[project @ 2003-10-10 09:39:33 by simonpj]

[ghc-hetmet.git] / ghc / compiler / main / DriverUtil.hs

diff --git a/ghc/compiler/main/DriverUtil.hs b/ghc/compiler/main/DriverUtil.hs
index 0be0937..d8fe68c 100644 (file)
--- a/ghc/compiler/main/DriverUtil.hs
+++ b/ghc/compiler/main/DriverUtil.hs
@@ -1,5 +1,5 @@
 -----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.29 2002/01/22 14:47:52 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.39 2003/08/20 15:07:57 simonmar Exp $
 --
 -- Utils for the driver
 --
@@ -16,21 +16,17 @@ import Util
 import Panic
 import Config          ( cLeadingUnderscore )
 
-import IOExts
-import Exception
-import Dynamic
-import RegexString
+import EXCEPTION       ( Exception(..), finally, throwDyn, catchDyn, throw )
+import qualified EXCEPTION as Exception
+import DYNAMIC
+import DATA_IOREF      ( IORef, readIORef, writeIORef )
 
-import Directory       ( getDirectoryContents )
+import Directory
 import IO
 import List
 import Char
 import Monad
 
-
------------------------------------------------------------------------------
--- Errors
-
 -----------------------------------------------------------------------------
 -- Reading OPTIONS pragmas
 
@@ -49,12 +45,18 @@ getOptionsFromSource file
                () | null l -> look h
                   | prefixMatch "#" l -> look h
                   | prefixMatch "{-# LINE" l -> look h   -- -}
-                  | Just (opts:_) <- matchRegex optionRegex l
+                  | Just opts <- matchOptions l
                        -> do rest <- look h
                               return (words opts ++ rest)
                   | otherwise -> return []
 
-optionRegex = mkRegex "\\{-#[ \t]+OPTIONS[ \t]+(.*)#-\\}"   -- -}
+matchOptions s
+  | Just s1 <- maybePrefixMatch "{-#" s, -- -}
+    Just s2 <- maybePrefixMatch "OPTIONS" (remove_spaces s1),
+    Just s3 <- maybePrefixMatch "}-#" (reverse s2)
+  = Just (reverse s3)
+  | otherwise
+  = Nothing
 
 -----------------------------------------------------------------------------
 -- A version of getDirectoryContents that is non-fatal if the
@@ -68,6 +70,22 @@ softGetDirectoryContents d
          )
 
 -----------------------------------------------------------------------------
+-- Create a hierarchy of directories
+
+createDirectoryHierarchy :: FilePath -> IO ()
+createDirectoryHierarchy dir = do
+  b <- doesDirectoryExist dir
+  when (not b) $ do
+       createDirectoryHierarchy (directoryOf dir)
+       createDirectory dir
+
+-----------------------------------------------------------------------------
+-- Verify that the 'dirname' portion of a FilePath exists.
+-- 
+doesDirNameExist :: FilePath -> IO Bool
+doesDirNameExist fpath = doesDirectoryExist (directoryOf fpath)
+
+-----------------------------------------------------------------------------
 -- Prefixing underscore to linker-level names
 prefixUnderscore :: String -> String
 prefixUnderscore
@@ -80,6 +98,9 @@ prefixUnderscore
 unknownFlagErr :: String -> a
 unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
 
+unknownFlagsErr :: [String] -> a
+unknownFlagsErr fs = throwDyn (UsageError ("unrecognised flags: " ++ unwords fs))
+
 my_partition :: (a -> Maybe b) -> [a] -> ([(a,b)],[a])
 my_partition _ [] = ([],[])
 my_partition p (a:as)
@@ -88,13 +109,6 @@ my_partition p (a:as)
        Nothing -> (bs,a:cs)
        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 (p:pat) (r:rest)
-  | p == r    = my_prefix_match pat rest
-  | otherwise = Nothing
-
 later = flip finally
 
 handleDyn :: Typeable ex => (ex -> IO a) -> IO a -> IO a
@@ -137,6 +151,14 @@ splitFilename f = split_longest_prefix f (=='.')
 getFileSuffix :: String -> Suffix
 getFileSuffix f = drop_longest_prefix f (=='.')
 
+-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy.ext")
+splitFilenameDir :: String -> (String,String)
+splitFilenameDir str
+  = let (dir, rest) = split_longest_prefix str isPathSeparator
+       real_dir | null dir  = "."
+                | otherwise = dir
+    in  (real_dir, rest)
+
 -- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy", ".ext")
 splitFilename3 :: String -> (String,String,Suffix)
 splitFilename3 str
@@ -176,20 +198,24 @@ split_longest_prefix s pred
        (_:pre) -> (reverse pre, reverse suf)
   where (suf,pre) = break pred (reverse s)
 
-newsuf :: String -> Suffix -> String
-newsuf suf s = remove_suffix '.' s ++ suf
+replaceFilenameSuffix :: FilePath -> Suffix -> FilePath
+replaceFilenameSuffix s suf = 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 isPathSeparator
+-- directoryOf strips the filename off the input string, returning
+-- the directory.
+directoryOf :: FilePath -> String
+directoryOf = fst . splitFilenameDir
 
-newdir :: String -> String -> String
-newdir dir s = dir ++ '/':drop_longest_prefix s isPathSeparator
+replaceFilenameDirectory :: FilePath -> String -> FilePath
+replaceFilenameDirectory s dir
+ = dir ++ '/':drop_longest_prefix s isPathSeparator
 
 remove_spaces :: String -> String
 remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
 
+escapeSpaces :: String -> String
+escapeSpaces = foldr (\c s -> if isSpace c then '\\':c:s else c:s) ""
+
 isPathSeparator :: Char -> Bool
 isPathSeparator ch =
 #ifdef mingw32_TARGET_OS