All posts by Christoph Cullmann

Dr.-Ing. Christoph Cullmann is a Senior Software Engineer at AbsInt Angewandte Informatik GmbH. His work is focused on static analysis of both binary and source programs and the WCET analysis of embedded systems. In his spare time, he works on the KDE project and maintains the Kate editor application and component.

One great man less :(

Dennis MacAlistair Ritchie died at home this weekend.

Dennis MacAlistair Ritchie

As the creator of the C programming language and one of the main developers of Unix, he impacted the life of me and other developers a lot.

Even today, 30 years after their initial creation, many people work on Unix like systems (like Linux or Mac OS) and develop in (Objective) C(++).

For me C was one of my starting languages for my real programming work and even today I analyze the whole day software written in C for embedded systems that control our modern world, be it the flight control of airplanes or engine control of cars.

Without his initial ideas and work, today there would be no Linux kernel, no Mac OS, …

We all owe him a lot. He changed the world.

Thanks for your great inventions! You won’t be forgotten.

Just two impressive Ritchie cites:

“Unix is simple and coherent, but it takes a genius – or at any rate a programmer – to understand and appreciate the simplicity.”

“The greatest danger to good computer science research today may be excessive relevance. If we can keep alive enough openess to new ideas, enough freedom of communication, enough patience to allow the novel to prosper, it will remain possible for a future Ken Thompson to find a little-used Cray/1 computer and fashion a system as creative, and as influential, as Unix.”

Qt open governance will go live!

Finally some sustainable announcements about the future of Qt and its open governance project:

I hope this will be well received and we will see yet another increase in contributions to our Qt/KDE ecosystem 😉

Thanks for all the effort to all people who made this possible!

Line Modification System

Some days ago, Dominik implemented a line modification system in the KatePart.
For all who don’t know what that means at all (like me before the DS 2011), here some screenshots.

First, starting with a fresh loaded file:

Now, lets write some lines:

Next, after saving:

Now, lets change some stuff again:

Awesome 🙂

First I thought: Why to hell do I need such a feature? But after using it some days now, I think it is really VERY useful.

Yesterday I worked in parallel on code that generates integer linear programs as CPLEX files and read the output files (which are > 100000 lines) to find regressions.
I had to manually tweak the ILP files a bit to reveal the reason of my issues and it was just cool to exactly know even after save, which lines in the ILP I touched.
Normally I would have written some comments like \changed… above my modified lines in the output files, but yeah, KatePart does track such stuff now automatically 😉

Even for the much less big source files, it was nice to see:
Oh, I just tweaked that few C++ lines and it did remove the issue, maybe I should look at the lines below/above of that lines, too, for more possible problems?

Therefor: Thanks to Dominik for this nifty feature, I hope others appreciate it, too!

If you want this feature now: Use the guide at’s Get It!.