iswspace(3) - Linux man page
Name
iswspace - test for whitespace wide characterSynopsis
#include <wctype.h> int iswspace(wint_t wc);
Description
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 aq\faq, aq\naq, aq\raq, aq\taq, aq\vaq.