QProcess Or KProcess ?

1 month of GSoC is already over and the coding period has officially begun. Here’s a highlight of what I did and what I plan to do for this week

Most of the time of community bonding period was spent giving college exams. By the time my exams got over,  I only had a week left to make something useful of the community bonding period time.

The last week started with a discussion with my mentor , where we decided which API to use to port the back ends.  We had to  decide between QProcess and KProcess. Just a brief of what these APIs do:

QProcess is used to start external programs and to communicate with them. The communication between QProcess and the external program happens through channels. The three standard channels used for communication are
Standard output(stdout): supplies regular console output
Standard error(stderr): supplies the errors that are printed by the process
Standard input(stdin): provides input to the process

KProcess is no different from QProcess. It inherits QProcess and extends it by by some extra and useful functionality

Since a few of the back ends of cantor were already using KProcess, we had to decide whether we actually need KProcess or whether QProcess will suffice our needs. The best  way to  decide this  was to port a back end which makes use of KProcess to QProcess.

Port of Scilab to QProcess

The port process was pretty simple and did not take more than an hour to port and test. The test was performed  on various inputs including plot commands.
You can have a look at the commit that actually does the port
Since Everything worked fine, we decided to move forward with QProcess and use it for other back ends

Plan for this week

The very first back end I have decided to work on is Qalculate. Qalculate at the moment uses libqalculate library for all the calculations.
To get rid of libcalulate, we will be making use of qalc which is the command line interface for Qalculate
This week  I’ll be concentrating on setting up basic communication  between Cantor and  Qalculate using  qalc

Let the hacking begin!


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