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49 lines
1.4 KiB
Haskell
49 lines
1.4 KiB
Haskell
{- This file is part of Vervis.
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-
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- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
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-
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- The author(s) have dedicated all copyright and related and neighboring
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- rights to this software to the public domain worldwide. This software is
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- distributed without any warranty.
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-
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- You should have received a copy of the CC0 Public Domain Dedication along
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- with this software. If not, see
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- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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module Darcs.Local.Hash.Codec
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( encodePatchHash
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, encodeInventoryHash
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)
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where
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import Prelude
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import Data.ByteString (ByteString)
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import Data.Monoid ((<>))
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import qualified Data.ByteString as B (length, replicate)
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import qualified Data.ByteString.Base16 as B16 (encode)
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import qualified Data.ByteString.Lex.Integral as BX (packDecimal)
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import Darcs.Local.Hash.Types
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encodeHash :: ByteString -> ByteString
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encodeHash = B16.encode
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encodeSize :: Int -> ByteString
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encodeSize n =
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case BX.packDecimal n of
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Nothing -> error "negative size in sizehash"
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Just b ->
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if B.length b < 10
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then B.replicate (10 - B.length b) 0x30 <> b
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else b
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encodePatchHash :: PatchHash -> ByteString
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encodePatchHash (PatchHash h) = encodeHash h
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encodeInventoryHash :: InventoryHash -> ByteString
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encodeInventoryHash (InventoryHash s h) = encodeSize s <> "-" <> encodeHash h
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