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             cachefile << "[TrafficManagerCachedata:ref:2011:09:04]" << endl;
 113         }
 114     }
 115     for (ScheduleVectorIterator sched = scheduledAircraft.begin();
 116          sched != scheduledAircraft.end(); sched++) {
 117         if (saveData) {
 118             cachefile << (*sched)->getRegistration() << " "
 119                 << (*sched)->getRunCount() << " "
 120                 << (*sched)->getHits() << " "
 121                 << (*sched)->getLastUsed() << endl;
 122         }
 123         delete(*sched);
 124     }
 125     if (saveData) {
 126         cachefile.close();
 127     }
 128     scheduledAircraft.clear();
 129     flights.clear();
 130 }
 131
 132
 133 void FGTrafficManager::init()
 134 {
 135     if (!enabled || !aiEnabled) {
 136       return;
 137     }
 138
 139     heuristicsVector heuristics;
 140     HeuristicMap heurMap;
 141
 142     if (string(fgGetString("/sim/traffic-manager/datafile")) == string("")) {
 143         simgear::Dir trafficDir(SGPath(globals->get_fg_root(), "AI/Traffic"));
 144         simgear::PathList d = trafficDir.children(simgear::Dir::TYPE_DIR | simgear::Dir::NO_DOT_OR_DOTDOT);
 145
 146         for (unsigned int i=0; i<d.size(); ++i) {
 147           simgear::Dir d2(d[i]);
 148           simgear::PathList trafficFiles = d2.children(simgear::Dir::TYPE_FILE, ".xml");
 149           for (unsigned int j=0; j<trafficFiles.size(); ++j) {
 150             SGPath curFile = trafficFiles[j];
 151             SG_LOG(SG_GENERAL, SG_DEBUG,
 152                   "Scanning " << curFile.str() << " for traffic");
 153             readXML(curFile.str(), *this);
 154           }
 155         }
 156     } else {
 157         fgSetBool("/sim/traffic-manager/heuristics", false);
 158         SGPath path = string(fgGetString("/sim/traffic-manager/datafile"));
 159         string ext = path.extension();
 160         if (path.extension() == "xml") {
 161             if (path.exists()) {
 162                 readXML(path.str(), *this);
 163             }
 164         } else if (path.extension() == "conf") {
 165             if (path.exists()) {
 166                 readTimeTableFromFile(path);
 167             }
 168         } else {
 169              SG_LOG(SG_GENERAL, SG_ALERT,
 170                                "Unknown data format " << path.str()
 171                                 << " for traffic");
 172         }
 173         //exit(1);
 174     }
 175     if (fgGetBool("/sim/traffic-manager/heuristics")) {
 176         //cerr << "Processing Heuristics" << endl;
 177         // Load the heuristics data
 178         SGPath cacheData(fgGetString("/sim/fg-home"));
 179         cacheData.append("ai");
 180         string airport = fgGetString("/sim/presets/airport-id");
 181         if ((airport) != "") {
 182             char buffer[128];
 183             ::snprintf(buffer, 128, "%c/%c/%c/",
 184                        airport[0], airport[1], airport[2]);
 185             cacheData.append(buffer);
 186             cacheData.append(airport + "-cache.txt");
 187             string revisionStr;
 188             if (cacheData.exists()) {
 189                 ifstream data(cacheData.c_str());
 190                 data >> revisionStr;
 191                 if (revisionStr != "[TrafficManagerCachedata:ref:2011:09:04]") {
 192                     SG_LOG(SG_GENERAL, SG_ALERT,"Traffic Manager Warning: discarding outdated cachefile " <<
 193                             cacheData.c_str() << " for Airport " << airport);
 194                 } else {
 195                     while (1) {
 196                         Heuristic h; // = new Heuristic;
 197                         data >> h.registration >> h.runCount >> h.hits >> h.lastRun;
 198                         if (data.eof())
 199                             break;
 200                         HeuristicMapIterator itr = heurMap.find(h.registration);
 201                         if (itr != heurMap.end()) {
 202                              SG_LOG(SG_GENERAL, SG_WARN,"Traffic Manager Warning: found duplicate tailnumber " <<
 203                             h.registration << " for AI aircraft");
 204                         } else {
 205                             heurMap[h.registration] = h;
 206                             heuristics.push_back(h);
 207                         }
 208                     }
 209                 }
 210             }
 211         }
 212         for (currAircraft = scheduledAircraft.begin();
 213              currAircraft != scheduledAircraft.end(); currAircraft++) {
 214             string registration = (*currAircraft)->getRegistration();
 215             HeuristicMapIterator itr = heurMap.find(registration);
 216             //cerr << "Processing heuristics for" << (*currAircraft)->getRegistration() << endl;
 217             if (itr == heurMap.end()) {
 218                 //cerr << "No heuristics found for " << registration << endl;
 219             } else {
 220                 (*currAircraft)->setrunCount(itr->second.runCount);
 221                 (*currAircraft)->setHits(itr->second.hits);
 222                 (*currAircraft)->setLastUsed(itr->second.lastRun);
 223                 //cerr <<"Runcount " << itr->second.runCount << ". Hits " << itr->second.hits << ". Last run " << itr->second.lastRun<< endl;
 224             }
 225         }
 226         //cerr << "Done" << endl;
 227         //for (heuristicsVectorIterator hvi = heuristics.begin();
 228         //     hvi != heuristics.end(); hvi++) {
 229         //    delete(*hvi);
 230         //}
 231     }
 232     // Do sorting and scoring separately, to take advantage of the "homeport| variable
 233     for (currAircraft = scheduledAircraft.begin();
 234          currAircraft != scheduledAircraft.end(); currAircraft++) {
 235         (*currAircraft)->setScore();
 236     }
 237
 238     sort(scheduledAircraft.begin(), scheduledAircraft.end(),
 239          compareSchedules);
 240     currAircraft = scheduledAircraft.begin();
 241     currAircraftClosest = scheduledAircraft.begin();
 242     inited = true;
 243 }
 244
 245 void FGTrafficManager::update(double /*dt */ )
 246 {
 247     if (!enabled || !aiEnabled || (realWxEnabled && !metarValid)) {
 248         return;
 249     }
 250
 251     if (!inited) {
 252     // lazy-initialization, we've been enabled at run-time
 253       SG_LOG(SG_GENERAL, SG_INFO, "doing lazy-init of TrafficManager");
 254       init();
 255     }
 256
 257     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 258     if (scheduledAircraft.size() == 0) {
 259         return;
 260     }
 261
 262     SGVec3d userCart =
 263         SGVec3d::fromGeod(SGGeod::
 264                           fromDeg(fgGetDouble("/position/longitude-deg"),
 265                                   fgGetDouble("/position/latitude-deg")));
 266
 267     if (currAircraft == scheduledAircraft.end()) {
 268         currAircraft = scheduledAircraft.begin();
 269     }
 270     //cerr << "Processing << " << (*currAircraft)->getRegistration() << " with score " << (*currAircraft)->getScore() << endl;
 271     if (!((*currAircraft)->update(now, userCart))) {
 272         (*currAircraft)->taint();
 273     }
 274     currAircraft++;
 275 }
 276
 277 void FGTrafficManager::release(int id)
 278 {
 279     releaseList.push_back(id);
 280 }
 281
 282 bool FGTrafficManager::isReleased(int id)
 283 {
 284     IdListIterator i = releaseList.begin();
 285     while (i != releaseList.end()) {
 286         if ((*i) == id) {
 287             releaseList.erase(i);
 288             return true;
 289         }
 290         i++;
 291     }
 292     return false;
 293 }
 294
 295
 296 void FGTrafficManager::readTimeTableFromFile(SGPath infileName)
 297 {
 298     string model;
 299     string livery;
 300     string homePort;
 301     string registration;
 302     string flightReq;
 303     bool   isHeavy;
 304     string acType;
 305     string airline;
 306     string m_class;
 307     string FlightType;
 308     double radius;
 309     double offset;
 310
 311     char buffer[256];
 312     string buffString;
 313     vector <string> tokens, depTime,arrTime;
 314     vector <string>::iterator it;
 315     ifstream infile(infileName.str().c_str());
 316     while (1) {
 317          infile.getline(buffer, 256);
 318          if (infile.eof()) {
 319              break;
 320          }
 321          //cerr << "Read line : " << buffer << endl;
 322          buffString = string(buffer);
 323          tokens.clear();
 324          Tokenize(buffString, tokens, " \t");
 325          //for (it = tokens.begin(); it != tokens.end(); it++) {
 326          //    cerr << "Tokens: " << *(it) << endl;
 327          //}
 328          //cerr << endl;
 329          if (!tokens.empty()) {
 330              if (tokens[0] == string("AC")) {
 331                  if (tokens.size() != 13) {
 332                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 333                      exit(1);
 334                  }
 335                  model          = tokens[12];
 336                  livery         = tokens[6];
 337                  homePort       = tokens[1];
 338                  registration   = tokens[2];
 339                  if (tokens[11] == string("false")) {
 340                      isHeavy = false;
 341                  } else {
 342                      isHeavy = true;
 343                  }
 344                  acType         = tokens[4];
 345                  airline        = tokens[5];
 346                  flightReq      = tokens[3] + tokens[5];
 347                  m_class        = tokens[10];
 348                  FlightType     = tokens[9];
 349                  radius         = atof(tokens[8].c_str());
 350                  offset         = atof(tokens[7].c_str());;
 351                  SG_LOG(SG_GENERAL, SG_ALERT, "Adding Aircraft" << model << " " << livery << " " << homePort << " "
 352                                                                 << registration << " " << flightReq << " " << isHeavy
 353                                                                 << " " << acType << " " << airline << " " << m_class
 354                                                                 << " " << FlightType << " " << radius << " " << offset);
 355                  scheduledAircraft.push_back(new FGAISchedule(model,
 356                                                               livery,
 357                                                               homePort,
 358                                                               registration,
 359                                                               flightReq,
 360                                                               isHeavy,
 361                                                               acType,
 362                                                               airline,
 363                                                               m_class,
 364                                                               FlightType,
 365                                                               radius,
 366                                                               offset));
 367              }
 368              if (tokens[0] == string("FLIGHT")) {
 369                  //cerr << "Found flight " << buffString << " size is : " << tokens.size() << endl;
 370                  if (tokens.size() != 10) {
 371                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 372                      exit(1);
 373                  }
 374                  string callsign = tokens[1];
 375                  string fltrules = tokens[2];
 376                  string weekdays = tokens[3];
 377                  string departurePort = tokens[5];
 378                  string arrivalPort   = tokens[7];
 379                  int    cruiseAlt     = atoi(tokens[8].c_str());
 380                  string depTimeGen    = tokens[4];
 381                  string arrTimeGen    = tokens[6];
 382                  string repeat        = "WEEK";
 383                  string requiredAircraft = tokens[9];
 384
 385                  if (weekdays.size() != 7) {
 386                      SG_LOG(SG_GENERAL, SG_ALERT, "Found misconfigured weekdays string" << weekdays);
 387                      exit(1);
 388                  }
 389                  depTime.clear();
 390                  arrTime.clear();
 391                  Tokenize(depTimeGen, depTime, ":");
 392                  Tokenize(arrTimeGen, arrTime, ":");
 393                  double dep = atof(depTime[0].c_str()) + (atof(depTime[1].c_str()) / 60.0);
 394                  double arr = atof(arrTime[0].c_str()) + (atof(arrTime[1].c_str()) / 60.0);
 395                  //cerr << "Using " << dep << " " << arr << endl;
 396                  bool arrivalWeekdayNeedsIncrement = false;
 397                  if (arr < dep) {
 398                        arrivalWeekdayNeedsIncrement = true;
 399                  }
 400                  for (int i = 0; i < 7; i++) {
 401                      int j = i+1;
 402                      if (weekdays[i] != '.') {
 403                          char buffer[4];
 404                          snprintf(buffer, 4, "%d/", j);
 405                          string departureTime = string(buffer) + depTimeGen + string(":00");
 406                          string arrivalTime;
 407                          if (!arrivalWeekdayNeedsIncrement) {
 408                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 409                          }
 410                          if (arrivalWeekdayNeedsIncrement && i != 6 ) {
 411                              snprintf(buffer, 4, "%d/", j+1);
 412                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 413                          }
 414                          if (arrivalWeekdayNeedsIncrement && i == 6 ) {
 415                              snprintf(buffer, 4, "%d/", 0);
 416                              arrivalTime   = string(buffer) + arrTimeGen  + string(":00");
 417                          }
 418                          SG_LOG(SG_GENERAL, SG_ALERT, "Adding flight " << callsign       << " "
 419                                                       << fltrules       << " "
 420                                                       <<  departurePort << " "
 421                                                       <<  arrivalPort   << " "
 422                                                       <<  cruiseAlt     << " "
 423                                                       <<  departureTime << " "
 424                                                       <<  arrivalTime   << " "
 425                                                       << repeat        << " "
 426                                                       <<  requiredAircraft);
 427
 428                          flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 429                                                                  fltrules,
 430                                                                  departurePort,
 431                                                                  arrivalPort,
 432                                                                  cruiseAlt,
 433                                                                  departureTime,
 434                                                                  arrivalTime,
 435                                                                  repeat,
 436                                                                  requiredAircraft));
 437                     }
 438                 }
 439              }
 440          }
 441
 442     }
 443     //exit(1);
 444 }
 445
 446
 447 void FGTrafficManager::Tokenize(const string& str,
 448                       vector<string>& tokens,
 449                       const string& delimiters)
 450 {
 451     // Skip delimiters at beginning.
 452     string::size_type lastPos = str.find_first_not_of(delimiters, 0);
 453     // Find first "non-delimiter".
 454     string::size_type pos     = str.find_first_of(delimiters, lastPos);
 455
 456     while (string::npos != pos || string::npos != lastPos)
 457     {
 458         // Found a token, add it to the vector.
 459         tokens.push_back(str.substr(lastPos, pos - lastPos));
 460         // Skip delimiters.  Note the "not_of"
 461         lastPos = str.find_first_not_of(delimiters, pos);
 462         // Find next "non-delimiter"
 463         pos = str.find_first_of(delimiters, lastPos);
 464     }
 465 }
 466
 467
 468 void FGTrafficManager::startXML()
 469 {
 470     //cout << "Start XML" << endl;
 471     requiredAircraft = "";
 472     homePort = "";
 473 }
 474
 475 void FGTrafficManager::endXML()
 476 {
 477     //cout << "End XML" << endl;
 478 }
 479
 480 void FGTrafficManager::startElement(const char *name,
 481                                     const XMLAttributes & atts)
 482 {
 483     const char *attval;
 484     //cout << "Start element " << name << endl;
 485     //FGTrafficManager temp;
 486     //for (int i = 0; i < atts.size(); i++)
 487     //  if (string(atts.getName(i)) == string("include"))
 488     attval = atts.getValue("include");
 489     if (attval != 0) {
 490         //cout << "including " << attval << endl;
 491         SGPath path = globals->get_fg_root();
 492         path.append("/Traffic/");
 493         path.append(attval);
 494         readXML(path.str(), *this);
 495     }
 496     elementValueStack.push_back("");
 497     //  cout << "  " << atts.getName(i) << '=' << atts.getValue(i) << endl;
 498 }
 499
 500 void FGTrafficManager::endElement(const char *name)
 501 {
 502     //cout << "End element " << name << endl;
 503     const string & value = elementValueStack.back();
 504
 505     if (!strcmp(name, "model"))
 506         mdl = value;
 507     else if (!strcmp(name, "livery"))
 508         livery = value;
 509     else if (!strcmp(name, "home-port"))
 510         homePort = value;
 511     else if (!strcmp(name, "registration"))
 512         registration = value;
 513     else if (!strcmp(name, "airline"))
 514         airline = value;
 515     else if (!strcmp(name, "actype"))
 516         acType = value;
 517     else if (!strcmp(name, "required-aircraft"))
 518         requiredAircraft = value;
 519     else if (!strcmp(name, "flighttype"))
 520         flighttype = value;
 521     else if (!strcmp(name, "radius"))
 522         radius = atoi(value.c_str());
 523     else if (!strcmp(name, "offset"))
 524         offset = atoi(value.c_str());
 525     else if (!strcmp(name, "performance-class"))
 526         m_class = value;
 527     else if (!strcmp(name, "heavy")) {
 528         if (value == string("true"))
 529             heavy = true;
 530         else
 531             heavy = false;
 532     } else if (!strcmp(name, "callsign"))
 533         callsign = value;
 534     else if (!strcmp(name, "fltrules"))
 535         fltrules = value;
 536     else if (!strcmp(name, "port"))
 537         port = value;
 538     else if (!strcmp(name, "time"))
 539         timeString = value;
 540     else if (!strcmp(name, "departure")) {
 541         departurePort = port;
 542         departureTime = timeString;
 543     } else if (!strcmp(name, "cruise-alt"))
 544         cruiseAlt = atoi(value.c_str());
 545     else if (!strcmp(name, "arrival")) {
 546         arrivalPort = port;
 547         arrivalTime = timeString;
 548     } else if (!strcmp(name, "repeat"))
 549         repeat = value;
 550     else if (!strcmp(name, "flight")) {
 551         // We have loaded and parsed all the information belonging to this flight
 552         // so we temporarily store it.
 553         //cerr << "Pusing back flight " << callsign << endl;
 554         //cerr << callsign  <<  " " << fltrules     << " "<< departurePort << " " <<  arrivalPort << " "
 555         //   << cruiseAlt <<  " " << departureTime<< " "<< arrivalTime   << " " << repeat << endl;
 556
 557         //Prioritize aircraft
 558         string apt = fgGetString("/sim/presets/airport-id");
 559         //cerr << "Airport information: " << apt << " " << departurePort << " " << arrivalPort << endl;
 560         //if (departurePort == apt) score++;
 561         //flights.push_back(new FGScheduledFlight(callsign,
 562         //                                fltrules,
 563         //                                departurePort,
 564         //                                arrivalPort,
 565         //                                cruiseAlt,
 566         //                                departureTime,
 567         //                                arrivalTime,
 568         //                                repeat));
 569         if (requiredAircraft == "") {
 570             char buffer[16];
 571             snprintf(buffer, 16, "%d", acCounter);
 572             requiredAircraft = buffer;
 573         }
 574         SG_LOG(SG_GENERAL, SG_DEBUG, "Adding flight: " << callsign << " "
 575                << fltrules << " "
 576                << departurePort << " "
 577                << arrivalPort << " "
 578                << cruiseAlt << " "
 579                << departureTime << " "
 580                << arrivalTime << " " << repeat << " " << requiredAircraft);
 581         // For database maintainance purposes, it may be convenient to
 582         //
 583         if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 584              SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump FLIGHT," << callsign << ","
 585                           << fltrules << ","
 586                           << departurePort << ","
 587                           << arrivalPort << ","
 588                           << cruiseAlt << ","
 589                           << departureTime << ","
 590                           << arrivalTime << "," << repeat << "," << requiredAircraft);
 591         }
 592         flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 593                                                                   fltrules,
 594                                                                   departurePort,
 595                                                                   arrivalPort,
 596                                                                   cruiseAlt,
 597                                                                   departureTime,
 598                                                                   arrivalTime,
 599                                                                   repeat,
 600                                                                   requiredAircraft));
 601         requiredAircraft = "";
 602     } else if (!strcmp(name, "aircraft")) {
 603         string isHeavy;
 604         if (heavy) {
 605             isHeavy = "true";
 606         } else {
 607             isHeavy = "false";
 608         }
 609         /*
 610         cerr << "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 611              << "," << acType << "," << livery << ","
 612              << airline << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl << endl;*/
 613         int proportion =
 614             (int) (fgGetDouble("/sim/traffic-manager/proportion") * 100);
 615         int randval = rand() & 100;
 616         if (randval <= proportion) {
 617             if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 618                 SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 619                  << "," << acType << "," << livery << ","
 620                  << airline << ","  << m_class << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl);
 621             }
 622             //scheduledAircraft.push_back(new FGAISchedule(mdl,
 623             //                                     livery,
 624             //                                     registration,
 625             //                                     heavy,
 626             //                                     acType,
 627             //                                     airline,
 628             //                                     m_class,
 629             //                                     flighttype,
 630             //                                     radius,
 631             //                                     offset,
 632             //                                     score,
 633             //                                     flights));
 634             if (requiredAircraft == "") {
 635                 char buffer[16];
 636                 snprintf(buffer, 16, "%d", acCounter);
 637                 requiredAircraft = buffer;
 638             }
 639             if (homePort == "") {
 640                 homePort = departurePort;
 641             }
 642             scheduledAircraft.push_back(new FGAISchedule(mdl,
 643                                                          livery,
 644                                                          homePort,
 645                                                          registration,
 646                                                          requiredAircraft,
 647                                                          heavy,
 648                                                          acType,
 649                                                          airline,
 650                                                          m_class,
 651                                                          flighttype,
 652                                                          radius, offset));
 653
 654             //  while(flights.begin() != flights.end()) {
 655 //      flights.pop_back();
 656 //       }
 657         } else {
 658             cerr << "Skipping : " << randval;
 659         }
 660         acCounter++;
 661         requiredAircraft = "";
 662         homePort = "";
 663         //for (FGScheduledFlightVecIterator flt = flights.begin(); flt != flights.end(); flt++)
 664         //  {
 665         //    delete (*flt);
 666         //  }
 667         //flights.clear();
 668         SG_LOG(SG_GENERAL, SG_BULK, "Reading aircraft : "
 669                << registration << " with prioritization score " << score);
 670         score = 0;
 671     }
 672     elementValueStack.pop_back();
 673 }
 674
 675 void FGTrafficManager::data(const char *s, int len)
 676 {
 677     string token = string(s, len);
 678     //cout << "Character data " << string(s,len) << endl;
 679     elementValueStack.back() += token;
 680 }
 681
 682 void FGTrafficManager::pi(const char *target, const char *data)
 683 {
 684     //cout << "Processing instruction " << target << ' ' << data << endl;
 685 }
 686
 687 void FGTrafficManager::warning(const char *message, int line, int column)
 688 {
 689     SG_LOG(SG_IO, SG_WARN,
 690            "Warning: " << message << " (" << line << ',' << column << ')');
 691 }
 692
 693 void FGTrafficManager::error(const char *message, int line, int column)
 694 {
 695     SG_LOG(SG_IO, SG_ALERT,
 696            "Error: " << message << " (" << line << ',' << column << ')');
 697 }