func()

in decode.go [190:236]

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

func (d *Decoder) decMapType() (reflect.Type, error) {
	var (
		err     error
		arr     [1]byte
		buf     []byte
		tag     byte
		idx     int32
		typ     reflect.Type
		typName string
	)

	buf = arr[:1]
	if _, err = io.ReadFull(d.reader, buf); err != nil {
		return nil, perrors.WithStack(err)
	}
	tag = buf[0]
	if (tag >= BC_STRING_DIRECT && tag <= STRING_DIRECT_MAX) ||
		(tag >= 0x30 && tag <= 0x33) || (tag == BC_STRING) || (tag == BC_STRING_CHUNK) {
		typName, err = d.decString(int32(tag))
		if err != nil {
			return nil, perrors.WithStack(err)
		}

		info, ok := getStructInfo(typName)
		if ok {
			typ = info.typ
		} else {
			typ = reflect.TypeOf(map[interface{}]interface{}{})
		}

		// add to type map
		d.typeRefs.appendTypeRefs(typName, typ)

		return typ, nil
	}

	if idx, err = d.decInt32(int32(tag)); err != nil {
		return nil, perrors.WithStack(err)
	}

	typ = d.typeRefs.Get(int(idx))
	if typ == nil {
		return nil, perrors.Errorf("the type ref index %d is out of range", idx)
	}

	return typ, err
}