iswctype - wide character classification
int iswctype(wint_t wc, wctype_t desc);
If wc is a wide character having the character property designated by desc (or in other words: belongs to the character class designated by desc), the iswctype function returns non-zero. Otherwise it returns zero. If wc is WEOF, zero is returned.
desc must be a character property descriptor returned by the wctype function.
The iswctype function returns non-zero if the wc has the designated property. Otherwise it returns 0.
ISO/ANSI C, UNIX98
wctype(3), iswalnum(3), iswalpha(3), iswblank(3), iswcntrl(3), iswdigit(3), iswgraph(3), iswlower(3), iswprint(3), iswpunct(3), iswspace(3), iswupper(3), iswxdigit(3)
The behaviour of iswctype depends on the LC_CTYPE category of the current locale.