Yup I'm aware of it, and I'd love to use it. The only problem is that it's
highly linux/unix specific as far as I can tell. Even the graphics
libraries it uses only runs on 'nix right now. I just tried to load
graphics.hgl and hello world program crashed GHCi and doesn't compile under
the regul
Matthew, the entire Haskell.org website is a Wiki. You might spare
someone else the pain that you went through by starting a "Duffers guide
to the Haskell FFI" that contains the information you wished you'd known
on day 1. I'm sure you'd get lots of help on the #haskell IRC if you
did so.
The
On Mon, 15 May 2006, Simon Peyton-Jones wrote:
> | > the automated ones, seemed to handle the case of passing numerical
> | > arrays to C, and having them get updated and passed back. That is
> my
> | > primary interest in the FFI and yet no obvious solution or example
> | > could be found after d
Hello Donald,
Saturday, May 13, 2006, 11:47:34 AM, you wrote:
> * Visit haskell.org
> * Click on "Books and tutorials"
> * Scroll to "Using Monads"
> * First entry in the list is this paper.
but novices don't know what monads is a Haskell way to do I/O and
interface with C!
>> It was ce
On Sat, 13 May 2006, Matthew Bromberg wrote:
> So after about 10 hours of wrestling with syntax, including messing up
> the initial capitalization of module names, indenting in do lists,
> forgetting to put commas in tuples and lists I finally got the following
> example to compile without error
| > the automated ones, seemed to handle the case of passing numerical
| > arrays to C, and having them get updated and passed back. That is
my
| > primary interest in the FFI and yet no obvious solution or example
| > could be found after days of internet searching and pouring over
| > tutorials
Brian Hulley wrote:
withStorableArray arr $ sumarr >>= print
Ooops!
(withStorableArray arr sumarr) >>= print
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Matthew Bromberg wrote:
foreign import ccall "matrix_c.h sumarr" sumarr :: Ptr CDouble ->
CDouble [snip]
If one changes the array in[] in the C code, e.g.
double sumarr(double *in)
{
in[0] = -10.0 ;
return(in[0] + in[1]) ;
}
The array is changed inside the haskell program as a side effect.
mai
mattcbro:
> I am a newcomer to Haskell and I'm offering my perspective on the troubles I
> endured trying to make Haskell interface to some simple C programs.
> It is my hope, that by documenting this, someone else will benefit from my
> mistakes and errors and climb the learning curve somewhat fas
I am a newcomer to Haskell and I'm offering my perspective on the troubles I
endured trying to make Haskell interface to some simple C programs.
It is my hope, that by documenting this, someone else will benefit from my
mistakes and errors and climb the learning curve somewhat faster than me.
I w
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