diff options
Diffstat (limited to 'Utility/Directory.hs')
-rw-r--r-- | Utility/Directory.hs | 93 |
1 files changed, 1 insertions, 92 deletions
diff --git a/Utility/Directory.hs b/Utility/Directory.hs index 895581d..e2c6a94 100644 --- a/Utility/Directory.hs +++ b/Utility/Directory.hs @@ -18,15 +18,11 @@ import Control.Monad import System.FilePath import System.PosixCompat.Files import Control.Applicative -import Control.Concurrent import System.IO.Unsafe (unsafeInterleaveIO) import Data.Maybe import Prelude -#ifdef mingw32_HOST_OS -import qualified System.Win32 as Win32 -#else -import qualified System.Posix as Posix +#ifndef mingw32_HOST_OS import Utility.SafeCommand import Control.Monad.IfElse #endif @@ -158,90 +154,3 @@ nukeFile file = void $ tryWhenExists go #else go = removeFile file #endif - -#ifndef mingw32_HOST_OS -data DirectoryHandle = DirectoryHandle IsOpen Posix.DirStream -#else -data DirectoryHandle = DirectoryHandle IsOpen Win32.HANDLE Win32.FindData (MVar ()) -#endif - -type IsOpen = MVar () -- full when the handle is open - -openDirectory :: FilePath -> IO DirectoryHandle -openDirectory path = do -#ifndef mingw32_HOST_OS - dirp <- Posix.openDirStream path - isopen <- newMVar () - return (DirectoryHandle isopen dirp) -#else - (h, fdat) <- Win32.findFirstFile (path </> "*") - -- Indicate that the fdat contains a filename that readDirectory - -- has not yet returned, by making the MVar be full. - -- (There's always at least a "." entry.) - alreadyhave <- newMVar () - isopen <- newMVar () - return (DirectoryHandle isopen h fdat alreadyhave) -#endif - -closeDirectory :: DirectoryHandle -> IO () -#ifndef mingw32_HOST_OS -closeDirectory (DirectoryHandle isopen dirp) = - whenOpen isopen $ - Posix.closeDirStream dirp -#else -closeDirectory (DirectoryHandle isopen h _ alreadyhave) = - whenOpen isopen $ do - _ <- tryTakeMVar alreadyhave - Win32.findClose h -#endif - where - whenOpen :: IsOpen -> IO () -> IO () - whenOpen mv f = do - v <- tryTakeMVar mv - when (isJust v) f - -{- |Reads the next entry from the handle. Once the end of the directory -is reached, returns Nothing and automatically closes the handle. --} -readDirectory :: DirectoryHandle -> IO (Maybe FilePath) -#ifndef mingw32_HOST_OS -readDirectory hdl@(DirectoryHandle _ dirp) = do - e <- Posix.readDirStream dirp - if null e - then do - closeDirectory hdl - return Nothing - else return (Just e) -#else -readDirectory hdl@(DirectoryHandle _ h fdat mv) = do - -- If the MVar is full, then the filename in fdat has - -- not yet been returned. Otherwise, need to find the next - -- file. - r <- tryTakeMVar mv - case r of - Just () -> getfn - Nothing -> do - more <- Win32.findNextFile h fdat - if more - then getfn - else do - closeDirectory hdl - return Nothing - where - getfn = do - filename <- Win32.getFindDataFileName fdat - return (Just filename) -#endif - --- True only when directory exists and contains nothing. --- Throws exception if directory does not exist. -isDirectoryEmpty :: FilePath -> IO Bool -isDirectoryEmpty d = bracket (openDirectory d) closeDirectory check - where - check h = do - v <- readDirectory h - case v of - Nothing -> return True - Just f - | not (dirCruft f) -> return False - | otherwise -> check h |