1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30/*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40#ifndef _SYS_BYTEORDER_H
41#define	_SYS_BYTEORDER_H
42
43#include <sys/isa_defs.h>
44#include <sys/int_types.h>
45
46#if defined(__GNUC__) && defined(_ASM_INLINES) && \
47	(defined(__i386) || defined(__amd64))
48#include <asm/byteorder.h>
49#endif
50
51#ifdef	__cplusplus
52extern "C" {
53#endif
54
55/*
56 * macros for conversion between host and (internet) network byte order
57 */
58
59#if defined(_BIG_ENDIAN) && !defined(ntohl) && !defined(__lint)
60/* big-endian */
61#define	ntohl(x)	(x)
62#define	ntohs(x)	(x)
63#define	htonl(x)	(x)
64#define	htons(x)	(x)
65#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
66#define	ntohll(x)	(x)
67#define	htonll(x)	(x)
68#endif	/* !_XPG4_2 || __EXTENSIONS__ */
69
70#elif !defined(ntohl) /* little-endian */
71
72#ifndef	_IN_PORT_T
73#define	_IN_PORT_T
74typedef uint16_t in_port_t;
75#endif
76
77#ifndef	_IN_ADDR_T
78#define	_IN_ADDR_T
79typedef uint32_t in_addr_t;
80#endif
81
82#if !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5)
83extern	uint32_t htonl(uint32_t);
84extern	uint16_t htons(uint16_t);
85extern	uint32_t ntohl(uint32_t);
86extern	uint16_t ntohs(uint16_t);
87#else
88extern	in_addr_t htonl(in_addr_t);
89extern	in_port_t htons(in_port_t);
90extern	in_addr_t ntohl(in_addr_t);
91extern	in_port_t ntohs(in_port_t);
92#endif	/* !_XPG4_2 || __EXTENSIONS__ || _XPG5 */
93
94#if defined(_LP64) || defined(_LONGLONG_TYPE)
95#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
96extern	uint64_t htonll(uint64_t);
97extern	uint64_t ntohll(uint64_t);
98#endif	/* !_XPG4_2 || __EXTENSIONS__ */
99#endif	/* _LP64 || _LONGLONG_TYPE  */
100#endif
101
102#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
103
104/*
105 * Macros to reverse byte order
106 */
107#define	BSWAP_8(x)	((x) & 0xff)
108#if !defined(__i386) && !defined(__amd64)
109#define	BSWAP_16(x)	((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
110#define	BSWAP_32(x)	(((uint32_t)(x) << 24) | \
111			(((uint32_t)(x) << 8) & 0xff0000) | \
112			(((uint32_t)(x) >> 8) & 0xff00) | \
113			((uint32_t)(x)  >> 24))
114#else /* x86 */
115#define	BSWAP_16(x)	htons(x)
116#define	BSWAP_32(x)	htonl(x)
117#endif	/* !__i386 && !__amd64 */
118
119#if defined(_LP64) || defined(_LONGLONG_TYPE)
120#if (!defined(__i386) && !defined(__amd64))
121#define	BSWAP_64(x)	(((uint64_t)(x) << 56) | \
122			(((uint64_t)(x) << 40) & 0xff000000000000ULL) | \
123			(((uint64_t)(x) << 24) & 0xff0000000000ULL) | \
124			(((uint64_t)(x) << 8)  & 0xff00000000ULL) | \
125			(((uint64_t)(x) >> 8)  & 0xff000000ULL) | \
126			(((uint64_t)(x) >> 24) & 0xff0000ULL) | \
127			(((uint64_t)(x) >> 40) & 0xff00ULL) | \
128			((uint64_t)(x)  >> 56))
129#else /* x86 */
130#define	BSWAP_64(x)	htonll(x)
131#endif	/* !__i386 && !__amd64 */
132#else /* no uint64_t */
133#define	BSWAP_64(x)	((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
134#endif	/* _LP64 || _LONGLONG_TYPE  */
135
136#define	BMASK_8(x)	((x) & 0xff)
137#define	BMASK_16(x)	((x) & 0xffff)
138#define	BMASK_32(x)	((x) & 0xffffffff)
139#define	BMASK_64(x)	(x)
140
141/*
142 * Macros to convert from a specific byte order to/from native byte order
143 */
144#ifdef _BIG_ENDIAN
145#define	BE_8(x)		BMASK_8(x)
146#define	BE_16(x)	BMASK_16(x)
147#define	BE_32(x)	BMASK_32(x)
148#define	BE_64(x)	BMASK_64(x)
149#define	LE_8(x)		BSWAP_8(x)
150#define	LE_16(x)	BSWAP_16(x)
151#define	LE_32(x)	BSWAP_32(x)
152#define	LE_64(x)	BSWAP_64(x)
153#else
154#define	LE_8(x)		BMASK_8(x)
155#define	LE_16(x)	BMASK_16(x)
156#define	LE_32(x)	BMASK_32(x)
157#define	LE_64(x)	BMASK_64(x)
158#define	BE_8(x)		BSWAP_8(x)
159#define	BE_16(x)	BSWAP_16(x)
160#define	BE_32(x)	BSWAP_32(x)
161#define	BE_64(x)	BSWAP_64(x)
162#endif
163
164/*
165 * Macros to read unaligned values from a specific byte order to
166 * native byte order
167 */
168
169#define	BE_IN8(xa) \
170	*((uint8_t *)(xa))
171
172#if !defined(__i386) && !defined(__amd64)
173#define	BE_IN16(xa) \
174	(((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa) + 1))
175
176#define	BE_IN32(xa) \
177	(((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa) + 2))
178
179#else /* x86 */
180#define	BE_IN16(xa) htons(*((uint16_t *)(void *)(xa)))
181#define	BE_IN32(xa) htonl(*((uint32_t *)(void *)(xa)))
182#endif	/* !__i386 && !__amd64 */
183
184#if (!defined(__i386) && !defined(__amd64)) || \
185	(!defined(_LP64) && !defined(_LONGLONG_TYPE))
186#define	BE_IN64(xa) \
187	(((uint64_t)BE_IN32(xa) << 32) | BE_IN32((uint8_t *)(xa) + 4))
188#else /* x86 */
189#define	BE_IN64(xa) htonll(*((uint64_t *)(void *)(xa)))
190#endif /* (!__i386 && !__amd64) || (!_LP64 && !_LONGLONG_TYPE) */
191
192#define	LE_IN8(xa) \
193	*((uint8_t *)(xa))
194
195#define	LE_IN16(xa) \
196	(((uint16_t)LE_IN8((uint8_t *)(xa) + 1) << 8) | LE_IN8(xa))
197
198#define	LE_IN32(xa) \
199	(((uint32_t)LE_IN16((uint8_t *)(xa) + 2) << 16) | LE_IN16(xa))
200
201#define	LE_IN64(xa) \
202	(((uint64_t)LE_IN32((uint8_t *)(xa) + 4) << 32) | LE_IN32(xa))
203
204/*
205 * Macros to write unaligned values from native byte order to a specific byte
206 * order.
207 */
208
209#define	BE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv);
210
211#define	BE_OUT16(xa, yv) \
212	BE_OUT8((uint8_t *)(xa) + 1, yv); \
213	BE_OUT8((uint8_t *)(xa), (yv) >> 8);
214
215#define	BE_OUT32(xa, yv) \
216	BE_OUT16((uint8_t *)(xa) + 2, yv); \
217	BE_OUT16((uint8_t *)(xa), (yv) >> 16);
218
219#if (!defined(__i386) && !defined(__amd64)) || \
220	(!defined(_LP64) && !defined(_LONGLONG_TYPE))
221#define	BE_OUT64(xa, yv) \
222	BE_OUT32((uint8_t *)(xa) + 4, yv); \
223	BE_OUT32((uint8_t *)(xa), (yv) >> 32);
224#else /* x86 with uint64_t */
225#define	BE_OUT64(xa, yv) *((uint64_t *)(void *)(xa)) = htonll((uint64_t)(yv));
226#endif	/* (!__i386 && !__amd64) || (!_LP64 && !_LONGLONG_TYPE) */
227
228#define	LE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv);
229
230#define	LE_OUT16(xa, yv) \
231	LE_OUT8((uint8_t *)(xa), yv); \
232	LE_OUT8((uint8_t *)(xa) + 1, (yv) >> 8);
233
234#define	LE_OUT32(xa, yv) \
235	LE_OUT16((uint8_t *)(xa), yv); \
236	LE_OUT16((uint8_t *)(xa) + 2, (yv) >> 16);
237
238#define	LE_OUT64(xa, yv) \
239	LE_OUT32((uint8_t *)(xa), yv); \
240	LE_OUT32((uint8_t *)(xa) + 4, (yv) >> 32);
241
242#endif	/* !_XPG4_2 || __EXTENSIONS__ */
243
244#ifdef	__cplusplus
245}
246#endif
247
248#endif /* _SYS_BYTEORDER_H */
249