/*FUNCTION	<<iswctype>>---extensible wide-character testINDEX	iswctypeANSI_SYNOPSIS	#include <wctype.h>	int iswctype(wint_t <[c]>, wctype_t <[desc]>);TRAD_SYNOPSIS	#include <wctype.h>	int iswctype(<[c]>, <[desc]>)	wint_t <[c]>;	wctype_t <[desc]>;DESCRIPTION<<iswctype>> is a function which classifies wide-character values using thewide-character test specified by <[desc]>.RETURNS<<iswctype>> returns non-zero if and only if <[c]> matches the test specified by <[desc]>.If <[desc]> is unknown, zero is returned.PORTABILITY<<iswctype>> is C99.No supporting OS subroutines are required.*/#include <_ansi.h>#include <wctype.h>#include "local.h"int_DEFUN(iswctype,(c, desc), wint_t c _AND wctype_t desc){  switch (desc)    {    case WC_ALNUM:      return iswalnum (c);    case WC_ALPHA:      return iswalpha (c);    case WC_BLANK:      return iswblank (c);    case WC_CNTRL:      return iswcntrl (c);    case WC_DIGIT:      return iswdigit (c);    case WC_GRAPH:      return iswgraph (c);    case WC_LOWER:      return iswlower (c);    case WC_PRINT:      return iswprint (c);    case WC_PUNCT:      return iswpunct (c);    case WC_SPACE:      return iswspace (c);    case WC_UPPER:      return iswupper (c);    case WC_XDIGIT:      return iswxdigit (c);    default:      return 0; /* eliminate warning */    }  /* otherwise unknown */  return 0;}