wctype.h

<wctype.h>(P)							<wctype.h>(P)



NAME
       wctype.h - wide-character classification and mapping utilities

SYNOPSIS
       #include <wctype.h>

DESCRIPTION
       Some of the functionality described on this reference page extends the
       ISO C standard. Applications shall define the appropriate feature test
       macro  (see the System Interfaces volume of IEEE Std 1003.1-2001, Sec-
       tion 2.2, The Compilation Environment) to  enable  the  visibility  of
       these symbols in this header.

       The <wctype.h> header shall define the following types:

       wint_t As described in <wchar.h> .

       wctrans_t
	      A	 scalar type that can hold values which represent locale-spe-
	      cific character mappings.

       wctype_t
	      As described in <wchar.h> .


       The following shall be declared as functions and may also  be  defined
       as macros. Function prototypes shall be provided.


	      int	iswalnum(wint_t);
	      int	iswalpha(wint_t);
	      int	iswblank(wint_t);
	      int	iswcntrl(wint_t);
	      int	iswdigit(wint_t);
	      int	iswgraph(wint_t);
	      int	iswlower(wint_t);
	      int	iswprint(wint_t);
	      int	iswpunct(wint_t);
	      int	iswspace(wint_t);
	      int	iswupper(wint_t);
	      int	iswxdigit(wint_t);
	      int	iswctype(wint_t, wctype_t);
	      wint_t	towctrans(wint_t, wctrans_t);
	      wint_t	towlower(wint_t);
	      wint_t	towupper(wint_t);
	      wctrans_t wctrans(const char *);
	      wctype_t	wctype(const char *);

       The <wctype.h> header shall define the following macro name:

       WEOF   Constant	expression of type wint_t that is returned by several
	      MSE functions to indicate end-of-file.


       For all functions described in this header that accept an argument  of
       type  wint_t,  the  value  is representable as a wchar_t or equals the
       value of WEOF. If this argument has any other value, the	 behavior  is
       undefined.

       The behavior of these functions shall be affected by the LC_CTYPE cat-
       egory of the current locale.

       Inclusion of the <wctype.h> header may make visible all	symbols	 from
       the  headers <ctype.h>, <stdarg.h>, <stddef.h>, <stdio.h>, <stdlib.h>,
       <string.h>, <time.h>, and <wchar.h>.

       The following sections are informative.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       <ctype.h> ,  <locale.h>	,  <stdarg.h>  ,  <stddef.h>  ,	 <stdio.h>  ,
       <stdlib.h> , <string.h> , <time.h> , <wchar.h> , the System Interfaces
       volume of IEEE Std 1003.1-2001,	iswalnum(),  iswalpha(),  iswblank(),
       iswcntrl(),   iswctype(),  iswdigit(),  iswgraph(),  iswlower(),	 isw-
       print(), iswpunct(), iswspace(), iswupper(), iswxdigit(), setlocale(),
       towctrans(), towlower(), towupper(), wctrans(), wctype()

COPYRIGHT
       Portions	 of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information  Technol-
       ogy  --	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 .



POSIX				     2003			<wctype.h>(P)