A source to source Instrumenter

[Sanjay Sharma]

I am looking for a tool which wiil take a fortran application written  	in
fortran 77 and  will annotate the code marking all loops, conditional 
statements and  function/subroutine entry/exit statements preserving the
user comments as well. I would like to do the same for a 'C' application.
The platform will be a machine running UNIX OS. I think the tool would be based
on "lex and/or  yacc".

	Do any of you know about such a tool/tools in public domain, or if 
you folks can suggest some pointers.

Any help would be greatly appreciated.

--sanajy sharma