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Today's Topics:
1. ffi array and peekArray (PICCA Frederic-Emmanuel)
2. (no subject) (Olivier TOURNAIRE)
3. Re: (no subject) (Imants Cekusins)
----------------------------------------------------------------------
Message: 1
Date: Sun, 8 Nov 2015 09:55:30 +0000
From: PICCA Frederic-Emmanuel
<frederic-emmanuel.pi...@synchrotron-soleil.fr>
To: "beginners@haskell.org" <beginners@haskell.org>
Subject: [Haskell-beginners] ffi array and peekArray
Message-ID:
<a2a20ec3b8560d408356cac2fc148e53b2fad...@sun-dag3.synchrotron-soleil.fr>
Content-Type: text/plain; charset="us-ascii"
Hello,
Here the signature of one of my C function
-- hkl.h --
typedef struct _HklFactory HklFactory;
HKLAPI HklFactory **hkl_factory_get_all(size_t *n) HKL_ARG_NONNULL(1);
HKLAPI HklFactory *hkl_factory_get_by_name(const char *name,
GError **error) HKL_ARG_NONNULL(1)
HKL_WARN_UNUSED_RESULT;
HKLAPI const char *hkl_factory_name_get(const HklFactory *self)
HKL_ARG_NONNULL(1);
HKLAPI HklGeometry *hkl_factory_create_new_geometry(const HklFactory *self)
HKL_ARG_NONNULL(1);
HKLAPI HklEngineList *hkl_factory_create_new_engine_list(const HklFactory
*self) HKL_ARG_NONNULL(1);
I will focuss for now only the get_all method. As you can see even for the C
client of my API HklFactory is an opac struct
This get_all method return an array of (HklFactory *) and get the size of the
array via the n parameter.
So I am trying to use this API from haskell with the foreign system and return
a [HklFactory]
import Foreign (Ptr, peek)
import Foreign.Marshal.Alloc (alloca)
import Foreign.Marshal.Array (peekArray)
data HklFactory
foreign import ccall safe "hkl.h hkl_factory_get_all"
c_hkl_factory_get_all :: Ptr Int -> IO (Ptr HklFactory)
hklFactoryGetAll :: IO [HklFactory]
hklFactoryGetAll = alloca $ \n -> do
factories <- c_hkl_factory_get_all n
peekArray n factories
but indeed it doesn not work, peekArray complain that n is Ptr Int instead of
Int.
what should I do in order to get my array of HklFactory
thanks for your help.
Frederic
------------------------------
Message: 2
Date: Sun, 8 Nov 2015 10:56:38 +0100 (CET)
From: Olivier TOURNAIRE <olivier.tourna...@wanadoo.fr>
To: beginners@haskell.org
Subject: [Haskell-beginners] (no subject)
Message-ID: <860188405.2807.1446976598088.JavaMail.www@wwinf1j16>
Content-Type: text/plain; charset=UTF-8
Hello
I would like to implement Haskell with a samsung tablet SM T800.
How can i do that ?
Thank you very much.
------------------------------
Message: 3
Date: Sun, 8 Nov 2015 11:17:27 +0100
From: Imants Cekusins <ima...@gmail.com>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <beginners@haskell.org>,
Olivier TOURNAIRE <olivier.tourna...@wanadoo.fr>
Subject: Re: [Haskell-beginners] (no subject)
Message-ID:
<CAP1qinZsAzinMHgmDYPRLy1gutEQkSczHX9NefzQhOEMiJ4h=q...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
> Haskell with a samsung tablet SM T800.
The short answer: this is not easy.
Here is some detail:
https://wiki.haskell.org/Android
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