[Haskell-cafe] Data.Vector with stride

Mike Ledger mike at quasimal.com
Mon Dec 16 02:42:15 UTC 2013

A quick and dirty way do have strides with Data.Vector.Storable might 
be to use a newtype around a type, and have its sizeOf be the stride.

On Monday, December 16, 2013 1:13:50 PM, Niklas Hambüchen wrote:
> For low-level performance, especially when dealing with images, pixel
> buffers, camera devices etc, arrays can have a "stride" to align rows to
> word boundaries.
> http://en.wikipedia.org/wiki/Stride_of_an_array
> Data.Vector does not support strides (as mentioned in
> http://u.arboreus.com/2011/03/how-to-choose-haskell-array-library.html),
> but it would be nice to have them, especially for Storable vectors and
> interfacing with C imaging libraries.
> Is there a particular reason / difficulty that would go against an
> implementation of a Data.Vector.Storable.Stride and the corresponding
> generic vector instances?
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