77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
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/*
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* /src/NTP/ntp4-dev/libntp/gpstolfp.c,v 4.8 2005/04/16 17:32:10 kardel RELEASE_20050508_A
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*
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* gpstolfp.c,v 4.8 2005/04/16 17:32:10 kardel RELEASE_20050508_A
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*
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* $Created: Sun Jun 28 16:30:38 1998 $
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*
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* Copyright (c) 1998-2005 by Frank Kardel <kardel <AT> ntp.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "ntp_fp.h"
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#define GPSORIGIN ULONG_CONST(2524953600) /* NTP origin - GPS origin in seconds */
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#define SECSPERWEEK (unsigned)(604800) /* seconds per week - GPS tells us about weeks */
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#define GPSWRAP 990 /* assume week count less than this in the previous epoch */
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void
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gpstolfp(
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int weeks,
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int days,
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unsigned long seconds,
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l_fp * lfp
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)
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{
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if (weeks < GPSWRAP)
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{
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weeks += 1024;
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}
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lfp->l_ui = weeks * SECSPERWEEK + days * 86400 + seconds + GPSORIGIN; /* convert to NTP time */
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lfp->l_uf = 0;
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}
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/*
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* History:
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*
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* gpstolfp.c,v
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* Revision 4.8 2005/04/16 17:32:10 kardel
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* update copyright
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*
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* Revision 4.7 2004/11/14 15:29:41 kardel
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* support PPSAPI, upgrade Copyright to Berkeley style
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*
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* Revision 4.3 1999/02/28 11:42:44 kardel
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* (GPSWRAP): update GPS rollover to 990 weeks
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*
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* Revision 4.2 1998/07/11 10:05:25 kardel
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* Release 4.0.73d reconcilation
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*
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* Revision 4.1 1998/06/28 16:47:15 kardel
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* added gpstolfp() function
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*/
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