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Linux 2.6 - man page for wctype.h (linux section 7posix)

<wctype.h>(P)			    POSIX Programmer's Manual			    <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,  Section 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-specific  character  map-
	      pings.

       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 category 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 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				    <wctype.h>(P)


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