ISWALNUM(P)                                                                           ISWALNUM(P)



NAME
       iswalnum - test for an alphanumeric wide-character code

SYNOPSIS
       #include <wctype.h>

       int iswalnum(wint_t wc);


DESCRIPTION
       The  iswalnum()  function  shall  test  whether wc is a wide-character code representing a
       character of class alpha or digit in the program's current locale; see  the  Base  Defini-
       tions volume of IEEE Std 1003.1-2001, Chapter 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  iswalnum()  function  shall  return  non-zero if wc is an alphanumeric 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 languages, only  this  func-
       tion  and  those listed in the SEE ALSO section should be used for classification of wide-
       character codes.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       iswalpha() , iswcntrl() , iswctype() , iswdigit() , iswgraph() , iswlower() , iswprint() ,
       iswpunct()  ,  iswspace()  , iswupper() , iswxdigit() , setlocale() , the Base Definitions
       volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <stdio.h>, <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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .



POSIX                                          2003                                   ISWALNUM(P)