Programing Source Code Examples

Defensive Programming Techniques

Defensive Programming Techniques

This source code is from Thinking in C++, 2nd Edition, Volume 2, by Bruce Eckel & Chuck Allison. You can use Borland, G++ (For version 3 and above only), Microsoft (For C++ with .NET only) to compile and build this source code. Writing perfect software may be a daunting task for developers, but a few defensive techniques which are routinely applied can go a long way toward narrowing the gap between code and ideal. Defensive programming practices are often used where high availability of the application is required, safety if utmost concern, or security is needed for application to work.

Base 64 Encoding and Decoding

256-bit Serpent VB Implementation

This is a slow but working Visual Basic implementation of the 256-bit Serpent algorithm. Serpent was a finalist for Advanced Encryption Standard (AES) and appears to be a very secure powerful algorithm. The Advanced Encryption Standard, or AES, is a symmetric block cipher chosen by the U.S. government for the encryption of classified electronic data and is implemented in software and hardware throughout the world to encrypt sensitive data.

Base85 Encoding

BASE 85 Encoding VB Class

This is a BASE85 Encoding Visual Basic class that expands the text to be encoded by 4:5 i.e. uses 5 ASCII characters to represent 4 bytes with 80% accuracy. Used in Postscript and PDF documents. Useful if binary data needs to be persisted in ASCII text.

Basic presentation

Exporting PowerPoint Slides to Images in C#

This is a very simple Visual Basic source code to export all the slides from a PowerPoint presentation. This source code can export images in any specified image format like .jpg, .bmp or .gif. I wrote this function while I was working on my undergraduate project “PowerPoint to XML Interchangeability”. I had to make some sort of PowerPoint Viewer to view the slides so I wrote this function to export PowerPoint slides into image sequences so that I can display them into an image control and export the images at a temporary location.

Block a Specific IP Address in PHP

Block a Specific IP Address in PHP

In this article, we’ll explore how to block a specific IP address or a list of addresses from accessing a webpage using PHP. By leveraging PHP’s capabilities, you can fortify your web applications against unauthorized access and potential security threats. Let’s delve into the process of implementing IP-based access restrictions to bolster the security of your PHP-powered webpages.

Scroll to Top