MacOS tweaks contributed by Darrell Walisser.

[simgear.git] / simgear / timing / sg_time.cxx

diff --git a/simgear/timing/sg_time.cxx b/simgear/timing/sg_time.cxx
index a0353d4ec2ca142e36009c4e12a5ae5e1ac1237d..16d50d3ef3962056c2ee2884f14bca6b1b907c77 100644 (file)
--- a/simgear/timing/sg_time.cxx
+++ b/simgear/timing/sg_time.cxx
@@ -4,19 +4,20 @@
 //
 // Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
 //
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License as
-// published by the Free Software Foundation; either version 2 of the
-// License, or (at your option) any later version.
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
 //
-// This program is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-// General Public License for more details.
+// Library General Public License for more details.
 //
-// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+// 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.
 //
 // $Id$
 
@@ -62,68 +63,63 @@
 #define RADHR(x)        DEGHR(x*RAD_TO_DEG)
 
 
-SGTime::SGTime( const string& root )
-{
-    FGPath zone( root );
-    zone.append( "zone.tab" );
-
-    FG_LOG( FG_EVENT, FG_DEBUG, "Reading timezone info from: " << zone.str() );
-    tzContainer = new TimezoneContainer( zone.c_str() );
-
-    zonename = NULL;
-}
-
-
-SGTime::~SGTime()
-{
-    delete tzContainer;
-
-    if ( zonename != NULL ) {
-       delete zonename;
-    }
-}
+static const double MJD0    = 2415020.0;
+static const double J2000   = 2451545.0 - MJD0;
+static const double SIDRATE = 0.9972695677;
 
 
-// Initialize the time related variables
-void SGTime::init( double lon, double lat, const string& root )
+SGTime::SGTime( double lon, double lat, const string& root )
 {
     FG_LOG( FG_EVENT, FG_INFO, "Initializing Time" );
-    gst_diff = -9999.0;
 
-    // time_t currGMT;
-    // time_t systemLocalTime;
-    // time_t aircraftLocalTime;
-
-    // would it be better to put these sanity checks in the options
-    // parsing code? (CLO)
+    gst_diff = -9999.0;
 
     cur_time = time(NULL); 
+    // cout << "Current greenwich mean time = " << asctime(gmtime(&cur_time))
+    //      << endl;
+    // cout << "Current local time          = " 
+    //      << asctime(localtime(&cur_time)) << endl;
+
+    if ( root != "" ) {
+       FGPath zone( root );
+       zone.append( "zone.tab" );
+       FG_LOG( FG_EVENT, FG_DEBUG, "Reading timezone info from: "
+               << zone.str() );
+       tzContainer = new TimezoneContainer( zone.c_str() );
+
+       GeoCoord location( RAD_TO_DEG * lat, RAD_TO_DEG * lon );
+       GeoCoord* nearestTz = tzContainer->getNearest(location);
+
+       FGPath name( root );
+       name.append( nearestTz->getDescription() );
+       zonename = strdup( name.c_str() );
+       // cout << "Using zonename = " << zonename << endl;
+    } else {
+       tzContainer = NULL;
+       zonename = NULL;
+    }
+}
+
 
-    // printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
-    // printf ("Current local time          = %24s", asctime(localtime(&cur_time)));
-    // time_t tmp = cur_time;
-    GeoCoord location( RAD_TO_DEG * lat, RAD_TO_DEG * lon );
+SGTime::SGTime( const string& root ) {
+    SGTime( 0.0, 0.0, root );
+}
 
-    GeoCoord* nearestTz = tzContainer->getNearest(location);
 
-    FGPath zone( root );
-    zone.append( nearestTz->getDescription() );
+SGTime::SGTime() {
+    SGTime( 0.0, 0.0, "" );
+}
 
-    // cout << "Using " << zone.str() << " for timezone information" << endl;
-    zonename = strdup( zone.c_str() );
-    // cout << "zonename = " << zonename << endl;
-    //show( buffer.c_str(), cur_time, 1); 
-    //printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
-    //printf ("Current local time          = %24s", asctime(localtime(&cur_time)));
-    // currGMT = get_gmt( gmtime(&cur_time) );
-    // cout << "currGMT = " << currGMT << endl;
 
-    // systemLocalTime = get_gmt( localtime(&cur_time) );
-    // cout << "systemLocalTime = " << systemLocalTime << endl;
+SGTime::~SGTime()
+{
+    if ( tzContainer != NULL ) {
+       delete tzContainer;
+    }
 
-    // aircraftLocalTime = get_gmt( fgLocaltime(&cur_time, zone.c_str()) ); 
-    //printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
-    //printf ("Current local time          = %24s", asctime(localtime(&cur_time)));
+    if ( zonename != NULL ) {
+       delete zonename;
+    }
 }
 
 
@@ -422,7 +418,7 @@ time_t sgTimeGetGMT(int year, int month, int day, int hour, int min, int sec)
 #       define TIMEZONE_OFFSET_WORKS 1
 #   endif
 
-    long int start = mktime(&mt);
+    time_t start = mktime(&mt);
 
     FG_LOG( FG_EVENT, FG_DEBUG, "start1 = " << start );
     // the ctime() call can screw up time progression on some versions