iswcntrl(3) — Linux manual page

iswcntrl(3)             Library Functions Manual             iswcntrl(3)

NAME

       iswcntrl - test for control wide character

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wctype.h>

       int iswcntrl(wint_t wc);

DESCRIPTION

       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

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

ATTRIBUTES

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

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

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

SEE ALSO

       iscntrl(3), iswctype(3)

COLOPHON

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

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

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