Subj : Re: Executing a line of C code in javascript
To   : netscape.public.mozilla.jseng
From : David Bradley <DavidBradleyNOSPAM@cinci.rr.com>
Date : Sun Aug 24 2003 11:21 pm

Brendan Eich wrote:
> David Bradley wrote:
> Why not?  Or, how not?  I mean, tell me more.  It's possible to hook up 
> arbitrary code, provided you know the C or C++ signature of the function 
> to call.  XPConnect and COMConnect prove that.

Right, but you need IDL or a typelib and he seemed to be talking C and 
not c++. I also may read in too much into the message, due to the 
responses he received from the comp.lang.javascript group and thought he 
didn't have control over the C code in question. And I was thinking 
along the lines of what Visual BASIC provides, in allowing a declaration 
that imports a native function and allows it to be called like a VB one.

JS_DefineFunction will allow you to invoke a C function with the 
signature defined by the JS callback typedef. But I couldn't use that to 
call say the Sleep Win32 API function unless I created a small wrapper 
that would translate the jsval arguments to the integer needed by sleep.

David Bradley

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