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{- git-annex meters
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Meters where
import Common
import Types.Meters
import Utility.Observed
import qualified Data.ByteString.Lazy as L
{- Sends the content of a file to an action, updating the meter as it's
- consumed. -}
withMeteredFile :: FilePath -> MeterUpdate -> (L.ByteString -> IO a) -> IO a
withMeteredFile f meterupdate a = withBinaryFile f ReadMode $ \h ->
hGetContentsObserved h (meterupdate . toInteger) >>= a
{- Sends the content of a file to a Handle, updating the meter as it's
- written. -}
sendMeteredFile :: FilePath -> MeterUpdate -> Handle -> IO ()
sendMeteredFile f meterupdate h = withMeteredFile f meterupdate $ L.hPut h
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