| 3 | | module Pugs.Types.Hash where |
| | 3 | class (Typeable a) => HashClass a where |
| | 4 | hash_iType :: a -> Type |
| | 5 | hash_iType = const $ mkType "Hash" |
| | 6 | hash_fetch :: a -> Eval VHash |
| | 7 | hash_fetch hv = do |
| | 8 | keys <- hash_fetchKeys hv |
| | 9 | vals <- mapM (hash_fetchVal hv) keys |
| | 10 | return . Map.fromList $ keys `zip` vals |
| | 11 | hash_store :: a -> VHash -> Eval () |
| | 12 | hash_store hv vals = do |
| | 13 | hash_clear hv |
| | 14 | forM_ (Map.assocs vals) $ \(key, val) -> do |
| | 15 | hash_storeVal hv key val |
| | 16 | hash_fetchElem :: a -> HashIndex -> Eval (IVar VScalar) -- autovivify |
| | 17 | hash_fetchElem hv key = do |
| | 18 | return $ proxyScalar (hash_fetchVal hv key) (hash_storeVal hv key) |
| | 19 | hash_storeElem :: a -> HashIndex -> IVar VScalar -> Eval () -- binding |
| | 20 | hash_storeElem hv idx sv = do |
| | 21 | val <- readIVar sv |
| | 22 | hash_storeVal hv idx val |
| | 23 | hash_fetchVal :: a -> HashIndex -> Eval Val |
| | 24 | hash_fetchVal hv key = do |
| | 25 | rv <- hash_existsElem hv key |
| | 26 | if rv then readIVar =<< hash_fetchElem hv key |
| | 27 | else return undef |
| | 28 | hash_storeVal :: a -> HashIndex -> Val -> Eval () |
| | 29 | hash_storeVal hv key val = do |
| | 30 | sv <- hash_fetchElem hv key |
| | 31 | writeIVar sv val |
| | 32 | hash_fetchKeys :: a -> Eval [HashIndex] |
| | 33 | hash_fetchKeys hv = do |
| | 34 | vals <- hash_fetch hv |
| | 35 | return $ Map.keys vals |
| | 36 | hash_deleteElem :: a -> HashIndex -> Eval () |
| | 37 | hash_existsElem :: a -> HashIndex -> Eval VBool |
| | 38 | hash_existsElem hv idx = do |
| | 39 | keys <- hash_fetchKeys hv |
| | 40 | return $ idx `elem` keys |
| | 41 | hash_clear :: a -> Eval () |
| | 42 | hash_clear hv = do |
| | 43 | keys <- hash_fetchKeys hv |
| | 44 | mapM_ (hash_deleteElem hv) keys |
| | 45 | hash_isEmpty :: a -> Eval VBool |
| | 46 | hash_isEmpty hv = do |
| | 47 | keys <- hash_fetchKeys hv |
| | 48 | return $ null keys |
| 10 | | type Index = VStr |
| | 65 | instance HashClass VHash where |
| | 66 | hash_iType = const $ mkType "Hash::Const" |
| | 67 | hash_fetch = return |
| | 68 | hash_fetchKeys = return . Map.keys |
| | 69 | hash_fetchVal hv idx = return $ Map.findWithDefault undef idx hv |
| | 70 | hash_clear _ = retConstError undef |
| | 71 | hash_store _ _ = retConstError undef |
| | 72 | hash_storeVal _ _ _ = retConstError undef |
| | 73 | hash_storeElem _ _ _ = retConstError undef |
| | 74 | hash_deleteElem _ _ = retConstError undef |
| 12 | | class (Typeable a) => Class a where |
| 13 | | iType :: a -> Type |
| 14 | | iType = const $ mkType "Hash" |
| 15 | | fetch :: a -> Eval VHash |
| 16 | | fetch hv = do |
| 17 | | keys <- fetchKeys hv |
| 18 | | vals <- mapM (fetchVal hv) keys |
| 19 | | return . Map.fromList $ keys `zip` vals |
| 20 | | store :: a -> VHash -> Eval () |
| 21 | | store hv vals = do |
| 22 | | clear hv |
| 23 | | forM_ (Map.assocs vals) $ \(key, val) -> do |
| 24 | | storeVal hv key val |
| 25 | | fetchElem :: a -> Index -> Eval (IVar VScalar) -- autovivify |
| 26 | | fetchElem hv key = do |
| 27 | | return $ proxyScalar (fetchVal hv key) (storeVal hv key) |
| 28 | | storeElem :: a -> Index -> IVar VScalar -> Eval () -- binding |
| 29 | | storeElem hv idx sv = do |
| 30 | | val <- readIVar sv |
| 31 | | storeVal hv idx val |
| 32 | | fetchVal :: a -> Index -> Eval Val |
| 33 | | fetchVal hv key = do |
| 34 | | rv <- existsElem hv key |
| 35 | | if rv then readIVar =<< fetchElem hv key |
| 36 | | else return undef |
| 37 | | storeVal :: a -> Index -> Val -> Eval () |
| 38 | | storeVal hv key val = do |
| 39 | | sv <- fetchElem hv key |
| 40 | | writeIVar sv val |
| 41 | | fetchKeys :: a -> Eval [Index] |
| 42 | | fetchKeys hv = do |
| 43 | | vals <- fetch hv |
| 44 | | return $ Map.keys vals |
| 45 | | deleteElem :: a -> Index -> Eval () |
| 46 | | existsElem :: a -> Index -> Eval VBool |
| 47 | | existsElem hv idx = do |
| 48 | | keys <- fetchKeys hv |
| 49 | | return $ idx `elem` keys |
| 50 | | clear :: a -> Eval () |
| 51 | | clear hv = do |
| 52 | | keys <- fetchKeys hv |
| 53 | | mapM_ (deleteElem hv) keys |
| 54 | | isEmpty :: a -> Eval VBool |
| 55 | | isEmpty hv = do |
| 56 | | keys <- fetchKeys hv |
| 57 | | return $ null keys |
| | 76 | instance HashClass IHashEnv where |
| | 77 | hash_iType = const $ mkType "Hash::Env" |
| | 78 | hash_fetch _ = do |
| | 79 | envs <- liftIO getEnvironment |
| | 80 | return . Map.map VStr $ Map.fromList envs |
| | 81 | hash_fetchVal _ key = tryIO undef $ do |
| | 82 | str <- getEnv key |
| | 83 | return $ VStr str |
| | 84 | hash_storeVal _ key val = do |
| | 85 | str <- fromVal val |
| | 86 | liftIO $ setEnv key str True |
| | 87 | hash_existsElem _ key = tryIO False $ do |
| | 88 | getEnv key |
| | 89 | return True |
| | 90 | hash_deleteElem _ key = do |
| | 91 | liftIO $ unsetEnv key |
| | 92 | |
| | 93 | instance HashClass IHash where |
| | 94 | hash_fetch hv = do |
| | 95 | svMap <- liftSTM $ readTVar hv |
| | 96 | fmap Map.fromList $ forM (Map.assocs svMap) $ \(key, sv) -> do |
| | 97 | val <- readIVar sv |
| | 98 | return (key, val) |
| | 99 | hash_fetchKeys hv = do |
| | 100 | liftSTM . fmap Map.keys $ readTVar hv |
| | 101 | hash_fetchElem hv idx = do |
| | 102 | svMap <- liftSTM $ readTVar hv |
| | 103 | case Map.lookup idx svMap of |
| | 104 | Just sv -> return sv |
| | 105 | Nothing -> do |
| | 106 | sv <- newScalar undef |
| | 107 | liftSTM $ modifyTVar hv (Map.insert idx sv) |
| | 108 | return sv |
| | 109 | hash_storeElem hv idx sv = do |
| | 110 | liftSTM $ modifyTVar hv (Map.insert idx sv) |
| | 111 | hash_deleteElem hv idx = do |
| | 112 | liftSTM $ modifyTVar hv (Map.delete idx) |
| | 113 | hash_existsElem hv idx = do |
| | 114 | liftSTM $ do |
| | 115 | svMap <- readTVar hv |
| | 116 | return $ Map.member idx svMap |