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ISWSPACE(3) Linux Programmer's Manual ISWSPACE(3)
iswspace - test for whitespace wide character
int iswspace(wint_t wc);
The iswspace function is the wide-character equivalent of the isspace function. It tests
whether wc is a wide character belonging to the wide character class "space".
The wide character class "space" is disjoint from the wide character class "graph" and
therefore also disjoint from its subclasses "alnum", "alpha", "upper", "lower", "digit",
The wide character class "space" contains the wide character class "blank".
The wide character class "space" always contains at least the space character and the con-
trol characters '\f', '\n', '\r', '\t', '\v'.
The iswspace function returns non-zero if wc is a wide character belonging to the wide
character class "space". Otherwise it returns zero.
ISO/ANSI C, UNIX98
The behaviour of iswspace depends on the LC_CTYPE category of the current locale.
GNU 1999-07-25 ISWSPACE(3)
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