Method ReadPVTKFileInformation

IO/Parallel/vtkPDataSetReader.cxx:429–631

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//------------------------------------------------------------------------------
void vtkPDataSetReader::ReadPVTKFileInformation(
  istream* file, vtkInformation*, vtkInformationVector**, vtkInformationVector* outputVector)
{
  char* block;
  char* param;
  char* val;
  int type;
  int ext[6];
  double vect[3];
  int i;
  char *pfn, *pdir;
  int count, dirLength;
  char dir[512];

  vtkInformation* info = outputVector->GetInformationObject(0);

  // The file block should have a version parameter.
  type = this->ReadXML(file, &block, &param, &val);
  if (type != 2 || strcmp(param, "version") != 0)
  {
    vtkErrorMacro("Could not find file version.");
    return;
  }
  if (strcmp(val, "pvtk-1.0") != 0)
  {
    vtkDebugMacro("Unexpected Version.");
  }

  // Extract the directory form the filename so we can complete relative paths.
  count = dirLength = 0;
  pfn = this->FileName;
  pdir = dir;
  // Copy filename to dir, and keep track of the last slash.
  while (*pfn != '\0' && count < 512)
  {
    *pdir++ = *pfn++;
    ++count;
    if (*pfn == '/' || *pfn == '\\')
    {
      // The extra +1 is to keep the last slash.
      dirLength = count + 1;
    }
  }
  // This trims off every thing after the last slash.
  dir[dirLength] = '\0';

  // We are in the start file block.
  // Read parameters until we terminate the start block.
  while ((type = this->ReadXML(file, &block, &param, &val)) != 3)
  {
    if (type == 0)
    {
      vtkErrorMacro("Early termination of pvtk file.");
      return;
    }
    if (type != 2)
    { // There should be no other possibility. Param will not be nullptr.
      vtkErrorMacro("Expecting a parameter.");