reactos/sdk/tools/mkisofs/schilytools/include/schily/btorder.h

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