+{-# OPTIONS -fffi -cpp #-}
+
------------------------------------------------------------------------
--- $Id: Main.hs,v 1.41 2002/10/27 10:38:33 mthomas Exp $
---
-- Program for converting .hsc files to .hs files, by converting the
-- file into a C program which is run to generate the Haskell source.
-- Certain items known only to the C compiler can then be used in
--
-- See the documentation in the Users' Guide for more details.
-#if __GLASGOW_HASKELL__ >= 504
+#if defined(__GLASGOW_HASKELL__) && !defined(BUILD_NHC)
+#include "../../includes/ghcconfig.h"
+#endif
+
+#if __GLASGOW_HASKELL__ >= 504 || __NHC__ >= 114 || __HUGS__
import System.Console.GetOpt
#else
import GetOpt
#endif
-import Config
-import System (getProgName, getArgs, ExitCode(..), exitWith, exitFailure, system)
-import Directory (removeFile)
-import Monad (MonadPlus(..), liftM, liftM2, when, unless)
+import System (getProgName, getArgs, ExitCode(..), exitWith)
+import Directory (removeFile,doesFileExist)
+import Monad (MonadPlus(..), liftM, liftM2, when)
import Char (isAlpha, isAlphaNum, isSpace, isDigit, toUpper, intToDigit, ord)
-import List (intersperse)
-
-#include "../../includes/config.h"
-
-#ifdef mingw32_HOST_OS
--- import Win32DLL
-import Foreign.C.String (CString, peekCString)
-import Foreign.C.Types
-import Foreign.Ptr (nullPtr)
-import Foreign.Marshal.Alloc (mallocBytes, free)
-
-foreign import stdcall "GetModuleHandle" c_GetModuleHandle :: CString -> IO CUInt
-foreign import stdcall "GetModuleFileName" c_GetModuleFilename :: CUInt -> CString -> CUInt -> IO CUInt
-
-ourName :: IO String
-ourName = do h <- c_GetModuleHandle nullPtr
- cstr <- mallocBytes cstr_len
- rv <- c_GetModuleFilename h cstr (CUInt (fromIntegral cstr_len))
- str <- peekCString cstr
- free cstr
- return str
- where cstr_len = 512
+import List (intersperse, isSuffixOf)
+import IO (hPutStr, hPutStrLn, stderr)
+
+#if defined(mingw32_HOST_OS) && !__HUGS__
+import Foreign
+#if __GLASGOW_HASKELL__ >= 504 || __NHC__ >= 114
+import Foreign.C.String
+#else
+import CString
+#endif
+#endif
+
+
+#if __GLASGOW_HASKELL__ >= 604
+import System.Process ( runProcess, waitForProcess )
+import System.IO ( openFile, IOMode(..), hClose )
+#define HAVE_runProcess
+#endif
+
+#if defined(__GLASGOW_HASKELL__) && !defined(BUILD_NHC)
+import Compat.RawSystem ( rawSystem )
+#define HAVE_rawSystem
+#elif __HUGS__ || __NHC__ >= 117
+import System.Cmd ( rawSystem )
+#define HAVE_rawSystem
+#endif
+
+#if !defined(HAVE_runProcess) || !defined(HAVE_rawSystem)
+-- we need system
+#if __HUGS__ || __NHC__ >= 117 || __GLASGOW_HASKELL__ >= 600
+import System.Cmd ( system )
+#else
+import System ( system )
+#endif
#endif
version :: String
-version = "hsc2hs-0.65"
+version = "hsc2hs version 0.66\n"
data Flag
= Help
| Include String
| Define String (Maybe String)
| Output String
+ | Verbose
+
+template_flag :: Flag -> Bool
+template_flag (Template _) = True
+template_flag _ = False
include :: String -> Flag
include s@('\"':_) = Include s
options :: [OptDescr Flag]
options = [
- Option "t" ["template"] (ReqArg Template "FILE") "template file",
- Option "c" ["cc"] (ReqArg Compiler "PROG") "C compiler to use",
- Option "l" ["ld"] (ReqArg Linker "PROG") "linker to use",
- Option "C" ["cflag"] (ReqArg CompFlag "FLAG") "flag to pass to the C compiler",
- Option "I" [] (ReqArg (CompFlag . ("-I"++))
- "DIR") "passed to the C compiler",
- Option "L" ["lflag"] (ReqArg LinkFlag "FLAG") "flag to pass to the linker",
- Option "i" ["include"] (ReqArg include "FILE") "as if placed in the source",
- Option "D" ["define"] (ReqArg define "NAME[=VALUE]") "as if placed in the source",
- Option "o" ["output"] (ReqArg Output "FILE") "name of main output file",
- Option "" ["help"] (NoArg Help) "display this help and exit",
- Option "" ["version"] (NoArg Version) "output version information and exit",
- Option "" ["no-compile"] (NoArg NoCompile) "stop after writing *_hsc_make.c"]
+ Option ['o'] ["output"] (ReqArg Output "FILE")
+ "name of main output file",
+ Option ['t'] ["template"] (ReqArg Template "FILE")
+ "template file",
+ Option ['c'] ["cc"] (ReqArg Compiler "PROG")
+ "C compiler to use",
+ Option ['l'] ["ld"] (ReqArg Linker "PROG")
+ "linker to use",
+ Option ['C'] ["cflag"] (ReqArg CompFlag "FLAG")
+ "flag to pass to the C compiler",
+ Option ['I'] [] (ReqArg (CompFlag . ("-I"++)) "DIR")
+ "passed to the C compiler",
+ Option ['L'] ["lflag"] (ReqArg LinkFlag "FLAG")
+ "flag to pass to the linker",
+ Option ['i'] ["include"] (ReqArg include "FILE")
+ "as if placed in the source",
+ Option ['D'] ["define"] (ReqArg define "NAME[=VALUE]")
+ "as if placed in the source",
+ Option [] ["no-compile"] (NoArg NoCompile)
+ "stop after writing *_hsc_make.c",
+ Option ['v'] ["verbose"] (NoArg Verbose)
+ "dump commands to stderr",
+ Option ['?'] ["help"] (NoArg Help)
+ "display this help and exit",
+ Option ['V'] ["version"] (NoArg Version)
+ "output version information and exit" ]
+
main :: IO ()
main = do
- prog <- getProgName
- let header = "Usage: "++prog++" [OPTIONS] INPUT.hsc [...]"
+ prog <- getProgramName
+ let header = "Usage: "++prog++" [OPTIONS] INPUT.hsc [...]\n"
args <- getArgs
- let opts@(flags, files, errs) = getOpt Permute options args
-#ifdef mingw32_HOST_OS
- n <- ourName
- let tempName = reverse (drop (length "\\bin\\hsc2hs.exe") (reverse n)) ++ "\\template-hsc.h"
- let fflags = if [t | Template t <- flags] /= [] then flags else (Template tempName) : flags
- let opts = (fflags, files, errs)
+ let (flags, files, errs) = getOpt Permute options args
+
+ -- If there is no Template flag explicitly specified, try
+ -- to find one by looking near the executable. This only
+ -- works on Win32 or Hugs (getExecDir). On Unix, there's a wrapper
+ -- script which specifies an explicit template flag.
+ flags_w_tpl <- if any template_flag flags then
+ return flags
+ else
+#ifdef __HUGS__
+ do mb_path <- getExecDir "/Main.hs"
+#else
+ do mb_path <- getExecDir "/bin/hsc2hs.exe"
#endif
- case opts of
- (flags, _, _)
- | any isHelp flags -> putStrLn (usageInfo header options)
- | any isVersion flags -> putStrLn version
+ add_opt <-
+ case mb_path of
+ Nothing -> return id
+ Just path -> do
+ let templ = path ++ "/template-hsc.h"
+ flg <- doesFileExist templ
+ if flg
+ then return ((Template templ):)
+ else return id
+ return (add_opt flags)
+ case (files, errs) of
+ (_, _)
+ | any isHelp flags_w_tpl -> bye (usageInfo header options)
+ | any isVersion flags_w_tpl -> bye version
where
isHelp Help = True; isHelp _ = False
isVersion Version = True; isVersion _ = False
- (_, [], []) -> putStrLn (prog++": No input files")
- (flags, files, []) -> mapM_ (processFile flags) files
- (_, _, errs) -> do
- mapM_ putStrLn errs
- putStrLn (usageInfo header options)
- exitFailure
+ ((_:_), []) -> mapM_ (processFile flags_w_tpl) files
+ (_, _ ) -> die (concat errs ++ usageInfo header options)
+
+getProgramName :: IO String
+getProgramName = liftM (`withoutSuffix` "-bin") getProgName
+ where str `withoutSuffix` suff
+ | suff `isSuffixOf` str = take (length str - length suff) str
+ | otherwise = str
+
+bye :: String -> IO a
+bye s = putStr s >> exitWith ExitSuccess
+
+die :: String -> IO a
+die s = hPutStr stderr s >> exitWith (ExitFailure 1)
processFile :: [Flag] -> String -> IO ()
processFile flags name
case parser of
Parser p -> case p (SourcePos file_name 1) s of
Success _ _ _ toks -> output flags file_name toks
- Failure (SourcePos name' line) msg -> do
- putStrLn (name'++":"++show line++": "++msg)
- exitFailure
-
-------------------------------------------------------------------------
--- Convert paths foo/baz to foo\baz on Windows
-
-#if defined(mingw32_HOST_OS)
-subst a b ls = map (\ x -> if x == a then b else x) ls
-dosifyPath xs = subst '/' '\\' xs
-#else
-dosifyPath xs = xs
-#endif
+ Failure (SourcePos name' line) msg ->
+ die (name'++":"++show line++": "++msg++"\n")
------------------------------------------------------------------------
-- A deterministic parser which remembers the text which has been parsed.
output flags name toks = do
(outName, outDir, outBase) <- case [f | Output f <- flags] of
- []
- | not (null ext) &&
- last ext == 'c' -> return (dir++base++init ext, dir, base)
- | ext == ".hs" -> return (dir++base++"_out.hs", dir, base)
- | otherwise -> return (dir++base++".hs", dir, base)
- where
- (dir, file) = splitName name
- (base, ext) = splitExt file
+ [] -> if not (null ext) && last ext == 'c'
+ then return (dir++base++init ext, dir, base)
+ else
+ if ext == ".hs"
+ then return (dir++base++"_out.hs", dir, base)
+ else return (dir++base++".hs", dir, base)
+ where
+ (dir, file) = splitName name
+ (base, ext) = splitExt file
[f] -> let
(dir, file) = splitName f
(base, _) = splitExt file
let cProgName = outDir++outBase++"_hsc_make.c"
oProgName = outDir++outBase++"_hsc_make.o"
- progName = outDir++outBase++"_hsc_make" ++ progNameSuffix
+ progName = outDir++outBase++"_hsc_make"
+#if defined(mingw32_HOST_OS) || defined(__CYGWIN32__)
+-- This is a real hack, but the quoting mechanism used for calling the C preprocesseor
+-- via GHC has changed a few times, so this seems to be the only way... :-P * * *
+ ++ ".exe"
+#endif
outHFile = outBase++"_hsc.h"
outHName = outDir++outHFile
outCName = outDir++outBase++"_hsc.c"
+
+ beVerbose = any (\ x -> case x of { Verbose -> True; _ -> False}) flags
let execProgName
- | null outDir = '.':pathSep:progName
+ | null outDir = dosifyPath ("./" ++ progName)
| otherwise = progName
let specials = [(pos, key, arg) | Special pos key arg <- toks]
where
fixChar c | isAlphaNum c = toUpper c
| otherwise = '_'
-
+
+#ifdef __HUGS__
compiler <- case [c | Compiler c <- flags] of
- [] -> return "ghc"
+ [] -> return "gcc"
[c] -> return c
_ -> onlyOne "compiler"
linker <- case [l | Linker l <- flags] of
- [] -> return cGCC
+ [] -> return compiler
[l] -> return l
_ -> onlyOne "linker"
+#else
+ -- Try locating GHC..on Win32, look in the vicinity of hsc2hs.
+ -- Returns a native-format path
+ locateGhc def = do
+ mb <- getExecDir "bin/hsc2hs.exe"
+ case mb of
+ Nothing -> return def
+ Just x -> do
+ let ghc_path = dosifyPath (x ++ "bin/ghc.exe")
+ flg <- doesFileExist ghc_path
+ if flg
+ then return ghc_path
+ else return def
+
+ -- On a Win32 installation we execute the hsc2hs binary directly,
+ -- with no --cc flags, so we'll call locateGhc here, which will
+ -- succeed, via getExecDir.
+ --
+ -- On a Unix installation, we'll run the wrapper script hsc2hs.sh
+ -- (called plain hsc2hs in the installed tree), which will pass
+ -- a suitable C compiler via --cc
+ --
+ -- The in-place installation always uses the wrapper script,
+ -- (called hsc2hs-inplace, generated from hsc2hs.sh)
+ compiler <- case [c | Compiler c <- flags] of
+ [] -> locateGhc "ghc"
+ [c] -> return c
+ _ -> onlyOne "compiler"
+ linker <- case [l | Linker l <- flags] of
+ [] -> locateGhc compiler
+ [l] -> return l
+ _ -> onlyOne "linker"
+#endif
+
writeFile cProgName $
concatMap outFlagHeaderCProg flags++
concatMap outHeaderCProg specials++
- "\nint main (void)\n{\n"++
+ "\nint main (int argc, char *argv [])\n{\n"++
outHeaderHs flags (if needsH then Just outHName else Nothing) specials++
outHsLine (SourcePos name 0)++
concatMap outTokenHs toks++
" return 0;\n}\n"
- unless (null [() | NoCompile <- flags]) $ exitWith ExitSuccess
+ -- NOTE: hbc compiles "[() | NoCompile <- flags]" into wrong code,
+ -- so we use something slightly more complicated. :-P
+ when (any (\x -> case x of NoCompile -> True; _ -> False) flags) $
+ exitWith ExitSuccess
+
+
- compilerStatus <- system $
- compiler++
- " -c"++
- concat [" "++f | CompFlag f <- flags]++
- " "++cProgName++
- " -o "++oProgName
+ compilerStatus <- rawSystemL beVerbose compiler
+ ( ["-c"]
+ ++ [f | CompFlag f <- flags]
+ ++ [cProgName]
+ ++ ["-o", oProgName]
+ )
+
case compilerStatus of
e@(ExitFailure _) -> exitWith e
_ -> return ()
removeFile cProgName
- linkerStatus <- system $
- linker++
- concat [" "++f | LinkFlag f <- flags]++
- " "++oProgName++
- " -o "++progName
+ linkerStatus <- rawSystemL beVerbose linker
+ ( [f | LinkFlag f <- flags]
+ ++ [oProgName]
+ ++ ["-o", progName]
+ )
+
case linkerStatus of
e@(ExitFailure _) -> exitWith e
_ -> return ()
removeFile oProgName
- progStatus <- system (execProgName++" >"++outName)
+ progStatus <- rawSystemWithStdOutL beVerbose execProgName [] outName
removeFile progName
case progStatus of
e@(ExitFailure _) -> exitWith e
_ -> return ()
when needsH $ writeFile outHName $
- "#ifndef "++includeGuard++"\n\
- \#define "++includeGuard++"\n\
- \#if " ++
- "__GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 409\n\
- \#include <Rts.h>\n\
- \#endif\n\
- \#include <HsFFI.h>\n\
- \#if __NHC__\n\
- \#undef HsChar\n\
- \#define HsChar int\n\
- \#endif\n"++
+ "#ifndef "++includeGuard++"\n" ++
+ "#define "++includeGuard++"\n" ++
+ "#if __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 409\n" ++
+ "#include <Rts.h>\n" ++
+ "#endif\n" ++
+ "#include <HsFFI.h>\n" ++
+ "#if __NHC__\n" ++
+ "#undef HsChar\n" ++
+ "#define HsChar int\n" ++
+ "#endif\n" ++
concatMap outFlagH flags++
concatMap outTokenH specials++
"#endif\n"
-- NB. outHFile not outHName; works better when processed
-- by gcc or mkdependC.
+rawSystemL :: Bool -> FilePath -> [String] -> IO ExitCode
+rawSystemL flg prog args = do
+ let cmdLine = prog++" "++unwords args
+ when flg $ hPutStrLn stderr ("Executing: " ++ cmdLine)
+#ifndef HAVE_rawSystem
+ system cmdLine
+#else
+ rawSystem prog args
+#endif
+
+rawSystemWithStdOutL :: Bool -> FilePath -> [String] -> FilePath -> IO ExitCode
+rawSystemWithStdOutL flg prog args outFile = do
+ let cmdLine = prog++" "++unwords args++" >"++outFile
+ when flg (hPutStrLn stderr ("Executing: " ++ cmdLine))
+#ifndef HAVE_runProcess
+ system cmdLine
+#else
+ hOut <- openFile outFile WriteMode
+ process <- runProcess prog args Nothing Nothing Nothing (Just hOut) Nothing
+ res <- waitForProcess process
+ hClose hOut
+ return res
+#endif
+
onlyOne :: String -> IO a
-onlyOne what = do
- putStrLn ("Only one "++what++" may be specified")
- exitFailure
+onlyOne what = die ("Only one "++what++" may be specified\n")
outFlagHeaderCProg :: Flag -> String
outFlagHeaderCProg (Template t) = "#include \""++t++"\"\n"
outFlagHeaderCProg (Include f) = "#include "++f++"\n"
-outFlagHeaderCProg (Define n Nothing) = "#define "++n++"\n"
+outFlagHeaderCProg (Define n Nothing) = "#define "++n++" 1\n"
outFlagHeaderCProg (Define n (Just v)) = "#define "++n++" "++v++"\n"
outFlagHeaderCProg _ = ""
(header, _:body) -> case break isSpace header of
(name, args) ->
outCLine pos++
- "#define hsc_"++name++"("++dropWhile isSpace args++") \
- \printf ("++joinLines body++");\n"
+ "#define hsc_"++name++"("++dropWhile isSpace args++") " ++
+ "printf ("++joinLines body++");\n"
_ -> ""
- where
+ where
joinLines = concat . intersperse " \\\n" . lines
outHeaderHs :: [Flag] -> Maybe String -> [(SourcePos, String, String)] -> String
outHeaderHs flags inH toks =
"#if " ++
- "__GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 409\n\
- \ printf (\"{-# OPTIONS -optc-D" ++
- "__GLASGOW_HASKELL__=%d #-}\\n\", \
- \__GLASGOW_HASKELL__);\n\
- \#endif\n"++
+ "__GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 409\n" ++
+ " printf (\"{-# OPTIONS -optc-D" ++
+ "__GLASGOW_HASKELL__=%d #-}\\n\", " ++
+ "__GLASGOW_HASKELL__);\n" ++
+ "#endif\n"++
case inH of
Nothing -> concatMap outFlag flags++concatMap outSpecial toks
- Just f -> outOption ("-#include \""++f++"\"")
+ Just f -> outInclude ("\""++f++"\"")
where
- outFlag (Include f) = outOption ("-#include "++f)
+ outFlag (Include f) = outInclude f
outFlag (Define n Nothing) = outOption ("-optc-D"++n)
outFlag (Define n (Just v)) = outOption ("-optc-D"++n++"="++v)
outFlag _ = ""
outSpecial (pos, key, arg) = case key of
- "include" -> outOption ("-#include "++arg)
+ "include" -> outInclude arg
"define" | goodForOptD arg -> outOption ("-optc-D"++toOptD arg)
| otherwise -> ""
_ | conditional key -> outCLine pos++"#"++key++" "++arg++"\n"
toOptD arg = case break isSpace arg of
(name, "") -> name
(name, _:value) -> name++'=':dropWhile isSpace value
- outOption s = " printf (\"{-# OPTIONS %s #-}\\n\", \""++
- showCString s++"\");\n"
+ outOption s =
+ "#if __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 603\n" ++
+ " printf (\"{-# OPTIONS %s #-}\\n\", \""++
+ showCString s++"\");\n"++
+ "#else\n"++
+ " printf (\"{-# OPTIONS_GHC %s #-}\\n\", \""++
+ showCString s++"\");\n"++
+ "#endif\n"
+ outInclude s =
+ "#if __GLASGOW_HASKELL__ && __GLASGOW_HASKELL__ < 603\n" ++
+ " printf (\"{-# OPTIONS -#include %s #-}\\n\", \""++
+ showCString s++"\");\n"++
+ "#else\n"++
+ " printf (\"{-# INCLUDE %s #-}\\n\", \""++
+ showCString s++"\");\n"++
+ "#endif\n"
outTokenHs :: Token -> String
-outTokenHs (Text pos text) =
- case break (== '\n') text of
- (all, []) -> outText all
+outTokenHs (Text pos txt) =
+ case break (== '\n') txt of
+ (allTxt, []) -> outText allTxt
(first, _:rest) ->
outText (first++"\n")++
outHsLine pos++
(enum, rest) -> let
this = case break (== '=') $ dropWhile isSpace enum of
(name, []) ->
- " hsc_enum ("++t++", "++f++", \
- \hsc_haskellize (\""++name++"\"), "++
+ " hsc_enum ("++t++", "++f++", " ++
+ "hsc_haskellize (\""++name++"\"), "++
name++");\n"
(hsName, _:cName) ->
- " hsc_enum ("++t++", "++f++", \
- \printf (\"%s\", \""++hsName++"\"), "++
+ " hsc_enum ("++t++", "++f++", " ++
+ "printf (\"%s\", \""++hsName++"\"), "++
cName++");\n"
in this++enums rest
in enums afterF
outFlagH :: Flag -> String
outFlagH (Include f) = "#include "++f++"\n"
-outFlagH (Define n Nothing) = "#define "++n++"\n"
+outFlagH (Define n Nothing) = "#define "++n++" 1\n"
outFlagH (Define n (Just v)) = "#define "++n++" "++v++"\n"
outFlagH _ = ""
's':'t':'r':'u':'c':'t':' ':_ -> arg++"\n"
't':'y':'p':'e':'d':'e':'f':' ':_ -> arg++"\n"
'i':'n':'l':'i':'n':'e':' ':_ ->
- "#ifdef __GNUC__\n\
- \extern\n\
- \#endif\n"++
+ "#ifdef __GNUC__\n" ++
+ "extern\n" ++
+ "#endif\n"++
arg++"\n"
_ -> "extern "++header++";\n"
- where header = takeWhile (\c -> c /= '{' && c /= '=') arg
+ where header = takeWhile (\c -> c /= '{' && c /= '=') arg
_ | conditional key -> outCLine pos++"#"++key++" "++arg++"\n"
_ -> ""
case span (\c -> c /= '{' && c /= '=') arg' of
(header, body) ->
outCLine pos++
- "#ifndef __GNUC__\n\
- \extern inline\n\
- \#endif\n"++
+ "#ifndef __GNUC__\n" ++
+ "extern inline\n" ++
+ "#endif\n"++
header++
- "\n#ifndef __GNUC__\n\
- \;\n\
- \#else\n"++
+ "\n#ifndef __GNUC__\n" ++
+ ";\n" ++
+ "#else\n"++
body++
"\n#endif\n"
_ -> outCLine pos++arg++"\n"
outCLine :: SourcePos -> String
outCLine (SourcePos name line) =
- "# "++show line++" \""++showCString (snd (splitName name))++"\"\n"
+ "#line "++show line++" \""++showCString (snd (splitName name))++"\"\n"
outHsLine :: SourcePos -> String
outHsLine (SourcePos name line) =
" hsc_line ("++show (line + 1)++", \""++
- showCString (snd (splitName name))++"\");\n"
+ showCString name++"\");\n"
showCString :: String -> String
showCString = concatMap showCChar
intToDigit (ord c `quot` 8 `mod` 8),
intToDigit (ord c `mod` 8)]
+
+
+-----------------------------------------
+-- Modified version from ghc/compiler/SysTools
+-- Convert paths foo/baz to foo\baz on Windows
+
+subst :: Char -> Char -> String -> String
+#if defined(mingw32_HOST_OS) || defined(__CYGWIN32__)
+subst a b = map (\x -> if x == a then b else x)
+#else
+subst _ _ = id
+#endif
+
+dosifyPath :: String -> String
+dosifyPath = subst '/' '\\'
+
+-- (getExecDir cmd) returns the directory in which the current
+-- executable, which should be called 'cmd', is running
+-- So if the full path is /a/b/c/d/e, and you pass "d/e" as cmd,
+-- you'll get "/a/b/c" back as the result
+getExecDir :: String -> IO (Maybe String)
+getExecDir cmd =
+ getExecPath >>= maybe (return Nothing) removeCmdSuffix
+ where unDosifyPath = subst '\\' '/'
+ initN n = reverse . drop n . reverse
+ removeCmdSuffix = return . Just . initN (length cmd) . unDosifyPath
+
+getExecPath :: IO (Maybe String)
+#if defined(__HUGS__)
+getExecPath = liftM Just getProgName
+#elif defined(mingw32_HOST_OS)
+getExecPath =
+ allocaArray len $ \buf -> do
+ ret <- getModuleFileName nullPtr buf len
+ if ret == 0 then return Nothing
+ else liftM Just $ peekCString buf
+ where len = 2048 -- Plenty, PATH_MAX is 512 under Win32.
+
+foreign import stdcall unsafe "GetModuleFileNameA"
+ getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
+#else
+getExecPath = return Nothing
+#endif
projects / ghc-hetmet.git / blobdiff