X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FDriverUtil.hs;h=f759f8b196f37854f350ecb4a0c19e9da9fc9aa0;hb=0f0e83390daf09bceb7ed0be5b280f3c662c02a8;hp=9a92b83ade9a16c4bfead2bdaee10835813a3174;hpb=6ef5df4a1bc630798e0de5e676afe11086b68606;p=ghc-hetmet.git

diff --git a/ghc/compiler/main/DriverUtil.hs b/ghc/compiler/main/DriverUtil.hs
index 9a92b83..f759f8b 100644
--- a/ghc/compiler/main/DriverUtil.hs
+++ b/ghc/compiler/main/DriverUtil.hs
@@ -1,5 +1,5 @@
 -----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.5 2000/10/27 13:50:25 sewardj Exp $
+-- $Id: DriverUtil.hs,v 1.46 2004/11/09 16:59:31 simonmar Exp $
 --
 -- Utils for the driver
 --
@@ -7,114 +7,130 @@
 --
 -----------------------------------------------------------------------------
 
-module DriverUtil where
-
+module DriverUtil (
+	getOptionsFromSource, softGetDirectoryContents,
+	createDirectoryHierarchy, doesDirNameExist, prefixUnderscore,
+	unknownFlagErr, unknownFlagsErr, missingArgErr, 
+	later, handleDyn, handle,
+	split, add, addNoDups, 
+	Suffix, splitFilename, getFileSuffix,
+	splitFilename3, remove_suffix, split_longest_prefix,
+	replaceFilenameSuffix, directoryOf, filenameOf,
+	replaceFilenameDirectory, remove_spaces, escapeSpaces,
+  ) where
+
+#include "../includes/ghcconfig.h"
 #include "HsVersions.h"
 
-import Config
 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
 import IO
-import System
 import List
 import Char
 import Monad
 
 -----------------------------------------------------------------------------
--- Errors
-
-short_usage = "Usage: For basic information, try the `--help' option."
-   
-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 get_prog_name >> dump s
-     dump (c:s) = hPutChar stderr c >> dump s
-
-version_str = cProjectVersion
-
-data BarfKind
-  = PhaseFailed String ExitCode
-  | Interrupted
-  | UsageError String			-- prints the short usage msg after the error
-  | OtherError String			-- just prints the error message
-  deriving Eq
-
-GLOBAL_VAR(v_Prog_name, "ghc", String)
-
-get_prog_name = unsafePerformIO (readIORef v_Prog_name) -- urk!
-
-instance Show BarfKind where
-  showsPrec _ e = showString get_prog_name . showString ": " . showBarf e
-
-showBarf (UsageError str) = showString str . showChar '\n' . showString short_usage
-showBarf (OtherError str) = showString str
-showBarf (PhaseFailed phase code) = 
-	showString phase . showString " failed, code = " . shows code
-showBarf (Interrupted) = showString "interrupted"
-
-unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
-
-barfKindTc = mkTyCon "BarfKind"
-instance Typeable BarfKind where
-  typeOf _ = mkAppTy barfKindTc []
-
------------------------------------------------------------------------------
 -- Reading OPTIONS pragmas
+
 getOptionsFromSource 
 	:: String		-- input file
 	-> IO [String]		-- options, if any
 getOptionsFromSource file
   = do h <- openFile file ReadMode
-       catchJust ioErrors (look h)
-	  (\e -> if isEOFError e then return [] else ioError e)
+       look h `finally` hClose h
   where
 	look h = do
-	    l <- hGetLine h
-	    case () of
-		() | null l -> look h
-		   | prefixMatch "#" l -> look h
-		   | prefixMatch "{-# LINE" l -> look h   -- -}
-		   | Just (opts:_) <- matchRegex optionRegex l
-			-> return (words opts)
-		   | otherwise -> return []
+	    r <- tryJust ioErrors (hGetLine h)
+	    case r of
+	      Left e | isEOFError e -> return []
+	             | otherwise    -> ioError e
+	      Right l' -> do
+	    	let l = remove_spaces l'
+	    	case () of
+		    () | null l -> look h
+		       | prefixMatch "#" l -> look h
+		       | prefixMatch "{-# LINE" l -> look h   -- -}
+		       | Just opts <- matchOptions l
+		       	-> do rest <- look h
+                              return (words opts ++ rest)
+		       | otherwise -> return []
+
+matchOptions s
+  | Just s1 <- maybePrefixMatch "{-#" s, -- -}
+    Just s2 <- maybePrefixMatch "OPTIONS" (remove_spaces s1),
+    Just s3 <- maybePrefixMatch "}-#" (reverse s2)
+  = Just (reverse s3)
+  | otherwise
+  = Nothing
 
-optionRegex = mkRegex "\\{-#[ \t]+OPTIONS[ \t]+(.*)#-\\}"   -- -}
+-----------------------------------------------------------------------------
+-- A version of getDirectoryContents that is non-fatal if the
+-- directory doesn't exist.
+
+softGetDirectoryContents d
+   = IO.catch (getDirectoryContents d)
+	  (\_ -> do hPutStrLn stderr 
+		          ("WARNING: error while reading directory " ++ d)
+		    return []
+	  )
+
+-----------------------------------------------------------------------------
+-- 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
+ | cLeadingUnderscore == "YES" = ('_':)
+ | otherwise                   = id
 
 -----------------------------------------------------------------------------
 -- Utils
 
-my_partition :: (a -> Maybe b) -> [a] -> ([(a,b)],[a])
-my_partition _ [] = ([],[])
-my_partition p (a:as)
-  = let (bs,cs) = my_partition p as in
-    case p a of
-	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
+unknownFlagErr :: String -> a
+unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
+
+unknownFlagsErr :: [String] -> a
+unknownFlagsErr fs = throwDyn (UsageError ("unrecognised flags: " ++ unwords fs))
+
+missingArgErr :: String -> a
+missingArgErr f = throwDyn (UsageError ("missing argument for flag: " ++ f))
 
 later = flip finally
 
 handleDyn :: Typeable ex => (ex -> IO a) -> IO a -> IO a
 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
 		[]     -> [chunk] 
@@ -131,43 +147,92 @@ addNoDups var x = do
   xs <- readIORef var
   unless (x `elem` xs) $ writeIORef var (x:xs)
 
-splitFilename :: String -> (String,String)
-splitFilename f = (reverse (stripDot rev_basename), reverse rev_ext)
-  where (rev_ext, rev_basename) = span ('.' /=) (reverse f)
-        stripDot ('.':xs) = xs
-        stripDot xs       = xs
-
-remove_suffix :: Char -> String -> String
+------------------------------------------------------
+--		Filename manipulation
+------------------------------------------------------
+		
+type Suffix = String
+
+splitFilename :: String -> (String,Suffix)
+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
+   = 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 -> Suffix
 remove_suffix c s
-  | null pre  = reverse suf
+  | null pre  = s
   | 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)
-
-take_longest_prefix :: String -> Char -> String
-take_longest_prefix s c = reverse pre
-  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)
 
-newsuf :: String -> String -> String
-newsuf suf s = remove_suffix '.' s ++ suf
+take_longest_prefix :: String -> (Char -> Bool) -> String
+take_longest_prefix s pred = reverse pre
+  where (_suf,pre) = break pred (reverse s)
 
--- 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 '/'
-
-newdir :: String -> String -> String
-newdir dir s = dir ++ '/':drop_longest_prefix s '/'
+-- 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 pred (reverse s)
+
+replaceFilenameSuffix :: FilePath -> Suffix -> FilePath
+replaceFilenameSuffix s suf = remove_suffix '.' s ++ suf
+
+-- directoryOf strips the filename off the input string, returning
+-- the directory.
+directoryOf :: FilePath -> String
+directoryOf = fst . splitFilenameDir
+
+-- filenameOf strips the directory off the input string, returning
+-- the filename.
+filenameOf :: FilePath -> String
+filenameOf = snd . splitFilenameDir
+
+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
 
-booter_version
- = case "\ 
-	\ __GLASGOW_HASKELL__" of
-    ' ':n:ns -> n:'.':ns
-    ' ':m    -> m
+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
+  ch == '/' || ch == '\\'
+#else
+  ch == '/'
+#endif