wctype h status - chasonr/djgpp-lib GitHub Wiki
wctype.h provides all symbols required by C11/C17.
The functions do not currently respect the character set configured by setlocale().
wctype.h does not provide the following symbols required by SuSv4:
locale_tiswalnum_liswalpha_liswblank_liswcntrl_liswctype_liswdigit_liswgraph_liswlower_liswprint_liswpunct_liswspace_liswupper_liswxdigit_ltowctrans_ltowlower_ltowupper_lwctrans_lwctype_l