Method prependToAndReset

src/core/utils/WriteStream.cpp:117–132

}

bool MemoryWriteStream::prependToAndReset(const std::shared_ptr<MemoryWriteStream>& destStream) {
  if (!destStream) {
    return false;
  }
  if (bytesWritten() == 0) {
    return true;
  }
  if (destStream->bytesWritten() == 0) {
    destStream->buffer.swap(buffer);
    return true;
  }
  buffer.insert(buffer.end(), destStream->buffer.begin(), destStream->buffer.end());
  destStream->buffer.swap(buffer);
  reset();
  return true;
}

size_t MemoryWriteStream::bytesWritten() const {
  return buffer.size();