timer.cpp

#include "timer.h"
/*
  start();  starts the clock running from the current time
  currtime();  returns the current time
  stop();  stops the clock without reseting its value
  reset();  stops the clock and resets the timer to 0
*/

Timer::Timer(){
  starttime_=0;
  isstop_=1;
  stoptime_=0;
}
void Timer::reset(){
  stoptime_=0;
  starttime_=0;
  isstop_=1;
}
void Timer::start(){
  clock_t curr=clock();
  if(isstop_){
    starttime_=(stoptime_==0)?curr:starttime_+(curr-stoptime_);
  }
  else{
    starttime_=curr;   //its like hitting reset and start
  }
}
void Timer::stop(){
  stoptime_=clock();
  isstop_=1;
}
double Timer::currtime(){
  clock_t curr=clock();
  clock_t elapse=(isstop_)?stoptime_-starttime_:curr-starttime_;
  return double(elapse)/CLOCKS_PER_SEC;
}
double Timer::starttime(){
  return (double)starttime_;
}