Re: [Haskell-cafe] ANN: ieee version 0.7

I'm looking at data-binary-754 right now, and it seems pretty complicated. Why don't they just cast the values bitwise to integers and then serialize those? Forgive my naivete-- I don't know much about binary encoding issues. I went the route of implementing everything in C and then using the FFI. There's a lot of lot of bit-twiddling involved when you work with the guts of IEEE754, which is a lot easier to do in C. See http://github.com/patperry/hs-ieee/blob/master/cbits/feqrel_source.c for a truly ugly example. I ported this code from the Tango math library for D ( http://www.dsource.org/projects/tango/browser/trunk/tango/math/IEEE.d ). It's original author, Don Clugston, claims that the function is about as fast as a ">" comparison. Haskell's great, but I don't think it could get nearly as fast for a function like this. Patrick On Sun, Sep 19, 2010 at 11:16 PM, Conrad Parker wrote:

On 20 September 2010 11:18, Patrick Perry wrote:

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Given that IEEE is actually a standards body and they have many standards, wouldn't it be more appropriate to call this library ieee754?

If it seems important to people, I'd be happy to change the name.  I'm not religious about these things.  Will it clutter up hackage, though?

I reckon it's worth making it obvious that this library does 754 and not, say, 1394 or 802.11 ;-) On the other hand if you intend on expanding the package to implement every IEEE standard ... (j/k)

Anyway, good work. Does this have any overlap with data-binary-ieee754? There was some recent discussion here about the encoding speed in that package.

Conrad.