bsd/i386/endian.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright 1995 NeXT Computer, Inc. All rights reserved.
  27  */
  28 /*
  29  * Copyright (c) 1987, 1991, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)endian.h    8.1 (Berkeley) 6/11/93
  61  */
  62
  63 #ifndef _I386__ENDIAN_H_
  64 #define _I386__ENDIAN_H_
  65
  66 /*
  67  * Define _NOQUAD if the compiler does NOT support 64-bit integers.
  68  */
  69 /* #define _NOQUAD */
  70
  71 /*
  72  * Define the order of 32-bit words in 64-bit words.
  73  */
  74 #define _QUAD_HIGHWORD 1
  75 #define _QUAD_LOWWORD 0
  76
  77 #if     defined(KERNEL) || !defined(_POSIX_SOURCE)
  78 /*
  79  * Definitions for byte order, according to byte significance from low
  80  * address to high.
  81  */
  82 #define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
  83 #define BIG_ENDIAN      4321    /* MSB first: 68000, ibm, net */
  84 #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long */
  85
  86 #define BYTE_ORDER      LITTLE_ENDIAN
  87
  88 #include <sys/cdefs.h>
  89
  90 __BEGIN_DECLS
  91 unsigned long   htonl __P((unsigned long));
  92 unsigned short  htons __P((unsigned short));
  93 unsigned long   ntohl __P((unsigned long));
  94 unsigned short  ntohs __P((unsigned short));
  95 __END_DECLS
  96
  97 /*
  98  * Macros for network/external number representation conversion.
  99  */
 100 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
 101 #define ntohl(x)        (x)
 102 #define ntohs(x)        (x)
 103 #define htonl(x)        (x)
 104 #define htons(x)        (x)
 105
 106 #define NTOHL(x)        (x)
 107 #define NTOHS(x)        (x)
 108 #define HTONL(x)        (x)
 109 #define HTONS(x)        (x)
 110
 111 #else
 112 #include <machine/byte_order.h>
 113
 114 #define ntohl(x)        NXSwapBigLongToHost(x)
 115 #define ntohs(x)        NXSwapBigShortToHost(x)
 116 #define htonl(x)        NXSwapHostLongToBig(x)
 117 #define htons(x)        NXSwapHostShortToBig(x)
 118
 119 #define NTOHL(x)        (x) = ntohl((u_long)x)
 120 #define NTOHS(x)        (x) = ntohs((u_short)x)
 121 #define HTONL(x)        (x) = htonl((u_long)x)
 122 #define HTONS(x)        (x) = htons((u_short)x)
 123 #endif
 124 #endif /* defined(KERNEL) || !defined(_POSIX_SOURCE) */
 125 #endif /* !_I386__ENDIAN_H_ */