Method GetOperandNumber

Common/Misc/vtkFunctionParser.cxx:1774–1860

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

//------------------------------------------------------------------------------
unsigned int vtkFunctionParser::GetOperandNumber(int currentIndex)
{
  int variableIndex = -1;

  if (isdigit(this->Function[currentIndex]) || this->Function[currentIndex] == '.') // Number
  {
    double* tempImmediates = new double[this->ImmediatesSize];
    for (int i = 0; i < this->ImmediatesSize; i++)
    { // Copy current immediates to a temporary array
      tempImmediates[i] = this->Immediates[i];
    }
    delete[] this->Immediates;

    // Allocate space for new immediate value.
    this->Immediates = new double[this->ImmediatesSize + 1];

    // Copy contents of temporary array back to Immediates.
    for (int i = 0; i < this->ImmediatesSize; i++)
    {
      this->Immediates[i] = tempImmediates[i];
    }

    VTK_FROM_CHARS_IF_ERROR_BREAK(
      &this->Function[currentIndex], this->Immediates[this->ImmediatesSize]);
    this->ImmediatesSize++;
    delete[] tempImmediates;
    return VTK_PARSER_IMMEDIATE;
  }

  if (!strncmp(&this->Function[currentIndex], "iHat", 4))
  {
    return VTK_PARSER_IHAT;
  }
  if (!strncmp(&this->Function[currentIndex], "jHat", 4))
  {
    return VTK_PARSER_JHAT;
  }
  if (!strncmp(&this->Function[currentIndex], "kHat", 4))
  {
    return VTK_PARSER_KHAT;
  }

  bool scalarVar = false;
  size_t currentLen = 0;
  // Bug 7396. If a scalar variable name is a subset of a vector var name it will
  // cause the scripting to crash. So instead of ending once we find a var name that matches in
  // scalars we will also check vectors
  for (int i = 0, max = this->GetNumberOfScalarVariables(); i < max; i++)
  { // Variable
    if (strncmp(&this->Function[currentIndex], this->ScalarVariableNames[i].c_str(),
          this->ScalarVariableNames[i].size()) == 0)
    {
      if (variableIndex == -1 || this->ScalarVariableNames[i].size() > currentLen)
      {
        currentLen = this->ScalarVariableNames[i].size();
        variableIndex = i;
      }
    }