time_diff.cpp

/* 
 * This file is part of Filmulator.
 *
 * Copyright 2013 Omer Mano and Carlo Vaccari
 *
 * Filmulator is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Filmulator is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Filmulator. If not, see <http://www.gnu.org/licenses/>
 */
#include <sys/time.h>
#include <cstddef>

double time_diff(struct timeval start)
{
    struct timeval end;
    long seconds, useconds;
    gettimeofday(&end,NULL);
    seconds = end.tv_sec - start.tv_sec;
    useconds = end.tv_usec - start.tv_usec;
    return (seconds + useconds/1000000.0);
}