linux man page for iswblank

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

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 '	'.

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 3.27 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
								    2010-09-20							       ISWBLANK(3)