QSettings write and read function

[wysota]

I don't see your point. You can encrypt data regardless of the format it is in.

bool writeFile(QIODevice &device, const QSettings::SettingsMap &map) {
    QBuffer buffer;
    buffer.open(QIODevice::WriteOnly);
    QDataStream stream(&buffer);
    device << map;
    QByteArray encrypted = encrypt(buffer.data());
    device.write(encrypted);
    return true;
}

bool writeFile(QIODevice &device, const QSettings::SettingsMap &map) {
    QBuffer buffer;
    buffer.open(QIODevice::WriteOnly);
    QDataStream stream(&buffer);
    device << map;
    QByteArray encrypted = encrypt(buffer.data());
    device.write(encrypted);
    return true;
}

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