KProcess Line Mode Patch

Thiago Macieira thiago at
Mon Dec 1 14:55:49 GMT 2008

On Monday 01 December 2008 15:36:29 Oswald Buddenhagen wrote:
> i wonder why you preferred to create a patch to KProcess instead of
> trying it via QTextStream as i suggested (and no, it is not my task to
> feed you the solution)? or if you did your homework, why you decided not
> to include the results into the argumentation?

QTextStream (as well as QDataStream) have some issues operating on sequential 
QIODevices. They were made for using on QFile and QBuffer (QByteArray). So 
they don't like when the read() functions return incomplete data.

By the way, that makes me realise yet another problem with the patch:

6) The code returns QStringList instead of QList<QByteArray>. That's 
incorrect, since at this level (QIODevices) we don't know the encoding yet. 
The code should operate on QByteArray only and leave the encoding to the upper 
layer. Right now, it's using the codecForLocale, which often is not what you 

(which QTextStream does for you already, including BOM detection for UTF-16)

Please compile your code with #define QT_NO_CAST_FROM_ASCII and #define 
QT_NO_CAST_TO_ASCII to avoid such issues.

Thiago Macieira - thiago (AT) - thiago (AT)
  Senior Software Engineer - Nokia, Qt Software
  Qt Software is hiring - ask me
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