[Haskell-cafe] ANNOUNCE: hs-cryptohash 0.4
tab at snarc.org
Sat Jul 3 03:08:40 EDT 2010
On 02/07/10 22:41, Gregory Crosswhite wrote:
> On 7/2/10 5:16 AM, Vincent Hanquez wrote:
>> It's necessary in my case since i receive chunks of data to be hashed
>> from the
>> network, and I don't want to carry a buffer of data (with potential
>> issues), until i can hash everything.
> As an aside, this kind of pattern where you are processing chunks of
> input and producing a summary output sounds like a good fit for the
> Iteratees style of I/O.
Indeed. I haven't played with iteratee yet, but it seems fairly easy for
the user to add a iteratee interface on top of update and finalize.
basically it seems that Chunk = update and EOF = finalize.
> Also, if you want the intermediate chunks to go away, then don't
> forget to use strict evaluation when you update the context. :-)
> That is unfortunately one of the kinds of bugs that doesn't screw up
> the behaviour of the program in a way that is immediately obvious.
yes, you're absolutely right. I did actually forget in an early version
of some code i've got on top of cryptohash, and it took me a good while
to find ;)
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