public override bool Rewrite(CodeDescriptor decompilee, MethodBase callee, StackElement[] args, IDecompiler stack, IFunctionBuilder builder)
{
object[] outArgs;
object rsample = null;
if (callee is MethodInfo &&
!callee.HasCustomOrInjectedAttribute<IDoNotCallOnDecompilation>())
{
stack.TryGetReturnValueSample((MethodInfo)callee, args, out outArgs, out rsample);
}
Type returnType;
callee.IsFunctionOrCtor(out returnType);
TypeDescriptor rtype;
if (rsample != null)
rtype = TypeDescriptor.GetTypeOf(rsample);
else
rtype = returnType;
IntrinsicFunction ifun;
FunctionCall fcall;
if (args[1].Variability == EVariability.Constant &&
args[2].Variability == EVariability.Constant)
{
// constant arguments case
int first = (int)TypeConversions.ConvertValue(args[1].Sample, typeof(int));
int second = (int)TypeConversions.ConvertValue(args[2].Sample, typeof(int));
var range = new Range(first, second, EDimDirection.Downto);
ifun = new IntrinsicFunction(IntrinsicFunction.EAction.Slice, range)
{
MethodModel = callee
};
var fspec = new FunctionSpec(rtype)
{
CILRep = callee,
IntrinsicRep = ifun
};
fcall = new FunctionCall()
{
Callee = fspec,
Arguments = new Expression[] { args[0].Expr },
ResultType = rtype,
SetResultTypeClass = EResultTypeClass.ObjectReference
};
}
else
{
ifun = new IntrinsicFunction(IntrinsicFunction.EAction.Slice)
{
MethodModel = callee
};
var fspec = new FunctionSpec(rtype)
{
CILRep = callee,
IntrinsicRep = ifun
};
fcall = new FunctionCall()
{
Callee = fspec,
Arguments = args.Select(arg => arg.Expr).ToArray(),
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)
{
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;
}