iswxdigit - Test for hexadecimal wide-character digit

Definition	#include <wctype.h> int iswxdigit(wint_t wc); iswxdigit tests whether the wide character wc is a hexadecimal digit (0-9, A-F or a-f). In all cases, wc is an argument of type wint_t, the value of which must be a wide character code corresponding to a valid character in the current locale or must equal the value of the macro WEOF. If the argument wc has any other value, the behavior is undefined.
Return val.	!= 0 0	wc is a hexadecimal digit. wc is not a hexadecimal digit
Notes	This version of the C runtime system only supports one-byte characters as wide character codes. iswxdigit is implemented both as a function and as a macro (see section “Functions and macros”). The behavior of iswxdigit is determined by the class xdigit of the current locale. The current locale is the C locale, unless it was explicitly changed using setlocale.
See also	iswalnum, iswalpha, iswcntrl, iswdigit, iswgraph, iswlower, iswprint, iswpunct, iswspace, iswupper, isxdigit