wctype, wctype_l—get wide-character classification type #include <wctype.h>
wctype_t wctype(const char *c);
#include <wctype.h>
wctype_t wctype_l(const char *c, locale_t locale);
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".
wctype_l is like wctype but performs the function based on the
locale specified by the locale object locale. If locale is
LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
Returns
wctype, wctype_l return 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.
wctype_l is POSIX-1.2008.
No supporting OS subroutines are required.