refactor

Utility/FileSystemEncoding.hs

@@ -0,0 +1,18 @@
+{- File system encoding handling.
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Utility.FileSystemEncoding where
+
+import GHC.IO.Encoding (getFileSystemEncoding)
+import GHC.Foreign as GHC
+
+{- Marshal a Haskell FilePath into a NUL terminated C string using temporary
+ - storage. The FilePath is encoded using the filesystem encoding,
+ - reversing the decoding that should have been done when the FilePath
+ - was obtained. -}
+withFilePath :: FilePath -> (CString -> IO a) -> IO a
+withFilePath fp f = getFileSystemEncoding >>= \enc -> GHC.withCString enc fp f