Test a wide character to see if it's a hexadecimal digit
#include <wctype.h> int iswxdigit( wint_t wc );
- The wide character you want to test. This argument must be a wide-character code that corresponds to a valid character in the current locale, or must be WEOF; otherwise, the function's behavior is undefined.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The iswxdigit() function tests if the argument wc is a hexadecimal wide character of the class xdigit. In the C locale, this class includes the characters 0 to 9, and A to F.
A nonzero value if the character is a member of the class xdigit, or 0 otherwise.
The result is valid only for wchar_t arguments and WEOF.