From ee58401f82494ea48216e77edf2d80b8741336c1 Mon Sep 17 00:00:00 2001
From: Joe Crayne <joe@jerkface.net>
Date: Sun, 28 Oct 2018 20:46:20 -0400
Subject: Modified testdiff.

---
 haskell/examples/testdiff.hs | 52 ++++++++++++++++----------------------------
 1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/haskell/examples/testdiff.hs b/haskell/examples/testdiff.hs
index 3f6e3e2..c821bfa 100644
--- a/haskell/examples/testdiff.hs
+++ b/haskell/examples/testdiff.hs
@@ -7,45 +7,31 @@ import Text.XXD
 source :: L.ByteString
 source = "It could be said that Joe was here. I don't know what to do about it."
 
-patched :: L.ByteString
-patched = "It could be said that Joe, the magnificent, was here.  I don't know what to do about it."
-
-source2 :: L.ByteString
-source2 = "It could be said that Joe was absolutely 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 patched
+delta = computeDiff defaultConfig { flags = XD3_ADLER32 } source target
 
 delta2 :: Result VCDIFF
-delta2 = computeDiff defaultConfig { flags = XD3_ADLER32 } source patched
+delta2 = computeDiff defaultConfig { flags = XD3_ADLER32 } source target
+
+dump title bs kont = do
+    putStrLn title
+    mapM_ putStrLn $ xxd2 0 (L.toStrict bs)
+    kont
 
 main = do
-    putStrLn "source"
-    mapM_ putStrLn $ xxd2 0 (L.toStrict source)
-    putStrLn ""
-    putStrLn "target"
-    mapM_ putStrLn $ xxd2 0 (L.toStrict patched)
-    putStrLn ""
-    case delta2 of
-        Result δ me -> do
-            let d = encodeVCDIFF δ
-            putStrLn "diff(XD3_ADLER32)"
-            mapM_ putStrLn $ xxd2 0 (L.toStrict d)
-            print me
-            putStrLn ""
-            let Result patched' pe = applyPatch defaultConfig source2 δ
-            putStrLn "patched(XD3_ADLER32)"
-            mapM_ putStrLn $ xxd2 0 (L.toStrict patched') -- $ L.take 48 patched')
-            print pe
+    dump "source" source $ putStrLn ""
+    dump "target" target $ putStrLn ""
+    go "XD3_ADLER32" delta
+    go "XD3_ADLER32" delta2
+
+go flgs delta = do
     putStrLn ""
     case delta of
         Result δ me -> do
-            let d = encodeVCDIFF δ
-            putStrLn "diff(default)"
-            mapM_ putStrLn $ xxd2 0 (L.toStrict d)
-            print me
-            putStrLn ""
-            putStrLn "patched(default)"
-            let Result patched' pe = applyPatch defaultConfig source2 δ
-            mapM_ putStrLn $ xxd2 0 (L.toStrict patched') -- $ L.take 48 patched')
-            print pe
+            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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