Function ProcessorDirName

IO/Parallel/vtkPOpenFOAMReader.cxx:121–145

Generate a processor dirname from number or tuple. For 1 component: procNum -> 'processor ' For 3 component tuple (nprocs, first, size) - processors , when first == size == 0 - processors _ - , where last is inclusive

// - processors<nprocs>, when first == size == 0
// - processors<nprocs>_<first>-<last>, where last is inclusive
std::string ProcessorDirName(const vtkIntArray* dirs, int index)
{
  if (index < 0 || index >= dirs->GetNumberOfTuples())
  {
    return std::string();
  }
  else if (3 == dirs->GetNumberOfComponents())
  {
    // Collated name
    const auto nprocs = dirs->GetTypedComponent(index, 0);
    const auto first = dirs->GetTypedComponent(index, 1);
    const auto size = dirs->GetTypedComponent(index, 2);

    std::string stem("processors" + vtk::to_string(nprocs));
    if (size)
    {
      const auto last = (first + size - 1); // inclusive range
      return (stem + "_" + vtk::to_string(first) + "-" + vtk::to_string(last));
    }
    return stem;
  }

  // Uncollated name
  return std::string("processor" + vtk::to_string(dirs->GetValue(index)));
}

#if VTK_FOAMFILE_COLLATED_FORMAT
// Number of processor pieces represented by the tuple