Serializing and deserializing a QByteArrayList to/from a QDataStream

qbytearraylist-serialization.cpp

#include <QByteArray>
#include <QByteArrayList>
#include <QDataStream>
#include <QDebug>
#include <QFile>
#include <cstring>

int main(int argc, char *argv[]) {
  if (argc != 2) {
    return 1;
  }
  QFile f("foo.bin");
  f.open(QIODevice::ReadWrite);
  QDataStream s(&f);
  if (::strcmp(argv[1], "read") == 0) {
    QByteArrayList y;
    s >> y;
    qDebug() << y;
  } else if (::strcmp(argv[1], "write") == 0) {
    auto x = QByteArrayList{{"\xaa\x55", 2}, {"\xcf", 1}, {"\x00\xff\x80", 3}};
    s << x;
  } else {
    return 1;
  }
  return 0;
}