static function charCodeAt($s, $index) { return haxe_Utf8::uord(haxe_Utf8::sub($s, $index, 1)); }
static function sub($s, $pos, $len) { $start = com_wiris_system_Utf8_3($len, $pos, $s); $end = com_wiris_system_Utf8_4($len, $pos, $s, $start); return haxe_Utf8::sub($s, $start, $end - $start); }