iswcntrl
Section: C Library Functions (3)
Updated: 2022-12-15
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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
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)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- NOTES
-
- SEE ALSO
-
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