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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 <[email protected]> |
.\" |
.\" %%%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.\" manual page may be incorrect or out-of-date.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 |
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