NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

ISWBLANK(3)               Linux Programmer's Manual              ISWBLANK(3)

NAME         top

       iswblank - test for whitespace wide character

SYNOPSIS         top

       #include <wctype.h>

       int iswblank(wint_t wc);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       iswblank():
              _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

DESCRIPTION         top

       The iswblank() function is the wide-character equivalent of the
       isblank(3) 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'.

RETURN VALUE         top

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

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌───────────┬───────────────┬────────────────┐
       │Interface  Attribute     Value          │
       ├───────────┼───────────────┼────────────────┤
       │iswblank() │ Thread safety │ MT-Safe locale │
       └───────────┴───────────────┴────────────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.

NOTES         top

       The behavior of iswblank() depends on the LC_CTYPE category of the
       current locale.

SEE ALSO         top

       isblank(3), iswctype(3)

COLOPHON         top

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GNU                              2016-03-15                      ISWBLANK(3)