TruncatedPrecisionConverter.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
/* Local Variables:  */
/* mode: c++         */
/* End:              */
 
#ifndef TRUNCATEDPRECISIONCONVERTER_H
#define TRUNCATEDPRECISIONCONVERTER_H
 
 
namespace o2
{
namespace data_compression
{
 
template <class ParameterModelT>
class TruncatedPrecisionConverter
{
 public:
  TruncatedPrecisionConverter() : mParameterModel() {}
  ~TruncatedPrecisionConverter() = default;
  TruncatedPrecisionConverter(const TruncatedPrecisionConverter&) = delete;
  TruncatedPrecisionConverter& operator=(const TruncatedPrecisionConverter&) = delete;
 
  static const std::size_t sMaxLength = ParameterModelT::sBitlength;
  using code_type = typename ParameterModelT::converted_type;
 
  template <typename T, typename Writer>
  int write(T value, Writer writer)
  {
    uint8_t bitlength = 0;
    code_type content = 0;
    mParameterModel.convert(value, content, bitlength);
    return writer(content, bitlength);
  }
 
  void resetParameterModel() { mParameterModel.reset(); }
 
  const ParameterModelT& getModel() const { return mParameterModel; }
  ParameterModelT& getModel() { return mParameterModel; }
 
 private:
  ParameterModelT mParameterModel;
};
} // namespace data_compression
} // namespace o2
#endif