Sorry took so long to get back... Thank you for the response. Been really busy lately :-) On Sat, May 16, 2009 at 3:46 AM, Khudyakov Alexey <alexey.skladnoy@gmail.com
wrote:
On Friday 15 May 2009 06:52:29 David Leimbach wrote:
I actually need little endian encoding... wondering if anyone else hit this with Data.Binary. (because I'm working with Bell Lab's 9P protocol which does encode things on the network in little-endian order). Anyone got some "tricks" for this?
Dave
You could just define data type and Binary instance for 9P messages. Something like this:
P9Message = Tversion { tag :: Word16, msize :: Word32, version :: String } | ...
instance Binary P9Message where put (Tverstion t m v) = putWord16le t >> putWord32le m >> put v -- and so on...
get = do length <- getWord32le id <- getWord16le case is of p9TMessage -> do ...
There are a lot of boilerplate code thought...
Thank you, this still looks like a useful way to proceed, combined with the BinaryLE approach perhaps, to avoid a lot of boilerplate.
BTW could you say what do you want to do with 9P? I tried to play with it using libixp library but without any success. It was mainly to understand how does it works and how can it be used.
From a services point of view, 9P gives you a way to host them, and even devices, on a network share that can be "mounted" into the filesystem's namespace. The net result is you've plugged into the standard unix utilities that do open, read, write etc, and can do a lot of interesting things with mere shell scripts.
Operating systems that can be clients of a 9P service include Linux, Inferno, Plan 9, and anything else that runs FUSE 9P (several BSDs).
From a client perspective, having a 9P implementation gives you a more fine-grained programatic interface to accessing other 9P services.
There are also a lot of 9P implementations in many languages that you can interoperate with: http://9p.cat-v.org/implementations
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