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.\"
.th iswcntrl 3 2021-03-22 "gnu" "linux programmer's manual"
.sh name
iswcntrl \- test for control wide character
.sh synopsis
.nf
.b #include <wctype.h>
.pp
.bi "int iswcntrl(wint_t " wc );
.fi
.sh description
the
.br iswcntrl ()
function is the wide-character equivalent of the
.br iscntrl (3)
function.
it tests whether
.i wc
is a wide character
belonging to the wide-character class "cntrl".
.pp
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".
.pp
for an unsigned char
.ir c ,
.i iscntrl(c)
implies
.ir iswcntrl(btowc(c)) ,
but not vice versa.
.sh return value
the
.br iswcntrl ()
function returns nonzero if
.i wc
is a
wide character belonging to the wide-character class "cntrl".
otherwise, it returns zero.
.sh attributes
for an explanation of the terms used in this section, see
.br attributes (7).
.ad l
.nh
.ts
allbox;
lbx lb lb
l l l.
interface attribute value
t{
.br iswcntrl ()
t} thread safety mt-safe locale
.te
.hy
.ad
.sp 1
.sh conforming to
posix.1-2001, posix.1-2008, c99.
.sh notes
the behavior of
.br iswcntrl ()
depends on the
.b lc_ctype
category of the
current locale.
.sh see also
.br iscntrl (3),
.br iswctype (3)
.sh colophon
this page is part of release 5.13 of the linux
.i 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/.
.so man3/getcwd.3
.so man3/sigvec.3
.so man3/exec.3
.\" copyright (c) 2016 michael kerrisk <mtk.manpages@gmail.com>
.\"
.\" %%%license_start(verbatim)
.\" permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" since the linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. the author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. the author(s) may not