Here is a list of all documented files with brief descriptions:

base64.c
buf.c
buf.h
checksum.c
checksum.h
command.c
command.h
config.h
delta.c
emit.c
emit.h
fileutil.c
hashtable.c
hashtable.h
hex.c
isprefix.c
isprefix.h
job.c
job.h
librsync.h
librsync_export.h
mdfour.c
mdfour.h
mksum.c
msg.c
netint.c
netint.h
patch.c
prototab.c
prototab.h
rabinkarp.c
rabinkarp.h
rdiff.c
readsums.c
rollsum.c
rollsum.h
scoop.c
stats.c
stream.h
sumset.c
sumset.h
trace.c
trace.h
tube.c
util.c
util.h
version.c
whole.c
whole.h