-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.10 2000/11/20 15:40:54 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.38 2003/06/04 15:47:59 simonmar Exp $
--
-- Utils for the driver
--
module DriverUtil where
+#include "../includes/config.h"
#include "HsVersions.h"
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 prog_name >> dump s
- dump (c:s) = hPutChar stderr c >> dump s
-
-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
-
-prog_name = unsafePerformIO (getProgName)
-{-# NOINLINE prog_name #-}
-
-instance Show BarfKind where
- showsPrec _ e = showString 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"
-{-# NOINLINE barfKindTc #-}
-instance Typeable BarfKind where
- typeOf _ = mkAppTy barfKindTc []
-
------------------------------------------------------------------------------
-- Reading OPTIONS pragmas
getOptionsFromSource
-> 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
| prefixMatch "{-# LINE" l -> look h -- -}
- | Just (opts:_) <- matchRegex optionRegex l
- -> return (words opts)
+ | Just opts <- matchOptions l
+ -> do rest <- look h
+ return (words opts ++ rest)
| otherwise -> return []
-optionRegex = mkRegex "\\{-#[ \t]+OPTIONS[ \t]+(.*)#-\\}" -- -}
+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
+
+-----------------------------------------------------------------------------
+-- 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
+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)
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 :: 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]
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
+------------------------------------------------------
+-- 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,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 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 '/'
+-- 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 '/'
+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
+ ch == '/' || ch == '\\'
+#else
+ ch == '/'
+#endif
projects / ghc-hetmet.git / blobdiff