-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.8 2000/11/17 13:33:17 sewardj Exp $
+-- $Id: DriverUtil.hs,v 1.11 2000/11/20 16:28:29 simonmar Exp $
--
-- Utils for the driver
--
#include "HsVersions.h"
-import Config
import Util
import IOExts
exitWith ExitSuccess
where
dump "" = return ()
- dump ('$':'$':s) = hPutStr stderr get_prog_name >> dump s
+ dump ('$':'$':s) = hPutStr stderr prog_name >> dump s
dump (c:s) = hPutChar stderr c >> dump s
data BarfKind
| 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!
+prog_name = unsafePerformIO (getProgName)
+{-# NOINLINE prog_name #-}
instance Show BarfKind where
- showsPrec _ e = showString get_prog_name . showString ": " . showBarf e
+ 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"
+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 []
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
+splitFilename f = split_longest_prefix f '.'
-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy", ".ext")
splitFilename3 :: String -> (String,String,String)
splitFilename3 str
- = let dir = getdir str
- (name, ext) = splitFilename (drop (length dir) str)
- in (dir, name, ext)
+ = let (dir, rest) = split_longest_prefix str '/'
+ (name, ext) = splitFilename rest
+ real_dir | null dir = "."
+ | otherwise = dir
+ in (real_dir, name, ext)
remove_suffix :: Char -> String -> String
remove_suffix c s
take_longest_prefix s c = reverse pre
where (_suf,pre) = break (==c) (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
+ = case pre of
+ [] -> ([], reverse suf)
+ (_:pre) -> (reverse pre, reverse suf)
+ where (suf,pre) = break (==c) (reverse s)
+
newsuf :: String -> String -> String
newsuf suf s = remove_suffix '.' s ++ suf