Re: Calling C code from R...wrapping C structures

> Hi everyone,
>
> I am currently trying to call some C code from R, specifically calling a
> function which populates a C struct.
>
> typedef struct{
>    // contents
> } Model;
>
> void test(Model *m){
>    // fill the struct with crap
> }
>
> I compile the C code into a shared library, which loads into R properly. My
> simple test functions work (i.e adding numbers etc)
> setModel <- function(){
>    model<-vector("list", 6)
>    name(model) <- c( SET THE NAMES OF THE MODEL HERE )
>    model
> }
> t <- setModel()
> testcode <- function(setModel){
>
>
> dyn.load("Simulation.so")
>
> foo <- .C("test", Model=setModel)
> foo
> }
>
> testcode(t)
>
> However I get segfaults whenever I try to access any of the variables
> contained in Model. So my question is: am I doing something wrong here? Is
> list the right data type to wrap a structure in? I cant see any
> documentation about wrapping structs in R.
>
> Also when I pass strings to C from R they dont seem to be passed at all? Is
> this a problem with R or a problem with me and if so how do I fix it?

>
> Many Thanks in advance,
>
> Nathan
>
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>
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