-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.21 2001/05/08 10:58:48 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.29 2002/01/22 14:47:52 simonmar Exp $
--
-- Utils for the driver
--
import Util
import Panic
+import Config ( cLeadingUnderscore )
import IOExts
import Exception
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
-> IO [String] -- options, if any
getOptionsFromSource file
= do h <- openFile file ReadMode
- catchJust ioErrors (look h)
+ catchJust ioErrors (look h `finally` hClose h)
(\e -> if isEOFError e then return [] else ioError e)
where
look h = do
- l <- hGetLine h
+ l' <- hGetLine h
+ let l = remove_spaces l'
case () of
() | null l -> look h
| prefixMatch "#" l -> look h
softGetDirectoryContents d
= IO.catch (getDirectoryContents d)
- (\_ -> do hPutStr stderr
+ (\_ -> do hPutStrLn stderr
("WARNING: error while reading directory " ++ d)
return []
)
-----------------------------------------------------------------------------
+-- Prefixing underscore to linker-level names
+prefixUnderscore :: String -> String
+prefixUnderscore
+ | cLeadingUnderscore == "YES" = ('_':)
+ | otherwise = id
+
+-----------------------------------------------------------------------------
-- Utils
unknownFlagErr :: String -> a
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)
-splitFilename f = split_longest_prefix f '.'
+------------------------------------------------------
+-- Filename manipulation
+------------------------------------------------------
+
+type Suffix = String
+
+splitFilename :: String -> (String,Suffix)
+splitFilename f = split_longest_prefix f (=='.')
-getFileSuffix :: String -> String
-getFileSuffix f = drop_longest_prefix f '.'
+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 '/'
+ = let (dir, rest) = split_longest_prefix str isPathSeparator
(name, ext) = splitFilename rest
real_dir | null dir = "."
| 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
where (suf,pre) = break (==c) (reverse s)
-drop_longest_prefix :: String -> Char -> String
-drop_longest_prefix s c = reverse suf
- where (suf,_pre) = break (==c) (reverse s)
+drop_longest_prefix :: String -> (Char -> Bool) -> String
+drop_longest_prefix s pred = reverse suf
+ where (suf,_pre) = break pred (reverse s)
-take_longest_prefix :: String -> Char -> String
-take_longest_prefix s c = reverse pre
- where (_suf,pre) = break (==c) (reverse s)
+take_longest_prefix :: String -> (Char -> Bool) -> String
+take_longest_prefix s pred = reverse pre
+ where (_suf,pre) = break pred (reverse s)
--- split a string at the last occurence of 'c', returning the two
--- parts of the string with the 'c' removed. If the string contains
--- no 'c's, the entire string is returned in the second component.
-split_longest_prefix :: String -> Char -> (String,String)
-split_longest_prefix s c
+-- split a string at the last character where 'pred' is True,
+-- returning a pair of strings. The first component holds the string
+-- up (but not including) the last character for which 'pred' returned
+-- True, the second whatever comes after (but also not including the
+-- last character).
+--
+-- If 'pred' returns False for all characters in the string, the original
+-- string is returned in the second component (and the first one is just
+-- empty).
+split_longest_prefix :: String -> (Char -> Bool) -> (String,String)
+split_longest_prefix s pred
= case pre of
[] -> ([], reverse suf)
(_:pre) -> (reverse pre, reverse suf)
- where (suf,pre) = break (==c) (reverse s)
+ where (suf,pre) = break pred (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.
getdir :: String -> String
getdir s = if null dir then "." else init dir
- where dir = take_longest_prefix s '/'
+ where dir = take_longest_prefix s isPathSeparator
newdir :: String -> String -> String
-newdir dir s = dir ++ '/':drop_longest_prefix s '/'
+newdir dir s = dir ++ '/':drop_longest_prefix s isPathSeparator
remove_spaces :: String -> String
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
+isPathSeparator :: Char -> Bool
+isPathSeparator ch =
+#ifdef mingw32_TARGET_OS
+ ch == '/' || ch == '\\'
+#else
+ ch == '/'
+#endif
projects / ghc-hetmet.git / blobdiff