2 * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _SYS_ENDIAN_H_
30 #define _SYS_ENDIAN_H_
32 #include <sys/cdefs.h>
33 #include <sys/_types.h>
34 #include <machine/endian.h>
36 #ifndef _UINT16_T_DECLARED
37 typedef __uint16_t uint16_t;
38 #define _UINT16_T_DECLARED
41 #ifndef _UINT32_T_DECLARED
42 typedef __uint32_t uint32_t;
43 #define _UINT32_T_DECLARED
46 #ifndef _UINT64_T_DECLARED
47 typedef __uint64_t uint64_t;
48 #define _UINT64_T_DECLARED
52 * General byte order swapping functions.
54 #define bswap16(x) __bswap16(x)
55 #define bswap32(x) __bswap32(x)
56 #define bswap64(x) __bswap64(x)
59 * Host to big endian, host to little endian, big endian to host, and little
60 * endian to host byte order functions as detailed in byteorder(9).
62 #if _BYTE_ORDER == _LITTLE_ENDIAN
63 #define htobe16(x) bswap16((x))
64 #define htobe32(x) bswap32((x))
65 #define htobe64(x) bswap64((x))
66 #define htole16(x) ((uint16_t)(x))
67 #define htole32(x) ((uint32_t)(x))
68 #define htole64(x) ((uint64_t)(x))
70 #define be16toh(x) bswap16((x))
71 #define be32toh(x) bswap32((x))
72 #define be64toh(x) bswap64((x))
73 #define le16toh(x) ((uint16_t)(x))
74 #define le32toh(x) ((uint32_t)(x))
75 #define le64toh(x) ((uint64_t)(x))
76 #else /* _BYTE_ORDER != _LITTLE_ENDIAN */
77 #define htobe16(x) ((uint16_t)(x))
78 #define htobe32(x) ((uint32_t)(x))
79 #define htobe64(x) ((uint64_t)(x))
80 #define htole16(x) bswap16((x))
81 #define htole32(x) bswap32((x))
82 #define htole64(x) bswap64((x))
84 #define be16toh(x) ((uint16_t)(x))
85 #define be32toh(x) ((uint32_t)(x))
86 #define be64toh(x) ((uint64_t)(x))
87 #define le16toh(x) bswap16((x))
88 #define le32toh(x) bswap32((x))
89 #define le64toh(x) bswap64((x))
90 #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
92 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
94 static __inline uint16_t
95 be16dec(const void *pp)
97 unsigned char const *p = pp;
99 return ((p[0] << 8) | p[1]);
102 static __inline uint32_t
103 be32dec(const void *pp)
105 unsigned char const *p = pp;
107 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
110 static __inline uint64_t
111 be64dec(const void *pp)
113 unsigned char const *p = pp;
115 return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
118 static __inline uint16_t
119 le16dec(const void *pp)
121 unsigned char const *p = pp;
123 return ((p[1] << 8) | p[0]);
126 static __inline uint32_t
127 le32dec(const void *pp)
129 unsigned char const *p = pp;
131 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
134 static __inline uint64_t
135 le64dec(const void *pp)
137 unsigned char const *p = pp;
139 return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
143 be16enc(void *pp, uint16_t u)
145 unsigned char *p = pp;
147 p[0] = (u >> 8) & 0xff;
152 be32enc(void *pp, uint32_t u)
154 unsigned char *p = pp;
156 p[0] = (u >> 24) & 0xff;
157 p[1] = (u >> 16) & 0xff;
158 p[2] = (u >> 8) & 0xff;
163 be64enc(void *pp, uint64_t u)
165 unsigned char *p = pp;
168 be32enc(p + 4, u & 0xffffffff);
172 le16enc(void *pp, uint16_t u)
174 unsigned char *p = pp;
177 p[1] = (u >> 8) & 0xff;
181 le32enc(void *pp, uint32_t u)
183 unsigned char *p = pp;
186 p[1] = (u >> 8) & 0xff;
187 p[2] = (u >> 16) & 0xff;
188 p[3] = (u >> 24) & 0xff;
192 le64enc(void *pp, uint64_t u)
194 unsigned char *p = pp;
196 le32enc(p, u & 0xffffffff);
197 le32enc(p + 4, u >> 32);
200 #endif /* _SYS_ENDIAN_H_ */