Code re-use metrics

I didn't think that it would be this hard but I'm looking for a tool that can give me the following code re-use metrics:

* physical count w/o including blank and comment lines and no logical code counting
* added/new lines
* modified lines
* existing lines
* support C/C++/C# languages

We are starting with a branch from Main and would like to track these numbers over time as the new software version matures. For starters I've been using CLOC (http://cloc.sourceforge.net/) and love the scripting ability andgenerated output. I hope to find something similar for code re-use metrics..

Thanks,
Jonny P.