--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netserver/Codec/Binary/Base64.hs	Sun Jan 25 13:48:41 2009 +0000
@@ -0,0 +1,113 @@
+-- |
+-- Module    : Codec.Binary.Base64
+-- Copyright : (c) 2007 Magnus Therning
+-- License   : BSD3
+--
+-- Implemented as specified in RFC 4648
+-- (<http://tools.ietf.org/html/rfc4648>).
+--
+-- Further documentation and information can be found at
+-- <http://www.haskell.org/haskellwiki/Library/Data_encoding>.
+module Codec.Binary.Base64
+    ( encode
+    , decode
+    , decode'
+    , chop
+    , unchop
+    ) where
+
+import Control.Monad
+import Data.Array
+import Data.Bits
+import Data.Maybe
+import Data.Word
+import qualified Data.Map as M
+
+-- {{{1 enc/dec map
+_encMap =
+    [ (0, 'A'), (1, 'B'), (2, 'C'), (3, 'D'), (4, 'E')
+    , (5, 'F') , (6, 'G'), (7, 'H'), (8, 'I'), (9, 'J')
+    , (10, 'K'), (11, 'L'), (12, 'M'), (13, 'N'), (14, 'O')
+    , (15, 'P'), (16, 'Q'), (17, 'R'), (18, 'S'), (19, 'T')
+    , (20, 'U'), (21, 'V'), (22, 'W'), (23, 'X'), (24, 'Y')
+    , (25, 'Z'), (26, 'a'), (27, 'b'), (28, 'c'), (29, 'd')
+    , (30, 'e'), (31, 'f'), (32, 'g'), (33, 'h'), (34, 'i')
+    , (35, 'j'), (36, 'k'), (37, 'l'), (38, 'm'), (39, 'n')
+    , (40, 'o'), (41, 'p'), (42, 'q'), (43, 'r'), (44, 's')
+    , (45, 't'), (46, 'u'), (47, 'v'), (48, 'w'), (49, 'x')
+    , (50, 'y'), (51, 'z'), (52, '0'), (53, '1'), (54, '2')
+    , (55, '3'), (56, '4'), (57, '5'), (58, '6'), (59, '7')
+    , (60, '8'), (61, '9'), (62, '+'), (63, '/') ]
+
+-- {{{1 encodeArray
+encodeArray :: Array Word8 Char
+encodeArray = array (0, 64) _encMap
+
+-- {{{1 decodeMap
+decodeMap :: M.Map Char Word8
+decodeMap  = M.fromList [(snd i, fst i) | i <- _encMap]
+
+-- {{{1 encode
+-- | Encode data.
+encode :: [Word8]
+    -> String
+encode = let
+        pad n = take n $ repeat 0
+        enc [] = ""
+        enc l@[o] = (++ "==") . take 2 .enc $ l ++ pad 2
+        enc l@[o1, o2] = (++ "=") . take 3 . enc $ l ++ pad 1
+        enc (o1:o2:o3:os) = let
+                i1 = o1 `shiftR` 2
+                i2 = (o1 `shiftL` 4 .|. o2 `shiftR` 4) .&. 0x3f
+                i3 = (o2 `shiftL` 2 .|. o3 `shiftR` 6) .&. 0x3f
+                i4 = o3 .&. 0x3f
+            in (foldr (\ i s -> (encodeArray ! i) : s) "" [i1, i2, i3, i4]) ++ enc os
+    in enc
+
+-- {{{1 decode
+-- | Decode data (lazy).
+decode' :: String
+    -> [Maybe Word8]
+decode' = let
+        pad n = take n $ repeat $ Just 0
+        dec [] = []
+        dec l@[Just eo1, Just eo2] = take 1 . dec $ l ++ pad 2
+        dec l@[Just eo1, Just eo2, Just eo3] = take 2 . dec $ l ++ pad 1
+        dec (Just eo1:Just eo2:Just eo3:Just eo4:eos) = let
+                o1 = eo1 `shiftL` 2 .|. eo2 `shiftR` 4
+                o2 = eo2 `shiftL` 4 .|. eo3 `shiftR` 2
+                o3 = eo3 `shiftL` 6 .|. eo4
+            in Just o1:Just o2:Just o3:(dec eos)
+        dec _ = [Nothing]
+    in
+        dec . map (flip M.lookup decodeMap) . takeWhile (/= '=')
+
+-- | Decode data (strict).
+decode :: String
+    -> Maybe [Word8]
+decode = sequence . decode'
+
+-- {{{1 chop
+-- | Chop up a string in parts.
+--
+--   The length given is rounded down to the nearest multiple of 4.
+--
+--   /Notes:/
+--
+--   * PEM requires lines that are 64 characters long.
+--
+--   * MIME requires lines that are at most 76 characters long.
+chop :: Int     -- ^ length of individual lines
+    -> String
+    -> [String]
+chop n "" = []
+chop n s = let
+        enc_len | n < 4 = 4
+                | otherwise = n `div` 4 * 4
+    in (take enc_len s) : chop n (drop enc_len s)
+
+-- {{{1 unchop
+-- | Concatenate the strings into one long string.
+unchop :: [String]
+    -> String
+unchop = foldr (++) ""

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netserver/Codec/Binary/UTF8/String.hs	Sun Jan 25 13:48:41 2009 +0000
@@ -0,0 +1,97 @@
+--
+-- |
+-- Module      :  Codec.Binary.UTF8.String
+-- Copyright   :  (c) Eric Mertens 2007
+-- License     :  BSD3-style (see LICENSE)
+-- 
+-- Maintainer:    emertens@galois.com
+-- Stability   :  experimental
+-- Portability :  portable
+--
+-- Support for encoding UTF8 Strings to and from @[Word8]@
+--
+
+module Codec.Binary.UTF8.String (
+      encode
+    , decode
+    , encodeString
+    , decodeString
+  ) where
+
+import Data.Word        (Word8)
+import Data.Bits        ((.|.),(.&.),shiftL,shiftR)
+import Data.Char        (chr,ord)
+
+default(Int)
+
+-- | Encode a string using 'encode' and store the result in a 'String'.
+encodeString :: String -> String
+encodeString xs = map (toEnum . fromEnum) (encode xs)
+
+-- | Decode a string using 'decode' using a 'String' as input.
+-- | This is not safe but it is necessary if UTF-8 encoded text
+-- | has been loaded into a 'String' prior to being decoded.
+decodeString :: String -> String
+decodeString xs = decode (map (toEnum . fromEnum) xs)
+
+replacement_character :: Char
+replacement_character = '\xfffd'
+
+-- | Encode a Haskell String to a list of Word8 values, in UTF8 format.
+encode :: String -> [Word8]
+encode = concatMap (map fromIntegral . go . ord)
+ where
+  go oc
+   | oc <= 0x7f       = [oc]
+
+   | oc <= 0x7ff      = [ 0xc0 + (oc `shiftR` 6)
+                        , 0x80 + oc .&. 0x3f
+                        ]
+
+   | oc <= 0xffff     = [ 0xe0 + (oc `shiftR` 12)
+                        , 0x80 + ((oc `shiftR` 6) .&. 0x3f)
+                        , 0x80 + oc .&. 0x3f
+                        ]
+   | otherwise        = [ 0xf0 + (oc `shiftR` 18)
+                        , 0x80 + ((oc `shiftR` 12) .&. 0x3f)
+                        , 0x80 + ((oc `shiftR` 6) .&. 0x3f)
+                        , 0x80 + oc .&. 0x3f
+                        ]
+
+--
+-- | Decode a UTF8 string packed into a list of Word8 values, directly to String
+--
+decode :: [Word8] -> String
+decode [    ] = ""
+decode (c:cs)
+  | c < 0x80  = chr (fromEnum c) : decode cs
+  | c < 0xc0  = replacement_character : decode cs
+  | c < 0xe0  = multi1
+  | c < 0xf0  = multi_byte 2 0xf  0x800
+  | c < 0xf8  = multi_byte 3 0x7  0x10000
+  | c < 0xfc  = multi_byte 4 0x3  0x200000
+  | c < 0xfe  = multi_byte 5 0x1  0x4000000
+  | otherwise = replacement_character : decode cs
+  where
+    multi1 = case cs of
+      c1 : ds | c1 .&. 0xc0 == 0x80 ->
+        let d = ((fromEnum c .&. 0x1f) `shiftL` 6) .|.  fromEnum (c1 .&. 0x3f)
+        in if d >= 0x000080 then toEnum d : decode ds
+                            else replacement_character : decode ds
+      _ -> replacement_character : decode cs
+
+    multi_byte :: Int -> Word8 -> Int -> [Char]
+    multi_byte i mask overlong = aux i cs (fromEnum (c .&. mask))
+      where
+        aux 0 rs acc
+          | overlong <= acc && acc <= 0x10ffff &&
+            (acc < 0xd800 || 0xdfff < acc)     &&
+            (acc < 0xfffe || 0xffff < acc)      = chr acc : decode rs
+          | otherwise = replacement_character : decode rs
+
+        aux n (r:rs) acc
+          | r .&. 0xc0 == 0x80 = aux (n-1) rs
+                               $ shiftL acc 6 .|. fromEnum (r .&. 0x3f)
+
+        aux _ rs     _ = replacement_character : decode rs
+