uuid->time_hi_and_version = le16dec(p + 6);
     83 	uuid->clock_seq_hi_and_reserved = p[8];
     84 	uuid->clock_seq_low = p[9];
     85 	for (i = 0; i < _UUID_NODE_LEN; i++)
     86 		uuid->node[i] = p[10 + i];
     87 }
     88 
     89 void
     90 uuid_enc_be(void *buf, const uuid_t *uuid)
     91 {
     92 	uint8_t *p = buf;
     93 	int i;
     94 
     95 	be32enc(p, uuid->time_low);
     96 	be16enc(p + 4, uuid->time_mid);
     97 	be16enc(p + 6, uuid->time_hi_and_version);
     98 	p[8] = uuid->clock_seq_hi_and_reserved;
     99 	p[9] = uuid->clock_seq_low;
    100 	for (i = 0; i < _UUID_NODE_LEN; i++)
    101 		p[10 + i] = uuid->node[i];
    102 }
    103 
    104 void
    105 uuid_dec_be(const void *buf, uuid_t *uuid)
    106 {
    107 	const uint8_t *p = buf;
    108 	int i;
    109 
    110 	uuid->time_low = be32dec(p);
    111 	uuid->time_mid = be16dec(p + 4);
    112 	uuid->time_hi_and_version = be16dec(p + 6);
    113 	uuid->clock_seq_hi_and_reserved = p[8];
    114 	uuid->clock_seq_low = p[9];
    115 	for (i = 0; i < _UUID_NODE_LEN; i++)
    116 		uuid->node[i] = p[10 + i];
    117 }
    118