Method CharacterizeFile

IO/Legacy/vtkDataReader.cxx:3521–3557

------------------------------------------------------------------------------ read entire file, storing important characteristics

//------------------------------------------------------------------------------
// read entire file, storing important characteristics
int vtkDataReader::CharacterizeFile()
{
  if (this->CharacteristicsTime > this->MTime)
  {
    return 1;
  }

  this->InitializeCharacteristics();
  this->CharacteristicsTime.Modified();

  // Open the file
  if (!this->OpenVTKFile() || !this->ReadHeader())
  {
    this->CloseVTKFile();
    return 0;
  }

  char line[256];
  while (this->ReadLine(line))
  {
    this->CheckFor("scalars", line, this->NumberOfScalarsInFile, this->ScalarsNameInFile,
      this->ScalarsNameAllocSize);
    this->CheckFor("vectors", line, this->NumberOfVectorsInFile, this->VectorsNameInFile,
      this->VectorsNameAllocSize);
    this->CheckFor("tensors", line, this->NumberOfTensorsInFile, this->TensorsNameInFile,
      this->TensorsNameAllocSize);
    this->CheckFor("normals", line, this->NumberOfNormalsInFile, this->NormalsNameInFile,
      this->NormalsNameAllocSize);
    this->CheckFor("tcoords", line, this->NumberOfTCoordsInFile, this->TCoordsNameInFile,
      this->TCoordsNameAllocSize);
    this->CheckFor("field", line, this->NumberOfFieldDataInFile, this->FieldDataNameInFile,
      this->FieldDataNameAllocSize);
  }

  this->CloseVTKFile();
  return 1;
}

//------------------------------------------------------------------------------
void vtkDataReader::CheckFor(const char* name, char* line, int& num, char**& array, int& allocSize)