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