Method Initialize

IO/Parallel/vtkMultiBlockPLOT3DReaderInternals.cxx:394–489

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool vtkMultiBlockPLOT3DReaderRecord::Initialize(FILE* fp, vtkTypeUInt64 offset,
  const vtkMultiBlockPLOT3DReaderInternals::InternalSettings& settings,
  vtkMultiProcessController* controller)
{
  this->SubRecords.clear();
  if (!settings.BinaryFile || !settings.HasByteCount)
  {
    return true;
  }
  const int rank = controller ? controller->GetLocalProcessId() : 0;
  int error = 0;
  if (rank == 0)
  {
    vtkTypeUInt64 pos = vtk_ftell(fp);
    unsigned int leadingLengthField;
    int signBit = 0;
    try
    {
      do
      {
        vtkSubRecord subrecord;
        subrecord.HeaderOffset = offset;
        vtkTypeUInt64 dataOffset = subrecord.HeaderOffset + sizeof(int);
        vtk_fseek(fp, offset, SEEK_SET);
        if (fread(&leadingLengthField, sizeof(unsigned int), 1, fp) != 1)
        {
          throw Plot3DException();
        }
        if (settings.ByteOrder == vtkMultiBlockPLOT3DReader::FILE_LITTLE_ENDIAN)
        {
          vtkByteSwap::Swap4LE(&leadingLengthField);
        }
        else
        {
          vtkByteSwap::Swap4BE(&leadingLengthField);
        }
        signBit = (0x80000000 & leadingLengthField) ? 1 : 0;
        if (signBit)
        {
          unsigned int length = 0xffffffff ^ (leadingLengthField - 1);
          subrecord.FooterOffset = dataOffset + length;
        }
        else
        {
          subrecord.FooterOffset = dataOffset + leadingLengthField;
        }
        this->SubRecords.push_back(subrecord);
        offset = subrecord.FooterOffset + sizeof(int);
      } while (signBit == 1);
    }
    catch (Plot3DException&)
    {
      error = 1;
    }
    vtk_fseek(fp, pos, SEEK_SET);
  }

  if (controller == nullptr)