/* Subtract two struct timespec values.
- Copyright (C) 2011-2013 Free Software Foundation, Inc.
+ Copyright (C) 2011-2014 Free Software Foundation, Inc.
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
/* Written by Paul Eggert. */
/* Return the difference between two timespec values A and B. On
- overflow, return an extremal value. This assumes 0 <= tv_nsec <=
- 999999999. */
+ overflow, return an extremal value. This assumes 0 <= tv_nsec <
+ TIMESPEC_RESOLUTION. */
#include <config.h>
#include "timespec.h"
struct timespec
timespec_sub (struct timespec a, struct timespec b)
{
- struct timespec r;
time_t rs = a.tv_sec;
time_t bs = b.tv_sec;
int ns = a.tv_nsec - b.tv_nsec;
if (ns < 0)
{
- rns = ns + 1000000000;
+ rns = ns + TIMESPEC_RESOLUTION;
if (rs == TYPE_MINIMUM (time_t))
{
if (bs <= 0)
else
{
rs = TYPE_MAXIMUM (time_t);
- rns = 999999999;
+ rns = TIMESPEC_RESOLUTION - 1;
}
}
else
rs -= bs;
- r.tv_sec = rs;
- r.tv_nsec = rns;
- return r;
+ return make_timespec (rs, rns);
}