func()

in double.go [109:152]

• 36 lines of code
• 9 McCabe index (conditional complexity)

func (d *Decoder) decDouble(flag int32) (interface{}, error) {
	var (
		err error
		tag byte
	)

	if flag != TAG_READ {
		tag = byte(flag)
	} else {
		tag, _ = d.ReadByte()
	}
	switch tag {
	case BC_LONG_INT:
		return d.decInt32(TAG_READ)

	case BC_DOUBLE_ZERO:
		return float64(0), nil

	case BC_DOUBLE_ONE:
		return float64(1), nil

	case BC_DOUBLE_BYTE:
		var i8 int8
		err = binary.Read(d.reader, binary.BigEndian, &i8)
		return float64(i8), perrors.WithStack(err)

	case BC_DOUBLE_SHORT:
		var i16 int16
		err = binary.Read(d.reader, binary.BigEndian, &i16)
		return float64(i16), perrors.WithStack(err)

	case BC_DOUBLE_MILL:
		var i32 int32
		err = binary.Read(d.reader, binary.BigEndian, &i32)
		return float64(i32) / 1000, perrors.WithStack(err)

	case BC_DOUBLE:
		var f64 float64
		err = binary.Read(d.reader, binary.BigEndian, &f64)
		return f64, perrors.WithStack(err)
	}

	return nil, perrors.Errorf("decDouble parse double wrong tag:%d-%#x", int(tag), tag)
}