func main() {
	f, _ := os.Open("euckr.xml")
	defer f.Close()

	r, _ := cp949.NewReader(f)

	b := make([]byte, 10*1024)
	c, _ := r.Read(b)

	fmt.Println(c)
	fmt.Printf("%s", b[:c])
}
func unmarshalCp949XML(data []byte, v interface{}) error {
	d := xml.NewDecoder(bytes.NewBuffer(data))
	d.CharsetReader = func(c string, i io.Reader) (io.Reader, error) {
		if c != "cp949" && c != "euc-kr" {
			return nil, errors.New("unexpect charset: " + c)
		}

		r, err := cp949.NewReader(i)
		if err != nil {
			return nil, err
		}

		return r, nil
	}

	return d.Decode(v)
}