{-# LANGUAGE ScopedTypeVariables #-}
module Pas2C where
import Text.PrettyPrint.HughesPJ
import Data.Maybe
import Data.Char
import Text.Parsec.Prim hiding (State)
import Control.Monad.State
import System.IO
import System.Directory
import Control.Monad.IO.Class
import PascalPreprocessor
import Control.Exception
import System.IO.Error
import qualified Data.Map as Map
import Data.List (find)
import Numeric
import PascalParser
import PascalUnitSyntaxTree
data InsertOption =
IOInsert
| IOLookup
| IODeferred
type Record = (String, (String, BaseType))
data RenderState = RenderState
{
currentScope :: [Record],
lastIdentifier :: String,
lastType :: BaseType,
stringConsts :: [(String, String)],
uniqCounter :: Int,
namespaces :: Map.Map String [Record]
}
emptyState = RenderState [] "" BTUnknown [] 0
getUniq :: State RenderState Int
getUniq = do
i <- gets uniqCounter
modify(\s -> s{uniqCounter = uniqCounter s + 1})
return i
addStringConst :: String -> State RenderState Doc
addStringConst str = do
strs <- gets stringConsts
let a = find ((==) str . snd) strs
if isJust a then
do
modify (\s -> s{lastType = BTString})
return . text . fst . fromJust $ a
else
do
i <- getUniq
let sn = "__str" ++ show i
modify (\s -> s{lastType = BTString, stringConsts = (sn, str) : strs})
return $ text sn
escapeStr :: String -> String
escapeStr = foldr escapeChar []
escapeChar :: Char -> ShowS
escapeChar '"' s = "\\\"" ++ s
escapeChar a s = a : s
strInit :: String -> Doc
strInit a = text "STRINIT" <> parens (doubleQuotes (text $ escapeStr a))
renderStringConsts :: State RenderState Doc
renderStringConsts = liftM (vcat . map (\(a, b) -> text "const string255" <+> (text a) <+> text "=" <+> strInit b <> semi))
$ gets stringConsts
docToLower :: Doc -> Doc
docToLower = text . map toLower . render
pas2C :: String -> IO ()
pas2C fn = do
setCurrentDirectory "../hedgewars/"
s <- flip execStateT initState $ f fn
renderCFiles s
where
printLn = liftIO . hPutStrLn stderr
print = liftIO . hPutStr stderr
initState = Map.empty
f :: String -> StateT (Map.Map String PascalUnit) IO ()
f fileName = do
processed <- gets $ Map.member fileName
unless processed $ do
print ("Preprocessing '" ++ fileName ++ ".pas'... ")
fc' <- liftIO
$ tryJust (guard . isDoesNotExistError)
$ preprocess (fileName ++ ".pas")
case fc' of
(Left a) -> do
modify (Map.insert fileName (System []))
printLn "doesn't exist"
(Right fc) -> do
print "ok, parsing... "
let ptree = parse pascalUnit fileName fc
case ptree of
(Left a) -> do
liftIO $ writeFile "preprocess.out" fc
printLn $ show a ++ "\nsee preprocess.out for preprocessed source"
fail "stop"
(Right a) -> do
printLn "ok"
modify (Map.insert fileName a)
mapM_ f (usesFiles a)
renderCFiles :: Map.Map String PascalUnit -> IO ()
renderCFiles units = do
let u = Map.toList units
let nss = Map.map (toNamespace nss) units
hPutStrLn stderr $ "Units: " ++ (show . Map.keys . Map.filter (not . null) $ nss)
--writeFile "pas2c.log" $ unlines . map (\t -> show (fst t) ++ "\n" ++ (unlines . map ((:) '\t' . show) . snd $ t)) . Map.toList $ nss
mapM_ (toCFiles nss) u
where
toNamespace :: Map.Map String [Record] -> PascalUnit -> [Record]
toNamespace nss (System tvs) =
currentScope $ execState (mapM_ (tvar2C True) tvs) (emptyState nss)
toNamespace _ (Program {}) = []
toNamespace nss (Unit _ interface _ _ _) =
currentScope $ execState (interface2C interface) (emptyState nss)
withState' :: (RenderState -> RenderState) -> State RenderState a -> State RenderState a
withState' f sf = do
st <- liftM f get
let (a, s) = runState sf st
modify(\st -> st{
lastType = lastType s
, uniqCounter = uniqCounter s
, stringConsts = stringConsts s
})
return a
withLastIdNamespace :: State RenderState Doc -> State RenderState Doc
withLastIdNamespace f = do
li <- gets lastIdentifier
nss <- gets namespaces
withState' (\st -> st{currentScope = fromMaybe [] $ Map.lookup li (namespaces st)}) f
withRecordNamespace :: String -> [(String, BaseType)] -> State RenderState Doc -> State RenderState Doc
withRecordNamespace _ [] = error "withRecordNamespace: empty record"
withRecordNamespace prefix recs = withState' f
where
f st = st{currentScope = records ++ currentScope st}
records = map (\(a, b) -> (map toLower a, (prefix ++ a, b))) recs
toCFiles :: Map.Map String [Record] -> (String, PascalUnit) -> IO ()
toCFiles _ (_, System _) = return ()
toCFiles ns p@(fn, pu) = do
hPutStrLn stderr $ "Rendering '" ++ fn ++ "'..."
toCFiles' p
where
toCFiles' (fn, p@(Program {})) = writeFile (fn ++ ".c") $ (render2C initialState . pascal2C) p
toCFiles' (fn, (Unit unitId interface implementation _ _)) = do
let (a, s) = runState (id2C IOInsert (setBaseType BTUnit unitId) >> interface2C interface) initialState
writeFile (fn ++ ".h") $ "#pragma once\n\n#include \"pas2c.h\"\n\n" ++ (render (a $+$ text ""))
writeFile (fn ++ ".c") $ "#include \"" ++ fn ++ ".h\"\n" ++ (render2C s . implementation2C) implementation
initialState = emptyState ns
render2C :: RenderState -> State RenderState Doc -> String
render2C a = render . ($+$ empty) . flip evalState a
usesFiles :: PascalUnit -> [String]
usesFiles (Program _ (Implementation uses _) _) = "pas2cSystem" : uses2List uses
usesFiles (Unit _ (Interface uses1 _) (Implementation uses2 _) _ _) = "pas2cSystem" : uses2List uses1 ++ uses2List uses2
usesFiles (System {}) = []
pascal2C :: PascalUnit -> State RenderState Doc
pascal2C (Unit _ interface implementation init fin) =
liftM2 ($+$) (interface2C interface) (implementation2C implementation)
pascal2C (Program _ implementation mainFunction) = do
impl <- implementation2C implementation
[main] <- tvar2C True
(FunctionDeclaration (Identifier "main" BTInt) (SimpleType $ Identifier "int" BTInt) [] (Just (TypesAndVars [], mainFunction)))
return $ impl $+$ main
interface2C :: Interface -> State RenderState Doc
interface2C (Interface uses tvars) = do
u <- uses2C uses
tv <- typesAndVars2C True tvars
r <- renderStringConsts
return (u $+$ r $+$ tv)
implementation2C :: Implementation -> State RenderState Doc
implementation2C (Implementation uses tvars) = do
u <- uses2C uses
tv <- typesAndVars2C True tvars
r <- renderStringConsts
return (u $+$ r $+$ tv)
typesAndVars2C :: Bool -> TypesAndVars -> State RenderState Doc
typesAndVars2C b (TypesAndVars ts) = liftM (vcat . map (<> semi) . concat) $ mapM (tvar2C b) ts
setBaseType :: BaseType -> Identifier -> Identifier
setBaseType bt (Identifier i _) = Identifier i bt
uses2C :: Uses -> State RenderState Doc
uses2C uses@(Uses unitIds) = do
mapM_ injectNamespace (Identifier "pas2cSystem" undefined : unitIds)
mapM_ (id2C IOInsert . setBaseType BTUnit) unitIds
return $ vcat . map (\i -> text $ "#include \"" ++ i ++ ".h\"") $ uses2List uses
where
injectNamespace (Identifier i _) = do
getNS <- gets (flip Map.lookup . namespaces)
let f = flip (foldl (flip (:))) (fromMaybe [] (getNS i))
modify (\s -> s{currentScope = f $ currentScope s})
uses2List :: Uses -> [String]
uses2List (Uses ids) = map (\(Identifier i _) -> i) ids
id2C :: InsertOption -> Identifier -> State RenderState Doc
id2C IOInsert (Identifier i t) = do
ns <- gets currentScope
{-- case t of
BTUnknown -> do
ns <- gets currentScope
error $ "id2C IOInsert: type BTUnknown for " ++ show i ++ "\nnamespace: " ++ show (take 100 ns)
_ -> do --}
modify (\s -> s{currentScope = (n, (i, t)) : currentScope s, lastIdentifier = n})
return $ text i
where
n = map toLower i
id2C IOLookup (Identifier i t) = do
let i' = map toLower i
v <- gets $ find (\(a, _) -> a == i') . currentScope
ns <- gets currentScope
lt <- gets lastType
if isNothing v then
error $ "Not defined: '" ++ i' ++ "'\n" ++ show lt ++ "\n" ++ show (take 100 ns)
else
let vv = snd $ fromJust v in modify (\s -> s{lastType = snd vv, lastIdentifier = fst vv}) >> (return . text . fst $ vv)
id2C IODeferred (Identifier i t) = do
let i' = map toLower i
v <- gets $ find (\(a, _) -> a == i') . currentScope
if (isNothing v) then
return $ text i
else
return . text . fst . snd . fromJust $ v
id2CTyped :: TypeDecl -> Identifier -> State RenderState Doc
id2CTyped t (Identifier i _) = do
tb <- resolveType t
ns <- gets currentScope
case tb of
BTUnknown -> do
ns <- gets currentScope
error $ "id2CTyped: type BTUnknown for " ++ show i ++ "\ntype: " ++ show t ++ "\nnamespace: " ++ show (take 100 ns)
_ -> return ()
id2C IOInsert (Identifier i tb)
resolveType :: TypeDecl -> State RenderState BaseType
resolveType st@(SimpleType (Identifier i _)) = do
let i' = map toLower i
v <- gets $ find (\(a, _) -> a == i') . currentScope
if isJust v then return . snd . snd $ fromJust v else return $ f i'
where
f "integer" = BTInt
f "pointer" = BTPointerTo BTVoid
f "boolean" = BTBool
f "float" = BTFloat
f "char" = BTChar
f "string" = BTString
f _ = error $ "Unknown system type: " ++ show st
resolveType (PointerTo (SimpleType (Identifier i _))) = return . BTPointerTo $ BTUnresolved (map toLower i)
resolveType (PointerTo t) = liftM BTPointerTo $ resolveType t
resolveType (RecordType tv mtvs) = do
tvs <- mapM f (concat $ tv : fromMaybe [] mtvs)
return . BTRecord . concat $ tvs
where
f :: TypeVarDeclaration -> State RenderState [(String, BaseType)]
f (VarDeclaration _ (ids, td) _) = mapM (\(Identifier i _) -> liftM ((,) i) $ resolveType td) ids
resolveType (ArrayDecl (Just i) t) = do
t' <- resolveType t
return $ BTArray i BTInt t'
resolveType (ArrayDecl Nothing t) = liftM (BTArray RangeInfinite BTInt) $ resolveType t
resolveType (FunctionType t _) = liftM BTFunction $ resolveType t
resolveType (DeriveType (InitHexNumber _)) = return BTInt
resolveType (DeriveType (InitNumber _)) = return BTInt
resolveType (DeriveType (InitFloat _)) = return BTFloat
resolveType (DeriveType (InitString _)) = return BTString
resolveType (DeriveType (InitBinOp {})) = return BTInt
resolveType (DeriveType (InitPrefixOp {})) = return BTInt
resolveType (DeriveType (BuiltInFunction{})) = return BTInt
resolveType (DeriveType (InitReference (Identifier{}))) = return BTBool -- TODO: derive from actual type
resolveType (DeriveType _) = return BTUnknown
resolveType (String _) = return BTString
resolveType VoidType = return BTVoid
resolveType (Sequence ids) = return $ BTEnum $ map (\(Identifier i _) -> map toLower i) ids
resolveType (RangeType _) = return $ BTVoid
resolveType (Set t) = liftM BTSet $ resolveType t
resolve :: String -> BaseType -> State RenderState BaseType
resolve s (BTUnresolved t) = do
v <- gets $ find (\(a, _) -> a == t) . currentScope
if isJust v then
resolve s . snd . snd . fromJust $ v
else
error $ "Unknown type " ++ show t ++ "\n" ++ s
resolve _ t = return t
fromPointer :: String -> BaseType -> State RenderState BaseType
fromPointer s (BTPointerTo t) = resolve s t
fromPointer s (BTFunctionReturn _ (BTPointerTo t)) = resolve s t
fromPointer s t = do
ns <- gets currentScope
error $ "Dereferencing from non-pointer type " ++ show t ++ "\n" ++ s ++ "\n\n" ++ show (take 100 ns)
functionParams2C params = liftM (hcat . punctuate comma . concat) $ mapM (tvar2C False) params
fun2C :: Bool -> String -> TypeVarDeclaration -> State RenderState [Doc]
fun2C _ _ (FunctionDeclaration name returnType params Nothing) = do
t <- type2C returnType
t'<- gets lastType
p <- withState' id $ functionParams2C params
n <- id2C IOInsert $ setBaseType (BTFunction t') name
return [t empty <+> n <> parens p]
fun2C True rv (FunctionDeclaration name returnType params (Just (tvars, phrase))) = do
let res = docToLower $ text rv <> text "_result"
t <- type2C returnType
t'<- gets lastType
n <- id2C IOInsert $ setBaseType (BTFunction t') name
(p, ph) <- withState' (\st -> st{currentScope = (map toLower rv, (render res, BTFunctionReturn (render n) t')) : currentScope st}) $ do
p <- functionParams2C params
ph <- liftM2 ($+$) (typesAndVars2C False tvars) (phrase2C' phrase)
return (p, ph)
let phrasesBlock = case returnType of
VoidType -> ph
_ -> t empty <+> res <> semi $+$ ph $+$ text "return" <+> res <> semi
return [
t empty <+> n <> parens p
$+$
text "{"
$+$
nest 4 phrasesBlock
$+$
text "}"]
where
phrase2C' (Phrases p) = liftM vcat $ mapM phrase2C p
phrase2C' p = phrase2C p
fun2C False _ (FunctionDeclaration (Identifier name _) _ _ _) = error $ "nested functions not allowed: " ++ name
fun2C _ tv _ = error $ "fun2C: I don't render " ++ show tv
tvar2C :: Bool -> TypeVarDeclaration -> State RenderState [Doc]
tvar2C b f@(FunctionDeclaration (Identifier name _) _ _ _) =
fun2C b name f
tvar2C _ td@(TypeDeclaration i' t) = do
i <- id2CTyped t i'
tp <- case t of
FunctionType {} -> type2C (PointerTo t)
_ -> type2C t
return [text "typedef" <+> tp i]
tvar2C _ (VarDeclaration isConst (ids, t) mInitExpr) = do
t' <- liftM (((if isConst then text "const" else empty) <+>) . ) $ type2C t
lt <- gets lastType
ie <- initExpr mInitExpr
case (isConst, lt, ids, mInitExpr) of
(True, BTInt, [i], Just _) -> do
i' <- id2CTyped t i
return [text "enum" <> braces (i' <+> ie)]
_ -> liftM (map(\i -> t' i <+> ie)) $ mapM (id2CTyped t) ids
where
initExpr Nothing = return $ empty
initExpr (Just e) = liftM (text "=" <+>) (initExpr2C e)
tvar2C f (OperatorDeclaration op (Identifier i _) ret params body) = do
r <- op2CTyped op (extractTypes params)
fun2C f i (FunctionDeclaration r ret params body)
op2CTyped :: String -> [TypeDecl] -> State RenderState Identifier
op2CTyped op t = do
t' <- liftM (render . hcat . punctuate (char '_') . map (\t -> t empty)) $ mapM type2C t
bt <- gets lastType
return $ case bt of
BTRecord {} -> Identifier (t' ++ "_op_" ++ opStr) bt
_ -> Identifier t' bt
where
opStr = case op of
"+" -> "add"
"-" -> "sub"
"*" -> "mul"
"/" -> "div"
"=" -> "eq"
"<" -> "lt"
">" -> "gt"
_ -> error $ "op2CTyped: unknown op '" ++ op ++ "'"
extractTypes :: [TypeVarDeclaration] -> [TypeDecl]
extractTypes = concatMap f
where
f (VarDeclaration _ (ids, t) _) = replicate (length ids) t
f a = error $ "extractTypes: can't extract from " ++ show a
initExpr2C :: InitExpression -> State RenderState Doc
initExpr2C InitNull = return $ text "NULL"
initExpr2C (InitAddress expr) = liftM ((<>) (text "&")) (initExpr2C expr)
initExpr2C (InitPrefixOp op expr) = liftM (text (op2C op) <>) (initExpr2C expr)
initExpr2C (InitBinOp op expr1 expr2) = do
e1 <- initExpr2C expr1
e2 <- initExpr2C expr2
return $ parens $ e1 <+> text (op2C op) <+> e2
initExpr2C (InitNumber s) = return $ text s
initExpr2C (InitFloat s) = return $ text s
initExpr2C (InitHexNumber s) = return $ text "0x" <> (text . map toLower $ s)
initExpr2C (InitString [a]) = return . quotes $ text [a]
initExpr2C (InitString s) = return $ strInit s
initExpr2C (InitChar a) = return $ quotes $ text "\\x" <> text (showHex (read a) "")
initExpr2C (InitReference i) = id2C IOLookup i
initExpr2C (InitRecord fields) = do
(fs :: [Doc]) <- mapM (\(Identifier a _, b) -> liftM (text "." <> text a <+> equals <+>) $ initExpr2C b) fields
return $ lbrace $+$ (nest 4 . vcat . punctuate comma $ fs) $+$ rbrace
initExpr2C (InitArray [value]) = initExpr2C value
initExpr2C (InitArray values) = liftM (braces . vcat . punctuate comma) $ mapM initExpr2C values
initExpr2C r@(InitRange (Range i@(Identifier i' _))) = do
id2C IOLookup i
t <- gets lastType
case t of
BTEnum s -> return . int $ length s
BTInt -> case i' of
"byte" -> return $ int 256
_ -> error $ "InitRange identifier: " ++ i'
_ -> error $ "InitRange: " ++ show r
initExpr2C (InitRange (RangeFromTo (InitNumber "0") r)) = initExpr2C $ BuiltInFunction "succ" [r]
initExpr2C (InitRange (RangeFromTo (InitChar "0") (InitChar r))) = initExpr2C $ BuiltInFunction "succ" [InitNumber r]
initExpr2C (InitRange a) = error $ show a --return $ text "<<range>>"
initExpr2C (InitSet []) = return $ text "0"
initExpr2C (InitSet a) = return $ text "<<set>>"
initExpr2C (BuiltInFunction "low" [InitReference e]) = return $
case e of
(Identifier "LongInt" _) -> int (-2^31)
(Identifier "SmallInt" _) -> int (-2^15)
_ -> error $ "BuiltInFunction 'low': " ++ show e
initExpr2C (BuiltInFunction "high" [e]) = do
initExpr2C e
t <- gets lastType
case t of
(BTArray i _ _) -> initExpr2C $ BuiltInFunction "pred" [InitRange i]
a -> error $ "BuiltInFunction 'high': " ++ show a
initExpr2C (BuiltInFunction "succ" [BuiltInFunction "pred" [e]]) = initExpr2C e
initExpr2C (BuiltInFunction "pred" [BuiltInFunction "succ" [e]]) = initExpr2C e
initExpr2C (BuiltInFunction "succ" [e]) = liftM (<> text " + 1") $ initExpr2C e
initExpr2C (BuiltInFunction "pred" [e]) = liftM (<> text " - 1") $ initExpr2C e
initExpr2C b@(BuiltInFunction _ _) = error $ show b
initExpr2C a = error $ "initExpr2C: don't know how to render " ++ show a
range2C :: InitExpression -> State RenderState [Doc]
range2C (InitString [a]) = return [quotes $ text [a]]
range2C (InitRange (Range i)) = liftM (flip (:) []) $ id2C IOLookup i
range2C (InitRange (RangeFromTo (InitString [a]) (InitString [b]))) = return $ map (\i -> quotes $ text [i]) [a..b]
range2C a = liftM (flip (:) []) $ initExpr2C a
type2C :: TypeDecl -> State RenderState (Doc -> Doc)
type2C (SimpleType i) = liftM (\i a -> i <+> a) $ id2C IOLookup i
type2C t = do
r <- type2C' t
rt <- resolveType t
modify (\st -> st{lastType = rt})
return r
where
type2C' VoidType = return (text "void" <+>)
type2C' (String l) = return (text "string255" <+>)--return (text ("string" ++ show l) <+>)
type2C' (PointerTo (SimpleType i)) = liftM (\i a -> text "struct __" <> i <+> text "*" <+> a) $ id2C IODeferred i
type2C' (PointerTo t) = liftM (\t a -> t (parens $ text "*" <> a)) $ type2C t
type2C' (RecordType tvs union) = do
t <- withState' id $ mapM (tvar2C False) tvs
u <- unions
return $ \i -> text "struct __" <> i <+> lbrace $+$ nest 4 ((vcat . map (<> semi) . concat $ t) $$ u) $+$ rbrace <+> i
where
unions = case union of
Nothing -> return empty
Just a -> do
structs <- mapM struct2C a
return $ text "union" $+$ braces (nest 4 $ vcat structs) <> semi
struct2C tvs = do
t <- withState' id $ mapM (tvar2C False) tvs
return $ text "struct" $+$ braces (nest 4 (vcat . map (<> semi) . concat $ t)) <> semi
type2C' (RangeType r) = return (text "int" <+>)
type2C' (Sequence ids) = do
is <- mapM (id2C IOInsert . setBaseType bt) ids
return (text "enum" <+> (braces . vcat . punctuate comma . map (\(a, b) -> a <+> equals <+> text "0x" <> text (showHex b "")) $ zip is [1..]) <+>)
where
bt = BTEnum $ map (\(Identifier i _) -> map toLower i) ids
type2C' (ArrayDecl Nothing t) = type2C (PointerTo t)
type2C' (ArrayDecl (Just r) t) = do
t' <- type2C t
r' <- initExpr2C (InitRange r)
return $ \i -> t' i <> brackets r'
type2C' (Set t) = return (text "<<set>>" <+>)
type2C' (FunctionType returnType params) = do
t <- type2C returnType
p <- withState' id $ functionParams2C params
return (\i -> t empty <+> i <> parens p)
type2C' (DeriveType (InitBinOp {})) = return (text "int" <+>)
type2C' (DeriveType (InitPrefixOp _ i)) = type2C' (DeriveType i)
type2C' (DeriveType (InitNumber _)) = return (text "int" <+>)
type2C' (DeriveType (InitHexNumber _)) = return (text "int" <+>)
type2C' (DeriveType (InitFloat _)) = return (text "float" <+>)
type2C' (DeriveType (BuiltInFunction {})) = return (text "int" <+>)
type2C' (DeriveType (InitString {})) = return (text "string255" <+>)
type2C' (DeriveType (InitReference {})) = return (text "<<some type>>" <+>)
type2C' (DeriveType a) = error $ "Can't derive type from " ++ show a
phrase2C :: Phrase -> State RenderState Doc
phrase2C (Phrases p) = do
ps <- mapM phrase2C p
return $ text "{" $+$ (nest 4 . vcat $ ps) $+$ text "}"
phrase2C (ProcCall f@(FunCall {}) []) = liftM (<> semi) $ ref2C f
phrase2C (ProcCall ref []) = liftM (<> semi) $ ref2CF ref
phrase2C (ProcCall ref params) = error $ "ProcCall"{-do
r <- ref2C ref
ps <- mapM expr2C params
return $ r <> parens (hsep . punctuate (char ',') $ ps) <> semi -}
phrase2C (IfThenElse (expr) phrase1 mphrase2) = do
e <- expr2C expr
p1 <- (phrase2C . wrapPhrase) phrase1
el <- elsePart
return $
text "if" <> parens e $+$ p1 $+$ el
where
elsePart | isNothing mphrase2 = return $ empty
| otherwise = liftM (text "else" $$) $ (phrase2C . wrapPhrase) (fromJust mphrase2)
phrase2C (Assignment ref expr) = do
r <- ref2C ref
t <- gets lastType
e <- case (t, expr) of
(BTFunction _, (Reference r')) -> ref2C r'
_ -> expr2C expr
return $ r <+> text "=" <+> e <> semi
phrase2C (WhileCycle expr phrase) = do
e <- expr2C expr
p <- phrase2C $ wrapPhrase phrase
return $ text "while" <> parens e $$ p
phrase2C (SwitchCase expr cases mphrase) = do
e <- expr2C expr
cs <- mapM case2C cases
d <- dflt
return $
text "switch" <> parens e $+$ braces (nest 4 . vcat $ cs ++ d)
where
case2C :: ([InitExpression], Phrase) -> State RenderState Doc
case2C (e, p) = do
ies <- mapM range2C e
ph <- phrase2C p
return $
vcat (map (\i -> text "case" <+> i <> colon) . concat $ ies) <> nest 4 (ph $+$ text "break;")
dflt | isNothing mphrase = return []
| otherwise = do
ph <- mapM phrase2C $ fromJust mphrase
return [text "default:" <+> nest 4 (vcat ph)]
phrase2C wb@(WithBlock ref p) = do
r <- ref2C ref
t <- gets lastType
case t of
(BTRecord rs) -> withRecordNamespace (render r ++ ".") rs $ phrase2C $ wrapPhrase p
a -> do
ns <- gets currentScope
error $ "'with' block referencing non-record type " ++ show a ++ "\n" ++ show wb ++ "\nnamespace: " ++ show (take 100 ns)
phrase2C (ForCycle i' e1' e2' p) = do
i <- id2C IOLookup i'
e1 <- expr2C e1'
e2 <- expr2C e2'
ph <- phrase2C (wrapPhrase p)
return $
text "for" <> (parens . hsep . punctuate (char ';') $ [i <+> text "=" <+> e1, i <+> text "<=" <+> e2, text "++" <> i])
$$
ph
phrase2C (RepeatCycle e' p') = do
e <- expr2C e'
p <- phrase2C (Phrases p')
return $ text "do" <+> p <+> text "while" <> parens (text "!" <> parens e) <> semi
phrase2C NOP = return $ text ";"
phrase2C (BuiltInFunctionCall [] (SimpleReference (Identifier "exit" BTUnknown))) = return $ text "return" <> semi
phrase2C (BuiltInFunctionCall [e] (SimpleReference (Identifier "exit" BTUnknown))) = liftM (\e -> text "return" <> e <> semi) $ expr2C e
phrase2C (BuiltInFunctionCall [e] (SimpleReference (Identifier "dec" BTUnknown))) = liftM (\e -> text "--" <> e <> semi) $ expr2C e
phrase2C (BuiltInFunctionCall [e1, e2] (SimpleReference (Identifier "dec" BTUnknown))) = liftM2 (\a b -> a <> text " -= " <> b <> semi) (expr2C e1) (expr2C e2)
phrase2C (BuiltInFunctionCall [e] (SimpleReference (Identifier "inc" BTUnknown))) = liftM (\e -> text "++" <> e <> semi) $ expr2C e
phrase2C (BuiltInFunctionCall [e1, e2] (SimpleReference (Identifier "inc" BTUnknown))) = liftM2 (\a b -> a <+> text "+=" <+> b <> semi) (expr2C e1) (expr2C e2)
phrase2C a = error $ "phrase2C: " ++ show a
wrapPhrase p@(Phrases _) = p
wrapPhrase p = Phrases [p]
expr2C :: Expression -> State RenderState Doc
expr2C (Expression s) = return $ text s
expr2C (BinOp op expr1 expr2) = do
e1 <- expr2C expr1
t1 <- gets lastType
e2 <- expr2C expr2
t2 <- gets lastType
case (op2C op, t1, t2) of
("+", BTString, BTString) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strconcat" (BTFunction BTString))
("+", BTString, BTChar) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strappend" (BTFunction BTString))
("+", BTChar, BTString) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strprepend" (BTFunction BTString))
("==", BTString, _) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strcompare" (BTFunction BTBool))
("!=", BTString, _) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strncompare" (BTFunction BTBool))
("&", BTBool, _) -> return $ parens e1 <+> text "&&" <+> parens e2
("|", BTBool, _) -> return $ parens e1 <+> text "||" <+> parens e2
(o, _, _) | o `elem` boolOps -> do
modify(\s -> s{lastType = BTBool})
return $ parens e1 <+> text o <+> parens e2
| otherwise -> return $ parens e1 <+> text o <+> parens e2
where
boolOps = ["==", "!=", "<", ">", "<=", ">="]
expr2C (NumberLiteral s) = return $ text s
expr2C (FloatLiteral s) = return $ text s
expr2C (HexNumber s) = return $ text "0x" <> (text . map toLower $ s)
expr2C (StringLiteral [a]) = do
modify(\s -> s{lastType = BTChar})
return . quotes $ text [a]
expr2C (StringLiteral s) = addStringConst s
expr2C (Reference ref) = ref2CF ref
expr2C (PrefixOp op expr) = liftM (text (op2C op) <>) (expr2C expr)
expr2C Null = return $ text "NULL"
expr2C (CharCode a) = do
modify(\s -> s{lastType = BTChar})
return $ quotes $ text "\\x" <> text (showHex (read a) "")
expr2C (HexCharCode a) = return $ quotes $ text "\\x" <> text (map toLower a)
expr2C (SetExpression ids) = mapM (id2C IOLookup) ids >>= return . parens . hcat . punctuate (text " | ")
expr2C (BuiltInFunCall [e] (SimpleReference (Identifier "ord" _))) = liftM parens $ expr2C e
expr2C (BuiltInFunCall [e] (SimpleReference (Identifier "succ" _))) = liftM (<> text " + 1") $ expr2C e
expr2C (BuiltInFunCall [e] (SimpleReference (Identifier "pred" _))) = liftM (<> text " - 1") $ expr2C e
expr2C (BuiltInFunCall params ref) = do
r <- ref2C ref
t <- gets lastType
ps <- mapM expr2C params
case t of
BTFunction t' -> do
modify (\s -> s{lastType = t'})
_ -> error $ "BuiltInFunCall lastType: " ++ show t
return $
r <> parens (hsep . punctuate (char ',') $ ps)
expr2C a = error $ "Don't know how to render " ++ show a
ref2CF :: Reference -> State RenderState Doc
ref2CF (SimpleReference name) = do
i <- id2C IOLookup name
t <- gets lastType
case t of
BTFunction _ -> return $ i <> parens empty
_ -> return $ i
ref2CF r = ref2C r
ref2C :: Reference -> State RenderState Doc
-- rewrite into proper form
ref2C (RecordField ref1 (ArrayElement exprs ref2)) = ref2C $ ArrayElement exprs (RecordField ref1 ref2)
ref2C (RecordField ref1 (Dereference ref2)) = ref2C $ Dereference (RecordField ref1 ref2)
ref2C (RecordField ref1 (RecordField ref2 ref3)) = ref2C $ RecordField (RecordField ref1 ref2) ref3
ref2C (RecordField ref1 (FunCall params ref2)) = ref2C $ FunCall params (RecordField ref1 ref2)
ref2C (ArrayElement (a:b:xs) ref) = ref2C $ ArrayElement (b:xs) (ArrayElement [a] ref)
-- conversion routines
ref2C ae@(ArrayElement [expr] ref) = do
e <- expr2C expr
r <- ref2C ref
t <- gets lastType
ns <- gets currentScope
case t of
(BTArray _ _ t') -> modify (\st -> st{lastType = t'})
(BTFunctionReturn _ (BTArray _ _ t')) -> modify (\st -> st{lastType = t'})
(BTFunctionReturn _ (BTString)) -> modify (\st -> st{lastType = BTChar})
(BTString) -> modify (\st -> st{lastType = BTChar})
(BTPointerTo t) -> do
t'' <- fromPointer (show t) =<< gets lastType
case t'' of
BTChar -> modify (\st -> st{lastType = BTChar})
a -> error $ "Getting element of " ++ show a ++ "\nReference: " ++ show ae ++ "\n" ++ show (take 100 ns)
a -> error $ "Getting element of " ++ show a ++ "\nReference: " ++ show ae ++ "\n" ++ show (take 100 ns)
case t of
BTString -> return $ r <> text ".s" <> brackets e
_ -> return $ r <> brackets e
ref2C (SimpleReference name) = id2C IOLookup name
ref2C rf@(RecordField (Dereference ref1) ref2) = do
r1 <- ref2C ref1
t <- fromPointer (show ref1) =<< gets lastType
ns <- gets currentScope
r2 <- case t of
BTRecord rs -> withRecordNamespace "" rs $ ref2C ref2
BTUnit -> withLastIdNamespace $ ref2C ref2
a -> error $ "dereferencing from " ++ show a ++ "\n" ++ show rf ++ "\n" ++ show (take 100 ns)
return $
r1 <> text "->" <> r2
ref2C rf@(RecordField ref1 ref2) = do
r1 <- ref2C ref1
t <- gets lastType
ns <- gets currentScope
r2 <- case t of
BTFunctionReturn s (BTRecord rs) -> withRecordNamespace "" rs $ ref2C ref2
BTRecord rs -> withRecordNamespace "" rs $ ref2C ref2
BTUnit -> withLastIdNamespace $ ref2C ref2
a -> error $ "dereferencing from " ++ show a ++ "\n" ++ show rf ++ "\n" ++ show (take 100 ns)
return $
r1 <> text "." <> r2
ref2C d@(Dereference ref) = do
r <- ref2C ref
t <- fromPointer (show d) =<< gets lastType
modify (\st -> st{lastType = t})
return $ (parens $ text "*" <> r)
ref2C f@(FunCall params ref) = do
r <- ref2C ref
t <- gets lastType
case t of
BTFunction t' -> do
ps <- liftM (parens . hsep . punctuate (char ',')) $ mapM expr2C params
modify (\s -> s{lastType = t'})
return $ r <> ps
BTFunctionReturn r t' -> do
ps <- liftM (parens . hsep . punctuate (char ',')) $ mapM expr2C params
modify (\s -> s{lastType = t'})
return $ text r <> ps
_ -> case (ref, params) of
(SimpleReference i, [p]) -> ref2C $ TypeCast i p
_ -> error $ "ref2C FunCall erroneous type cast detected: " ++ show f ++ "\nType detected: " ++ show t
ref2C (Address ref) = do
r <- ref2C ref
return $ text "&" <> parens r
ref2C (TypeCast t'@(Identifier i _) expr) = do
case map toLower i of
"pchar" -> ref2C $ FunCall [expr] (SimpleReference (Identifier "_pchar" $ BTPointerTo BTChar))
a -> do
e <- expr2C expr
t <- id2C IOLookup t'
return $ parens t <> e
ref2C (RefExpression expr) = expr2C expr
op2C :: String -> String
op2C "or" = "|"
op2C "and" = "&"
op2C "not" = "!"
op2C "xor" = "^"
op2C "div" = "/"
op2C "mod" = "%"
op2C "shl" = "<<"
op2C "shr" = ">>"
op2C "<>" = "!="
op2C "=" = "=="
op2C a = a