So upshot is that I can only do why I want by using the function that's not part of the api, or just not using connections at all and just using normal C file io, opened from C, and simply pass the file name in instead, rather than a proper connection object?
> On 21 Jan 2016, at 6:04 pm, Duncan Murdoch <murdoch.dun...@gmail.com> wrote: > >> On 21/01/2016 12:50 PM, Tom Quarendon wrote: >> But that's what I want to do, create the connection in R code and pass it on >> to the C function. >> My question is, how do I do that? >> You appear to need the C getConnection entry point, but it's not part of the >> API. >> So I'm wondering how I'm supposed to do what you describe. > > Sorry, my advice was wrong. I remembered that we exposed code to create new > connections, and assumed it had some code to work with them, but it doesn't. > > Duncan Murdoch >> >> Sorry if I was unclear. >> >> Sent from my iPhone >> >> >> On 21 Jan 2016, at 5:44 pm, Duncan Murdoch <murdoch.dun...@gmail.com> >> >> wrote: >> >> >> >> On 21/01/2016 11:39 AM, Tom Quarendon wrote: >> >> I would like to implement a package that contains a C function that >> >> writes to a connection. >> >> So the R_ext/Connections.h defines what a connection IS, but not how to >> >> get one. >> >> >> >> What seems to work is to manually declare >> >> Rconnection getConnection(int n); >> >> In my C file, and while this works, and I can then use the connection >> >> object, it fails package validation with: >> >> >> >> �Found non-API call to R: �getConnection� >> >> Compiled code should not call non-API entry points in R.� >> >> >> >> So how am I supposed to do this? Is there a way? Or do I just live with >> >> the check warning (ideally not)? >> > >> > The usual way to do that would be to create the connection in R code, and >> > pass it in with your call. >> > >> > If you don't know what connection you need at the time you call your C >> > code, you can evaluate an R expression from C to do the same, but this is >> > relatively tricky, so I'd advise the other method. >> > >> > Duncan Murdoch > ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
