darcs-2.12.5: a distributed, interactive, smart revision control system

Safe Haskell | None
Language | Haskell2010

Darcs.Util.Hash

Synopsis

- data Hash
  - = SHA256 !ByteString
  - | SHA1 !ByteString
  - | NoHash
- encodeBase16 :: Hash -> ByteString
- decodeBase16 :: ByteString -> Hash
- sha256 :: ByteString -> Hash
- rawHash :: Hash -> ByteString
- match :: Hash -> Hash -> Bool

# 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 #