This article is about a simple C++ class for reading and writing variable-length data streams. This feature is often required when programming compression routines like LZW, or when dealing with binary formats like Flash or PDF. It offers the developer a possibility to write binary chunks of custom size: like 11 bits, or 27 bits, etc. So, basically, output is byte-aligned, but the inner structure can hold different length data chunks.
I found a working solution to this problem here on the CodeProject. But, this one is written in C# .NET, so I could not use it directly. I have not translated the original article, but written this one from scratch. I hope that someone will find this work useful.
Using the Code
Using the class
CBitStream is very simple. Please see the code below:
bitStream.WriteData((LPBYTE)"ANSI text...", 12);
bitStream.WriteData((LPWORD)_T("UNICODE text..."), 15);
bitStream.SaveStream(_T("Enter output file path here..."));
Points of Interest
I have found that writing the
CBitStream class described in this article was not too difficult as I have thought in first place. Also, now I have a simple tool that can help me in my everyday work.
CBitStream class version 1.0.
He has a master degree in Computer Science at Faculty of Electronics in Nis (Serbia), and works as a C++/C# application developer for Windows platforms since 2001. He likes traveling, reading and meeting new people and cultures.