Hi!
On Fri, Dec 18, 2009 at 1:53 AM, Jason Dusek
You shouldn't have to use `malloc` and `free` to accumulate input. Just append to a list or a ByteString, which is to say, add a byte to a ByteString to get a new ByteString. Yes, really.
Oh, I did not know that ByteString has hGetNonBlocking. When I see that System.IO's hGetBufNonBlocking uses Ptr I started crying and kept crying while coding with it. It was really strange for me to use Foreign.* modules for code which should be clean Haskell.
Maybe there is something I am missing here; but I can't see any reason to adopt this unnatural (for Haskell) approach.
I checked ByteString's hGetNonBlocking now and I do see why it is still better to use System.IO's hGetBufNonBlocking. I would like to have a buffer of fixed length and just fill it until it is full. With hGetBufNonBlocking this is possible as I can just give different starting positions in the buffer while retaining data already read where it is (so I do not to copy anything around). But with hGetNonBlocking I would have to append two different buffers to get a resulting buffer, what is completely unnecessary O(n). Why would I read data into some other buffer just to be able to append it to main buffer later. Any suggestion how can I do that in Haskell why? Mitar