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|
{- File size.
-
- Copyright 2015-2020 Joey Hess <id@joeyh.name>
-
- License: BSD-2-clause
-}
{-# LANGUAGE CPP #-}
{-# OPTIONS_GHC -fno-warn-tabs #-}
module Utility.FileSize (
FileSize,
getFileSize,
getFileSize',
) where
#ifdef mingw32_HOST_OS
import Control.Exception (bracket)
import System.IO
import qualified Utility.FileIO as F
#else
import System.PosixCompat.Files (fileSize)
import qualified Utility.RawFilePath as R
#endif
import System.PosixCompat.Files (FileStatus)
import Utility.OsPath
type FileSize = Integer
{- Gets the size of a file.
-
- This is better than using fileSize, because on Windows that returns a
- FileOffset which maxes out at 2 gb.
- See https://github.com/jystic/unix-compat/issues/16
-}
getFileSize :: OsPath -> IO FileSize
#ifndef mingw32_HOST_OS
getFileSize f = fmap (fromIntegral . fileSize) (R.getFileStatus (fromOsPath f))
#else
getFileSize f = bracket (F.openFile f ReadMode) hClose hFileSize
#endif
{- Gets the size of the file, when its FileStatus is already known.
-
- On windows, uses getFileSize. Otherwise, the FileStatus contains the
- size, so this does not do any work. -}
getFileSize' :: OsPath -> FileStatus -> IO FileSize
#ifndef mingw32_HOST_OS
getFileSize' _ s = return $ fromIntegral $ fileSize s
#else
getFileSize' f _ = getFileSize f
#endif
|
