author | koda |
Sat, 26 Nov 2011 11:37:25 +0100 | |
changeset 6430 | 93eefff23bcd |
parent 6425 | 1ef4192aa80d |
child 6450 | 14224c9b4594 |
permissions | -rw-r--r-- |
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module Pas2C where |
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import PascalParser |
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import Text.PrettyPrint.HughesPJ |
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import Data.Maybe |
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import Data.Char |
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import Text.Parsec.Prim |
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import Control.Monad.State |
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import System.IO |
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import System.Directory |
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import Control.Monad.IO.Class |
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import PascalPreprocessor |
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import Control.Exception |
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import System.IO.Error |
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import qualified Data.Map as Map |
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pas2C :: String -> IO () |
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pas2C fn = do |
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setCurrentDirectory "../hedgewars/" |
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flip evalStateT initState $ f fn |
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where |
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printLn = liftIO . hPutStrLn stderr |
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initState = Map.empty |
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f :: String -> StateT (Map.Map String PascalUnit) IO () |
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f fileName = do |
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processed <- gets $ Map.member fileName |
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unless processed $ do |
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fc' <- liftIO |
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$ tryJust (guard . isDoesNotExistError) |
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$ hPutStr stderr ("Preprocessing '" ++ fileName ++ ".pas'... ") >> preprocess (fileName ++ ".pas") |
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case fc' of |
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(Left a) -> printLn "doesn't exist" |
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(Right fc) -> do |
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printLn "ok" |
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let ptree = parse pascalUnit fileName fc |
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case ptree of |
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(Left a) -> do |
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liftIO $ writeFile "preprocess.out" fc |
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printLn $ show a ++ "\nsee preprocess.out for preprocessed source" |
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fail "stop" |
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(Right a) -> do |
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modify (Map.insert fileName a) |
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mapM_ f (usesFiles a) |
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usesFiles :: PascalUnit -> [String] |
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usesFiles (Program _ (Implementation uses _) _) = uses2List uses |
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usesFiles (Unit _ (Interface uses1 _) (Implementation uses2 _) _ _) = uses2List uses1 ++ uses2List uses2 |
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pascal2C :: PascalUnit -> Doc |
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pascal2C (Unit unitName interface implementation init fin) = |
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interface2C interface |
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$+$ |
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implementation2C implementation |
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pascal2C (Program _ implementation mainFunction) = |
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implementation2C implementation |
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$+$ |
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tvar2C (FunctionDeclaration (Identifier "main") (SimpleType $ Identifier "int") [] (Just (TypesAndVars [], mainFunction))) |
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interface2C :: Interface -> Doc |
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interface2C (Interface uses tvars) = uses2C uses $+$ typesAndVars2C tvars |
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implementation2C :: Implementation -> Doc |
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implementation2C (Implementation uses tvars) = uses2C uses $+$ typesAndVars2C tvars |
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typesAndVars2C :: TypesAndVars -> Doc |
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typesAndVars2C (TypesAndVars ts) = vcat $ map tvar2C ts |
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uses2C :: Uses -> Doc |
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uses2C uses = vcat $ map (\i -> text $ "#include \"" ++ i ++ ".h\"") $ uses2List uses |
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uses2List :: Uses -> [String] |
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uses2List (Uses ids) = map (\(Identifier i) -> i) ids |
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tvar2C :: TypeVarDeclaration -> Doc |
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tvar2C (FunctionDeclaration (Identifier name) returnType params Nothing) = |
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type2C returnType <+> text (name ++ "();") |
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tvar2C (FunctionDeclaration (Identifier name) returnType params (Just (tvars, phrase))) = |
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type2C returnType <+> text (name ++ "()") |
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$+$ |
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text "{" |
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$+$ nest 4 ( |
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typesAndVars2C tvars |
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$+$ |
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phrase2C' phrase |
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) |
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$+$ |
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text "}" |
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where |
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phrase2C' (Phrases p) = vcat $ map phrase2C p |
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phrase2C' p = phrase2C p |
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tvar2C (TypeDeclaration (Identifier i) t) = text "type" <+> text i <+> type2C t <> text ";" |
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tvar2C (VarDeclaration isConst (ids, t) mInitExpr) = |
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if isConst then text "const" else empty |
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<+> |
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99 |
type2C t |
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<+> |
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(hsep . punctuate (char ',') . map (\(Identifier i) -> text i) $ ids) |
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<+> |
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initExpr mInitExpr |
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<> |
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text ";" |
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where |
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initExpr Nothing = empty |
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initExpr (Just e) = text "=" <+> initExpr2C e |
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initExpr2C :: InitExpression -> Doc |
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initExpr2C (InitBinOp op expr1 expr2) = parens $ (initExpr2C expr1) <+> op2C op <+> (initExpr2C expr2) |
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initExpr2C (InitNumber s) = text s |
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initExpr2C (InitFloat s) = text s |
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initExpr2C (InitHexNumber s) = text "0x" <> (text . map toLower $ s) |
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initExpr2C (InitString s) = doubleQuotes $ text s |
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initExpr2C (InitReference (Identifier i)) = text i |
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initExpr2C _ = text "<<expression>>" |
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type2C :: TypeDecl -> Doc |
122 |
type2C UnknownType = text "void" |
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6399 | 123 |
type2C (String l) = text $ "string" ++ show l |
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type2C (SimpleType (Identifier i)) = text i |
125 |
type2C (PointerTo t) = type2C t <> text "*" |
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type2C (RecordType tvs union) = text "{" $+$ (nest 4 . vcat . map tvar2C $ tvs) $+$ text "}" |
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type2C (RangeType r) = text "<<range type>>" |
128 |
type2C (Sequence ids) = text "<<sequence type>>" |
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129 |
type2C (ArrayDecl r t) = text "<<array type>>" |
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130 |
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132 |
phrase2C :: Phrase -> Doc |
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6307 | 133 |
phrase2C (Phrases p) = text "{" $+$ (nest 4 . vcat . map phrase2C $ p) $+$ text "}" |
6273 | 134 |
phrase2C (ProcCall (Identifier name) params) = text name <> parens (hsep . punctuate (char ',') . map expr2C $ params) <> semi |
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phrase2C (IfThenElse (expr) phrase1 mphrase2) = text "if" <> parens (expr2C expr) $+$ (phrase2C . wrapPhrase) phrase1 $+$ elsePart |
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where |
137 |
elsePart | isNothing mphrase2 = empty |
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| otherwise = text "else" $$ (phrase2C . wrapPhrase) (fromJust mphrase2) |
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phrase2C (Assignment ref expr) = ref2C ref <> text " = " <> expr2C expr <> semi |
6307 | 140 |
phrase2C (WhileCycle expr phrase) = text "while" <> parens (expr2C expr) $$ (phrase2C $ wrapPhrase phrase) |
141 |
phrase2C (SwitchCase expr cases mphrase) = text "switch" <> parens (expr2C expr) <> text "of" $+$ (nest 4 . vcat . map case2C) cases |
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where |
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case2C :: ([Expression], Phrase) -> Doc |
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case2C (e, p) = text "case" <+> parens (hsep . punctuate (char ',') . map expr2C $ e) <> char ':' <> nest 4 (phrase2C p $+$ text "break;") |
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phrase2C (WithBlock ref p) = text "namespace" <> parens (ref2C ref) $$ (phrase2C $ wrapPhrase p) |
146 |
phrase2C (ForCycle (Identifier i) e1 e2 p) = |
|
147 |
text "for" <> (parens . hsep . punctuate (char ';') $ [text i <+> text "=" <+> expr2C e1, text i <+> text "<=" <+> expr2C e2, text "++" <> text i]) |
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148 |
$$ |
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149 |
phrase2C (wrapPhrase p) |
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150 |
phrase2C (RepeatCycle e p) = text "do" <+> phrase2C (Phrases p) <+> text "while" <> parens (text "!" <> parens (expr2C e)) |
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151 |
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wrapPhrase p@(Phrases _) = p |
154 |
wrapPhrase p = Phrases [p] |
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6273 | 155 |
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6355 | 156 |
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6273 | 157 |
expr2C :: Expression -> Doc |
158 |
expr2C (Expression s) = text s |
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6307 | 159 |
expr2C (BinOp op expr1 expr2) = parens $ (expr2C expr1) <+> op2C op <+> (expr2C expr2) |
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expr2C (NumberLiteral s) = text s |
161 |
expr2C (HexNumber s) = text "0x" <> (text . map toLower $ s) |
|
162 |
expr2C (StringLiteral s) = doubleQuotes $ text s |
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163 |
expr2C (Reference ref) = ref2C ref |
|
6307 | 164 |
expr2C (PrefixOp op expr) = op2C op <+> expr2C expr |
165 |
{- |
|
6277 | 166 |
| PostfixOp String Expression |
167 |
| CharCode String |
|
6273 | 168 |
-} |
169 |
expr2C _ = empty |
|
170 |
||
6307 | 171 |
|
172 |
ref2C :: Reference -> Doc |
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6317
83b93a2d2741
Improve parsing of complex references like "a^[b[c], d]"
unc0rr
parents:
6307
diff
changeset
|
173 |
ref2C (ArrayElement exprs ref) = ref2C ref <> (brackets . hcat) (punctuate comma $ map expr2C exprs) |
6307 | 174 |
ref2C (SimpleReference (Identifier name)) = text name |
175 |
ref2C (RecordField (Dereference ref1) ref2) = ref2C ref1 <> text "->" <> ref2C ref2 |
|
176 |
ref2C (RecordField ref1 ref2) = ref2C ref1 <> text "." <> ref2C ref2 |
|
177 |
ref2C (Dereference ref) = parens $ text "*" <> ref2C ref |
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6317
83b93a2d2741
Improve parsing of complex references like "a^[b[c], d]"
unc0rr
parents:
6307
diff
changeset
|
178 |
ref2C (FunCall params ref) = ref2C ref <> parens (hsep . punctuate (char ',') . map expr2C $ params) |
83b93a2d2741
Improve parsing of complex references like "a^[b[c], d]"
unc0rr
parents:
6307
diff
changeset
|
179 |
ref2C (Address ref) = text "&" <> ref2C ref |
6307 | 180 |
|
6355 | 181 |
|
6275 | 182 |
op2C "or" = text "|" |
183 |
op2C "and" = text "&" |
|
6307 | 184 |
op2C "not" = text "!" |
185 |
op2C "xor" = text "^" |
|
6275 | 186 |
op2C "div" = text "/" |
187 |
op2C "mod" = text "%" |
|
6307 | 188 |
op2C "shl" = text "<<" |
189 |
op2C "shr" = text ">>" |
|
6275 | 190 |
op2C "<>" = text "!=" |
6277 | 191 |
op2C "=" = text "==" |
6275 | 192 |
op2C a = text a |
6273 | 193 |
|
194 |
maybeVoid "" = "void" |
|
195 |
maybeVoid a = a |