-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.1 2000/10/11 11:54:58 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.27 2001/08/16 11:06:10 simonmar Exp $
--
-- Utils for the driver
--
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 RegexString
+import Directory ( getDirectoryContents )
import IO
-import System
-import Directory
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)
-
-get_prog_name = unsafePerformIO (readIORef prog_name) -- urk!
+ 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
+ -> do rest <- look h
+ return (words opts ++ rest)
+ | otherwise -> return []
+
+optionRegex = mkRegex "\\{-#[ \t]+OPTIONS[ \t]+(.*)#-\\}" -- -}
-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))
+-----------------------------------------------------------------------------
+-- A version of getDirectoryContents that is non-fatal if the
+-- directory doesn't exist.
-barfKindTc = mkTyCon "BarfKind"
-instance Typeable BarfKind where
- typeOf _ = mkAppTy barfKindTc []
+softGetDirectoryContents d
+ = IO.catch (getDirectoryContents d)
+ (\_ -> do hPutStrLn stderr
+ ("WARNING: error while reading directory " ++ d)
+ return []
+ )
-----------------------------------------------------------------------------
--- 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))
+
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
-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]
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")
+splitFilename3 :: String -> (String,String,Suffix)
+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 -> Suffix
remove_suffix c s
| null pre = reverse suf
| otherwise = reverse pre
take_longest_prefix s c = reverse pre
where (_suf,pre) = break (==c) (reverse s)
-newsuf :: String -> String -> String
+-- 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 -> Suffix -> String
newsuf suf s = remove_suffix '.' s ++ suf
-- getdir strips the filename off the input string, returning the directory.
remove_spaces :: String -> String
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
-booter_version
- = case "\
- \ __GLASGOW_HASKELL__" of
- ' ':n:ns -> n:'.':ns
- ' ':m -> m
projects / ghc-hetmet.git / blobdiff