How can i just read first 2 lines of the file but not entirely load it to RAM

[jzq740176597]

like noted above,If the file is GB level,i want just 2 first lines data(in bytes).
of course, the line is variable so need to find the 2 \n position.

Despite the performance,the RAM is totally not doable for load the whole file.will crash.

any advice?

[JKSH]

Hi,

You want QFile::readLine(). See http://qt-project.org/doc/qt-5/qfile.html