iswblank man page on Archlinux

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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-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  nonzero  if	wc is a wide character
       belonging to the wide-character class "blank".	Otherwise  it  returns
       zero.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The  iswblank()	function  is  thread-safe  with exceptions.  It can be
       safely used in multithreaded applications, as long as  setlocale(3)  is
       not called to change the locale during its execution.

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 3.65 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				  2014-02-10			   ISWBLANK(3)
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