/***************************************************************************
 * DBS: Distributed Benchmark System
 * Copyright (c) 1995, 1996, 1997 Yukio Murayama
 * Copyright (c) 1995, 1996, 1997 Nara Institute of Science and Technology
 * All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided only with the following
 * conditions are satisfied:
 *
 * 1. Both the copyright notice and this permission notice appear in
 *    all copies of the software, derivative works or modified versions,
 *    and any portions thereof, and that both notices appear in
 *    supporting documentation.
 * 2. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgement:
 *      This product includes software developed by Nara Institute of 
 *      Science and Technology and its contributors.
 * 3. Neither the name of Nara Institute of Science and Technology nor 
 *    the names of its contributors may be used to endorse or promote 
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND NARA 
 * INSTITUTE OF SCIENCE AND TECHNOLOGY DISCLAIMS ANY LIABILITY OF 
 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF 
 * THIS SOFTWARE. ALSO, THERE IS NO WARRANTY IMPLIED OR OTHERWISE, 
 * NOR IS SUPPORT PROVIDED.
 *
 * Feedback of the results generated from any improvements or
 * extensions made to this software would be much appreciated.
 * Any such feedback should be sent to:
 *
 *  Yukio Murayama
 *  E-mail:  <yukio-m@is.aist-nara.ac.jp>
 *  URL:     <http://shika.aist-nara.ac.jp/member/yukio-m/index.html>
 *  Address: Graduate School of Information Science, 
 *           Nara Institute of Science and Technology,
 *           Takayama 8916-5, Ikoma, Nara, Japan
 *
 * Nara Institute of Science and Technology has the rights to 
 * redistribute these changes.
 ***************************************************************************/
/*****************************************************************
 * Distributed Benchmark System
 * DBS Common routines
 * $Revision: 1.8 $
 * $Date: 1997/02/11 03:14:10 $
 * $Author: yukio-m $
 *****************************************************************/

#include <stdio.h>
#include <sys/types.h>
#include <sys/time.h>
#include "dbs.h"

/*
 * timeval to double
 *
 * tp -> double
 */
double timeval2double(tp)
struct timeval *tp;
{
    return (double)tp->tv_sec + (double)tp->tv_usec/1000000.0;
}


/*
 * Timeval Put
 *
 * double -> timeval
 */
void timeval_put(tp, a)
struct timeval *tp;
double a;
{
    tp->tv_sec  = (int)a;
    tp->tv_usec = (int)(a*1000000) % 1000000;
}

/*
 * Timeval Copy
 *
 *  timeval2 -> timeval1
 */
void timeval_cp(tp1, tp2)
struct timeval *tp1, *tp2;
{
    tp1->tv_sec  = tp2->tv_sec;
    tp1->tv_usec = tp2->tv_usec;
}

/*
 * Timeval ADD
 *
 *  timeval1 + timeval2 -> timeval1
 */
void timeval_add(tp1, tp2)
struct timeval *tp1, *tp2;
{
    tp1->tv_sec  += tp2->tv_sec;
    tp1->tv_usec += tp2->tv_usec;
    if (tp1->tv_usec >= 1000000) {
	tp1->tv_sec  += tp1->tv_usec / 1000000;
	tp1->tv_usec %= 1000000;
    }
}

/*
 * Timeval SUB
 *
 *  timeval1 - timeval2 -> timeval1
 */
void timeval_sub(tp1, tp2)
struct timeval *tp1, *tp2;
{
    tp1->tv_sec  -= tp2->tv_sec;
    tp1->tv_usec -= tp2->tv_usec;
    if (tp1->tv_usec < 0) {
	tp1->tv_sec --;
	tp1->tv_usec += 1000000;
    }
}

/*
 * Timeval SUB
 *
 *  timeval + double -> timeval
 */
void timeval_add_double(tp, time)
struct timeval *tp;
double time;
{
    tp->tv_sec  = tp->tv_sec  + (int)time;
    tp->tv_usec = tp->tv_usec + (int)(time*1000000) % 1000000;
    if (tp->tv_usec >= 1000000) {
	tp->tv_sec  += tp->tv_usec / 1000000;
	tp->tv_usec %= 1000000;
    }
}