885974be99
All properties changed to use them, except for prop_encode_c_decode_c_roundtrip, which already filtered to ascii for other reasons. A few modules had to be split out, because Setup does not build-depend on QuickCheck.
49 lines
1.4 KiB
Haskell
49 lines
1.4 KiB
Haskell
{- Some git commands output encoded filenames, in a rather annoyingly complex
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- C-style encoding.
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-
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- Copyright 2010, 2011 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Git.Filename where
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import Common
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import Utility.Format (decode_c, encode_c)
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import Utility.QuickCheck
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import Data.Char
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import Data.Word
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import qualified Data.ByteString as S
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-- encoded filenames will be inside double quotes
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decode :: S.ByteString -> RawFilePath
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decode b = case S.uncons b of
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Nothing -> b
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Just (h, t)
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| h /= q -> b
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| otherwise -> case S.unsnoc t of
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Nothing -> b
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Just (i, l)
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| l /= q -> b
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| otherwise ->
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encodeBS $ decode_c $ decodeBS i
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where
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q :: Word8
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q = fromIntegral (ord '"')
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{- Should not need to use this, except for testing decode. -}
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encode :: RawFilePath -> S.ByteString
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encode s = encodeBS $ "\"" ++ encode_c (decodeBS s) ++ "\""
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-- Encoding and then decoding roundtrips only when the string does not
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-- contain high unicode, because eg, both "\12345" and "\227\128\185"
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-- are encoded to "\343\200\271".
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--
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-- That is not a real-world problem, and using TestableFilePath
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-- limits what's tested to ascii, so avoids running into it.
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prop_encode_decode_roundtrip :: TestableFilePath -> Bool
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prop_encode_decode_roundtrip ts =
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s == fromRawFilePath (decode (encode (toRawFilePath s)))
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where
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s = fromTestableFilePath ts
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