ISWBLANK(3) Linux Programmer's Manual ISWBLANK(3)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-charac‐
ter 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 cur‐
rent locale.
SEE ALSOisblank(3), iswctype(3)COLOPHON
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GNU 2016-03-15 ISWBLANK(3)
