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/* $OpenBSD: util.c,v 1.21 2016/09/14 08:24:08 reyk Exp $ */
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/*
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* Copyright (c) 2004 Alexander Guy <alexander.guy@andern.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <limits.h>
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#include <stdio.h>
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#include <time.h>
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#include "ntpd.h"
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double
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gettime_corrected(void)
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{
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return (gettime() + getoffset());
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}
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double
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getoffset(void)
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{
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struct timeval tv;
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if (adjtime(NULL, &tv) == -1)
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return (0.0);
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return (tv.tv_sec + 1.0e-6 * tv.tv_usec);
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}
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double
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gettime(void)
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{
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struct timeval tv;
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if (gettimeofday(&tv, NULL) == -1)
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fatal("gettimeofday");
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return (gettime_from_timeval(&tv));
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}
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double
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gettime_from_timeval(struct timeval *tv)
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{
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/*
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* Account for overflow on OSes that have a 32-bit time_t.
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*/
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return ((uint64_t)tv->tv_sec + JAN_1970 + 1.0e-6 * tv->tv_usec);
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}
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time_t
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getmonotime(void)
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{
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struct timespec ts;
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if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
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fatal("clock_gettime");
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return (ts.tv_sec);
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}
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void
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d_to_tv(double d, struct timeval *tv)
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{
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tv->tv_sec = d;
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tv->tv_usec = (d - tv->tv_sec) * 1000000;
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while (tv->tv_usec < 0) {
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tv->tv_usec += 1000000;
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tv->tv_sec -= 1;
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}
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}
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double
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lfp_to_d(struct l_fixedpt lfp)
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{
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double ret;
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lfp.int_partl = ntohl(lfp.int_partl);
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lfp.fractionl = ntohl(lfp.fractionl);
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ret = (double)(lfp.int_partl) + ((double)lfp.fractionl / UINT_MAX);
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return (ret);
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}
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struct l_fixedpt
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d_to_lfp(double d)
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{
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struct l_fixedpt lfp;
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lfp.int_partl = htonl((u_int32_t)d);
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lfp.fractionl = htonl((u_int32_t)((d - (u_int32_t)d) * UINT_MAX));
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return (lfp);
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}
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double
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sfp_to_d(struct s_fixedpt sfp)
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{
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double ret;
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sfp.int_parts = ntohs(sfp.int_parts);
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sfp.fractions = ntohs(sfp.fractions);
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ret = (double)(sfp.int_parts) + ((double)sfp.fractions / USHRT_MAX);
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return (ret);
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}
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struct s_fixedpt
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d_to_sfp(double d)
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{
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struct s_fixedpt sfp;
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sfp.int_parts = htons((u_int16_t)d);
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sfp.fractions = htons((u_int16_t)((d - (u_int16_t)d) * USHRT_MAX));
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return (sfp);
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}
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char *
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print_rtable(int r)
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{
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static char b[11];
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b[0] = 0;
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if (r > 0)
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snprintf(b, sizeof(b), "rtable %d", r);
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return (b);
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}
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const char *
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log_sockaddr(struct sockaddr *sa)
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{
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static char buf[NI_MAXHOST];
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if (getnameinfo(sa, SA_LEN(sa), buf, sizeof(buf), NULL, 0,
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NI_NUMERICHOST))
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return ("(unknown)");
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else
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return (buf);
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}
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