public override bool Rewrite(
CodeDescriptor decompilee,
MethodBase callee,
StackElement[] args,
IDecompiler stack,
IFunctionBuilder builder)
{
if (args.Length == 0)
throw new InvalidOperationException("The attribute SignalProperty was applied to the wrong method");
LiteralReference refExpr = args[0].Expr as LiteralReference;
if (refExpr == null)
throw new InvalidOperationException("Unable to resolve port/signal reference expression");
ISignal sigSample = args[0].Sample as ISignal;
SignalRef sigRef = null;
LambdaLiteralVisitor llv = new LambdaLiteralVisitor()
{
OnVisitConstant = x =>
{
sigRef = ((ISignal)x.ConstantValue).ToSignalRef(Prop);
},
OnVisitSignalRef = x =>
{
sigRef = new SignalRef(x.Desc, Prop, x.Indices, x.IndexSample, x.IsStaticIndex);
},
OnVisitVariable = x =>
{
SignalArgumentDescriptor desc = decompilee.GetSignalArguments().Where(y => y.Name.Equals(x.Name)).Single();
sigRef = new SignalRef(desc, Prop);
},
OnVisitFieldRef = x =>
{
sigRef = ((ISignal)x.FieldDesc.ConstantValue).ToSignalRef(Prop);
},
OnVisitThisRef = x => { throw new InvalidOperationException(); },
OnVisitArrayRef = x => { throw new InvalidOperationException(); }
};
refExpr.ReferencedObject.Accept(llv);
ParameterInfo[] pis = callee.GetParameters();
switch (Prop)
{
case SignalRef.EReferencedProperty.ChangedEvent:
case SignalRef.EReferencedProperty.Cur:
case SignalRef.EReferencedProperty.FallingEdge:
case SignalRef.EReferencedProperty.Pre:
case SignalRef.EReferencedProperty.RisingEdge:
//if (pis.Length != 0 || callee.IsStatic)
// throw new InvalidOperationException("The attribute SignalProperty was applied to the wrong method.");
switch (Prop)
{
case SignalRef.EReferencedProperty.Cur:
case SignalRef.EReferencedProperty.Pre:
stack.Push(
sigRef,
sigSample != null ? sigSample.InitialValueObject : null);
break;
case SignalRef.EReferencedProperty.ChangedEvent:
stack.Push(
sigRef,
null);
break;
case SignalRef.EReferencedProperty.FallingEdge:
case SignalRef.EReferencedProperty.RisingEdge:
stack.Push(
sigRef,
false);
break;
default:
throw new NotImplementedException();
}
break;
case SignalRef.EReferencedProperty.Next:
if (pis.Length != 1 || callee.IsStatic)
throw new InvalidOperationException("The attribute SignalProperty was applied to the wrong method.");
builder.Store(sigRef, args[1].Expr);
decompilee.AddDrivenSignal(sigRef.Desc);
break;
default:
throw new NotImplementedException();
}
return true;
}
