0p:wctype.h

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      wctype.h - wide-character classification and mapping utilities
      
      #include <wctype.h>

Contents 1 DESCRIPTION 2 APPLICATION USAGE 3 RATIONALE 4 FUTURE DIRECTIONS 5 RELATED 6 COPYRIGHT 7 CATEGORY

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 pro-
      vided.
 
             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>, <std-
      def.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.

RELATED

      <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(), iswprint(), 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, Stan-
      dard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base  Specifica-
      tions 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 <wctype.h>(P)

CATEGORY