Method WriteHeader

IO/XML/vtkXMLStructuredDataWriter.cxx:265–346

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//------------------------------------------------------------------------------
int vtkXMLStructuredDataWriter::WriteHeader()
{
  vtkIndent indent = vtkIndent().GetNextIndent();

  ostream& os = *(this->Stream);

  if (!this->WritePrimaryElement(os, indent))
  {
    return 0;
  }

  this->WriteFieldData(indent.GetNextIndent());

  if (this->DataMode == vtkXMLWriter::Appended)
  {
    int begin = this->WritePiece;
    int end = this->WritePiece + 1;
    if (this->WritePiece < 0)
    {
      begin = 0;
      end = this->NumberOfPieces;
    }
    vtkIndent nextIndent = indent.GetNextIndent();

    this->AllocatePositionArrays();

    // Loop over each piece and write its structure.
    for (int i = begin; i < end; ++i)
    {
      // Update the piece's extent.

      os << nextIndent << "<Piece";
      // We allocate 66 characters because that is as big as 6 integers
      // with spaces can get.
      this->ExtentPositions[i] = this->ReserveAttributeSpace("Extent", 66);
      os << ">\n";

      if (this->ErrorCode == vtkErrorCode::OutOfDiskSpaceError)
      {
        this->DeletePositionArrays();
        return 0;
      }

      this->WriteAppendedPiece(i, nextIndent.GetNextIndent());

      if (this->ErrorCode == vtkErrorCode::OutOfDiskSpaceError)
      {
        this->DeletePositionArrays();
        return 0;
      }
      // Close the piece's element.
      os << nextIndent << "</Piece>\n";
    }

    // Close the primary element.
    os << indent << "</" << this->GetDataSetName() << ">\n";

    os.flush();