[plt-scheme] parsing/prettyprinting C

Hello list,

Does anyone here have a recommendation for a parser/prettyprinter
for reading/writing C code that can be integrated with PLT Scheme?  

Something in the style of these:

http://docs.camlcity.org/docs/godipkg/3.10//godi-frontc
http://www.sivity.net/projects/language.c

Cheers,
Tom