-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.21 2001/05/08 10:58:48 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.24 2001/06/14 12:50:06 simonpj Exp $
--
-- Utils for the driver
--
import Directory ( getDirectoryContents )
import IO
-import System
import List
import Char
import Monad
+
-----------------------------------------------------------------------------
-- Errors
-GLOBAL_VAR(v_Path_usage, "", String)
-
-long_usage = do
- usage_path <- readIORef v_Path_usage
- usage <- readFile usage_path
- dump usage
- exitWith ExitSuccess
- where
- dump "" = return ()
- dump ('$':'$':s) = hPutStr stderr progName >> dump s
- dump (c:s) = hPutChar stderr c >> dump s
-
-----------------------------------------------------------------------------
-- Reading OPTIONS pragmas
Just b -> ((a,b):bs,cs)
my_prefix_match :: String -> String -> Maybe String
-my_prefix_match [] rest = Just rest
-my_prefix_match (_:_) [] = Nothing
+my_prefix_match [] rest = Just rest
+my_prefix_match (_:_) [] = Nothing
my_prefix_match (p:pat) (r:rest)
| p == r = my_prefix_match pat rest
| otherwise = Nothing
handleDyn = flip catchDyn
handle :: (Exception -> IO a) -> IO a -> IO a
+#if __GLASGOW_HASKELL__ < 501
handle = flip Exception.catchAllIO
+#else
+handle h f = f `Exception.catch` \e -> case e of
+ ExitException _ -> throw e
+ _ -> h e
+#endif
split :: Char -> String -> [String]
split c s = case rest of
xs <- readIORef var
unless (x `elem` xs) $ writeIORef var (x:xs)
-splitFilename :: String -> (String,String)
+------------------------------------------------------
+-- Filename manipulation
+------------------------------------------------------
+
+type Suffix = String
+
+splitFilename :: String -> (String,Suffix)
splitFilename f = split_longest_prefix f '.'
-getFileSuffix :: String -> String
+getFileSuffix :: String -> Suffix
getFileSuffix f = drop_longest_prefix f '.'
-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy", ".ext")
-splitFilename3 :: String -> (String,String,String)
+splitFilename3 :: String -> (String,String,Suffix)
splitFilename3 str
= let (dir, rest) = split_longest_prefix str '/'
(name, ext) = splitFilename rest
| otherwise = dir
in (real_dir, name, ext)
-remove_suffix :: Char -> String -> String
+remove_suffix :: Char -> String -> Suffix
remove_suffix c s
| null pre = reverse suf
| otherwise = reverse pre
(_:pre) -> (reverse pre, reverse suf)
where (suf,pre) = break (==c) (reverse s)
-newsuf :: String -> String -> String
+newsuf :: String -> Suffix -> String
newsuf suf s = remove_suffix '.' s ++ suf
-- getdir strips the filename off the input string, returning the directory.
remove_spaces :: String -> String
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
+