882 lines
19 KiB
C
882 lines
19 KiB
C
/*
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* This software was developed by the Software and Component Technologies
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* group of Trimble Navigation, Ltd.
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*
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* Copyright (c) 1997, 1998, 1999, 2000 Trimble Navigation Ltd.
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* All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Trimble Navigation, Ltd.
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* 4. The name of Trimble Navigation Ltd. may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TRIMBLE NAVIGATION LTD. ``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 TRIMBLE NAVIGATION LTD. 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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* refclock_palisade - clock driver for the Trimble Palisade GPS
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* timing receiver
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*
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* For detailed information on this program, please refer to the html
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* Refclock 29 page accompanying the NTP distribution.
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*
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* for questions / bugs / comments, contact:
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* sven_dietrich@trimble.com
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*
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* Sven-Thorsten Dietrich
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* 645 North Mary Avenue
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* Post Office Box 3642
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* Sunnyvale, CA 94088-3642
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*
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* Version 2.45; July 14, 1999
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#if defined(REFCLOCK) && (defined(PALISADE) || defined(CLOCK_PALISADE))
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#include "refclock_palisade.h"
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/* Table to get from month to day of the year */
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const int days_of_year [12] = {
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
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};
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#ifdef DEBUG
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const char * Tracking_Status[15][15] = {
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{ "Doing Fixes\0" }, { "Good 1SV\0" }, { "Approx. 1SV\0" },
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{"Need Time\0" }, { "Need INIT\0" }, { "PDOP too High\0" },
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{ "Bad 1SV\0" }, { "0SV Usable\0" }, { "1SV Usable\0" },
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{ "2SV Usable\0" }, { "3SV Usable\0" }, { "No Integrity\0" },
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{ "Diff Corr\0" }, { "Overdet Clock\0" }, { "Invalid\0" } };
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#endif
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/*
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* Transfer vector
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*/
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struct refclock refclock_palisade = {
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palisade_start, /* start up driver */
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palisade_shutdown, /* shut down driver */
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palisade_poll, /* transmit poll message */
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noentry, /* not used */
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noentry, /* initialize driver (not used) */
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noentry, /* not used */
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NOFLAGS /* not used */
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};
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int day_of_year P((char *dt));
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/*
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* palisade_start - open the devices and initialize data for processing
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*/
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static int
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palisade_start (
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#ifdef PALISADE
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unit, peer
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)
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int unit;
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struct peer *peer;
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#else /* ANSI */
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int unit,
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struct peer *peer
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)
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#endif
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{
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struct palisade_unit *up;
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struct refclockproc *pp;
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int fd;
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char gpsdev[20];
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struct termios tio;
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#ifdef SYS_WINNT
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(void) sprintf(gpsdev, "COM%d:", unit);
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#else
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(void) sprintf(gpsdev, DEVICE, unit);
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#endif
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/*
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* Open serial port.
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*/
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#if defined PALISADE
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fd = open(gpsdev, O_RDWR
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#ifdef O_NONBLOCK
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| O_NONBLOCK
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#endif
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);
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#else /* NTP 4.x */
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fd = refclock_open(gpsdev, SPEED232, LDISC_RAW);
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#endif
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if (fd <= 0) {
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#ifdef DEBUG
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printf("Palisade(%d) start: open %s failed\n", unit, gpsdev);
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#endif
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return 0;
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}
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msyslog(LOG_NOTICE, "Palisade(%d) fd: %d dev: %s", unit, fd,
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gpsdev);
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#if defined PALISADE
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tio.c_cflag = (CS8|CLOCAL|CREAD|PARENB|PARODD);
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tio.c_iflag = (IGNBRK);
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tio.c_oflag = (0);
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tio.c_lflag = (0);
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if (cfsetispeed(&tio, SPEED232) == -1) {
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msyslog(LOG_ERR,"Palisade(%d) cfsetispeed(fd, &tio): %m",unit);
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#ifdef DEBUG
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printf("Palisade(%d) cfsetispeed(fd, &tio)\n",unit);
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#endif
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return 0;
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}
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if (cfsetospeed(&tio, SPEED232) == -1) {
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#ifdef DEBUG
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printf("Palisade(%d) cfsetospeed(fd, &tio)\n",unit);
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#endif
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msyslog(LOG_ERR,"Palisade(%d) cfsetospeed(fd, &tio): %m",unit);
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return 0;
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}
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#else /* NTP 4.x */
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if (tcgetattr(fd, &tio) < 0) {
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msyslog(LOG_ERR,
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"Palisade(%d) tcgetattr(fd, &tio): %m",unit);
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#ifdef DEBUG
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printf("Palisade(%d) tcgetattr(fd, &tio)\n",unit);
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#endif
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return (0);
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}
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tio.c_cflag |= (PARENB|PARODD);
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tio.c_iflag &= ~ICRNL;
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#endif /* NTP 4.x */
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if (tcsetattr(fd, TCSANOW, &tio) == -1) {
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msyslog(LOG_ERR, "Palisade(%d) tcsetattr(fd, &tio): %m",unit);
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#ifdef DEBUG
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printf("Palisade(%d) tcsetattr(fd, &tio)\n",unit);
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#endif
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return 0;
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}
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/*
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* Allocate and initialize unit structure
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*/
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up = (struct palisade_unit *) emalloc(sizeof(struct palisade_unit));
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if (!(up)) {
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msyslog(LOG_ERR, "Palisade(%d) emalloc: %m",unit);
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#ifdef DEBUG
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printf("Palisade(%d) emalloc\n",unit);
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#endif
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(void) close(fd);
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return (0);
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}
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memset((char *)up, 0, sizeof(struct palisade_unit));
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pp = peer->procptr;
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pp->io.clock_recv = palisade_io;
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pp->io.srcclock = (caddr_t)peer;
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pp->io.datalen = 0;
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pp->io.fd = fd;
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if (!io_addclock(&pp->io)) {
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#ifdef DEBUG
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printf("Palisade(%d) io_addclock\n",unit);
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#endif
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(void) close(fd);
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free(up);
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return (0);
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}
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/*
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* Initialize miscellaneous variables
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*/
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pp->unitptr = (caddr_t)up;
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pp->clockdesc = DESCRIPTION;
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peer->precision = PRECISION;
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peer->sstclktype = CTL_SST_TS_UHF;
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peer->minpoll = TRMB_MINPOLL;
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peer->maxpoll = TRMB_MAXPOLL;
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memcpy((char *)&pp->refid, REFID, 4);
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up->leap_status = 0;
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up->unit = (short) unit;
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up->rpt_status = TSIP_PARSED_EMPTY;
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up->rpt_cnt = 0;
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return 1;
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}
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/*
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* palisade_shutdown - shut down the clock
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*/
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static void
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palisade_shutdown (
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#ifdef PALISADE
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unit, peer
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)
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int unit;
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struct peer *peer;
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#else /* ANSI */
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int unit,
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struct peer *peer
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)
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#endif
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{
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struct palisade_unit *up;
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struct refclockproc *pp;
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pp = peer->procptr;
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up = (struct palisade_unit *)pp->unitptr;
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io_closeclock(&pp->io);
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free(up);
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}
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/*
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* unpack_date - get day and year from date
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*/
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int
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day_of_year (
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#ifdef PALISADE
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dt
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)
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char * dt;
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#else
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char * dt
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)
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#endif
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{
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int day, mon, year;
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mon = dt[1];
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/* Check month is inside array bounds */
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if ((mon < 1) || (mon > 12))
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return -1;
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day = dt[0] + days_of_year[mon - 1];
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year = getint((u_char *) (dt + 2));
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if ( !(year % 4) && ((year % 100) ||
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(!(year % 100) && !(year%400)))
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&&(mon > 2))
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day ++; /* leap year and March or later */
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return day;
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}
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/*
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* TSIP_decode - decode the TSIP data packets
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*/
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int
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TSIP_decode (
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#ifdef PALISADE
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peer
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)
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struct peer *peer;
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#else
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struct peer *peer
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)
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#endif
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{
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int st;
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long secint;
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double secs;
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double secfrac;
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unsigned short event = 0;
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struct palisade_unit *up;
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struct refclockproc *pp;
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pp = peer->procptr;
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up = (struct palisade_unit *)pp->unitptr;
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/*
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* Check the time packet, decode its contents.
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* If the timecode has invalid length or is not in
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* proper format, declare bad format and exit.
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*/
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if ((up->rpt_buf[0] == (char) 0x41) ||
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(up->rpt_buf[0] == (char) 0x46) ||
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(up->rpt_buf[0] == (char) 0x54) ||
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(up->rpt_buf[0] == (char) 0x4B) ||
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(up->rpt_buf[0] == (char) 0x6D)) {
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/* standard time packet - GPS time and GPS week number */
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#ifdef DEBUG
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printf("Palisade Port B packets detected. Connect to Port A\n");
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#endif
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return 0;
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}
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if (up->rpt_buf[0] == (char) 0x8f) {
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/*
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* Superpackets
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*/
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event = (unsigned short) (getint((u_char *) &mb(1)) & 0xffff);
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if (!((pp->sloppyclockflag & CLK_FLAG2) || event))
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/* Ignore Packet */
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return 0;
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switch (mb(0) & 0xff) {
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int GPS_UTC_Offset;
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case PACKET_8F0B:
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if (up->polled <= 0)
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return 0;
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if (up->rpt_cnt != LENCODE_8F0B) /* check length */
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break;
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#ifdef DEBUG
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if (debug > 1) {
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int ts;
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double lat, lon, alt;
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lat = getdbl((u_char *) &mb(42)) * R2D;
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lon = getdbl((u_char *) &mb(50)) * R2D;
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alt = getdbl((u_char *) &mb(58));
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printf("TSIP_decode: unit %d: Latitude: %03.4f Longitude: %03.4f Alt: %05.2f m\n",
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up->unit, lat,lon,alt);
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printf("TSIP_decode: unit %d: Sats:", up->unit);
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for (st = 66, ts = 0; st <= 73; st++) if (mb(st)) {
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if (mb(st) > 0) ts++;
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printf(" %02d", mb(st));
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}
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printf(" : Tracking %d\n", ts);
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}
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#endif
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GPS_UTC_Offset = getint((u_char *) &mb(16));
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if (GPS_UTC_Offset == 0) { /* Check UTC offset */
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#ifdef DEBUG
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printf("TSIP_decode: UTC Offset Unknown\n");
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#endif
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break;
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}
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secs = getdbl((u_char *) &mb(3));
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secint = (long) secs;
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secfrac = secs - secint; /* 0.0 <= secfrac < 1.0 */
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pp->usec = (long) (secfrac * 1000000);
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secint %= 86400; /* Only care about today */
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pp->hour = secint / 3600;
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secint %= 3600;
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pp->minute = secint / 60;
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secint %= 60;
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pp->second = secint % 60;
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if ((pp->day = day_of_year(&mb(11))) < 0) break;
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pp->year = getint((u_char *) &mb(13));
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#ifdef DEBUG
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if (debug > 1)
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printf("TSIP_decode: unit %d: %02X #%d %02d:%02d:%02d.%06ld %02d/%02d/%04d UTC %02d\n",
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up->unit, mb(0) & 0xff, event, pp->hour, pp->minute,
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pp->second, pp->usec, mb(12), mb(11), pp->year, GPS_UTC_Offset);
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#endif
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/* Only use this packet when no
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* 8F-AD's are being received
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*/
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if (up->leap_status) {
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up->leap_status = 0;
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return 0;
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}
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return 2;
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break;
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case PACKET_NTP:
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/* Palisade-NTP Packet */
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if (up->rpt_cnt != LENCODE_NTP) /* check length */
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break;
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up->leap_status = mb(19);
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if (up->polled <= 0)
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return 0;
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/* Check Tracking Status */
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st = mb(18);
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if (st < 0 || st > 14) st = 14;
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if ((st >= 2 && st <= 7) || st == 11 || st == 12) {
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#ifdef DEBUG
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printf("TSIP_decode: Not Tracking Sats : %s\n",
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*Tracking_Status[st]);
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#endif
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refclock_report(peer, CEVNT_BADTIME);
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up->polled = -1;
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return 0;
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break;
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}
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if (up->leap_status & PALISADE_LEAP_PENDING) {
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if (up->leap_status & PALISADE_UTC_TIME)
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pp->leap = LEAP_ADDSECOND;
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else
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pp->leap = LEAP_DELSECOND;
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}
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else if (up->leap_status)
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pp->leap = LEAP_NOWARNING;
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else { /* UTC flag is not set:
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* Receiver may have been reset, and lost
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* its UTC almanac data */
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pp->leap = LEAP_NOTINSYNC;
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#ifdef DEBUG
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printf("TSIP_decode: UTC Almanac unavailable: %d\n",
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mb(19));
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#endif
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refclock_report(peer, CEVNT_BADTIME);
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up->polled = -1;
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return 0;
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}
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pp->usec = (long) (getdbl((u_char *) &mb(3)) * 1000000);
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if ((pp->day = day_of_year(&mb(14))) < 0)
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break;
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pp->year = getint((u_char *) &mb(16));
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pp->hour = mb(11);
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pp->minute = mb(12);
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pp->second = mb(13);
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#ifdef DEBUG
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if (debug > 1)
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printf("TSIP_decode: unit %d: %02X #%d %02d:%02d:%02d.%06ld %02d/%02d/%04d UTC %02x %s\n",
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up->unit, mb(0) & 0xff, event, pp->hour, pp->minute,
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pp->second, pp->usec, mb(15), mb(14), pp->year,
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mb(19), *Tracking_Status[st]);
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#endif
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return 1;
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break;
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default:
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/* Ignore Packet */
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return 0;
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} /* switch */
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}/* if 8F packets */
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refclock_report(peer, CEVNT_BADREPLY);
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up->polled = -1;
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#ifdef DEBUG
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printf("TSIP_decode: unit %d: bad packet %02x-%02x event %d len %d\n",
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up->unit, up->rpt_buf[0] & 0xff, mb(0) & 0xff,
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event, up->rpt_cnt);
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#endif
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return 0;
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}
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/*
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* palisade__receive - receive data from the serial interface
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*/
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static void
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palisade_receive (
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#ifdef PALISADE
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peer
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)
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struct peer * peer;
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#else /* ANSI */
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struct peer * peer
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)
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#endif
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{
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struct palisade_unit *up;
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struct refclockproc *pp;
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/*
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* Initialize pointers and read the timecode and timestamp.
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*/
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pp = peer->procptr;
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up = (struct palisade_unit *)pp->unitptr;
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if (! TSIP_decode(peer)) return;
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if (up->polled <= 0)
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return; /* no poll pending, already received or timeout */
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up->polled = 0; /* Poll reply received */
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pp->lencode = 0; /* clear time code */
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#ifdef DEBUG
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if (debug)
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printf(
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|
"palisade_receive: unit %d: %4d %03d %02d:%02d:%02d.%06ld\n",
|
|
up->unit, pp->year, pp->day, pp->hour, pp->minute,
|
|
pp->second, pp->usec);
|
|
#endif
|
|
|
|
/*
|
|
* Process the sample
|
|
* Generate timecode: YYYY DoY HH:MM:SS.microsec
|
|
* report and process
|
|
*/
|
|
|
|
(void) sprintf(pp->a_lastcode,"%4d %03d %02d:%02d:%02d.%06ld",
|
|
pp->year,pp->day,pp->hour,pp->minute, pp->second,pp->usec);
|
|
pp->lencode = 24;
|
|
|
|
#ifdef PALISADE
|
|
pp->lasttime = current_time;
|
|
#endif
|
|
if (!refclock_process(pp
|
|
#ifdef PALISADE
|
|
, PALISADE_SAMPLES, PALISADE_SAMPLES * 3 / 5
|
|
#endif
|
|
)) {
|
|
refclock_report(peer, CEVNT_BADTIME);
|
|
|
|
#ifdef DEBUG
|
|
printf("palisade_receive: unit %d: refclock_process failed!\n",
|
|
up->unit);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
record_clock_stats(&peer->srcadr, pp->a_lastcode);
|
|
|
|
#ifdef DEBUG
|
|
if (debug)
|
|
printf("palisade_receive: unit %d: %s\n",
|
|
up->unit, prettydate(&pp->lastrec));
|
|
#endif
|
|
|
|
refclock_receive(peer
|
|
#ifdef PALISADE
|
|
, &pp->offset, 0, pp->dispersion,
|
|
&pp->lastrec, &pp->lastrec, pp->leap
|
|
#endif
|
|
);
|
|
}
|
|
|
|
|
|
/*
|
|
* palisade_poll - called by the transmit procedure
|
|
*
|
|
*/
|
|
static void
|
|
palisade_poll (
|
|
#ifdef PALISADE
|
|
unit, peer
|
|
)
|
|
int unit;
|
|
struct peer *peer;
|
|
#else
|
|
int unit,
|
|
struct peer *peer
|
|
)
|
|
#endif
|
|
{
|
|
struct palisade_unit *up;
|
|
struct refclockproc *pp;
|
|
|
|
pp = peer->procptr;
|
|
up = (struct palisade_unit *)pp->unitptr;
|
|
|
|
pp->polls++;
|
|
if (up->polled > 0) /* last reply never arrived or error */
|
|
refclock_report(peer, CEVNT_TIMEOUT);
|
|
|
|
up->polled = 2; /* synchronous packet + 1 event */
|
|
|
|
#ifdef DEBUG
|
|
if (debug)
|
|
printf("palisade_poll: unit %d: polling %s\n", unit,
|
|
(pp->sloppyclockflag & CLK_FLAG2) ?
|
|
"synchronous packet" : "event");
|
|
#endif
|
|
|
|
if (pp->sloppyclockflag & CLK_FLAG2)
|
|
return; /* using synchronous packet input */
|
|
|
|
if (HW_poll(pp) < 0)
|
|
refclock_report(peer, CEVNT_FAULT);
|
|
}
|
|
|
|
|
|
static void
|
|
palisade_io (
|
|
#ifdef PALISADE
|
|
rbufp
|
|
)
|
|
struct recvbuf *rbufp;
|
|
#else /* ANSI */
|
|
struct recvbuf *rbufp
|
|
)
|
|
#endif
|
|
{
|
|
/*
|
|
* Initialize pointers and read the timecode and timestamp.
|
|
*/
|
|
struct palisade_unit *up;
|
|
struct refclockproc *pp;
|
|
struct peer *peer;
|
|
|
|
char * c, * d;
|
|
|
|
peer = (struct peer *)rbufp->recv_srcclock;
|
|
pp = peer->procptr;
|
|
up = (struct palisade_unit *)pp->unitptr;
|
|
|
|
c = (char *) &rbufp->recv_space;
|
|
d = c + rbufp->recv_length;
|
|
|
|
while (c != d) {
|
|
|
|
/* Build time packet */
|
|
switch (up->rpt_status) {
|
|
|
|
case TSIP_PARSED_DLE_1:
|
|
switch (*c)
|
|
{
|
|
case 0:
|
|
case DLE:
|
|
case ETX:
|
|
up->rpt_status = TSIP_PARSED_EMPTY;
|
|
break;
|
|
|
|
default:
|
|
up->rpt_status = TSIP_PARSED_DATA;
|
|
/* save packet ID */
|
|
up->rpt_buf[0] = *c;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TSIP_PARSED_DATA:
|
|
if (*c == DLE)
|
|
up->rpt_status = TSIP_PARSED_DLE_2;
|
|
else
|
|
mb(up->rpt_cnt++) = *c;
|
|
break;
|
|
|
|
case TSIP_PARSED_DLE_2:
|
|
if (*c == DLE) {
|
|
up->rpt_status = TSIP_PARSED_DATA;
|
|
mb(up->rpt_cnt++) =
|
|
*c;
|
|
}
|
|
else if (*c == ETX)
|
|
up->rpt_status = TSIP_PARSED_FULL;
|
|
else {
|
|
/* error: start new report packet */
|
|
up->rpt_status = TSIP_PARSED_DLE_1;
|
|
up->rpt_buf[0] = *c;
|
|
}
|
|
break;
|
|
|
|
case TSIP_PARSED_FULL:
|
|
case TSIP_PARSED_EMPTY:
|
|
default:
|
|
if ( *c != DLE)
|
|
up->rpt_status = TSIP_PARSED_EMPTY;
|
|
else
|
|
up->rpt_status = TSIP_PARSED_DLE_1;
|
|
break;
|
|
}
|
|
|
|
c++;
|
|
|
|
if (up->rpt_status == TSIP_PARSED_DLE_1) {
|
|
up->rpt_cnt = 0;
|
|
if (pp->sloppyclockflag & CLK_FLAG2)
|
|
/* stamp it */
|
|
get_systime(&pp->lastrec);
|
|
}
|
|
else if (up->rpt_status == TSIP_PARSED_EMPTY)
|
|
up->rpt_cnt = 0;
|
|
|
|
else if (up->rpt_cnt > BMAX)
|
|
up->rpt_status =TSIP_PARSED_EMPTY;
|
|
|
|
if (up->rpt_status == TSIP_PARSED_FULL)
|
|
palisade_receive(peer);
|
|
|
|
} /* while chars in buffer */
|
|
}
|
|
|
|
|
|
/*
|
|
* Trigger the Palisade's event input, which is driven off the RTS
|
|
*
|
|
* Take a system time stamp to match the GPS time stamp.
|
|
*
|
|
*/
|
|
long
|
|
HW_poll (
|
|
#ifdef PALISADE
|
|
pp /* pointer to unit structure */
|
|
)
|
|
struct refclockproc * pp; /* pointer to unit structure */
|
|
#else
|
|
struct refclockproc * pp /* pointer to unit structure */
|
|
)
|
|
#endif
|
|
{
|
|
int x; /* state before & after RTS set */
|
|
struct palisade_unit *up;
|
|
|
|
up = (struct palisade_unit *) pp->unitptr;
|
|
|
|
/* read the current status, so we put things back right */
|
|
if (ioctl(pp->io.fd, TIOCMGET, &x) < 0) {
|
|
#ifdef DEBUG
|
|
if (debug)
|
|
printf("Palisade HW_poll: unit %d: GET %s\n", up->unit, strerror(errno));
|
|
#endif
|
|
msyslog(LOG_ERR, "Palisade(%d) HW_poll: ioctl(fd,GET): %m",
|
|
up->unit);
|
|
return -1;
|
|
}
|
|
|
|
x |= TIOCM_RTS; /* turn on RTS */
|
|
|
|
/* Edge trigger */
|
|
if (ioctl(pp->io.fd, TIOCMSET, &x) < 0) {
|
|
#ifdef DEBUG
|
|
if (debug)
|
|
printf("Palisade HW_poll: unit %d: SET \n", up->unit);
|
|
#endif
|
|
msyslog(LOG_ERR,
|
|
"Palisade(%d) HW_poll: ioctl(fd, SET, RTS_on): %m",
|
|
up->unit);
|
|
return -1;
|
|
}
|
|
|
|
x &= ~TIOCM_RTS; /* turn off RTS */
|
|
|
|
/* poll timestamp */
|
|
get_systime(&pp->lastrec);
|
|
|
|
if (ioctl(pp->io.fd, TIOCMSET, &x) == -1) {
|
|
#ifdef DEBUG
|
|
if (debug)
|
|
printf("Palisade HW_poll: unit %d: UNSET \n", up->unit);
|
|
#endif
|
|
msyslog(LOG_ERR,
|
|
"Palisade(%d) HW_poll: ioctl(fd, UNSET, RTS_off): %m",
|
|
up->unit);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 0 /* unused */
|
|
/*
|
|
* this 'casts' a character array into a float
|
|
*/
|
|
float
|
|
getfloat (
|
|
#ifdef PALISADE
|
|
bp
|
|
)
|
|
u_char *bp;
|
|
#else
|
|
u_char *bp
|
|
)
|
|
#endif
|
|
{
|
|
float sval;
|
|
#ifdef WORDS_BIGENDIAN
|
|
((char *) &sval)[0] = *bp++;
|
|
((char *) &sval)[1] = *bp++;
|
|
((char *) &sval)[2] = *bp++;
|
|
((char *) &sval)[3] = *bp++;
|
|
#else
|
|
((char *) &sval)[3] = *bp++;
|
|
((char *) &sval)[2] = *bp++;
|
|
((char *) &sval)[1] = *bp++;
|
|
((char *) &sval)[0] = *bp;
|
|
#endif /* ! XNTP_BIG_ENDIAN */
|
|
return sval;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* this 'casts' a character array into a double
|
|
*/
|
|
double
|
|
getdbl (
|
|
#ifdef PALISADE
|
|
bp
|
|
)
|
|
u_char *bp;
|
|
#else
|
|
u_char *bp
|
|
)
|
|
#endif
|
|
{
|
|
double dval;
|
|
#ifdef WORDS_BIGENDIAN
|
|
((char *) &dval)[0] = *bp++;
|
|
((char *) &dval)[1] = *bp++;
|
|
((char *) &dval)[2] = *bp++;
|
|
((char *) &dval)[3] = *bp++;
|
|
((char *) &dval)[4] = *bp++;
|
|
((char *) &dval)[5] = *bp++;
|
|
((char *) &dval)[6] = *bp++;
|
|
((char *) &dval)[7] = *bp;
|
|
#else
|
|
((char *) &dval)[7] = *bp++;
|
|
((char *) &dval)[6] = *bp++;
|
|
((char *) &dval)[5] = *bp++;
|
|
((char *) &dval)[4] = *bp++;
|
|
((char *) &dval)[3] = *bp++;
|
|
((char *) &dval)[2] = *bp++;
|
|
((char *) &dval)[1] = *bp++;
|
|
((char *) &dval)[0] = *bp;
|
|
#endif /* ! XNTP_BIG_ENDIAN */
|
|
return dval;
|
|
}
|
|
|
|
/*
|
|
* cast a 16 bit character array into a short (16 bit) int
|
|
*/
|
|
short
|
|
getint (
|
|
#ifdef PALISADE
|
|
bp
|
|
)
|
|
u_char *bp;
|
|
#else
|
|
u_char *bp
|
|
)
|
|
#endif
|
|
{
|
|
return (short) (bp[1] + (bp[0] << 8));
|
|
}
|
|
|
|
#endif /* REFCLOCK */
|