/contrib/ntp/libparse/gpstolfp.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 76 lines · 19 code · 4 blank · 53 comment · 1 complexity · 98ade79dd69ba910fb91c28545eb60d4 MD5 · raw file
- /*
- * /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
- */