Method GetWriter

libs/coding/files_container.cpp:370–418

}

std::unique_ptr<FilesContainerWriter> FilesContainerW::GetWriter(Tag const & tag)
{
  ASSERT(!m_finished, ());

  InfoContainer::const_iterator it = find_if(m_info.begin(), m_info.end(), EqualTag(tag));
  if (it != m_info.end())
  {
    if (it + 1 == m_info.end())
    {
      m_info.pop_back();

      if (m_info.empty())
        StartNew();
      else
        m_needRewrite = true;
    }
    else
    {
      DeleteSection(it->m_tag);
    }
  }

  if (m_needRewrite)
  {
    m_needRewrite = false;

    ASSERT(!m_info.empty(), ());

    uint64_t const curr = m_info.back().m_offset + m_info.back().m_size;
    auto writer = std::make_unique<TruncatingFileWriter>(m_name);
    writer->Seek(curr);
    writer->WritePaddingByPos(kSectionAlignment);

    m_info.emplace_back(tag, writer->Pos());
    ASSERT_EQUAL(m_info.back().m_offset % kSectionAlignment, 0, ());
    return writer;
  }
  else
  {
    SaveCurrentSize();

    auto writer = std::make_unique<FilesContainerWriter>(m_name, FileWriter::OP_APPEND);
    writer->WritePaddingByPos(kSectionAlignment);

    m_info.emplace_back(tag, writer->Pos());
    ASSERT_EQUAL(m_info.back().m_offset % kSectionAlignment, 0, ());
    return writer;
  }
}

void FilesContainerW::Write(std::string const & fPath, Tag const & tag)
{