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   realWxEnabled("/environment/realwx/enabled"),
  83   metarValid("/environment/metar/valid")
  84 {
  85     //score = 0;
  86     //runCount = 0;
  87     acCounter = 0;
  88 }
  89
  90 FGTrafficManager::~FGTrafficManager()
  91 {
  92     // Save the heuristics data
  93     bool saveData = false;
  94     ofstream cachefile;
  95     if (fgGetBool("/sim/traffic-manager/heuristics")) {
  96         SGPath cacheData(fgGetString("/sim/fg-home"));
  97         cacheData.append("ai");
  98         string airport = fgGetString("/sim/presets/airport-id");
  99
 100         if ((airport) != "") {
 101             char buffer[128];
 102             ::snprintf(buffer, 128, "%c/%c/%c/",
 103                        airport[0], airport[1], airport[2]);
 104             cacheData.append(buffer);
 105             if (!cacheData.exists()) {
 106                 cacheData.create_dir(0777);
 107             }
 108             cacheData.append(airport + "-cache.txt");
 109             //cerr << "Saving AI traffic heuristics" << endl;
 110             saveData = true;
 111             cachefile.open(cacheData.str().c_str());
 112         }
 113     }
 114     for (ScheduleVectorIterator sched = scheduledAircraft.begin();
 115          sched != scheduledAircraft.end(); sched++) {
 116         if (saveData) {
 117             cachefile << (*sched)->getRegistration() << " "
 118                 << (*sched)->getRunCount() << " "
 119                 << (*sched)->getHits() << endl;
 120         }
 121         delete(*sched);
 122     }
 123     if (saveData) {
 124         cachefile.close();
 125     }
 126     scheduledAircraft.clear();
 127     flights.clear();
 128 }
 129
 130
 131 void FGTrafficManager::init()
 132 {
 133     if (!enabled || !aiEnabled) {
 134       return;
 135     }
 136
 137     heuristicsVector heuristics;
 138     HeuristicMap heurMap;
 139
 140     if (string(fgGetString("/sim/traffic-manager/datafile")) == string("")) {
 141         simgear::Dir trafficDir(SGPath(globals->get_fg_root(), "AI/Traffic"));
 142         simgear::PathList d = trafficDir.children(simgear::Dir::TYPE_DIR | simgear::Dir::NO_DOT_OR_DOTDOT);
 143
 144         for (unsigned int i=0; i<d.size(); ++i) {
 145           simgear::Dir d2(d[i]);
 146           simgear::PathList trafficFiles = d2.children(simgear::Dir::TYPE_FILE, ".xml");
 147           for (unsigned int j=0; j<trafficFiles.size(); ++j) {
 148             SGPath curFile = trafficFiles[j];
 149             SG_LOG(SG_GENERAL, SG_DEBUG,
 150                   "Scanning " << curFile.str() << " for traffic");
 151             readXML(curFile.str(), *this);
 152           }
 153         }
 154     } else {
 155         fgSetBool("/sim/traffic-manager/heuristics", false);
 156         SGPath path = string(fgGetString("/sim/traffic-manager/datafile"));
 157         string ext = path.extension();
 158         if (path.extension() == "xml") {
 159             if (path.exists()) {
 160                 readXML(path.str(), *this);
 161             }
 162         } else if (path.extension() == "conf") {
 163             if (path.exists()) {
 164                 readTimeTableFromFile(path);
 165             }
 166         } else {
 167              SG_LOG(SG_GENERAL, SG_ALERT,
 168                                "Unknown data format " << path.str()
 169                                 << " for traffic");
 170         }
 171         //exit(1);
 172     }
 173     if (fgGetBool("/sim/traffic-manager/heuristics")) {
 174         //cerr << "Processing Heuristics" << endl;
 175         // Load the heuristics data
 176         SGPath cacheData(fgGetString("/sim/fg-home"));
 177         cacheData.append("ai");
 178         string airport = fgGetString("/sim/presets/airport-id");
 179         if ((airport) != "") {
 180             char buffer[128];
 181             ::snprintf(buffer, 128, "%c/%c/%c/",
 182                        airport[0], airport[1], airport[2]);
 183             cacheData.append(buffer);
 184             cacheData.append(airport + "-cache.txt");
 185             if (cacheData.exists()) {
 186                 ifstream data(cacheData.c_str());
 187                 while (1) {
 188                     Heuristic h; // = new Heuristic;
 189                     data >> h.registration >> h.runCount >> h.hits;
 190                     if (data.eof())
 191                         break;
 192                     HeuristicMapIterator itr = heurMap.find(h.registration);
 193                     if (itr != heurMap.end()) {
 194                          SG_LOG(SG_GENERAL, SG_WARN,"Traffic Manager Warning: found duplicate tailnumber " <<
 195                          h.registration << " for AI aircraft");
 196                     }
 197                     heurMap[h.registration] = h;
 198                     heuristics.push_back(h);
 199                 }
 200             }
 201         }
 202         for (currAircraft = scheduledAircraft.begin();
 203              currAircraft != scheduledAircraft.end(); currAircraft++) {
 204             string registration = (*currAircraft)->getRegistration();
 205             HeuristicMapIterator itr = heurMap.find(registration);
 206             //cerr << "Processing heuristics for" << (*currAircraft)->getRegistration() << endl;
 207             if (itr == heurMap.end()) {
 208                 //cerr << "No heuristics found for " << registration << endl;
 209             } else {
 210                 (*currAircraft)->setrunCount(itr->second.runCount);
 211                 (*currAircraft)->setHits(itr->second.hits);
 212                 //cerr <<"Runcount " << itr->second->runCount << ".Hits " << itr->second->hits << endl;
 213             }
 214         }
 215         //cerr << "Done" << endl;
 216         //for (heuristicsVectorIterator hvi = heuristics.begin();
 217         //     hvi != heuristics.end(); hvi++) {
 218         //    delete(*hvi);
 219         //}
 220     }
 221     // Do sorting and scoring separately, to take advantage of the "homeport| variable
 222     for (currAircraft = scheduledAircraft.begin();
 223          currAircraft != scheduledAircraft.end(); currAircraft++) {
 224         (*currAircraft)->setScore();
 225     }
 226     sort(scheduledAircraft.begin(), scheduledAircraft.end(),
 227          compareSchedules);
 228     currAircraft = scheduledAircraft.begin();
 229     currAircraftClosest = scheduledAircraft.begin();
 230
 231     inited = true;
 232 }
 233
 234 void FGTrafficManager::update(double /*dt */ )
 235 {
 236     if (!enabled || !aiEnabled || (realWxEnabled && !metarValid)) {
 237         return;
 238     }
 239
 240     if (!inited) {
 241     // lazy-initialization, we've been enabled at run-time
 242       SG_LOG(SG_GENERAL, SG_INFO, "doing lazy-init of TrafficManager");
 243       init();
 244     }
 245
 246     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 247     if (scheduledAircraft.size() == 0) {
 248         return;
 249     }
 250
 251     SGVec3d userCart =
 252         SGVec3d::fromGeod(SGGeod::
 253                           fromDeg(fgGetDouble("/position/longitude-deg"),
 254                                   fgGetDouble("/position/latitude-deg")));
 255
 256     if (currAircraft == scheduledAircraft.end()) {
 257         currAircraft = scheduledAircraft.begin();
 258     }
 259     //cerr << "Processing << " << (*currAircraft)->getRegistration() << " with score " << (*currAircraft)->getScore() << endl;
 260     if (!((*currAircraft)->update(now, userCart))) {
 261         (*currAircraft)->taint();
 262         // NOTE: With traffic manager II, this statement below is no longer true
 263         // after proper initialization, we shouldnt get here.
 264         // But let's make sure
 265         //SG_LOG( SG_GENERAL, SG_ALERT, "Failed to update aircraft schedule in traffic manager");
 266     }
 267     currAircraft++;
 268 }
 269
 270 void FGTrafficManager::release(int id)
 271 {
 272     releaseList.push_back(id);
 273 }
 274
 275 bool FGTrafficManager::isReleased(int id)
 276 {
 277     IdListIterator i = releaseList.begin();
 278     while (i != releaseList.end()) {
 279         if ((*i) == id) {
 280             releaseList.erase(i);
 281             return true;
 282         }
 283         i++;
 284     }
 285     return false;
 286 }
 287
 288
 289 void FGTrafficManager::readTimeTableFromFile(SGPath infileName)
 290 {
 291     string model;
 292     string livery;
 293     string homePort;
 294     string registration;
 295     string flightReq;
 296     bool   isHeavy;
 297     string acType;
 298     string airline;
 299     string m_class;
 300     string FlightType;
 301     double radius;
 302     double offset;
 303
 304     char buffer[256];
 305     string buffString;
 306     vector <string> tokens, depTime,arrTime;
 307     vector <string>::iterator it;
 308     ifstream infile(infileName.str().c_str());
 309     while (1) {
 310          infile.getline(buffer, 256);
 311          if (infile.eof()) {
 312              break;
 313          }
 314          //cerr << "Read line : " << buffer << endl;
 315          buffString = string(buffer);
 316          tokens.clear();
 317          Tokenize(buffString, tokens, " \t");
 318          //for (it = tokens.begin(); it != tokens.end(); it++) {
 319          //    cerr << "Tokens: " << *(it) << endl;
 320          //}
 321          //cerr << endl;
 322          if (!tokens.empty()) {
 323              if (tokens[0] == string("AC")) {
 324                  if (tokens.size() != 13) {
 325                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 326                      exit(1);
 327                  }
 328                  model          = tokens[12];
 329                  livery         = tokens[6];
 330                  homePort       = tokens[1];
 331                  registration   = tokens[2];
 332                  if (tokens[11] == string("false")) {
 333                      isHeavy = false;
 334                  } else {
 335                      isHeavy = true;
 336                  }
 337                  acType         = tokens[4];
 338                  airline        = tokens[5];
 339                  flightReq      = tokens[3] + tokens[5];
 340                  m_class        = tokens[10];
 341                  FlightType     = tokens[9];
 342                  radius         = atof(tokens[8].c_str());
 343                  offset         = atof(tokens[7].c_str());;
 344                  SG_LOG(SG_GENERAL, SG_ALERT, "Adding Aircraft" << model << " " << livery << " " << homePort << " "
 345                                                                 << registration << " " << flightReq << " " << isHeavy
 346                                                                 << " " << acType << " " << airline << " " << m_class
 347                                                                 << " " << FlightType << " " << radius << " " << offset);
 348                  scheduledAircraft.push_back(new FGAISchedule(model,
 349                                                               livery,
 350                                                               homePort,
 351                                                               registration,
 352                                                               flightReq,
 353                                                               isHeavy,
 354                                                               acType,
 355                                                               airline,
 356                                                               m_class,
 357                                                               FlightType,
 358                                                               radius,
 359                                                               offset));
 360              }
 361              if (tokens[0] == string("FLIGHT")) {
 362                  //cerr << "Found flight " << buffString << " size is : " << tokens.size() << endl;
 363                  if (tokens.size() != 10) {
 364                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 365                      exit(1);
 366                  }
 367                  string callsign = tokens[1];
 368                  string fltrules = tokens[2];
 369                  string weekdays = tokens[3];
 370                  string departurePort = tokens[5];
 371                  string arrivalPort   = tokens[7];
 372                  int    cruiseAlt     = atoi(tokens[8].c_str());
 373                  string depTimeGen    = tokens[4];
 374                  string arrTimeGen    = tokens[6];
 375                  string repeat        = "WEEK";
 376                  string requiredAircraft = tokens[9];
 377
 378                  if (weekdays.size() != 7) {
 379                      SG_LOG(SG_GENERAL, SG_ALERT, "Found misconfigured weekdays string" << weekdays);
 380                      exit(1);
 381                  }
 382                  depTime.clear();
 383                  arrTime.clear();
 384                  Tokenize(depTimeGen, depTime, ":");
 385                  Tokenize(arrTimeGen, arrTime, ":");
 386                  double dep = atof(depTime[0].c_str()) + (atof(depTime[1].c_str()) / 60.0);
 387                  double arr = atof(arrTime[0].c_str()) + (atof(arrTime[1].c_str()) / 60.0);
 388                  //cerr << "Using " << dep << " " << arr << endl;
 389                  bool arrivalWeekdayNeedsIncrement = false;
 390                  if (arr < dep) {
 391                        arrivalWeekdayNeedsIncrement = true;
 392                  }
 393                  for (int i = 0; i < 7; i++) {
 394                      int j = i+1;
 395                      if (weekdays[i] != '.') {
 396                          char buffer[4];
 397                          snprintf(buffer, 4, "%d/", j);
 398                          string departureTime = string(buffer) + depTimeGen + string(":00");
 399                          string arrivalTime;
 400                          if (!arrivalWeekdayNeedsIncrement) {
 401                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 402                          }
 403                          if (arrivalWeekdayNeedsIncrement && i != 6 ) {
 404                              snprintf(buffer, 4, "%d/", j+1);
 405                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 406                          }
 407                          if (arrivalWeekdayNeedsIncrement && i == 6 ) {
 408                              snprintf(buffer, 4, "%d/", 0);
 409                              arrivalTime   = string(buffer) + arrTimeGen  + string(":00");
 410                          }
 411                          SG_LOG(SG_GENERAL, SG_ALERT, "Adding flight " << callsign       << " "
 412                                                       << fltrules       << " "
 413                                                       <<  departurePort << " "
 414                                                       <<  arrivalPort   << " "
 415                                                       <<  cruiseAlt     << " "
 416                                                       <<  departureTime << " "
 417                                                       <<  arrivalTime   << " "
 418                                                       << repeat        << " "
 419                                                       <<  requiredAircraft);
 420
 421                          flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 422                                                                  fltrules,
 423                                                                  departurePort,
 424                                                                  arrivalPort,
 425                                                                  cruiseAlt,
 426                                                                  departureTime,
 427                                                                  arrivalTime,
 428                                                                  repeat,
 429                                                                  requiredAircraft));
 430                     }
 431                 }
 432              }
 433          }
 434
 435     }
 436     //exit(1);
 437 }
 438
 439
 440 void FGTrafficManager::Tokenize(const string& str,
 441                       vector<string>& tokens,
 442                       const string& delimiters)
 443 {
 444     // Skip delimiters at beginning.
 445     string::size_type lastPos = str.find_first_not_of(delimiters, 0);
 446     // Find first "non-delimiter".
 447     string::size_type pos     = str.find_first_of(delimiters, lastPos);
 448
 449     while (string::npos != pos || string::npos != lastPos)
 450     {
 451         // Found a token, add it to the vector.
 452         tokens.push_back(str.substr(lastPos, pos - lastPos));
 453         // Skip delimiters.  Note the "not_of"
 454         lastPos = str.find_first_not_of(delimiters, pos);
 455         // Find next "non-delimiter"
 456         pos = str.find_first_of(delimiters, lastPos);
 457     }
 458 }
 459
 460
 461 void FGTrafficManager::startXML()
 462 {
 463     //cout << "Start XML" << endl;
 464     requiredAircraft = "";
 465     homePort = "";
 466 }
 467
 468 void FGTrafficManager::endXML()
 469 {
 470     //cout << "End XML" << endl;
 471 }
 472
 473 void FGTrafficManager::startElement(const char *name,
 474                                     const XMLAttributes & atts)
 475 {
 476     const char *attval;
 477     //cout << "Start element " << name << endl;
 478     //FGTrafficManager temp;
 479     //for (int i = 0; i < atts.size(); i++)
 480     //  if (string(atts.getName(i)) == string("include"))
 481     attval = atts.getValue("include");
 482     if (attval != 0) {
 483         //cout << "including " << attval << endl;
 484         SGPath path = globals->get_fg_root();
 485         path.append("/Traffic/");
 486         path.append(attval);
 487         readXML(path.str(), *this);
 488     }
 489     elementValueStack.push_back("");
 490     //  cout << "  " << atts.getName(i) << '=' << atts.getValue(i) << endl;
 491 }
 492
 493 void FGTrafficManager::endElement(const char *name)
 494 {
 495     //cout << "End element " << name << endl;
 496     const string & value = elementValueStack.back();
 497
 498     if (!strcmp(name, "model"))
 499         mdl = value;
 500     else if (!strcmp(name, "livery"))
 501         livery = value;
 502     else if (!strcmp(name, "home-port"))
 503         homePort = value;
 504     else if (!strcmp(name, "registration"))
 505         registration = value;
 506     else if (!strcmp(name, "airline"))
 507         airline = value;
 508     else if (!strcmp(name, "actype"))
 509         acType = value;
 510     else if (!strcmp(name, "required-aircraft"))
 511         requiredAircraft = value;
 512     else if (!strcmp(name, "flighttype"))
 513         flighttype = value;
 514     else if (!strcmp(name, "radius"))
 515         radius = atoi(value.c_str());
 516     else if (!strcmp(name, "offset"))
 517         offset = atoi(value.c_str());
 518     else if (!strcmp(name, "performance-class"))
 519         m_class = value;
 520     else if (!strcmp(name, "heavy")) {
 521         if (value == string("true"))
 522             heavy = true;
 523         else
 524             heavy = false;
 525     } else if (!strcmp(name, "callsign"))
 526         callsign = value;
 527     else if (!strcmp(name, "fltrules"))
 528         fltrules = value;
 529     else if (!strcmp(name, "port"))
 530         port = value;
 531     else if (!strcmp(name, "time"))
 532         timeString = value;
 533     else if (!strcmp(name, "departure")) {
 534         departurePort = port;
 535         departureTime = timeString;
 536     } else if (!strcmp(name, "cruise-alt"))
 537         cruiseAlt = atoi(value.c_str());
 538     else if (!strcmp(name, "arrival")) {
 539         arrivalPort = port;
 540         arrivalTime = timeString;
 541     } else if (!strcmp(name, "repeat"))
 542         repeat = value;
 543     else if (!strcmp(name, "flight")) {
 544         // We have loaded and parsed all the information belonging to this flight
 545         // so we temporarily store it.
 546         //cerr << "Pusing back flight " << callsign << endl;
 547         //cerr << callsign  <<  " " << fltrules     << " "<< departurePort << " " <<  arrivalPort << " "
 548         //   << cruiseAlt <<  " " << departureTime<< " "<< arrivalTime   << " " << repeat << endl;
 549
 550         //Prioritize aircraft
 551         string apt = fgGetString("/sim/presets/airport-id");
 552         //cerr << "Airport information: " << apt << " " << departurePort << " " << arrivalPort << endl;
 553         //if (departurePort == apt) score++;
 554         //flights.push_back(new FGScheduledFlight(callsign,
 555         //                                fltrules,
 556         //                                departurePort,
 557         //                                arrivalPort,
 558         //                                cruiseAlt,
 559         //                                departureTime,
 560         //                                arrivalTime,
 561         //                                repeat));
 562         if (requiredAircraft == "") {
 563             char buffer[16];
 564             snprintf(buffer, 16, "%d", acCounter);
 565             requiredAircraft = buffer;
 566         }
 567         SG_LOG(SG_GENERAL, SG_DEBUG, "Adding flight: " << callsign << " "
 568                << fltrules << " "
 569                << departurePort << " "
 570                << arrivalPort << " "
 571                << cruiseAlt << " "
 572                << departureTime << " "
 573                << arrivalTime << " " << repeat << " " << requiredAircraft);
 574         // For database maintainance purposes, it may be convenient to
 575         //
 576         if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 577              SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump FLIGHT," << callsign << ","
 578                           << fltrules << ","
 579                           << departurePort << ","
 580                           << arrivalPort << ","
 581                           << cruiseAlt << ","
 582                           << departureTime << ","
 583                           << arrivalTime << "," << repeat << "," << requiredAircraft);
 584         }
 585         flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 586                                                                   fltrules,
 587                                                                   departurePort,
 588                                                                   arrivalPort,
 589                                                                   cruiseAlt,
 590                                                                   departureTime,
 591                                                                   arrivalTime,
 592                                                                   repeat,
 593                                                                   requiredAircraft));
 594         requiredAircraft = "";
 595     } else if (!strcmp(name, "aircraft")) {
 596         string isHeavy;
 597         if (heavy) {
 598             isHeavy = "true";
 599         } else {
 600             isHeavy = "false";
 601         }
 602         /*
 603         cerr << "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 604              << "," << acType << "," << livery << ","
 605              << airline << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl << endl;*/
 606         int proportion =
 607             (int) (fgGetDouble("/sim/traffic-manager/proportion") * 100);
 608         int randval = rand() & 100;
 609         if (randval <= proportion) {
 610             if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 611                 SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 612                  << "," << acType << "," << livery << ","
 613                  << airline << ","  << m_class << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl);
 614             }
 615             //scheduledAircraft.push_back(new FGAISchedule(mdl,
 616             //                                     livery,
 617             //                                     registration,
 618             //                                     heavy,
 619             //                                     acType,
 620             //                                     airline,
 621             //                                     m_class,
 622             //                                     flighttype,
 623             //                                     radius,
 624             //                                     offset,
 625             //                                     score,
 626             //                                     flights));
 627             if (requiredAircraft == "") {
 628                 char buffer[16];
 629                 snprintf(buffer, 16, "%d", acCounter);
 630                 requiredAircraft = buffer;
 631             }
 632             if (homePort == "") {
 633                 homePort = departurePort;
 634             }
 635             scheduledAircraft.push_back(new FGAISchedule(mdl,
 636                                                          livery,
 637                                                          homePort,
 638                                                          registration,
 639                                                          requiredAircraft,
 640                                                          heavy,
 641                                                          acType,
 642                                                          airline,
 643                                                          m_class,
 644                                                          flighttype,
 645                                                          radius, offset));
 646
 647             //  while(flights.begin() != flights.end()) {
 648 //      flights.pop_back();
 649 //       }
 650         } else {
 651             cerr << "Skipping : " << randval;
 652         }
 653         acCounter++;
 654         requiredAircraft = "";
 655         homePort = "";
 656         //for (FGScheduledFlightVecIterator flt = flights.begin(); flt != flights.end(); flt++)
 657         //  {
 658         //    delete (*flt);
 659         //  }
 660         //flights.clear();
 661         SG_LOG(SG_GENERAL, SG_BULK, "Reading aircraft : "
 662                << registration << " with prioritization score " << score);
 663         score = 0;
 664     }
 665     elementValueStack.pop_back();
 666 }
 667
 668 void FGTrafficManager::data(const char *s, int len)
 669 {
 670     string token = string(s, len);
 671     //cout << "Character data " << string(s,len) << endl;
 672     elementValueStack.back() += token;
 673 }
 674
 675 void FGTrafficManager::pi(const char *target, const char *data)
 676 {
 677     //cout << "Processing instruction " << target << ' ' << data << endl;
 678 }
 679
 680 void FGTrafficManager::warning(const char *message, int line, int column)
 681 {
 682     SG_LOG(SG_IO, SG_WARN,
 683            "Warning: " << message << " (" << line << ',' << column << ')');
 684 }
 685
 686 void FGTrafficManager::error(const char *message, int line, int column)
 687 {
 688     SG_LOG(SG_IO, SG_ALERT,
 689            "Error: " << message << " (" << line << ',' << column << ')');
 690 }