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> Haskell Core Libraries (base package) Parent Contents Index GHC.Handle Portability non-portable Stability internal Maintainer libraries@haskell.org Description This module defines the basic operations on I/O "handles". Synopsis withHandle :: String -> Handle -> (Handle__ -> IO (Handle__, a)) -> IO a withHandle' :: String -> Handle -> MVar Handle__ -> (Handle__ -> IO (Handle__, a)) -> IO a withHandle_ :: String -> Handle -> (Handle__ -> IO a) -> IO a wantWritableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a wantReadableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a wantSeekableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a newEmptyBuffer :: RawBuffer -> BufferState -> Int -> Buffer allocateBuffer :: Int -> BufferState -> IO Buffer readCharFromBuffer :: RawBuffer -> Int -> IO (Char, Int) writeCharIntoBuffer :: RawBuffer -> Int -> Char -> IO Int flushWriteBufferOnly :: Handle__ -> IO () flushWriteBuffer :: FD -> Bool -> Buffer -> IO Buffer flushReadBuffer :: FD -> Buffer -> IO Buffer fillReadBuffer :: FD -> Bool -> Bool -> Buffer -> IO Buffer read_off :: FD -> Bool -> Ptr CChar -> Int -> CInt -> IO CInt read_off_ba :: FD -> Bool -> RawBuffer -> Int -> CInt -> IO CInt write_off :: CInt -> Bool -> Ptr CChar -> Int -> CInt -> IO CInt write_off_ba :: CInt -> Bool -> RawBuffer -> Int -> CInt -> IO CInt ioe_closedHandle :: IO a ioe_EOF :: IO a ioe_notReadable :: IO a ioe_notWritable :: IO a stdin :: Handle stdout :: Handle stderr :: Handle data IOMode = ReadMode | WriteMode | AppendMode | ReadWriteMode data IOModeEx = BinaryMode IOMode | TextMode IOMode openFile :: FilePath -> IOMode -> IO Handle openFileEx :: FilePath -> IOModeEx -> IO Handle openFd :: FD -> Maybe FDType -> FilePath -> IOMode -> Bool -> Bool -> IO Handle hFileSize :: Handle -> IO Integer hIsEOF :: Handle -> IO Bool isEOF :: IO Bool hLookAhead :: Handle -> IO Char hSetBuffering :: Handle -> BufferMode -> IO () hSetBinaryMode :: Handle -> Bool -> IO () hFlush :: Handle -> IO () hClose :: Handle -> IO () hClose_help :: Handle__ -> IO Handle__ data HandlePosn = HandlePosn Handle HandlePosition hGetPosn :: Handle -> IO HandlePosn hSetPosn :: HandlePosn -> IO () data SeekMode = AbsoluteSeek | RelativeSeek | SeekFromEnd hSeek :: Handle -> SeekMode -> Integer -> IO () hTell :: Handle -> IO Integer hIsOpen :: Handle -> IO Bool hIsClosed :: Handle -> IO Bool hIsReadable :: Handle -> IO Bool hIsWritable :: Handle -> IO Bool hGetBuffering :: Handle -> IO BufferMode hIsSeekable :: Handle -> IO Bool hSetEcho :: Handle -> Bool -> IO () hGetEcho :: Handle -> IO Bool hIsTerminalDevice :: Handle -> IO Bool Documentation withHandle :: String -> Handle -> (Handle__ -> IO (Handle__, a)) -> IO a withHandle' :: String -> Handle -> MVar Handle__ -> (Handle__ -> IO (Handle__, a)) -> IO a withHandle_ :: String -> Handle -> (Handle__ -> IO a) -> IO a wantWritableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a wantReadableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a wantSeekableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a newEmptyBuffer :: RawBuffer -> BufferState -> Int -> Buffer allocateBuffer :: Int -> BufferState -> IO Buffer readCharFromBuffer :: RawBuffer -> Int -> IO (Char, Int) writeCharIntoBuffer :: RawBuffer -> Int -> Char -> IO Int flushWriteBufferOnly :: Handle__ -> IO () flushWriteBuffer :: FD -> Bool -> Buffer -> IO Buffer flushReadBuffer :: FD -> Buffer -> IO Buffer fillReadBuffer :: FD -> Bool -> Bool -> Buffer -> IO Buffer read_off :: FD -> Bool -> Ptr CChar -> Int -> CInt -> IO CInt read_off_ba :: FD -> Bool -> RawBuffer -> Int -> CInt -> IO CInt write_off :: CInt -> Bool -> Ptr CChar -> Int -> CInt -> IO CInt write_off_ba :: CInt -> Bool -> RawBuffer -> Int -> CInt -> IO CInt ioe_closedHandle :: IO a ioe_EOF :: IO a ioe_notReadable :: IO a ioe_notWritable :: IO a stdin :: Handle stdout :: Handle stderr :: Handle data IOMode Constructors ReadMode WriteMode AppendMode ReadWriteMode data IOModeEx Constructors BinaryMode IOMode TextMode IOMode openFile :: FilePath -> IOMode -> IO Handle openFileEx :: FilePath -> IOModeEx -> IO Handle openFd :: FD -> Maybe FDType -> FilePath -> IOMode -> Bool -> Bool -> IO Handle hFileSize :: Handle -> IO Integer hIsEOF :: Handle -> IO Bool isEOF :: IO Bool hLookAhead :: Handle -> IO Char hSetBuffering :: Handle -> BufferMode -> IO () hSetBinaryMode :: Handle -> Bool -> IO () On Windows, reading a file in text mode (which is the default) will translate CRLF to LF, and writing will translate LF to CRLF. This is usually what you want with text files. With binary files this is undesirable; also, as usual under Microsoft operating systems, text mode treats control-Z as EOF. Setting binary mode using hSetBinaryMode turns off all special treatment of end-of-line and end-of-file characters. hFlush :: Handle -> IO () hClose :: Handle -> IO () hClose_help :: Handle__ -> IO Handle__ data HandlePosn Constructors HandlePosn Handle HandlePosition Instances Eq HandlePosn Show HandlePosn hGetPosn :: Handle -> IO HandlePosn hSetPosn :: HandlePosn -> IO () data SeekMode Constructors AbsoluteSeek RelativeSeek SeekFromEnd hSeek :: Handle -> SeekMode -> Integer -> IO () hTell :: Handle -> IO Integer hIsOpen :: Handle -> IO Bool hIsClosed :: Handle -> IO Bool hIsReadable :: Handle -> IO Bool hIsWritable :: Handle -> IO Bool hGetBuffering :: Handle -> IO BufferMode hIsSeekable :: Handle -> IO Bool hSetEcho :: Handle -> Bool -> IO () hGetEcho :: Handle -> IO Bool hIsTerminalDevice :: Handle -> IO Bool Produced by Haddock version 0.4