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-rw-r--r--src/Windows/Environment.hs27
-rw-r--r--src/Windows/Registry.hs40
2 files changed, 34 insertions, 33 deletions
diff --git a/src/Windows/Environment.hs b/src/Windows/Environment.hs
index 8597d42..0399d5b 100644
--- a/src/Windows/Environment.hs
+++ b/src/Windows/Environment.hs
@@ -20,9 +20,10 @@ module Windows.Environment
, pathSplit
) where
-import Control.Exception (finally)
-import Data.List (intercalate)
-import Data.List.Split (splitOn)
+import Control.Monad.Trans.Class (lift)
+import Control.Monad.Trans.Except (ExceptT(..))
+import Data.List (intercalate)
+import Data.List.Split (splitOn)
import qualified Windows.Registry as Registry
import Windows.Utils (notifyEnvironmentUpdate)
@@ -44,18 +45,20 @@ profileKeyPath AllUsers = Registry.KeyPath Registry.LocalMachine
type VarName = String
type VarValue = String
-query :: Profile -> VarName -> IO (Either IOError VarValue)
+query :: Profile -> VarName -> ExceptT IOError IO VarValue
query profile name = Registry.getExpandedString (profileKeyPath profile) name
-engrave :: Profile -> VarName -> VarValue -> IO (Either IOError ())
-engrave profile name value = finally doEngrave notifyEnvironmentUpdate
- where
- doEngrave = Registry.setStringPreserveType (profileKeyPath profile) name value
+engrave :: Profile -> VarName -> VarValue -> ExceptT IOError IO ()
+engrave profile name value = do
+ ret <- Registry.setStringPreserveType (profileKeyPath profile) name value
+ lift notifyEnvironmentUpdate
+ return ret
-wipe :: Profile -> VarName -> IO (Either IOError ())
-wipe profile name = finally doWipe notifyEnvironmentUpdate
- where
- doWipe = Registry.deleteValue (profileKeyPath profile) name
+wipe :: Profile -> VarName -> ExceptT IOError IO ()
+wipe profile name = do
+ ret <- Registry.deleteValue (profileKeyPath profile) name
+ lift notifyEnvironmentUpdate
+ return ret
pathSep :: VarValue
pathSep = ";"
diff --git a/src/Windows/Registry.hs b/src/Windows/Registry.hs
index c0ead17..5203fb8 100644
--- a/src/Windows/Registry.hs
+++ b/src/Windows/Registry.hs
@@ -6,8 +6,6 @@
--
-- Low-level utility functions for reading and writing registry values.
-{-# OPTIONS_GHC -XTupleSections #-}
-
module Windows.Registry
( IsKeyPath(..)
, RootKey(..)
@@ -45,6 +43,7 @@ import Data.Tuple (swap)
import qualified Data.Text as T
import Data.Text.Encoding (decodeUtf16LE, encodeUtf16LE)
import Control.Exception (bracket)
+import Control.Monad.Trans.Except (ExceptT(..), catchE, throwE)
import Foreign.ForeignPtr (withForeignPtr)
import Foreign.Marshal.Alloc (alloca, allocaBytes)
import Foreign.Marshal.Array (peekArray, pokeArray)
@@ -138,10 +137,10 @@ decodeString (_, bytes) = T.unpack dropLastZero
| T.last text == '\0' = T.init text
| otherwise = text
-openCloseCatch :: IsKeyPath a => a -> (Handle -> IO b) -> IO (Either IOError b)
-openCloseCatch keyPath f = catchIOError (fmap Right openClose) $ return . Left
+openCloseCatch :: IsKeyPath a => a -> (Handle -> IO b) -> ExceptT IOError IO b
+openCloseCatch keyPath f = ExceptT $ catchIOError (openApplyClose >>= return . Right) $ return . Left
where
- openClose = bracket (openUnsafe keyPath) close f
+ openApplyClose = bracket (openUnsafe keyPath) close f
foreign import ccall unsafe "Windows.h RegQueryValueExW"
c_RegQueryValueEx :: WinAPI.PKEY -> WinAPI.LPCTSTR -> WinAPI.LPDWORD -> WinAPI.LPDWORD -> WinAPI.LPBYTE -> WinAPI.LPDWORD -> IO WinAPI.ErrCode
@@ -152,7 +151,7 @@ foreign import ccall unsafe "Windows.h RegSetValueExW"
foreign import ccall unsafe "Windows.h RegGetValueW"
c_RegGetValue :: WinAPI.PKEY -> WinAPI.LPCTSTR -> WinAPI.LPCTSTR -> WinAPI.DWORD -> WinAPI.LPDWORD -> WinAPI.LPBYTE -> WinAPI.LPDWORD -> IO WinAPI.ErrCode
-queryValue :: IsKeyPath a => a -> ValueName -> IO (Either IOError ValueData)
+queryValue :: IsKeyPath a => a -> ValueName -> ExceptT IOError IO ValueData
queryValue keyPath valueName =
openCloseCatch keyPath $ \keyHandle ->
withForeignPtr keyHandle $ \keyHandlePtr ->
@@ -170,7 +169,7 @@ queryValue keyPath valueName =
valueType <- toEnum . fromIntegral <$> peek valueTypePtr
return (valueType, buffer)
-queryType :: IsKeyPath a => a -> ValueName -> IO (Either IOError ValueType)
+queryType :: IsKeyPath a => a -> ValueName -> ExceptT IOError IO ValueType
queryType keyPath valueName =
openCloseCatch keyPath $ \keyHandle ->
withForeignPtr keyHandle $ \keyHandlePtr ->
@@ -209,7 +208,7 @@ getValueFlagsTable =
, (DoNotExpand, 0x10000000)
]
-getValue :: IsKeyPath a => a -> ValueName -> [GetValueFlag] -> IO (Either IOError ValueData)
+getValue :: IsKeyPath a => a -> ValueName -> [GetValueFlag] -> ExceptT IOError IO ValueData
getValue keyPath valueName flags =
openCloseCatch keyPath $ \keyHandle ->
withForeignPtr keyHandle $ \keyHandlePtr ->
@@ -230,7 +229,7 @@ getValue keyPath valueName flags =
where
rawFlags = fromIntegral $ foldr (.|.) 0 $ map fromEnum flags
-getType :: IsKeyPath a => a -> ValueName -> [GetValueFlag] -> IO (Either IOError ValueType)
+getType :: IsKeyPath a => a -> ValueName -> [GetValueFlag] -> ExceptT IOError IO ValueType
getType keyPath valueName flags =
openCloseCatch keyPath $ \keyHandle ->
withForeignPtr keyHandle $ \keyHandlePtr ->
@@ -243,12 +242,12 @@ getType keyPath valueName flags =
where
rawFlags = fromIntegral $ foldr (.|.) 0 $ map fromEnum $ DoNotExpand : flags
-getExpandedString :: IsKeyPath a => a -> ValueName -> IO (Either IOError String)
+getExpandedString :: IsKeyPath a => a -> ValueName -> ExceptT IOError IO String
getExpandedString keyPath valueName = do
valueData <- getValue keyPath valueName [RestrictString, RestrictExpandableString]
- return $ fmap decodeString valueData
+ return $ decodeString valueData
-setValue :: IsKeyPath a => a -> ValueName -> ValueData -> IO (Either IOError ())
+setValue :: IsKeyPath a => a -> ValueName -> ValueData -> ExceptT IOError IO ()
setValue keyPath valueName (valueType, valueData) =
openCloseCatch keyPath $ \keyHandle ->
withForeignPtr keyHandle $ \keyHandlePtr ->
@@ -262,24 +261,23 @@ setValue keyPath valueName (valueType, valueData) =
buffer = B.unpack valueData
bufferSize = B.length valueData
-setString :: IsKeyPath a => a -> ValueName -> String -> IO (Either IOError ())
+setString :: IsKeyPath a => a -> ValueName -> String -> ExceptT IOError IO ()
setString keyPath valueName valueData =
setValue keyPath valueName (TypeString, encodeString valueData)
-setExpandableString :: IsKeyPath a => a -> ValueName -> String -> IO (Either IOError ())
+setExpandableString :: IsKeyPath a => a -> ValueName -> String -> ExceptT IOError IO ()
setExpandableString keyPath valueName valueData =
setValue keyPath valueName (TypeExpandableString, encodeString valueData)
-setStringPreserveType :: IsKeyPath a => a -> ValueName -> String -> IO (Either IOError ())
+setStringPreserveType :: IsKeyPath a => a -> ValueName -> String -> ExceptT IOError IO ()
setStringPreserveType keyPath valueName valueData = do
- valueType <- stringIfMissing <$> getType keyPath valueName [RestrictString, RestrictExpandableString]
- either (return . Left) (setValue keyPath valueName . (, encodeString valueData)) valueType
+ valueType <- getType keyPath valueName [RestrictString, RestrictExpandableString] `catchE` stringByDefault
+ setValue keyPath valueName (valueType, encodeString valueData)
where
- stringIfMissing (Left e) | isDoesNotExistError e = Right TypeString
- | otherwise = Left e
- stringIfMissing (Right x) = Right x
+ stringByDefault e | isDoesNotExistError e = return TypeString
+ | otherwise = throwE e
-deleteValue :: IsKeyPath a => a -> ValueName -> IO (Either IOError ())
+deleteValue :: IsKeyPath a => a -> ValueName -> ExceptT IOError IO ()
deleteValue keyPath valueName =
openCloseCatch keyPath $ \keyHandle ->
withForeignPtr keyHandle $ \keyHandlePtr ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 16:34:10 +0000