Hi Thorsten,
> (de evalInR ("Cmd")
> (native `*RinC "evalInR" 'P "Cmd"))
>
> ## SEXP evalInR(char * cmd);
>
> rinc: (evalInR "print(6*4)")
> [1] 24
> -> 65814160
OK, so now we have a pointer to a structure filled by evalInR().
> rinc: (evalInR "6*4")
> -> 65814160
>
> how can I extract the result from that Pointer in PicoLisp (lack of C
> skills ... ;-)?
You can use the 'struct' function to access it.
I could not find the exact definition of SEXP. but as it is a pointer to a
structure, you can do
(struct (evalInR "6*4") ...)
The arguments depend on the exact layout of the data in the C struct. I think
this helps: https://software-lab.de/doc/native.html
☺/ A!ex
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