timestring() [3/3]

std::string libtime::TAbsoluteTime::timestring

(

const std::string &

format

)

const

return string representation of time.

The function takes a format definition and passes it to strftime(3) to receive a formatted time string.

Parameters

format

format string, see strftime(3)

Returns

time string in requested format

Definition at line 49 of file formatted_timestring.cc.

References day(), doy(), libtime::TBaseClassTime::hour(), libtime_assert, libtime::TBaseClassTime::minute(), month(), libtime::TBaseClassTime::second(), and year().

Referenced by Ainit_from_value(), and main().

  {
    const int incr=20;
    const int nstart=format.length()+incr;
    int n=nstart;
    bool success=false;
    struct std::tm timetm;
    timetm.tm_year=this->year()-1900;
    timetm.tm_mon=this->month()-1;
    timetm.tm_mday=this->day();
    timetm.tm_yday=this->doy();
    timetm.tm_hour=this->hour();
    timetm.tm_min=this->minute();
    timetm.tm_sec=this->second();
    timetm.tm_isdst=0;
    timetm.tm_wday=0;
    std::string retval;
    while (!success)
    {
      char* ts=new char[n];
      size_t nret=std::strftime(ts, n, format.c_str(), &timetm);
      retval=std::string(ts);
      delete[] ts;
      if ((nret<(n-1))&&(nret>0))
      {
        success=true;
      }
      else
      {
        n+=incr;
        libtime_assert(n<1000,
                       "ERROR TAbsoluteTime::timestring(): "
                       "time string is unreasonably long");
      }
    }
    return retval;
  }

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