FFI Tutorial / Examples
Matthew Donadio
m.p.donadio@ieee.org
Sun, 09 Mar 2003 22:13:35 -0500
Hi all,
I may be being a bit dense about this, but I am having some trouble
understanding how to use FFI, especially with respect to interfacing
Haskell lists/arrays to C arrays.
For example, say I have the C functions
void foo (double *input, double *output, int N);
double bar (double *input, int N);
and I want to create an FFI interface and have the resulting type
signatures be
> foo :: Array Int Double -> Array Int Double
> bar :: Array Int Double -> Double
where the bounds of the arrays are (0,N-1), and both foo and bar are
pure. I read through the FFI docs, but I am still confused about how to
do this. Can anyone point me to an FFI tutorial, or some examples? I
have a feeling that once I see some examples using lists and arrays that
things will fall into place.
Thanks.
--
Matthew Donadio (m.p.donadio@ieee.org)