iswctype(3C)                                            iswctype(3C)


       NAME
             iswctype, wctype - test wide characters for a particular
             class.

       SYNOPSIS
             #include <wchar.h>
             int iswctype(wint_t wc, wctype_t prop);
             wctype_t wctype(const char *charclass);

       DESCRIPTION
             iswctype checks whether the wide character wc is of the wide
             character class prop, the value of which is returned by a
             previous successful call to wctype.  iswctype returns zero for
             false and non-zero for true.  The function is defined on WEOF
             and wide characters that correspond to valid wide character
             encodings in the current locale.  A change to the LC_CTYPE
             category of the current locale invalidates an existing prop.

             wctype is defined for valid wide character class names that
             have a definition in the current locale.  charclass is a
             string that identifies a generic wide character class.  For
             this, codeset-specific information is needed.  The wide
             character class names that are supported in all locales are
             listed below.

          Return Values
             iswctype returns zero for false and nonzero for true.  wctype
             returns a value that is of the type wctype_t.  This value can
             then be used as a second argument to subsequent calls to
             iswctype.  If charclass is not supported, wctype returns zero.

       USAGE
             The following twelve strings are reserved for the standard
             character classes: "alnum", "alpha", "blank", "cntrl",
             "digit", "graph", "lower", "print", "punct", "space", "upper"
             and "xdigit".

             The functions found on the left are equivalent to the iswctype
             calls on the right.
                   iswalpha(wc)   iswctype(wc, wctype("alpha"))
                   iswupper(wc)   iswctype(wc, wctype("upper"))
                   iswlower(wc)   iswctype(wc, wctype("lower"))
                   iswdigit(wc)   iswctype(wc, wctype("digit"))
                   iswxdigit(wc)  iswctype(wc, wctype("xdigit"))
                   iswalnum(wc)   iswctype(wc, wctype("alnum"))
                   iswspace(wc)   iswctype(wc, wctype("space"))


                           Copyright 1994 Novell, Inc.               Page 1

      iswctype(3C)                                            iswctype(3C)


                  iswpunct(wc)   iswctype(wc, wctype("punct"))
                  iswprint(wc)   iswctype(wc, wctype("print"))
                  iswgraph(wc)   iswctype(wc, wctype("graph"))
                  iswcntrl(wc)   iswctype(wc, wctype("cntrl"))

            There is no isw* function equivalent to the call:
                  iswctype(wc, wctype("blank"))

      REFERENCES
            wctype(3C)






































                          Copyright 1994 Novell, Inc.               Page 2