Method encodeUtf16

src/helper.cpp:724–734

* Returns a tuple (high,low) as UTF-16 */

 *	Returns a tuple (high,low) as UTF-16
 */
std::tuple<uint16_t, uint16_t> Helper::encodeUtf16(uint32_t cp) {
	if( cp <= 0xD7FF || (cp >= 0xE000 && cp <= 0xFFFF) ) {
		return std::make_tuple(cp,0);
	} else if( cp >= 0x10000 && cp <= 0x10FFFF ) {
		uint16_t high = ((cp - 0x10000) >> 10) + 0xD800;
		uint16_t low = ((cp - 0x10000) & 0x3FF) + 0xDC00;
		return std::make_tuple(high,low);
	} else {
		return std::make_tuple(cp,0);
	}
}