A true challenge for Emac and Elisp hackers - at Least I think so

[Sune]

Hi all!

After having had dozens of null pointer exceptions thrown at me, I
decided to give up on the much hyped Eclipse CDT 3.0 and switch to
Emacs. Emacs seems to be configurable down to its atoms and I don't
have to wait for the screen to update while I type (which is eh...
nice). Basically, Emacs makes me more productive.

After starting to write some C-programs I quickly realized what I
wanted Emacs to do for me and added Elisp code into .emacs until I was
closed to being satisfied.

This is how far I've come:

Editor
- GNU coding guidelines enforced
- keyboard shortcuts to almost anything including features listed below
- nice functions like untabify-and-reindent, kill buffer of choice,
keyboard macros
etc etc

CVS
- Integrated in menu system to a satisfactory level + keyboard
shortcuts

Make
- Completely intergrated in menu system + keyboard shortcuts +
integrated with error look up in files
etc etc

But now the shit hits the fan! I want the following, but I have no clue
as to how I should even start:

The whole idea is this: I want to add debug trace with as little effort
as possible into my source.

1)
What is listed below is valid for all .c files. Not .h files!
2)
I want RET, the enter key, to trig the following behaviour:

   * If I hit RET with any shift-key being pressed
     simultaneously, RET must behave as any
     normal RET would (basically a normal
     linefeed with possible auto-indentation).
     This may seem backward but I want almost
     every line in my sorce to be traceable.

   * If I hit RET only, and the following applies:

       - It is preceeded by a ';' (semicolon) AND the
         word 'return' is not part of the current
         line or:

       - It is preceeded by a '{' (curly bracket)

     RET adds DBG after the ';' or the '{' with a
     space in between like so:

     ; DBG
     { DBG

     respectively. After that (the same key stroke)
     , RET behaves like a normal RET would (basically
     a normal linefeed with possible auto-indentation).

I have to admit that this is so far out there (at least for me) that I
would need more or less a ready-to-go implementation just to paste into
.emacs.

Do you know a place where something similar has been done which I can
steal and adapt, or are you interested in implementing it? (A place on
my tomb stone is reserved for anyone that succeeds in doing this)

Otherwise I will go back to crap Eclipse, wait for it to stabilize and
implement a plugin - that stuff I know. I just don't want to give up on
Emacs!!

Truckloads of thanks
/Sune