Originální popis anglicky:
iswblank - test for whitespace wide character
Návod, kniha: Linux Programmer's Manual
#include <wctype.h>
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 "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 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.
isblank(3),
iswctype(3)
The behaviour of
iswblank depends on the LC_CTYPE category of the current
locale.
