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

On 10 January 2011 13:49, John Lato wrote:

From: Aaron Gray

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On 9 January 2011 21:30, Henning Thielemann wrote:

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On Sun, 9 Jan 2011, Aaron Gray wrote:

I am trying to work out how to use GHC.Ptr, Foreign.Storable,

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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