// 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>
#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_rad, double lat_rad,
- 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);
}
- SG_LOG( SG_EVENT, SG_INFO,
+ SG_LOG( SG_EVENT, SG_DEBUG,
"Current greenwich mean time = " << asctime(gmtime(&cur_time)));
- SG_LOG( SG_EVENT, SG_INFO,
+ SG_LOG( SG_EVENT, SG_DEBUG,
"Current local time = " << asctime(localtime(&cur_time)));
- if ( !root.empty()) {
- SGPath zone( root );
- zone.append( "zone.tab" );
- SG_LOG( SG_EVENT, SG_INFO, "Reading timezone info from: "
- << zone.str() );
- tzContainer = new SGTimeZoneContainer( 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() ));
+ }
- SGGeoCoord location( SGD_RADIANS_TO_DEGREES * lat_rad, SGD_RADIANS_TO_DEGREES * lon_rad );
- SGGeoCoord* nearestTz = tzContainer->getNearest(location);
+ SGTimeZone* nearestTz = static_tzContainer->getNearest(location);
SGPath name( root );
name.append( nearestTz->getDescription() );
zonename = name.str();
- SG_LOG( SG_EVENT, SG_INFO, "Using zonename = " << zonename );
+ SG_LOG( SG_EVENT, SG_DEBUG, "Using zonename = " << zonename );
} else {
- SG_LOG( SG_EVENT, SG_INFO, "*** NO TIME ZONE NAME ***" );
- tzContainer = NULL;
zonename.erase();
}
}
-SGTime::SGTime( double lon_rad, double lat_rad, const string& root,
- time_t init_time )
+SGTime::SGTime( const SGGeod& location, const SGPath& root,
+ time_t init_time )
{
- init( lon_rad, lat_rad, 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 ) {
- SGTimeZoneContainer *tmp = tzContainer;
- tzContainer = NULL;
- delete tmp;
- }
}
// Update the time related variables
-void SGTime::update( double lon_rad, double lat_rad,
- 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;
<< " 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) << " "
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_rad * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
+ -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_rad * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
+ -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_rad * SGD_RADIANS_TO_DEGREES) )
+ << sidereal_precise( mjd, -location.getLongitudeDeg() )
<< ") (diff = " << gst_diff << ")" );
}
// Given lon/lat, update timezone information and local_offset
-void SGTime::updateLocal( double lon_rad, double lat_rad, const string& root ) {
- // sanity checking
- if ( lon_rad < -SGD_PI || lon_rad> SGD_PI ) {
- // not within -180 ... 180
- lon_rad = 0.0;
- }
- if ( lat_rad < -SGD_PI_2 || lat_rad > SGD_PI_2 ) {
- // not within -90 ... 90
- lat_rad = 0.0;
- }
- if ( lon_rad != lon_rad ) {
- // only true if lon_rad == nan
- SG_LOG( SG_EVENT, SG_ALERT,
- " Detected lon_rad == nan, resetting to 0.0" );
- lon_rad = 0.0;
- }
- if ( lat_rad != lat_rad ) {
- // only true if lat_rad == nan
- SG_LOG( SG_EVENT, SG_ALERT,
- " Detected lat_rad == nan, resetting to 0.0" );
- lat_rad = 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;
- SGGeoCoord location( SGD_RADIANS_TO_DEGREES * lat_rad,
- SGD_RADIANS_TO_DEGREES * lon_rad );
- SGGeoCoord* nearestTz = tzContainer->getNearest(location);
+ SGTimeZone* nearestTz = static_tzContainer->getNearest(location);
SGPath zone( root );
zone.append ( nearestTz->getDescription() );
zonename = zone.str();
// 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;
<< " 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) << " "
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