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simple_timer.h
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simple_timer.h
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#include <time.h> // time(), ctime(), difftime(), struct tm
#include <stdio.h> // sprintf
class Timer
{
private:
time_t t_start, t_stop, t_elapse;
struct tm * t_report;
char t_buffer[80];
public:
Timer();
~Timer();
char * start();
char * stop();
char * report();
};
Timer::Timer()
{
t_start = time(NULL);
}
Timer::~Timer()
{
}
char * Timer::start()
{
t_start = time(NULL);
sprintf(t_buffer, "Starting time: %s", ctime(&t_start));
return t_buffer;
}
char * Timer::stop()
{
t_stop = time(NULL);
sprintf(t_buffer, "Stopping time: %s", ctime(&t_stop));
return t_buffer;
}
// report elapsed time in readable format
// limitation: days are counted within one year only...
// timezone used to compensate local time zone different.
char * Timer::report()
{
t_elapse = (time_t)difftime(t_stop, t_start); // + timezone if use localtime
t_report = gmtime(&t_elapse); // based on UTC 00:00:00 1/1/1970
sprintf(t_buffer, "Elapsed time: %d day(s), %d hour(s), %d min(s), %d sec(s).\n",
t_report->tm_yday,
t_report->tm_hour,
t_report->tm_min,
t_report->tm_sec);
return t_buffer;
}