type namePosition struct {
	offset uint16
	length uint16
}

func (rd *reparseData) addUTF16s(s []uint16) (offset uint16) {
	off := len(rd.pathBuf) * 2
	rd.pathBuf = append(rd.pathBuf, s...)
	return uint16(off)
}

func (rd *reparseData) addString(s string) (offset, length uint16) {
	p := syscall.StringToUTF16(s)