src/Traffic/TrafficMgr.cxx

   1 /******************************************************************************
   2  * TrafficMGr.cxx
   3  * Written by Durk Talsma, started May 5, 2004.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  *
  20  **************************************************************************/
  21
  22 /*
  23  * Traffic manager parses airlines timetable-like data and uses this to
  24  * determine the approximate position of each AI aircraft in its database.
  25  * When an AI aircraft is close to the user's position, a more detailed
  26  * AIModels based simulation is set up.
  27  *
  28  * I'm currently assuming the following simplifications:
  29  * 1) The earth is a perfect sphere
  30  * 2) Each aircraft flies a perfect great circle route.
  31  * 3) Each aircraft flies at a constant speed (with infinite accelerations and
  32  *    decelerations)
  33  * 4) Each aircraft leaves at exactly the departure time.
  34  * 5) Each aircraft arrives at exactly the specified arrival time.
  35  *
  36  *
  37  *****************************************************************************/
  38
  39 #ifdef HAVE_CONFIG_H
  40 #  include "config.h"
  41 #endif
  42
  43 #include <stdlib.h>
  44 #include <time.h>
  45 #include <cstring>
  46 #include <iostream>
  47 #include <fstream>
  48
  49
  50 #include <string>
  51 #include <vector>
  52 #include <algorithm>
  53
  54 #include <simgear/compiler.h>
  55 #include <simgear/misc/sg_path.hxx>
  56 #include <simgear/misc/sg_dir.hxx>
  57 #include <simgear/props/props.hxx>
  58 #include <simgear/route/waypoint.hxx>
  59 #include <simgear/structure/subsystem_mgr.hxx>
  60 #include <simgear/xml/easyxml.hxx>
  61
  62 #include <AIModel/AIAircraft.hxx>
  63 #include <AIModel/AIFlightPlan.hxx>
  64 #include <AIModel/AIBase.hxx>
  65 #include <Airports/simple.hxx>
  66 #include <Main/fg_init.hxx>
  67
  68
  69
  70 #include "TrafficMgr.hxx"
  71
  72 using std::sort;
  73 using std::strcmp;
  74
  75 /******************************************************************************
  76  * TrafficManager
  77  *****************************************************************************/
  78 FGTrafficManager::FGTrafficManager() :
  79   inited(false),
  80   enabled("/sim/traffic-manager/enabled"),
  81   aiEnabled("/sim/ai/enabled"),
  82   metarValid("/environment/metar/valid")
  83 {
  84     //score = 0;
  85     //runCount = 0;
  86     acCounter = 0;
  87 }
  88
  89 FGTrafficManager::~FGTrafficManager()
  90 {
  91     // Save the heuristics data
  92     bool saveData = false;
  93     ofstream cachefile;
  94     if (fgGetBool("/sim/traffic-manager/heuristics")) {
  95         SGPath cacheData(fgGetString("/sim/fg-home"));
  96         cacheData.append("ai");
  97         string airport = fgGetString("/sim/presets/airport-id");
  98
  99         if ((airport) != "") {
 100             char buffer[128];
 101             ::snprintf(buffer, 128, "%c/%c/%c/",
 102                        airport[0], airport[1], airport[2]);
 103             cacheData.append(buffer);
 104             if (!cacheData.exists()) {
 105                 cacheData.create_dir(0777);
 106             }
 107             cacheData.append(airport + "-cache.txt");
 108             //cerr << "Saving AI traffic heuristics" << endl;
 109             saveData = true;
 110             cachefile.open(cacheData.str().c_str());
 111         }
 112     }
 113     for (ScheduleVectorIterator sched = scheduledAircraft.begin();
 114          sched != scheduledAircraft.end(); sched++) {
 115         if (saveData) {
 116             cachefile << (*sched)->getRegistration() << " "
 117                 << (*sched)->getRunCount() << " "
 118                 << (*sched)->getHits() << endl;
 119         }
 120         delete(*sched);
 121     }
 122     if (saveData) {
 123         cachefile.close();
 124     }
 125     scheduledAircraft.clear();
 126     flights.clear();
 127 }
 128
 129
 130 void FGTrafficManager::init()
 131 {
 132     if (!enabled || !aiEnabled) {
 133       return;
 134     }
 135
 136     heuristicsVector heuristics;
 137     HeuristicMap heurMap;
 138
 139     if (string(fgGetString("/sim/traffic-manager/datafile")) == string("")) {
 140         simgear::Dir trafficDir(SGPath(globals->get_fg_root(), "AI/Traffic"));
 141         simgear::PathList d = trafficDir.children(simgear::Dir::TYPE_DIR | simgear::Dir::NO_DOT_OR_DOTDOT);
 142
 143         for (unsigned int i=0; i<d.size(); ++i) {
 144           simgear::Dir d2(d[i]);
 145           simgear::PathList trafficFiles = d2.children(simgear::Dir::TYPE_FILE, ".xml");
 146           for (unsigned int j=0; j<trafficFiles.size(); ++j) {
 147             SGPath curFile = trafficFiles[j];
 148             SG_LOG(SG_GENERAL, SG_DEBUG,
 149                   "Scanning " << curFile.str() << " for traffic");
 150             readXML(curFile.str(), *this);
 151           }
 152         }
 153     } else {
 154         fgSetBool("/sim/traffic-manager/heuristics", false);
 155         SGPath path = string(fgGetString("/sim/traffic-manager/datafile"));
 156         string ext = path.extension();
 157         if (path.extension() == "xml") {
 158             if (path.exists()) {
 159                 readXML(path.str(), *this);
 160             }
 161         } else if (path.extension() == "conf") {
 162             if (path.exists()) {
 163                 readTimeTableFromFile(path);
 164             }
 165         } else {
 166              SG_LOG(SG_GENERAL, SG_ALERT,
 167                                "Unknown data format " << path.str()
 168                                 << " for traffic");
 169         }
 170         //exit(1);
 171     }
 172     if (fgGetBool("/sim/traffic-manager/heuristics")) {
 173         //cerr << "Processing Heuristics" << endl;
 174         // Load the heuristics data
 175         SGPath cacheData(fgGetString("/sim/fg-home"));
 176         cacheData.append("ai");
 177         string airport = fgGetString("/sim/presets/airport-id");
 178         if ((airport) != "") {
 179             char buffer[128];
 180             ::snprintf(buffer, 128, "%c/%c/%c/",
 181                        airport[0], airport[1], airport[2]);
 182             cacheData.append(buffer);
 183             cacheData.append(airport + "-cache.txt");
 184             if (cacheData.exists()) {
 185                 ifstream data(cacheData.c_str());
 186                 while (1) {
 187                     Heuristic h; // = new Heuristic;
 188                     data >> h.registration >> h.runCount >> h.hits;
 189                     if (data.eof())
 190                         break;
 191                     HeuristicMapIterator itr = heurMap.find(h.registration);
 192                     if (itr != heurMap.end()) {
 193                          SG_LOG(SG_GENERAL, SG_WARN,"Traffic Manager Warning: found duplicate tailnumber " <<
 194                          h.registration << " for AI aircraft");
 195                     }
 196                     heurMap[h.registration] = h;
 197                     heuristics.push_back(h);
 198                 }
 199             }
 200         }
 201         for (currAircraft = scheduledAircraft.begin();
 202              currAircraft != scheduledAircraft.end(); currAircraft++) {
 203             string registration = (*currAircraft)->getRegistration();
 204             HeuristicMapIterator itr = heurMap.find(registration);
 205             //cerr << "Processing heuristics for" << (*currAircraft)->getRegistration() << endl;
 206             if (itr == heurMap.end()) {
 207                 //cerr << "No heuristics found for " << registration << endl;
 208             } else {
 209                 (*currAircraft)->setrunCount(itr->second.runCount);
 210                 (*currAircraft)->setHits(itr->second.hits);
 211                 //cerr <<"Runcount " << itr->second->runCount << ".Hits " << itr->second->hits << endl;
 212             }
 213         }
 214         //cerr << "Done" << endl;
 215         //for (heuristicsVectorIterator hvi = heuristics.begin();
 216         //     hvi != heuristics.end(); hvi++) {
 217         //    delete(*hvi);
 218         //}
 219     }
 220     // Do sorting and scoring separately, to take advantage of the "homeport| variable
 221     for (currAircraft = scheduledAircraft.begin();
 222          currAircraft != scheduledAircraft.end(); currAircraft++) {
 223         (*currAircraft)->setScore();
 224     }
 225     sort(scheduledAircraft.begin(), scheduledAircraft.end(),
 226          compareSchedules);
 227     currAircraft = scheduledAircraft.begin();
 228     currAircraftClosest = scheduledAircraft.begin();
 229
 230     inited = true;
 231 }
 232
 233 void FGTrafficManager::update(double /*dt */ )
 234 {
 235     if (!enabled || !aiEnabled || !metarValid) {
 236         return;
 237     }
 238
 239     if (!inited) {
 240     // lazy-initialization, we've been enabled at run-time
 241       SG_LOG(SG_GENERAL, SG_INFO, "doing lazy-init of TrafficManager");
 242       init();
 243     }
 244
 245     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 246     if (scheduledAircraft.size() == 0) {
 247         return;
 248     }
 249
 250     SGVec3d userCart =
 251         SGVec3d::fromGeod(SGGeod::
 252                           fromDeg(fgGetDouble("/position/longitude-deg"),
 253                                   fgGetDouble("/position/latitude-deg")));
 254
 255     if (currAircraft == scheduledAircraft.end()) {
 256         currAircraft = scheduledAircraft.begin();
 257     }
 258     //cerr << "Processing << " << (*currAircraft)->getRegistration() << " with score " << (*currAircraft)->getScore() << endl;
 259     if (!((*currAircraft)->update(now, userCart))) {
 260         // NOTE: With traffic manager II, this statement below is no longer true
 261         // after proper initialization, we shouldnt get here.
 262         // But let's make sure
 263         //SG_LOG( SG_GENERAL, SG_ALERT, "Failed to update aircraft schedule in traffic manager");
 264     }
 265     currAircraft++;
 266 }
 267
 268 void FGTrafficManager::release(int id)
 269 {
 270     releaseList.push_back(id);
 271 }
 272
 273 bool FGTrafficManager::isReleased(int id)
 274 {
 275     IdListIterator i = releaseList.begin();
 276     while (i != releaseList.end()) {
 277         if ((*i) == id) {
 278             releaseList.erase(i);
 279             return true;
 280         }
 281         i++;
 282     }
 283     return false;
 284 }
 285
 286
 287 void FGTrafficManager::readTimeTableFromFile(SGPath infileName)
 288 {
 289     string model;
 290     string livery;
 291     string homePort;
 292     string registration;
 293     string flightReq;
 294     bool   isHeavy;
 295     string acType;
 296     string airline;
 297     string m_class;
 298     string FlightType;
 299     double radius;
 300     double offset;
 301
 302     char buffer[256];
 303     string buffString;
 304     vector <string> tokens, depTime,arrTime;
 305     vector <string>::iterator it;
 306     ifstream infile(infileName.str().c_str());
 307     while (1) {
 308          infile.getline(buffer, 256);
 309          if (infile.eof()) {
 310              break;
 311          }
 312          //cerr << "Read line : " << buffer << endl;
 313          buffString = string(buffer);
 314          tokens.clear();
 315          Tokenize(buffString, tokens, " \t");
 316          //for (it = tokens.begin(); it != tokens.end(); it++) {
 317          //    cerr << "Tokens: " << *(it) << endl;
 318          //}
 319          //cerr << endl;
 320          if (!tokens.empty()) {
 321              if (tokens[0] == string("AC")) {
 322                  if (tokens.size() != 13) {
 323                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 324                      exit(1);
 325                  }
 326                  model          = tokens[12];
 327                  livery         = tokens[6];
 328                  homePort       = tokens[1];
 329                  registration   = tokens[2];
 330                  if (tokens[11] == string("false")) {
 331                      isHeavy = false;
 332                  } else {
 333                      isHeavy = true;
 334                  }
 335                  acType         = tokens[4];
 336                  airline        = tokens[5];
 337                  flightReq      = tokens[3] + tokens[5];
 338                  m_class        = tokens[10];
 339                  FlightType     = tokens[9];
 340                  radius         = atof(tokens[8].c_str());
 341                  offset         = atof(tokens[7].c_str());;
 342                  SG_LOG(SG_GENERAL, SG_ALERT, "Adding Aircraft" << model << " " << livery << " " << homePort << " "
 343                                                                 << registration << " " << flightReq << " " << isHeavy
 344                                                                 << " " << acType << " " << airline << " " << m_class
 345                                                                 << " " << FlightType << " " << radius << " " << offset);
 346                  scheduledAircraft.push_back(new FGAISchedule(model,
 347                                                               livery,
 348                                                               homePort,
 349                                                               registration,
 350                                                               flightReq,
 351                                                               isHeavy,
 352                                                               acType,
 353                                                               airline,
 354                                                               m_class,
 355                                                               FlightType,
 356                                                               radius,
 357                                                               offset));
 358              }
 359              if (tokens[0] == string("FLIGHT")) {
 360                  //cerr << "Found flight " << buffString << " size is : " << tokens.size() << endl;
 361                  if (tokens.size() != 10) {
 362                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 363                      exit(1);
 364                  }
 365                  string callsign = tokens[1];
 366                  string fltrules = tokens[2];
 367                  string weekdays = tokens[3];
 368                  string departurePort = tokens[5];
 369                  string arrivalPort   = tokens[7];
 370                  int    cruiseAlt     = atoi(tokens[8].c_str());
 371                  string depTimeGen    = tokens[4];
 372                  string arrTimeGen    = tokens[6];
 373                  string repeat        = "WEEK";
 374                  string requiredAircraft = tokens[9];
 375
 376                  if (weekdays.size() != 7) {
 377                      SG_LOG(SG_GENERAL, SG_ALERT, "Found misconfigured weekdays string" << weekdays);
 378                      exit(1);
 379                  }
 380                  depTime.clear();
 381                  arrTime.clear();
 382                  Tokenize(depTimeGen, depTime, ":");
 383                  Tokenize(arrTimeGen, arrTime, ":");
 384                  double dep = atof(depTime[0].c_str()) + (atof(depTime[1].c_str()) / 60.0);
 385                  double arr = atof(arrTime[0].c_str()) + (atof(arrTime[1].c_str()) / 60.0);
 386                  //cerr << "Using " << dep << " " << arr << endl;
 387                  bool arrivalWeekdayNeedsIncrement = false;
 388                  if (arr < dep) {
 389                        arrivalWeekdayNeedsIncrement = true;
 390                  }
 391                  for (int i = 0; i < 7; i++) {
 392                      int j = i+1;
 393                      if (weekdays[i] != '.') {
 394                          char buffer[4];
 395                          snprintf(buffer, 4, "%d/", j);
 396                          string departureTime = string(buffer) + depTimeGen + string(":00");
 397                          string arrivalTime;
 398                          if (!arrivalWeekdayNeedsIncrement) {
 399                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 400                          }
 401                          if (arrivalWeekdayNeedsIncrement && i != 6 ) {
 402                              snprintf(buffer, 4, "%d/", j+1);
 403                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 404                          }
 405                          if (arrivalWeekdayNeedsIncrement && i == 6 ) {
 406                              snprintf(buffer, 4, "%d/", 0);
 407                              arrivalTime   = string(buffer) + arrTimeGen  + string(":00");
 408                          }
 409                          SG_LOG(SG_GENERAL, SG_ALERT, "Adding flight " << callsign       << " "
 410                                                       << fltrules       << " "
 411                                                       <<  departurePort << " "
 412                                                       <<  arrivalPort   << " "
 413                                                       <<  cruiseAlt     << " "
 414                                                       <<  departureTime << " "
 415                                                       <<  arrivalTime   << " "
 416                                                       << repeat        << " "
 417                                                       <<  requiredAircraft);
 418
 419                          flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 420                                                                  fltrules,
 421                                                                  departurePort,
 422                                                                  arrivalPort,
 423                                                                  cruiseAlt,
 424                                                                  departureTime,
 425                                                                  arrivalTime,
 426                                                                  repeat,
 427                                                                  requiredAircraft));
 428                     }
 429                 }
 430              }
 431          }
 432
 433     }
 434     //exit(1);
 435 }
 436
 437
 438 void FGTrafficManager::Tokenize(const string& str,
 439                       vector<string>& tokens,
 440                       const string& delimiters)
 441 {
 442     // Skip delimiters at beginning.
 443     string::size_type lastPos = str.find_first_not_of(delimiters, 0);
 444     // Find first "non-delimiter".
 445     string::size_type pos     = str.find_first_of(delimiters, lastPos);
 446
 447     while (string::npos != pos || string::npos != lastPos)
 448     {
 449         // Found a token, add it to the vector.
 450         tokens.push_back(str.substr(lastPos, pos - lastPos));
 451         // Skip delimiters.  Note the "not_of"
 452         lastPos = str.find_first_not_of(delimiters, pos);
 453         // Find next "non-delimiter"
 454         pos = str.find_first_of(delimiters, lastPos);
 455     }
 456 }
 457
 458
 459 void FGTrafficManager::startXML()
 460 {
 461     //cout << "Start XML" << endl;
 462     requiredAircraft = "";
 463     homePort = "";
 464 }
 465
 466 void FGTrafficManager::endXML()
 467 {
 468     //cout << "End XML" << endl;
 469 }
 470
 471 void FGTrafficManager::startElement(const char *name,
 472                                     const XMLAttributes & atts)
 473 {
 474     const char *attval;
 475     //cout << "Start element " << name << endl;
 476     //FGTrafficManager temp;
 477     //for (int i = 0; i < atts.size(); i++)
 478     //  if (string(atts.getName(i)) == string("include"))
 479     attval = atts.getValue("include");
 480     if (attval != 0) {
 481         //cout << "including " << attval << endl;
 482         SGPath path = globals->get_fg_root();
 483         path.append("/Traffic/");
 484         path.append(attval);
 485         readXML(path.str(), *this);
 486     }
 487     elementValueStack.push_back("");
 488     //  cout << "  " << atts.getName(i) << '=' << atts.getValue(i) << endl;
 489 }
 490
 491 void FGTrafficManager::endElement(const char *name)
 492 {
 493     //cout << "End element " << name << endl;
 494     const string & value = elementValueStack.back();
 495
 496     if (!strcmp(name, "model"))
 497         mdl = value;
 498     else if (!strcmp(name, "livery"))
 499         livery = value;
 500     else if (!strcmp(name, "home-port"))
 501         homePort = value;
 502     else if (!strcmp(name, "registration"))
 503         registration = value;
 504     else if (!strcmp(name, "airline"))
 505         airline = value;
 506     else if (!strcmp(name, "actype"))
 507         acType = value;
 508     else if (!strcmp(name, "required-aircraft"))
 509         requiredAircraft = value;
 510     else if (!strcmp(name, "flighttype"))
 511         flighttype = value;
 512     else if (!strcmp(name, "radius"))
 513         radius = atoi(value.c_str());
 514     else if (!strcmp(name, "offset"))
 515         offset = atoi(value.c_str());
 516     else if (!strcmp(name, "performance-class"))
 517         m_class = value;
 518     else if (!strcmp(name, "heavy")) {
 519         if (value == string("true"))
 520             heavy = true;
 521         else
 522             heavy = false;
 523     } else if (!strcmp(name, "callsign"))
 524         callsign = value;
 525     else if (!strcmp(name, "fltrules"))
 526         fltrules = value;
 527     else if (!strcmp(name, "port"))
 528         port = value;
 529     else if (!strcmp(name, "time"))
 530         timeString = value;
 531     else if (!strcmp(name, "departure")) {
 532         departurePort = port;
 533         departureTime = timeString;
 534     } else if (!strcmp(name, "cruise-alt"))
 535         cruiseAlt = atoi(value.c_str());
 536     else if (!strcmp(name, "arrival")) {
 537         arrivalPort = port;
 538         arrivalTime = timeString;
 539     } else if (!strcmp(name, "repeat"))
 540         repeat = value;
 541     else if (!strcmp(name, "flight")) {
 542         // We have loaded and parsed all the information belonging to this flight
 543         // so we temporarily store it.
 544         //cerr << "Pusing back flight " << callsign << endl;
 545         //cerr << callsign  <<  " " << fltrules     << " "<< departurePort << " " <<  arrivalPort << " "
 546         //   << cruiseAlt <<  " " << departureTime<< " "<< arrivalTime   << " " << repeat << endl;
 547
 548         //Prioritize aircraft
 549         string apt = fgGetString("/sim/presets/airport-id");
 550         //cerr << "Airport information: " << apt << " " << departurePort << " " << arrivalPort << endl;
 551         //if (departurePort == apt) score++;
 552         //flights.push_back(new FGScheduledFlight(callsign,
 553         //                                fltrules,
 554         //                                departurePort,
 555         //                                arrivalPort,
 556         //                                cruiseAlt,
 557         //                                departureTime,
 558         //                                arrivalTime,
 559         //                                repeat));
 560         if (requiredAircraft == "") {
 561             char buffer[16];
 562             snprintf(buffer, 16, "%d", acCounter);
 563             requiredAircraft = buffer;
 564         }
 565         SG_LOG(SG_GENERAL, SG_DEBUG, "Adding flight: " << callsign << " "
 566                << fltrules << " "
 567                << departurePort << " "
 568                << arrivalPort << " "
 569                << cruiseAlt << " "
 570                << departureTime << " "
 571                << arrivalTime << " " << repeat << " " << requiredAircraft);
 572         // For database maintainance purposes, it may be convenient to
 573         //
 574         if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 575              SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump FLIGHT," << callsign << ","
 576                           << fltrules << ","
 577                           << departurePort << ","
 578                           << arrivalPort << ","
 579                           << cruiseAlt << ","
 580                           << departureTime << ","
 581                           << arrivalTime << "," << repeat << "," << requiredAircraft);
 582         }
 583         flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 584                                                                   fltrules,
 585                                                                   departurePort,
 586                                                                   arrivalPort,
 587                                                                   cruiseAlt,
 588                                                                   departureTime,
 589                                                                   arrivalTime,
 590                                                                   repeat,
 591                                                                   requiredAircraft));
 592         requiredAircraft = "";
 593     } else if (!strcmp(name, "aircraft")) {
 594         string isHeavy;
 595         if (heavy) {
 596             isHeavy = "true";
 597         } else {
 598             isHeavy = "false";
 599         }
 600         /*
 601         cerr << "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 602              << "," << acType << "," << livery << ","
 603              << airline << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl << endl;*/
 604         int proportion =
 605             (int) (fgGetDouble("/sim/traffic-manager/proportion") * 100);
 606         int randval = rand() & 100;
 607         if (randval <= proportion) {
 608             if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 609                 SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 610                  << "," << acType << "," << livery << ","
 611                  << airline << ","  << m_class << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl);
 612             }
 613             //scheduledAircraft.push_back(new FGAISchedule(mdl,
 614             //                                     livery,
 615             //                                     registration,
 616             //                                     heavy,
 617             //                                     acType,
 618             //                                     airline,
 619             //                                     m_class,
 620             //                                     flighttype,
 621             //                                     radius,
 622             //                                     offset,
 623             //                                     score,
 624             //                                     flights));
 625             if (requiredAircraft == "") {
 626                 char buffer[16];
 627                 snprintf(buffer, 16, "%d", acCounter);
 628                 requiredAircraft = buffer;
 629             }
 630             if (homePort == "") {
 631                 homePort = departurePort;
 632             }
 633             scheduledAircraft.push_back(new FGAISchedule(mdl,
 634                                                          livery,
 635                                                          homePort,
 636                                                          registration,
 637                                                          requiredAircraft,
 638                                                          heavy,
 639                                                          acType,
 640                                                          airline,
 641                                                          m_class,
 642                                                          flighttype,
 643                                                          radius, offset));
 644
 645             //  while(flights.begin() != flights.end()) {
 646 //      flights.pop_back();
 647 //       }
 648         } else {
 649             cerr << "Skipping : " << randval;
 650         }
 651         acCounter++;
 652         requiredAircraft = "";
 653         homePort = "";
 654         //for (FGScheduledFlightVecIterator flt = flights.begin(); flt != flights.end(); flt++)
 655         //  {
 656         //    delete (*flt);
 657         //  }
 658         //flights.clear();
 659         SG_LOG(SG_GENERAL, SG_BULK, "Reading aircraft : "
 660                << registration << " with prioritization score " << score);
 661         score = 0;
 662     }
 663     elementValueStack.pop_back();
 664 }
 665
 666 void FGTrafficManager::data(const char *s, int len)
 667 {
 668     string token = string(s, len);
 669     //cout << "Character data " << string(s,len) << endl;
 670     elementValueStack.back() += token;
 671 }
 672
 673 void FGTrafficManager::pi(const char *target, const char *data)
 674 {
 675     //cout << "Processing instruction " << target << ' ' << data << endl;
 676 }
 677
 678 void FGTrafficManager::warning(const char *message, int line, int column)
 679 {
 680     SG_LOG(SG_IO, SG_WARN,
 681            "Warning: " << message << " (" << line << ',' << column << ')');
 682 }
 683
 684 void FGTrafficManager::error(const char *message, int line, int column)
 685 {
 686     SG_LOG(SG_IO, SG_ALERT,
 687            "Error: " << message << " (" << line << ',' << column << ')');
 688 }