#ifndef _OTB_TRISKELE_DEBUG_TPP
#define _OTB_TRISKELE_DEBUG_TPP

string
ns2string (double delta) {
  using namespace boost::chrono;

  ostringstream oss;
  duration<double> ns (delta);
  oss.fill ('0');
  // typedef duration<int, ratio<86400> > days;
  // auto d = duration_cast<days>(ns);
  // ns -= d;
  auto h = duration_cast<hours> (ns);
  ns -= h;
  auto m = duration_cast<minutes> (ns);
  ns -= m;
  oss << setw (2) << h.count () << ":"
      << setw (2) << m.count () << ":"
      << setw (9) << fixed << setprecision (6) << ns.count ();
  return oss.str ();
}

#endif // _OTB_TRISKELE_DEBUG_TPP