Retro68/PrepareHeaders.hs

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module Main where
import Text.ParserCombinators.Parsec
import Text.ParserCombinators.Parsec.Language
import Text.ParserCombinators.Parsec.Token
import System.Directory
import System.FilePath
import Control.Monad(guard)
import Data.List(isSuffixOf)
import qualified System.IO.Error(try)
import System.IO
import qualified Text.PrettyPrint.HughesPJ as PP
import Text.PrettyPrint.HughesPJ((<+>),(<>),($$),($+$))
import Data.Char
import Numeric
import Data.Maybe(isJust)
import Control.Monad.State
import qualified Data.Map as Map
import System.Environment(getArgs)
data Item = CharItem Char
| IgnoredItem
| FunctionItem String String [String] [Integer] (Maybe ParameterRegs)
| PragmaParameterItem String ParameterRegs
deriving(Show)
type Register = String
data ParameterRegs = ParameterRegs (Maybe Register) [Register]
deriving(Show)
tp = makeTokenParser javaStyle
item = (char '\r' >> return (CharItem '\n'))
<|> try externApiDeclaration
<|> try (string "= 0x4E90" >> return IgnoredItem)
<|> try (string "= 0x4E91" >> return IgnoredItem)
<|> try pragmaParameter
<|> fmap CharItem anyChar
balancedText stopAtComma = fmap (foldr ($) "") $
many (fmap (++) paranthesized <|> fmap (:) (noneOf (if stopAtComma then "()," else "()")))
where paranthesized = char '(' >> balancedText False >>= \xs -> char ')' >> return ('(' : xs ++ ")")
trim = dropWhile isSpace . reverse . dropWhile isSpace . reverse
cleanup = unwords . words . trim
externApiDeclaration = do
reserved tp "EXTERN_API"
rettype <- fmap trim $ parens tp (balancedText False)
name <- identifier tp
arguments <- fmap (map cleanup) $ parens tp (commaSep tp $ balancedText True)
inlines <- option [] $ do
inlinekey <- identifier tp
guard ("WORDINLINE" `isSuffixOf` inlinekey)
parens tp (commaSep tp hexword)
semi tp
return $ FunctionItem rettype name (if arguments == ["void"] then [] else arguments) inlines Nothing
pragmaParameter = do
reservedOp tp "#"
reserved tp "pragma"
reserved tp "parameter"
retval <- optionMaybe reg
name <- identifier tp
args <- parens tp (commaSep tp reg)
-- args <- option [] $ parens tp (fmap return $ reg)
-- let args = []
return $ PragmaParameterItem name (ParameterRegs retval args)
reg = (reserved tp "__A0" >> return "%%a0")
<|>(reserved tp "__A1" >> return "%%a1")
<|>(reserved tp "__A2" >> return "%%a2")
<|>(reserved tp "__D0" >> return "%%d0")
<|>(reserved tp "__D1" >> return "%%d1")
data TypeCategory = ByteType | WordType | LongType | PointerType | VoidType
deriving(Show, Eq)
classifyType tm t | "Ptr" `isSuffixOf` t = Just PointerType
| "*" `isSuffixOf` t = Just PointerType
| "Handle" `isSuffixOf` t = Just PointerType
classifyType tm "unsigned char" = Just ByteType
classifyType tm "signed char" = Just ByteType
classifyType tm "char" = Just ByteType
classifyType tm "short" = Just WordType
classifyType tm "long" = Just LongType
classifyType tm "void" = Just VoidType
classifyType tm t = Map.lookup t tm
hexword = integer tp
outputItem typeMap (CharItem c) = [c]
-- outputItem (FunctionItem rettype name arguments words) = "<fun>"
outputItem typeMap (FunctionItem rettype name arguments words mbParamRegs) =
PP.render $
linkage <+> PP.text rettype <+> PP.text name
<+> PP.parens (PP.hsep $ PP.punctuate PP.comma $ map PP.text arguments) $$
if isJust mbCategories && not (null words)
then
PP.text "{" $+$ (PP.nest 4 $
addReturnValue $
PP.text "__asm__ __volatile__ (" $+$
PP.nest 4 (
PP.nest 4 (PP.vcat asmStatements) $+$
showConstraints outs $+$
showConstraints ins $+$
PP.text ": \"%a0\", \"%a1\", \"%d0\", \"%d1\", \"%d2\", \"memory\", \"cc\""
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<> (if tooltrap then PP.text ", \"%a5\"" else PP.empty)
)
$+$ PP.text ");"
) $+$ PP.text "}\n\n"
else
PP.semi $+$
PP.text "//" <+> PP.text (show words) $+$
PP.text "//" <+> PP.text rettype <+> PP.text (show $ (classifyType typeMap) rettype) $+$
PP.text "//" <+> PP.text (show argumentTypes) <+> PP.text (show $ map (classifyType typeMap) argumentTypes) $+$
PP.text "\n" -- couldn't convert type
where
tooltrap = True -- trapnum >= 0xA800
linkage | null words = PP.text "extern"
| otherwise = PP.text "static inline"
argumentNames = map (trim . reverse . takeWhile isAlphaNum . reverse . trim) arguments
argumentTypes = map (trim . reverse . dropWhile isAlphaNum . reverse . trim) arguments
mbCategories = do
retcat <- classifyType typeMap rettype
argcats <- mapM (classifyType typeMap) argumentTypes
return (retcat, argcats)
Just (returnCategory, argumentCategories) = mbCategories
returnsValue = returnCategory /= VoidType
addReturnValue body
| returnsValue = (PP.text rettype <+> PP.text "_ret;") $+$
body $+$
PP.text "return _ret;"
| otherwise = body
outs | returnsValue = [PP.text "\"=g\"(_ret)"]
| otherwise = []
ins = zipWith inputConstraint argumentCategories argumentNames
inputConstraint PointerType name = PP.text "\"m\"(*(char*)" <> PP.text name <> PP.text ")"
inputConstraint VoidType name = error $ "Void Parameter: " ++ name
inputConstraint _ name = PP.text "\"g\"(" <> PP.text name <> PP.text ")"
showConstraints constraints = PP.text ":" <+> PP.hsep (PP.punctuate PP.comma $ constraints)
asmStatements =
(if tooltrap then [-- PP.text "\"move.l %%a5, %%a4\\n\"",
PP.text "\"move.l 0x904.w, %%a5\\n\""] else []) ++
subq ++
pushes ++
map (\trapnum -> PP.text "\"dc.w" <+> PP.text "0x" <> PP.text (showHex trapnum "") <> PP.text "\\n\\t\"") words
++ pop
-- ++ (if tooltrap then [PP.text "\"move.l %%a4, %%a5\\n\""] else [])
(subq, pop) = case returnCategory of
VoidType -> ([], [])
_ -> (ifpascal [PP.text "\"subq #" <> PP.int size <> PP.text ", %%sp\\n\\t\""],
[PP.text "\"move" <> szLetter <+> src <+> PP.text ", %0\\n\\t\""])
where
size = case returnCategory of
PointerType -> 4 ; LongType -> 4 ; WordType -> 2 ; ByteType -> 2 {- keep stack aligned -}
szLetter = PP.text $ case returnCategory of
PointerType -> ".l" ; LongType -> ".l" ; WordType -> ".w" ; ByteType -> ".b"
src = case mbParamRegs of
Nothing -> PP.text "%%sp@+"
Just (ParameterRegs (Just r) _) -> PP.text r
Just (ParameterRegs Nothing _) -> error $ "no reg for return value: " ++ name
ifpascal x = case mbParamRegs of Nothing -> x ; Just _ -> []
pushes = case mbParamRegs of
Nothing -> zipWith (mkPush Nothing) argumentCategories
Just (ParameterRegs _ regs) -> zipWith3 mkPush (map Just regs) argumentCategories
$
map (\i -> PP.char '%' <> PP.int i) $
(if returnsValue then [1..] else [0..])
endtxt = PP.text "\\n\\t\""
mkPush Nothing PointerType operand = PP.text "\"pea" <+> operand <> endtxt
mkPush (Just reg) PointerType operand = PP.text "\"lea" <+> operand <> PP.comma <+> PP.text reg <> endtxt
mkPush mbReg size operand =
PP.text "\"move" <> PP.text sz <+> operand <> PP.comma <+> dst <> endtxt
where
sz = case size of
LongType -> ".l" ; WordType -> ".w" ; ByteType -> ".b"
dst = case mbReg of
Nothing -> PP.text "%%sp@-"
Just reg -> PP.text reg
outputItem _ _ = ""
collectPragmas xs = evalState (mapM doit xs) Map.empty
where
doit x@(PragmaParameterItem name params) = modify (Map.insert name params) >> return x
doit (FunctionItem rettype name arguments inlines _) = do
m <- get
return $ FunctionItem rettype name arguments inlines (Map.lookup name m)
doit x = return x
parseTypeMap tm = Map.fromList $ map handleLine $ lines tm
where
handleLine tml = case words tml of
(x : xs) -> (trim $ unwords xs, case x of
"B" -> ByteType ; "W" -> WordType ; "L" -> LongType ; "P" -> PointerType)
processFile inputDir outputDir file
| ".h" `isSuffixOf` file = do
print $ (outputDir </> takeFileName file)
-- readFile (inputDir </> file)
f <- openFile (inputDir </> file) ReadMode
hSetEncoding f latin1
txt <- hGetContents f
let parseResult = parse (many item) file txt
typeMap <- fmap parseTypeMap $ readFile "../Retro68/types.txt"
case parseResult of
Right items -> do
outf <- openFile (outputDir </> file) WriteMode
hSetEncoding outf latin1
when (file == "ConditionalMacros.h") $ do
hPutStrLn outf $ unlines [
"#define TARGET_CPU_68K 1",
"#define TYPE_LONGLONG 1",
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"#define pascal",
"#ifdef __cplusplus",
"#define TYPE_BOOL 1",
"#endif"
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]
hPutStr outf $ concatMap (outputItem typeMap) $ collectPragmas $ items
hClose outf
Left err -> putStrLn $ file ++ ": " ++ show err
| otherwise = do
putStrLn $ "Unknown: " ++ file
main = do
[inputDir,outputDir] <- getArgs
files <- getDirectoryContents inputDir
System.IO.Error.try (createDirectory outputDir)
mapM (processFile inputDir outputDir) files
return ()