ISWCNTRL
Section: Linux Programmer's Manual (3)
Updated: 2021-03-22
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NAME
iswcntrl - test for control wide character
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
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
NOTES
The behavior of
iswcntrl()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
iscntrl(3),
iswctype(3)
COLOPHON
This page is part of release 5.11 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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