On 10 January 2011 01:08, Antoine Latter <aslatter@gmail.com> wrote:

On Sun, Jan 9, 2011 at 6:05 PM, Aaron Gray <aaronngray.lists@gmail.com> wrote:
> On 9 January 2011 21:30, Henning Thielemann <lemming@henning-thielemann.de>
> wrote:
>>
>> On Sun, 9 Jan 2011, Aaron Gray wrote:
>>
>>> I am trying to work out how to use GHC.Ptr, Foreign.Storable,
>>> Data.Storable.Endian, and
>>> am looking for good examples of usage.
>>
>> What do you intend to do with them?
>>
>
> An (ABC) ActionScript Byte Code backend for Haskell.
> Basically I need to write little-endian binary to a file, and was wondering
> the best way to do this; I need various types including a 24bit type.
>

Ah, I would recommend the 'binary' package on hackage, specifically
the module Data.Binary.Builder. Another recently popular alternative
is the 'blaze-builder' package.

It does say that it is designed to work with bigendian data, but there are some little-endian primatives in Data.Binary.Get/Put

Although the 24-bit access might be difficult - how are they aligned?

They are non aligned, they are actually used as jump offsets in the byte code.

I guess with either of these you'd have to peek a Word8 and then a
Word16 and then munge them together, depending.

Three put/getWord8's would probably be neater.

http://hackage.haskell.org/package/binary
http://hackage.haskell.org/package/blaze-builder

Blaze looks a bit more specialized.

Many thanks,

Aaron