#if __GLASGOW_HASKELL__ >= 702
#endif
module Data.Text.IO
(
readFile
, writeFile
, appendFile
, hGetContents
, hGetChunk
, hGetLine
, hPutStr
, hPutStrLn
, interact
, getContents
, getLine
, putStr
, putStrLn
) where
import Data.Text (Text)
import Prelude hiding (appendFile, getContents, getLine, interact,
putStr, putStrLn, readFile, writeFile)
import System.IO (Handle, IOMode(..), hPutChar, openFile, stdin, stdout,
withFile)
import qualified Control.Exception as E
import Control.Monad (liftM2, when)
import Data.IORef (readIORef, writeIORef)
import qualified Data.Text as T
import Data.Text.Internal.Fusion (stream)
import Data.Text.Internal.Fusion.Types (Step(..), Stream(..))
import Data.Text.Internal.IO (hGetLineWith, readChunk)
import GHC.IO.Buffer (Buffer(..), BufferState(..), CharBufElem, CharBuffer,
RawCharBuffer, emptyBuffer, isEmptyBuffer, newCharBuffer,
writeCharBuf)
import GHC.IO.Exception (IOException(ioe_type), IOErrorType(InappropriateType))
import GHC.IO.Handle.Internals (augmentIOError, hClose_help, wantReadableHandle,
wantWritableHandle)
import GHC.IO.Handle.Text (commitBuffer')
import GHC.IO.Handle.Types (BufferList(..), BufferMode(..), Handle__(..),
HandleType(..), Newline(..))
import System.IO (hGetBuffering, hFileSize, hSetBuffering, hTell)
import System.IO.Error (isEOFError)
readFile :: FilePath -> IO Text
readFile name = openFile name ReadMode >>= hGetContents
writeFile :: FilePath -> Text -> IO ()
writeFile p = withFile p WriteMode . flip hPutStr
appendFile :: FilePath -> Text -> IO ()
appendFile p = withFile p AppendMode . flip hPutStr
catchError :: String -> Handle -> Handle__ -> IOError -> IO (Text, Bool)
catchError caller h Handle__{..} err
| isEOFError err = do
buf <- readIORef haCharBuffer
return $ if isEmptyBuffer buf
then (T.empty, True)
else (T.singleton '\r', True)
| otherwise = E.throwIO (augmentIOError err caller h)
readChunkEof :: Handle__ -> CharBuffer -> IO (Text, Bool)
readChunkEof hh buf = do t <- readChunk hh buf
return (t, False)
hGetChunk :: Handle -> IO Text
hGetChunk h = wantReadableHandle "hGetChunk" h readSingleChunk
where
readSingleChunk hh@Handle__{..} = do
buf <- readIORef haCharBuffer
(t, _) <- readChunkEof hh buf `E.catch` catchError "hGetChunk" h hh
return (hh, t)
hGetContents :: Handle -> IO Text
hGetContents h = do
chooseGoodBuffering h
wantReadableHandle "hGetContents" h readAll
where
readAll hh@Handle__{..} = do
let readChunks = do
buf <- readIORef haCharBuffer
(t, eof) <- readChunkEof hh buf
`E.catch` catchError "hGetContents" h hh
if eof
then return [t]
else (t:) `fmap` readChunks
ts <- readChunks
(hh', _) <- hClose_help hh
return (hh'{haType=ClosedHandle}, T.concat ts)
chooseGoodBuffering :: Handle -> IO ()
chooseGoodBuffering h = do
bufMode <- hGetBuffering h
case bufMode of
BlockBuffering Nothing -> do
d <- E.catch (liftM2 () (hFileSize h) (hTell h)) $ \(e::IOException) ->
if ioe_type e == InappropriateType
then return 16384
else E.throwIO e
when (d > 0) . hSetBuffering h . BlockBuffering . Just . fromIntegral $ d
_ -> return ()
hGetLine :: Handle -> IO Text
hGetLine = hGetLineWith T.concat
hPutStr :: Handle -> Text -> IO ()
hPutStr h t = do
(buffer_mode, nl) <-
wantWritableHandle "hPutStr" h $ \h_ -> do
bmode <- getSpareBuffer h_
return (bmode, haOutputNL h_)
let str = stream t
case buffer_mode of
(NoBuffering, _) -> hPutChars h str
(LineBuffering, buf) -> writeLines h nl buf str
(BlockBuffering _, buf)
| nl == CRLF -> writeBlocksCRLF h buf str
| otherwise -> writeBlocksRaw h buf str
hPutChars :: Handle -> Stream Char -> IO ()
hPutChars h (Stream next0 s0 _len) = loop s0
where
loop !s = case next0 s of
Done -> return ()
Skip s' -> loop s'
Yield x s' -> hPutChar h x >> loop s'
writeLines :: Handle -> Newline -> Buffer CharBufElem -> Stream Char -> IO ()
writeLines h nl buf0 (Stream next0 s0 _len) = outer s0 buf0
where
outer s1 Buffer{bufRaw=raw, bufSize=len} = inner s1 (0::Int)
where
inner !s !n =
case next0 s of
Done -> commit n False True >> return ()
Skip s' -> inner s' n
Yield x s'
| n + 1 >= len -> commit n True False >>= outer s
| x == '\n' -> do
n' <- if nl == CRLF
then do n1 <- writeCharBuf raw n '\r'
writeCharBuf raw n1 '\n'
else writeCharBuf raw n x
commit n' True False >>= outer s'
| otherwise -> writeCharBuf raw n x >>= inner s'
commit = commitBuffer h raw len
writeBlocksCRLF :: Handle -> Buffer CharBufElem -> Stream Char -> IO ()
writeBlocksCRLF h buf0 (Stream next0 s0 _len) = outer s0 buf0
where
outer s1 Buffer{bufRaw=raw, bufSize=len} = inner s1 (0::Int)
where
inner !s !n =
case next0 s of
Done -> commit n False True >> return ()
Skip s' -> inner s' n
Yield x s'
| n + 1 >= len -> commit n True False >>= outer s
| x == '\n' -> do n1 <- writeCharBuf raw n '\r'
writeCharBuf raw n1 '\n' >>= inner s'
| otherwise -> writeCharBuf raw n x >>= inner s'
commit = commitBuffer h raw len
writeBlocksRaw :: Handle -> Buffer CharBufElem -> Stream Char -> IO ()
writeBlocksRaw h buf0 (Stream next0 s0 _len) = outer s0 buf0
where
outer s1 Buffer{bufRaw=raw, bufSize=len} = inner s1 (0::Int)
where
inner !s !n =
case next0 s of
Done -> commit n False True >> return ()
Skip s' -> inner s' n
Yield x s'
| n + 1 >= len -> commit n True False >>= outer s
| otherwise -> writeCharBuf raw n x >>= inner s'
commit = commitBuffer h raw len
getSpareBuffer :: Handle__ -> IO (BufferMode, CharBuffer)
getSpareBuffer Handle__{haCharBuffer=ref,
haBuffers=spare_ref,
haBufferMode=mode}
= do
case mode of
NoBuffering -> return (mode, error "no buffer!")
_ -> do
bufs <- readIORef spare_ref
buf <- readIORef ref
case bufs of
BufferListCons b rest -> do
writeIORef spare_ref rest
return ( mode, emptyBuffer b (bufSize buf) WriteBuffer)
BufferListNil -> do
new_buf <- newCharBuffer (bufSize buf) WriteBuffer
return (mode, new_buf)
commitBuffer :: Handle -> RawCharBuffer -> Int -> Int -> Bool -> Bool
-> IO CharBuffer
commitBuffer hdl !raw !sz !count flush release =
wantWritableHandle "commitAndReleaseBuffer" hdl $
commitBuffer' raw sz count flush release
hPutStrLn :: Handle -> Text -> IO ()
hPutStrLn h t = hPutStr h t >> hPutChar h '\n'
interact :: (Text -> Text) -> IO ()
interact f = putStr . f =<< getContents
getContents :: IO Text
getContents = hGetContents stdin
getLine :: IO Text
getLine = hGetLine stdin
putStr :: Text -> IO ()
putStr = hPutStr stdout
putStrLn :: Text -> IO ()
putStrLn = hPutStrLn stdout