All packaged in C++ form. Well, not the keywords.txt file. I'm not sure what that is, though I guess it has something to do with the color coding of the build in editor.
http://www.federated.com/~jim/onewire/ contains the library and a sample program. Feel free to vacuum it up into anything you like.
This library is general 1-wire. It might be nice to derive a DS18S20 class from this that knows about temperature to handle the conversions, or that might start making too much object code. Maybe I'm being too sensitive to code bloat, but it seems that higher level libraries will end up containing a lot of unused functions for any given application. e.g. I won't use the alarm threshold registers in my application but I'd end up with functions for them linked into my code. I had enough worry about that in just the generic functions that I ended up with a couple nasty preprocessor symbols to omit some of the larger functions that people might not need.