Method Read

IO/Geometry/vtkOpenFOAMReader.cxx:2255–2600

the tokenizer returns true if success, false if encountered EOF

  // the tokenizer
  // returns true if success, false if encountered EOF
  bool Read(vtkFoamToken& token)
  {
    token.SetStreamOption(this->GetStreamOption());
    const bool use64BitLabels = this->IsLabel64();

    // expanded the outermost loop in nextTokenHead() for performance
    int c;
    while (isspace(c = this->Getc())) // isspace() accepts -1 as EOF
    {
      if (c == '\n')
      {
        ++this->Superclass::LineNumber;
#if VTK_FOAMFILE_RECOGNIZE_LINEHEAD
        this->Superclass::WasNewline = true;
#endif
      }
    }
    if (c == '/')
    {
      this->PutBack(c);
      c = this->NextTokenHead();
    }
#if VTK_FOAMFILE_RECOGNIZE_LINEHEAD
    if (c != '#')
    {
      this->Superclass::WasNewline = false;
    }
#endif

    constexpr int MAXLEN = 1024;
    char buf[MAXLEN + 1];
    int charI = 0;
    switch (c)
    {
      case '(':
      case ')':
        // high-priority punctuation token
        token = static_cast<char>(c);
        return true;
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
      case '0':
      case '-':
        // undetermined number token
        do
        {
          buf[charI++] = static_cast<unsigned char>(c);
        } while (isdigit(c = this->Getc()) && charI < MAXLEN);
        if (c != '.' && c != 'e' && c != 'E' && charI < MAXLEN && c != EOF)
        {
          // label token