Copyright	(c) Don Stewart 2006-2008 (c) Duncan Coutts 2006-2011
License	BSD-style
Maintainer	dons00@gmail.com, duncan@community.haskell.org
Stability	unstable
Portability	non-portable
Safe Haskell	Unsafe
Language	Haskell98

Data.ByteString.Lazy.Internal

Contents

The lazy ByteString type and representation
Data type invariant and abstraction function
Chunk allocation sizes
Conversion with lists: packing and unpacking

Description

A module containing semi-public ByteString internals. This exposes the ByteString representation and low level construction functions. Modules which extend the ByteString system will need to use this module while ideally most users will be able to make do with the public interface modules.

Synopsis

data ByteString
- = Empty
- | Chunk !ByteString ByteString
chunk :: ByteString -> ByteString -> ByteString
foldrChunks :: (ByteString -> a -> a) -> a -> ByteString -> a
foldlChunks :: (a -> ByteString -> a) -> a -> ByteString -> a
invariant :: ByteString -> Bool
checkInvariant :: ByteString -> ByteString
defaultChunkSize :: Int
smallChunkSize :: Int
chunkOverhead :: Int
packBytes :: [Word8] -> ByteString
packChars :: [Char] -> ByteString
unpackBytes :: ByteString -> [Word8]
unpackChars :: ByteString -> [Char]

The lazy `ByteString` type and representation

data ByteString Source #

A space-efficient representation of a Word8 vector, supporting many efficient operations.

A lazy ByteString contains 8-bit bytes, or by using the operations from Data.ByteString.Lazy.Char8 it can be interpreted as containing 8-bit characters.

Constructors

Empty
Chunk !ByteString ByteString

Instances

Instances details

Data ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> ByteString -> c ByteString Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c ByteString Source # toConstr :: ByteString -> Constr Source # dataTypeOf :: ByteString -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c ByteString) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c ByteString) Source # gmapT :: (forall b. Data b => b -> b) -> ByteString -> ByteString Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> ByteString -> r Source # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> ByteString -> r Source # gmapQ :: (forall d. Data d => d -> u) -> ByteString -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> ByteString -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> ByteString -> m ByteString Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> ByteString -> m ByteString Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> ByteString -> m ByteString Source #
IsString ByteString #	Beware: `fromString` truncates multi-byte characters to octets. e.g. "枯朶に烏のとまりけり秋の暮" becomes �6k�nh~�Q��n�
Instance details Defined in Data.ByteString.Lazy.Internal Methods fromString :: String -> ByteString Source #
Monoid ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods mempty :: ByteString Source # mappend :: ByteString -> ByteString -> ByteString Source # mconcat :: [ByteString] -> ByteString Source #
Semigroup ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods (<>) :: ByteString -> ByteString -> ByteString Source # sconcat :: NonEmpty ByteString -> ByteString Source # stimes :: Integral b => b -> ByteString -> ByteString Source #
IsList ByteString #	Since: bytestring-0.10.12.0
Instance details Defined in Data.ByteString.Lazy.Internal Associated Types type Item ByteString Source # Methods fromList :: [Item ByteString] -> ByteString Source # fromListN :: Int -> [Item ByteString] -> ByteString Source # toList :: ByteString -> [Item ByteString] Source #
Read ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods readsPrec :: Int -> ReadS ByteString Source # readList :: ReadS [ByteString] Source # readPrec :: ReadPrec ByteString Source # readListPrec :: ReadPrec [ByteString] Source #
Show ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods showsPrec :: Int -> ByteString -> ShowS Source # show :: ByteString -> String Source # showList :: [ByteString] -> ShowS Source #
NFData ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods rnf :: ByteString -> () Source #
Eq ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods (==) :: ByteString -> ByteString -> Bool Source # (/=) :: ByteString -> ByteString -> Bool Source #
Ord ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal Methods compare :: ByteString -> ByteString -> Ordering Source # (<) :: ByteString -> ByteString -> Bool Source # (<=) :: ByteString -> ByteString -> Bool Source # (>) :: ByteString -> ByteString -> Bool Source # (>=) :: ByteString -> ByteString -> Bool Source # max :: ByteString -> ByteString -> ByteString Source # min :: ByteString -> ByteString -> ByteString Source #
type Item ByteString #
Instance details Defined in Data.ByteString.Lazy.Internal type Item ByteString = Word8

chunk :: ByteString -> ByteString -> ByteString Source #

Smart constructor for Chunk. Guarantees the data type invariant.

foldrChunks :: (ByteString -> a -> a) -> a -> ByteString -> a Source #

Consume the chunks of a lazy ByteString with a natural right fold.

foldlChunks :: (a -> ByteString -> a) -> a -> ByteString -> a Source #

Consume the chunks of a lazy ByteString with a strict, tail-recursive, accumulating left fold.

Data type invariant and abstraction function

invariant :: ByteString -> Bool Source #

The data type invariant: Every ByteString is either Empty or consists of non-null ByteStrings. All functions must preserve this, and the QC properties must check this.

checkInvariant :: ByteString -> ByteString Source #

In a form that checks the invariant lazily.