Darcs.Util.Hash

Documentation

data Hash

Constructors

SHA256 !ByteString

SHA1 !ByteString

NoHash

Instances

Eq Hash

Methods

(==) :: Hash -> Hash -> Bool

(/=) :: Hash -> Hash -> Bool

Data Hash

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Hash -> c Hash

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Hash

toConstr :: Hash -> Constr

dataTypeOf :: Hash -> DataType

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c Hash)

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Hash)

gmapT :: (forall b. Data b => b -> b) -> Hash -> Hash

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Hash -> r

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Hash -> r

gmapQ :: (forall d. Data d => d -> u) -> Hash -> [u]

gmapQi :: Int -> (forall d. Data d => d -> u) -> Hash -> u

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Hash -> m Hash

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Hash -> m Hash

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Hash -> m Hash

Ord Hash

Methods

compare :: Hash -> Hash -> Ordering

(<) :: Hash -> Hash -> Bool

(<=) :: Hash -> Hash -> Bool

(>) :: Hash -> Hash -> Bool

(>=) :: Hash -> Hash -> Bool

max :: Hash -> Hash -> Hash

min :: Hash -> Hash -> Hash

Read Hash

Methods

readsPrec :: Int -> ReadS Hash

readList :: ReadS [Hash]

readPrec :: ReadPrec Hash

readListPrec :: ReadPrec [Hash]

Show Hash

Methods

showsPrec :: Int -> Hash -> ShowS

show :: Hash -> String

showList :: [Hash] -> ShowS

encodeBase16 :: Hash -> ByteString

Produce a base16 (ascii-hex) encoded string from a hash. This can be turned back into a Hash (see "decodeBase16". This is a loss-less process.

decodeBase16 :: ByteString -> Hash

Take a base16-encoded string and decode it as a Hash. If the string is malformed, yields NoHash.

sha256 :: ByteString -> Hash

Compute a sha256 of a (lazy) ByteString. However, although this works correctly for any bytestring, it is only efficient if the bytestring only has a sigle chunk.

rawHash :: Hash -> ByteString

match :: Hash -> Hash -> Bool