Binary incompatibility issue in JuK saved data

Thiago Macieira thiago at
Tue Jan 8 12:01:41 GMT 2008

On Tuesday 08 January 2008 11:33:43 Will Stephenson wrote:
> On Tuesday 08 January 2008, Jaroslaw Staniek said:
> > Just a note, not necessary for JuK itself;
> > Isn't this a lesson for other projects saving to binary formats that it
> > would be safer to eventually migrate to a structured platform independent
> > storage like SQLite? (which is now the building block of KDE 4 anyway -
> > in strigi, akonadi, koffice, amarok, to name a few).
> QDataStream is version independent if you use setVersion.  I assume it's
> platform independent too, can someone who knows the truth here confirm
> that?

It is.

It's one of the reasons why the operators << and >> for long were dropped in 
Qt4 -- long itself isn't cross-platform. You have to explicitly cast to int 
or qlonglong.

There was a header in DCOP/Qt4 before it was removed that added the operator.

> Not to put down database storage, our database support is excellent, but
> for many uses it's using a hammer to crack a nut, and given the way people
> are taught computing these days, some will be tempted to go for what they
> know and use a database where a simple binary format is good enough and
> performs better than loading a database library and a db file and
> initialising the database and doing a query.

  Thiago Macieira  -  thiago (AT) - thiago (AT)
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