use correct names of IOArray operations for nhc98

[haskell-directory.git] / System / Directory.hs

diff --git a/System/Directory.hs b/System/Directory.hs
index 5ff3e77..bdd7f3c 100644 (file)
--- a/System/Directory.hs
+++ b/System/Directory.hs
@@ -79,6 +79,11 @@ import NHC.FFI
 import Hugs.Directory
 #endif /* __HUGS__ */
 
+#if defined(__GLASGOW_HASKELL__) || defined(mingw32_HOST_OS)
+import Foreign
+import Foreign.C
+#endif
+
 #ifdef __GLASGOW_HASKELL__
 import Prelude
 
@@ -87,8 +92,6 @@ import System.Posix.Types
 import System.Posix.Internals
 import System.Time             ( ClockTime(..) )
 import System.IO
-import Foreign
-import Foreign.C
 
 import GHC.IOBase      ( IOException(..), IOErrorType(..), ioException )
 
@@ -576,7 +579,32 @@ canonicalizePath fpath = return fpath
 -- such executable. For example (findExecutable \"ghc\")
 -- gives you the path to GHC.
 findExecutable :: String -> IO (Maybe FilePath)
-findExecutable binary = do
+findExecutable binary =
+#if defined(mingw32_HOST_OS)
+  withCString binary $ \c_binary ->
+  withCString ('.':exeExtension) $ \c_ext ->
+  allocaBytes long_path_size $ \pOutPath ->
+  alloca $ \ppFilePart -> do
+    res <- c_SearchPath nullPtr c_binary c_ext (fromIntegral long_path_size) pOutPath ppFilePart
+    if res > 0 && res < fromIntegral long_path_size
+      then do fpath <- peekCString pOutPath
+              return (Just fpath)
+      else return Nothing
+
+foreign import stdcall unsafe "SearchPathA"
+            c_SearchPath :: CString
+                         -> CString
+                         -> CString
+                         -> CInt
+                         -> CString
+                         -> Ptr CString
+                         -> IO CInt
+# if !defined(__GLASGOW_HASKELL__)
+long_path_size :: Int
+long_path_size = 4096
+# endif
+#else
+ do
   path <- getEnv "PATH"
   search (parseSearchPath path)
   where
@@ -589,6 +617,8 @@ findExecutable binary = do
        b <- doesFileExist path
        if b then return (Just path)
              else search ds
+#endif
+
 
 #ifdef __GLASGOW_HASKELL__
 {- |@'getDirectoryContents' dir@ returns a list of /all/ entries