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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"@(#)timeval.c	1.7	09/05/26 SMI"
     28 
     29 #include <time.h>
     30 #include <limits.h>
     31 #include "timeval.h"
     32 #define	MILLION (1000000)
     33 struct timeval
     34 timeval_llong_add(struct timeval *x, long long l)
     35 {
     36 	struct timeval tv;
     37 
     38 	tv.tv_usec = x->tv_usec + (l % MILLION);
     39 	if (tv.tv_usec >= MILLION) {
     40 		tv.tv_sec = 1;
     41 		tv.tv_usec -= MILLION;
     42 	} else {
     43 		tv.tv_sec = 0;
     44 	}
     45 
     46 	tv.tv_sec += x->tv_sec + (l / MILLION);
     47 	if (tv.tv_sec < 0)
     48 		tv.tv_sec = LONG_MAX;
     49 	return (tv);
     50 }
     51 struct timeval
     52 timeval_timeval_sub(struct timeval x, struct timeval y)
     53 {
     54 	struct timeval res;
     55 	if (x.tv_usec < y.tv_usec) {
     56 		x.tv_sec -= 1;
     57 		x.tv_usec += MILLION;
     58 	}
     59 	res.tv_usec = x.tv_usec - y.tv_usec;
     60 	res.tv_sec = x.tv_sec - y.tv_sec;
     61 	if (res.tv_sec < 0)
     62 		res.tv_sec = x.tv_usec = 0;
     63 	return (res);
     64 }
     65 int
     66 timeval_gt(struct timeval x, struct timeval y)
     67 {
     68 	if (x.tv_sec > y.tv_sec)
     69 		return (1);
     70 
     71 	if (x.tv_sec == y.tv_sec && x.tv_usec > y.tv_usec)
     72 		return (1);
     73 	return (0);
     74 }
     75