Subj : Re: Executing a line of C code in javascript
To   : netscape.public.mozilla.jseng
From : David Bradley <DavidBradleyNOSPAM@cinci.rr.com>
Date : Thu Aug 21 2003 05:46 pm

Heath Raftery wrote:
> I noticed that previously in comp.lang.javascript, people have claimed 
> that C++/C functions are tricky to execute in javascript, possibly 
> requiring ActiveX interfaces or JNI work. However, Mozilla seems to do 
> it fine.

Sounds like they're talking about Java not JavaScript

> So, how would I achieve this without including most of mozilla in my 
> application? Is there a simpler way of achieving the same? I just want 
> to resolve a host name! Or even simpler - I just want to parse a PAC 
> file!

Do you have control over the code you're embedding SpiderMonkey in? What 
you need to do is to use JS_DefineFunction to link the C function to an 
object, possibly the global object. js.c has an example of what I'm 
talking about http://lxr.mozilla.org/seamonkey/source/js/src/js.c#2218. 
That defines multiple functions, JS_DefineFunction can be used to define 
a single function.

I don't believe there's anything that would allow you to dynamically 
specify a native function at runtime.

David Bradley

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