author  EJ <eivind.jahren@gmail.com> 
Mon, 21 Mar 2011 21:04:20 +0300  
changeset 5030  42746c5d4a80 
parent 4975  31da8979e5b1 
child 5060  7d0f6e5b1c1c 
permissions  rwrr 
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1 
{# LANGUAGE OverloadedStrings #} 
1804  2 
module Utils where 
3 

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import Data.Char 

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import Data.Word 

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import qualified Data.Map as Map 

2304  7 
import qualified Data.Set as Set 
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import Numeric 
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import Network.Socket 

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import System.IO 
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import qualified Data.List as List 
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import Control.Monad 
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import qualified Codec.Binary.Base64 as Base64 
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import qualified Data.ByteString.Lazy as BL 
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import qualified Text.Show.ByteString as BS 
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import qualified Data.ByteString.Char8 as B 
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import qualified Data.ByteString as BW 
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1804  19 
import CoreTypes 
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1917  21 

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sockAddr2String :: SockAddr > IO B.ByteString 
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sockAddr2String (SockAddrInet _ hostAddr) = liftM B.pack $ inet_ntoa hostAddr 
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sockAddr2String (SockAddrInet6 _ _ (a, b, c, d) _) = 
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return $ B.pack $ (foldr1 (.) 
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$ List.intersperse (':':) 
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$ concatMap (\n > (\(a0, a1) > [showHex a0, showHex a1]) $ divMod n 65536) [a, b, c, d]) [] 

1917  28 

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toEngineMsg :: B.ByteString > B.ByteString 
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toEngineMsg msg = B.pack $ Base64.encode (fromIntegral (BW.length msg) : BW.unpack msg) 
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fromEngineMsg :: B.ByteString > Maybe B.ByteString 
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fromEngineMsg msg = liftM BW.pack (Base64.decode (B.unpack msg) >>= removeLength) 
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where 
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removeLength (x:xs) = if length xs == fromIntegral x then Just xs else Nothing 
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removeLength _ = Nothing 
2304  37 

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checkNetCmd :: B.ByteString > (Bool, Bool) 
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checkNetCmd msg = check decoded 
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where 
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decoded = fromEngineMsg msg 
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check Nothing = (False, False) 
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check (Just ms)  B.length ms > 0 = let m = B.head ms in (m `Set.member` legalMessages, m == '+') 
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 otherwise = (False, False) 
4972  45 
legalMessages = Set.fromList $ "M#+LlRrUuDdZzAaSjJ,sFNpPwtghbc12345" ++ slotMessages 
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slotMessages = "\128\129\130\131\132\133\134\135\136\137\138" 
1804  47 

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maybeRead :: Read a => String > Maybe a 

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maybeRead s = case reads s of 

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[(x, rest)]  all isSpace rest > Just x 
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_ > Nothing 
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teamToNet :: TeamInfo > [B.ByteString] 
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teamToNet team = 
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"ADD_TEAM" 
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: teamname team 
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: teamgrave team 
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: teamfort team 
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: teamvoicepack team 
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: teamflag team 
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: teamowner team 
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: (showB . difficulty $ team) 
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: hhsInfo 
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where 
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hhsInfo = concatMap (\(HedgehogInfo n hat) > [n, hat]) $ hedgehogs team 
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modifyTeam :: TeamInfo > RoomInfo > RoomInfo 

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modifyTeam team room = room{teams = replaceTeam team $ teams room} 

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where 
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replaceTeam _ [] = error "modifyTeam: no such team" 
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replaceTeam tm (t:ts) = 
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if teamname tm == teamname t then 

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tm : ts 

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else 
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t : replaceTeam tm ts 
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illegalName :: B.ByteString > Bool 
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illegalName s = B.null s  B.all isSpace s  isSpace (B.head s)  isSpace (B.last s) 
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protoNumber2ver :: Word16 > B.ByteString 
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protoNumber2ver v = Map.findWithDefault "Unknown" v vermap 
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where 

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vermap = Map.fromList [ 

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(17, "0.9.7dev") 
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, (19, "0.9.7") 
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, (20, "0.9.8dev") 
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, (21, "0.9.8") 
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, (22, "0.9.9dev") 
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, (23, "0.9.9") 
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, (24, "0.9.10dev") 
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, (25, "0.9.10") 
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, (26, "0.9.11dev") 
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, (27, "0.9.11") 
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, (28, "0.9.12dev") 
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, (29, "0.9.12") 
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, (30, "0.9.13dev") 
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, (31, "0.9.13") 
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, (32, "0.9.14dev") 
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, (33, "0.9.14") 
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, (34, "0.9.15dev") 
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, (35, "0.9.14.1") 
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, (37, "0.9.15") 
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, (38, "0.9.16dev") 
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104 
] 
1804  105 

4921  106 
askFromConsole :: B.ByteString > IO B.ByteString 
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askFromConsole msg = do 
4921  108 
B.putStr msg 
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hFlush stdout 
4921  110 
B.getLine 
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111 

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112 

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unfoldrE :: (b > Either b (a, b)) > b > ([a], b) 
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unfoldrE f b = 
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case f b of 
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Right (a, new_b) > let (a', b') = unfoldrE f new_b in (a : a', b') 
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Left new_b > ([], new_b) 
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118 

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showB :: (BS.Show a) => a > B.ByteString 
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showB = B.concat . BL.toChunks . BS.show 
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121 

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readInt_ :: (Num a) => B.ByteString > a 
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readInt_ str = 
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case B.readInt str of 
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Just (i, t)  B.null t > fromIntegral i 
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_ > 0 