FreeBSD/Linux Kernel Cross Reference
sys/bsd/ppc/endian.h

     /*
      * Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
      * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
     * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * Copyright (c) 1987, 1991, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)endian.h    8.1 (Berkeley) 6/10/93
     */
    
    #ifndef _PPC_ENDIAN_H_
    #define _PPC_ENDIAN_H_
    
    /*
     * Define the order of 32-bit words in 64-bit words.
     */
    #define _QUAD_HIGHWORD 0
    #define _QUAD_LOWWORD 1
    
    #if     defined(KERNEL) || !defined(_POSIX_SOURCE)
    /*
     * Definitions for byte order, according to byte significance from low
     * address to high.
     */
    #define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
    #define BIG_ENDIAN      4321    /* MSB first: 68000, ibm, net, ppc */
    #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long */
    
    #define BYTE_ORDER      BIG_ENDIAN
    
    #include <sys/cdefs.h>
    
    #ifndef __ASSEMBLER__
    __BEGIN_DECLS
    unsigned long   htonl __P((unsigned long));
    unsigned short  htons __P((unsigned short));
    unsigned long   ntohl __P((unsigned long));
    unsigned short  ntohs __P((unsigned short));
    __END_DECLS
    #endif /* __ASSEMBLER__ */
    
    /*
     * Macros for network/external number representation conversion.
     */
    #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
    #define ntohl(x)        (x)
    #define ntohs(x)        (x)
    #define htonl(x)        (x)
    #define htons(x)        (x)
   
   #define NTOHL(x)        (x)
   #define NTOHS(x)        (x)
   #define HTONL(x)        (x)
   #define HTONS(x)        (x)
   
   #else
   
   #include <machine/byte_order.h>
    
   #define ntohl(x)        NXSwapBigLongToHost(x)
   #define ntohs(x)        NXSwapBigShortToHost(x)
   #define htonl(x)        NXSwapHostLongToBig(x)
   #define htons(x)        NXSwapHostShortToBig(x)
   
   #define NTOHL(x)        (x) = ntohl((u_long)x)
   #define NTOHS(x)        (x) = ntohs((u_short)x)
   #define HTONL(x)        (x) = htonl((u_long)x)
   #define HTONS(x)        (x) = htons((u_short)x)
   #endif
   #endif /* defined(KERNEL) || !defined(_POSIX_SOURCE) */
   #endif /* !_PPC_ENDIAN_H_ */

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