select() [2/2]

bool datrw::sequentialtracereader::select	(	const std::string &	filename,
		const int &	itrace,
		const std::string &	format
	)

Definition at line 67 of file tracereader.cc.

References DATRW_assert, Mdebug, Mfilename, Mindex, Mopen, MPias, and MPis.

  {
    if (Mdebug)
    {
      std::cerr << "DEBUG: sequentialtracereader: "
        << "entered select with parameters:" << std::endl
        << "  filename: " << filename << std::endl
        << "  itrace: " << itrace << std::endl
        << "  format: " << format << std::endl;
      if (Mopen)
      {
        std::cerr << "  current filename: " << Mfilename << std::endl
          << "  current trace: " << Mindex << std::endl;
      }
    }
    bool doopen=false;
    // check: must a new file be opened?
    if (!Mopen) 
    {
      doopen=true;
      if (Mdebug)
      {
        std::cerr << "DEBUG: sequentialtracereader: "
          << "open file, because no file is open" << std::endl;
      }
    }
    else
    {
      if (filename != Mfilename) 
      { 
        doopen=true; 
        if (Mdebug)
        {
          std::cerr << "DEBUG: sequentialtracereader: "
            << "open file, because file name differs" << std::endl;
        }
      }
      else if (itrace < Mindex) 
      { 
        doopen=true; 
        if (Mdebug)
        {
          std::cerr << "DEBUG: sequentialtracereader: "
            << "open file, because trace index (" << itrace << ") "
            << "is less than current index (" << Mindex << ")" << std::endl;
        }
      }
    }
    // if yes: open new file
    if (doopen)
    {
      if (this->Mopen)
      { 
        if (Mdebug)
        {
          std::cerr << "DEBUG: sequentialtracereader: "
            << "close previous file" << std::endl;
        }
        delete MPis;
        delete MPias;
      } 
      Mindex=1;
      Mfilename=filename;
      MPis=new std::ifstream(Mfilename.c_str(),
                             datrw::ianystream::openmode(format));
      MPias=new datrw::ianystream(*MPis, format, Mdebug);
      Mopen=true;
      if (Mdebug)
      {
        std::cerr << "DEBUG: sequentialtracereader: "
          << "file " << Mfilename << " is opened" << std::endl;
      }
    }
    // skip to selected trace
    int nskip=itrace-Mindex;
    DATRW_assert(nskip>=0, "sequentialtracereader::select: "
                   "cannot skip backwards!");
    if (Mdebug)
    {
      std::cerr << "DEBUG: sequentialtracereader: "
        << nskip << " skips: " << std::endl;
    }
    for (int iskip=0; iskip<nskip; ++iskip)
    {
      DATRW_assert(MPias->good(), "sequentialtracereader::select: "
                     "input is not good!");
      MPias->skipseries();
      ++Mindex;
    }
    return(MPias->good());
  } // sequentialtracereader::select