From: Ramakrishnan Muthukrishnan <ram@rkrishnan.org>
Date: Thu, 12 Feb 2015 12:12:21 +0000 (+0530)
Subject: encode with tests
X-Git-Url: https://git.rkrishnan.org/components/com_hotproperty/nxhtml.html?a=commitdiff_plain;h=c20696b82bd144f85c363a11d64a3aaea5844f2f;p=functorrent.git

encode with tests
---

diff --git a/src/Bencode.hs b/src/Bencode.hs
index 62627a6..16e4a2b 100644
--- a/src/Bencode.hs
+++ b/src/Bencode.hs
@@ -121,7 +121,18 @@ decode = parse bencVal "BVal"
 -- "i0e"
 -- >>> encode (Bint 42)
 -- "i42e"
+-- >>> encode (Blist [(Bstr (BC.pack "spam")), (Bstr (BC.pack "eggs"))])
+-- "l4:spam4:eggse"
+-- >>> encode (Blist [])
+-- "le"
+-- >>> encode (Bdict (M.fromList [(Bstr $ BC.pack "spam", Bstr $ BC.pack "eggs")]))
+-- "d4:spam4:eggse"
 encode :: BVal -> String
 encode (Bstr bs) = let s = BC.unpack bs
                    in show (length s) ++ ":" ++ s
 encode (Bint i) = "i" ++ show i ++ "e"
+encode (Blist xs) = "l" ++ encodeList xs ++ "e"
+  where encodeList [] = ""
+        encodeList (x:xs) = encode x ++ encodeList xs
+encode (Bdict d) = "d" ++ encodeDict d ++ "e"
+  where encodeDict m = concat [encode k ++ encode (m M.! k) | k <- M.keys m]