func()

in internal/encoding/types.go [1226:1282]

• 51 lines of code
• 13 McCabe index (conditional complexity)

func (a *arraySymbol) Unmarshal(r *buffer.Buffer) error {
	length, err := readArrayHeader(r)
	if err != nil {
		return err
	}

	const typeSize = 2 // assume all symbols are at least 2 bytes
	if length*typeSize > int64(r.Len()) {
		return fmt.Errorf("invalid length %d", length)
	}

	aa := (*a)[:0]
	if int64(cap(aa)) < length {
		aa = make([]Symbol, length)
	} else {
		aa = aa[:length]
	}

	type_, err := readType(r)
	if err != nil {
		return err
	}
	switch type_ {
	case TypeCodeSym8:
		for i := range aa {
			size, err := r.ReadByte()
			if err != nil {
				return err
			}

			buf, ok := r.Next(int64(size))
			if !ok {
				return errors.New("invalid length")
			}
			aa[i] = Symbol(buf)
		}
	case TypeCodeSym32:
		for i := range aa {
			buf, ok := r.Next(4)
			if !ok {
				return errors.New("invalid length")
			}
			size := int64(binary.BigEndian.Uint32(buf))

			buf, ok = r.Next(size)
			if !ok {
				return errors.New("invalid length")
			}
			aa[i] = Symbol(buf)
		}
	default:
		return fmt.Errorf("invalid type for []Symbol %02x", type_)
	}

	*a = aa
	return nil
}