Richard Cotton wrote: > > Prof Brian Ripley wrote: > >>> Yes. The problem is of course that we do want a sprintf() format there >>> for "Rplot%03d.pdf" et al. One option would be to escape "%" except >>> when in (regexp) "%[0-9]*d", which seems nontrivial, but not impossible. >>> >> But there are other integer formats (%i, %u, %x, %X), and other flags (# >> might be useful). So the list of valid inputs is also rather long. It >> would be tedious to do at C level, but a check in the R-level wrapper >> would be easier (if not 'simple'). >> >> > > Having just worked my way through the alphabet, I can say that it is only > the letters 's' and 'n' that cause any problems. Thus, if you do decide to > handle the error in the R wrapper functions, the regex for bad inputs is > fairly straightforward "%[#[:blank:]\\+\\-]*[[:digit:]]*[sn]". > Not quite. The floating point formats are also problematic; you may fetch 8 bytes where only 4 was allocated. Also, %%s should not be forbidden. Anyways, I believe Brian has this in hand.
-- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
