iswblank — test for whitespace wide character
iswblank() function is
the wide-character equivalent of the isblank(3) function. It
wc is a
wide character belonging to the wide-character class
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'.
returns nonzero if
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).
||Thread safety||MT-Safe locale|
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