Thanks, this helps a lot.
So if I understand correctly:
in package P1, I want to export printMatrix and printMatrixInt. In my
file P1.c, I have to add
void R_init_P1(DllInfo *info){
R_registerCCallable("longitudinalData","printMatrix",printMatrix);
R_registerCCallable("longitudinalData","printMatrixInt",printMatrixInt);
};
In P2.c, I have to add :
void R_init_P2(DllInfo *info){
printMatrix = R_GetCCallable("longitudinalData","printMatrix");
printMatrixInt = R_GetCCallable("longitudinalData","printMatrixInt");
};
I still have a problem here: "Writing R ext" say that 'printMatrix' and
'printMatrixInt' should have "an appropriate declaration". What is the
appropriate declaration?
Christophe
Hello,
This was discussed this week in the thread "LinkingTo and C++".
It is possible, and documented in WRE section 5.4 :
http://cran.r-project.org/doc/manuals/R-exts.html#Registering-native-routines
Romain
On 02/14/2010 12:58 PM, Christophe Genolini wrote:
Hi the list,
In a package P1, I write a function f1 in C, potentially an internal
function (not to be called from R).
In a package P2, I write a function f2 in C. The f2 function needs to
use f1 from P1. Is it possible ?
--- 8< ---- In file P1.c ---------
double f1(x,y){
....
}
--- 8< ---- In file P2.c ---------
void f2(x,y,z){
double result;
....
result = f1(x,y);
....
}
Thanks
Christophe
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