Subj : Re: Passing Variables from a function to Javscript
To   : netscape.public.mozilla.jseng
From : "Alan Kemp" <alan@alankemp.com>
Date : Tue Mar 09 2004 02:51 pm


"Zaph" <meisterderdinge@gmx.net> wrote in message
news:c982fb96.0403090514.32025d84@posting.google.com...
> Hi,
>
> I have a C-Function that I call from Javascript with some variables.
> At the End of the Function I want to pass the result back to
> javascript.
>
> How do I do that ?
>
> Can anybody please help me with this ?


JSBool AddThem(JSContext * context, JSObject * globalObject, unsigned int
argc, jsval *argv, jsval *rval)
{
    // error checking ommited

    int a = JSVAL_TO_INT(argv[0]);
    int b = JSVAL_TO_INT(argv[1]);

    *rval = INT_TO_JSVAL(a + b);

    return JS_TRUE;
}

The last parameter of your native code function is the value to be returned
to the javascript caller.  So just dereference the pointer you are passed,
and assign it the return value (as a jsval of course).

Alan

.