if pr == nil {
		return 0, 0
	}
	return pr.scannedReader.BytesRead(), pr.processedReader.BytesRead()
}

func newProgressReader(rc io.ReadCloser, compType CompressionType) (*progressReader, error) {
	if rc == nil {
		return nil, errors.New("newProgressReader: nil reader provided")
	}
	scannedReader := newCountUpReader(rc)
	pr := progressReader{
		rc:            rc,
		scannedReader: scannedReader,