QByteArray can not support unsigned char?

[olosie]

I want read binary file and load data to unsigned char array. My code is:

QFile f("a.a");
f.open(QFile::ReadOnly);
QByteArray d = f.readAll();
f.close();

QFile f("a.a");
f.open(QFile::ReadOnly);
QByteArray d = f.readAll();
f.close();

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Functions from QFile and QByteArray support only signed char not unsigned char. I can not understand reason for using signed char because for me byte=unsigned char.
Is there any possibility to read unsigned char from file? Of course I can convert every signed char to unsigned char but mayby exsist easier way for this problem?