iswctype
(3)wide-character classification
#include <wctype.h> int iswctype(wint_t wc, wctype_t desc);
LIBRARY
DESCRIPTION
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), then the iswctype() function returns nonzero. Otherwise, it returns zero. If wc is WEOF, zero is returned.
desc must be a character property descriptor returned by the wctype(3) function.