HacPDX/Projects: Difference between revisions

Revision as of 18:12, 26 September 2009

Projects you intend to tackle.

Project	Task Description	Participants
Network APIs	Investigate and test new APIs for potentially replacing network, network-bytestring, and network-fancy	TomMD
HPDF	Additional hacking and c bindings	jmelesky
HUnit	GUI. Maybe also text UI that isn't horrible	KimWallmark
judy	Fast, mutable collection types	dons

Projects you'd consider, but depends on the interest of other attendees.

Project	Task Description
Crypto Part I	Fix up the crypto library - use bytestring, fold in pureMD5/SHA/hecc, provide a new API
PNG	Work on Bart Massey's pure-Haskell PNG reading/writing library. Lots to do here.
ParseArgs	Clean up and extend a bit Bart Massey's parseargs package.
TCP Service	Extract and package the SMTP-style TCP server bits from Bart Massey's MiniChess server.
sqlite open_v2()	Add full support for SQlite's open_v2() call to the sqlite package.
HaRe	Get it compiling under ghc 6.10; cabalize it.
plugins	Tests and examples seem to fail with linking errors on the latest Haskell Platform.
wxHaskell	Get this to install on Arch Linux.
Kernel Modules	Finish porting a Linux driver to Haskell (mostly means working on the c2hs bindings)
Whiteout	I - Echo Nolan - have been working on a BitTorrent client library. It uses fun things like iteratees and STM. If anyone is interested in hearing about/working on it, I'm more than happy to give the guided tour.
Lambdabot	Everyone's favorite Haskell IRC bot.

See the patch-tag.com crypto repository files Data/Digest.hs and Data/Cipher.hs for proposed Digest and Cipher typeclasses.

This would allow digests to be called with a simple "hash" function so long as they have an instance:

newtype SHA1 = SHA1 (Word32, Word32, Word32, Word32, Word32)
instance Digest SHA1 SHA1PartialCtx where
  --Code goes here...

And similarly for block/stream ciphers and RNGs. Also, slurp up the various other crypto libs on hackage.

Add website and darcs repo to Crypto.cabal.
Use test-framework.
Don't build tests by default - use a flag.
Is dominic.steinitz@blueyonder.co.uk still the correct contact email? If not, change it in CryptoHomePage.html
Does the readme *really* have to be in TeX?
Get a real bugtracker set up? code.haskell.org gives out trac hosting.
Holy crap that is a lot of warnings.
QuickCheck 2?
Echo hates Darcs with a passion.

@@ Line 68: / Line 68: @@
 ==Crypto 5.0 notes==
-TomMD's design for a digest class. From memory.
+See the patch-tag.com crypto repository files Data/Digest.hs and Data/Cipher.hs for proposed [http://patch-tag.com/r/crypto/snapshot/current/content/pretty/Data/Digest.hs Digest] and [http://patch-tag.com/r/crypto/snapshot/current/content/pretty/Data/Cipher.hs Cipher] typeclasses.
-<haskell>
-class Digest d s | d -> s where
--- Associated types are the new hotness. Should we be using them?
-    size :: d -> Int -- Size of a digest
-    extract :: d -> ByteString
-    -- Initial state of the hash function. Dependent on the length of the
-    -- message. Maybe we should let the hash function determine the precision
-    -- or absence of the length.
-    initial :: Word64 -> s
-    -- Chunkwise hashing. Needed to implement efficient hashing of lazy
-    -- bytestrings and efficient hashing of streams in general. OOH, an
-    -- application for iteratees! Hooray!
-    hashsome :: ByteString -> s -> s
-    finalize :: s -> d
-hash :: Digest d s => ByteString -> d
+This would allow digests to be called with a simple "hash" function so long as they have an instance:
-hash bs = finalize $ hashsome bs initial
-newtype SHA1 = SHA1 ByteString
+<haskell>
-instance Digest SHA1 SHA1State where
+newtype SHA1 = SHA1 (Word32, Word32, Word32, Word32, Word32)
+instance Digest SHA1 SHA1PartialCtx where
    --Code goes here...
 </haskell>