Annotation of embedaddon/ntp/libparse/gpstolfp.c, revision 1.1
1.1 ! misho 1: /*
! 2: * /src/NTP/ntp4-dev/libntp/gpstolfp.c,v 4.8 2005/04/16 17:32:10 kardel RELEASE_20050508_A
! 3: *
! 4: * gpstolfp.c,v 4.8 2005/04/16 17:32:10 kardel RELEASE_20050508_A
! 5: *
! 6: * $Created: Sun Jun 28 16:30:38 1998 $
! 7: *
! 8: * Copyright (c) 1998-2005 by Frank Kardel <kardel <AT> ntp.org>
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. Neither the name of the author nor the names of its contributors
! 19: * may be used to endorse or promote products derived from this software
! 20: * without specific prior written permission.
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 25: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 32: * SUCH DAMAGE.
! 33: *
! 34: */
! 35: #include "ntp_fp.h"
! 36:
! 37: #define GPSORIGIN 2524953600UL /* NTP origin - GPS origin in seconds */
! 38: #define SECSPERWEEK (unsigned)(604800) /* seconds per week - GPS tells us about weeks */
! 39: #define GPSWRAP 990 /* assume week count less than this in the previous epoch */
! 40:
! 41: void
! 42: gpstolfp(
! 43: int weeks,
! 44: int days,
! 45: unsigned long seconds,
! 46: l_fp * lfp
! 47: )
! 48: {
! 49: if (weeks < GPSWRAP)
! 50: {
! 51: weeks += 1024;
! 52: }
! 53:
! 54: lfp->l_ui = weeks * SECSPERWEEK + days * 86400 + seconds + GPSORIGIN; /* convert to NTP time */
! 55: lfp->l_uf = 0;
! 56: }
! 57:
! 58: /*
! 59: * History:
! 60: *
! 61: * gpstolfp.c,v
! 62: * Revision 4.8 2005/04/16 17:32:10 kardel
! 63: * update copyright
! 64: *
! 65: * Revision 4.7 2004/11/14 15:29:41 kardel
! 66: * support PPSAPI, upgrade Copyright to Berkeley style
! 67: *
! 68: * Revision 4.3 1999/02/28 11:42:44 kardel
! 69: * (GPSWRAP): update GPS rollover to 990 weeks
! 70: *
! 71: * Revision 4.2 1998/07/11 10:05:25 kardel
! 72: * Release 4.0.73d reconcilation
! 73: *
! 74: * Revision 4.1 1998/06/28 16:47:15 kardel
! 75: * added gpstolfp() function
! 76: */
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