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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; 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.

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 3.25 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)
 

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