func readBinary()

in internal/encoding/decode.go [445:480]

• 31 lines of code
• 8 McCabe index (conditional complexity)

func readBinary(r *buffer.Buffer) ([]byte, error) {
	type_, err := readType(r)
	if err != nil {
		return nil, err
	}

	var length int64
	switch type_ {
	case TypeCodeVbin8:
		n, err := r.ReadByte()
		if err != nil {
			return nil, err
		}
		length = int64(n)
	case TypeCodeVbin32:
		buf, ok := r.Next(4)
		if !ok {
			return nil, fmt.Errorf("invalid length for type %#02x", type_)
		}
		length = int64(binary.BigEndian.Uint32(buf))
	default:
		return nil, fmt.Errorf("type code %#02x is not a recognized binary type", type_)
	}

	if length == 0 {
		// An empty value and a nil value are distinct,
		// ensure that the returned value is not nil in this case.
		return make([]byte, 0), nil
	}

	buf, ok := r.Next(length)
	if !ok {
		return nil, errors.New("invalid length")
	}
	return append([]byte(nil), buf...), nil
}