Safe Haskell	Safe
Language	Haskell2010

Bio.Iteratee.IO.Base

Synopsis

Documentation

type FileOffset = COff #

myfdRead :: Fd -> Ptr CChar -> ByteCount -> IO (Either Errno ByteCount) Source #

Alas, GHC provides no function to read from Fd to an allocated buffer. The library function fdRead is not appropriate as it returns a string already. I'd rather get data from a buffer. Furthermore, fdRead (at least in GHC) allocates a new buffer each time it is called. This is a waste. Yet another problem with fdRead is in raising an exception on any IOError or even EOF. I'd rather avoid exceptions altogether.

myfdSeek :: Fd -> SeekMode -> FileOffset -> IO (Either Errno FileOffset) Source #

The following fseek procedure throws no exceptions.

newtype Errno :: * #

Haskell representation for errno values. The implementation is deliberately exposed, to allow users to add their own definitions of Errno values.

Constructors

Errno CInt

Instances

Eq Errno
Methods (==) :: Errno -> Errno -> Bool # (/=) :: Errno -> Errno -> Bool #

select'read'pending :: [Fd] -> IO (Either Errno [Fd]) Source #

poll if file descriptors have something to read Return the list of read-pending descriptors