write_case       1452 ext/mbstring/ucgendat/ucgendat.c       write_case(out, upper, upper_used, 1);
write_case       1458 ext/mbstring/ucgendat/ucgendat.c       write_case(out, lower, lower_used, !upper_used);
write_case       1464 ext/mbstring/ucgendat/ucgendat.c       write_case(out, title, title_used, !(upper_used||lower_used));