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/* $OpenBSD: util.c,v 1.13 2007/03/27 18:22:02 otto Exp $ */
/*
* Copyright (c) 2004 Alexander Guy <alexander.guy@andern.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/time.h>
#include <limits.h>
#include "ntpd.h"
double
gettime_corrected(void)
{
return (gettime() + getoffset());
}
double
getoffset(void)
{
struct timeval tv;
if (adjtime(NULL, &tv) == -1)
return (0.0);
return (tv.tv_sec + 1.0e-6 * tv.tv_usec);
}
double
gettime(void)
{
struct timeval tv;
if (gettimeofday(&tv, NULL) == -1)
fatal("gettimeofday");
return (tv.tv_sec + JAN_1970 + 1.0e-6 * tv.tv_usec);
}
time_t
getmonotime(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
fatal("clock_gettime");
return (ts.tv_sec);
}
void
d_to_tv(double d, struct timeval *tv)
{
tv->tv_sec = (long)d;
tv->tv_usec = (d - tv->tv_sec) * 1000000;
while (tv->tv_usec < 0) {
tv->tv_usec += 1000000;
tv->tv_sec -= 1;
}
}
double
lfp_to_d(struct l_fixedpt lfp)
{
double ret;
lfp.int_partl = ntohl(lfp.int_partl);
lfp.fractionl = ntohl(lfp.fractionl);
ret = (double)(lfp.int_partl) + ((double)lfp.fractionl / UINT_MAX);
return (ret);
}
struct l_fixedpt
d_to_lfp(double d)
{
struct l_fixedpt lfp;
lfp.int_partl = htonl((u_int32_t)d);
lfp.fractionl = htonl((u_int32_t)((d - (u_int32_t)d) * UINT_MAX));
return (lfp);
}
double
sfp_to_d(struct s_fixedpt sfp)
{
double ret;
sfp.int_parts = ntohs(sfp.int_parts);
sfp.fractions = ntohs(sfp.fractions);
ret = (double)(sfp.int_parts) + ((double)sfp.fractions / USHRT_MAX);
return (ret);
}
struct s_fixedpt
d_to_sfp(double d)
{
struct s_fixedpt sfp;
sfp.int_parts = htons((u_int16_t)d);
sfp.fractions = htons((u_int16_t)((d - (u_int16_t)d) * USHRT_MAX));
return (sfp);
}
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