|ISWBLANK(3)||Linux Programmer's Manual||ISWBLANK(3)|
NAME¶iswblank - test for whitespace wide character
int iswblank(wint_t wc);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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).
|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 4.16 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/.