{-# LINE 1 "libraries\\Win32\\System\\Win32\\SymbolicLink.hsc" #-}
{-# LANGUAGE CPP #-}
{- |

   Module      :  System.Win32.SymbolicLink

   Copyright   :  2012 shelarcy

   License     :  BSD-style



   Maintainer  :  shelarcy@gmail.com

   Stability   :  Provisional

   Portability :  Non-portable (Win32 API)



   Handling symbolic link using Win32 API. [Vista of later and desktop app only]



   Note: You should worry about UAC (User Account Control) when use this module's function in your application:



     * require to use 'Run As Administrator' to run your application.



     * or modify your application's manifect file to add

       \<requestedExecutionLevel level='requireAdministrator' uiAccess='false'/\>.

-}
module System.Win32.SymbolicLink
  ( module System.Win32.SymbolicLink
  ) where

import System.Win32.Types
import System.Win32.File ( failIfFalseWithRetry_ )

#include "windows_cconv.h"


type SymbolicLinkFlags = DWORD

sYMBOLIC_LINK_FLAG_FILE       :: SymbolicLinkFlags
sYMBOLIC_LINK_FLAG_FILE       =  0
sYMBOLIC_LINK_FLAG_DIRECTORY  :: SymbolicLinkFlags
sYMBOLIC_LINK_FLAG_DIRECTORY  =  1

{-# LINE 35 "libraries\\Win32\\System\\Win32\\SymbolicLink.hsc" #-}

-- | createSymbolicLink* functions don't check that file is exist or not.

--

-- NOTE: createSymbolicLink* functions are /flipped arguments/ to provide compatiblity for Unix,

-- except 'createSymbolicLink''.

-- 

-- If you want to create symbolic link by Windows way, use 'createSymbolicLink'' instead.

createSymbolicLink :: FilePath -- ^ Target file path

                   -> FilePath -- ^ Symbolic link name

                   -> SymbolicLinkFlags -> IO ()
createSymbolicLink = flip createSymbolicLink'

createSymbolicLinkFile :: FilePath -> FilePath -> IO ()
createSymbolicLinkFile target link = createSymbolicLink' link target sYMBOLIC_LINK_FLAG_FILE

createSymbolicLinkDirectory :: FilePath -> FilePath -> IO ()
createSymbolicLinkDirectory target link = createSymbolicLink' link target sYMBOLIC_LINK_FLAG_DIRECTORY

createSymbolicLink' :: FilePath -- ^ Symbolic link name

                    -> FilePath -- ^ Target file path

                    -> SymbolicLinkFlags -> IO ()
createSymbolicLink' link target flag = do
    withTString link $ \c_link ->
      withTString target $ \c_target ->
        failIfFalseWithRetry_ (unwords ["CreateSymbolicLink",show link,show target]) $
          c_CreateSymbolicLink c_link c_target flag

foreign import WINDOWS_CCONV unsafe "windows.h CreateSymbolicLinkW"
  c_CreateSymbolicLink :: LPTSTR -> LPTSTR -> SymbolicLinkFlags -> IO BOOL