bionic (3) iswblank.3.gz

NAME

       iswblank - test for whitespace wide character

SYNOPSIS

       #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

       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

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

ATTRIBUTES

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

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

CONFORMING TO

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

NOTES

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

SEE ALSO

       isblank(3), iswctype(3)

COLOPHON

       This page is part of release 4.15 of  the  Linux  man-pages  project.   A  description  of  the  project,
       information   about   reporting   bugs,   and   the  latest  version  of  this  page,  can  be  found  at
       https://www.kernel.org/doc/man-pages/.