module Data.Pipe.ByteString (fromHandleLn, toHandleLn, fromFileLn, toFileLn) where
import "monads-tf" Control.Monad.Trans
import Control.Monad.Trans.Control
import Data.Pipe
import System.IO
import qualified Data.ByteString.Char8 as BSC
fromHandleLn :: MonadIO m => Handle -> Pipe () BSC.ByteString m ()
fromHandleLn h = liftIO (BSC.hGetLine h) >>= (>> fromHandleLn h) . yield
toHandleLn :: MonadIO m => Handle -> Pipe BSC.ByteString () m ()
toHandleLn h =
await >>= maybe (return ()) ((>> toHandleLn h) . liftIO . BSC.hPutStrLn h)
fromFileLn :: (MonadIO m, MonadBaseControl IO m) =>
FilePath -> Pipe () BSC.ByteString m ()
fromFileLn fp =
bracket (liftIO $ openFile fp ReadMode) (liftIO . hClose) fromHandleLn
toFileLn :: (MonadIO m, MonadBaseControl IO m) =>
FilePath -> Pipe BSC.ByteString () m ()
toFileLn fp = bracket (liftIO $ openFile fp WriteMode) (liftIO . hClose) toHandleLn