private PacketValue[] GetIncomingStructure(ASInstance instance, ASMethod method)
{
if (method.Body.Exceptions.Count > 0)
{
return(null);
}
ASCode code = method.Body.ParseCode();
if (code.JumpExits.Count > 0 || code.SwitchExits.Count > 0)
{
return(null);
}
List <PacketValue> structure = new List <PacketValue>();
ABCFile abc = method.GetABC();
for (int i = 0; i < code.Count; i++)
{
ASInstruction instruction = code[i];
if (instruction.OP != OPCode.GetLocal_1)
{
continue;
}
ASInstruction next = code[++i];
switch (next.OP)
{
case OPCode.CallProperty:
{
CallPropertyIns callProperty = (CallPropertyIns)next;
if (callProperty.ArgCount > 0)
{
ASMultiname propertyName = null;
ASInstruction previous = code[i - 2];
switch (previous.OP)
{
case OPCode.GetLex:
{
GetLexIns getLex = (GetLexIns)previous;
propertyName = getLex.TypeName;
break;
}
case OPCode.ConstructProp:
{
ConstructPropIns constructProp = (ConstructPropIns)previous;
propertyName = constructProp.PropertyName;
break;
}
case OPCode.GetLocal_0:
{
propertyName = instance.QName;
break;
}
}
ASInstance innerInstance = abc.GetInstance(propertyName);
ASMethod innerMethod = innerInstance.GetMethod(callProperty.PropertyName.Name, null, callProperty.ArgCount);
if (innerMethod == null)
{
ASClass innerClass = abc.GetClass(propertyName);
innerMethod = innerClass.GetMethod(callProperty.PropertyName.Name, null, callProperty.ArgCount);
}
PacketValue[] innerStructure = GetIncomingStructure(innerInstance, innerMethod);
if (innerStructure == null)
{
return(null);
}
structure.AddRange(innerStructure);
}
else
{
if (!TryGetPacketValue(callProperty.PropertyName, null, out PacketValue piece))
{
return(null);
}
structure.Add(piece);
}
break;
}
case OPCode.ConstructProp:
{
ConstructPropIns constructProp = (ConstructPropIns)next;
ASInstance innerInstance = abc.GetInstance(constructProp.PropertyName);
PacketValue[] innerStructure = GetIncomingStructure(innerInstance, innerInstance.Constructor);
if (innerStructure == null)
{
return(null);
}
structure.AddRange(innerStructure);
break;
}
case OPCode.ConstructSuper:
{
ASInstance superInstance = abc.GetInstance(instance.Super);
PacketValue[] innerStructure = GetIncomingStructure(superInstance, superInstance.Constructor);
if (innerStructure == null)
{
return(null);
}
structure.AddRange(innerStructure);
break;
}
case OPCode.CallSuper:
{
CallSuperIns callSuper = (CallSuperIns)next;
ASInstance superInstance = abc.GetInstance(instance.Super);
ASMethod superMethod = superInstance.GetMethod(callSuper.MethodName.Name, null, callSuper.ArgCount);
PacketValue[] innerStructure = GetIncomingStructure(superInstance, superMethod);
if (innerStructure == null)
{
return(null);
}
structure.AddRange(innerStructure);
break;
}
case OPCode.CallPropVoid:
{
CallPropVoidIns callPropVoid = (CallPropVoidIns)next;
if (callPropVoid.ArgCount != 0)
{
return(null);
}
if (!TryGetPacketValue(callPropVoid.PropertyName, null, out PacketValue piece))
{
return(null);
}
structure.Add(piece);
break;
}
default: return(null);
}
}
return(structure.Count == 0 ? null : structure.ToArray());
}
private List <HReference> FindMessageReferences(ASClass fromClass, ASContainer fromContainer, ASMethod fromMethod)
{
int instructionRank = 0;
ABCFile abc = fromMethod.GetABC();
Stack <ASMultiname> nameStack = new Stack <ASMultiname>();
List <HReference> references = new List <HReference>();
ASContainer container = null;
ASCode code = fromMethod.Body.ParseCode();
for (int i = 0; i < code.Count; i++)
{
ASInstruction instruction = code[i];
switch (instruction.OP)
{
default: continue;
case OPCode.NewFunction:
{
NewFunctionIns newFunction = (NewFunctionIns)instruction;
references.AddRange(FindMessageReferences(fromClass, fromContainer, newFunction.Method));
continue;
}
case OPCode.GetProperty:
{
GetPropertyIns getProperty = (GetPropertyIns)instruction;
nameStack.Push(getProperty.PropertyName);
continue;
}
case OPCode.GetLex:
{
GetLexIns getLex = (GetLexIns)instruction;
container = abc.GetClass(getLex.TypeName.Name);
continue;
}
case OPCode.GetLocal_0:
{
container = fromContainer;
continue;
}
case OPCode.ConstructProp:
{
ConstructPropIns constructProp = (ConstructPropIns)instruction;
nameStack.Push(constructProp.PropertyName);
break;
}
}
ASMultiname messageQName = nameStack.Pop();
if (string.IsNullOrWhiteSpace(messageQName.Name))
{
continue;
}
ASClass messageClass = abc.GetClass(messageQName.Name);
if (messageClass == null)
{
continue;
}
if (!_messages.TryGetValue(messageClass, out HMessage message))
{
continue;
}
if (message.References.Any(r => r.FromMethod == fromMethod))
{
continue;
}
HReference reference = new HReference();
message.References.Add(reference);
if (message.IsOutgoing)
{
reference.FromClass = fromClass;
reference.FromMethod = fromMethod;
reference.InstructionRank = ++instructionRank;
reference.IsAnonymous = (!fromMethod.IsConstructor && fromMethod.Trait == null);
references.Add(reference);
}
else
{
ASMultiname methodName = nameStack.Pop();
ASMethod callbackMethod = fromContainer.GetMethod(methodName.Name);
if (callbackMethod == null)
{
callbackMethod = container.GetMethod(methodName.Name);
if (callbackMethod == null)
{
ASMultiname slotName = nameStack.Pop();
ASTrait hostTrait = container.GetTraits(TraitKind.Slot)
.FirstOrDefault(st => st.QName == slotName);
container = abc.GetInstance(hostTrait.Type.Name);
callbackMethod = container.GetMethod(methodName.Name);
}
}
reference.FromMethod = callbackMethod;
}
}
return(references);
}
