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Annotation of kernel/bsd/i386/endian.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            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_ */

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