func()

in list.go [409:453]

• 40 lines of code
• 12 McCabe index (conditional complexity)

func (d *Decoder) readUntypedList(tag byte) (interface{}, error) {
	isVariableArr := tag == BC_LIST_VARIABLE_UNTYPED

	var length int
	if listFixedUntypedLenTag(tag) {
		length = int(tag - _listFixedUntypedLenTagMin)
	} else if tag == BC_LIST_FIXED_UNTYPED {
		ii, err := d.decInt32(TAG_READ)
		if err != nil {
			return nil, perrors.WithStack(err)
		}
		length = int(ii)
	} else if isVariableArr {
		length = 0
	} else {
		return nil, perrors.Errorf("error untyped list tag: %x", tag)
	}

	ary := make([]interface{}, length)
	aryValue := reflect.ValueOf(ary)
	holder := d.appendRefs(aryValue)

	for j := 0; j < length || isVariableArr; j++ {
		it, err := d.DecodeValue()
		if err != nil {
			if perrors.Is(err, io.EOF) && isVariableArr {
				break
			}
			return nil, perrors.WithStack(err)
		}

		if isVariableArr {
			if it != nil {
				aryValue = reflect.Append(aryValue, EnsureRawValue(it))
			} else {
				aryValue = reflect.Append(aryValue, reflect.Zero(aryValue.Type().Elem()))
			}
			holder.change(aryValue)
		} else {
			ary[j] = EnsureRawAny(it)
		}
	}

	return holder, nil
}