other-licenses/7zstub/src/7zip/Common/LSBFDecoder.cpp

   1 // Stream/LSBFDecoder.cpp
   2
   3 #include "StdAfx.h"
   4
   5 #include "LSBFDecoder.h"
   6
   7 namespace NStream {
   8 namespace NLSBF {
   9
  10 Byte kInvertTable[256];
  11
  12 class CInverterTableInitializer
  13 {
  14 public:
  15   CInverterTableInitializer()
  16   {
  17     for(int i = 0; i < 256; i++)
  18     {
  19       Byte b = Byte(i);
  20       Byte bInvert = 0;
  21       for(int j = 0; j < 8; j++)
  22       {
  23         bInvert <<= 1;
  24         if (b & 1)
  25           bInvert |= 1;
  26         b >>= 1;
  27       }
  28       kInvertTable[i] = bInvert;
  29     }
  30   }
  31 } g_InverterTableInitializer;
  32
  33
  34 }}