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; 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 char-
       acter 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-charac-
       ter  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".   Other-
       wise 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 3.25 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)