Am Sun, 13 May 2018 23:50:20 -0700
schrieb Thiago Macieira <thiago.macie...@intel.com>:
> On Sunday, 13 May 2018 23:28:47 PDT alexander golks wrote:
> > > In fact, QDataStream can't recover from any errors.
> >
> > as you've said, my origin problem is no error.
> > wouldn't it be possible for QDataStream to handle this no-errors, too?
>
> It already does.
>
> int QDataStream::writeRawData(const char *s, int len)
> {
> CHECK_STREAM_WRITE_PRECOND(-1)
> int ret = dev->write(s, len);
> if (ret != len)
> q_status = WriteFailed;
> return ret;
> }
it does, partly. the write has not failed, it simply has not written all data.
> > otherwise, as i still don't know the "no-error" conditions, i would always
> > need to use something like QDataStream::writeRawData, which is barely more
> > then a QFile::write, and no other operator<< methods.
>
> it will tell you if there was a write failure. See above.
yes, but all other operator<< methods not.
what about something like:
int QDataStream::writeRawData(const char *s, int len)
{
CHECK_STREAM_WRITE_PRECOND(-1)
qint64 bytesToWrite = len;
qint64 totalWritten = 0;
do {
int ret = dev->write(s + totalWritten, bytesToWrite);
if(ret < 0)
break;
totalWritten += ret;
bytesToWrite -= ret;
} while (totalWritten < len);
if(totalWritten != len)
q_status = WriteFailed;
return totalWritten;
}
and appropriate modifications for all other related methods.
--
/*
* All generalizations are false, including this one.
* -- Mark Twain
*/
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