<wctype.h>(0P)                                      POSIX Programmer's Manual                                     <wctype.h>(0P)



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 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 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 Inter-
       faces volume of IEEE Std 1003.1-2001, iswalnum(), iswalpha(), iswblank(), iswcntrl(), iswctype(), iswdigit(), iswgraph(),
       iswlower(),  iswprint(),  iswpunct(),  iswspace(),  iswupper(), iswxdigit(), setlocale(), towctrans(), towlower(), towup-
       per(), 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, Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                <wctype.h>(0P)