These functions are handy for writing Sweave drivers and are considered internal and hence not documented. Look at the source code of the Sweave Latex driver (in this package) or the HTML driver (in the R2HTML package from CRAN) to see how they can be used.
RtangleWritedoc(object, chunk)
RweaveChunkPrefix(options)
RweaveEvalWithOpt(expr, options)
RweaveLatexFinish(object, error = FALSE)
RweaveLatexOptions(options)
RweaveTryStop(err, options)
SweaveHooks(options, run = FALSE, envir = .GlobalEnv)
makeRweaveLatexCodeRunner(evalFunc = RweaveEvalWithOpt)The Sweave, RweaveLatex help pages.