// Design taken from https://github.com/pieterderycke/Jace

using System;

using System.Diagnostics.Contracts;

using System.Linq;

using ReClassNET.Memory;

using ReClassNET.Util;

namespace ReClassNET.AddressParser

{

class Interpreter

{

public IntPtr Execute(Operation operation, RemoteProcess process)

{

Contract.Requires(operation != null);

Contract.Requires(process != null);

if (operation is OffsetOperation)

{

return ((OffsetOperation)operation).Value;

}

else if (operation is ModuleOffsetOperation)

{

var module = process.GetModuleByName(((ModuleOffsetOperation)operation).Name);

if (module != null)

{

return module.Start;

}

return IntPtr.Zero;

}

else if (operation is AdditionOperation)

{

var addition = (AdditionOperation)operation;

return Execute(addition.Argument1, process).Add(Execute(addition.Argument2, process));

}

else if (operation is SubtractionOperation)

{

var addition = (SubtractionOperation)operation;

return Execute(addition.Argument1, process).Sub(Execute(addition.Argument2, process));

}

else if (operation is MultiplicationOperation)

{

var multiplication = (MultiplicationOperation)operation;

return Execute(multiplication.Argument1, process).Mul(Execute(multiplication.Argument2, process));

}

else if (operation is DivisionOperation)

{

var division = (DivisionOperation)operation;

return Execute(division.Dividend, process).Div(Execute(division.Divisor, process));

}

else if (operation is ReadPointerOperation)

{

return process.ReadRemoteObject<IntPtr>(Execute(((ReadPointerOperation)operation).Argument, process));

}

throw new ArgumentException($"Unsupported operation '{operation.GetType().FullName}'.");

}

}

}