FreeBSD/Linux Kernel Cross Reference
sys/sys/endian.h
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: releng/5.0/sys/sys/endian.h 95737 2002-04-29 16:58:54Z mike $
27 */
28
29 #ifndef _SYS_ENDIAN_H_
30 #define _SYS_ENDIAN_H_
31
32 #include <sys/cdefs.h>
33 #include <sys/_types.h>
34 #include <machine/endian.h>
35
36 #ifndef _UINT16_T_DECLARED
37 typedef __uint16_t uint16_t;
38 #define _UINT16_T_DECLARED
39 #endif
40
41 #ifndef _UINT32_T_DECLARED
42 typedef __uint32_t uint32_t;
43 #define _UINT32_T_DECLARED
44 #endif
45
46 #ifndef _UINT64_T_DECLARED
47 typedef __uint64_t uint64_t;
48 #define _UINT64_T_DECLARED
49 #endif
50
51 /*
52 * General byte order swapping functions.
53 */
54 #define bswap16(x) __bswap16(x)
55 #define bswap32(x) __bswap32(x)
56 #define bswap64(x) __bswap64(x)
57
58 /*
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).
61 */
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))
69
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))
83
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 */
91
92 #endif /* _SYS_ENDIAN_H_ */
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