X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FDriverUtil.hs;h=4932b9e48e132012e942c9525c04e57e04694591;hb=70b6c54b3c140d96b69287f8f400f88a0b7e9c18;hp=75cda59078755ecc00c5431651b318239c2691d8;hpb=60bf710865eff2ac5a497aad66c2bccc66a70215;p=ghc-hetmet.git

diff --git a/ghc/compiler/main/DriverUtil.hs b/ghc/compiler/main/DriverUtil.hs
index 75cda59..4932b9e 100644
--- a/ghc/compiler/main/DriverUtil.hs
+++ b/ghc/compiler/main/DriverUtil.hs
@@ -1,5 +1,5 @@
 -----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.1 2000/10/11 11:54:58 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.38 2003/06/04 15:47:59 simonmar Exp $
 --
 -- Utils for the driver
 --
@@ -9,93 +9,98 @@
 
 module DriverUtil where
 
+#include "../includes/config.h"
 #include "HsVersions.h"
 
-import Config
 import Util
+import Panic
+import Config		( cLeadingUnderscore )
 
-import IOExts
-import Exception
-import Dynamic
+import EXCEPTION	( Exception(..), finally, throwDyn, catchDyn, throw )
+import qualified EXCEPTION as Exception
+import DYNAMIC
+import DATA_IOREF	( IORef, readIORef, writeIORef )
 
-import IO
-import System
 import Directory
+import IO
 import List
 import Char
 import Monad
 
 -----------------------------------------------------------------------------
--- Errors
-
-short_usage = "Usage: For basic information, try the `--help' option."
-   
-long_usage = do
-  let usage_file = "ghc-usage.txt"
-      usage_path = findFile usage_file (cGHC_DRIVER_DIR ++ '/':usage_file)
-  usage <- readFile usage_path
-  dump usage
-  exitWith ExitSuccess
+-- Reading OPTIONS pragmas
+
+getOptionsFromSource 
+	:: String		-- input file
+	-> IO [String]		-- options, if any
+getOptionsFromSource file
+  = do h <- openFile file ReadMode
+       catchJust ioErrors (look h `finally` hClose h)
+	  (\e -> if isEOFError e then return [] else ioError e)
   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(prog_name, "ghc", String)
+	look h = do
+	    l' <- hGetLine h
+	    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 <- my_prefix_match "{-#" s, -- -}
+    Just s2 <- my_prefix_match "OPTIONS" (remove_spaces s1),
+    Just s3 <- my_prefix_match "}-#" (reverse s2)
+  = Just (reverse s3)
+  | otherwise
+  = Nothing
 
-get_prog_name = unsafePerformIO (readIORef prog_name) -- urk!
+-----------------------------------------------------------------------------
+-- A version of getDirectoryContents that is non-fatal if the
+-- directory doesn't exist.
 
-instance Show BarfKind where
-  showsPrec _ e = showString get_prog_name . showString ": " . showBarf e
+softGetDirectoryContents d
+   = IO.catch (getDirectoryContents d)
+	  (\_ -> do hPutStrLn stderr 
+		          ("WARNING: error while reading directory " ++ d)
+		    return []
+	  )
 
-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"
+-----------------------------------------------------------------------------
+-- Create a hierarchy of directories
 
-unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
+createDirectoryHierarchy :: FilePath -> IO ()
+createDirectoryHierarchy dir = do
+  b <- doesDirectoryExist dir
+  when (not b) $ do
+	createDirectoryHierarchy (directoryOf dir)
+	createDirectory dir
 
-barfKindTc = mkTyCon "BarfKind"
-instance Typeable BarfKind where
-  typeOf _ = mkAppTy barfKindTc []
+-----------------------------------------------------------------------------
+-- Verify that the 'dirname' portion of a FilePath exists.
+-- 
+doesDirNameExist :: FilePath -> IO Bool
+doesDirNameExist fpath = doesDirectoryExist (directoryOf fpath)
 
 -----------------------------------------------------------------------------
--- Finding files in the installation
-
-GLOBAL_VAR(topDir, clibdir, String)
-
-	-- grab the last -B option on the command line, and
-	-- set topDir to its value.
-setTopDir :: [String] -> IO [String]
-setTopDir args = do
-  let (minusbs, others) = partition (prefixMatch "-B") args
-  (case minusbs of
-    []   -> writeIORef topDir clibdir
-    some -> writeIORef topDir (drop 2 (last some)))
-  return others
-
-findFile name alt_path = unsafePerformIO (do
-  top_dir <- readIORef topDir
-  let installed_file = top_dir ++ '/':name
-  let inplace_file   = top_dir ++ '/':cCURRENT_DIR ++ '/':alt_path
-  b <- doesFileExist inplace_file
-  if b  then return inplace_file
-	else return installed_file
- )
+-- Prefixing underscore to linker-level names
+prefixUnderscore :: String -> String
+prefixUnderscore
+ | cLeadingUnderscore == "YES" = ('_':)
+ | otherwise                   = id
 
 -----------------------------------------------------------------------------
 -- Utils
 
+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)
@@ -105,26 +110,26 @@ my_partition p (a:as)
 	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
 
-prefixMatch :: Eq a => [a] -> [a] -> Bool
-prefixMatch [] _str = True
-prefixMatch _pat [] = False
-prefixMatch (p:ps) (s:ss) | p == s    = prefixMatch ps ss
-			  | otherwise = False
-
-postfixMatch :: String -> String -> Bool
-postfixMatch pat str = prefixMatch (reverse pat) (reverse str)
-
 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] 
@@ -141,37 +146,87 @@ addNoDups var x = do
   xs <- readIORef var
   unless (x `elem` xs) $ writeIORef var (x: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
   | 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
+
+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