3.28 wctype—get wide-character classification type

Synopsis

     #include <wctype.h>
     wctype_t wctype(const char *c);
     

Description
wctype is a function which takes a string c and gives back the appropriate wctype_t type value associated with the string, if one exists. The following values are guaranteed to be recognized: "alnum", "alpha", "blank", "cntrl", "digit", "graph", "lower", "print", "punct", "space", "upper", and "xdigit".

Returns
wctype returns 0 and sets errno to EINVAL if the given name is invalid. Otherwise, it returns a valid non-zero wctype_t value.

Portability
wctype is C99.

No supporting OS subroutines are required.