_utf8_to_unified_hangul
unihan_char = _utf8_to_unified_hangul (utf8_char);
extern hcode_type _utf8_to_unified_hangul (hcode_type);
extern hcode_type _utf8_to_unified_hangul(hcode_type);
euc_code = _utf8_to_unified_hangul(utf8_code);
euc_code = _utf8_to_unified_hangul(utf8_code);