diff options
Diffstat (limited to '')
| -rw-r--r-- | src/Registry.hs | 133 |
1 files changed, 68 insertions, 65 deletions
diff --git a/src/Registry.hs b/src/Registry.hs index d6c3f26..a38ef00 100644 --- a/src/Registry.hs +++ b/src/Registry.hs @@ -4,21 +4,24 @@ - See LICENSE.txt for details. -} -module Registry ( delValue - , getString - , hkcu - , hklm - , setString - , KeyHandle ) where +module Registry + ( KeyHandle + , delValue + , getString + , setString + , hkcu + , hklm + ) where + +import Control.Exception (bracket) +import Data.Maybe (fromMaybe) +import Foreign.ForeignPtr (withForeignPtr) +import Foreign.Marshal.Alloc (alloca, allocaBytes) +import Foreign.Ptr (castPtr, plusPtr) +import Foreign.Storable (peek, poke, sizeOf) +import Graphics.Win32.Window (sendMessage) +import System.IO.Error (mkIOError, doesNotExistErrorType) -import Control.Exception ( bracket ) -import Data.Maybe ( fromMaybe ) -import Foreign.ForeignPtr ( withForeignPtr ) -import Foreign.Marshal.Alloc ( alloca, allocaBytes ) -import Foreign.Ptr ( castPtr, plusPtr ) -import Foreign.Storable ( peek, poke, sizeOf ) -import Graphics.Win32.Window ( sendMessage ) -import System.IO.Error ( mkIOError, doesNotExistErrorType ) import System.Win32.Types import System.Win32.Registry @@ -26,69 +29,69 @@ newtype KeyHandle = KeyHandle HKEY getType :: HKEY -> String -> String -> IO (Maybe RegValueType) getType key subKeyPath valueName = - bracket (regOpenKey key subKeyPath) regCloseKey $ \hKey -> - withForeignPtr hKey $ \p_key -> - withTString valueName $ \p_valueName -> - alloca $ \p_type -> do - ret <- c_RegQueryValueEx p_key p_valueName nullPtr p_type nullPtr nullPtr - case ret of - 0x0 -> do - type_ <- peek p_type - return $ Just type_ - 0x2 -> return Nothing - _ -> failWith "RegQueryValueEx" ret + bracket (regOpenKey key subKeyPath) regCloseKey $ \hKey -> + withForeignPtr hKey $ \p_key -> + withTString valueName $ \p_valueName -> + alloca $ \p_type -> do + ret <- c_RegQueryValueEx p_key p_valueName nullPtr p_type nullPtr nullPtr + case ret of + 0x0 -> do + type_ <- peek p_type + return $ Just type_ + 0x2 -> return Nothing + _ -> failWith "RegQueryValueEx" ret getString :: KeyHandle -> String -> String -> IO String getString (KeyHandle hKey) subKeyPath valueName = - bracket (regOpenKey hKey subKeyPath) regCloseKey $ \hSubKey -> - withForeignPtr hSubKey $ \p_key -> - withTString valueName $ \p_valueName -> - alloca $ \dataSizePtr -> do - poke dataSizePtr 0 - ret <- c_RegQueryValueEx p_key p_valueName nullPtr nullPtr nullPtr dataSizePtr - case ret of - 0x0 -> do - dataSize <- peek dataSizePtr - let newDataSize = dataSize + fromIntegral (sizeOf (undefined :: TCHAR)) - poke dataSizePtr newDataSize - allocaBytes (fromIntegral newDataSize) $ \dataPtr -> do - poke (castPtr $ plusPtr dataPtr $ fromIntegral dataSize) '\0' - failUnlessSuccess "RegQueryValueEx" $ - c_RegQueryValueEx p_key p_valueName nullPtr nullPtr dataPtr dataSizePtr - peekTString $ castPtr dataPtr - 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName) - _ -> failWith "RegQueryValueEx" ret + bracket (regOpenKey hKey subKeyPath) regCloseKey $ \hSubKey -> + withForeignPtr hSubKey $ \p_key -> + withTString valueName $ \p_valueName -> + alloca $ \dataSizePtr -> do + poke dataSizePtr 0 + ret <- c_RegQueryValueEx p_key p_valueName nullPtr nullPtr nullPtr dataSizePtr + case ret of + 0x0 -> do + dataSize <- peek dataSizePtr + let newDataSize = dataSize + fromIntegral (sizeOf (undefined :: TCHAR)) + poke dataSizePtr newDataSize + allocaBytes (fromIntegral newDataSize) $ \dataPtr -> do + poke (castPtr $ plusPtr dataPtr $ fromIntegral dataSize) '\0' + failUnlessSuccess "RegQueryValueEx" $ + c_RegQueryValueEx p_key p_valueName nullPtr nullPtr dataPtr dataSizePtr + peekTString $ castPtr dataPtr + 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName) + _ -> failWith "RegQueryValueEx" ret setString :: KeyHandle -> String -> String -> String -> IO () setString (KeyHandle hKey) subKeyPath valueName valueValue = - bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey -> - withTString valueValue $ \p_valueValue -> do - type_ <- getType hKey subKeyPath valueName - regSetValueEx subKey valueName (fromMaybe rEG_SZ type_) p_valueValue $ (length valueValue + 1) * sizeOf (undefined :: TCHAR) - notifyEnvironmentUpdate + bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey -> + withTString valueValue $ \p_valueValue -> do + type_ <- getType hKey subKeyPath valueName + regSetValueEx subKey valueName (fromMaybe rEG_SZ type_) p_valueValue $ (length valueValue + 1) * sizeOf (undefined :: TCHAR) + notifyEnvironmentUpdate notifyEnvironmentUpdate :: IO () notifyEnvironmentUpdate = - withTString "Environment" $ \p_lparam -> do - let wparam = 0 - let lparam = fromIntegral $ castPtrToUINTPtr p_lparam - let hwnd = castUINTPtrToPtr 0xffff - _ <- sendMessage hwnd wM_SETTINGCHANGE wparam lparam - return () - where - wM_SETTINGCHANGE = 0x1A + withTString "Environment" $ \p_lparam -> do + let wparam = 0 + let lparam = fromIntegral $ castPtrToUINTPtr p_lparam + let hwnd = castUINTPtrToPtr 0xffff + _ <- sendMessage hwnd wM_SETTINGCHANGE wparam lparam + return () + where + wM_SETTINGCHANGE = 0x1A delValue :: KeyHandle -> String -> String -> IO () delValue (KeyHandle hKey) subKeyPath valueName = - bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey -> - withForeignPtr subKey $ \subKeyPtr -> - withTString valueName $ \p_valueName -> do - ret <- c_RegDeleteValue subKeyPtr p_valueName - notifyEnvironmentUpdate - case ret of - 0x0 -> return () - 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName) - _ -> failWith "RegDeleteValue" ret + bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey -> + withForeignPtr subKey $ \subKeyPtr -> + withTString valueName $ \p_valueName -> do + ret <- c_RegDeleteValue subKeyPtr p_valueName + notifyEnvironmentUpdate + case ret of + 0x0 -> return () + 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName) + _ -> failWith "RegDeleteValue" ret hkcu :: KeyHandle hkcu = KeyHandle hKEY_CURRENT_USER |