ISWBLANK
Updated: 2015-08-08
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NAME
iswblank - test for whitespace wide characterSYNOPSIS
#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.ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).Interface | Attribute | Value |
iswblank() | Thread safety | MT-Safe locale |
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.NOTES
The behavior of iswblank() depends on the LC_CTYPE category of the current locale.SEE ALSO
isblank(3), iswctype(3)COLOPHON
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Index
- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUE
- ATTRIBUTES
- CONFORMING TO
- NOTES
- SEE ALSO
- COLOPHON