Method CopyDataToBuffer

lib/mdflib/mdflib/src/dz4block.cpp:115–156

}

uint64_t Dz4Block::CopyDataToBuffer(std::streambuf& from_file,
                                  std::vector<uint8_t> &dest,
                                  uint64_t &buffer_index) const {
  if (data_position_ == 0 || orig_data_length_ == 0 || data_length_ == 0) {
    return 0;
  }

  SetFilePosition(from_file, data_position_);

  uint64_t count = 0;
  switch (static_cast<Dz4ZipType>(type_)) {
    case Dz4ZipType::Deflate: {
      ByteArray temp(static_cast<size_t>(data_length_), 0);
      from_file.sgetn( reinterpret_cast<char*>(temp.data()),
                              static_cast<std::streamsize>(temp.size()) );
      ByteArray out(static_cast<size_t>(orig_data_length_), 0);
      Inflate(temp, out);
      count = orig_data_length_;
      memcpy(dest.data() + buffer_index, out.data(), static_cast<size_t>(count) );
      buffer_index += count;
      break;
    }

    case Dz4ZipType::TransposeAndDeflate: {
      ByteArray temp(static_cast<size_t>(data_length_), 0);
      from_file.sgetn(reinterpret_cast<char*>(temp.data()),
                      static_cast<std::streamsize>(temp.size()) );
      ByteArray out(static_cast<size_t>( orig_data_length_ ), 0);
      Inflate(temp, out);
      InvTranspose(out, parameter_);

      count = orig_data_length_;
      memcpy(dest.data() + buffer_index, out.data(), static_cast<size_t>(count) );
      buffer_index += count;
      break;
    }

    default:
      break;
  }
  return count;
}

bool Dz4Block::Data(const std::vector<uint8_t> &uncompressed_data) {
  bool compress = true;