Are you sure your QByteArray has the correct size? If your constructed it from a const char* and did not give the size, it may contain only data up to the first zero byte.
helmut -----Ursprüngliche Nachricht----- Von: Interest [mailto:interest-bounces+helmut.muelner=gmail....@qt-project.org] Im Auftrag von alexander golks Gesendet: Mittwoch, 9. Mai 2018 11:40 An: interest@qt-project.org Betreff: Re: [Interest] QFile::write(const QByteArray&) does not write all data? Am Wed, 09 May 2018 09:24:58 +0000 schrieb Vadim Peretokin <vpereto...@gmail.com>: yes, i tried flushing the file, too. but this changed nothing. i now have same do while loop as in qint64 QFSFileEnginePrivate::nativeWrite(const char *data, qint64 len) and this works. this writes complete file. but i think, QFile implementation is wrong here. i think nativeWrite should set error and return -1 on every chunk, not only at first chunk. alex > Obvious question but do you flush? > > On Wed, May 9, 2018 at 11:09 AM alexander golks <a...@golks.de> wrote: > > > hi, > > > > i recently stumbled over this situation, running on windows 7 using > > qt-5.6.3. > > when trying to write ~50MB of data, write does not always complete, > > the file does not contain all data, yet no error is returned. > > > > i always thought, QFile::write(const QByteArray&) is meant to write > > all data. > > as stated in the documentation for: qint64 > > QIODevice::writeData(const char *data, qint64 maxSize) "When > > reimplementing this function it is important that this function > > writes all the data available before returning." > > > > is this a bug in QFile? > > or do i have to do-while loop to write the rest of my data? > > but wouldn't this lead missing writes in QDataStream + QFile, as > > QDataStream needs complete writes, too? > > > > alex > > > > -- > > /* > > * Learn to pause -- or nothing worthwhile can catch up to you. > > */ > > _______________________________________________ > > Interest mailing list > > Interest@qt-project.org > > http://lists.qt-project.org/mailman/listinfo/interest > > -- /* * printk("ip6t_hook: happy cracking.\n"); * linux-2.6.6/net/ipv6/netfilter/ip6table_filter.c */ _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
