public override bool Rewrite(CodeDescriptor decompilee, MethodBase callee, StackElement[] args, IDecompiler stack, IFunctionBuilder builder)
{
IntrinsicFunction ifun = new IntrinsicFunction(Kind, Parameter)
{
MethodModel = callee
};
int skip = SkipFirstArg ? 1 : 0;
Expression[] eargs = args.Skip(skip).Select(arg => arg.Expr).ToArray();
Type returnType;
if (!callee.IsFunctionOrCtor(out returnType))
{
FunctionSpec fspec = new FunctionSpec(typeof(void))
{
CILRep = callee,
IntrinsicRep = ifun
};
builder.Call(fspec, eargs);
}
else
{
object[] outArgs;
object rsample = null;
if (callee is MethodInfo &&
!callee.HasCustomOrInjectedAttribute<IDoNotCallOnDecompilation>())
{
stack.TryGetReturnValueSample((MethodInfo)callee, args, out outArgs, out rsample);
}
TypeDescriptor rtype;
if (rsample != null)
rtype = TypeDescriptor.GetTypeOf(rsample);
else
rtype = returnType;
FunctionSpec fspec = new FunctionSpec(rtype)
{
CILRep = callee,
IntrinsicRep = ifun
};
FunctionCall fcall = new FunctionCall()
{
Callee = fspec,
Arguments = eargs,
ResultType = rtype,
SetResultTypeClass = EResultTypeClass.ObjectReference
};
stack.Push(fcall, rsample);
}
return true;
}
public override bool Rewrite(
CodeDescriptor decompilee,
MethodBase callee,
StackElement[] args,
IDecompiler stack,
IFunctionBuilder builder)
{
if (args.Length < 2)
throw new InvalidOperationException("The attribute SignalIndexer 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");
DimSpec[] dimSamples = new DimSpec[args.Length - 1];
Expression[] indices = args.Skip(1).Select(arg => arg.Expr).ToArray();
bool isStatic = true;
for (int i = 1; i < args.Length; i++)
{
var convidx = TypeConversions.ConvertValue(args[i].Sample, typeof(int));
if (convidx != null)
{
dimSamples[i - 1] = (int)convidx;
}
else if (args[i].Sample is Range)
{
dimSamples[i - 1] = (Range)args[i].Sample;
}
else
{
dimSamples = null;
break;
}
// EVariability.LocalVariable is not static as well, since variables
// inside for loops will have that variability.
if (args[i].Variability != EVariability.Constant)
isStatic = false;
}
IndexSpec indexSpec = null;
indexSpec = new IndexSpec(dimSamples);
SignalRef sigRef = null;
LambdaLiteralVisitor llv = new LambdaLiteralVisitor()
{
OnVisitConstant = x =>
{
sigRef = new SignalRef(
((SignalBase)x.ConstantValue).Descriptor,
SignalRef.EReferencedProperty.Instance,
new Expression[][] { indices }, indexSpec, isStatic);
},
OnVisitFieldRef = x => { throw new InvalidOperationException(); },
OnVisitSignalRef = x =>
{
sigRef = new SignalRef(
x.Desc,
x.Prop,
x.Indices.Concat(new Expression[][] { indices }),
indexSpec.Project(x.IndexSample),
x.IsStaticIndex && isStatic);
},
OnVisitVariable = x => { throw new InvalidOperationException(); },
OnVisitThisRef = x => { throw new InvalidOperationException(); }
};
refExpr.ReferencedObject.Accept(llv);
object rsample = null;
Type[] argTypes = args
.Skip(1)
.Select(a => a.Expr.ResultType.CILType)
.ToArray();
object[] argSamples = args
.Select(a => a.Sample)
.ToArray();
MethodInfo indexerSampleMethod = callee.DeclaringType.GetMethod(
"GetIndexerSample",
BindingFlags.Instance | BindingFlags.NonPublic,
null,
argTypes,
null);
if (indexerSampleMethod != null && argSamples.All(a => a != null))
{
rsample = indexerSampleMethod.Invoke(argSamples);
}
else
{
try
{
rsample = callee.Invoke(args.Select(x => x.Sample).ToArray());
}
catch (TargetInvocationException)
{
}
}
stack.Push(sigRef, rsample);
return true;
}