[Haskell-cafe] GHC.Ptr, Foreign.Storable, Data.Storable.Endian, looking for good examples of usage

[Aaron Gray]

On 10 January 2011 13:49, John Lato <jwlato at gmail.com> wrote:

> From: Aaron Gray <aaronngray.lists at gmail.com>
>>
>> On 9 January 2011 21:30, Henning Thielemann
>> <lemming at 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.
>>
>
> You could use my "word24" package[1] (GHC only) to provide non-aligned
> 24-bit word and int types with Storable instances.  You should be able to
> write a binary instance (or whatever blaze-builder needs) fairly simply from
> this.  Little-endian only ATM, but BE could be added if necessary.
>
> John Lato
> [1] http://hackage.haskell.org/package/word24
>

This is interesting, what does the following line do :-

    data Int24 = I24# Int# deriving (Eq, Ord)

regarding the I24# and Int#, are these inbuilt ?

Thanks,

Aaron
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