X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=JVM%2FConverter.hs;h=0c26dd156c0e91afcf6c638106fc651ea9a53933;hb=359cf0fa124cd3bc0ffedf8ecee77022970ba562;hp=82c88e950ffa72a14742fc7bd029ca6184a77d2d;hpb=635ecf8528ab8c5b84b88e9ab82b170f1271c6b6;p=hs-java.git diff --git a/JVM/Converter.hs b/JVM/Converter.hs index 82c88e9..0c26dd1 100644 --- a/JVM/Converter.hs +++ b/JVM/Converter.hs @@ -1,75 +1,199 @@ {-# LANGUAGE TypeFamilies, StandaloneDeriving, FlexibleInstances, FlexibleContexts, UndecidableInstances, RecordWildCards, OverloadedStrings #-} -module JVM.Converter where +-- | Functions to convert from low-level .class format representation and +-- high-level Java classes, methods etc representation +module JVM.Converter + (parseClass, parseClassFile, + classFile2Direct, classDirect2File, + encodeClass, + methodByName, + attrByName, + methodCode + ) + where -import Codec.Binary.UTF8.String hiding (encode, decode) +import Control.Monad.Exception import Data.List import Data.Word import Data.Bits import Data.Binary -import Data.Char -import Data.String +import Data.Default () -- import instances only import qualified Data.ByteString.Lazy as B -import Data.Array +import qualified Data.ByteString.Lazy.Char8 () import qualified Data.Set as S import qualified Data.Map as M -import Debug.Trace - import JVM.ClassFile -import JVM.Types +import JVM.Common +import JVM.Exceptions -instance IsString B.ByteString where - fromString s = B.pack $ map (fromIntegral . ord) $ encodeString s +-- | Parse .class file data +parseClass :: B.ByteString -> Class Direct +parseClass bstr = classFile2Direct $ decode bstr -decompile :: B.ByteString -> Class -decompile bstr = convertClass $ decode bstr +-- | Parse class data from file +parseClassFile :: FilePath -> IO (Class Direct) +parseClassFile path = classFile2Direct `fmap` decodeFile path -decompileFile :: FilePath -> IO Class -decompileFile path = convertClass `fmap` decodeFile path +encodeClass :: (Class Direct) -> B.ByteString +encodeClass cls = encode $ classDirect2File cls -convertClass :: ClassFile -> Class -convertClass (ClassFile {..}) = - let pool = constantPoolArray constsPool +classFile2Direct :: Class File -> Class Direct +classFile2Direct (Class {..}) = + let pool = poolFile2Direct constsPool superName = className $ pool ! superClass - in Class { - constantPool = pool, - classAccess = convertAccess accessFlags, - this = className $ pool ! thisClass, - super = if superClass == 0 then Nothing else Just superName, - implements = map (\i -> className $ pool ! i) interfaces, - fields = map (convertField pool) classFields, - methods = map (convertMethod pool) classMethods, - classAttrs = convertAttrs pool classAttributes } - -constantPoolArray :: [CpInfo] -> Pool -constantPoolArray list = pool + d = defaultClass :: Class Direct + in d { + constsPoolSize = fromIntegral (M.size pool), + constsPool = pool, + accessFlags = accessFile2Direct accessFlags, + thisClass = className $ pool ! thisClass, + superClass = if superClass == 0 then "" else superName, + interfacesCount = interfacesCount, + interfaces = map (\i -> className $ pool ! i) interfaces, + classFieldsCount = classFieldsCount, + classFields = map (fieldFile2Direct pool) classFields, + classMethodsCount = classMethodsCount, + classMethods = map (methodFile2Direct pool) classMethods, + classAttributesCount = classAttributesCount, + classAttributes = attributesFile2Direct pool classAttributes } + +classDirect2File :: Class Direct -> Class File +classDirect2File (Class {..}) = + let d = defaultClass :: Class File + in d { + constsPoolSize = fromIntegral (M.size poolInfo + 1), + constsPool = poolInfo, + accessFlags = accessDirect2File accessFlags, + thisClass = force "this" $ poolClassIndex poolInfo thisClass, + superClass = force "super" $ poolClassIndex poolInfo superClass, + interfacesCount = fromIntegral (length interfaces), + interfaces = map (force "ifaces" . poolIndex poolInfo) interfaces, + classFieldsCount = fromIntegral (length classFields), + classFields = map (fieldDirect2File poolInfo) classFields, + classMethodsCount = fromIntegral (length classMethods), + classMethods = map (methodDirect2File poolInfo) classMethods, + classAttributesCount = fromIntegral $ arsize classAttributes, + classAttributes = to (arlist classAttributes) } + where + poolInfo = poolDirect2File constsPool + to :: [(B.ByteString, B.ByteString)] -> Attributes File + to pairs = AP (map (attrInfo poolInfo) pairs) + +poolDirect2File :: Pool Direct -> Pool File +poolDirect2File pool = result + where + result = M.map cpInfo pool + + cpInfo :: Constant Direct -> Constant File + cpInfo (CClass name) = CClass (force "class" $ poolIndex result name) + cpInfo (CField cls name) = + CField (force "field a" $ poolClassIndex result cls) (force "field b" $ poolNTIndex result name) + cpInfo (CMethod cls name) = + CMethod (force "method a" $ poolClassIndex result cls) (force ("method b: " ++ show name) $ poolNTIndex result name) + cpInfo (CIfaceMethod cls name) = + CIfaceMethod (force "iface method a" $ poolIndex result cls) (force "iface method b" $ poolNTIndex result name) + cpInfo (CString s) = CString (force "string" $ poolIndex result s) + cpInfo (CInteger x) = CInteger x + cpInfo (CFloat x) = CFloat x + cpInfo (CLong x) = CLong (fromIntegral x) + cpInfo (CDouble x) = CDouble x + cpInfo (CNameType n t) = + CNameType (force "name" $ poolIndex result n) (force "type" $ poolIndex result t) + cpInfo (CUTF8 s) = CUTF8 s + cpInfo (CUnicode s) = CUnicode s + +-- | Find index of given string in the list of constants +poolIndex :: (Throws NoItemInPool e) => Pool File -> B.ByteString -> EM e Word16 +poolIndex list name = case findIndex test (M.elems list) of + Nothing -> throw (NoItemInPool name) + Just i -> return $ fromIntegral $ i+1 + where + test (CUTF8 s) | s == name = True + test (CUnicode s) | s == name = True + test _ = False + +-- | Find index of given string in the list of constants +poolClassIndex :: (Throws NoItemInPool e) => Pool File -> B.ByteString -> EM e Word16 +poolClassIndex list name = case findIndex checkString (M.elems list) of + Nothing -> throw (NoItemInPool name) + Just i -> case findIndex (checkClass $ fromIntegral $ i+1) (M.elems list) of + Nothing -> throw (NoItemInPool $ i+1) + Just j -> return $ fromIntegral $ j+1 + where + checkString (CUTF8 s) | s == name = True + checkString (CUnicode s) | s == name = True + checkString _ = False + + checkClass i (CClass x) | i == x = True + checkClass _ _ = False + +poolNTIndex list x@(NameType n t) = do + ni <- poolIndex list n + ti <- poolIndex list (byteString t) + case findIndex (check ni ti) (M.elems list) of + Nothing -> throw (NoItemInPool x) + Just i -> return $ fromIntegral (i+1) where - pool :: Pool - pool = listArray (1,n) $ map convert list - n = fromIntegral $ length list + check ni ti (CNameType n' t') + | (ni == n') && (ti == t') = True + check _ _ _ = False - convertNameType :: (HasSignature a, Binary (Signature a)) => Word16 -> NameType a +fieldDirect2File :: Pool File -> Field Direct -> Field File +fieldDirect2File pool (Field {..}) = Field { + fieldAccessFlags = accessDirect2File fieldAccessFlags, + fieldName = force "field name" $ poolIndex pool fieldName, + fieldSignature = force "signature" $ poolIndex pool (encode fieldSignature), + fieldAttributesCount = fromIntegral (arsize fieldAttributes), + fieldAttributes = to (arlist fieldAttributes) } + where + to :: [(B.ByteString, B.ByteString)] -> Attributes File + to pairs = AP (map (attrInfo pool) pairs) + +methodDirect2File :: Pool File -> Method Direct -> Method File +methodDirect2File pool (Method {..}) = Method { + methodAccessFlags = accessDirect2File methodAccessFlags, + methodName = force "method name" $ poolIndex pool methodName, + methodSignature = force "method sig" $ poolIndex pool (encode methodSignature), + methodAttributesCount = fromIntegral (arsize methodAttributes), + methodAttributes = to (arlist methodAttributes) } + where + to :: [(B.ByteString, B.ByteString)] -> Attributes File + to pairs = AP (map (attrInfo pool) pairs) + +attrInfo :: Pool File -> (B.ByteString, B.ByteString) -> Attribute +attrInfo pool (name, value) = Attribute { + attributeName = force "attr name" $ poolIndex pool name, + attributeLength = fromIntegral (B.length value), + attributeValue = value } + +poolFile2Direct :: Pool File -> Pool Direct +poolFile2Direct ps = pool + where + pool :: Pool Direct + pool = M.map convert ps + + n = fromIntegral $ M.size ps + + convertNameType :: (HasSignature a) => Word16 -> NameType a convertNameType i = let (CNameType n s) = pool ! i in NameType n (decode s) - convert (CONSTANT_Class i) = CClass $ getString $ pool ! i - convert (CONSTANT_Fieldref i j) = CField (className $ pool ! i) (convertNameType j) - convert (CONSTANT_Methodref i j) = CMethod (className $ pool ! i) (convertNameType j) - convert (CONSTANT_InterfaceMethodref i j) = CIfaceMethod (className $ pool ! i) (convertNameType j) - convert (CONSTANT_String i) = CString $ getString $ pool ! i - convert (CONSTANT_Integer x) = CInteger x - convert (CONSTANT_Float x) = CFloat x - convert (CONSTANT_Long x) = CLong (fromIntegral x) - convert (CONSTANT_Double x) = CDouble x - convert (CONSTANT_NameAndType i j) = CNameType (getString $ pool ! i) (getString $ pool ! j) - convert (CONSTANT_Utf8 _ bs) = CUTF8 bs - convert (CONSTANT_Unicode _ bs) = CUnicode bs - -className' x = trace ("Class name: " ++ show x) B.empty - -convertAccess :: Word16 -> Access -convertAccess w = S.fromList $ concat $ zipWith (\i f -> if testBit w i then [f] else []) [0..] $ [ + convert (CClass i) = CClass $ getString $ pool ! i + convert (CField i j) = CField (className $ pool ! i) (convertNameType j) + convert (CMethod i j) = CMethod (className $ pool ! i) (convertNameType j) + convert (CIfaceMethod i j) = CIfaceMethod (className $ pool ! i) (convertNameType j) + convert (CString i) = CString $ getString $ pool ! i + convert (CInteger x) = CInteger x + convert (CFloat x) = CFloat x + convert (CLong x) = CLong (fromIntegral x) + convert (CDouble x) = CDouble x + convert (CNameType i j) = CNameType (getString $ pool ! i) (getString $ pool ! j) + convert (CUTF8 bs) = CUTF8 bs + convert (CUnicode bs) = CUnicode bs + +accessFile2Direct :: AccessFlags File -> AccessFlags Direct +accessFile2Direct w = S.fromList $ concat $ zipWith (\i f -> if testBit w i then [f] else []) [0..] $ [ ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED, @@ -82,34 +206,50 @@ convertAccess w = S.fromList $ concat $ zipWith (\i f -> if testBit w i then [f] ACC_INTERFACE, ACC_ABSTRACT ] -convertField :: Pool -> FieldInfo -> Field -convertField pool (FieldInfo {..}) = Field { - fieldAccess = convertAccess fieldAccessFlags, - fieldName = getString $ pool ! fieldNameIndex, - fieldSignature = decode $ getString $ pool ! fieldSignatureIndex, - fieldAttrs = convertAttrs pool fieldAttributes } - -convertMethod :: Pool -> MethodInfo -> Method -convertMethod pool (MethodInfo {..}) = Method { - methodAccess = convertAccess methodAccessFlags, - methodName = getString $ pool ! methodNameIndex, - methodSignature = decode $ getString $ pool ! methodSignatureIndex, - methodAttrs = convertAttrs pool methodAttributes } - -convertAttrs :: Pool -> [AttributeInfo] -> Attributes -convertAttrs pool attrs = M.fromList $ map go attrs +accessDirect2File :: AccessFlags Direct -> AccessFlags File +accessDirect2File fs = bitsOr $ map toBit $ S.toList fs + where + bitsOr = foldl (.|.) 0 + toBit f = 1 `shiftL` (fromIntegral $ fromEnum f) + +fieldFile2Direct :: Pool Direct -> Field File -> Field Direct +fieldFile2Direct pool (Field {..}) = Field { + fieldAccessFlags = accessFile2Direct fieldAccessFlags, + fieldName = getString $ pool ! fieldName, + fieldSignature = decode $ getString $ pool ! fieldSignature, + fieldAttributesCount = fromIntegral (apsize fieldAttributes), + fieldAttributes = attributesFile2Direct pool fieldAttributes } + +methodFile2Direct :: Pool Direct -> Method File -> Method Direct +methodFile2Direct pool (Method {..}) = Method { + methodAccessFlags = accessFile2Direct methodAccessFlags, + methodName = getString $ pool ! methodName, + methodSignature = decode $ getString $ pool ! methodSignature, + methodAttributesCount = fromIntegral (apsize methodAttributes), + methodAttributes = attributesFile2Direct pool methodAttributes } + +attributesFile2Direct :: Pool Direct -> Attributes File -> Attributes Direct +attributesFile2Direct pool (AP attrs) = AR (M.fromList $ map go attrs) where - go (AttributeInfo {..}) = (getString $ pool ! attributeName, - attributeValue) + go :: Attribute -> (B.ByteString, B.ByteString) + go (Attribute {..}) = (getString $ pool ! attributeName, + attributeValue) -methodByName :: Class -> B.ByteString -> Maybe Method +-- | Try to get class method by name +methodByName :: Class Direct -> B.ByteString -> Maybe (Method Direct) methodByName cls name = - find (\m -> methodName m == name) (methods cls) + find (\m -> methodName m == name) (classMethods cls) -attrByName :: (HasAttributes a) => a -> B.ByteString -> Maybe B.ByteString -attrByName x name = M.lookup name (attributes x) +-- | Try to get object attribute by name +attrByName :: (HasAttributes a) => a Direct -> B.ByteString -> Maybe B.ByteString +attrByName x name = + let (AR m) = attributes x + in M.lookup name m -methodCode :: Class -> B.ByteString -> Maybe B.ByteString +-- | Try to get Code for class method (no Code for interface methods) +methodCode :: Class Direct + -> B.ByteString -- ^ Method name + -> Maybe B.ByteString methodCode cls name = do method <- methodByName cls name attrByName method "Code"