diff options
Diffstat (limited to 'src/Windows/Registry.hs')
| -rw-r--r-- | src/Windows/Registry.hs | 49 |
1 files changed, 42 insertions, 7 deletions
diff --git a/src/Windows/Registry.hs b/src/Windows/Registry.hs index 8a7f3fd..cb44ffe 100644 --- a/src/Windows/Registry.hs +++ b/src/Windows/Registry.hs @@ -6,6 +6,8 @@ -- -- Low-level utility functions for reading and writing registry values. +{-# OPTIONS_GHC -XTupleSections #-} + module Windows.Registry ( IsKeyPath(..) , RootKey(..) @@ -43,7 +45,7 @@ import Foreign.ForeignPtr (withForeignPtr) import Foreign.Marshal.Alloc (alloca, allocaBytes) import Foreign.Marshal.Array (peekArray, pokeArray) import Foreign.Storable (peek, poke) -import System.IO.Error (catchIOError) +import System.IO.Error (catchIOError, isDoesNotExistError) import qualified System.Win32.Types as WinAPI import qualified System.Win32.Registry as WinAPI @@ -160,9 +162,20 @@ queryValue keyPath valueName = allocaBytes valueSize $ \bufferPtr -> do WinAPI.failUnlessSuccess "RegQueryValueExW" $ c_RegQueryValueEx keyHandlePtr valueNamePtr WinAPI.nullPtr valueTypePtr bufferPtr valueSizePtr - buffer <- peekArray valueSize bufferPtr - valueType <- peek valueTypePtr - return (toEnum $ fromIntegral valueType, B.pack buffer) + buffer <- B.pack <$> peekArray valueSize bufferPtr + valueType <- toEnum . fromIntegral <$> peek valueTypePtr + return (valueType, buffer) + +queryType :: IsKeyPath a => a -> ValueName -> IO (Either IOError ValueType) +queryType keyPath valueName = + openCloseCatch keyPath $ \keyHandle -> + withForeignPtr keyHandle $ \keyHandlePtr -> + WinAPI.withTString valueName $ \valueNamePtr -> + alloca $ \valueTypePtr -> do + WinAPI.failUnlessSuccess "RegQueryValueExW" $ + c_RegQueryValueEx keyHandlePtr valueNamePtr WinAPI.nullPtr valueTypePtr WinAPI.nullPtr WinAPI.nullPtr + valueType <- toEnum . fromIntegral <$> peek valueTypePtr + return valueType data GetValueFlag = RestrictAny | RestrictNone @@ -207,12 +220,25 @@ getValue keyPath valueName flags = WinAPI.failUnlessSuccess "RegGetValueW" $ c_RegGetValue keyHandlePtr WinAPI.nullPtr valueNamePtr rawFlags valueTypePtr bufferPtr valueSizePtr bufferSize <- fromIntegral <$> peek valueSizePtr - buffer <- peekArray bufferSize bufferPtr - valueType <- peek valueTypePtr - return (toEnum $ fromIntegral valueType, B.pack buffer) + buffer <- B.pack <$> peekArray bufferSize bufferPtr + valueType <- toEnum . fromIntegral <$> peek valueTypePtr + return (valueType, buffer) where rawFlags = fromIntegral $ foldr (.|.) 0 $ map fromEnum flags +getType :: IsKeyPath a => a -> ValueName -> [GetValueFlag] -> IO (Either IOError ValueType) +getType keyPath valueName flags = + openCloseCatch keyPath $ \keyHandle -> + withForeignPtr keyHandle $ \keyHandlePtr -> + WinAPI.withTString valueName $ \valueNamePtr -> + alloca $ \valueTypePtr -> do + WinAPI.failUnlessSuccess "RegGetValueW" $ + c_RegGetValue keyHandlePtr WinAPI.nullPtr valueNamePtr rawFlags valueTypePtr WinAPI.nullPtr WinAPI.nullPtr + valueType <- toEnum . fromIntegral <$> peek valueTypePtr + return valueType + where + rawFlags = fromIntegral $ foldr (.|.) 0 $ map fromEnum $ DoNotExpand : flags + getExpandedString :: IsKeyPath a => a -> ValueName -> IO (Either IOError String) getExpandedString keyPath valueName = do valueData <- getValue keyPath valueName [RestrictString, RestrictExpandableString] @@ -240,6 +266,15 @@ setExpandableString :: IsKeyPath a => a -> ValueName -> String -> IO (Either IOE setExpandableString keyPath valueName valueData = setValue keyPath valueName (TypeExpandableString, encodeString valueData) +setStringPreserveType :: IsKeyPath a => a -> ValueName -> String -> IO (Either IOError ()) +setStringPreserveType keyPath valueName valueData = do + valueType <- stringIfMissing <$> getType keyPath valueName [RestrictString, RestrictExpandableString] + either (return . Left) (setValue keyPath valueName . (, encodeString valueData)) valueType + where + stringIfMissing (Left e) | isDoesNotExistError e = Right TypeString + | otherwise = Left e + stringIfMissing (Right x) = Right x + deleteValue :: IsKeyPath a => a -> ValueName -> IO (Either IOError ()) deleteValue keyPath valueName = openCloseCatch keyPath $ \keyHandle -> |