/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/CxxUtils/CxxUtils/FloatPacker.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
// $Id$
#ifndef CXXUTILS_FLOATPACKER_H
#define CXXUTILS_FLOATPACKER_H


#include <string>
#include <stdint.h>



namespace CxxUtils {


class FloatPacker
{
public:
  typedef uint32_t Packdest;


  FloatPacker (int nbits,
               int nmantissa,
               double scale = 1,
               bool is_signed = true,
               bool round = false);


  bool errcheck (std::string& err) const;


  Packdest pack (double src) const;


  double unpack (Packdest val) const;


private:
  int m_nmantissa;

  double m_scale;

  double m_invscale;

  bool m_is_signed;

  bool m_round;

  int m_npack;

  Packdest m_npack_ones;

  Packdest m_signmask;

  int m_nexp;

  Packdest m_nexp_ones;

  int m_min_exp;

  int m_max_exp;

  mutable std::string m_lasterr;
};


} // namespace CxxUtils


#endif // not CXXUTILS_FLOATPACKER_H

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