type recordTransform struct {
	reader io.Reader
	// recordDelimiter can be up to 2 characters.
	recordDelimiter []byte
	oneByte         []byte
	useOneByte      bool
}

func (rr *recordTransform) Read(p []byte) (n int, err error) {
	if rr.useOneByte {
		p[0] = rr.oneByte[0]
		rr.useOneByte = false
		n, err = rr.reader.Read(p[1:])
		n++
	} else {
		n, err = rr.reader.Read(p)
	}

	if err != nil {

	}
	csvIn := io.Reader(readCloser)
	if args.RecordDelimiter != "\n" {
		csvIn = &recordTransform{
			reader:          readCloser,
			recordDelimiter: []byte(args.RecordDelimiter),
			oneByte:         make([]byte, len(args.RecordDelimiter)-1),
		}
	}

	r := &Reader{
		args:       args,
		buf:        bufio.NewReaderSize(csvIn, csvSplitSize*2),
		readCloser: readCloser,