diff -r bb503cd46516 -r 379063958821 tools/pas2c/Pas2C.hs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/pas2c/Pas2C.hs	Fri Nov 09 12:29:24 2012 -0500
@@ -0,0 +1,1085 @@
+{-# 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 qualified Data.Set as Set
+import Data.List (find)
+import Numeric
+
+import PascalParser(pascalUnit)
+import PascalUnitSyntaxTree
+
+
+data InsertOption =
+    IOInsert
+    | IOInsertWithType Doc
+    | IOLookup
+    | IOLookupLast
+    | IOLookupFunction Int
+    | IODeferred
+
+data Record = Record
+    {
+        lcaseId :: String,
+        baseType :: BaseType,
+        typeDecl :: Doc
+    }
+    deriving Show
+type Records = Map.Map String [Record]
+data RenderState = RenderState
+    {
+        currentScope :: Records,
+        lastIdentifier :: String,
+        lastType :: BaseType,
+        lastIdTypeDecl :: Doc,
+        stringConsts :: [(String, String)],
+        uniqCounter :: Int,
+        toMangle :: Set.Set String,
+        currentUnit :: String,
+        currentFunctionResult :: String,
+        namespaces :: Map.Map String Records
+    }
+
+rec2Records = map (\(a, b) -> Record a b empty)
+
+emptyState = RenderState Map.empty "" BTUnknown empty [] 0 Set.empty "" ""
+
+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 '\\' 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 "static const string255" <+> (text a) <+> text "=" <+> strInit b <> semi))
+    $ gets stringConsts
+
+docToLower :: Doc -> Doc
+docToLower = text . map toLower . render
+
+pas2C :: String -> String -> String -> String -> IO ()
+pas2C fn inputPath outputPath alternateInputPath = do
+    s <- flip execStateT initState $ f fn
+    renderCFiles s outputPath
+    where
+    printLn = liftIO . hPutStrLn stdout
+    print = liftIO . hPutStr stdout
+    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 inputPath alternateInputPath (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 (outputPath ++ "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 -> String -> IO ()
+renderCFiles units outputPath = do
+    let u = Map.toList units
+    let nss = Map.map (toNamespace nss) units
+    --hPutStrLn stderr $ "Units: " ++ (show . Map.keys . Map.filter (not . Map.null) $ nss)
+    --writeFile "pas2c.log" $ unlines . map (\t -> show (fst t) ++ "\n" ++ (unlines . map ((:) '\t' . show) . snd $ t)) . Map.toList $ nss
+    mapM_ (toCFiles outputPath nss) u
+    where
+    toNamespace :: Map.Map String Records -> PascalUnit -> Records
+    toNamespace nss (System tvs) =
+        currentScope $ execState f (emptyState nss)
+        where
+        f = do
+            checkDuplicateFunDecls tvs
+            mapM_ (tvar2C True False True False) tvs
+    toNamespace nss (Redo tvs) = -- functions that are re-implemented, add prefix to all of them
+        currentScope $ execState f (emptyState nss){currentUnit = "fpcrtl_"}
+        where
+        f = do
+            checkDuplicateFunDecls tvs
+            mapM_ (tvar2C True False True False) tvs
+    toNamespace _ (Program {}) = Map.empty
+    toNamespace nss (Unit (Identifier i _) interface _ _ _) =
+        currentScope $ execState (interface2C interface True) (emptyState nss){currentUnit = map toLower i ++ "_"}
+
+
+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 f = do
+    li <- gets lastIdentifier
+    nss <- gets namespaces
+    withState' (\st -> st{currentScope = fromMaybe Map.empty $ Map.lookup li (namespaces st)}) f
+
+withRecordNamespace :: String -> [Record] -> State RenderState Doc -> State RenderState Doc
+withRecordNamespace _ [] = error "withRecordNamespace: empty record"
+withRecordNamespace prefix recs = withState' f
+    where
+        f st = st{currentScope = Map.unionWith un records (currentScope st), currentUnit = ""}
+        records = Map.fromList $ map (\(Record a b d) -> (map toLower a, [Record (prefix ++ a) b d])) recs
+        un [a] b = a : b
+
+toCFiles :: String -> Map.Map String Records -> (String, PascalUnit) -> IO ()
+toCFiles _ _ (_, System _) = return ()
+toCFiles _ _ (_, Redo _) = return ()
+toCFiles outputPath ns p@(fn, pu) = do
+    hPutStrLn stdout $ "Rendering '" ++ fn ++ "'..."
+    toCFiles' p
+    where
+    toCFiles' (fn, p@(Program {})) = writeFile (outputPath ++ fn ++ ".c") $ "#include \"fpcrtl.h\"\n" ++ (render2C initialState . pascal2C) p
+    toCFiles' (fn, (Unit unitId@(Identifier i _) interface implementation _ _)) = do
+        let (a, s) = runState (id2C IOInsert (setBaseType BTUnit unitId) >> interface2C interface True) initialState{currentUnit = map toLower i ++ "_"}
+            (a', s') = runState (id2C IOInsert (setBaseType BTUnit unitId) >> interface2C interface False) initialState{currentUnit = map toLower i ++ "_"}
+        writeFile (outputPath ++ fn ++ ".h") $ "#pragma once\n\n#include \"pas2c.h\"\n\n" ++ (render (a $+$ text ""))
+        writeFile (outputPath ++ fn ++ ".c") $ "#include \"fpcrtl.h\"\n\n#include \"" ++ fn ++ ".h\"\n" ++ render (a' $+$ text "") ++ (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", "pas2cRedo"] ++ uses2List uses
+usesFiles (Unit _ (Interface uses1 _) (Implementation uses2 _) _ _) = ["pas2cSystem", "pas2cRedo"] ++ uses2List uses1 ++ uses2List uses2
+usesFiles (System {}) = []
+usesFiles (Redo {}) = []
+
+pascal2C :: PascalUnit -> State RenderState Doc
+pascal2C (Unit _ interface implementation init fin) =
+    liftM2 ($+$) (interface2C interface True) (implementation2C implementation)
+
+pascal2C (Program _ implementation mainFunction) = do
+    impl <- implementation2C implementation
+    [main] <- tvar2C True False True True (FunctionDeclaration (Identifier "main" BTInt) False (SimpleType $ Identifier "int" BTInt) [VarDeclaration False False ([Identifier "argc" BTInt], SimpleType (Identifier "Integer" BTInt)) Nothing, VarDeclaration False False ([Identifier "argv" BTUnknown], SimpleType (Identifier "PPChar" BTUnknown)) Nothing] (Just (TypesAndVars [], mainFunction)))
+    return $ impl $+$ main
+
+
+-- the second bool indicates whether do normal interface translation or generate variable declarations
+-- that will be inserted into implementation files
+interface2C :: Interface -> Bool -> State RenderState Doc
+interface2C (Interface uses tvars) True = do
+    u <- uses2C uses
+    tv <- typesAndVars2C True True True tvars
+    r <- renderStringConsts
+    return (u $+$ r $+$ tv)
+interface2C (Interface uses tvars) False = do
+    u <- uses2C uses
+    tv <- typesAndVars2C True False False tvars
+    r <- renderStringConsts
+    return tv
+
+implementation2C :: Implementation -> State RenderState Doc
+implementation2C (Implementation uses tvars) = do
+    u <- uses2C uses
+    tv <- typesAndVars2C True False True tvars
+    r <- renderStringConsts
+    return (u $+$ r $+$ tv)
+
+checkDuplicateFunDecls :: [TypeVarDeclaration] -> State RenderState ()
+checkDuplicateFunDecls tvs =
+    modify $ \s -> s{toMangle = Map.keysSet . Map.filter (> 1) . foldr ins initMap $ tvs}
+    where
+        initMap = Map.empty
+        --initMap = Map.fromList [("reset", 2)]
+        ins (FunctionDeclaration (Identifier i _) _ _ _ _) m = Map.insertWith (+) (map toLower i) 1 m
+        ins _ m = m
+
+-- the second bool indicates whether declare variable as extern or not
+-- the third bool indicates whether include types or not
+
+typesAndVars2C :: Bool -> Bool -> Bool -> TypesAndVars -> State RenderState Doc
+typesAndVars2C b externVar includeType(TypesAndVars ts) = do
+    checkDuplicateFunDecls ts
+    liftM (vcat . map (<> semi) . concat) $ mapM (tvar2C b externVar includeType False) 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_ injectNamespace (Identifier "pas2cRedo" 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)
+        modify (\s -> s{currentScope = Map.unionWith (++) (fromMaybe Map.empty (getNS i)) $ currentScope s})
+
+uses2List :: Uses -> [String]
+uses2List (Uses ids) = map (\(Identifier i _) -> i) ids
+
+
+setLastIdValues vv = (\s -> s{lastType = baseType vv, lastIdentifier = lcaseId vv, lastIdTypeDecl = typeDecl vv})
+
+id2C :: InsertOption -> Identifier -> State RenderState Doc
+id2C IOInsert i = id2C (IOInsertWithType empty) i
+id2C (IOInsertWithType d) (Identifier i t) = do
+    ns <- gets currentScope
+    tom <- gets (Set.member n . toMangle)
+    cu <- gets currentUnit
+    let (i', t') = case (t, tom) of
+            (BTFunction _ p _, True) -> (cu ++ i ++ ('_' : show p), t)
+            (BTFunction _ _ _, _) -> (cu ++ i, t)
+            (BTVarParam t', _) -> ('(' : '*' : i ++ ")" , t')
+            _ -> (i, t)
+    modify (\s -> s{currentScope = Map.insertWith (++) n [Record i' t' d] (currentScope s), lastIdentifier = n})
+    return $ text i'
+    where
+        n = map toLower i
+
+id2C IOLookup i = id2CLookup head i
+id2C IOLookupLast i = id2CLookup last i
+id2C (IOLookupFunction params) (Identifier i t) = do
+    let i' = map toLower i
+    v <- gets $ Map.lookup i' . currentScope
+    lt <- gets lastType
+    if isNothing v then
+        error $ "Not defined: '" ++ i' ++ "'\n" ++ show lt ++ "\nwith num of params = " ++ show params ++ "\n" ++ show v
+        else
+        let vv = fromMaybe (head $ fromJust v) . find checkParam $ fromJust v in
+            modify (setLastIdValues vv) >> (return . text . lcaseId $ vv)
+    where
+        checkParam (Record _ (BTFunction _ p _) _) = p == params
+        checkParam _ = False
+id2C IODeferred (Identifier i t) = do
+    let i' = map toLower i
+    v <- gets $ Map.lookup i' . currentScope
+    if (isNothing v) then
+        modify (\s -> s{lastType = BTUnknown, lastIdentifier = i}) >> return (text i)
+        else
+        let vv = head $ fromJust v in modify (setLastIdValues vv) >> (return . text . lcaseId $ vv)
+
+id2CLookup :: ([Record] -> Record) -> Identifier -> State RenderState Doc
+id2CLookup f (Identifier i t) = do
+    let i' = map toLower i
+    v <- gets $ Map.lookup i' . currentScope
+    lt <- gets lastType
+    if isNothing v then
+        error $ "Not defined: '" ++ i' ++ "'\n" ++ show lt
+        else
+        let vv = f $ fromJust v in modify (setLastIdValues vv) >> (return . text . lcaseId $ vv)
+
+
+id2CTyped :: TypeDecl -> Identifier -> State RenderState Doc
+id2CTyped = id2CTyped2 Nothing
+
+id2CTyped2 :: Maybe Doc -> TypeDecl -> Identifier -> State RenderState Doc
+id2CTyped2 md t (Identifier i _) = do
+    tb <- resolveType t
+    case (t, tb) of
+        (_, BTUnknown) -> do
+            error $ "id2CTyped: type BTUnknown for " ++ show i ++ "\ntype: " ++ show t
+        (SimpleType {}, BTRecord _ r) -> do
+            ts <- type2C t
+            id2C (IOInsertWithType $ ts empty) (Identifier i (BTRecord (render $ ts empty) r))
+        (_, BTRecord _ r) -> do
+            ts <- type2C t
+            id2C (IOInsertWithType $ ts empty) (Identifier i (BTRecord i r))
+        _ -> case md of
+                Nothing -> id2C IOInsert (Identifier i tb)
+                Just ts -> id2C (IOInsertWithType ts) (Identifier i tb)
+
+
+resolveType :: TypeDecl -> State RenderState BaseType
+resolveType st@(SimpleType (Identifier i _)) = do
+    let i' = map toLower i
+    v <- gets $ Map.lookup i' . currentScope
+    if isJust v then return . baseType . head $ 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 a) = liftM (BTFunction False (length a)) $ 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 _ e)) = initExpr2C e >> gets lastType
+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
+resolveType (VarParamType t) = liftM BTVarParam $ resolveType t
+
+
+resolve :: String -> BaseType -> State RenderState BaseType
+resolve s (BTUnresolved t) = do
+    v <- gets $ Map.lookup t . currentScope
+    if isJust v then
+        resolve s . baseType . head . 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 t = do
+    error $ "Dereferencing from non-pointer type " ++ show t ++ "\n" ++ s
+
+
+functionParams2C params = liftM (hcat . punctuate comma . concat) $ mapM (tvar2C False False True True) params
+
+numberOfDeclarations :: [TypeVarDeclaration] -> Int
+numberOfDeclarations = sum . map cnt
+    where
+        cnt (VarDeclaration _ _ (ids, _) _) = length ids
+        cnt _ = 1
+
+hasPassByReference :: [TypeVarDeclaration] -> Bool
+hasPassByReference = or . map isVar
+    where
+        isVar (VarDeclaration v _ (_, _) _) = v
+        isVar _ = error $ "hasPassByReference called not on function parameters"
+
+toIsVarList :: [TypeVarDeclaration] -> [Bool]
+toIsVarList = concatMap isVar
+    where
+        isVar (VarDeclaration v _ (p, _) _) = replicate (length p) v
+        isVar _ = error $ "toIsVarList called not on function parameters"
+
+
+funWithVarsToDefine :: String -> [TypeVarDeclaration] -> Doc
+funWithVarsToDefine n params = text "#define" <+> text n <> parens abc <+> text (n ++ "__vars") <> parens cparams
+    where
+        abc = hcat . punctuate comma . map (char . fst) $ ps
+        cparams = hcat . punctuate comma . map (\(c, v) -> if v then char '&' <> parens (char c) else char c) $ ps
+        ps = zip ['a'..] (toIsVarList params)
+
+fun2C :: Bool -> String -> TypeVarDeclaration -> State RenderState [Doc]
+fun2C _ _ (FunctionDeclaration name inline returnType params Nothing) = do
+    t <- type2C returnType
+    t'<- gets lastType
+    p <- withState' id $ functionParams2C params
+    n <- liftM render . id2C IOInsert $ setBaseType (BTFunction hasVars (numberOfDeclarations params) t') name
+    let decor = if inline then text "inline" else empty
+    if hasVars then
+        return [funWithVarsToDefine n params $+$ decor <+> t empty <+> text (n ++ "__vars") <> parens p]
+        else
+        return [decor <+> t empty <+> text n <> parens p]
+    where
+        hasVars = hasPassByReference params
+
+
+fun2C True rv (FunctionDeclaration name@(Identifier i _) inline returnType params (Just (tvars, phrase))) = do
+    let res = docToLower $ text rv <> text "_result"
+    t <- type2C returnType
+    t'<- gets lastType
+
+    notDeclared <- liftM isNothing . gets $ Map.lookup (map toLower i) . currentScope
+
+    n <- liftM render . id2C IOInsert $ setBaseType (BTFunction hasVars (numberOfDeclarations params) t') name
+
+    let isVoid = case returnType of
+            VoidType -> True
+            _ -> False
+
+    (p, ph) <- withState' (\st -> st{currentScope = Map.insertWith un (map toLower rv) [Record (render res) t' empty] $ currentScope st
+            , currentFunctionResult = if isVoid then [] else render res}) $ do
+        p <- functionParams2C params
+        ph <- liftM2 ($+$) (typesAndVars2C False False True tvars) (phrase2C' phrase)
+        return (p, ph)
+
+    let phrasesBlock = if isVoid then ph else t empty <+> res <> semi $+$ ph $+$ text "return" <+> res <> semi
+    let define = if hasVars then text "#ifndef" <+> text n $+$ funWithVarsToDefine n params $+$ text "#endif" else empty
+    let decor = if inline then text "inline" else empty
+    return [
+        define
+        $+$
+        --(if notDeclared && hasVars then funWithVarsToDefine n params else empty) $+$
+        decor <+> t empty <+> text (if hasVars then n ++ "__vars" else n) <> parens p
+        $+$
+        text "{"
+        $+$
+        nest 4 phrasesBlock
+        $+$
+        text "}"]
+    where
+    phrase2C' (Phrases p) = liftM vcat $ mapM phrase2C p
+    phrase2C' p = phrase2C p
+    un [a] b = a : b
+    hasVars = hasPassByReference params
+
+fun2C False _ (FunctionDeclaration (Identifier name _) _ _ _ _) = error $ "nested functions not allowed: " ++ name
+fun2C _ tv _ = error $ "fun2C: I don't render " ++ show tv
+
+-- the second bool indicates whether declare variable as extern or not
+-- the third bool indicates whether include types or not
+-- the fourth bool indicates whether ignore initialization or not (basically for dynamic arrays since we cannot do initialization in function params)
+tvar2C :: Bool -> Bool -> Bool -> Bool -> TypeVarDeclaration -> State RenderState [Doc]
+tvar2C b _ includeType _ f@(FunctionDeclaration (Identifier name _) _ _ _ _) = do
+    t <- fun2C b name f
+    if includeType then return t else return []
+tvar2C _ _ includeType _ td@(TypeDeclaration i' t) = do
+    i <- id2CTyped t i'
+    tp <- type2C t
+    return $ if includeType then [text "typedef" <+> tp i] else []
+
+tvar2C _ _ _ _ (VarDeclaration True _ (ids, t) Nothing) = do
+    t' <- liftM ((empty <+>) . ) $ type2C t
+    liftM (map(\i -> t' i)) $ mapM (id2CTyped2 (Just $ t' empty) (VarParamType t)) ids
+
+tvar2C _ externVar includeType ignoreInit (VarDeclaration _ isConst (ids, t) mInitExpr) = do
+    t' <- liftM (((if isConst then text "static const" else if externVar 
+                                                                then text "extern"
+                                                                else empty)
+                   <+>) . ) $ type2C t
+    ie <- initExpr mInitExpr
+    lt <- gets lastType
+    case (isConst, lt, ids, mInitExpr) of
+         (True, BTInt, [i], Just _) -> do
+             i' <- id2CTyped t i
+             return $ if includeType then [text "enum" <> braces (i' <+> ie)] else []
+         (True, BTFloat, [i], Just e) -> do
+             i' <- id2CTyped t i
+             ie <- initExpr2C e
+             return $ if includeType then [text "#define" <+> i' <+> parens ie <> text "\n"] else []
+         (_, BTFunction{}, _, Nothing) -> liftM (map(\i -> t' i)) $ mapM (id2CTyped t) ids
+         (_, BTArray r _ _, [i], _) -> do
+            i' <- id2CTyped t i
+            ie' <- return $ case (r, mInitExpr, ignoreInit) of
+                (RangeInfinite, Nothing, False) -> text "= NULL" -- force dynamic array to be initialized as NULL if not initialized at all
+                (_, _, _) -> ie
+            result <- liftM (map(\i -> varDeclDecision isConst includeType (t' i) ie')) $ mapM (id2CTyped t) ids           
+            case (r, ignoreInit) of
+                (RangeInfinite, False) -> 
+                    -- if the array is dynamic, add dimension info to it
+                    return $ [dimDecl] ++ result
+                    where 
+                        arrayDimStr = show $ arrayDimension t
+                        arrayDimInitExp = text ("={" ++ ".dim = " ++ arrayDimStr ++ ", .a = {0, 0, 0, 0}}")
+                        dimDecl = varDeclDecision isConst includeType (text "fpcrtl_dimension_t" <+>  i' <> text "_dimension_info") arrayDimInitExp
+                    
+                (_, _) -> return result
+            
+         _ -> liftM (map(\i -> varDeclDecision isConst includeType (t' i) ie)) $ mapM (id2CTyped2 (Just $ t' empty) t) ids
+    where
+    initExpr Nothing = return $ empty
+    initExpr (Just e) = liftM (text "=" <+>) (initExpr2C e)
+    varDeclDecision True True varStr expStr = varStr <+> expStr
+    varDeclDecision False True varStr expStr = if externVar then varStr else varStr <+> expStr
+    varDeclDecision False False varStr expStr = varStr <+> expStr
+    varDeclDecision True False varStr expStr = empty
+    arrayDimension a = case a of
+        ArrayDecl Nothing t -> let a = arrayDimension t in if a > 3 then error "Dynamic array with dimension > 4 is not supported." else 1 + arrayDimension t
+        ArrayDecl _ _ -> error "Mixed dynamic array and static array are not supported."
+        _ -> 0
+
+tvar2C f _ _ _ (OperatorDeclaration op (Identifier i _) inline ret params body) = do
+    r <- op2CTyped op (extractTypes params)
+    fun2C f i (FunctionDeclaration r inline 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 $ Identifier (t' ++ "_op_" ++ opStr) bt
+    where
+    opStr = case op of
+                    "+" -> "add"
+                    "-" -> "sub"
+                    "*" -> "mul"
+                    "/" -> "div"
+                    "/(float)" -> "div"
+                    "=" -> "eq"
+                    "<" -> "lt"
+                    ">" -> "gt"
+                    "<>" -> "neq"
+                    _ -> 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, initExpr2C' :: InitExpression -> State RenderState Doc
+initExpr2C (InitArray values) = liftM (braces . vcat . punctuate comma) $ mapM initExpr2C values
+initExpr2C a = initExpr2C' a
+initExpr2C' InitNull = return $ text "NULL"
+initExpr2C' (InitAddress expr) = do
+    ie <- initExpr2C' expr
+    lt <- gets lastType
+    case lt of
+        BTFunction True _ _ -> return $ text "&" <> ie <> text "__vars"
+        _ -> return $ text "&" <> ie
+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' 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
+
+baseType2C :: String -> BaseType -> Doc
+baseType2C _ BTFloat = text "float"
+baseType2C _ BTBool = text "bool"
+baseType2C _ BTString = text "string255"
+baseType2C s a = error $ "baseType2C: " ++ show a ++ "\n" ++ s
+
+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)) = do
+        i' <- id2C IODeferred i
+        lt <- gets lastType
+        case lt of
+             BTRecord _ _ -> return $ \a -> text "struct __" <> i' <+> text "*" <+> a
+             BTUnknown -> return $ \a -> text "struct __" <> i' <+> text "*" <+> a
+             _ -> return $ \a -> i' <+> text "*" <+> a
+    type2C' (PointerTo t) = liftM (\t a -> t (parens $ text "*" <> a)) $ type2C t
+    type2C' (RecordType tvs union) = do
+        t <- withState' f $ mapM (tvar2C False False True False) tvs
+        u <- unions
+        return $ \i -> text "struct __" <> i <+> lbrace $+$ nest 4 ((vcat . map (<> semi) . concat $ t) $$ u) $+$ rbrace <+> i
+        where
+            f s = s{currentUnit = ""}
+            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' f $ mapM (tvar2C False False True 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 [0..]) <+>)
+        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
+        lt <- gets lastType
+        ft <- case lt of
+                -- BTFunction {} -> type2C (PointerTo t)
+                _ -> return t'
+        r' <- initExpr2C (InitRange r)
+        return $ \i -> ft 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 <> (parens $ text "*" <> i) <> parens p))
+    type2C' (DeriveType (InitBinOp _ _ i)) = type2C' (DeriveType i)
+    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 r@(InitReference {})) = do
+        initExpr2C r
+        t <- gets lastType
+        return (baseType2C (show r) t <+>)
+    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
+    case (t, expr) of
+        (BTFunction {}, (Reference r')) -> do
+            e <- ref2C r'
+            return $ r <+> text "=" <+> e <> semi
+        (BTString, _) -> do
+            e <- expr2C expr
+            lt <- gets lastType
+            case lt of
+                -- assume pointer to char for simplicity
+                BTPointerTo _ -> do
+                    e <- expr2C $ Reference $ FunCall [Reference $ RefExpression expr] (SimpleReference (Identifier "pchar2str" BTUnknown))
+                    return $ r <+> text "=" <+> e <> semi
+                BTString -> do
+                    e <- expr2C expr
+                    return $ r <+> text "=" <+> e <> semi
+                _ -> error $ "Assignment to string from " ++ show lt
+        (BTArray _ _ _, _) -> do
+            case expr of
+                Reference er -> do
+                    exprRef <- ref2C er
+                    exprT <- gets lastType
+                    case exprT of
+                        BTArray RangeInfinite _ _ ->
+                            return $ text "FIXME: assign a dynamic array to an array"
+                        BTArray _ _ _ -> phrase2C $
+                                ProcCall (FunCall
+                                    [
+                                    Reference $ ref
+                                    , Reference $ RefExpression expr
+                                    , Reference $ FunCall [expr] (SimpleReference (Identifier "sizeof" BTUnknown))
+                                    ]
+                                    (SimpleReference (Identifier "memcpy" BTUnknown))
+                                    ) []
+                        _ -> return $ text "FIXME: assign a non-specific value to an array"
+
+                _ -> return $ text "FIXME: dynamic array assignment 2"
+        _ -> do
+            e <- 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 [text "default: break;"] -- avoid compiler warning
+         | 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 ++ ".") (rec2Records rs) $ phrase2C $ wrapPhrase p
+        a -> do
+            error $ "'with' block referencing non-record type " ++ show a ++ "\n" ++ show wb
+phrase2C (ForCycle i' e1' e2' p up) = do
+    i <- id2C IOLookup i'
+    iType <- gets lastIdTypeDecl
+    e1 <- expr2C e1'
+    e2 <- expr2C e2'
+    let inc = if up then "inc" else "dec"
+    let add = if up then "+ 1" else "- 1"
+    let iEnd = i <> text "__end__"
+    ph <- phrase2C . appendPhrase (BuiltInFunctionCall [Reference $ SimpleReference i'] (SimpleReference (Identifier inc BTUnknown))) $ wrapPhrase p
+    return . braces $
+        i <+> text "=" <+> e1 <> semi
+        $$
+        iType <+> iEnd <+> text "=" <+> e2 <> semi
+        $$ 
+        text "if" <+> (parens $ i <+> text "<=" <+> iEnd) <+> text "do" <+> ph <+>
+        text "while" <> parens (i <+> text "!=" <+> iEnd <+> text add) <> semi
+    where
+        appendPhrase p (Phrases ps) = Phrases $ ps ++ [p]
+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))) = do
+    f <- gets currentFunctionResult
+    if null f then
+        return $ text "return" <> semi
+        else
+        return $ text "return" <+> text f <> semi
+phrase2C (BuiltInFunctionCall [] (SimpleReference (Identifier "break" BTUnknown))) = return $ text "break" <> semi
+phrase2C (BuiltInFunctionCall [] (SimpleReference (Identifier "continue" BTUnknown))) = return $ text "continue" <> 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 b@(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 False 2 BTString))
+        ("+", BTString, BTChar) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strappend" (BTFunction False 2 BTString))
+        ("+", BTChar, BTString) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strprepend" (BTFunction False 2 BTString))
+        ("+", BTChar, BTChar) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_chrconcat" (BTFunction False 2 BTString))
+        ("==", BTString, BTChar) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strcomparec" (BTFunction False 2 BTBool))
+        ("==", BTString, BTString) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strcompare" (BTFunction False 2 BTBool))
+        ("!=", BTString, _) -> expr2C $ BuiltInFunCall [expr1, expr2] (SimpleReference $ Identifier "_strncompare" (BTFunction False 2 BTBool))
+        ("&", BTBool, _) -> return $ parens e1 <+> text "&&" <+> parens e2
+        ("|", BTBool, _) -> return $ parens e1 <+> text "||" <+> parens e2
+        (_, BTRecord t1 _, BTRecord t2 _) -> do
+            i <- op2CTyped op [SimpleType (Identifier t1 undefined), SimpleType (Identifier t2 undefined)]
+            ref2C $ FunCall [expr1, expr2] (SimpleReference i)
+        (_, BTRecord t1 _, BTInt) -> do
+            -- aw, "LongInt" here is hwengine-specific hack
+            i <- op2CTyped op [SimpleType (Identifier t1 undefined), SimpleType (Identifier "LongInt" undefined)]
+            ref2C $ FunCall [expr1, expr2] (SimpleReference i)
+        ("in", _, _) ->
+            case expr2 of
+                 SetExpression set -> do
+                     ids <- mapM (id2C IOLookup) set
+                     modify(\s -> s{lastType = BTBool})
+                     return . parens . hcat . punctuate (text " || ") . map (\i -> parens $ e1 <+> text "==" <+> i) $ ids
+                 _ -> error "'in' against not set expression"
+        (o, _, _) | o `elem` boolOps -> do
+                        modify(\s -> s{lastType = BTBool})
+                        return $ parens e1 <+> text o <+> parens e2
+                  | otherwise -> do
+                        o' <- return $ case o of
+                            "/(float)" -> text "/(float)" -- pascal returns real value
+                            _ -> text o
+                        e1' <- return $ case (o, t1, t2) of
+                                ("-", BTInt, BTInt) -> parens $ text "(int64_t)" <+> parens e1
+                                _ -> parens e1
+                        e2' <- return $ case (o, t1, t2) of
+                                ("-", BTInt, BTInt) -> parens $ text "(int64_t)" <+> parens e2
+                                _ -> parens e2
+                        return $ e1' <+> o' <+> e2'
+    where
+        boolOps = ["==", "!=", "<", ">", "<=", ">="]
+expr2C (NumberLiteral s) = do
+    modify(\s -> s{lastType = BTInt})
+    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 $ escape a
+    where
+        escape '\'' = "\\\'"
+        escape a = [a]-}
+expr2C (StringLiteral s) = addStringConst s
+expr2C (PCharLiteral s) = return . doubleQuotes $ text s
+expr2C (Reference ref) = ref2CF ref
+expr2C (PrefixOp op expr) = do
+    e <- expr2C expr
+    lt <- gets lastType
+    case lt of
+        BTRecord t _ -> do
+            i <- op2CTyped op [SimpleType (Identifier t undefined)]
+            ref2C $ FunCall [expr] (SimpleReference i)
+        BTBool -> do
+            o <- return $ case op of
+                     "not" -> text "!"
+                     _ -> text (op2C op)
+            return $ o <> parens e
+        _ -> return $ text (op2C op) <> parens e
+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) = if length a <= 2 then return $ quotes $ text "\\x" <> text (map toLower a) else expr2C $ HexNumber a
+expr2C (SetExpression ids) = mapM (id2C IOLookup) ids >>= return . parens . hcat . punctuate (text " | ")
+
+expr2C (BuiltInFunCall [e] (SimpleReference (Identifier "low" _))) = do
+    e' <- liftM (map toLower . render) $ expr2C e
+    lt <- gets lastType
+    case lt of
+         BTEnum a -> return $ int 0
+         BTInt -> case e' of
+                  "longint" -> return $ int (-2147483648)
+         BTArray {} -> return $ int 0
+         _ -> error $ "BuiltInFunCall 'low' from " ++ show e ++ "\ntype: " ++ show lt
+expr2C (BuiltInFunCall [e] (SimpleReference (Identifier "high" _))) = do
+    e' <- liftM (map toLower . render) $ expr2C e
+    lt <- gets lastType
+    case lt of
+         BTEnum a -> return . int $ length a - 1
+         BTInt -> case e' of
+                  "longint" -> return $ int (2147483647)
+         BTString -> return $ int 255
+         BTArray (RangeFromTo _ n) _ _ -> initExpr2C n
+         _ -> error $ "BuiltInFunCall 'high' from " ++ show e ++ "\ntype: " ++ show lt
+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 " - (int64_t)1") $ expr2C e
+expr2C (BuiltInFunCall [e] (SimpleReference (Identifier "length" _))) = do
+    e' <- expr2C e
+    lt <- gets lastType
+    modify (\s -> s{lastType = BTInt})
+    case lt of
+         BTString -> return $ text "fpcrtl_Length" <> parens e'
+         BTArray RangeInfinite _ _ -> error $ "length() called on variable size array " ++ show e'
+         BTArray (RangeFromTo _ n) _ _ -> initExpr2C (BuiltInFunction "succ" [n])
+         _ -> error $ "length() called on " ++ show lt
+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 _ _ rt -> do
+             modify(\s -> s{lastType = rt})
+             return $ i <> parens empty --xymeng: removed parens
+         _ -> return $ i
+ref2CF r@(RecordField (SimpleReference _) (SimpleReference _)) = do
+    i <- ref2C r
+    t <- gets lastType
+    case t of
+         BTFunction _ _ rt -> do
+             modify(\s -> s{lastType = rt})
+             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
+    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
+         a -> error $ "Getting element of " ++ show a ++ "\nReference: " ++ show ae
+    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
+    r2 <- case t of
+        BTRecord _ rs -> withRecordNamespace "" (rec2Records rs) $ ref2C ref2
+        BTUnit -> error "What??"
+        a -> error $ "dereferencing from " ++ show a ++ "\n" ++ show rf
+    return $
+        r1 <> text "->" <> r2
+ref2C rf@(RecordField ref1 ref2) = do
+    r1 <- ref2C ref1
+    t <- gets lastType
+    case t of
+        BTRecord _ rs -> do
+            r2 <- withRecordNamespace "" (rec2Records rs) $ ref2C ref2
+            return $ r1 <> text "." <> r2
+        BTUnit -> withLastIdNamespace $ ref2C ref2
+        a -> error $ "dereferencing from " ++ show a ++ "\n" ++ show rf
+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 <- fref2C 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
+        _ -> case (ref, params) of
+                  (SimpleReference i, [p]) -> ref2C $ TypeCast i p
+                  _ -> error $ "ref2C FunCall erroneous type cast detected: " ++ show f ++ "\nType detected: " ++ show t
+    where
+    fref2C (SimpleReference name) = id2C (IOLookupFunction $ length params) name
+    fref2C a = ref2C a
+
+ref2C (Address ref) = do
+    r <- ref2C ref
+    lt <- gets lastType
+    case lt of
+        BTFunction True _ _ -> return $ text "&" <> parens (r <> text "__vars")
+        _ -> return $ text "&" <> parens r
+ref2C (TypeCast t'@(Identifier i _) expr) = do
+    lt <- expr2C expr >> gets lastType
+    case (map toLower i, lt) of
+        ("pchar", BTString) -> ref2C $ FunCall [expr] (SimpleReference (Identifier "_pchar" $ BTPointerTo BTChar))
+        ("shortstring", BTPointerTo _) -> ref2C $ FunCall [expr] (SimpleReference (Identifier "pchar2str" $ BTString))
+        (a, _) -> do
+            e <- expr2C expr
+            t <- id2C IOLookup t'
+            return . parens $ 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 "/" = "/(float)"
+op2C a = a
+