Method ReadCompactLabelListList

IO/Geometry/vtkOpenFOAMReader.cxx:3984–4052

Read compact labelListList which has offsets and data

// Read compact labelListList which has offsets and data
void vtkFoamEntryValue::ReadCompactLabelListList(vtkFoamIOobject& io)
{
  if (io.IsAsciiFormat())
  {
    this->ReadLabelListList(io);
    return;
  }

  this->SetStreamOption(io);
  const bool use64BitLabels = io.IsLabel64();

  this->LabelListListPtr = vtkCellArray::New();
  if (use64BitLabels)
  {
    this->LabelListListPtr->Use64BitStorage();
  }
  else
  {
    this->LabelListListPtr->Use32BitStorage();
  }
  this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
  for (int arrayI = 0; arrayI < 2; arrayI++)
  {
    vtkFoamToken currToken;
    currToken.SetStreamOption(io);
    if (!io.Read(currToken))
    {
      throw vtkFoamError() << "Unexpected EOF";
    }
    if (currToken.IsLabel())
    {
      vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
      if (listLen < 0)
      {
        throw vtkFoamError() << "Illegal negative list length: " << listLen;
      }

      vtkDataArray* array =
        (arrayI == 0 ? this->Superclass::LabelListListPtr->GetOffsetsArray()
                     : this->Superclass::LabelListListPtr->GetConnectivityArray());
      array->SetNumberOfValues(static_cast<vtkIdType>(listLen));

      if (listLen > 0)
      {
        // Non-empty (binary) list - only read parentheses only when size > 0

        io.ReadExpecting('('); // Begin list
        if (use64BitLabels)
        {
          io.Read(reinterpret_cast<unsigned char*>(
                    vtkAOSDataArrayTemplate<vtkTypeInt64>::FastDownCast(array)->GetPointer(0)),
            static_cast<vtkTypeInt64>(listLen * array->GetDataTypeSize()));
        }
        else
        {
          io.Read(reinterpret_cast<unsigned char*>(
                    vtkAOSDataArrayTemplate<vtkTypeInt32>::FastDownCast(array)->GetPointer(0)),
            static_cast<vtkTypeInt64>(listLen * array->GetDataTypeSize()));