BitUnpacker.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
 
/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id$
#ifndef CXXUTILS_BITUNPACKER_H
#define CXXUTILS_BITUNPACKER_H
 
 
#include <stdint.h>
#include <cassert>
 
 
namespace CxxUtils {
 
 
template <class STREAM>
class BitUnpacker
{
public:
  BitUnpacker (uint8_t nbits, STREAM& stream);
 
 
  uint32_t unpack();
 
 
private:
  uint32_t m_buf;
 
  uint8_t m_nbuf;
 
  uint8_t m_nbits;
 
  STREAM& m_stream;
 
  uint32_t m_mask;
};
 
 
template <class STREAM>
class BitUnpacker8
{
public:
  BitUnpacker8 (STREAM& stream);
 
 
  BitUnpacker8 (uint8_t nbits, STREAM& stream);
 
 
  uint32_t unpack();
 
 
private:
  uint32_t m_buf;
 
  uint8_t m_nbuf;
 
  STREAM& m_stream;
};
 
 
template <class STREAM>
class BitUnpacker16
{
public:
  BitUnpacker16 (STREAM& stream);
 
 
  BitUnpacker16 (uint8_t nbits, STREAM& stream);
 
 
  uint32_t unpack();
 
 
private:
  uint32_t m_buf;
 
  uint8_t m_nbuf;
 
  STREAM& m_stream;
};
 
 
} // namespace CxxUtils
 
 
#include "CxxUtils/BitUnpacker.icc"
 
 
#endif // not CXXUTILS_BITUNPACKER_H