Thanks Jan and Tomas for the feedback. Answer from Jan is what I am looking for. Maybe I am not looking in the right place buy it is not easy to understand how these LCONS, CONS, SETCDR...etc works.
Thank you Best regards Morgan On Tue, 30 Jun 2020, 12:36 Tomas Kalibera, <tomas.kalib...@gmail.com> wrote: > On 6/30/20 1:06 PM, Jan Gorecki wrote: > > It is quite known that R documentation on R C api could be improved... > > Please see "5.11 Evaluating R expressions from C" from "Writing R > Extensions" > > Best > Tomas > > > Still R-package-devel mailing list should be preferred for this kind > > of questions. > > Not sure if that is the best way, but works. > > > > call_to_sum <- inline::cfunction( > > language = "C", > > sig = c(x = "SEXP"), body = " > > > > SEXP e = PROTECT(lang2(install(\"sum\"), x)); > > SEXP r_true = PROTECT(CONS(ScalarLogical(1), R_NilValue)); > > SETCDR(CDR(e), r_true); > > SET_TAG(CDDR(e), install(\"na.rm\")); > > Rf_PrintValue(e); > > SEXP ans = PROTECT(eval(e, R_GlobalEnv)); > > UNPROTECT(3); > > return ans; > > > > ") > > > > call_to_sum(c(1L,NA,3L)) > > > > On Tue, Jun 30, 2020 at 10:08 AM Morgan Morgan > > <morgan.email...@gmail.com> wrote: > >> Hi All, > >> > >> I was reading the R extension manual section 5.11 ( Evaluating R > expression > >> from C) and I tried to build a simple call to the sum function. Please > see > >> below. > >> > >> call_to_sum <- inline::cfunction( > >> language = "C", > >> sig = c(x = "SEXP"), body = " > >> > >> SEXP e = PROTECT(lang2(install(\"sum\"), x)); > >> SEXP ans = PROTECT(eval(e, R_GlobalEnv)); > >> UNPROTECT(2); > >> return ans; > >> > >> ") > >> > >> call_to_sum(1:3) > >> > >> The above works. My question is how do I add the argument "na.rm=TRUE" > at C > >> level to the above call? I have tried various things based on what is in > >> section 5.11 but I did not manage to get it to work. > >> > >> Thank you > >> Best regards > >> > >> [[alternative HTML version deleted]] > >> > >> ______________________________________________ > >> R-devel@r-project.org mailing list > >> https://stat.ethz.ch/mailman/listinfo/r-devel > > ______________________________________________ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel