bsd/sys/_endian.h

   1 /*
   2  * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
  26  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
  27  *
  28  * @APPLE_LICENSE_HEADER_START@
  29  *
  30  * This file contains Original Code and/or Modifications of Original Code
  31  * as defined in and that are subject to the Apple Public Source License
  32  * Version 2.0 (the 'License'). You may not use this file except in
  33  * compliance with the License. Please obtain a copy of the License at
  34  * http://www.opensource.apple.com/apsl/ and read it before using this
  35  * file.
  36  *
  37  * The Original Code and all software distributed under the License are
  38  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  39  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  40  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  41  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  42  * Please see the License for the specific language governing rights and
  43  * limitations under the License.
  44  *
  45  * @APPLE_LICENSE_HEADER_END@
  46  */
  47 /*
  48  * Copyright (c) 1987, 1991, 1993
  49  *      The Regents of the University of California.  All rights reserved.
  50  *
  51  * Redistribution and use in source and binary forms, with or without
  52  * modification, are permitted provided that the following conditions
  53  * are met:
  54  * 1. Redistributions of source code must retain the above copyright
  55  *    notice, this list of conditions and the following disclaimer.
  56  * 2. Redistributions in binary form must reproduce the above copyright
  57  *    notice, this list of conditions and the following disclaimer in the
  58  *    documentation and/or other materials provided with the distribution.
  59  * 3. All advertising materials mentioning features or use of this software
  60  *    must display the following acknowledgement:
  61  *      This product includes software developed by the University of
  62  *      California, Berkeley and its contributors.
  63  * 4. Neither the name of the University nor the names of its contributors
  64  *    may be used to endorse or promote products derived from this software
  65  *    without specific prior written permission.
  66  *
  67  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  68  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  69  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  70  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  71  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  72  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  73  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  74  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  75  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  76  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  77  * SUCH DAMAGE.
  78  */
  79
  80 #ifndef _SYS__ENDIAN_H_
  81 #define _SYS__ENDIAN_H_
  82
  83 #include <sys/cdefs.h>
  84
  85 /*
  86  * Macros for network/external number representation conversion.
  87  */
  88 #if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN && !defined(lint)
  89 #define ntohl(x)        (x)
  90 #define ntohs(x)        (x)
  91 #define htonl(x)        (x)
  92 #define htons(x)        (x)
  93
  94 #if     defined(KERNEL) || !defined(_POSIX_C_SOURCE)
  95 #define NTOHL(x)        (x)
  96 #define NTOHS(x)        (x)
  97 #define HTONL(x)        (x)
  98 #define HTONS(x)        (x)
  99 #endif /* defined(KERNEL) || !defined(_POSIX_C_SOURCE) */
 100
 101 #else
 102
 103 #if !defined(__ASSEMBLER__)
 104
 105 #include <stdint.h>
 106 #include <machine/byte_order.h>
 107
 108 __BEGIN_DECLS
 109 uint16_t        ntohs(uint16_t);
 110 uint16_t        htons(uint16_t);
 111 uint32_t        ntohl(uint32_t);
 112 uint32_t        htonl(uint32_t);
 113 __END_DECLS
 114 #endif /* !defined(__ASSEMBLER__) */
 115
 116 #define ntohs(x)        NXSwapBigShortToHost(x)
 117 #define htons(x)        NXSwapHostShortToBig(x)
 118
 119 #if defined(__LP64__)
 120 #define ntohl(x)        NXSwapBigIntToHost(x)
 121 #define htonl(x)        NXSwapHostIntToBig(x)
 122 #else
 123 #define ntohl(x)        NXSwapBigLongToHost(x)
 124 #define htonl(x)        NXSwapHostLongToBig(x)
 125 #endif /* defined(__LP64__) */
 126
 127 #if     defined(KERNEL) || !defined(_POSIX_C_SOURCE)
 128 #define NTOHL(x)        (x) = ntohl((u_long)x)
 129 #define NTOHS(x)        (x) = ntohs((u_short)x)
 130 #define HTONL(x)        (x) = htonl((u_long)x)
 131 #define HTONS(x)        (x) = htons((u_short)x)
 132 #endif /* defined(KERNEL) || !defined(_POSIX_C_SOURCE) */
 133 #endif /* __DARWIN_BYTE_ORDER != __DARWIN_BIG_ENDIAN || defined(lint) */
 134 #endif /* !_SYS__ENDIAN_H_ */