1 /*-
2 * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/sys/endian.h,v 1.6 2003/10/15 20:05:57 obrien Exp $
27 */
28 #ifndef _FBSD_COMPAT_SYS_ENDIAN_H_
29 #define _FBSD_COMPAT_SYS_ENDIAN_H_
30
31 #include <stdint.h>
32 #include <posix/endian.h>
33
34 #include <support/ByteOrder.h>
35
36 #include <sys/cdefs.h>
37 #include <sys/_types.h>
38 #include <machine/endian.h>
39
40 #define _BYTE_ORDER BYTE_ORDER
41 #define _LITTLE_ENDIAN LITTLE_ENDIAN
42 #define _BIG_ENDIAN BIG_ENDIAN
43
44 #define __bswap16(x) __swap_int16(x)
45 #define __bswap32(x) __swap_int32(x)
46 #define __bswap64(x) __swap_int64(x)
47
48 /*
49 * General byte order swapping functions.
50 */
51 #define bswap16(x) __bswap16(x)
52 #define bswap32(x) __bswap32(x)
53 #define bswap64(x) __bswap64(x)
54
55 /*
56 * Host to big endian, host to little endian, big endian to host, and little
57 * endian to host byte order functions as detailed in byteorder(9).
58 */
59 #if _BYTE_ORDER == _LITTLE_ENDIAN
60 #define htobe16(x) bswap16((x))
61 #define htobe32(x) bswap32((x))
62 #define htobe64(x) bswap64((x))
63 #define htole16(x) ((uint16_t)(x))
64 #define htole32(x) ((uint32_t)(x))
65 #define htole64(x) ((uint64_t)(x))
66
67 #define be16toh(x) bswap16((x))
68 #define be32toh(x) bswap32((x))
69 #define be64toh(x) bswap64((x))
70 #define le16toh(x) ((uint16_t)(x))
71 #define le32toh(x) ((uint32_t)(x))
72 #define le64toh(x) ((uint64_t)(x))
73 #else /* _BYTE_ORDER != _LITTLE_ENDIAN */
74 #define htobe16(x) ((uint16_t)(x))
75 #define htobe32(x) ((uint32_t)(x))
76 #define htobe64(x) ((uint64_t)(x))
77 #define htole16(x) bswap16((x))
78 #define htole32(x) bswap32((x))
79 #define htole64(x) bswap64((x))
80
81 #define be16toh(x) ((uint16_t)(x))
82 #define be32toh(x) ((uint32_t)(x))
83 #define be64toh(x) ((uint64_t)(x))
84 #define le16toh(x) bswap16((x))
85 #define le32toh(x) bswap32((x))
86 #define le64toh(x) bswap64((x))
87 #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
88
89 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
90
91 static __inline uint16_t
be16dec(const void * pp)92 be16dec(const void *pp)
93 {
94 unsigned char const *p = (unsigned char const *)pp;
95
96 return ((p[0] << 8) | p[1]);
97 }
98
99 static __inline uint32_t
be32dec(const void * pp)100 be32dec(const void *pp)
101 {
102 unsigned char const *p = (unsigned char const *)pp;
103
104 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
105 }
106
107 static __inline uint64_t
be64dec(const void * pp)108 be64dec(const void *pp)
109 {
110 unsigned char const *p = (unsigned char const *)pp;
111
112 return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
113 }
114
115 static __inline uint16_t
le16dec(const void * pp)116 le16dec(const void *pp)
117 {
118 unsigned char const *p = (unsigned char const *)pp;
119
120 return ((p[1] << 8) | p[0]);
121 }
122
123 static __inline uint32_t
le32dec(const void * pp)124 le32dec(const void *pp)
125 {
126 unsigned char const *p = (unsigned char const *)pp;
127
128 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
129 }
130
131 static __inline uint64_t
le64dec(const void * pp)132 le64dec(const void *pp)
133 {
134 unsigned char const *p = (unsigned char const *)pp;
135
136 return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
137 }
138
139 static __inline void
be16enc(void * pp,uint16_t u)140 be16enc(void *pp, uint16_t u)
141 {
142 unsigned char *p = (unsigned char *)pp;
143
144 p[0] = (u >> 8) & 0xff;
145 p[1] = u & 0xff;
146 }
147
148 static __inline void
be32enc(void * pp,uint32_t u)149 be32enc(void *pp, uint32_t u)
150 {
151 unsigned char *p = (unsigned char *)pp;
152
153 p[0] = (u >> 24) & 0xff;
154 p[1] = (u >> 16) & 0xff;
155 p[2] = (u >> 8) & 0xff;
156 p[3] = u & 0xff;
157 }
158
159 static __inline void
be64enc(void * pp,uint64_t u)160 be64enc(void *pp, uint64_t u)
161 {
162 unsigned char *p = (unsigned char *)pp;
163
164 be32enc(p, u >> 32);
165 be32enc(p + 4, u & 0xffffffff);
166 }
167
168 static __inline void
le16enc(void * pp,uint16_t u)169 le16enc(void *pp, uint16_t u)
170 {
171 unsigned char *p = (unsigned char *)pp;
172
173 p[0] = u & 0xff;
174 p[1] = (u >> 8) & 0xff;
175 }
176
177 static __inline void
le32enc(void * pp,uint32_t u)178 le32enc(void *pp, uint32_t u)
179 {
180 unsigned char *p = (unsigned char *)pp;
181
182 p[0] = u & 0xff;
183 p[1] = (u >> 8) & 0xff;
184 p[2] = (u >> 16) & 0xff;
185 p[3] = (u >> 24) & 0xff;
186 }
187
188 static __inline void
le64enc(void * pp,uint64_t u)189 le64enc(void *pp, uint64_t u)
190 {
191 unsigned char *p = (unsigned char *)pp;
192
193 le32enc(p, u & 0xffffffff);
194 le32enc(p + 4, u >> 32);
195 }
196
197 #endif /* _SYS_ENDIAN_H_ */
198