ISWBLANK
Section: Linux Programmer's Manual (3)
Updated: 2010-09-20
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NAME
iswblank - test for whitespace wide character
SYNOPSIS
#include <wctype.h>
int iswblank(wint_t wc);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
iswblank():
-
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
_POSIX_C_SOURCE >= 200112L;
or
cc -std=c99
DESCRIPTION
The
iswblank()
function is the wide-character equivalent of the
isblank(3)
function.
It tests whether wc is a wide character
belonging to the wide-character class "blank".
The wide-character class "blank" is a subclass of the wide-character class
"space".
Being a subclass of the wide-character class "space",
the wide-character class "blank" is disjoint from the
wide-character class "graph" and therefore also disjoint
from its subclasses "alnum", "alpha", "upper", "lower", "digit",
"xdigit", "punct".
The wide-character class "blank" always contains
at least the space character
and the control character '\t'.
RETURN VALUE
The
iswblank()
function returns nonzero
if wc is a wide character
belonging to the wide-character class "blank".
Otherwise it returns zero.
CONFORMING TO
POSIX.1-2001.
NOTES
The behavior of
iswblank()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
isblank(3),
iswctype(3)
COLOPHON
This page is part of release 3.27 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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