Method open

IO/Geometry/vtkTecplotReader.cxx:78–108

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//------------------------------------------------------------------------------
bool FileStreamReader::open(const char* fileName)
{
  if (!this->Open)
  {
    this->FileName = std::string(fileName);
    // zlib handles both compressed and uncompressed file
    // we just have peak into the file and see if it has the magic
    // flags or not
    unsigned char magic[2];
    FILE* ff = vtksys::SystemTools::Fopen(fileName, "rb");
    size_t count = fread(magic, 1, 2, ff);
    fclose(ff);

    // only continue if fread succeeded
    if (count == 2)
    {
      const char* mode = (magic[0] == 0x1f && magic[1] == 0x8b) ? "rb" : "r";
#if defined(_WIN32)
      std::wstring fileNameWide = vtksys::Encoding::ToWide(fileName);
      this->file = gzopen_w(fileNameWide.c_str(), mode);
#else
      this->file = gzopen(fileName, mode);
#endif

      this->Eof = (this->file == nullptr);
      this->Open = (this->file != nullptr);
      this->Pos = BUFF_SIZE;
    }
  }
  return this->Open;
}
//------------------------------------------------------------------------------
int FileStreamReader::get()
{