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
91static __inline uint16_t
92be16dec(const void *pp)
93{
94	unsigned char const *p = (unsigned char const *)pp;
95
96	return ((p[0] << 8) | p[1]);
97}
98
99static __inline uint32_t
100be32dec(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
107static __inline uint64_t
108be64dec(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
115static __inline uint16_t
116le16dec(const void *pp)
117{
118	unsigned char const *p = (unsigned char const *)pp;
119
120	return ((p[1] << 8) | p[0]);
121}
122
123static __inline uint32_t
124le32dec(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
131static __inline uint64_t
132le64dec(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
139static __inline void
140be16enc(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
148static __inline void
149be32enc(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
159static __inline void
160be64enc(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
168static __inline void
169le16enc(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
177static __inline void
178le32enc(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
188static __inline void
189le64enc(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