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{-# LANGUAGE OverloadedStrings #-}
import qualified Data.ByteString.Lazy as L
import Data.VCDIFF
import Text.XXD
source :: L.ByteString
source = "It could be said that Joe was here. I don't know what to do about it."
source2 :: L.ByteString
source2 = "It could be said that Joe was not here. I don't know what to do about it."
target :: L.ByteString
target = "It could be said that Joe, the magnificent, was here. I don't know what to do about it."
delta :: Result VCDIFF
delta = computeDiff defaultConfig source target
delta2 :: Result VCDIFF
delta2 = computeDiff defaultConfig source target
delta3 :: Result VCDIFF
delta3 = computeDiff defaultConfig { flags = XD3_ADLER32 } source target
delta4 :: Result VCDIFF
delta4 = computeDiff defaultConfig { flags = XD3_ADLER32 } source target
delta5 :: Result VCDIFF
delta5 = computeDiff defaultConfig { flags = XD3_ADLER32 } source target
dump title bs kont = do
putStrLn title
mapM_ putStrLn $ xxd2 0 (L.toStrict bs)
kont
main = do
dump "source" source $ putStrLn ""
dump "target" target $ putStrLn ""
go source "XD3_ADLER32" delta3
go source "XD3_ADLER32" delta4
go source "XD3_ADLER32" delta5
go source "default" delta
go source "default" delta2
{-
go source2 "default" delta
go source2 "default" delta2
go source2 "XD3_ADLER32" delta3
go source2 "XD3_ADLER32" delta4
-}
print source
print source2
print target
go source flgs delta = do
putStrLn ""
case delta of
Result δ me -> do
let dif = encodeVCDIFF δ
dump ("diff("++flgs++ ")") dif $ print me >> putStrLn ""
let Result patched pe = applyPatch defaultConfig source δ
dump ("patched("++flgs++")") patched $ print pe
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