Query: "Data Dictionary" Facilities?

[Dallas Webster]

I hate to jump into the middle of a newsgroup and ask a 
question that has probably been covered before, but ...

I'm looking for a program that extracts "data dictionary"
type of information from C programs, e.g., syntactic things
such as functions, globals, typedefs, macros, call and 
reference graphs.  Although I don't expect it to extract
semantics (although I would not complain if it did), I
would like it to preserve the precious little hints of
high-level semantics that exist in C programs, e.g., comments
and #define's.  I am aware of commercial offerings such as
TekCASE and Re/Source, and of commercial research such as
MicroScope and DynamicDesign.  Is there anything in the 
public domain?  I know only of the C Information Abstractor
at Berkeley, and am trying to contact Chen and Ramamoorthy in
it's regard.  I'd prefer source in C or Common Lisp for the
Sun, but anything that provides access to the data dictionary 
would be okay.

Dallas

P.S.:  Go ahead. Embarrass me by telling me that all I need
is the cdd (or whatever) command that is available in UNIX!
-- 
Dallas Webster
ARPA: webster at MCC.Com
UUCP: {im4u|it-sally}!milano!webster