NAME

       iswcntrl - test for a control wide-character code

SYNOPSIS

       #include <wctype.h>

       int iswcntrl(wint_t wc);

DESCRIPTION

       The  iswcntrl()  function  shall  test  whether wc is a wide-character code representing a
       character of class cntrl 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  iswcntrl()  function  shall  return  non-zero if wc is a control 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() , iswctype() , iswdigit() , iswgraph() , iswlower() , iswprint() ,
       iswpunct()  ,  iswspace()  , iswupper() , iswxdigit() , setlocale() , the Base Definitions
       volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <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 .