iswcntrl(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

ISWCNTRL(3)             Linux Programmer's Manual            ISWCNTRL(3)

NAME         top

       iswcntrl - test for control wide character

SYNOPSIS         top

       #include <wctype.h>

       int iswcntrl(wint_t wc);

DESCRIPTION         top

       The iswcntrl() function is the wide-character equivalent of the
       iscntrl(3) function.  It tests whether wc is a wide character
       belonging to the wide-character class "cntrl".

       The wide-character class "cntrl" is disjoint from the wide-
       character class "print" and therefore also disjoint from its
       subclasses "graph", "alpha", "upper", "lower", "digit", "xdigit",
       "punct".

       For an unsigned char c, iscntrl(c) implies iswcntrl(btowc(c)),
       but not vice versa.

RETURN VALUE         top

       The iswcntrl() function returns nonzero if wc is a wide character
       belonging to the wide-character class "cntrl".  Otherwise, it
       returns zero.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌───────────────────────────────┬───────────────┬────────────────┐
       │Interface                      Attribute     Value          │
       ├───────────────────────────────┼───────────────┼────────────────┤
       │iswcntrl()                     │ Thread safety │ MT-Safe locale │
       └───────────────────────────────┴───────────────┴────────────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES         top

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

SEE ALSO         top

       iscntrl(3), iswctype(3)

COLOPHON         top

       This page is part of release 5.12 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                            2021-03-22                    ISWCNTRL(3)

Pages that refer to this page: isalpha(3)iswctype(3)