//
// Written by Curtis Olson, started August 1997.
//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+// Copyright (C) 1997 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
-// You should have received a copy of the GNU Library General Public
-// License along with this library; if not, write to the
-// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-// Boston, MA 02111-1307, USA.
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#include <errno.h> // for errno
-#ifdef SG_HAVE_STD_INCLUDES
-# include <cstdio>
-# include <cstdlib>
-# include <ctime>
-#else
-# include <math.h>
-# include <stdio.h>
-# include <stdlib.h>
-#endif
+#include <cstdio>
+#include <cstdlib>
+#include <ctime>
+#include <cstring>
+
+#include <string>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h> // for get/setitimer, gettimeofday, struct timeval
#include "timezone.h"
#include "lowleveltime.h"
-
#define DEGHR(x) ((x)/15.)
#define RADHR(x) DEGHR(x*SGD_RADIANS_TO_DEGREES)
+using std::string;
static const double MJD0 = 2415020.0;
static const double J2000 = 2451545.0 - MJD0;
static const double SIDRATE = 0.9972695677;
+// tzContainer stores all the current Timezone control points/
+std::auto_ptr<SGTimeZoneContainer> static_tzContainer;
-void SGTime::init( double lon, double lat,
- const string& root, time_t init_time )
+void SGTime::init( const SGGeod& location, const SGPath& root, time_t init_time )
{
- SG_LOG( SG_EVENT, SG_INFO, "Initializing Time" );
-
gst_diff = -9999.0;
if ( init_time ) {
cur_time = time(NULL);
}
- cout << "Current greenwich mean time = " << asctime(gmtime(&cur_time))
- << endl;
- cout << "Current local time = "
- << asctime(localtime(&cur_time)) << endl;
+ SG_LOG( SG_EVENT, SG_DEBUG,
+ "Current greenwich mean time = " << asctime(gmtime(&cur_time)));
+ SG_LOG( SG_EVENT, SG_DEBUG,
+ "Current local time = " << asctime(localtime(&cur_time)));
- if ( root != (string)"" ) {
- SGPath zone( root );
- zone.append( "zone.tab" );
- SG_LOG( SG_EVENT, SG_INFO, "Reading timezone info from: "
- << zone.str() );
- tzContainer = new TimezoneContainer( zone.c_str() );
+ if ( !root.isNull()) {
+ if (!static_tzContainer.get()) {
+ SGPath zone( root );
+ zone.append( "zone.tab" );
+ SG_LOG( SG_EVENT, SG_INFO, "Reading timezone info from: "
+ << zone.str() );
+ static_tzContainer.reset(new SGTimeZoneContainer( zone.c_str() ));
+ }
- GeoCoord location( SGD_RADIANS_TO_DEGREES * lat, SGD_RADIANS_TO_DEGREES * lon );
- GeoCoord* nearestTz = tzContainer->getNearest(location);
+ SGTimeZone* nearestTz = static_tzContainer->getNearest(location);
SGPath name( root );
name.append( nearestTz->getDescription() );
- zonename = strdup( name.c_str() );
- SG_LOG( SG_EVENT, SG_INFO, "Using zonename = " << zonename );
+ zonename = name.str();
+ SG_LOG( SG_EVENT, SG_DEBUG, "Using zonename = " << zonename );
} else {
- SG_LOG( SG_EVENT, SG_INFO, "*** NO TIME ZONE NAME ***" );
- tzContainer = NULL;
- zonename = NULL;
+ zonename.erase();
}
}
-SGTime::SGTime( double lon, double lat, const string& root, time_t init_time )
+SGTime::SGTime( const SGGeod& location, const SGPath& root,
+ time_t init_time )
{
- init( lon, lat, root, init_time );
+ init(location, root, init_time);
}
-
-SGTime::SGTime( const string& root ) {
- init( 0.0, 0.0, root, 0 );
+SGTime::SGTime( const SGPath& root ) {
+ init( SGGeod(), root, 0 );
}
SGTime::SGTime() {
- init( 0.0, 0.0, "", 0 );
+ init( SGGeod(), SGPath(), 0 );
}
SGTime::~SGTime()
{
- if ( tzContainer != NULL ) {
- TimezoneContainer *tmp = tzContainer;
- tzContainer = NULL;
- delete tmp;
- }
-
- if ( zonename != NULL ) {
- char *tmp = zonename;
- zonename = NULL;
- free(tmp);
- }
}
{
time_t start_gmt, now;
double diff, part, days, hours, lstTmp;
- char tbuf[64];
now = cur_time;
start_gmt = sgTimeGetGMT(gmt->tm_year, 2, 21, 12, 0, 0);
- SG_LOG( SG_EVENT, SG_DEBUG, " COURSE: GMT = "
- << sgTimeFormatTime(gmt, tbuf) );
- SG_LOG( SG_EVENT, SG_DEBUG, " March 21 noon (GMT) = " << start_gmt );
-
diff = (now - start_gmt) / (3600.0 * 24.0);
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Time since 3/21/" << gmt->tm_year << " GMT = " << diff );
-
part = fmod(diff, 1.0);
days = diff - part;
hours = gmt->tm_hour + gmt->tm_min/60.0 + gmt->tm_sec/3600.0;
while ( lstTmp < 0.0 ) {
lstTmp += 24.0;
}
-
- SG_LOG( SG_EVENT, SG_DEBUG,
- " days = " << days << " hours = " << hours << " lon = "
- << lng << " lst = " << lstTmp );
-
+
return lstTmp;
}
-
// Update the time related variables
-void SGTime::update( double lon, double lat, time_t ct, long int warp ) {
+void SGTime::update( const SGGeod& location, time_t ct, long int warp )
+{
double gst_precise, gst_course;
-#if defined(_MSC_VER) || defined(__MINGW32__)
+
tm * gmt = &m_gmt;
-#endif
- SG_LOG( SG_EVENT, SG_DEBUG, "Updating time" );
// get current Unix calendar time (in seconds)
// warp += warp_delta;
} else {
cur_time = time(NULL) + warp;
}
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current Unix calendar time = " << cur_time
- << " warp = " << warp );
// get GMT break down for current time
-#if defined(_MSC_VER) || defined(__MINGW32__)
- memcpy( gmt, gmtime(&cur_time), sizeof(tm) );
-#else
- gmt = gmtime(&cur_time);
-#endif
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current GMT = " << gmt->tm_mon+1 << "/"
- << gmt->tm_mday << "/" << (1900 + gmt->tm_year) << " "
- << gmt->tm_hour << ":" << gmt->tm_min << ":"
- << gmt->tm_sec );
+ memcpy( gmt, gmtime(&cur_time), sizeof(tm) );
// calculate modified Julian date starting with current
mjd = sgTimeCurrentMJD( ct, warp );
// convert "back" to Julian date + partial day (as a fraction of one)
jd = mjd + MJD0;
- SG_LOG( SG_EVENT, SG_DEBUG, " Current Julian Date = " << jd );
// printf(" Current Longitude = %.3f\n", FG_Longitude * SGD_RADIANS_TO_DEGREES);
if ( gst_diff < -100.0 ) {
// first time through do the expensive calculation & cheap
// calculation to get the difference.
- SG_LOG( SG_EVENT, SG_INFO, " First time, doing precise gst" );
+ SG_LOG( SG_EVENT, SG_DEBUG, " First time, doing precise gst" );
gst_precise = gst = sidereal_precise( mjd, 0.00 );
gst_course = sidereal_course( cur_time, gmt, 0.00 );
gst_diff = gst_precise - gst_course;
- lst = sidereal_course( cur_time, gmt, -(lon * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
+ lst = sidereal_course( cur_time, gmt,
+ -location.getLongitudeDeg() ) + gst_diff;
} else {
// course + difference should drift off very slowly
gst = sidereal_course( cur_time, gmt, 0.00 ) + gst_diff;
- lst = sidereal_course( cur_time, gmt, -(lon * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
+ lst = sidereal_course( cur_time, gmt,
+ -location.getLongitudeDeg() ) + gst_diff;
}
-
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current lon=0.00 Sidereal Time = " << gst );
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current LOCAL Sidereal Time = " << lst << " ("
- << sidereal_precise( mjd, -(lon * SGD_RADIANS_TO_DEGREES) )
- << ") (diff = " << gst_diff << ")" );
}
// Given lon/lat, update timezone information and local_offset
-void SGTime::updateLocal( double lon, double lat, const string& root ) {
- // sanity checking
- if ( lon < -SGD_PI || lon > SGD_PI ) {
- // not within -180 ... 180
- lon = 0.0;
- }
- if ( lat < -SGD_PI * 0.5 || lat > SGD_PI * 0.5 ) {
- // not within -90 ... 90
- lat = 0.0;
- }
- if ( lon != lon ) {
- // only true if lon == nan
- SG_LOG( SG_EVENT, SG_ALERT, " Detected lon == nan, resetting to 0.0" );
- lon = 0.0;
- }
- if ( lat != lat ) {
- // only true if lat == nan
- SG_LOG( SG_EVENT, SG_ALERT, " Detected lat == nan, resetting to 0.0" );
- lat = 0.0;
+void SGTime::updateLocal( const SGGeod& aLocation, const string& root ) {
+ SGGeod location(aLocation);
+ if (!aLocation.isValid()) {
+ location = SGGeod();
}
+
time_t currGMT;
time_t aircraftLocalTime;
- GeoCoord location( SGD_RADIANS_TO_DEGREES * lat, SGD_RADIANS_TO_DEGREES * lon );
- GeoCoord* nearestTz = tzContainer->getNearest(location);
+ SGTimeZone* nearestTz = static_tzContainer->getNearest(location);
SGPath zone( root );
zone.append ( nearestTz->getDescription() );
- if ( zonename ) {
- char *ptr = zonename;
- zonename = NULL;
- free(ptr);
- }
- zonename = strdup( zone.c_str() );
+ zonename = zone.str();
//Avoid troubles when zone.tab hasn't got the right line endings
- if (zonename[strlen(zonename)-1] == '\r')
+ if (zonename[zonename.size()-1] == '\r')
{
- zonename[strlen(zonename)-1]=0;
+ zonename[zonename.size()-1]=0;
zone.set( zonename );
}
// since 1900 jan 0.5), mjd.
double sgTimeCurrentMJD( time_t ct, long int warp ) {
-#if defined(_MSC_VER) || defined(__MINGW32__)
struct tm m_gmt; // copy of system gmtime(&time_t) structure
struct tm *gmt = &m_gmt;
-#else
- struct tm *gmt;
-#endif
// get current Unix calendar time (in seconds)
// warp += warp_delta;
} else {
cur_time = time(NULL) + warp;
}
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current Unix calendar time = " << cur_time
- << " warp = " << warp );
// get GMT break down for current time
-#if defined(_MSC_VER) || defined(__MINGW32__)
memcpy( gmt, gmtime(&cur_time), sizeof(tm) );
-#else
- gmt = gmtime(&cur_time);
-#endif
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current GMT = " << gmt->tm_mon+1 << "/"
- << gmt->tm_mday << "/" << (1900 + gmt->tm_year) << " "
- << gmt->tm_hour << ":" << gmt->tm_min << ":"
- << gmt->tm_sec );
// calculate modified Julian date
// t->mjd = cal_mjd ((int)(t->gmt->tm_mon+1), (double)t->gmt->tm_mday,
x /= 3600.0;
gst = (1.0/SIDRATE)*hr + x;
- SG_LOG( SG_EVENT, SG_DEBUG, " gst => " << gst );
-
return gst;
}
#else // ! defined ( MK_TIME_IS_GMT )
// timezone seems to work as a proper offset for Linux & Solaris
-# if defined( __linux__ ) || defined( __sun__ ) ||defined(__CYGWIN__)
+# if defined( __linux__ ) || defined(__sun) ||defined(__CYGWIN__)
# define TIMEZONE_OFFSET_WORKS 1
# endif
if ( daylight > 0 ) {
daylight = 1;
} else if ( daylight < 0 ) {
- SG_LOG( SG_EVENT, FG_WARN,
+ SG_LOG( SG_EVENT, SG_WARN,
"OOOPS, problem in sg_time.cxx, no daylight savings info." );
}
projects / simgear.git / blobdiff