Re: [Rd] Is it possible to pass a function argument from R to compiled code in C?

From: Alireza Mahani <alireza.s.mahani_at_gmail.com>
Date: Tue, 20 Sep 2011 11:07:26 -0700 (PDT)

OK, thanks. But there are two issues with using ".Call":

1- I may give up performance if I am literally running R code inside C, right? In some ways, wouldn't it defy the purpose of calling a compiled code if I end up back in R?

2- If I use the ".Call" interface, the resulting code will be tailored to R, i.e. I will end up having the lengthy code with all the R macros in it. I always prefer to use ".C" interface because I can use the exact same piece of code inside of a C program, i.e. I can call the same function either from R or from C. But with .Call, I am passing R's pointers into the function, which obviously I won't be doing when my call comes from inside of C.

Nevertheless, it's good to know that there is at least a sub-optimal solution out there (sub-optimal from my perspective, of course!).

-Alireza

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