NAME

       iswblank - test for a blank wide-character code

SYNOPSIS

       #include <wctype.h>

       int iswblank(wint_t wc);

DESCRIPTION

       The  iswblank()  function  shall  test  whether wc is a wide-character code representing a
       character of class blank in the program's current locale; see the Base Definitions  volume
       of IEEE Std 1003.1-2001, Chapter 7, Locale.

       The  wc  argument  is a wint_t, the value of which the application shall ensure is a wide-
       character code corresponding to a valid character in the current locale, or equal  to  the
       value of the macro WEOF. If the argument has any other value, the behavior is undefined.

RETURN VALUE

       The  iswblank()  function  shall  return  non-zero  if  wc is a blank wide-character code;
       otherwise, it shall return 0.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       To ensure  applications  portability,  especially  across  natural  languages,  only  this
       function  and  those  listed  in the SEE ALSO section should be used for classification of
       wide-character codes.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       iswalnum() , iswalpha() , iswcntrl() , iswctype() , iswdigit() , iswgraph() , iswlower() ,
       iswprint()  ,  iswpunct() , iswspace() , iswupper() , iswxdigit() , setlocale() , the Base
       Definitions volume of  IEEE Std 1003.1-2001,  Chapter  7,  Locale,  <stdio.h>,  <wchar.h>,
       <wctype.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .