1 /* $NetBSD: byteorder.c,v 1.2 2001/10/31 20:19:52 thorpej Exp $ */
2
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include "byteorder.h"
39
40 typedef union {
41 uint16_t val;
42 uint8_t bytes[2];
43 } un16;
44
45 typedef union {
46 uint32_t val;
47 uint8_t bytes[4];
48 } un32;
49
50 typedef union {
51 uint64_t val;
52 uint32_t words[2];
53 } un64;
54
55 /* 16-bit */
56
57 uint16_t
58 sa_htobe16(uint16_t val)
59 {
60 un16 un;
61
62 un.bytes[1] = val & 0xff;
63 un.bytes[0] = (val >> 8) & 0xff;
64
65 return (un.val);
66 }
67
68 uint16_t
69 sa_htole16(uint16_t val)
70 {
71 un16 un;
72
73 un.bytes[0] = val & 0xff;
74 un.bytes[1] = (val >> 8) & 0xff;
75
76 return (un.val);
77 }
78
79 uint16_t
80 sa_be16toh(uint16_t val)
81 {
82 un16 un;
83
84 un.val = val;
85
86 return ((un.bytes[0] << 8) |
87 un.bytes[1]);
88 }
89
90 uint16_t
91 sa_le16toh(uint16_t val)
92 {
93 un16 un;
94
95 un.val = val;
96
97 return ((un.bytes[1] << 8) |
98 un.bytes[0]);
99 }
100
101 /* 32-bit */
102
103 uint32_t
104 sa_htobe32(uint32_t val)
105 {
106 un32 un;
107
108 un.bytes[3] = val & 0xff;
109 un.bytes[2] = (val >> 8) & 0xff;
110 un.bytes[1] = (val >> 16) & 0xff;
111 un.bytes[0] = (val >> 24) & 0xff;
112
113 return (un.val);
114 }
115
116 uint32_t
117 sa_htole32(uint32_t val)
118 {
119 un32 un;
120
121 un.bytes[0] = val & 0xff;
122 un.bytes[1] = (val >> 8) & 0xff;
123 un.bytes[2] = (val >> 16) & 0xff;
124 un.bytes[3] = (val >> 24) & 0xff;
125
126 return (un.val);
127 }
128
129 uint32_t
130 sa_be32toh(uint32_t val)
131 {
132 un32 un;
133
134 un.val = val;
135
136 return ((un.bytes[0] << 24) |
137 (un.bytes[1] << 16) |
138 (un.bytes[2] << 8) |
139 un.bytes[3]);
140 }
141
142 uint32_t
143 sa_le32toh(uint32_t val)
144 {
145 un32 un;
146
147 un.val = val;
148
149 return ((un.bytes[3] << 24) |
150 (un.bytes[2] << 16) |
151 (un.bytes[1] << 8) |
152 un.bytes[0]);
153 }
154
155 /* 64-bit */
156
157 uint64_t
158 sa_htobe64(uint64_t val)
159 {
160 un64 un;
161
162 un.words[BE64_HI] = sa_htobe32(val >> 32);
163 un.words[BE64_LO] = sa_htobe32(val & 0xffffffffU);
164
165 return (un.val);
166 }
167
168 uint64_t
169 sa_htole64(uint64_t val)
170 {
171 un64 un;
172
173 un.words[LE64_HI] = sa_htole32(val >> 32);
174 un.words[LE64_LO] = sa_htole32(val & 0xffffffffU);
175
176 return (un.val);
177 }
178
179 uint64_t
180 sa_be64toh(uint64_t val)
181 {
182 un64 un;
183 uint64_t rv;
184
185 un.val = val;
186 un.words[BE64_HI] = sa_be32toh(un.words[BE64_HI]);
187 un.words[BE64_LO] = sa_be32toh(un.words[BE64_LO]);
188
189 rv = (((uint64_t)un.words[BE64_HI]) << 32) |
190 un.words[BE64_LO];
191
192 return (rv);
193 }
194
195 uint64_t
196 sa_le64toh(uint64_t val)
197 {
198 un64 un;
199 uint64_t rv;
200
201 un.val = val;
202 un.words[LE64_HI] = sa_le32toh(un.words[LE64_HI]);
203 un.words[LE64_LO] = sa_le32toh(un.words[LE64_LO]);
204
205 rv = (((uint64_t)un.words[LE64_HI]) << 32) |
206 un.words[LE64_LO];
207
208 return (rv);
209 }
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