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

NAME
       iswblank - test for whitespace wide character

SYNOPSIS
       #include 

       int iswblank(wintt wc);

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

       iswblank():
              XOPENSOURCE >= 600 || ISOC99SOURCE ||
              POSIXCSOURCE >= 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
       For   an   explanation   of   the  terms  used  in  this  section,  see
       attributes(7).

       ┌───────────┬───────────────┬────────────────┐
       │Interface  │ Attribute     │ Value          │
       ├───────────┼───────────────┼────────────────┤
       │iswblank() │ Thread safety │ MT-Safe locale │
       └───────────┴───────────────┴────────────────┘
CONFORMING TO
       POSIX.1-2001.

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

SEE ALSO
       isblank(3), iswctype(3)

COLOPHON
       This  page  is  part of release 3.53 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)