///////////////////////////////////////////////////////////////
//  timer.cpp  --   determine elapsed time                   //
//  ver 1.0                                                  //
//  Language:       Visual C++, ver 6.0                      //
//  Platform:       Micron Dual Pentium Pro 200, Win NT 4.0  //
//  Application:    Demo for CSE691 Pr4, Fall 1998           //
//  Author:         Jim Fawcett, CST 2-187, Syracuse Univ.   //
//                  (315) 443-3948, fawcett@ecs.syr.edu      //
///////////////////////////////////////////////////////////////

#include "timer.h"

//----< constructor >------------------------------------------

timer::timer() {

  startTime = clock();
  isRunning = true;
  endTime = 0;
}

//----< destructor >-------------------------------------------

timer::~timer() { startTime = endTime = 0; isRunning = false; }

//----< reset timer >------------------------------------------

clock_t timer::start() { 
  
  isRunning = true; 
  return (startTime = clock()); 
}

//----< stop timer clock >-------------------------------------

clock_t timer::stop() { 
  
  isRunning = false;
  return (endTime = clock()); 
}

//----< return elapsed time >----------------------------------

clock_t timer::elapsed() { 
  
  if(isRunning)
    return(clock() - startTime);
  else
    return (endTime - startTime); 
}

//

#ifdef TEST_TIMER

#include <iostream>
#include <windows.h>
using namespace std;

//----< test stub >--------------------------------------------

void main() {

  cout << "\n  Testing Timer Class "
       << "\n =====================\n";

  timer t1, t2, t3;
  cout << "\n  starting t1 at time: " << t1.start()   << '\n';
  Sleep(100);
  cout << "\n  stopping t1 at time: " << t1.stop()    << '\n';
  cout << "\n  t1 elapsed time is:  " << t1.elapsed() << '\n';
  cout << "\n  starting t2 at time: " << t2.start()   << '\n';
  Sleep(1000);
  cout << "\n  t1 elapsed time is:  " << t1.elapsed() 
       << "\n  t2 elapsed time is:  " << t2.elapsed() << '\n';
  cout << "\n  stopping t2 at time: " << t2.stop()    << "\n\n";

}

#endif