protected void InsertEarlyReturnLocal(ASMethod method, byte local)
{
method.Body.Bytecode[0] = (byte)(local + OPCode.GetLocal_0);
method.Body.Bytecode[1] = (byte)OPCode.ReturnValue;
}
protected void InsertEarlyReturnTrue(ASMethod method)
{
method.Body.Bytecode[0] = (byte)OPCode.PushTrue;
method.Body.Bytecode[1] = (byte)OPCode.ReturnValue;
}
protected void RemoveHostSuffix(ABCFile abc, ASMethod connectMethod)
{
using (var inCode = new FlashReader(connectMethod.Body.Bytecode))
using (var outCode = new FlashWriter(inCode.Length))
{
int ifNeCount = 0;
while (inCode.Position != inCode.Length)
{
OPCode op = inCode.ReadOP();
outCode.WriteOP(op);
if (op == OPCode.IfNe && ++ifNeCount == 2)
{
var iFNeJumpCount = (int)inCode.ReadS24();
outCode.WriteS24(iFNeJumpCount + 6);
continue;
}
else if (op != OPCode.PushInt) continue;
int pushIntIndex = inCode.Read7BitEncodedInt();
int integerValue = abc.Constants.Integers[pushIntIndex];
switch (integerValue)
{
case 65244:
case 65185:
case 65191:
case 65189:
case 65188:
case 65174:
case 65238:
case 65184:
case 65171:
case 65172:
{
pushIntIndex = abc.Constants.AddInteger(65290);
break;
}
}
outCode.Write7BitEncodedInt(pushIntIndex);
}
connectMethod.Body.Bytecode = outCode.ToArray();
}
RemoveDeadFalseConditions(connectMethod.Body);
}
protected void ScanForMessageReference(Dictionary<string, ASClass> messageClasses, ASClass asClass, ASMethod method, int traitIndex, int messageRefCount = 0)
{
ABCFile abc = asClass.ABC;
ASClass messageClass = null;
using (var outCode = new FlashReader(method.Body.Bytecode))
{
while (outCode.IsDataAvailable)
{
OPCode op = outCode.ReadOP();
object[] values = outCode.ReadValues(op);
switch (op)
{
case OPCode.NewFunction:
{
var newFuncIndex = (int)values[0];
ASMethod newFuncMethod = abc.Methods[newFuncIndex];
ScanForMessageReference(messageClasses, asClass, newFuncMethod, traitIndex, messageRefCount);
break;
}
case OPCode.ConstructProp:
{
var constructPropIndex = (int)values[0];
if (messageClass != null)
{
ASMultiname constructPropType =
abc.Constants.Multinames[constructPropIndex];
if (constructPropType.ObjName == messageClass.Instance.Type.ObjName)
{
if (!_messageReferencesCache.ContainsKey(messageClass))
_messageReferencesCache[messageClass] = new List<Tuple<ASMethod, int>>();
_messageReferencesCache[messageClass].Add(
new Tuple<ASMethod, int>(method, (traitIndex + (++messageRefCount))));
}
messageClass = null;
}
break;
}
case OPCode.FindPropStrict:
{
var findPropStrictIndex = (int)values[0];
string findPropStrictObjName = abc.Constants
.Multinames[findPropStrictIndex].ObjName;
if (messageClasses.ContainsKey(findPropStrictObjName))
{
messageClass = messageClasses[findPropStrictObjName];
// Incoming messages currently not supported.
if (IncomingTypes.ContainsValue(messageClass))
messageClass = null;
}
break;
}
}
}
}
}
protected virtual void WriteMethodHashData(BinaryWriter hashInput, ASMethod asMethod, bool writeInstructions)
{
WriteTraitsHashData(hashInput, asMethod.Body);
hashInput.Write(asMethod.Body.Exceptions.Count);
hashInput.Write(asMethod.Body.MaxStack);
hashInput.Write(asMethod.Body.LocalCount);
hashInput.Write(asMethod.Body.MaxScopeDepth);
hashInput.Write(asMethod.Body.InitialScopeDepth);
hashInput.Write(asMethod.Parameters.Count);
foreach (ASParameter parameter in asMethod.Parameters)
{
if (parameter.IsOptional)
{
hashInput.Write(parameter.IsOptional);
WriteValueSlotHashData(hashInput, parameter);
}
if (parameter.Type != null)
WriteMultinameHashData(hashInput, parameter.Type);
}
if (writeInstructions)
{
using (var codeOutput =
new FlashReader(asMethod.Body.Bytecode))
{
while (codeOutput.IsDataAvailable)
{
OPCode op = codeOutput.ReadOP();
object[] values = codeOutput.ReadValues(op);
hashInput.Write((byte)op);
}
}
}
}
