Section: Linux Programmer's Manual (3)
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iswblank - test for whitespace wide character
int iswblank(wint_t wc);
The iswblank() function is the wide-character equivalent of the
isblank() 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
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",
The wide character class "blank" always contains at least the space character
and the control character '\t'.
The iswblank() function returns non-zero if wc is a wide character
belonging to the wide character class "blank". Otherwise it returns zero.
This function is a GNU extension.
The behaviour of iswblank() depends on the LC_CTYPE category of the
- RETURN VALUE
- CONFORMING TO
- SEE ALSO
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