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# An explorative peek into generating deterministic primes through a multi-level multi-language tunneling apparatus

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2 Apr 2010CPOL2 min read 89.3K   117   21   39
This paper is a summary of a research exercise conducted in conjunction by Nish Sivakumar, Professor Cuthbert Calculus, and Glenn Quagmire.

This article was written as a joke for April Fools Day 2010. Readers are advised not to take the contents of this article too seriously.

## Introduction

This paper is a summary of a research exercise conducted in conjunction by Nish Sivakumar, Professor Cuthbert Calculus, and Glenn Quagmire. The paper describes an explorative peek into generating deterministic primes through a multi-level multi-language tunneling apparatus. The example code is kept simple enough so as to keep focus on the fundamental problem we are attempting to solve. At the core, we start off with an inline assembler method consumed by an exported C function, wrapped and exported as a C++ class that's then consumed and exposed to the CLR through a C++/CLI wrapper, which is then used by a C# COM DLL that exposes an interface that is consumed through VBScript and executed through a command scriplet.

## Inline assembly

ASM
```int GenerateIndex(int num)
{
_asm
{
mov eax, dword ptr [num]
xor edx, edx
mov ecx, 3
idiv ecx
mov eax, edx
}
}```

This is the core randomization code and it's in assembly to keep things simple and lightweight. In the example we restrict the number of cached prime numbers to 3 and hence the divisor in the code.

## C DLL Export

C++
```int __stdcall DllMain()
{
return 0;
}

int primes[] = { 29, 37, 61 };

__declspec(dllexport) int GetDetPrime()
{
return primes[GenerateIndex(GetTickCount())];
}```

The C DLL essentially exports a simple function that returns a deterministic prime, and the code internally delegates the randomization logic to the assembler code. At this point the library is consumable by any framework or layer capable of calling a C DLL.

## C++ class Export

C++
```// The header file
class __declspec(dllexport) CDetPrimeLib
{
public:
int GetDetPrime();
};

// Implementation file
#pragma comment(lib, "DetPrime.lib")

extern "C" __declspec(dllimport) int GetDetPrime();

int CDetPrimeLib::GetDetPrime()
{
return ::GetDetPrime();
}```

Here we wrap the C DLL and export it as a C++ class to natively support the most popular programming language in the world. It's a very thin wrapper since we don't want to add any overhead at this point.

## CLI wrapper using C++/CLI

MC++
```#pragma once

#pragma comment(lib, "DetPrimeLib.lib")

class __declspec(dllimport) CDetPrimeLib
{
public:
int GetDetPrime();
};

namespace DetPrimeManWrap
{
public ref class DetPrimeManaged
{
CDetPrimeLib* pNative;

public:
DetPrimeManaged()
{
pNative = new CDetPrimeLib();
}

~DetPrimeManaged()
{
this->!DetPrimeManaged();
}

!DetPrimeManaged()
{
delete pNative;
}

int GetDetPrime()
{
return pNative->GetDetPrime();
}
};
}```

While we have already provided enough API exposure to be considered mainstream, it makes good sense to also directly support .NET and thus we have a C++/CLI wrapper library that exposes the functionality to managed callers.

## COM wrapper using C#

C#
```[assembly: ComVisible(true)]
[assembly: Guid("6b4bf847-a45d-4f87-ba53-0d4a9fffa975")]
[assembly: AssemblyVersion("1.0.1.1")]
[assembly: AssemblyFileVersion("1.0.1.1")]

namespace DetPrimeCOM
{
using DetPrimeManWrap;

[Guid("18535B5E-0561-4BA8-8CF6-85B148F3A4CF")]
[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
public interface IDetPrime
{
int GetDetPrime();
}

[Guid("2299461C-1FFB-4D5D-A521-0830F93FB5CC")]
[ComVisible(true)]
[ClassInterface(ClassInterfaceType.AutoDual)]
public class DetPrime : IDetPrime
{
public int GetDetPrime()
{
return new DetPrimeManaged().GetDetPrime();
}
}
}```

Since we support .NET we may as well support COM too and that's what the above C# code does. The code is now ready for COM consumption.

## VBScript caller

VBScript
```Dim detPrime
Set detPrime = CreateObject("DetPrimeCOM.DetPrime")
Wscript.Echo "The generated Deterministic Prime is " & detPrime.GetDetPrime```

VB6 is now officially extinct and so we resort to a simple VBScript script to invoke the COM library.

## Command scriplet

`@%windir%\syswow64\cscript.exe /nologo DetPrime.vbs`

And the last piece in our architecture is the command scriplet which executes the VBScript through cscript.exe so we can run it on a 64 bit OS, even though the code is 32 bit to support the vast majority of frameworks out there.

## Conclusion

This article was written as a joke for April Fools Day 2010. Readers are advised not to take the contents of this article too seriously.

Written By
United States
Nish Nishant is a technology enthusiast from Columbus, Ohio. He has over 20 years of software industry experience in various roles including Chief Technology Officer, Senior Solution Architect, Lead Software Architect, Principal Software Engineer, and Engineering/Architecture Team Leader. Nish is a 14-time recipient of the Microsoft Visual C++ MVP Award.

Nish authored C++/CLI in Action for Manning Publications in 2005, and co-authored Extending MFC Applications with the .NET Framework for Addison Wesley in 2003. In addition, he has over 140 published technology articles on CodeProject.com and another 250+ blog articles on his WordPress blog. Nish is experienced in technology leadership, solution architecture, software architecture, cloud development (AWS and Azure), REST services, software engineering best practices, CI/CD, mentoring, and directing all stages of software development.

Nish's Technology Blog : voidnish.wordpress.com

Written By
Program Manager
United States
I am a former airline pilot who's currently doing research on deterministic primes under Professor Calculus.

Written By
Architect
United States
I am a multiple PhD with a deep interest in science. My recent research has been in the field of deterministic prime numbers.

## Comments and Discussions

 First PrevNext
 My Vote of 5 thatraja31-Mar-14 20:56 thatraja 31-Mar-14 20:56
 Re: My Vote of 5 Nish Nishant2-Apr-14 4:06 Nish Nishant 2-Apr-14 4:06
 My vote of 5 gndnet7-Nov-12 7:44 gndnet 7-Nov-12 7:44
 My Vote of 5 thatraja1-Apr-11 5:44 thatraja 1-Apr-11 5:44
 Re: My Vote of 5 Nish Nishant1-Apr-11 9:29 Nish Nishant 1-Apr-11 9:29
 Excellent article thatraja14-Jan-11 3:40 thatraja 14-Jan-11 3:40
 Re: Excellent article Nish Nishant14-Jan-11 3:53 Nish Nishant 14-Jan-11 3:53
 Never tell the same joke twice User 5924122-Dec-10 16:25 User 59241 22-Dec-10 16:25
 Whoa Andy Brummer2-Apr-10 5:13 Andy Brummer 2-Apr-10 5:13
 Re: Whoa Nish Nishant2-Apr-10 5:22 Nish Nishant 2-Apr-10 5:22
 Re: Whoa Pete O'Hanlon2-Apr-10 9:09 Pete O'Hanlon 2-Apr-10 9:09
 Plzzzz Help Abhinav S2-Apr-10 4:45 Abhinav S 2-Apr-10 4:45
 Re: Plzzzz Help Nish Nishant2-Apr-10 4:46 Nish Nishant 2-Apr-10 4:46
 Re: Plzzzz Help Abhinav S2-Apr-10 5:16 Abhinav S 2-Apr-10 5:16
 Nice - but impressive ! Emilio Garavaglia1-Apr-10 21:22 Emilio Garavaglia 1-Apr-10 21:22
 Re: Nice - but impressive ! Nish Nishant2-Apr-10 2:02 Nish Nishant 2-Apr-10 2:02
 This could lead to man love. Pete O'Hanlon1-Apr-10 9:27 Pete O'Hanlon 1-Apr-10 9:27
 Re: This could lead to man love. Nish Nishant1-Apr-10 12:34 Nish Nishant 1-Apr-10 12:34
 Excellent Douglas Troy1-Apr-10 9:16 Douglas Troy 1-Apr-10 9:16
 Re: Excellent Nish Nishant1-Apr-10 12:34 Nish Nishant 1-Apr-10 12:34
 Memory hog... Mike Rich1-Apr-10 8:37 Mike Rich 1-Apr-10 8:37
 Re: Memory hog... Nish Nishant1-Apr-10 12:33 Nish Nishant 1-Apr-10 12:33
 Brilliant stuff! Ravi Bhavnani1-Apr-10 7:32 Ravi Bhavnani 1-Apr-10 7:32
 Re: Brilliant stuff! Nish Nishant1-Apr-10 12:33 Nish Nishant 1-Apr-10 12:33
 My vote of 1 sam.hill1-Apr-10 4:54 sam.hill 1-Apr-10 4:54
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