Annotation of prex/include/sys/endian.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1987, 1991, 1993
3: * The Regents of the University of California. 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: * 3. Neither the name of the University nor the names of its contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: *
29: * @(#)endian.h 8.1 (Berkeley) 6/10/93
30: */
31:
32: #ifndef _SYS_ENDIAN_H_
33: #define _SYS_ENDIAN_H_
34:
35: /*
36: * Define the order of 32-bit words in 64-bit words.
37: */
38: #define _QUAD_HIGHWORD 0
39: #define _QUAD_LOWWORD 1
40:
41: /*
42: * Definitions for byte order, according to byte significance from low
43: * address to high.
44: */
45: #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
46: #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
47: #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
48:
49: #include <conf/config.h>
50: #include <sys/cdefs.h>
51: #include <sys/types.h>
52:
53: #ifdef CONFIG_BIG_ENDIAN
54: #define BYTE_ORDER BIG_ENDIAN
55: #else
56: #define BYTE_ORDER LITTLE_ENDIAN
57: #endif
58:
59: __BEGIN_DECLS
60: uint32_t htonl(uint32_t);
61: uint16_t htons(uint16_t);
62: uint32_t ntohl(uint32_t);
63: uint16_t ntohs(uint16_t);
64: __END_DECLS
65:
66: /*
67: * Macros for network/external number representation conversion.
68: */
69: #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
70: #define ntohl(x) (x)
71: #define ntohs(x) (x)
72: #define htonl(x) (x)
73: #define htons(x) (x)
74:
75: #define NTOHL(x) (x)
76: #define NTOHS(x) (x)
77: #define HTONL(x) (x)
78: #define HTONS(x) (x)
79:
80: #else
81:
82: #define NTOHL(x) (x) = ntohl((uint32_t)(x))
83: #define NTOHS(x) (x) = ntohs((uint16_t)(x))
84: #define HTONL(x) (x) = htonl((uint32_t)(x))
85: #define HTONS(x) (x) = htons((uint16_t)(x))
86: #endif
87: #endif /* !_SYS_ENDIAN_H_ */
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