How can I read strings from a binary file?

[Guerrian]

This is what I have so far:

QFile file;
QString str1, str2;
file.setFileName(file_name);
if (file.open(QIODevice::ReadOnly))
{
    QDataStream data(&file);
    data >> str1;
    data >> str2;
}
file.close();

Will this work or do I have to store the string sizes in the file?

[SGaist]

Hi,

What do you use to write that file ?

[ambershark]

@Guerrian Assuming you wrote it with a QDataStream/QFile as binary then no you will not need the lengths of each string.

Edit: as a side note you could have just compiled your example and tested it faster than writing this question. :D

[Guerrian]

@ambershark Not really, because I would have had two versions of my program each with a load and a save function... too much editing.

[ambershark]

@Guerrian Yea but I literally took your code, added it to a main(), wrote a quick file using QFile as binary, and then read it using your code. Took me < 2 minutes. You didn't have to edit your actual code, you can just create a test app. Even if you were super slow and it took you 20 min to test it, it's still faster than asking a forum. ;)

[Guerrian]

This post is deleted!

[Guerrian]

@ambershark I sussed this out, but it took me a lot longer than 20 minutes. I'm new to Qt and my program had a bug which I had to fix before getting this right. It works like you said. Thanks.

[ambershark]

@Guerrian Yea sorry I didn't factor learning time or bugs into my times. :) Unfortunately while learning everything takes so much longer. But the experience is what makes the memory in the future.