    {-# LANGUAGE CPP #-}
    {-# LANGUAGE Safe #-}
    {-
    Copyright (c) 2005-2011 John Goerzen <jgoerzen@complete.org>

    All rights reserved.

    For license and copyright information, see the file LICENSE
    -}

    {- |
       Module     : System.IO.StatCompat
       Copyright  : Copyright (C) 2005-2011 John Goerzen
       License    : BSD3

       Maintainer : John Goerzen <jgoerzen@complete.org>
       Stability  : provisional
       Portability: portable

    Provide a stat-like structure for use in MissingH.  Especially
    useful with HVFS and on Windows.  See also "System.IO.WindowsCompat".

    -}

    module System.IO.StatCompat
    where
    import System.Posix.Types
    import System.Posix.Consts
    #if !(defined(mingw32_HOST_OS) || defined(mingw32_TARGET_OS) || defined(__MINGW32__))
    import System.Posix.Files(intersectFileModes)
    #endif
    import Data.Bits ((.&.))

    #if (defined(mingw32_HOST_OS) || defined(mingw32_TARGET_OS) || defined(__MINGW32__))
    type LinkCount = Int
    type UserID = Int
    type GroupID = Int
    #endif

    data FileStatusCompat =
        FileStatusCompat {deviceID :: DeviceID,
                          fileID :: FileID,
                          fileMode :: FileMode,
                          linkCount :: LinkCount,
                          fileOwner :: UserID,
                          fileGroup :: GroupID,
                          specialDeviceID :: DeviceID,
                          fileSize :: FileOffset,
                          accessTime :: EpochTime,
                          modificationTime :: EpochTime,
                          statusChangeTime :: EpochTime
                         }

    sc_helper :: FileMode -> FileStatusCompat -> Bool
    sc_helper comp stat =
        (fileMode stat `intersectFileModes` fileTypeModes) == comp

    isBlockDevice,isCharacterDevice,isNamedPipe,isRegularFile,isDirectory,isSymbolicLink,isSocket :: FileStatusCompat -> Bool
    isBlockDevice = sc_helper blockSpecialMode
    isCharacterDevice = sc_helper characterSpecialMode
    isNamedPipe = sc_helper namedPipeMode
    isRegularFile = sc_helper regularFileMode
    isDirectory = sc_helper directoryMode
    isSymbolicLink = sc_helper symbolicLinkMode
    isSocket = sc_helper socketMode

    #if (defined(mingw32_HOST_OS) || defined(mingw32_TARGET_OS) || defined(__MINGW32__))
    intersectFileModes :: FileMode -> FileMode -> FileMode
    intersectFileModes m1 m2 = m1 .&. m2
    #endif