iswblank - test for whitespace wide character
#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
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'.
The
iswblank() function returns nonzero if
wc is a wide character
belonging to the wide-character class "blank". Otherwise, it returns
zero.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| iswblank () |
Thread safety |
MT-Safe locale |
POSIX.1-2001, POSIX.1-2008.
The behavior of
iswblank() depends on the
LC_CTYPE category of the
current locale.
isblank(3),
iswctype(3)