ISWBLANKSection: Linux Programmer's Manual (3)
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NAMEiswblank - test for whitespace wide character
#include <wctype.h> int iswblank(wint_t wc);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTIONThe 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".
RETURN VALUEThe iswblank() function returns non-zero if wc is a wide character belonging to the wide-character class "blank". Otherwise it returns zero.
NOTESThe behavior of iswblank() depends on the LC_CTYPE category of the current locale.
SEE ALSOisblank(3), iswctype(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.