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/* $OpenBSD: util.c,v 1.8 2004/07/10 22:24:20 alexander 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 MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/time.h>
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#include "ntpd.h"
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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 (tv.tv_sec + JAN_1970 + 1.0e-6 * tv.tv_usec);
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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 = (long)d;
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tv->tv_usec = (d - tv->tv_sec) * 1000000;
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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_part = ntohl(lfp.int_part);
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lfp.fraction = ntohl(lfp.fraction);
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ret = (double)(lfp.int_part) + ((double)lfp.fraction / 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_part = htonl((u_int32_t)d);
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lfp.fraction = 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_part = ntohs(sfp.int_part);
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sfp.fraction = ntohs(sfp.fraction);
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ret = (double)(sfp.int_part) + ((double)sfp.fraction / 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_part = htons((u_int16_t)d);
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sfp.fraction = 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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