wctype(3) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON

wctype(3)               Library Functions Manual               wctype(3)

NAME         top

       wctype - wide-character classification

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <wctype.h>

       wctype_t wctype(const char *name);

DESCRIPTION         top

       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(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         top

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

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────┬───────────────┬────────────────┐
       │ Interface                    Attribute     Value          │
       ├──────────────────────────────┼───────────────┼────────────────┤
       │ wctype()                     │ Thread safety │ MT-Safe locale │
       └──────────────────────────────┴───────────────┴────────────────┘

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, C99.

NOTES         top

       The behavior of wctype() depends on the LC_CTYPE category of the
       current locale.

SEE ALSO         top

       iswctype(3)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                      wctype(3)

Pages that refer to this page: iswctype(3)regex(7)