WCTYPE

wctype ? wide character classification

#include <wctype.h>

wctype_t wctype (const char *name);

The wctype_t type represents a property which a wide character may or may not have. In other words, it represents a class of wide characters. This type’s nature is implementation dependent, but the special value (wctype_t)0 denotes an invalid property. Nonzero wctype_t values can be passed to the iswctype function to actually test whether a given wide character has the property.

The wctype function returns a property, given by its name. The set of valid names depends on the LC_CTYPE category of the current locale, but the following names are valid in all locales.

  "alnum" - realizes the isalnum classification function
  "alpha" - realizes the isalpha classification function
  "blank" - realizes the isblank classification function
  "cntrl" - realizes the iscntrl classification function
  "digit" - realizes the isdigit classification function
  "graph" - realizes the isgraph classification function
  "lower" - realizes the islower classification function
  "print" - realizes the isprint classification function
  "punct" - realizes the ispunct classification function
  "space" - realizes the isspace classification function
  "upper" - realizes the isupper classification function
  "xdigit" - realizes the isxdigit classification function

The wctype function returns a property descriptor if the name is valid. Otherwise it returns (wctype_t)0.

ISO/ANSI C, UNIX98

iswctype(3)

The behaviour of wctype depends on the LC_CTYPE category of the current locale.