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-- automatic generation of wrappers for simple GSL special functions
import Text.ParserCombinators.Parsec
import System
import Data.List(intersperse, isPrefixOf)
import Data.Char(toUpper)
data Type = Normal Ident | Pointer Ident deriving (Eq, Show)
type Ident = String
data Header = Header Type Ident [(Type,Ident)] deriving Show
headers f = case parse parseHeaders "" f of
Right l -> l
Left s -> error (show s)
rep (c,r) [] = []
rep (c,r) f@(x:xs)
| c `isPrefixOf` f = r ++ rep (c,r) (drop (length c) f)
| otherwise = x:(rep (c,r) xs)
fixlong [] = []
fixlong "\\" = []
fixlong ('\\':'\n':xs) = xs
fixlong (x:xs) = x : fixlong xs
safe (Header _ _ args) = all ok args
|| all ok (init args) && kn (last args)
where ok ((Normal s),_) | s `elem` ["double","float","int","gsl_mode_t"] = True
ok _ = False
kn ((Pointer "gsl_sf_result"),_) = True
kn _ = False
fixC s = rep ("gsl_mode_t","int") $ rep ("gsl_sf_result","double") $ s
main = do
args <- getArgs
file <- readFile (args!!1)
let name = args!!0
putStrLn (args!!1)
--mapM_ print (headers $ fixlong file)
let parsed = (headers $ fixlong file)
writeFile (name ++".h") (fixC $ unlines $ map showC parsed)
--putStrLn ""
--mapM (\(Header _ n _) -> putStrLn (drop 7 n ++",")) parsed
--putStrLn ""
--mapM_ (putStrLn.showFull (name ++".h")) parsed
let exports = rep (")",") where") $ rep ("(\n","(\n ") $ rep (",\n",", ") $ unlines $ ["("]++intersperse "," (map (\(Header _ n _) -> drop 7 n) (filter safe parsed))++[")"]
let defs = unlines $ map (showFull (name ++".h")) parsed
let imports = "\nimport Foreign(Ptr)\nimport GSL.Special.Internal\n"
let mod = modhead name ++ "module GSL.Special."++ upperFirst name++exports++imports++defs
writeFile (upperFirst name ++ ".hs") mod
modhead name = replicate 60 '-' ++ "\n"
++"{- |\n"
++"Module : GSL.Special."++upperFirst name++"\n"
++"Copyright : (c) Alberto Ruiz 2006\n"
++"License : GPL-style\n"
++"Maintainer : Alberto Ruiz (aruiz at um dot es)\n"
++"Stability : provisional\n"
++"Portability : uses ffi\n"
++"\n\n\n-}\n"
++ replicate 60 '-' ++ "\n\n"
upperFirst (x:xs) = toUpper x : xs
comment = do
string "/*"
closecomment
spaces
return "comment"
closecomment = try (string "*/")
<|> (do anyChar
closecomment)
ident = do
spaces
id <- many1 (noneOf "()[]* \n\t,;")
spaces
return id
comment' = between (char '(') (char ')') (many $ noneOf ")")
define = do
string "#"
closedefine
spaces
return "define"
closedefine = try (string "\n")
<|> (do anyChar
closedefine)
marks = do
try (string "__BEGIN_DECLS" >> spaces >> return "begin")
<|>
try (string "__END_DECLS" >> spaces >> return "end")
irrelevant =
try comment
<|>
try define
<|>
marks
parseHeaders = many parseHeader
parseHeader = do
spaces
many irrelevant
spaces
(res,name) <- typ
spaces
args <- between (char '(') (char ')') (sepBy typ (char ','))
spaces
char ';'
spaces
many irrelevant
return $ Header res name args
typ = try t1 <|> t2
symbol s = spaces >> string s >> spaces
t1 = do
t <- try (symbol "const" >> symbol "unsigned" >> ident) -- aaagh
<|>
try (symbol "const" >> ident)
<|>
try (symbol "unsigned" >> ident)
<|> ident
n <- ident
return (Normal t,n)
t2 = do
t <- ident
spaces
char '*'
spaces
n <- ident
return (Pointer t,n)
pure (Header _ _ args) | fst (last args) == Pointer "gsl_sf_result" = False
| otherwise = True
showC (Header t n args) = showCt t ++ " " ++ n ++ "(" ++ (concat $ intersperse "," $ map showCa args) ++ ");"
showCt (Normal s) = s
showCt (Pointer s) = s ++ "*"
showCa (t, a) = showCt t ++" "++ a
showH hc h@(Header t n args) = "foreign import ccall \""++hc++" "++n++"\" "++n++" :: "++ (concat$intersperse" -> "$map showHa args) ++" -> " ++ t'
where t' | pure h = showHt t
| otherwise = "IO("++showHt t++")"
showHt (Normal (s:ss)) = toUpper s : ss
showHt (Pointer "gsl_sf_result") = "Ptr Double"
showHt (Pointer (s:ss)) = "Ptr "++toUpper s : ss
showHa (t,a) = showHt t
showFull hc h@(Header t n args) = "\n-- | wrapper for "++showC h++"\n"++ boiler h ++"\n" ++showH hc h
fixmd1 = rep ("Gsl_mode_t","Precision")
fixmd2 = rep ("mode"," (precCode mode)")
boiler h@(Header t n args) | fst (last args) == Pointer "gsl_sf_result" = boilerResult h
| any isMode args = boilerMode h
| otherwise = boilerBasic h
isMode (Normal "gsl_mode_t",_) = True
isMode _ = False
boilerResult h@(Header t n args) =
drop 7 n++" :: "++ (fixmd1 $ concat $ intersperse" -> "$ map showHa (init args)) ++" -> " ++ "(Double,Double)\n" ++
drop 7 n ++ " "++(unwords (map snd (init args)))++
" = createSFR \""++ drop 7 n ++"\" $ " ++ n ++ " "++(fixmd2 $ unwords (map snd (init args)))
boilerBasic h@(Header t n args) =
drop 7 n++" :: "++ (fixmd1 $ concat $ intersperse" -> "$map showHa args) ++" -> " ++showHt t ++ "\n" ++
drop 7 n ++ " = " ++fixmd2 n
boilerMode h@(Header t n args) =
drop 7 n++" :: "++ (fixmd1 $ concat $ intersperse" -> "$ map showHa args) ++" -> " ++ showHt t++"\n" ++
drop 7 n ++ " "++(unwords (map snd args))++
" = " ++ n ++ " "++(fixmd2 $ unwords (map snd args))
|
