1 /* @(#)btorder.h 1.22 12/12/03 Copyright 1996-2012 J. Schilling */ 2 /* 3 * Definitions for Bit and Byte ordering 4 * 5 * Copyright (c) 1996-2012 J. Schilling 6 */ 7 /* 8 * The contents of this file are subject to the terms of the 9 * Common Development and Distribution License, Version 1.0 only 10 * (the "License"). You may not use this file except in compliance 11 * with the License. 12 * 13 * See the file CDDL.Schily.txt in this distribution for details. 14 * A copy of the CDDL is also available via the Internet at 15 * http://www.opensource.org/licenses/cddl1.txt 16 * 17 * When distributing Covered Code, include this CDDL HEADER in each 18 * file and include the License file CDDL.Schily.txt from this distribution. 19 */ 20 21 22 #ifndef _SCHILY_BTORDER_H 23 #define _SCHILY_BTORDER_H 24 25 #ifndef _SCHILY_MCONFIG_H 26 #include <schily/mconfig.h> /* load bit/byte-oder from xmconfig.h */ 27 #endif 28 29 #ifndef _SCHILY_TYPES_H 30 #include <schily/types.h> /* try to load isa_defs.h on Solaris */ 31 #endif 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 /* 38 * Convert bit-order definitions from xconfig.h into our values 39 * and verify them. 40 */ 41 #if defined(HAVE_C_BITFIELDS) && \ 42 defined(BITFIELDS_LTOH) 43 #define _BIT_FIELDS_LTOH 44 #endif 45 46 #if defined(HAVE_C_BITFIELDS) && \ 47 defined(BITFIELDS_HTOL) 48 #define _BIT_FIELDS_HTOL 49 #endif 50 51 #if defined(HAVE_C_BITFIELDS) && \ 52 !defined(BITFIELDS_HTOL) 53 #define BITFIELDS_LTOH 54 #define _BIT_FIELDS_LTOH 55 #endif 56 57 #if defined(_BIT_FIELDS_LTOH) && defined(_BIT_FIELDS_HTOL) 58 /* 59 * #error will not work for all compilers (e.g. sunos4) 60 * The following line will abort compilation on all compilers 61 * if none of the above is defined. And that's what we want. 62 */ 63 error Only one of _BIT_FIELDS_LTOH or _BIT_FIELDS_HTOL may be defined 64 65 #include <schily/err_bit.h> /* Avoid "unknown directive" with K&R */ 66 #endif 67 68 69 /* 70 * Convert byte-order definitions from xconfig.h into our values 71 * and verify them. 72 * Note that we cannot use the definitions _LITTLE_ENDIAN and _BIG_ENDIAN 73 * because they are used on IRIX-6.5 with different meaning. 74 */ 75 #if defined(HAVE_C_BIGENDIAN) && \ 76 !defined(WORDS_BIGENDIAN) 77 #define WORDS_LITTLEENDIAN 78 /* #define _LITTLE_ENDIAN */ 79 #endif 80 81 #if defined(HAVE_C_BIGENDIAN) && \ 82 defined(WORDS_BIGENDIAN) 83 #undef WORDS_LITTLEENDIAN 84 /* #define _BIG_ENDIAN */ 85 #endif 86 87 #if defined(_BIT_FIELDS_LTOH) || defined(_BIT_FIELDS_HTOL) 88 /* 89 * Bitorder is already known. 90 */ 91 #else 92 /* 93 * Bitorder not yet known. 94 */ 95 # if defined(sun3) || defined(mc68000) || \ 96 defined(sun4) || defined(__sparc) || defined(sparc) || \ 97 defined(__hppa) || defined(_ARCH_PPC) || defined(_IBMR2) 98 # define _BIT_FIELDS_HTOL 99 # endif 100 101 # if defined(__sgi) && defined(__mips) 102 # define _BIT_FIELDS_HTOL 103 # endif 104 105 # if defined(__i386__) || defined(__i386) || defined(i386) || \ 106 defined(__alpha__) || defined(__alpha) || defined(alpha) || \ 107 defined(__arm__) || defined(__arm) || defined(arm) 108 # define _BIT_FIELDS_LTOH 109 # endif 110 111 # if defined(__ppc__) || defined(ppc) || defined(__ppc) || \ 112 defined(__PPC) || defined(powerpc) || defined(__powerpc__) 113 114 # if defined(__BIG_ENDIAN__) 115 # define _BIT_FIELDS_HTOL 116 # else 117 # define _BIT_FIELDS_LTOH 118 # endif 119 # endif 120 #endif 121 122 #ifdef __cplusplus 123 } 124 #endif 125 126 #endif /* _SCHILY_BTORDER_H */ 127