func (s *Scanner) readType() (plumbing.ObjectType, byte, error) {
var c byte
var err error
if c, err = s.r.ReadByte(); err != nil {
return plumbing.ObjectType(0), 0, err
}
typ := parseType(c)
return typ, c, nil
}
func parseType(b byte) plumbing.ObjectType {
return plumbing.ObjectType((b & maskType) >> firstLengthBits)
}