| author | unc0rr |
| Sun, 13 Nov 2011 13:46:26 +0300 | |
| changeset 6355 | 734fed7aefd3 |
| parent 6317 | 83b93a2d2741 |
| child 6391 | bd5851ab3157 |
| permissions | -rw-r--r-- |
| 6273 | 1 |
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.String |
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pas2C :: String -> IO String |
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pas2C fileName = do |
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ptree <- parseFromFile pascalUnit fileName |
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case ptree of |
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(Left a) -> return (show a) |
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(Right a) -> (return . render . pascal2C) a |
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pascal2C :: PascalUnit -> Doc |
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pascal2C (Unit unitName interface implementation init fin) = implementation2C implementation |
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implementation2C :: Implementation -> Doc |
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implementation2C (Implementation uses tvars) = typesAndVars2C tvars |
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typesAndVars2C :: TypesAndVars -> Doc |
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typesAndVars2C (TypesAndVars ts) = vcat $ map tvar2C ts |
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tvar2C :: TypeVarDeclaration -> Doc |
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tvar2C (FunctionDeclaration (Identifier name) returnType Nothing) = |
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type2C returnType <+> text (name ++ "();") |
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tvar2C (FunctionDeclaration (Identifier name) returnType (Just phrase)) = |
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type2C returnType <+> text (name ++ "()") |
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$$ |
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phrase2C phrase |
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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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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 _ = text "<<expression>>" |
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type2C :: TypeDecl -> Doc |
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type2C UnknownType = text "void" |
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type2C String = text "string" |
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type2C (SimpleType (Identifier i)) = text i |
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type2C (PointerTo t) = type2C t <> text "*" |
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type2C (RecordType tvs) = text "{" $+$ (nest 4 . vcat . map tvar2C $ tvs) $+$ text "}"
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type2C (RangeType r) = text "<<range type>>" |
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type2C (Sequence ids) = text "<<sequence type>>" |
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type2C (ArrayDecl r t) = text "<<array type>>" |
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phrase2C :: Phrase -> Doc |
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phrase2C (Phrases p) = text "{" $+$ (nest 4 . vcat . map phrase2C $ p) $+$ text "}"
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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 |
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elsePart | isNothing mphrase2 = empty |
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| otherwise = text "else" $$ (phrase2C . wrapPhrase) (fromJust mphrase2) |
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phrase2C (Assignment ref expr) = ref2C ref <> text " = " <> expr2C expr <> semi |
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phrase2C (WhileCycle expr phrase) = text "while" <> parens (expr2C expr) $$ (phrase2C $ wrapPhrase phrase) |
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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 (expr2C e) <> char ':' <> nest 4 (phrase2C p $+$ text "break;") |
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phrase2C (WithBlock ref p) = text "namespace" <> parens (ref2C ref) $$ (phrase2C $ wrapPhrase p) |
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phrase2C (ForCycle (Identifier i) e1 e2 p) = |
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text "for" <> (parens . hsep . punctuate (char ';') $ [text i <+> text "=" <+> expr2C e1, text i <+> text "<=" <+> expr2C e2, text "++" <> text i]) |
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$$ |
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phrase2C (wrapPhrase p) |
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phrase2C (RepeatCycle e p) = text "do" <+> phrase2C (Phrases p) <+> text "while" <> parens (text "!" <> parens (expr2C e)) |
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wrapPhrase p@(Phrases _) = p |
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wrapPhrase p = Phrases [p] |
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expr2C :: Expression -> Doc |
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expr2C (Expression s) = text s |
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expr2C (BinOp op expr1 expr2) = parens $ (expr2C expr1) <+> op2C op <+> (expr2C expr2) |
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expr2C (NumberLiteral s) = text s |
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expr2C (HexNumber s) = text "0x" <> (text . map toLower $ s) |
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expr2C (StringLiteral s) = doubleQuotes $ text s |
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expr2C (Reference ref) = ref2C ref |
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expr2C (PrefixOp op expr) = op2C op <+> expr2C expr |
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{-
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| PostfixOp String Expression |
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| CharCode String |
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-} |
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expr2C _ = empty |
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ref2C :: Reference -> Doc |
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6317
83b93a2d2741
Improve parsing of complex references like "a^[b[c], d]"
unc0rr
parents:
6307
diff
changeset
|
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ref2C (ArrayElement exprs ref) = ref2C ref <> (brackets . hcat) (punctuate comma $ map expr2C exprs) |
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ref2C (SimpleReference (Identifier name)) = text name |
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ref2C (RecordField (Dereference ref1) ref2) = ref2C ref1 <> text "->" <> ref2C ref2 |
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ref2C (RecordField ref1 ref2) = ref2C ref1 <> text "." <> ref2C ref2 |
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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
|
111 |
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
|
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ref2C (Address ref) = text "&" <> ref2C ref |
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op2C "or" = text "|" |
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op2C "and" = text "&" |
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op2C "not" = text "!" |
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op2C "xor" = text "^" |
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op2C "div" = text "/" |
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op2C "mod" = text "%" |
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op2C "shl" = text "<<" |
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op2C "shr" = text ">>" |
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op2C "<>" = text "!=" |
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op2C "=" = text "==" |
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op2C a = text a |
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maybeVoid "" = "void" |
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maybeVoid a = a |