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():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
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
This page is part of release 4.09 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/.
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