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iswspace - test for whitespace wide character
#include <wctype.h>
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",
"xdigit", "punct".
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 control 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
isspace(3)
, iswctype(3)
The behaviour
of iswspace depends on the LC_CTYPE category of the current locale.
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