/// <summary>
/// decompile byte code to action objects
/// </summary>
public ArrayList Decompile(byte[] codeblock)
{
LabelId = 1;
ArrayList actionRec = ReadActions(codeblock);
ExplodePushLists(actionRec);
// find argument count on stack
// e.g. for actions likecallFunction or initArray
CodeTraverser trav = new CodeTraverser(actionRec);
trav.Traverse(new InvocationExaminer());
return actionRec;
}
/// <summary>
/// Examine byte code action at index in action record.
/// </summary>
public void Examine(int index, BaseAction a)
{
ActionPush p;
int args;
CodeTraverser trav;
switch (a.Code)
{
case (int)ActionCode.StackSwap:
object o1 = stack.Pop();
object o2 = stack.Pop();
stack.Push(o1);
stack.Push(o2);
break;
case (int)ActionCode.PushDuplicate:
stack.Push(stack.Peek());
break;
case (int)ActionCode.Push:
stack.Push(a);
break;
// --------------------------------------
case (int)ActionCode.CallMethod:
ActionCallMethod cm = a as ActionCallMethod;
stack.Pop(); // name
stack.Pop(); // script object
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i = 0; i < args; i++)
{
stack.Pop();
}
if (args > -1)
{
cm.NumArgs = args;
}
stack.Push(null);
break;
case (int)ActionCode.CallFunction:
ActionCallFunction cf = a as ActionCallFunction;
stack.Pop(); // name
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i = 0; i < args; i++)
{
stack.Pop();
}
if (args > -1)
{
cf.NumArgs = args;
}
stack.Push(null);
break;
// --------------------------------------
case (int)ActionCode.InitArray:
ActionInitArray ia = a as ActionInitArray;
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i = 0; i < args; i++)
{
stack.Pop();
}
ia.NumValues = args;
stack.Push(null);
break;
case (int)ActionCode.InitObject:
ActionInitObject io = a as ActionInitObject;
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i = 0; i < args; i++)
{
stack.Pop();
stack.Pop();
}
io.NumProps = args;
stack.Push(null);
break;
case (int)ActionCode.NewObject:
ActionNewObject n = a as ActionNewObject;
stack.Pop();
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i = 0; i < args; i++)
{
stack.Pop();
}
n.NumArgs = args;
stack.Push(null);
break;
case (int)ActionCode.NewMethod:
ActionNewMethod nm = a as ActionNewMethod;
stack.Pop();
stack.Pop();
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i = 0; i < args; i++)
{
stack.Pop();
}
nm.NumArgs = args;
stack.Push(null);
break;
case (int)ActionCode.Implements:
ActionImplements aimpl = a as ActionImplements;
stack.Pop(); // constructor function
// interface count
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
// pop interfaces
for (int i = 0; i < args; i++)
{
stack.Pop();
}
aimpl.NumInterfaces = args;
break;
// --------------------------------------
case (int)ActionCode.DefineFunction:
ActionDefineFunction f = a as ActionDefineFunction;
trav = new CodeTraverser(f.ActionRecord);
trav.Traverse(new InvocationExaminer());
stack.Push(null);
break;
case (int)ActionCode.DefineFunction2:
ActionDefineFunction2 f2 = a as ActionDefineFunction2;
trav = new CodeTraverser(f2.ActionRecord);
trav.Traverse(new InvocationExaminer());
stack.Push(null);
break;
// --------------------------------------
default:
try {
for (int i = 0; i < a.PopCount; i++)
{
stack.Pop();
}
for (int i = 0; i < a.PushCount; i++)
{
stack.Push(null);
}
}
// stack empty
catch (InvalidOperationException e) {
if (e != null)
{
}
stack.Clear();
}
break;
}
}
/// <summary>
/// Examine byte code action at index in action record.
/// </summary>
public void Examine(int index,BaseAction a)
{
ActionPush p;
int args;
CodeTraverser trav;
switch ( a.Code ) {
case (int)ActionCode.StackSwap:
object o1 = stack.Pop();
object o2 = stack.Pop();
stack.Push(o1);
stack.Push(o2);
break;
case (int)ActionCode.PushDuplicate:
stack.Push(stack.Peek());
break;
case (int)ActionCode.Push:
stack.Push(a);
break;
// --------------------------------------
case (int)ActionCode.CallMethod:
ActionCallMethod cm = a as ActionCallMethod;
stack.Pop(); // name
stack.Pop(); // script object
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i=0; i<args; i++) {
stack.Pop();
}
if (args>-1) cm.NumArgs = args;
stack.Push(null);
break;
case (int)ActionCode.CallFunction:
ActionCallFunction cf = a as ActionCallFunction;
stack.Pop(); // name
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i=0; i<args; i++) {
stack.Pop();
}
if (args>-1) cf.NumArgs = args;
stack.Push(null);
break;
// --------------------------------------
case (int)ActionCode.InitArray:
ActionInitArray ia = a as ActionInitArray;
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i=0; i<args; i++) {
stack.Pop();
}
ia.NumValues = args;
stack.Push(null);
break;
case (int)ActionCode.InitObject:
ActionInitObject io = a as ActionInitObject;
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i=0; i<args; i++) {
stack.Pop();
stack.Pop();
}
io.NumProps = args;
stack.Push(null);
break;
case (int)ActionCode.NewObject:
ActionNewObject n = a as ActionNewObject;
stack.Pop();
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i=0; i<args; i++) {
stack.Pop();
}
n.NumArgs = args;
stack.Push(null);
break;
case (int)ActionCode.NewMethod:
ActionNewMethod nm = a as ActionNewMethod;
stack.Pop();
stack.Pop();
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
for (int i=0; i<args; i++) {
stack.Pop();
}
nm.NumArgs = args;
stack.Push(null);
break;
case (int)ActionCode.Implements:
ActionImplements aimpl = a as ActionImplements;
stack.Pop(); // constructor function
// interface count
p = stack.Pop() as ActionPush;
args = p.GetIntValue();
// pop interfaces
for (int i=0; i<args; i++) {
stack.Pop();
}
aimpl.NumInterfaces = args;
break;
// --------------------------------------
case (int)ActionCode.DefineFunction:
ActionDefineFunction f = a as ActionDefineFunction;
trav = new CodeTraverser(f.ActionRecord);
trav.Traverse(new InvocationExaminer());
stack.Push(null);
break;
case (int)ActionCode.DefineFunction2:
ActionDefineFunction2 f2 = a as ActionDefineFunction2;
trav = new CodeTraverser(f2.ActionRecord);
trav.Traverse(new InvocationExaminer());
stack.Push(null);
break;
// --------------------------------------
default:
try {
for (int i=0; i<a.PopCount; i++) {
stack.Pop();
}
for (int i=0; i<a.PushCount; i++) {
stack.Push(null);
}
}
// stack empty
catch (InvalidOperationException e) {
if (e!=null) {}
stack.Clear();
}
break;
}
}