2 * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
3 * Copyright (c) 2005 Robert N. M. Watson
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * Derived from FreeBSD src/sys/sys/endian.h:1.6.
28 * $P4: //depot/projects/trustedbsd/openbsm/compat/endian_enc.h#1 $
31 #ifndef _COMPAT_ENDIAN_ENC_H_
32 #define _COMPAT_ENDIAN_ENC_H_
35 * Some systems will have the uint/int types defined here already, others
42 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
44 static __inline uint16_t
45 be16dec(const void *pp)
47 unsigned char const *p = (unsigned char const *)pp;
49 return ((p[0] << 8) | p[1]);
52 static __inline uint32_t
53 be32dec(const void *pp)
55 unsigned char const *p = (unsigned char const *)pp;
57 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
60 static __inline uint64_t
61 be64dec(const void *pp)
63 unsigned char const *p = (unsigned char const *)pp;
65 return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
68 static __inline uint16_t
69 le16dec(const void *pp)
71 unsigned char const *p = (unsigned char const *)pp;
73 return ((p[1] << 8) | p[0]);
76 static __inline uint32_t
77 le32dec(const void *pp)
79 unsigned char const *p = (unsigned char const *)pp;
81 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
84 static __inline uint64_t
85 le64dec(const void *pp)
87 unsigned char const *p = (unsigned char const *)pp;
89 return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
93 be16enc(void *pp, uint16_t u)
95 unsigned char *p = (unsigned char *)pp;
97 p[0] = (u >> 8) & 0xff;
102 be32enc(void *pp, uint32_t u)
104 unsigned char *p = (unsigned char *)pp;
106 p[0] = (u >> 24) & 0xff;
107 p[1] = (u >> 16) & 0xff;
108 p[2] = (u >> 8) & 0xff;
113 be64enc(void *pp, uint64_t u)
115 unsigned char *p = (unsigned char *)pp;
118 be32enc(p + 4, u & 0xffffffff);
122 le16enc(void *pp, uint16_t u)
124 unsigned char *p = (unsigned char *)pp;
127 p[1] = (u >> 8) & 0xff;
131 le32enc(void *pp, uint32_t u)
133 unsigned char *p = (unsigned char *)pp;
136 p[1] = (u >> 8) & 0xff;
137 p[2] = (u >> 16) & 0xff;
138 p[3] = (u >> 24) & 0xff;
142 le64enc(void *pp, uint64_t u)
144 unsigned char *p = (unsigned char *)pp;
146 le32enc(p, u & 0xffffffff);
147 le32enc(p + 4, u >> 32);
150 #endif /* _COMPAT_ENDIAN_ENC_H_ */