trusty (3) iswblank.3.gz

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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():
              _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
              or cc -std=c99


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.


CONFORMING TO
       POSIX.1-2001.


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 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.