Merge branch 'next' of git://gitorious.org/fg/simgear into next

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

diff --git a/simgear/timing/timezone.cxx b/simgear/timing/timezone.cxx
index d8ef91d27990f0e43d76c22878a32ecf9a1b9acd..7f09e6c6796e5896a2456ee13380887a32f41f5e 100644 (file)
--- a/simgear/timing/timezone.cxx
+++ b/simgear/timing/timezone.cxx
@@ -12,16 +12,15 @@
  * 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.
  *
  **************************************************************************/
 
 /*************************************************************************
  *
- * Timezone is derived from geocoord, and stores the timezone centerpoint,
+ * SGTimeZone is derived from geocoord, and stores the timezone centerpoint,
  * as well as the countrycode and the timezone descriptor. The latter is 
  * used in order to get the local time. 
  *
@@ -30,19 +29,24 @@
 #include <errno.h>
 #include <string.h>
 #include <stdio.h>
+#include <cstdlib>
+
+#include <simgear/structure/exception.hxx>
+
 #include "timezone.h"
 
-Timezone::Timezone(float la, float lo, char* cc, char* desc) :
-    GeoCoord(la, lo)
+SGTimeZone::SGTimeZone(const SGGeod& geod, char* cc, char* desc) :
+    centerpoint(SGVec3d::fromGeod(geod))
 { 
     countryCode = cc;
     descriptor = desc;
 }
 
 /* Build a timezone object from a textline in zone.tab */
-Timezone::Timezone(const char *infoString) :
-    GeoCoord()
+SGTimeZone::SGTimeZone(const char *infoString)
 {
+    double lat = 0.0, lon = 0.0;
+    
     int i = 0;
     while (infoString[i] != '\t')
         i++;
@@ -108,52 +112,78 @@ Timezone::Timezone(const char *infoString) :
     strncpy(buffer, (&infoString[start]), size);
     buffer[size] = 0;
     descriptor = buffer;
+    
+    centerpoint = SGVec3d::fromGeod(SGGeod::fromDeg(lon, lat));
 }
 
 /* the copy constructor */
-Timezone::Timezone(const Timezone& other)
+SGTimeZone::SGTimeZone(const SGTimeZone& other)
 {
-    lat = other.getLat();
-    lon = other.getLon();
+    centerpoint = other.centerpoint;
     countryCode = other.countryCode;
     descriptor = other.descriptor;
 }
 
 
-/********* Member functions for TimezoneContainer class ********/
+/********* Member functions for SGTimeZoneContainer class ********/
 
-TimezoneContainer::TimezoneContainer(const char *filename)
+SGTimeZoneContainer::SGTimeZoneContainer(const char *filename)
 {
     char buffer[256];
     FILE* infile = fopen(filename, "rb");
     if (!(infile)) {
-        fprintf(stderr, "Unable to open file %s\n", filename);
-        exit(1);
-    } else { 
-        errno = 0;
+        string e = "Unable to open time zone file '";
+        throw sg_exception(e + filename + '\'');
+    }
     
-        while (1) {
-            fgets(buffer, 256, infile);
-            if (feof(infile)) {
+    errno = 0;
+
+    while (1) {
+        fgets(buffer, 256, infile);
+        if (feof(infile)) {
+            break;
+        }
+        for (char *p = buffer; *p; p++) {
+            if (*p == '#') {
+                *p = 0;
                 break;
-            }
-            for (char *p = buffer; *p; p++) {
-                if (*p == '#') {
-                    *p = 0;
-                    break;
-                }    
-            }
-            if (buffer[0]) {
-                data.push_back(new Timezone(buffer));
-            }
+            }    
         }
-        if ( errno ) {
-            perror( "TimezoneContainer()" );
-            errno = 0;
+        if (buffer[0]) {
+            zones.push_back(new SGTimeZone(buffer));
         }
     }
+    if ( errno ) {
+        perror( "SGTimeZoneContainer()" );
+        errno = 0;
+    }
+    
+    fclose(infile);
+}
+
+SGTimeZoneContainer::~SGTimeZoneContainer()
+{
+  TZVec::iterator it = zones.begin();
+  for (; it != zones.end(); ++it) {
+    delete *it;
+  }
 }
 
-TimezoneContainer::~TimezoneContainer()
+SGTimeZone* SGTimeZoneContainer::getNearest(const SGGeod& ref) const
 {
+  SGVec3d refCart(SGVec3d::fromGeod(ref));
+  SGTimeZone* match = NULL;
+  double minDist2 = HUGE_VAL;
+  
+  TZVec::const_iterator it = zones.begin();
+  for (; it != zones.end(); ++it) {
+    double d2 = distSqr((*it)->cartCenterpoint(), refCart);
+    if (d2 < minDist2) {
+      match = *it;
+      minDist2 = d2;
+    }
+  }
+
+  return match;
 }
+