Method populateBlocks

src/basicio.cpp:1064–1094

}

size_t RemoteIo::Impl::populateBlocks(size_t lowBlock, size_t highBlock) {
  // optimize: ignore all true blocks on left & right sides.
  while (!blocksMap_[lowBlock].isNone() && lowBlock < highBlock)
    lowBlock++;
  while (!blocksMap_[highBlock].isNone() && highBlock > lowBlock)
    highBlock--;

  size_t rcount = 0;
  if (blocksMap_[highBlock].isNone()) {
    std::string data;
    getDataByRange(lowBlock, highBlock, data);
    rcount = data.length();
    if (rcount == 0) {
      throw Error(ErrorCode::kerErrorMessage, "Data By Range is empty. Please check the permission.");
    }
    auto source = reinterpret_cast<byte*>(const_cast<char*>(data.c_str()));
    size_t remain = rcount;
    size_t totalRead = 0;
    size_t iBlock = (rcount == size_) ? 0 : lowBlock;

    while (remain) {
      auto allow = std::min<size_t>(remain, blockSize_);
      blocksMap_[iBlock].populate(&source[totalRead], allow);
      remain -= allow;
      totalRead += allow;
      iBlock++;
    }
  }

  return rcount;
}

RemoteIo::Impl::~Impl() {
  delete[] blocksMap_;