Method peekByte

reader_parser.go:609–619

peekByte returns the next byte. When retain is false, fully consumed chunks are discarded before reading more data. SYS-REQ-116

(retain bool)

// are discarded before reading more data.
// SYS-REQ-116
func (rp *ReaderParser) peekByte(retain bool) (byte, error) {
	for rp.pos >= len(rp.buf) {
		if !retain {
			rp.discardConsumed()
		}
		if err := rp.readMore(); err != nil {
			return 0, err
		}
	}
	return rp.buf[rp.pos], nil
}

// SYS-REQ-116
func (rp *ReaderParser) readMore() error {