3 -- (c) The University of Glasgow 2002
5 -- Binary I/O library, with special tweaks for GHC
12 openBinIO, openBinIO_,
27 -- for writing instances:
40 getBinFileWithDict, -- :: Binary a => FilePath -> IO a
41 putBinFileWithDict, -- :: Binary a => FilePath -> Module -> a -> IO ()
47 import {-# SOURCE #-} Module
52 #if __GLASGOW_HASKELL__ < 503
60 import GlaExts hiding (ByteArray, newByteArray, freezeByteArray)
63 import PrelIOBase ( IOError(..), IOErrorType(..) )
64 import PrelReal ( Ratio(..) )
65 import PrelIOBase ( IO(..) )
73 import Data.Char ( ord, chr )
74 import Data.Array.Base ( unsafeRead, unsafeWrite )
75 import Control.Monad ( when )
76 import Control.Exception ( throw )
77 import System.IO as IO
78 import System.IO.Unsafe ( unsafeInterleaveIO )
79 import System.IO.Error ( mkIOError, eofErrorType )
80 import GHC.Real ( Ratio(..) )
82 import GHC.IOBase ( IO(..) )
83 import GHC.Word ( Word8(..) )
86 #if __GLASGOW_HASKELL__ < 503
87 type BinArray = MutableByteArray RealWorld Int
88 newArray_ bounds = stToIO (newCharArray bounds)
89 unsafeWrite arr ix e = stToIO (writeWord8Array arr ix e)
90 unsafeRead arr ix = stToIO (readWord8Array arr ix)
91 newByteArray# = newCharArray#
92 hPutArray h arr sz = hPutBufBAFull h arr sz
93 hGetArray h sz = hGetBufBAFull h sz
95 mkIOError :: IOErrorType -> String -> Maybe Handle -> Maybe FilePath -> Exception
96 mkIOError t location maybe_hdl maybe_filename
97 = IOException (IOError maybe_hdl t location "")
102 #define SIZEOF_HSINT INT_SIZE_IN_BYTES
105 #ifndef SIZEOF_HSWORD
106 #define SIZEOF_HSWORD WORD_SIZE_IN_BYTES
110 type BinArray = IOUArray Int Word8
114 = BinMem { -- binary data stored in an unboxed array
115 state :: BinHandleState, -- sigh, need parameterized modules :-)
116 off_r :: !FastMutInt, -- the current offset
117 sz_r :: !FastMutInt, -- size of the array (cached)
118 arr_r :: !(IORef BinArray) -- the array (bounds: (0,size-1))
120 -- XXX: should really store a "high water mark" for dumping out
121 -- the binary data to a file.
123 | BinIO { -- binary data stored in a file
124 state :: BinHandleState,
125 off_r :: !FastMutInt, -- the current offset (cached)
126 hdl :: !IO.Handle -- the file handle (must be seekable)
128 -- cache the file ptr in BinIO; using hTell is too expensive
129 -- to call repeatedly. If anyone else is modifying this Handle
130 -- at the same time, we'll be screwed.
132 newtype Bin a = BinPtr Int
133 deriving (Eq, Ord, Show, Bounded)
135 castBin :: Bin a -> Bin b
136 castBin (BinPtr i) = BinPtr i
139 put_ :: BinHandle -> a -> IO ()
140 put :: BinHandle -> a -> IO (Bin a)
141 get :: BinHandle -> IO a
143 -- define one of put_, put. Use of put_ is recommended because it
144 -- is more likely that tail-calls can kick in, and we rarely need the
145 -- position return value.
146 put_ bh a = do put bh a; return ()
147 put bh a = do p <- tellBin bh; put_ bh a; return p
149 putAt :: Binary a => BinHandle -> Bin a -> a -> IO ()
150 putAt bh p x = do seekBin bh p; put bh x; return ()
152 getAt :: Binary a => BinHandle -> Bin a -> IO a
153 getAt bh p = do seekBin bh p; get bh
155 openBinIO_ :: IO.Handle -> IO BinHandle
156 openBinIO_ h = openBinIO h noBinHandleUserData
158 openBinIO :: IO.Handle -> Module -> IO BinHandle
162 state <- newWriteState mod
163 return (BinIO state r h)
165 openBinMem :: Int -> Module -> IO BinHandle
167 | size <= 0 = error "Data.Binary.openBinMem: size must be >= 0"
169 arr <- newArray_ (0,size-1)
170 arr_r <- newIORef arr
171 ix_r <- newFastMutInt
172 writeFastMutInt ix_r 0
173 sz_r <- newFastMutInt
174 writeFastMutInt sz_r size
175 state <- newWriteState mod
176 return (BinMem state ix_r sz_r arr_r)
178 noBinHandleUserData = error "Binary.BinHandle: no user data"
180 getUserData :: BinHandle -> BinHandleState
181 getUserData bh = state bh
183 tellBin :: BinHandle -> IO (Bin a)
184 tellBin (BinIO _ r _) = do ix <- readFastMutInt r; return (BinPtr ix)
185 tellBin (BinMem _ r _ _) = do ix <- readFastMutInt r; return (BinPtr ix)
187 seekBin :: BinHandle -> Bin a -> IO ()
188 seekBin (BinIO _ ix_r h) (BinPtr p) = do
189 writeFastMutInt ix_r p
190 hSeek h AbsoluteSeek (fromIntegral p)
191 seekBin h@(BinMem _ ix_r sz_r a) (BinPtr p) = do
192 sz <- readFastMutInt sz_r
194 then do expandBin h p; writeFastMutInt ix_r p
195 else writeFastMutInt ix_r p
197 isEOFBin :: BinHandle -> IO Bool
198 isEOFBin (BinMem _ ix_r sz_r a) = do
199 ix <- readFastMutInt ix_r
200 sz <- readFastMutInt sz_r
202 isEOFBin (BinIO _ ix_r h) = hIsEOF h
204 writeBinMem :: BinHandle -> FilePath -> IO ()
205 writeBinMem (BinIO _ _ _) _ = error "Data.Binary.writeBinMem: not a memory handle"
206 writeBinMem (BinMem _ ix_r sz_r arr_r) fn = do
207 h <- openFile fn WriteMode
208 arr <- readIORef arr_r
209 ix <- readFastMutInt ix_r
211 #if __GLASGOW_HASKELL__ < 500
212 -- workaround a bug in ghc 4.08's implementation of hPutBuf (it doesn't
213 -- set the FILEOBJ_RW_WRITTEN flag on the file object, so the file doens't
214 -- get flushed properly). Adding an extra '\0' doens't do any harm.
219 readBinMem :: FilePath -> IO BinHandle
220 readBinMem filename = do
221 h <- openFile filename ReadMode
222 filesize' <- hFileSize h
223 let filesize = fromIntegral filesize'
224 arr <- newArray_ (0,filesize-1)
225 count <- hGetArray h arr filesize
226 when (count /= filesize)
227 (error ("Binary.readBinMem: only read " ++ show count ++ " bytes"))
229 arr_r <- newIORef arr
230 ix_r <- newFastMutInt
231 writeFastMutInt ix_r 0
232 sz_r <- newFastMutInt
233 writeFastMutInt sz_r filesize
234 return (BinMem initReadState ix_r sz_r arr_r)
236 -- expand the size of the array to include a specified offset
237 expandBin :: BinHandle -> Int -> IO ()
238 expandBin (BinMem _ ix_r sz_r arr_r) off = do
239 sz <- readFastMutInt sz_r
240 let sz' = head (dropWhile (<= off) (iterate (* 2) sz))
241 arr <- readIORef arr_r
242 arr' <- newArray_ (0,sz'-1)
243 sequence_ [ unsafeRead arr i >>= unsafeWrite arr' i
244 | i <- [ 0 .. sz-1 ] ]
245 writeFastMutInt sz_r sz'
246 writeIORef arr_r arr'
247 hPutStrLn stderr ("expanding to size: " ++ show sz')
249 expandBin (BinIO _ _ _) _ = return ()
250 -- no need to expand a file, we'll assume they expand by themselves.
252 -- -----------------------------------------------------------------------------
253 -- Low-level reading/writing of bytes
255 putWord8 :: BinHandle -> Word8 -> IO ()
256 putWord8 h@(BinMem _ ix_r sz_r arr_r) w = do
257 ix <- readFastMutInt ix_r
258 sz <- readFastMutInt sz_r
259 -- double the size of the array if it overflows
261 then do expandBin h ix
263 else do arr <- readIORef arr_r
265 writeFastMutInt ix_r (ix+1)
267 putWord8 (BinIO _ ix_r h) w = do
268 ix <- readFastMutInt ix_r
269 hPutChar h (chr (fromIntegral w)) -- XXX not really correct
270 writeFastMutInt ix_r (ix+1)
273 getWord8 :: BinHandle -> IO Word8
274 getWord8 (BinMem _ ix_r sz_r arr_r) = do
275 ix <- readFastMutInt ix_r
276 sz <- readFastMutInt sz_r
278 throw (mkIOError eofErrorType "Data.Binary.getWord8" Nothing Nothing)
279 arr <- readIORef arr_r
280 w <- unsafeRead arr ix
281 writeFastMutInt ix_r (ix+1)
283 getWord8 (BinIO _ ix_r h) = do
284 ix <- readFastMutInt ix_r
286 writeFastMutInt ix_r (ix+1)
287 return (fromIntegral (ord c)) -- XXX not really correct
289 putByte :: BinHandle -> Word8 -> IO ()
290 putByte bh w = put_ bh w
292 getByte :: BinHandle -> IO Word8
295 -- -----------------------------------------------------------------------------
296 -- Primitve Word writes
298 instance Binary Word8 where
302 instance Binary Word16 where
303 put_ h w = do -- XXX too slow.. inline putWord8?
304 putByte h (fromIntegral (w `shiftR` 8))
305 putByte h (fromIntegral (w .&. 0xff))
309 return ((fromIntegral w1 `shiftL` 8) .|. fromIntegral w2)
312 instance Binary Word32 where
314 putByte h (fromIntegral (w `shiftR` 24))
315 putByte h (fromIntegral ((w `shiftR` 16) .&. 0xff))
316 putByte h (fromIntegral ((w `shiftR` 8) .&. 0xff))
317 putByte h (fromIntegral (w .&. 0xff))
323 return ((fromIntegral w1 `shiftL` 24) .|.
324 (fromIntegral w2 `shiftL` 16) .|.
325 (fromIntegral w3 `shiftL` 8) .|.
329 instance Binary Word64 where
331 putByte h (fromIntegral (w `shiftR` 56))
332 putByte h (fromIntegral ((w `shiftR` 48) .&. 0xff))
333 putByte h (fromIntegral ((w `shiftR` 40) .&. 0xff))
334 putByte h (fromIntegral ((w `shiftR` 32) .&. 0xff))
335 putByte h (fromIntegral ((w `shiftR` 24) .&. 0xff))
336 putByte h (fromIntegral ((w `shiftR` 16) .&. 0xff))
337 putByte h (fromIntegral ((w `shiftR` 8) .&. 0xff))
338 putByte h (fromIntegral (w .&. 0xff))
348 return ((fromIntegral w1 `shiftL` 56) .|.
349 (fromIntegral w2 `shiftL` 48) .|.
350 (fromIntegral w3 `shiftL` 40) .|.
351 (fromIntegral w4 `shiftL` 32) .|.
352 (fromIntegral w5 `shiftL` 24) .|.
353 (fromIntegral w6 `shiftL` 16) .|.
354 (fromIntegral w7 `shiftL` 8) .|.
357 -- -----------------------------------------------------------------------------
358 -- Primitve Int writes
360 instance Binary Int8 where
361 put_ h w = put_ h (fromIntegral w :: Word8)
362 get h = do w <- get h; return (fromIntegral (w::Word8))
364 instance Binary Int16 where
365 put_ h w = put_ h (fromIntegral w :: Word16)
366 get h = do w <- get h; return (fromIntegral (w::Word16))
368 instance Binary Int32 where
369 put_ h w = put_ h (fromIntegral w :: Word32)
370 get h = do w <- get h; return (fromIntegral (w::Word32))
372 instance Binary Int64 where
373 put_ h w = put_ h (fromIntegral w :: Word64)
374 get h = do w <- get h; return (fromIntegral (w::Word64))
376 -- -----------------------------------------------------------------------------
377 -- Instances for standard types
379 instance Binary () where
380 put_ bh () = return ()
382 -- getF bh p = case getBitsF bh 0 p of (_,b) -> ((),b)
384 instance Binary Bool where
385 put_ bh b = putByte bh (fromIntegral (fromEnum b))
386 get bh = do x <- getWord8 bh; return (toEnum (fromIntegral x))
387 -- getF bh p = case getBitsF bh 1 p of (x,b) -> (toEnum x,b)
389 instance Binary Char where
390 put_ bh c = put_ bh (fromIntegral (ord c) :: Word32)
391 get bh = do x <- get bh; return (chr (fromIntegral (x :: Word32)))
392 -- getF bh p = case getBitsF bh 8 p of (x,b) -> (toEnum x,b)
394 instance Binary Int where
395 #if SIZEOF_HSINT == 4
396 put_ bh i = put_ bh (fromIntegral i :: Int32)
399 return (fromIntegral (x :: Int32))
400 #elif SIZEOF_HSINT == 8
401 put_ bh i = put_ bh (fromIntegral i :: Int64)
404 return (fromIntegral (x :: Int64))
406 #error "unsupported sizeof(HsInt)"
408 -- getF bh = getBitsF bh 32
410 instance Binary a => Binary [a] where
411 put_ bh [] = putByte bh 0
412 put_ bh (x:xs) = do putByte bh 1; put_ bh x; put_ bh xs
413 get bh = do h <- getWord8 bh
420 instance (Binary a, Binary b) => Binary (a,b) where
421 put_ bh (a,b) = do put_ bh a; put_ bh b
422 get bh = do a <- get bh
426 instance (Binary a, Binary b, Binary c) => Binary (a,b,c) where
427 put_ bh (a,b,c) = do put_ bh a; put_ bh b; put_ bh c
428 get bh = do a <- get bh
433 instance (Binary a, Binary b, Binary c, Binary d) => Binary (a,b,c,d) where
434 put_ bh (a,b,c,d) = do put_ bh a; put_ bh b; put_ bh c; put_ bh d
435 get bh = do a <- get bh
441 instance Binary a => Binary (Maybe a) where
442 put_ bh Nothing = putByte bh 0
443 put_ bh (Just a) = do putByte bh 1; put_ bh a
444 get bh = do h <- getWord8 bh
447 _ -> do x <- get bh; return (Just x)
449 instance (Binary a, Binary b) => Binary (Either a b) where
450 put_ bh (Left a) = do putByte bh 0; put_ bh a
451 put_ bh (Right b) = do putByte bh 1; put_ bh b
452 get bh = do h <- getWord8 bh
454 0 -> do a <- get bh ; return (Left a)
455 _ -> do b <- get bh ; return (Right b)
457 #ifdef __GLASGOW_HASKELL__
458 instance Binary Integer where
459 put_ bh (S# i#) = do putByte bh 0; put_ bh (I# i#)
460 put_ bh (J# s# a#) = do
463 let sz# = sizeofByteArray# a# -- in *bytes*
464 put_ bh (I# sz#) -- in *bytes*
465 putByteArray bh a# sz#
470 0 -> do (I# i#) <- get bh
472 _ -> do (I# s#) <- get bh
474 (BA a#) <- getByteArray bh sz
477 putByteArray :: BinHandle -> ByteArray# -> Int# -> IO ()
478 putByteArray bh a s# = loop 0#
480 | n# ==# s# = return ()
482 putByte bh (indexByteArray a n#)
485 getByteArray :: BinHandle -> Int -> IO ByteArray
486 getByteArray bh (I# sz) = do
487 (MBA arr) <- newByteArray sz
489 | n ==# sz = return ()
492 writeByteArray arr n w
498 data ByteArray = BA ByteArray#
499 data MBA = MBA (MutableByteArray# RealWorld)
501 newByteArray :: Int# -> IO MBA
502 newByteArray sz = IO $ \s ->
503 case newByteArray# sz s of { (# s, arr #) ->
506 freezeByteArray :: MutableByteArray# RealWorld -> IO ByteArray
507 freezeByteArray arr = IO $ \s ->
508 case unsafeFreezeByteArray# arr s of { (# s, arr #) ->
511 writeByteArray :: MutableByteArray# RealWorld -> Int# -> Word8 -> IO ()
513 #if __GLASGOW_HASKELL__ < 503
514 writeByteArray arr i w8 = IO $ \s ->
515 case word8ToWord w8 of { W# w# ->
516 case writeCharArray# arr i (chr# (word2Int# w#)) s of { s ->
519 writeByteArray arr i (W8# w) = IO $ \s ->
520 case writeWord8Array# arr i w s of { s ->
524 #if __GLASGOW_HASKELL__ < 503
525 indexByteArray a# n# = fromIntegral (I# (ord# (indexCharArray# a# n#)))
527 indexByteArray a# n# = W8# (indexWord8Array# a# n#)
530 instance (Integral a, Binary a) => Binary (Ratio a) where
531 put_ bh (a :% b) = do put_ bh a; put_ bh b
532 get bh = do a <- get bh; b <- get bh; return (a :% b)
535 instance Binary (Bin a) where
536 put_ bh (BinPtr i) = put_ bh i
537 get bh = do i <- get bh; return (BinPtr i)
539 -- -----------------------------------------------------------------------------
540 -- unboxed mutable Ints
542 #ifdef __GLASGOW_HASKELL__
543 data FastMutInt = FastMutInt (MutableByteArray# RealWorld)
545 newFastMutInt = IO $ \s ->
546 case newByteArray# size s of { (# s, arr #) ->
547 (# s, FastMutInt arr #) }
548 where I# size = SIZEOF_HSWORD
550 readFastMutInt (FastMutInt arr) = IO $ \s ->
551 case readIntArray# arr 0# s of { (# s, i #) ->
554 writeFastMutInt (FastMutInt arr) (I# i) = IO $ \s ->
555 case writeIntArray# arr 0# i s of { s ->
559 -- -----------------------------------------------------------------------------
560 -- Lazy reading/writing
562 lazyPut :: Binary a => BinHandle -> a -> IO ()
564 -- output the obj with a ptr to skip over it:
566 put_ bh pre_a -- save a slot for the ptr
567 put_ bh a -- dump the object
568 q <- tellBin bh -- q = ptr to after object
569 putAt bh pre_a q -- fill in slot before a with ptr to q
570 seekBin bh q -- finally carry on writing at q
572 lazyGet :: Binary a => BinHandle -> IO a
574 p <- get bh -- a BinPtr
576 a <- unsafeInterleaveIO (getAt bh p_a)
577 seekBin bh p -- skip over the object for now
580 -- -----------------------------------------------------------------------------
583 type BinHandleState =
586 IORef (UniqFM (Int,FastString)),
587 Array Int FastString)
589 initReadState :: BinHandleState
590 initReadState = (undef, undef, undef, undef)
592 newWriteState :: Module -> IO BinHandleState
595 out_r <- newIORef emptyUFM
596 return (m,j_r,out_r,undef)
598 undef = error "Binary.BinHandleState"
600 -- -----------------------------------------------------------------------------
601 -- FastString binary interface
603 getBinFileWithDict :: Binary a => FilePath -> IO a
604 getBinFileWithDict file_path = do
605 bh <- Binary.readBinMem file_path
606 dict_p <- Binary.get bh -- get the dictionary ptr
609 dict <- getDictionary bh
611 let (mod, j_r, out_r, _) = state bh
612 get bh{ state = (mod,j_r,out_r,dict) }
614 initBinMemSize = (1024*1024) :: Int
616 putBinFileWithDict :: Binary a => FilePath -> Module -> a -> IO ()
617 putBinFileWithDict file_path mod a = do
618 bh <- openBinMem initBinMemSize mod
620 put_ bh p -- placeholder for ptr to dictionary
622 let (_, j_r, fm_r, _) = state bh
626 putAt bh p dict_p -- fill in the placeholder
627 seekBin bh dict_p -- seek back to the end of the file
628 putDictionary bh j (constructDictionary j fm)
629 writeBinMem bh file_path
631 type Dictionary = Array Int FastString
632 -- should be 0-indexed
634 putDictionary :: BinHandle -> Int -> Dictionary -> IO ()
635 putDictionary bh sz dict = do
637 mapM_ (putFS bh) (elems dict)
639 getDictionary :: BinHandle -> IO Dictionary
640 getDictionary bh = do
642 elems <- sequence (take sz (repeat (getFS bh)))
643 return (listArray (0,sz-1) elems)
645 constructDictionary :: Int -> UniqFM (Int,FastString) -> Dictionary
646 constructDictionary j fm = array (0,j-1) (eltsUFM fm)
648 putFS bh (FastString id l ba) = do
651 putFS bh s = error ("Binary.put_(FastString): " ++ unpackFS s)
652 -- Note: the length of the FastString is *not* the same as
653 -- the size of the ByteArray: the latter is rounded up to a
654 -- multiple of the word size.
658 (BA ba) <- getByteArray bh (I# l)
659 return (mkFastSubStringBA# ba 0# l)
660 -- XXX ToDo: one too many copies here
662 instance Binary FastString where
663 put_ bh f@(FastString id l ba) =
664 case getUserData bh of { (_, j_r, out_r, dict) -> do
665 out <- readIORef out_r
666 let uniq = getUnique f
667 case lookupUFM out uniq of
668 Just (j,f) -> put_ bh j
673 writeIORef out_r (addToUFM out uniq (j,f))
675 put_ bh s = error ("Binary.put_(FastString): " ++ show (unpackFS s))
679 case getUserData bh of (_, _, _, arr) -> return (arr ! j)