The second data structure is an array of structure .. the third set of structure are a series of "bit" lists ... Each array element has an offset for its corresponding "bit list": [{........, offset: Int64}] [[bit]] when I marshall up all this "offset" should be the serialized/"marshalled" offset of its correponding [bit]!! Regards, Vasili On Thu, Jan 1, 2009 at 10:51 PM, Antoine Latter wrote:

2009/1/1 Galchin, Vasili :

...

Say I have several data structures that are marshalled(using Binary class) and written out linearly on persistence store. I want to calculate the offsets in bytes of these various data structures in a functional language way. What is the "suggested" (elegant) way .... ?

It doesn't look like the 'Put' monad in te binary package keeps track of position in the output stream.

Is there a bigger-picture goal you're trying to achieve? Maybe we could suggest a better approach by stepping back a bit.

-Antoine