time_util.h

#ifndef _TIME_UTIL_H_
#define _TIME_UTIL_H_

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include <string.h>
#include <string>
#include <iostream>

#define TIME_MAXSIZE 100

class TIME {
 public:
  TIME() {
    GetCurrTime();
  }

  ~TIME() {}

  TIME(int sec, int usec) {
    d_time.tv_sec = sec;
    d_time.tv_usec = usec;
  }

  TIME(const TIME &other) {
    d_time = other.d_time;
    strncpy(d_timestamp, other.d_timestamp, TIME_MAXSIZE);
  }

  void GetCurrTime() {
    gettimeofday(&d_time, NULL);
  }

  char* CvtCurrTime(); //Return the readable time format in string

  /*Calculate time duration in us*/
  friend double operator-(TIME end, TIME start) {
    double interval = ((end.d_time.tv_sec - start.d_time.tv_sec)*1000000.0 + (end.d_time.tv_usec - start.d_time.tv_usec));
    return interval;
  }

 private:
  struct timeval d_time; /*Current time*/
  char d_timestamp[TIME_MAXSIZE];
};

#endif