bsd/i386/endian.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright 1995 NeXT Computer, Inc. All rights reserved.
  24  */
  25 /*
  26  * Copyright (c) 1987, 1991, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)endian.h    8.1 (Berkeley) 6/11/93
  58  */
  59
  60 #ifndef _I386__ENDIAN_H_
  61 #define _I386__ENDIAN_H_
  62
  63 /*
  64  * Define _NOQUAD if the compiler does NOT support 64-bit integers.
  65  */
  66 /* #define _NOQUAD */
  67
  68 /*
  69  * Define the order of 32-bit words in 64-bit words.
  70  */
  71 #define _QUAD_HIGHWORD 1
  72 #define _QUAD_LOWWORD 0
  73
  74 #if     defined(KERNEL) || !defined(_POSIX_SOURCE)
  75 /*
  76  * Definitions for byte order, according to byte significance from low
  77  * address to high.
  78  */
  79 #define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
  80 #define BIG_ENDIAN      4321    /* MSB first: 68000, ibm, net */
  81 #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long */
  82
  83 #define BYTE_ORDER      LITTLE_ENDIAN
  84
  85 #include <sys/cdefs.h>
  86
  87 __BEGIN_DECLS
  88 unsigned long   htonl __P((unsigned long));
  89 unsigned short  htons __P((unsigned short));
  90 unsigned long   ntohl __P((unsigned long));
  91 unsigned short  ntohs __P((unsigned short));
  92 __END_DECLS
  93
  94 /*
  95  * Macros for network/external number representation conversion.
  96  */
  97 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
  98 #define ntohl(x)        (x)
  99 #define ntohs(x)        (x)
 100 #define htonl(x)        (x)
 101 #define htons(x)        (x)
 102
 103 #define NTOHL(x)        (x)
 104 #define NTOHS(x)        (x)
 105 #define HTONL(x)        (x)
 106 #define HTONS(x)        (x)
 107
 108 #else
 109 #include <machine/byte_order.h>
 110
 111 #define ntohl(x)        NXSwapBigLongToHost(x)
 112 #define ntohs(x)        NXSwapBigShortToHost(x)
 113 #define htonl(x)        NXSwapHostLongToBig(x)
 114 #define htons(x)        NXSwapHostShortToBig(x)
 115
 116 #define NTOHL(x)        (x) = ntohl((u_long)x)
 117 #define NTOHS(x)        (x) = ntohs((u_short)x)
 118 #define HTONL(x)        (x) = htonl((u_long)x)
 119 #define HTONS(x)        (x) = htons((u_short)x)
 120 #endif
 121 #endif /* defined(KERNEL) || !defined(_POSIX_SOURCE) */
 122 #endif /* !_I386__ENDIAN_H_ */