-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.2 2000/10/11 14:08:52 simonmar 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
import IO
import System
-import Directory
import List
import Char
import Monad
short_usage = "Usage: For basic information, try the `--help' option."
-GLOBAL_VAR(path_usage, "", String)
+GLOBAL_VAR(v_Path_usage, "", String)
long_usage = do
- usage_path <- readIORef path_usage
+ 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 ('$':'$':s) = hPutStr stderr prog_name >> dump s
dump (c:s) = hPutChar stderr c >> dump s
-version_str = cProjectVersion
-
data BarfKind
= PhaseFailed String ExitCode
| Interrupted
| OtherError String -- just prints the error message
deriving Eq
-GLOBAL_VAR(prog_name, "ghc", String)
-
-get_prog_name = unsafePerformIO (readIORef 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 []
xs <- readIORef var
unless (x `elem` xs) $ writeIORef var (x:xs)
+splitFilename :: String -> (String,String)
+splitFilename f = split_longest_prefix f '.'
+
+-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy", ".ext")
+splitFilename3 :: String -> (String,String,String)
+splitFilename3 str
+ = 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
| null pre = reverse suf
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
remove_spaces :: String -> String
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
-
-booter_version
- = case "\
- \ __GLASGOW_HASKELL__" of
- ' ':n:ns -> n:'.':ns
- ' ':m -> m
-