[R] Using as.integer(NA) in the .C function

[cgenolin]

Hi the list,
I am including some C code in a R program using the .C interface. I want to
deal with NA values, but the result is strange:

--- 8< ------------ C code -----------
void hein(int *a, int *b, int* c){
  *c = (*a + *b);
}
--- 8< -----------------------------------
--- 8< ------------- R code -----------
> .C("hein",as.integer(NA),as.integer(1),as.integer(1),NAOK=TRUE)[[3]]
[1] -2147483647
--- 8< ---------------------------------
The result should be NA, isn't it? What wrong il my code?

Christophe



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