Copyright	(c) Edward Kmett 2013-2015
License	BSD3
Maintainer	Edward Kmett <ekmett@gmail.com>
Stability	experimental
Portability	type-families
Safe Haskell	Trustworthy
Language	Haskell98

Data.Bytes.Get

Description

This module generalizes the binary Get and cereal Get monads in an ad hoc fashion to permit code to be written that is compatible across them.

Moreover, this class permits code to be written to be portable over various monad transformers applied to these as base monads.

Synopsis

class (forall a b. Coercible a b => Coercible (m a) (m b), Integral (Remaining m), MonadFail m, Applicative m) => MonadGet m where
- type Remaining m :: *
- type Bytes m :: *
- skip :: Int -> m ()
- ensure :: Int -> m ByteString
- lookAhead :: m a -> m a
- lookAheadM :: m (Maybe a) -> m (Maybe a)
- lookAheadE :: m (Either a b) -> m (Either a b)
- getBytes :: Int -> m ByteString
- remaining :: m (Remaining m)
- isEmpty :: m Bool
- getWord8 :: m Word8
- getByteString :: Int -> m ByteString
- getLazyByteString :: Int64 -> m ByteString
- getWord16be :: m Word16
- getWord16le :: m Word16
- getWord16host :: m Word16
- getWord32be :: m Word32
- getWord32le :: m Word32
- getWord32host :: m Word32
- getWord64be :: m Word64
- getWord64le :: m Word64
- getWord64host :: m Word64
- getWordhost :: m Word
runGetL :: Get a -> ByteString -> a
runGetS :: Get a -> ByteString -> Either String a

Documentation

class (forall a b. Coercible a b => Coercible (m a) (m b), Integral (Remaining m), MonadFail m, Applicative m) => MonadGet m where Source #

Minimal complete definition

lookAhead, lookAheadM, lookAheadE

Associated Types

type Remaining m :: * Source #

An Integral number type used for unchecked skips and counting.

type Bytes m :: * Source #

The underlying ByteString type used by this instance

Methods

skip :: Int -> m () Source #

Skip ahead n bytes. Fails if fewer than n bytes are available.

default skip :: (MonadTrans t, MonadGet n, m ~ t n) => Int -> m () Source #

ensure :: Int -> m ByteString Source #

If at least n bytes are available return at least that much of the current input. Otherwise fail.

default ensure :: (MonadTrans t, MonadGet n, m ~ t n) => Int -> m ByteString Source #

lookAhead :: m a -> m a Source #

Run ga, but return without consuming its input. Fails if ga fails.

lookAheadM :: m (Maybe a) -> m (Maybe a) Source #

Like lookAhead, but consume the input if gma returns 'Just _'. Fails if gma fails.

lookAheadE :: m (Either a b) -> m (Either a b) Source #

Like lookAhead, but consume the input if gea returns 'Right _'. Fails if gea fails.

getBytes :: Int -> m ByteString Source #

Pull n bytes from the input, as a strict ByteString.

default getBytes :: (MonadTrans t, MonadGet n, m ~ t n) => Int -> m ByteString Source #

remaining :: m (Remaining m) Source #

Get the number of remaining unparsed bytes. Useful for checking whether all input has been consumed. Note that this forces the rest of the input.

default remaining :: (MonadTrans t, MonadGet n, m ~ t n, Remaining m ~ Remaining n) => m (Remaining m) Source #

isEmpty :: m Bool Source #

Test whether all input has been consumed, i.e. there are no remaining unparsed bytes.

default isEmpty :: (MonadTrans t, MonadGet n, m ~ t n) => m Bool Source #

getWord8 :: m Word8 Source #

Read a Word8 from the monad state

default getWord8 :: (MonadTrans t, MonadGet n, m ~ t n) => m Word8 Source #

getByteString :: Int -> m ByteString Source #

An efficient get method for strict ByteStrings. Fails if fewer than n bytes are left in the input.

default getByteString :: (MonadTrans t, MonadGet n, m ~ t n) => Int -> m ByteString Source #

getLazyByteString :: Int64 -> m ByteString Source #

An efficient get method for lazy ByteStrings. Does not fail if fewer than n bytes are left in the input.

default getLazyByteString :: (MonadTrans t, MonadGet n, m ~ t n) => Int64 -> m ByteString Source #

getWord16be :: m Word16 Source #

Read a Word16 in big endian format

default getWord16be :: (MonadTrans t, MonadGet n, m ~ t n) => m Word16 Source #

getWord16le :: m Word16 Source #

Read a Word16 in little endian format

default getWord16le :: (MonadTrans t, MonadGet n, m ~ t n) => m Word16 Source #

getWord16host :: m Word16 Source #

O(1). Read a 2 byte Word16 in native host order and host endianness.

default getWord16host :: (MonadTrans t, MonadGet n, m ~ t n) => m Word16 Source #

getWord32be :: m Word32 Source #

Read a Word32 in big endian format

default getWord32be :: (MonadTrans t, MonadGet n, m ~ t n) => m Word32 Source #

getWord32le :: m Word32 Source #

Read a Word32 in little endian format

default getWord32le :: (MonadTrans t, MonadGet n, m ~ t n) => m Word32 Source #

getWord32host :: m Word32 Source #

O(1). Read a Word32 in native host order and host endianness.

default getWord32host :: (MonadTrans t, MonadGet n, m ~ t n) => m Word32 Source #

getWord64be :: m Word64 Source #

Read a Word64 in big endian format

default getWord64be :: (MonadTrans t, MonadGet n, m ~ t n) => m Word64 Source #

getWord64le :: m Word64 Source #

Read a Word64 in little endian format

default getWord64le :: (MonadTrans t, MonadGet n, m ~ t n) => m Word64 Source #

getWord64host :: m Word64 Source #

O(1). Read a Word64 in native host order and host endianness.

default getWord64host :: (MonadTrans t, MonadGet n, m ~ t n) => m Word64 Source #

getWordhost :: m Word Source #

O(1). Read a single native machine word. The word is read in host order, host endian form, for the machine you're on. On a 64 bit machine the Word is an 8 byte value, on a 32 bit machine, 4 bytes.

default getWordhost :: (MonadTrans t, MonadGet n, m ~ t n) => m Word Source #

Instances

Instances details

MonadGet Get Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining Get Source # type Bytes Get Source # Methods skip :: Int -> Get () Source # ensure :: Int -> Get ByteString Source # lookAhead :: Get a -> Get a Source # lookAheadM :: Get (Maybe a) -> Get (Maybe a) Source # lookAheadE :: Get (Either a b) -> Get (Either a b) Source # getBytes :: Int -> Get ByteString Source # remaining :: Get (Remaining Get) Source # isEmpty :: Get Bool Source # getWord8 :: Get Word8 Source # getByteString :: Int -> Get ByteString Source # getLazyByteString :: Int64 -> Get ByteString Source # getWord16be :: Get Word16 Source # getWord16le :: Get Word16 Source # getWord16host :: Get Word16 Source # getWord32be :: Get Word32 Source # getWord32le :: Get Word32 Source # getWord32host :: Get Word32 Source # getWord64be :: Get Word64 Source # getWord64le :: Get Word64 Source # getWord64host :: Get Word64 Source # getWordhost :: Get Word Source #
MonadGet Get Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining Get Source # type Bytes Get Source # Methods skip :: Int -> Get () Source # ensure :: Int -> Get ByteString Source # lookAhead :: Get a -> Get a Source # lookAheadM :: Get (Maybe a) -> Get (Maybe a) Source # lookAheadE :: Get (Either a b) -> Get (Either a b) Source # getBytes :: Int -> Get ByteString Source # remaining :: Get (Remaining Get) Source # isEmpty :: Get Bool Source # getWord8 :: Get Word8 Source # getByteString :: Int -> Get ByteString Source # getLazyByteString :: Int64 -> Get ByteString Source # getWord16be :: Get Word16 Source # getWord16le :: Get Word16 Source # getWord16host :: Get Word16 Source # getWord32be :: Get Word32 Source # getWord32le :: Get Word32 Source # getWord32host :: Get Word32 Source # getWord64be :: Get Word64 Source # getWord64le :: Get Word64 Source # getWord64host :: Get Word64 Source # getWordhost :: Get Word Source #
MonadGet m => MonadGet (ReaderT e m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (ReaderT e m) Source # type Bytes (ReaderT e m) Source # Methods skip :: Int -> ReaderT e m () Source # ensure :: Int -> ReaderT e m ByteString Source # lookAhead :: ReaderT e m a -> ReaderT e m a Source # lookAheadM :: ReaderT e m (Maybe a) -> ReaderT e m (Maybe a) Source # lookAheadE :: ReaderT e m (Either a b) -> ReaderT e m (Either a b) Source # getBytes :: Int -> ReaderT e m ByteString Source # remaining :: ReaderT e m (Remaining (ReaderT e m)) Source # isEmpty :: ReaderT e m Bool Source # getWord8 :: ReaderT e m Word8 Source # getByteString :: Int -> ReaderT e m ByteString Source # getLazyByteString :: Int64 -> ReaderT e m ByteString Source # getWord16be :: ReaderT e m Word16 Source # getWord16le :: ReaderT e m Word16 Source # getWord16host :: ReaderT e m Word16 Source # getWord32be :: ReaderT e m Word32 Source # getWord32le :: ReaderT e m Word32 Source # getWord32host :: ReaderT e m Word32 Source # getWord64be :: ReaderT e m Word64 Source # getWord64le :: ReaderT e m Word64 Source # getWord64host :: ReaderT e m Word64 Source # getWordhost :: ReaderT e m Word Source #
MonadGet m => MonadGet (ExceptT e m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (ExceptT e m) Source # type Bytes (ExceptT e m) Source # Methods skip :: Int -> ExceptT e m () Source # ensure :: Int -> ExceptT e m ByteString Source # lookAhead :: ExceptT e m a -> ExceptT e m a Source # lookAheadM :: ExceptT e m (Maybe a) -> ExceptT e m (Maybe a) Source # lookAheadE :: ExceptT e m (Either a b) -> ExceptT e m (Either a b) Source # getBytes :: Int -> ExceptT e m ByteString Source # remaining :: ExceptT e m (Remaining (ExceptT e m)) Source # isEmpty :: ExceptT e m Bool Source # getWord8 :: ExceptT e m Word8 Source # getByteString :: Int -> ExceptT e m ByteString Source # getLazyByteString :: Int64 -> ExceptT e m ByteString Source # getWord16be :: ExceptT e m Word16 Source # getWord16le :: ExceptT e m Word16 Source # getWord16host :: ExceptT e m Word16 Source # getWord32be :: ExceptT e m Word32 Source # getWord32le :: ExceptT e m Word32 Source # getWord32host :: ExceptT e m Word32 Source # getWord64be :: ExceptT e m Word64 Source # getWord64le :: ExceptT e m Word64 Source # getWord64host :: ExceptT e m Word64 Source # getWordhost :: ExceptT e m Word Source #
MonadGet m => MonadGet (StateT s m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (StateT s m) Source # type Bytes (StateT s m) Source # Methods skip :: Int -> StateT s m () Source # ensure :: Int -> StateT s m ByteString Source # lookAhead :: StateT s m a -> StateT s m a Source # lookAheadM :: StateT s m (Maybe a) -> StateT s m (Maybe a) Source # lookAheadE :: StateT s m (Either a b) -> StateT s m (Either a b) Source # getBytes :: Int -> StateT s m ByteString Source # remaining :: StateT s m (Remaining (StateT s m)) Source # isEmpty :: StateT s m Bool Source # getWord8 :: StateT s m Word8 Source # getByteString :: Int -> StateT s m ByteString Source # getLazyByteString :: Int64 -> StateT s m ByteString Source # getWord16be :: StateT s m Word16 Source # getWord16le :: StateT s m Word16 Source # getWord16host :: StateT s m Word16 Source # getWord32be :: StateT s m Word32 Source # getWord32le :: StateT s m Word32 Source # getWord32host :: StateT s m Word32 Source # getWord64be :: StateT s m Word64 Source # getWord64le :: StateT s m Word64 Source # getWord64host :: StateT s m Word64 Source # getWordhost :: StateT s m Word Source #
MonadGet m => MonadGet (StateT s m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (StateT s m) Source # type Bytes (StateT s m) Source # Methods skip :: Int -> StateT s m () Source # ensure :: Int -> StateT s m ByteString Source # lookAhead :: StateT s m a -> StateT s m a Source # lookAheadM :: StateT s m (Maybe a) -> StateT s m (Maybe a) Source # lookAheadE :: StateT s m (Either a b) -> StateT s m (Either a b) Source # getBytes :: Int -> StateT s m ByteString Source # remaining :: StateT s m (Remaining (StateT s m)) Source # isEmpty :: StateT s m Bool Source # getWord8 :: StateT s m Word8 Source # getByteString :: Int -> StateT s m ByteString Source # getLazyByteString :: Int64 -> StateT s m ByteString Source # getWord16be :: StateT s m Word16 Source # getWord16le :: StateT s m Word16 Source # getWord16host :: StateT s m Word16 Source # getWord32be :: StateT s m Word32 Source # getWord32le :: StateT s m Word32 Source # getWord32host :: StateT s m Word32 Source # getWord64be :: StateT s m Word64 Source # getWord64le :: StateT s m Word64 Source # getWord64host :: StateT s m Word64 Source # getWordhost :: StateT s m Word Source #
(MonadGet m, Monoid w) => MonadGet (WriterT w m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (WriterT w m) Source # type Bytes (WriterT w m) Source # Methods skip :: Int -> WriterT w m () Source # ensure :: Int -> WriterT w m ByteString Source # lookAhead :: WriterT w m a -> WriterT w m a Source # lookAheadM :: WriterT w m (Maybe a) -> WriterT w m (Maybe a) Source # lookAheadE :: WriterT w m (Either a b) -> WriterT w m (Either a b) Source # getBytes :: Int -> WriterT w m ByteString Source # remaining :: WriterT w m (Remaining (WriterT w m)) Source # isEmpty :: WriterT w m Bool Source # getWord8 :: WriterT w m Word8 Source # getByteString :: Int -> WriterT w m ByteString Source # getLazyByteString :: Int64 -> WriterT w m ByteString Source # getWord16be :: WriterT w m Word16 Source # getWord16le :: WriterT w m Word16 Source # getWord16host :: WriterT w m Word16 Source # getWord32be :: WriterT w m Word32 Source # getWord32le :: WriterT w m Word32 Source # getWord32host :: WriterT w m Word32 Source # getWord64be :: WriterT w m Word64 Source # getWord64le :: WriterT w m Word64 Source # getWord64host :: WriterT w m Word64 Source # getWordhost :: WriterT w m Word Source #
(MonadGet m, Monoid w) => MonadGet (WriterT w m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (WriterT w m) Source # type Bytes (WriterT w m) Source # Methods skip :: Int -> WriterT w m () Source # ensure :: Int -> WriterT w m ByteString Source # lookAhead :: WriterT w m a -> WriterT w m a Source # lookAheadM :: WriterT w m (Maybe a) -> WriterT w m (Maybe a) Source # lookAheadE :: WriterT w m (Either a b) -> WriterT w m (Either a b) Source # getBytes :: Int -> WriterT w m ByteString Source # remaining :: WriterT w m (Remaining (WriterT w m)) Source # isEmpty :: WriterT w m Bool Source # getWord8 :: WriterT w m Word8 Source # getByteString :: Int -> WriterT w m ByteString Source # getLazyByteString :: Int64 -> WriterT w m ByteString Source # getWord16be :: WriterT w m Word16 Source # getWord16le :: WriterT w m Word16 Source # getWord16host :: WriterT w m Word16 Source # getWord32be :: WriterT w m Word32 Source # getWord32le :: WriterT w m Word32 Source # getWord32host :: WriterT w m Word32 Source # getWord64be :: WriterT w m Word64 Source # getWord64le :: WriterT w m Word64 Source # getWord64host :: WriterT w m Word64 Source # getWordhost :: WriterT w m Word Source #
(MonadGet m, Monoid w) => MonadGet (RWST r w s m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (RWST r w s m) Source # type Bytes (RWST r w s m) Source # Methods skip :: Int -> RWST r w s m () Source # ensure :: Int -> RWST r w s m ByteString Source # lookAhead :: RWST r w s m a -> RWST r w s m a Source # lookAheadM :: RWST r w s m (Maybe a) -> RWST r w s m (Maybe a) Source # lookAheadE :: RWST r w s m (Either a b) -> RWST r w s m (Either a b) Source # getBytes :: Int -> RWST r w s m ByteString Source # remaining :: RWST r w s m (Remaining (RWST r w s m)) Source # isEmpty :: RWST r w s m Bool Source # getWord8 :: RWST r w s m Word8 Source # getByteString :: Int -> RWST r w s m ByteString Source # getLazyByteString :: Int64 -> RWST r w s m ByteString Source # getWord16be :: RWST r w s m Word16 Source # getWord16le :: RWST r w s m Word16 Source # getWord16host :: RWST r w s m Word16 Source # getWord32be :: RWST r w s m Word32 Source # getWord32le :: RWST r w s m Word32 Source # getWord32host :: RWST r w s m Word32 Source # getWord64be :: RWST r w s m Word64 Source # getWord64le :: RWST r w s m Word64 Source # getWord64host :: RWST r w s m Word64 Source # getWordhost :: RWST r w s m Word Source #
(MonadGet m, Monoid w) => MonadGet (RWST r w s m) Source #
Instance details Defined in Data.Bytes.Get Associated Types type Remaining (RWST r w s m) Source # type Bytes (RWST r w s m) Source # Methods skip :: Int -> RWST r w s m () Source # ensure :: Int -> RWST r w s m ByteString Source # lookAhead :: RWST r w s m a -> RWST r w s m a Source # lookAheadM :: RWST r w s m (Maybe a) -> RWST r w s m (Maybe a) Source # lookAheadE :: RWST r w s m (Either a b) -> RWST r w s m (Either a b) Source # getBytes :: Int -> RWST r w s m ByteString Source # remaining :: RWST r w s m (Remaining (RWST r w s m)) Source # isEmpty :: RWST r w s m Bool Source # getWord8 :: RWST r w s m Word8 Source # getByteString :: Int -> RWST r w s m ByteString Source # getLazyByteString :: Int64 -> RWST r w s m ByteString Source # getWord16be :: RWST r w s m Word16 Source # getWord16le :: RWST r w s m Word16 Source # getWord16host :: RWST r w s m Word16 Source # getWord32be :: RWST r w s m Word32 Source # getWord32le :: RWST r w s m Word32 Source # getWord32host :: RWST r w s m Word32 Source # getWord64be :: RWST r w s m Word64 Source # getWord64le :: RWST r w s m Word64 Source # getWord64host :: RWST r w s m Word64 Source # getWordhost :: RWST r w s m Word Source #

runGetL :: Get a -> ByteString -> a Source #

Get something from a lazy ByteString using runGet.

runGetS :: Get a -> ByteString -> Either String a Source #

Get something from a strict ByteString using runGet.