lib/libc/uuid/uuid_stream.c

   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 }