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-rw-r--r--src/Utility/FileSystemEncoding.hs19
1 files changed, 17 insertions, 2 deletions
diff --git a/src/Utility/FileSystemEncoding.hs b/src/Utility/FileSystemEncoding.hs
index 41c5972a..2d9691d5 100644
--- a/src/Utility/FileSystemEncoding.hs
+++ b/src/Utility/FileSystemEncoding.hs
@@ -13,6 +13,7 @@ module Utility.FileSystemEncoding (
withFilePath,
md5FilePath,
decodeBS,
+ encodeBS,
decodeW8,
encodeW8,
encodeW8NUL,
@@ -34,6 +35,8 @@ import qualified Data.ByteString.Lazy as L
import qualified Data.ByteString.Lazy.UTF8 as L8
#endif
+import Utility.Exception
+
{- Sets a Handle to use the filesystem encoding. This causes data
- written or read from it to be encoded/decoded the same
- as ghc 7.4 does to filenames etc. This special encoding
@@ -67,12 +70,16 @@ withFilePath fp f = Encoding.getFileSystemEncoding
- only allows doing this conversion with CStrings, and the CString buffer
- is allocated, used, and deallocated within the call, with no side
- effects.
+ -
+ - If the FilePath contains a value that is not legal in the filesystem
+ - encoding, rather than thowing an exception, it will be returned as-is.
-}
{-# NOINLINE _encodeFilePath #-}
_encodeFilePath :: FilePath -> String
_encodeFilePath fp = unsafePerformIO $ do
enc <- Encoding.getFileSystemEncoding
- GHC.withCString enc fp $ GHC.peekCString Encoding.char8
+ GHC.withCString enc fp (GHC.peekCString Encoding.char8)
+ `catchNonAsync` (\_ -> return fp)
{- Encodes a FilePath into a Md5.Str, applying the filesystem encoding. -}
md5FilePath :: FilePath -> MD5.Str
@@ -81,13 +88,21 @@ md5FilePath = MD5.Str . _encodeFilePath
{- Decodes a ByteString into a FilePath, applying the filesystem encoding. -}
decodeBS :: L.ByteString -> FilePath
#ifndef mingw32_HOST_OS
-decodeBS = encodeW8 . L.unpack
+decodeBS = encodeW8NUL . L.unpack
#else
{- On Windows, we assume that the ByteString is utf-8, since Windows
- only uses unicode for filenames. -}
decodeBS = L8.toString
#endif
+{- Encodes a FilePath into a ByteString, applying the filesystem encoding. -}
+encodeBS :: FilePath -> L.ByteString
+#ifndef mingw32_HOST_OS
+encodeBS = L.pack . decodeW8NUL
+#else
+encodeBS = L8.fromString
+#endif
+
{- Converts a [Word8] to a FilePath, encoding using the filesystem encoding.
-
- w82c produces a String, which may contain Chars that are invalid