misc.c

来自「刻录光盘的程序」· C语言 代码 · 共 52 行

/* @(#)misc.c	1.1 98/08/16 Copyright 1998 J. Schilling */
#ifndef lint
static	char sccsid[] =
	"@(#)misc.c	1.1 98/08/16 Copyright 1998 J. Schilling";
#endif
/*
 *	Misc support functions
 *
 *	Copyright (c) 1998 J. Schilling
 */
/*
 * This program 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 2, or (at your option)
 * any later version.
 *
 * This program 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 this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <mconfig.h>
#include <timedefs.h>
#include <standard.h>

EXPORT	void	timevaldiff	__PR((struct timeval *start, struct timeval *stop));

EXPORT void
timevaldiff(start, stop)
	struct timeval	*start;
	struct timeval	*stop;
{
	struct timeval tv;

	tv.tv_sec = stop->tv_sec - start->tv_sec;
	tv.tv_usec = stop->tv_usec - start->tv_usec;
	while (tv.tv_usec > 1000000) {
		tv.tv_usec -= 1000000;
		tv.tv_sec += 1;
	}
	while (tv.tv_usec < 0) {
		tv.tv_usec += 1000000;
		tv.tv_sec -= 1;
	}
	*stop = tv;
}