ISWBLANK(3)		   Linux Programmers Manual		  ISWBLANK(3)



NAME
       iswblank - test for whitespace wide character

SYNOPSIS
       #include 

       int iswblank(wint_t wc);

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

       iswblank(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; 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-charac
       ter 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
       POSIX.1-2001.

NOTES
       The behavior of iswblank() depends on the LC_CTYPE category of the cur
       rent locale.

SEE ALSO
       isblank(3), iswctype(3)

COLOPHON
       This  page  is  part of release 3.05 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/.



GNU				  2007-07-26			   ISWBLANK(3)