add getDiskSize

Couldn't find anything that exposed this for Windows.
This commit is contained in:
Joey Hess 2014-01-22 22:19:52 -04:00
parent ed7c61914c
commit 85aae97b63
2 changed files with 51 additions and 14 deletions

View file

@ -1,13 +1,16 @@
{- disk free space checking
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
- Copyright 2012, 2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE ForeignFunctionInterface, CPP #-}
module Utility.DiskFree ( getDiskFree ) where
module Utility.DiskFree (
getDiskFree,
getDiskSize
) where
#ifdef WITH_CLIBS
@ -20,9 +23,12 @@ import Foreign.C.Error
foreign import ccall safe "libdiskfree.h diskfree" c_diskfree
:: CString -> IO CULLong
getDiskFree :: FilePath -> IO (Maybe Integer)
getDiskFree path = withFilePath path $ \c_path -> do
free <- c_diskfree c_path
foreign import ccall safe "libdiskfree.h disksize" c_disksize
:: CString -> IO CULLong
getVal :: (CString -> IO CULLong) -> FilePath -> IO (Maybe Integer)
getVal getter path = withFilePath path $ \c_path -> do
free <- getter c_path
ifM (safeErrno <$> getErrno)
( return $ Just $ toInteger free
, return Nothing
@ -30,6 +36,12 @@ getDiskFree path = withFilePath path $ \c_path -> do
where
safeErrno (Errno v) = v == 0
getDiskFree :: FilePath -> IO (Maybe Integer)
getDiskFree = getVal c_diskfree
getDiskSize :: FilePath -> IO (Maybe Integer)
getDiskSize = getVal c_disksize
#else
#ifdef mingw32_HOST_OS
@ -41,6 +53,9 @@ getDiskFree :: FilePath -> IO (Maybe Integer)
getDiskFree path = catchMaybeIO $ do
(sectors, bytes, nfree, _ntotal) <- getDiskFreeSpace (Just path)
return $ toInteger sectors * toInteger bytes * toInteger nfree
getDiskSize :: FilePath -> IO (Maybe Integer)
getDiskSize _ = return Nothing
#else
#warning Building without disk free space checking support
@ -48,5 +63,8 @@ getDiskFree path = catchMaybeIO $ do
getDiskFree :: FilePath -> IO (Maybe Integer)
getDiskFree _ = return Nothing
getDiskSize :: FilePath -> IO (Maybe Integer)
getDiskSize _ = return Nothing
#endif
#endif