iswblank - test for whitespace wide character


SYNOPSIS

       #include <wctype.h>

       int iswblank (wint_t wc);


DESCRIPTION

       The  iswblank function is the wide-character equivalent of
       the isblank function. It tests whether wc is a wide  char­
       acter 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'.


RETURN VALUE

       The  iswblank  function  returns  non-zero if wc is a wide
       character belonging to the wide character  class  "blank".
       Otherwise it returns zero.


CONFORMING TO

       This function is a GNU extension.


SEE ALSO

       isblank(3), iswctype(3)


NOTES

       The behaviour of iswblank depends on the LC_CTYPE category
       of the current locale.


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