Moved JSBSim.hxx to src/FDM/JSBSim/

[flightgear.git] / src / ATC / atislist.cxx

diff --git a/src/ATC/atislist.cxx b/src/ATC/atislist.cxx
index 54f5ae0eea655f050120fccec7761683339cec17..72e81e903c03d083035669fd012eee5a6a6c1a2f 100644 (file)
--- a/src/ATC/atislist.cxx
+++ b/src/ATC/atislist.cxx
@@ -26,6 +26,7 @@
 #include <simgear/debug/logstream.hxx>
 #include <simgear/misc/sgstream.hxx>
 #include <simgear/math/sg_geodesy.hxx>
+#include <simgear/math/sg_random.h>
 
 #include "atislist.hxx"
 
@@ -147,3 +148,53 @@ bool FGATISList::query( double lon, double lat, double elev, double freq,
 
     return false;
 }
+
+
+int FGATISList::GetCallSign( string apt_id, int hours, int mins )
+{
+    atis_transmission_type tran;
+
+    if(atislog.find(apt_id) == atislog.end()) {
+       // This station has not transmitted yet - return a random identifier
+       // and add the transmission to the log
+       tran.hours = hours;
+       tran.mins = mins;
+       sg_srandom_time();
+       tran.callsign = int(sg_random() * 25) + 1;      // This *should* give a random int between 1 and 26
+       //atislog[apt_id].push_back(tran);
+       atislog[apt_id] = tran;
+    } else {
+       // This station has transmitted - calculate the appropriate identifier
+       // and add the transmission to the log if it has changed
+       tran = atislog[apt_id];
+       // This next bit assumes that no-one comes back to the same ATIS station
+       // after running FlightGear for more than 24 hours !!
+       if((tran.hours == hours) && (tran.mins == mins)) {
+           return(tran.callsign);
+       } else {
+           if(tran.hours == hours) {
+               // The minutes must have changed
+               tran.mins = mins;
+               tran.callsign++;
+           } else {
+               if(hours < tran.hours) {
+                   hours += 24;
+               }
+               tran.callsign += (hours - tran.hours);
+               if(mins != 0) {
+                   // Assume transmissions were made on every hour
+                   tran.callsign++;
+               }
+               tran.hours = hours;
+               tran.mins = mins;
+           }
+           // Wrap if we've exceeded Zulu
+           if(tran.callsign > 26) {
+               tran.callsign -= 26;
+           }
+           // And write the new transmission to the log
+           atislog[apt_id] = tran;
+       }
+    }
+    return(tran.callsign);
+}