UTF8_END           63 ext/json/utf8_decode.c         return UTF8_END;
UTF8_END          131 ext/json/utf8_decode.c         return utf8->the_index == utf8->the_length ? UTF8_END : UTF8_ERROR;
UTF8_END           43 ext/json/utf8_to_utf16.c             return UTF8_END ? the_index : UTF8_ERROR;