Safe Haskell	None
Language	Haskell2010

Darcs.Util.Hash

Synopsis

data Hash
- = SHA256 !ByteString
- | NoHash
encodeBase16 :: Hash -> ByteString
decodeBase16 :: ByteString -> Hash
sha256 :: ByteString -> Hash
sha256sum :: ByteString -> String
rawHash :: Hash -> ByteString
match :: Hash -> Hash -> Bool
sha1PS :: ByteString -> SHA1
data SHA1 = SHA1 !Word32 !Word32 !Word32 !Word32 !Word32
showAsHex :: Word32 -> String
sha1Xor :: SHA1 -> SHA1 -> SHA1
sha1zero :: SHA1
sha1short :: SHA1 -> Word32
sha1Show :: SHA1 -> ByteString
sha1Read :: ByteString -> Maybe SHA1

Documentation

data Hash Source #

Constructors

SHA256 !ByteString
NoHash

Instances

Eq Hash Source #
Instance details Defined in Darcs.Util.Hash Methods (==) :: Hash -> Hash -> Bool # (/=) :: Hash -> Hash -> Bool #
Ord Hash Source #
Instance details Defined in Darcs.Util.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 Source #
Instance details Defined in Darcs.Util.Hash Methods readsPrec :: Int -> ReadS Hash # readList :: ReadS [Hash] # readPrec :: ReadPrec Hash # readListPrec :: ReadPrec [Hash] #
Show Hash Source #
Instance details Defined in Darcs.Util.Hash Methods showsPrec :: Int -> Hash -> ShowS # show :: Hash -> String # showList :: [Hash] -> ShowS #

encodeBase16 :: Hash -> ByteString Source #

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 Source #

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

sha256 :: ByteString -> Hash Source #

Compute a sha256 of a (lazy) ByteString.

sha256sum :: ByteString -> String Source #

Same as previous but general purpose.

rawHash :: Hash -> ByteString Source #

match :: Hash -> Hash -> Bool Source #

sha1PS :: ByteString -> SHA1 Source #

data SHA1 Source #

Constructors

SHA1 !Word32 !Word32 !Word32 !Word32 !Word32

Instances

Eq SHA1 Source #
Instance details Defined in Darcs.Util.Hash Methods (==) :: SHA1 -> SHA1 -> Bool # (/=) :: SHA1 -> SHA1 -> Bool #
Ord SHA1 Source #
Instance details Defined in Darcs.Util.Hash Methods compare :: SHA1 -> SHA1 -> Ordering # (<) :: SHA1 -> SHA1 -> Bool # (<=) :: SHA1 -> SHA1 -> Bool # (>) :: SHA1 -> SHA1 -> Bool # (>=) :: SHA1 -> SHA1 -> Bool # max :: SHA1 -> SHA1 -> SHA1 # min :: SHA1 -> SHA1 -> SHA1 #
Show SHA1 Source #
Instance details Defined in Darcs.Util.Hash Methods showsPrec :: Int -> SHA1 -> ShowS # show :: SHA1 -> String # showList :: [SHA1] -> ShowS #
Binary SHA1 Source #
Instance details Defined in Darcs.Util.Hash Methods put :: SHA1 -> Put # get :: Get SHA1 # putList :: [SHA1] -> Put #

showAsHex :: Word32 -> String Source #

sha1Xor :: SHA1 -> SHA1 -> SHA1 Source #

sha1zero :: SHA1 Source #

sha1short :: SHA1 -> Word32 Source #

sha1Show :: SHA1 -> ByteString Source #

sha1Read :: ByteString -> Maybe SHA1 Source #

Parse a SHA1 directly from its B16 encoding, given as a ByteString, or return Nothing. The implementation is quite low-level and optimized because the current implementation of RepoPatchV3 has to read lots of SHA1 hashes, and profiling showed that this is a bottleneck.