Method CreateMd4Block

lib/mdflib/mdflib/src/mdfblock.cpp:828–855

void MdfBlock::UpdateBlockSize(std::FILE *file, size_t bytes) { auto pos = FilePosition(); if (pos <= 0) { throw std::runtime_error("Invalid file position"); } if (file == nullptr) { throw std::runtime_error("File pointer is null"); } if (IsMdf4()) { if (block_length_ != static_cast (bytes)) { block_length_ = static_cast (bytes); pos += 8;

}
*/
void MdfBlock::CreateMd4Block() {
  const auto *metadata = MetaData();
  if (md_comment_ && md_comment_->BlockType() == "MD") {
    // Already done
    return;
  }

  // Create an MD block and optional copy the text if it was a TX block
  auto md4 = std::make_unique<Md4Block>();

  std::ostringstream root_name;
  root_name << BlockType() << "comment";

  auto xml = CreateXmlFile();
  xml->RootName(root_name.str());

  if (md_comment_) {
    const auto *tx4 = dynamic_cast<const Tx4Block *>(md_comment_.get());
    xml->SetProperty("TX", tx4 != nullptr ? tx4->TxComment() : std::string());
  }
  
  if (this->BlockType() == "HD") {
    xml->SetProperty("TX", std::string());
  }

  md4->XmlSnippet(xml->WriteString(true));
  md_comment_ = std::move(md4);
}

IMetaData *MdfBlock::CreateMetaData() {
  CreateMd4Block();