Ejemplo n.º 1
0
        private With decodeWith(ActionFactory factory)
        {
            With a      = new With();
            int  size   = reader.readUI16();
            int  target = size + reader.Offset;

            a.endWith = factory.getLabel(target);
            return(a);
        }
Ejemplo n.º 2
0
        private Branch decodeBranch(int code, ActionFactory factory)
        {
            Branch a      = new Branch(code);
            int    offset = reader.readSI16();
            int    target = offset + reader.Offset;

            a.target = factory.getLabel(target);
            return(a);
        }
Ejemplo n.º 3
0
        /// <summary> consume actions until length bytes are used up</summary>
        /// <param name="length">
        /// </param>
        /// <param name="throwExceptions">- if false exceptions will NOT be thrown. This is
        /// used for decoding a series of opcodes which may not be complete on their own.
        /// </param>
        /// <throws>  IOException </throws>
        public virtual ActionList decode(int length, bool throwExceptions)
        {
            int  startOffset = reader.Offset;
            int  end         = startOffset + length;
            bool ending      = false;

            ActionFactory factory = new ActionFactory(length, startOffset, actionCount);

            try
            {
                for (int offset = startOffset; offset < end; offset = reader.Offset)
                {
                    int opcode = reader.readUI8();

                    if (opcode > 0)
                    {
                        if (ending)
                        {
                            throw new SwfFormatException("unexpected bytes after sactionEnd: " + opcode);
                        }
                        factory.setActionOffset(actionCount, offset);
                        decodeAction(opcode, offset, factory);
                        actionCount++;
                    }
                    else if (opcode == 0)
                    {
                        ending = true;
                    }
                    else
                    {
                        break;
                    }
                }
                // keep track of the end too
                factory.setActionOffset(actionCount, reader.Offset);
            }
            catch (System.IndexOutOfRangeException aio)
            {
                if (throwExceptions)
                {
                    throw aio;
                }
            }
            catch (SwfFormatException swf)
            {
                if (throwExceptions)
                {
                    throw swf;
                }
            }

            return(factory.createActionList(keepOffsets));
        }
Ejemplo n.º 4
0
        private WaitForFrame decodeWaitForFrame(int opcode, ActionFactory factory)
        {
            WaitForFrame a = new WaitForFrame(opcode);

            if (opcode == Flash.Swf.ActionConstants.sactionWaitForFrame)
            {
                a.frame = reader.readUI16();
            }
            int skipCount  = reader.readUI8();
            int skipTarget = actionCount + 1 + skipCount;

            factory.addSkipEntry(a, skipTarget);
            return(a);
        }
Ejemplo n.º 5
0
		/// <summary> consume actions until length bytes are used up</summary>
		/// <param name="length">
		/// </param>
		/// <param name="throwExceptions">- if false exceptions will NOT be thrown. This is 
		/// used for decoding a series of opcodes which may not be complete on their own.
		/// </param>
		/// <throws>  IOException </throws>
		public virtual ActionList decode(int length, bool throwExceptions)
		{
			int startOffset = reader.Offset;
			int end = startOffset + length;
			bool ending = false;
			
			ActionFactory factory = new ActionFactory(length, startOffset, actionCount);
			try
			{
				for (int offset = startOffset; offset < end; offset = reader.Offset)
				{
					int opcode = reader.readUI8();
					
					if (opcode > 0)
					{
						if (ending)
							throw new SwfFormatException("unexpected bytes after sactionEnd: " + opcode);
						factory.setActionOffset(actionCount, offset);
						decodeAction(opcode, offset, factory);
						actionCount++;
					}
					else if (opcode == 0)
					{
						ending = true;
					}
					else
					{
						break;
					}
				}
				// keep track of the end too
				factory.setActionOffset(actionCount, reader.Offset);
			}
			catch (System.IndexOutOfRangeException aio)
			{
				if (throwExceptions)
					throw aio;
			}
			catch (SwfFormatException swf)
			{
				if (throwExceptions)
					throw swf;
			}
			
			return factory.createActionList(keepOffsets);
		}
Ejemplo n.º 6
0
        private Try decodeTry(ActionFactory factory)
        {
            Try a = new Try();

            a.flags = reader.readUI8();
            int trySize     = reader.readUI16();
            int catchSize   = reader.readUI16();
            int finallySize = reader.readUI16();

            if (a.hasRegister())
            {
                a.catchReg = reader.readUI8();
            }
            else
            {
                a.catchName = reader.readString();
            }

            // we have now consumed the try action.  what follows is label mgmt

            int tryEnd = reader.Offset + trySize;

            a.endTry = factory.getLabel(tryEnd);

            // place the catchLabel to mark the end point of the catch handler
            if (a.hasCatch())
            {
                a.endCatch = factory.getLabel(tryEnd + catchSize);
            }

            // place the finallyLabel to mark the end point of the finally handler
            if (a.hasFinally())
            {
                a.endFinally = factory.getLabel(tryEnd + finallySize + (a.hasCatch()?catchSize:0));
            }

            return(a);
        }
Ejemplo n.º 7
0
		private With decodeWith(ActionFactory factory)
		{
			With a = new With();
			int size = reader.readUI16();
			int target = size + reader.Offset;
			a.endWith = factory.getLabel(target);
			return a;
		}
Ejemplo n.º 8
0
		private Push decodePush(int offset, int end, ActionFactory factory)
		{
			Push p;
			do 
			{
				int pushType = reader.readUI8();
				switch (pushType)
				{
					case Flash.Swf.ActionConstants.kPushStringType:  // string
						p = ActionFactory.createPush(reader.readString());
						break;
					
					case Flash.Swf.ActionConstants.kPushFloatType:  // float
                        byte[] floatBytes = new byte[4];
                        reader.read(floatBytes, 0, 4);
						p = ActionFactory.createPush(BitConverter.ToSingle(floatBytes, 0)); // value
						break;
					
					case Flash.Swf.ActionConstants.kPushNullType:  // null
						p = ActionFactory.createPushNull();
						break;
					
					case Flash.Swf.ActionConstants.kPushUndefinedType:  // undefined
						p = ActionFactory.createPushUndefined();
						break;
					
					case Flash.Swf.ActionConstants.kPushRegisterType:  // register
						p = ActionFactory.createPushRegister(reader.readUI8());
						break;
					
					case Flash.Swf.ActionConstants.kPushBooleanType:  // boolean
						p = ActionFactory.createPush(reader.readUI8() != 0);
						break;
					
					case Flash.Swf.ActionConstants.kPushDoubleType:  // double
						// read two 32 bit little-endian values in big-endian order.  weird.
                        byte[] doubleBytes = new byte[8];
                        reader.read(doubleBytes, 4, 4);
                        reader.read(doubleBytes, 0, 4);
                        p = ActionFactory.createPush(BitConverter.ToDouble(doubleBytes, 0));
						break;
					
					case Flash.Swf.ActionConstants.kPushIntegerType:  // integer
						p = ActionFactory.createPush((int) reader.readUI32());
						break;
					
					case Flash.Swf.ActionConstants.kPushConstant8Type:  // 8-bit cpool reference
						p = ActionFactory.createPushCpool(reader.readUI8());
						break;
					
					case Flash.Swf.ActionConstants.kPushConstant16Type:  // 16-bit cpool reference
						p = ActionFactory.createPushCpool(reader.readUI16());
						break;
					
					default: 
						throw new SwfFormatException("Unknown push data type " + pushType);
					
				}
				factory.setAction(offset, p);
				offset = reader.Offset;
			}
			while (offset < end);
			return p;
		}
Ejemplo n.º 9
0
		private WaitForFrame decodeWaitForFrame(int opcode, ActionFactory factory)
		{
			WaitForFrame a = new WaitForFrame(opcode);
			if (opcode == Flash.Swf.ActionConstants.sactionWaitForFrame)
				a.frame = reader.readUI16();
			int skipCount = reader.readUI8();
			int skipTarget = actionCount + 1 + skipCount;
			factory.addSkipEntry(a, skipTarget);
			return a;
		}
Ejemplo n.º 10
0
		private Branch decodeBranch(int code, ActionFactory factory)
		{
			Branch a = new Branch(code);
			int offset = reader.readSI16();
			int target = offset + reader.Offset;
			a.target = factory.getLabel(target);
			return a;
		}
Ejemplo n.º 11
0
		private Try decodeTry(ActionFactory factory)
		{
			Try a = new Try();
			
			a.flags = reader.readUI8();
			int trySize = reader.readUI16();
			int catchSize = reader.readUI16();
			int finallySize = reader.readUI16();
			
			if (a.hasRegister())
				a.catchReg = reader.readUI8();
			else
				a.catchName = reader.readString();
			
			// we have now consumed the try action.  what follows is label mgmt
			
			int tryEnd = reader.Offset + trySize;
			a.endTry = factory.getLabel(tryEnd);
			
			// place the catchLabel to mark the end point of the catch handler
			if (a.hasCatch())
				a.endCatch = factory.getLabel(tryEnd + catchSize);
			
			// place the finallyLabel to mark the end point of the finally handler
			if (a.hasFinally())
				a.endFinally = factory.getLabel(tryEnd + finallySize + (a.hasCatch()?catchSize:0));
			
			return a;
		}
Ejemplo n.º 12
0
		private void  decodeAction(int opcode, int offset, ActionFactory factory)
		{
			LineRecord line = debug != null?debug.getLine(offset):null;
			if (line != null)
			{
				factory.setLine(offset, line);
			}
			
			// interleave register records in the action list
			RegisterRecord record = (debug != null)?debug.getRegisters(offset):null;
			if (record != null)
			{
				factory.setRegister(offset, record);
			}
			
			Action a;
			if (opcode < 0x80)
			{
				a = ActionFactory.createAction(opcode);
				factory.setAction(offset, a);
				return ;
			}
			
			int len = reader.readUI16();
			int pos = offset + 3;
			
			switch (opcode)
			{
				
				case Flash.Swf.ActionConstants.sactionDefineFunction: 
					a = decodeDefineFunction(pos, len);
					factory.setAction(offset, a);
					return ;
				
				
				case Flash.Swf.ActionConstants.sactionDefineFunction2: 
					a = decodeDefineFunction2(pos, len);
					factory.setAction(offset, a);
					return ;
				
				
				case Flash.Swf.ActionConstants.sactionWith: 
					a = decodeWith(factory);
					break;
				
				
				case Flash.Swf.ActionConstants.sactionTry: 
					a = decodeTry(factory);
					break;
				
				
				case Flash.Swf.ActionConstants.sactionPush: 
					Push p = decodePush(offset, pos + len, factory);
					checkConsumed(pos, len, p);
					return ;
				
				
				case Flash.Swf.ActionConstants.sactionStrictMode: 
					a = decodeStrictMode();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionCall: 
					// this actions opcode has the high bit set, but there is no length.  considered a permanent bug.
					a = ActionFactory.createCall();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionGotoFrame: 
					a = decodeGotoFrame();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionGetURL: 
					a = decodeGetURL();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionStoreRegister: 
					a = decodeStoreRegister();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionConstantPool: 
					a = decodeConstantPool();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionWaitForFrame: 
					a = decodeWaitForFrame(opcode, factory);
					break;
				
				
				case Flash.Swf.ActionConstants.sactionSetTarget: 
					a = decodeSetTarget();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionGotoLabel: 
					a = decodeGotoLabel();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionWaitForFrame2: 
					a = decodeWaitForFrame(opcode, factory);
					break;
				
				
				case Flash.Swf.ActionConstants.sactionGetURL2: 
					a = decodeGetURL2();
					break;
				
				
				case Flash.Swf.ActionConstants.sactionJump: 
				case Flash.Swf.ActionConstants.sactionIf: 
					a = decodeBranch(opcode, factory);
					break;
				
				
				case Flash.Swf.ActionConstants.sactionGotoFrame2: 
					a = decodeGotoFrame2();
					break;
				
				
				default: 
					a = decodeUnknown(opcode, len);
					break;
				
			}
			checkConsumed(pos, len, a);
			factory.setAction(offset, a);
		}
Ejemplo n.º 13
0
        private Push decodePush(int offset, int end, ActionFactory factory)
        {
            Push p;

            do
            {
                int pushType = reader.readUI8();
                switch (pushType)
                {
                case Flash.Swf.ActionConstants.kPushStringType:                          // string
                    p = ActionFactory.createPush(reader.readString());
                    break;

                case Flash.Swf.ActionConstants.kPushFloatType:                          // float
                    byte[] floatBytes = new byte[4];
                    reader.read(floatBytes, 0, 4);
                    p = ActionFactory.createPush(BitConverter.ToSingle(floatBytes, 0));                             // value
                    break;

                case Flash.Swf.ActionConstants.kPushNullType:                          // null
                    p = ActionFactory.createPushNull();
                    break;

                case Flash.Swf.ActionConstants.kPushUndefinedType:                          // undefined
                    p = ActionFactory.createPushUndefined();
                    break;

                case Flash.Swf.ActionConstants.kPushRegisterType:                          // register
                    p = ActionFactory.createPushRegister(reader.readUI8());
                    break;

                case Flash.Swf.ActionConstants.kPushBooleanType:                          // boolean
                    p = ActionFactory.createPush(reader.readUI8() != 0);
                    break;

                case Flash.Swf.ActionConstants.kPushDoubleType:                          // double
                    // read two 32 bit little-endian values in big-endian order.  weird.
                    byte[] doubleBytes = new byte[8];
                    reader.read(doubleBytes, 4, 4);
                    reader.read(doubleBytes, 0, 4);
                    p = ActionFactory.createPush(BitConverter.ToDouble(doubleBytes, 0));
                    break;

                case Flash.Swf.ActionConstants.kPushIntegerType:                          // integer
                    p = ActionFactory.createPush((int)reader.readUI32());
                    break;

                case Flash.Swf.ActionConstants.kPushConstant8Type:                          // 8-bit cpool reference
                    p = ActionFactory.createPushCpool(reader.readUI8());
                    break;

                case Flash.Swf.ActionConstants.kPushConstant16Type:                          // 16-bit cpool reference
                    p = ActionFactory.createPushCpool(reader.readUI16());
                    break;

                default:
                    throw new SwfFormatException("Unknown push data type " + pushType);
                }
                factory.setAction(offset, p);
                offset = reader.Offset;
            }while (offset < end);
            return(p);
        }
Ejemplo n.º 14
0
        private StrictMode decodeStrictMode()
        {
            bool mode = reader.readUI8() != 0;

            return(ActionFactory.createStrictMode(mode));
        }
Ejemplo n.º 15
0
        private StoreRegister decodeStoreRegister()
        {
            int register = reader.readUI8();

            return(ActionFactory.createStoreRegister(register));
        }
Ejemplo n.º 16
0
        private void  decodeAction(int opcode, int offset, ActionFactory factory)
        {
            LineRecord line = debug != null?debug.getLine(offset) : null;

            if (line != null)
            {
                factory.setLine(offset, line);
            }

            // interleave register records in the action list
            RegisterRecord record = (debug != null)?debug.getRegisters(offset):null;

            if (record != null)
            {
                factory.setRegister(offset, record);
            }

            Action a;

            if (opcode < 0x80)
            {
                a = ActionFactory.createAction(opcode);
                factory.setAction(offset, a);
                return;
            }

            int len = reader.readUI16();
            int pos = offset + 3;

            switch (opcode)
            {
            case Flash.Swf.ActionConstants.sactionDefineFunction:
                a = decodeDefineFunction(pos, len);
                factory.setAction(offset, a);
                return;


            case Flash.Swf.ActionConstants.sactionDefineFunction2:
                a = decodeDefineFunction2(pos, len);
                factory.setAction(offset, a);
                return;


            case Flash.Swf.ActionConstants.sactionWith:
                a = decodeWith(factory);
                break;


            case Flash.Swf.ActionConstants.sactionTry:
                a = decodeTry(factory);
                break;


            case Flash.Swf.ActionConstants.sactionPush:
                Push p = decodePush(offset, pos + len, factory);
                checkConsumed(pos, len, p);
                return;


            case Flash.Swf.ActionConstants.sactionStrictMode:
                a = decodeStrictMode();
                break;


            case Flash.Swf.ActionConstants.sactionCall:
                // this actions opcode has the high bit set, but there is no length.  considered a permanent bug.
                a = ActionFactory.createCall();
                break;


            case Flash.Swf.ActionConstants.sactionGotoFrame:
                a = decodeGotoFrame();
                break;


            case Flash.Swf.ActionConstants.sactionGetURL:
                a = decodeGetURL();
                break;


            case Flash.Swf.ActionConstants.sactionStoreRegister:
                a = decodeStoreRegister();
                break;


            case Flash.Swf.ActionConstants.sactionConstantPool:
                a = decodeConstantPool();
                break;


            case Flash.Swf.ActionConstants.sactionWaitForFrame:
                a = decodeWaitForFrame(opcode, factory);
                break;


            case Flash.Swf.ActionConstants.sactionSetTarget:
                a = decodeSetTarget();
                break;


            case Flash.Swf.ActionConstants.sactionGotoLabel:
                a = decodeGotoLabel();
                break;


            case Flash.Swf.ActionConstants.sactionWaitForFrame2:
                a = decodeWaitForFrame(opcode, factory);
                break;


            case Flash.Swf.ActionConstants.sactionGetURL2:
                a = decodeGetURL2();
                break;


            case Flash.Swf.ActionConstants.sactionJump:
            case Flash.Swf.ActionConstants.sactionIf:
                a = decodeBranch(opcode, factory);
                break;


            case Flash.Swf.ActionConstants.sactionGotoFrame2:
                a = decodeGotoFrame2();
                break;


            default:
                a = decodeUnknown(opcode, len);
                break;
            }
            checkConsumed(pos, len, a);
            factory.setAction(offset, a);
        }