Subj : Re: how to implement a function with JSString return value and
To   : netscape.public.mozilla.jseng
From : Matthew Mondor
Date : Mon May 16 2005 11:12 am

On Mon, 16 May 2005 15:59:31 +0800
twmt <hitwmt@gmail.com> wrote:

> hello, everyone.
> 
> I am using spidermonkey, and want to implenment such a javascript:
> ......
> <script>
> var rec;
> rec = foo();
> </script>
> .. ...
> foo() is the native C function called from javscript. 
> 
> I want foo() return a string, so I define 
> JSString *foo(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
> jsval *rval). and JS_DefineFunction(context, global, "foo", foo, 1,
> 0);

The return value of your C native function should be set using the jsval
*rval pointer.  A good example source is in the spidermonkey code
itself, the way standard classes are implemented...  For instance, if
you already created a JSString, you can use:

*rval = STRING_TO_JSVAL(string);

where string consists of your JSString *.  You are right that all
prototypes should use a JSBool return type.

Matt

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