public static InstructionCollection Parse(Stream input, long instructionsPosition)
{
var instructions = new SortedList <int, InstructionBase>();
using (var helper = new InstructionParseHelper(input, instructionsPosition))
{
var reader = helper.GetReader();
while (helper.CanParse(instructions))
{
//now reader the instructions
var instructionPosition = helper.CurrentPosition;
var type = reader.ReadByteAsEnum <InstructionType>();
var requireAlignment = InstructionAlignment.IsAligned(type);
if (requireAlignment)
{
reader.Align(4);
}
InstructionBase instruction = null;
var parameters = new List <Value>();
switch (type)
{
case InstructionType.ToNumber:
instruction = new ToNumber();
break;
case InstructionType.NextFrame:
instruction = new NextFrame();
break;
case InstructionType.Play:
instruction = new Play();
break;
case InstructionType.Stop:
instruction = new Stop();
break;
case InstructionType.Add:
instruction = new Add();
break;
case InstructionType.Subtract:
instruction = new Subtract();
break;
case InstructionType.Multiply:
instruction = new Multiply();
break;
case InstructionType.Divide:
instruction = new Divide();
break;
case InstructionType.Not:
instruction = new Not();
break;
case InstructionType.StringEquals:
instruction = new StringEquals();
break;
case InstructionType.Pop:
instruction = new Pop();
break;
case InstructionType.ToInteger:
instruction = new ToInteger();
break;
case InstructionType.GetVariable:
instruction = new GetVariable();
break;
case InstructionType.SetVariable:
instruction = new SetVariable();
break;
case InstructionType.StringConcat:
instruction = new StringConcat();
break;
case InstructionType.GetProperty:
instruction = new GetProperty();
break;
case InstructionType.SetProperty:
instruction = new SetProperty();
break;
case InstructionType.Trace:
instruction = new Trace();
break;
case InstructionType.Random:
instruction = new RandomNumber();
break;
case InstructionType.Delete:
instruction = new Delete();
break;
case InstructionType.Delete2:
instruction = new Delete2();
break;
case InstructionType.DefineLocal:
instruction = new DefineLocal();
break;
case InstructionType.CallFunction:
instruction = new CallFunction();
break;
case InstructionType.Return:
instruction = new Return();
break;
case InstructionType.Modulo:
instruction = new Modulo();
break;
case InstructionType.NewObject:
instruction = new NewObject();
break;
case InstructionType.InitArray:
instruction = new InitArray();
break;
case InstructionType.InitObject:
instruction = new InitObject();
break;
case InstructionType.TypeOf:
instruction = new TypeOf();
break;
case InstructionType.Add2:
instruction = new Add2();
break;
case InstructionType.LessThan2:
instruction = new LessThan2();
break;
case InstructionType.Equals2:
instruction = new Equals2();
break;
case InstructionType.ToString:
instruction = new ToString();
break;
case InstructionType.PushDuplicate:
instruction = new PushDuplicate();
break;
case InstructionType.GetMember:
instruction = new GetMember();
break;
case InstructionType.SetMember:
instruction = new SetMember();
break;
case InstructionType.Increment:
instruction = new Increment();
break;
case InstructionType.Decrement:
instruction = new Decrement();
break;
case InstructionType.CallMethod:
instruction = new CallMethod();
break;
case InstructionType.Enumerate2:
instruction = new Enumerate2();
break;
case InstructionType.EA_PushThis:
instruction = new PushThis();
break;
case InstructionType.EA_PushZero:
instruction = new PushZero();
break;
case InstructionType.EA_PushOne:
instruction = new PushOne();
break;
case InstructionType.EA_CallFunc:
instruction = new CallFunc();
break;
case InstructionType.EA_CallMethodPop:
instruction = new CallMethodPop();
break;
case InstructionType.BitwiseXOr:
instruction = new BitwiseXOr();
break;
case InstructionType.Greater:
instruction = new Greater();
break;
case InstructionType.EA_PushThisVar:
instruction = new PushThisVar();
break;
case InstructionType.EA_PushGlobalVar:
instruction = new PushGlobalVar();
break;
case InstructionType.EA_ZeroVar:
instruction = new ZeroVar();
break;
case InstructionType.EA_PushTrue:
instruction = new PushTrue();
break;
case InstructionType.EA_PushFalse:
instruction = new PushFalse();
break;
case InstructionType.EA_PushNull:
instruction = new PushNull();
break;
case InstructionType.EA_PushUndefined:
instruction = new PushUndefined();
break;
case InstructionType.GotoFrame:
instruction = new GotoFrame();
parameters.Add(Value.FromInteger(reader.ReadInt32()));
break;
case InstructionType.GetURL:
instruction = new GetUrl();
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.SetRegister:
instruction = new SetRegister();
parameters.Add(Value.FromInteger(reader.ReadInt32()));
break;
case InstructionType.ConstantPool:
{
instruction = new ConstantPool();
var count = reader.ReadUInt32();
var constants = reader.ReadFixedSizeArrayAtOffset <uint>(() => reader.ReadUInt32(), count);
foreach (var constant in constants)
{
parameters.Add(Value.FromConstant(constant));
}
}
break;
case InstructionType.GotoLabel:
instruction = new GotoLabel();
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.DefineFunction2:
{
instruction = new DefineFunction2();
var name = reader.ReadStringAtOffset();
var nParams = reader.ReadUInt32();
var nRegisters = reader.ReadByte();
var flags = reader.ReadUInt24();
//list of parameter strings
var paramList = reader.ReadFixedSizeListAtOffset <FunctionArgument>(() => new FunctionArgument()
{
Register = reader.ReadInt32(),
Parameter = reader.ReadStringAtOffset(),
}, nParams);
parameters.Add(Value.FromString(name));
parameters.Add(Value.FromInteger((int)nParams));
parameters.Add(Value.FromInteger((int)nRegisters));
parameters.Add(Value.FromInteger((int)flags));
foreach (var param in paramList)
{
parameters.Add(Value.FromInteger(param.Register));
parameters.Add(Value.FromString(param.Parameter));
}
//body size of the function
parameters.Add(Value.FromInteger(reader.ReadInt32()));
//skip 8 bytes
reader.ReadUInt64();
}
break;
case InstructionType.PushData:
{
instruction = new PushData();
var count = reader.ReadUInt32();
var constants = reader.ReadFixedSizeArrayAtOffset <uint>(() => reader.ReadUInt32(), count);
foreach (var constant in constants)
{
parameters.Add(Value.FromConstant(constant));
}
}
break;
case InstructionType.BranchAlways:
{
instruction = new BranchAlways();
var offset = reader.ReadInt32();
parameters.Add(Value.FromInteger(offset));
helper.ReportBranchOffset(offset);
}
break;
case InstructionType.GetURL2:
instruction = new GetUrl2();
break;
case InstructionType.DefineFunction:
{
instruction = new DefineFunction();
var name = reader.ReadStringAtOffset();
//list of parameter strings
var paramList = reader.ReadListAtOffset <string>(() => reader.ReadStringAtOffset());
parameters.Add(Value.FromString(name));
parameters.Add(Value.FromInteger(paramList.Count));
foreach (var param in paramList)
{
parameters.Add(Value.FromString(param));
}
//body size of the function
parameters.Add(Value.FromInteger(reader.ReadInt32()));
//skip 8 bytes
reader.ReadUInt64();
}
break;
case InstructionType.BranchIfTrue:
{
instruction = new BranchIfTrue();
var offset = reader.ReadInt32();
parameters.Add(Value.FromInteger(offset));
helper.ReportBranchOffset(offset);
}
break;
case InstructionType.GotoFrame2:
instruction = new GotoFrame2();
parameters.Add(Value.FromInteger(reader.ReadInt32()));
break;
case InstructionType.EA_PushString:
instruction = new PushString();
//the constant id that should be pushed
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.EA_PushConstantByte:
instruction = new PushConstantByte();
//the constant id that should be pushed
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.EA_GetStringVar:
instruction = new GetStringVar();
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.EA_SetStringVar:
instruction = new SetStringVar();
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.EA_GetStringMember:
instruction = new GetStringMember();
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.EA_SetStringMember:
instruction = new SetStringMember();
parameters.Add(Value.FromString(reader.ReadStringAtOffset()));
break;
case InstructionType.EA_PushValueOfVar:
instruction = new PushValueOfVar();
//the constant id that should be pushed
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.EA_GetNamedMember:
instruction = new GetNamedMember();
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.EA_CallNamedFuncPop:
instruction = new CallNamedFuncPop();
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.EA_CallNamedFunc:
instruction = new CallNamedFunc();
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.EA_CallNamedMethodPop:
instruction = new CallNamedMethodPop();
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.EA_PushFloat:
instruction = new PushFloat();
parameters.Add(Value.FromFloat(reader.ReadSingle()));
break;
case InstructionType.EA_PushByte:
instruction = new PushByte();
parameters.Add(Value.FromInteger(reader.ReadByte()));
break;
case InstructionType.EA_PushShort:
instruction = new PushShort();
parameters.Add(Value.FromInteger(reader.ReadUInt16()));
break;
case InstructionType.End:
instruction = new End();
break;
case InstructionType.EA_CallNamedMethod:
instruction = new CallNamedMethod();
parameters.Add(Value.FromConstant(reader.ReadByte()));
break;
case InstructionType.Var:
instruction = new Var();
break;
case InstructionType.EA_PushRegister:
instruction = new PushRegister();
parameters.Add(Value.FromInteger(reader.ReadByte()));
break;
case InstructionType.EA_PushConstantWord:
instruction = new PushConstantWord();
parameters.Add(Value.FromConstant(reader.ReadUInt16()));
break;
case InstructionType.EA_CallFuncPop:
instruction = new CallFunctionPop();
break;
case InstructionType.StrictEqual:
instruction = new StrictEquals();
break;
default:
throw new InvalidDataException("Unimplemented bytecode instruction:" + type.ToString());
}
if (instruction != null)
{
instruction.Parameters = parameters;
instructions.Add(instructionPosition, instruction);
}
}
}
return(new InstructionCollection(instructions));
}
public void Parse()
{
var current = _reader.BaseStream.Position;
_reader.BaseStream.Seek(_offset, SeekOrigin.Begin);
bool parsing = true;
bool branched = false;
int branchBytes = 0;
while (parsing)
{
//now reader the instructions
var type = _reader.ReadByteAsEnum <InstructionType>();
var aligned = InstructionAlignment.IsAligned(type);
if (aligned)
{
var padding = _reader.Align(4);
if (padding > 0)
{
Items.Add(new Padding(padding));
if (branched)
{
branchBytes -= (int)padding;
if (branchBytes <= 0)
{
branched = false;
branchBytes = 0;
}
}
}
}
InstructionBase instruction = null;
List <Value> parameters = new List <Value>();
switch (type)
{
case InstructionType.ToNumber:
instruction = new ToNumber();
break;
case InstructionType.NextFrame:
instruction = new NextFrame();
break;
case InstructionType.Play:
instruction = new Play();
break;
case InstructionType.Stop:
instruction = new Stop();
break;
case InstructionType.Add:
instruction = new Add();
break;
case InstructionType.Subtract:
instruction = new Subtract();
break;
case InstructionType.Multiply:
instruction = new Multiply();
break;
case InstructionType.Divide:
instruction = new Divide();
break;
case InstructionType.Not:
instruction = new Not();
break;
case InstructionType.StringEquals:
instruction = new StringEquals();
break;
case InstructionType.Pop:
instruction = new Pop();
break;
case InstructionType.ToInteger:
instruction = new ToInteger();
break;
case InstructionType.GetVariable:
instruction = new GetVariable();
break;
case InstructionType.SetVariable:
instruction = new SetVariable();
break;
case InstructionType.StringConcat:
instruction = new StringConcat();
break;
case InstructionType.GetProperty:
instruction = new GetProperty();
break;
case InstructionType.SetProperty:
instruction = new SetProperty();
break;
case InstructionType.Trace:
instruction = new Trace();
break;
case InstructionType.Delete:
instruction = new Delete();
break;
case InstructionType.Delete2:
instruction = new Delete2();
break;
case InstructionType.DefineLocal:
instruction = new DefineLocal();
break;
case InstructionType.CallFunction:
instruction = new CallFunction();
break;
case InstructionType.Return:
instruction = new Return();
break;
case InstructionType.NewObject:
instruction = new NewObject();
break;
case InstructionType.InitArray:
instruction = new InitArray();
break;
case InstructionType.InitObject:
instruction = new InitObject();
break;
case InstructionType.TypeOf:
instruction = new InitObject();
break;
case InstructionType.Add2:
instruction = new Add2();
break;
case InstructionType.LessThan2:
instruction = new LessThan2();
break;
case InstructionType.Equals2:
instruction = new Equals2();
break;
case InstructionType.ToString:
instruction = new ToString();
break;
case InstructionType.PushDuplicate:
instruction = new PushDuplicate();
break;
case InstructionType.GetMember:
instruction = new GetMember();
break;
case InstructionType.SetMember:
instruction = new SetMember();
break;
case InstructionType.Increment:
instruction = new Increment();
break;
case InstructionType.Decrement:
instruction = new Decrement();
break;
case InstructionType.CallMethod:
instruction = new CallMethod();
break;
case InstructionType.Enumerate2:
instruction = new Enumerate2();
break;
case InstructionType.EA_PushThis:
instruction = new PushThis();
break;
case InstructionType.EA_PushZero:
instruction = new PushZero();
break;
case InstructionType.EA_PushOne:
instruction = new PushOne();
break;
case InstructionType.EA_CallFunc:
instruction = new CallFunc();
break;
case InstructionType.EA_CallMethodPop:
instruction = new CallMethodPop();
break;
case InstructionType.BitwiseXOr:
instruction = new BitwiseXOr();
break;
case InstructionType.Greater:
instruction = new Greater();
break;
case InstructionType.EA_PushThisVar:
instruction = new PushThisVar();
break;
case InstructionType.EA_PushGlobalVar:
instruction = new PushGlobalVar();
break;
case InstructionType.EA_ZeroVar:
instruction = new ZeroVar();
break;
case InstructionType.EA_PushTrue:
instruction = new PushTrue();
break;
case InstructionType.EA_PushFalse:
instruction = new PushFalse();
break;
case InstructionType.EA_PushNull:
instruction = new PushNull();
break;
case InstructionType.EA_PushUndefined:
instruction = new PushUndefined();
break;
case InstructionType.GotoFrame:
instruction = new GotoFrame();
parameters.Add(Value.FromInteger(_reader.ReadInt32()));
break;
case InstructionType.GetURL:
instruction = new GetUrl();
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.SetRegister:
instruction = new SetRegister();
parameters.Add(Value.FromInteger(_reader.ReadInt32()));
break;
case InstructionType.ConstantPool:
{
instruction = new ConstantPool();
var count = _reader.ReadUInt32();
var constants = _reader.ReadFixedSizeArrayAtOffset <uint>(() => _reader.ReadUInt32(), count);
foreach (var constant in constants)
{
parameters.Add(Value.FromConstant(constant));
}
}
break;
case InstructionType.GotoLabel:
instruction = new GotoLabel();
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.DefineFunction2:
{
instruction = new DefineFunction2();
var name = _reader.ReadStringAtOffset();
var nParams = _reader.ReadUInt32();
var nRegisters = _reader.ReadByte();
var flags = _reader.ReadUInt24();
//list of parameter strings
var paramList = _reader.ReadFixedSizeListAtOffset <FunctionArgument>(() => new FunctionArgument()
{
Register = _reader.ReadInt32(),
Parameter = _reader.ReadStringAtOffset(),
}, nParams);
parameters.Add(Value.FromString(name));
parameters.Add(Value.FromInteger((int)nParams));
parameters.Add(Value.FromInteger((int)nRegisters));
parameters.Add(Value.FromInteger((int)flags));
foreach (var param in paramList)
{
parameters.Add(Value.FromInteger(param.Register));
parameters.Add(Value.FromString(param.Parameter));
}
//body size of the function
parameters.Add(Value.FromInteger(_reader.ReadInt32()));
//skip 8 bytes
_reader.ReadUInt64();
}
break;
case InstructionType.PushData:
{
instruction = new PushData();
var count = _reader.ReadUInt32();
var constants = _reader.ReadFixedSizeArrayAtOffset <uint>(() => _reader.ReadUInt32(), count);
foreach (var constant in constants)
{
parameters.Add(Value.FromConstant(constant));
}
}
break;
case InstructionType.BranchAlways:
instruction = new BranchAlways();
if (!branched)
{
branchBytes = _reader.ReadInt32();
parameters.Add(Value.FromInteger(branchBytes));
if (branchBytes > 0)
{
branchBytes += (int)instruction.Size + 1;
branched = true;
}
}
else
{
parameters.Add(Value.FromInteger(_reader.ReadInt32()));
}
break;
case InstructionType.GetURL2:
instruction = new GetUrl2();
break;
case InstructionType.DefineFunction:
{
instruction = new DefineFunction();
var name = _reader.ReadStringAtOffset();
//list of parameter strings
var paramList = _reader.ReadListAtOffset <string>(() => _reader.ReadStringAtOffset());
parameters.Add(Value.FromString(name));
parameters.Add(Value.FromInteger(paramList.Count));
foreach (var param in paramList)
{
parameters.Add(Value.FromString(param));
}
//body size of the function
parameters.Add(Value.FromInteger(_reader.ReadInt32()));
//skip 8 bytes
_reader.ReadUInt64();
}
break;
case InstructionType.BranchIfTrue:
instruction = new BranchIfTrue();
if (!branched)
{
branchBytes = _reader.ReadInt32();
parameters.Add(Value.FromInteger(branchBytes));
if (branchBytes > 0)
{
branchBytes += (int)instruction.Size + 1;
branched = true;
}
}
else
{
parameters.Add(Value.FromInteger(_reader.ReadInt32()));
}
break;
case InstructionType.GotoFrame2:
instruction = new GotoFrame2();
parameters.Add(Value.FromInteger(_reader.ReadByte()));
break;
case InstructionType.EA_PushString:
instruction = new PushString();
//the constant id that should be pushed
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.EA_PushConstantByte:
instruction = new PushConstantByte();
//the constant id that should be pushed
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.EA_GetStringVar:
instruction = new GetStringVar();
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.EA_SetStringVar:
instruction = new SetStringMember();
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.EA_GetStringMember:
instruction = new GetStringMember();
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.EA_SetStringMember:
instruction = new SetStringMember();
parameters.Add(Value.FromString(_reader.ReadStringAtOffset()));
break;
case InstructionType.EA_PushValueOfVar:
instruction = new PushValueOfVar();
//the constant id that should be pushed
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.EA_GetNamedMember:
instruction = new GetNamedMember();
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.EA_CallNamedFuncPop:
instruction = new CallNamedFuncPop();
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.EA_CallNamedFunc:
instruction = new CallNamedFunc();
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.EA_CallNamedMethodPop:
instruction = new CallNamedMethodPop();
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.EA_PushFloat:
instruction = new PushFloat();
parameters.Add(Value.FromFloat(_reader.ReadSingle()));
break;
case InstructionType.EA_PushByte:
instruction = new PushByte();
parameters.Add(Value.FromInteger(_reader.ReadByte()));
break;
case InstructionType.EA_PushShort:
instruction = new PushShort();
parameters.Add(Value.FromInteger(_reader.ReadUInt16()));
break;
case InstructionType.End:
instruction = new End();
if (!branched)
{
parsing = false;
}
break;
case InstructionType.EA_CallNamedMethod:
instruction = new CallNamedMethod();
parameters.Add(Value.FromConstant(_reader.ReadByte()));
break;
case InstructionType.Var:
instruction = new Var();
break;
default:
throw new InvalidDataException("Unimplemented bytecode instruction:" + type.ToString());
}
if (instruction != null)
{
instruction.Parameters = parameters;
Items.Add(instruction);
}
if (branched)
{
branchBytes -= (int)instruction.Size + 1;
if (branchBytes <= 0)
{
branched = false;
}
}
}
_reader.BaseStream.Seek(current, SeekOrigin.Begin);
}