Method Write

lib/mdflib/mdflib/src/dg3block.cpp:90–143

}

uint64_t Dg3Block::Write(std::streambuf& buffer) {
  const bool update =
      FilePosition() > 0;  // Write or update the values inside the block
  nof_cg_blocks_ = static_cast<uint16_t>(cg_list_.size());
  nof_record_id_ = nof_cg_blocks_ > 1 ? 1 : 0;
  if (!update) {
    block_type_ = "DG";
    block_size_ = (2 + 2) + (4 * 4) + 2 + 2 + 4;
    link_list_.resize(4, 0);
  }

  uint64_t bytes = update ? MdfBlock::Update(buffer) : MdfBlock::Write(buffer);
  bytes += WriteNumber(buffer, nof_cg_blocks_);
  bytes += WriteNumber(buffer, nof_record_id_);
  const std::vector<uint8_t> reserved(4, 0);
  bytes += WriteByte(buffer, reserved);

  if (tr_block_ && Link(kIndexTr) <= 0) {
    tr_block_->Write(buffer);
    UpdateLink(buffer, kIndexTr, tr_block_->FilePosition());
  }

  for (size_t cg_index = 0; cg_index < cg_list_.size(); ++cg_index) {
    auto &cg3 = cg_list_[cg_index];
    if (!cg3) {
      continue;
    }
    cg3->Write(buffer);
    if (cg_index == 0) {
      UpdateLink(buffer, kIndexCg, cg3->FilePosition());
    } else {
      auto &prev = cg_list_[cg_index - 1];
      if (prev) {
        prev->UpdateLink(buffer, kIndexNext, cg3->FilePosition());
      }
    }
  }

  for (size_t ii = 0; ii < block_list_.size(); ++ii) {
    auto &data = block_list_[ii];
    if (!data) {
      continue;
    }
    if (data->FilePosition() > 0) {
      continue;
    }
    data->Write(buffer);
    if (ii == 0) {
      UpdateLink(buffer, kIndexData, data->FilePosition());
    }
  }

  return bytes;
}

void Dg3Block::AddCg3(std::unique_ptr<Cg3Block> &cg3) {
  cg3->Init(*this);