src/liblzma/check/crc_macros.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       crc_macros.h
   4 /// \brief      Some endian-dependent macros for CRC32 and CRC64
   5 //
   6 //  Author:     Lasse Collin
   7 //
   8 //  This file has been put into the public domain.
   9 //  You can do whatever you want with this file.
  10 //
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #ifdef WORDS_BIGENDIAN
  14 #       define A(x) ((x) >> 24)
  15 #       define B(x) (((x) >> 16) & 0xFF)
  16 #       define C(x) (((x) >> 8) & 0xFF)
  17 #       define D(x) ((x) & 0xFF)
  18
  19 #       define S8(x) ((x) << 8)
  20 #       define S32(x) ((x) << 32)
  21
  22 #else
  23 #       define A(x) ((x) & 0xFF)
  24 #       define B(x) (((x) >> 8) & 0xFF)
  25 #       define C(x) (((x) >> 16) & 0xFF)
  26 #       define D(x) ((x) >> 24)
  27
  28 #       define S8(x) ((x) >> 8)
  29 #       define S32(x) ((x) >> 32)
  30 #endif