iswcntrl man page on CentOS

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ISWCNTRL(P)		   POSIX Programmer's Manual		   ISWCNTRL(P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

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,	 Chap‐
       ter 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 lan‐
       guages, 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 .

IEEE/The Open Group		     2003			   ISWCNTRL(P)
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