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WCTYPE(3)                  Linux Programmer's Manual                 WCTYPE(3)
NAME
       wctype - wide-character classification
SYNOPSIS
       #include <wctype.h>
       wctype_t wctype(const char *name);
DESCRIPTION
       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  charac-
       ters.   This type's nature is implementation-dependent, but the special
       value (wctype_t) 0 denotes an invalid property.  Nonzero wctype_t  val-
       ues  can be passed to the iswctype(3) 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(3) classification function
           "alpha" - realizes the isalpha(3) classification function
           "blank" - realizes the isblank(3) classification function
           "cntrl" - realizes the iscntrl(3) classification function
           "digit" - realizes the isdigit(3) classification function
           "graph" - realizes the isgraph(3) classification function
           "lower" - realizes the islower(3) classification function
           "print" - realizes the isprint(3) classification function
           "punct" - realizes the ispunct(3) classification function
           "space" - realizes the isspace(3) classification function
           "upper" - realizes the isupper(3) classification function
           "xdigit" - realizes the isxdigit(3) classification function
RETURN VALUE
       The wctype() function returns a property  descriptor  if  the  name  is
       valid.  Otherwise, it returns (wctype_t) 0.
ATTRIBUTES
       For   an   explanation   of   the  terms  used  in  this  section,  see
       attributes(7).
       +----------+---------------+----------------+
       |Interface | Attribute     | Value          |
       +----------+---------------+----------------+
       |wctype()  | Thread safety | MT-Safe locale |
       +----------+---------------+----------------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.
NOTES
       The behavior of wctype() depends on the LC_CTYPE category of  the  cur-
       rent locale.
SEE ALSO
       iswctype(3)
COLOPHON
       This  page  is  part of release 4.15 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at
       https://www.kernel.org/doc/man-pages/.
GNU                               2015-08-08                         WCTYPE(3)