Method ForEach

libs/map/gps_track_storage.cpp:219–249

}

void GpsTrackStorage::ForEach(std::function<bool(TItem const & item)> const & fn)
{
  ASSERT(m_stream.is_open(), ());

  size_t i = 0;

  // Set read position to the first item
  m_stream.seekg(GetItemOffset(i), ios::beg);
  if (!m_stream.good())
    MYTHROW(ReadException, ("File:", m_filePath));

  vector<char> buff(min(kItemBlockSize, m_itemCount) * kPointSize);
  for (; i < m_itemCount;)
  {
    size_t const n = min(m_itemCount - i, kItemBlockSize);

    m_stream.read(&buff[0], n * kPointSize);
    if (!m_stream.good())
      MYTHROW(ReadException, ("File:", m_filePath));

    for (size_t j = 0; j < n; ++j)
    {
      TItem item;
      Unpack(&buff[0] + j * kPointSize, item);
      if (!fn(item))
        return;
    }

    i += n;
  }
}