BitPacker.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_BITPACKER_H
#define CXXUTILS_BITPACKER_H
 
 
#include <stdint.h>
#include <cassert>
 
 
namespace CxxUtils {
 
 
template <class STREAM>
class BitPacker
{
public:
  BitPacker (uint8_t nbits, STREAM& stream);
 
 
  ~BitPacker();
 
 
  void pack (uint32_t x);
 
 
private:
  uint32_t m_buf;
 
  uint8_t m_nbuf;
 
  uint8_t m_nbits;
 
  STREAM& m_stream;
};
 
 
template <class STREAM>
class BitPacker8
{
public:
  BitPacker8 (STREAM& stream);
 
 
  BitPacker8 (uint8_t nbits, STREAM& stream);
 
 
  ~BitPacker8();
 
 
  void pack (uint32_t x);
 
 
private:
  uint32_t m_buf;
 
  uint8_t m_nbuf;
 
  STREAM& m_stream;
};
 
 
template <class STREAM>
class BitPacker16
{
public:
  BitPacker16 (STREAM& stream);
 
 
  BitPacker16 (uint8_t nbits, STREAM& stream);
 
 
  ~BitPacker16();
 
 
  void pack (uint32_t x);
 
 
private:
  uint32_t m_buf;
 
  uint8_t m_nbuf;
 
  STREAM& m_stream;
};
 
 
} // namespace CxxUtils
 
 
#include "CxxUtils/BitPacker.icc"
 
 
#endif // not CXXUTILS_BITPACKER_H