Method readMemdump

src/openms/source/FORMAT/HANDLERS/CachedMzMLHandler.cpp:59–105

  }

  void CachedMzMLHandler::readMemdump(MapType& exp_reading, const String& filename) const
  {
    std::ifstream ifs(filename.c_str(), std::ios::binary);
    if (ifs.fail())
    {
      throw Exception::FileNotFound(__FILE__, __LINE__, OPENMS_PRETTY_FUNCTION, filename);
    }

    Size exp_size, chrom_size;

    int file_identifier;
    ifs.read((char*)&file_identifier, sizeof(file_identifier));
    if (file_identifier != CACHED_MZML_FILE_IDENTIFIER)
    {
      throw Exception::ParseError(__FILE__, __LINE__, OPENMS_PRETTY_FUNCTION, 
        "File might not be a cached mzML file (wrong file magic number). Aborting!", filename);
    }

    ifs.seekg(0, ifs.end); // set file pointer to end
    ifs.seekg(ifs.tellg(), ifs.beg); // set file pointer to end, in forward direction
    ifs.seekg(- static_cast<int>(sizeof(exp_size) + sizeof(chrom_size)), ifs.cur); // move two fields to the left, start reading
    ifs.read((char*)&exp_size, sizeof(exp_size));
    ifs.read((char*)&chrom_size, sizeof(chrom_size));
    ifs.seekg(sizeof(file_identifier), ifs.beg); // set file pointer to beginning (after identifier), start reading

    exp_reading.reserve(exp_size);
    startProgress(0, exp_size + chrom_size, "reading binary data");
    for (Size i = 0; i < exp_size; i++)
    {
      setProgress(i);
      SpectrumType spectrum;
      readSpectrum(spectrum, ifs);
      exp_reading.addSpectrum(spectrum);
    }
    std::vector<ChromatogramType> chromatograms;
    for (Size i = 0; i < chrom_size; i++)
    {
      setProgress(i);
      ChromatogramType chromatogram;
      readChromatogram(chromatogram, ifs);
      chromatograms.push_back(chromatogram);
    }
    exp_reading.setChromatograms(chromatograms);

    ifs.close();
    endProgress();
  }

  const std::vector<std::streampos>& CachedMzMLHandler::getSpectraIndex() const
  {