crypto/external/bsd/heimdal/dist/lib/roken/timeval.c

   1 /*      $NetBSD: timeval.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $    */
   2
   3 /*
   4  * Copyright (c) 1999 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * Timeval stuff
  38  */
  39
  40 #include <config.h>
  41
  42 #include <krb5/roken.h>
  43
  44 /*
  45  * Make `t1' consistent.
  46  */
  47
  48 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
  49 timevalfix(struct timeval *t1)
  50 {
  51     if (t1->tv_usec < 0) {
  52         t1->tv_sec--;
  53         t1->tv_usec += 1000000;
  54     }
  55     if (t1->tv_usec >= 1000000) {
  56         t1->tv_sec++;
  57         t1->tv_usec -= 1000000;
  58     }
  59 }
  60
  61 /*
  62  * t1 += t2
  63  */
  64
  65 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
  66 timevaladd(struct timeval *t1, const struct timeval *t2)
  67 {
  68     t1->tv_sec  += t2->tv_sec;
  69     t1->tv_usec += t2->tv_usec;
  70     timevalfix(t1);
  71 }
  72
  73 /*
  74  * t1 -= t2
  75  */
  76
  77 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
  78 timevalsub(struct timeval *t1, const struct timeval *t2)
  79 {
  80     t1->tv_sec  -= t2->tv_sec;
  81     t1->tv_usec -= t2->tv_usec;
  82     timevalfix(t1);
  83 }