bsd/sys/_endian.h

   1 /*
   2  * Copyright (c) 2004, 2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*
  30  * Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
  31  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
  32  *
  33  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  34  *
  35  * This file contains Original Code and/or Modifications of Original Code
  36  * as defined in and that are subject to the Apple Public Source License
  37  * Version 2.0 (the 'License'). You may not use this file except in
  38  * compliance with the License. The rights granted to you under the License
  39  * may not be used to create, or enable the creation or redistribution of,
  40  * unlawful or unlicensed copies of an Apple operating system, or to
  41  * circumvent, violate, or enable the circumvention or violation of, any
  42  * terms of an Apple operating system software license agreement.
  43  *
  44  * Please obtain a copy of the License at
  45  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  46  *
  47  * The Original Code and all software distributed under the License are
  48  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  49  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  50  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  51  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  52  * Please see the License for the specific language governing rights and
  53  * limitations under the License.
  54  *
  55  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  56  */
  57 /*
  58  * Copyright (c) 1987, 1991, 1993
  59  *      The Regents of the University of California.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  * 1. Redistributions of source code must retain the above copyright
  65  *    notice, this list of conditions and the following disclaimer.
  66  * 2. Redistributions in binary form must reproduce the above copyright
  67  *    notice, this list of conditions and the following disclaimer in the
  68  *    documentation and/or other materials provided with the distribution.
  69  * 3. All advertising materials mentioning features or use of this software
  70  *    must display the following acknowledgement:
  71  *      This product includes software developed by the University of
  72  *      California, Berkeley and its contributors.
  73  * 4. Neither the name of the University nor the names of its contributors
  74  *    may be used to endorse or promote products derived from this software
  75  *    without specific prior written permission.
  76  *
  77  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  78  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  79  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  80  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  81  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  82  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  83  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  84  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  85  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  86  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  87  * SUCH DAMAGE.
  88  */
  89
  90 #ifndef _SYS__ENDIAN_H_
  91 #define _SYS__ENDIAN_H_
  92
  93 #include <sys/cdefs.h>
  94
  95 /*
  96  * Macros for network/external number representation conversion.
  97  */
  98
  99 #if defined(lint)
 100
 101 __BEGIN_DECLS
 102 __uint16_t      ntohs(__uint16_t);
 103 __uint16_t      htons(__uint16_t);
 104 __uint32_t      ntohl(__uint32_t);
 105 __uint32_t      htonl(__uint32_t);
 106 __END_DECLS
 107
 108 #elif __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
 109
 110 #define ntohl(x)        ((__uint32_t)(x))
 111 #define ntohs(x)        ((__uint16_t)(x))
 112 #define htonl(x)        ((__uint32_t)(x))
 113 #define htons(x)        ((__uint16_t)(x))
 114
 115 #if     defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
 116 #define NTOHL(x)        (x)
 117 #define NTOHS(x)        (x)
 118 #define HTONL(x)        (x)
 119 #define HTONS(x)        (x)
 120 #endif /* defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
 121
 122 #else   /* __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN */
 123
 124 #include <libkern/_OSByteOrder.h>
 125
 126 #define ntohs(x)        __DARWIN_OSSwapInt16(x)
 127 #define htons(x)        __DARWIN_OSSwapInt16(x)
 128
 129 #define ntohl(x)        __DARWIN_OSSwapInt32(x)
 130 #define htonl(x)        __DARWIN_OSSwapInt32(x)
 131
 132 #if     defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
 133 #define NTOHL(x)        (x) = ntohl((__uint32_t)x)
 134 #define NTOHS(x)        (x) = ntohs((__uint16_t)x)
 135 #define HTONL(x)        (x) = htonl((__uint32_t)x)
 136 #define HTONS(x)        (x) = htons((__uint16_t)x)
 137 #endif /* defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
 138 #endif /* __DARWIN_BYTE_ORDER */
 139 #endif /* !_SYS__ENDIAN_H_ */