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 <plib/ul.h>
  55
  56 #include <simgear/compiler.h>
  57 #include <simgear/misc/sg_path.hxx>
  58 #include <simgear/props/props.hxx>
  59 #include <simgear/route/waypoint.hxx>
  60 #include <simgear/structure/subsystem_mgr.hxx>
  61 #include <simgear/xml/easyxml.hxx>
  62
  63 #include <AIModel/AIAircraft.hxx>
  64 #include <AIModel/AIFlightPlan.hxx>
  65 #include <AIModel/AIBase.hxx>
  66 #include <Airports/simple.hxx>
  67 #include <Main/fg_init.hxx>
  68
  69
  70
  71 #include "TrafficMgr.hxx"
  72
  73 using std::sort;
  74 using std::strcmp;
  75
  76 /******************************************************************************
  77  * TrafficManager
  78  *****************************************************************************/
  79 FGTrafficManager::FGTrafficManager()
  80 {
  81     //score = 0;
  82     //runCount = 0;
  83     acCounter = 0;
  84 }
  85
  86 FGTrafficManager::~FGTrafficManager()
  87 {
  88     // Save the heuristics data
  89     bool saveData = false;
  90     ofstream cachefile;
  91     if (fgGetBool("/sim/traffic-manager/heuristics")) {
  92         SGPath cacheData(fgGetString("/sim/fg-home"));
  93         cacheData.append("ai");
  94         string airport = fgGetString("/sim/presets/airport-id");
  95
  96         if ((airport) != "") {
  97             char buffer[128];
  98             ::snprintf(buffer, 128, "%c/%c/%c/",
  99                        airport[0], airport[1], airport[2]);
 100             cacheData.append(buffer);
 101             if (!cacheData.exists()) {
 102                 cacheData.create_dir(0777);
 103             }
 104             cacheData.append(airport + "-cache.txt");
 105             //cerr << "Saving AI traffic heuristics" << endl;
 106             saveData = true;
 107             cachefile.open(cacheData.str().c_str());
 108         }
 109     }
 110     for (ScheduleVectorIterator sched = scheduledAircraft.begin();
 111          sched != scheduledAircraft.end(); sched++) {
 112         if (saveData) {
 113             cachefile << (*sched)->getRegistration() << " "
 114                 << (*sched)->getRunCount() << " "
 115                 << (*sched)->getHits() << endl;
 116         }
 117         delete(*sched);
 118     }
 119     if (saveData) {
 120         cachefile.close();
 121     }
 122     scheduledAircraft.clear();
 123     flights.clear();
 124 }
 125
 126
 127 void FGTrafficManager::init()
 128 {
 129     ulDir *d, *d2;
 130     ulDirEnt *dent, *dent2;
 131
 132     heuristicsVector heuristics;
 133     HeuristicMap heurMap;
 134
 135     if (string(fgGetString("/sim/traffic-manager/datafile")) == string("")) {
 136         SGPath aircraftDir = globals->get_fg_root();
 137         SGPath path = aircraftDir;
 138
 139         aircraftDir.append("AI/Traffic");
 140         if ((d = ulOpenDir(aircraftDir.c_str())) != NULL) {
 141             while ((dent = ulReadDir(d)) != NULL) {
 142                 if (string(dent->d_name) != string(".") &&
 143                     string(dent->d_name) != string("..") && dent->d_isdir) {
 144                     SGPath currACDir = aircraftDir;
 145                     currACDir.append(dent->d_name);
 146                     if ((d2 = ulOpenDir(currACDir.c_str())) == NULL)
 147                         return;
 148                     while ((dent2 = ulReadDir(d2)) != NULL) {
 149                         SGPath currFile = currACDir;
 150                         currFile.append(dent2->d_name);
 151                         if (currFile.extension() == string("xml")) {
 152                             SGPath currFile = currACDir;
 153                             currFile.append(dent2->d_name);
 154                             SG_LOG(SG_GENERAL, SG_DEBUG,
 155                                    "Scanning " << currFile.
 156                                    str() << " for traffic");
 157                             readXML(currFile.str(), *this);
 158                         }
 159                     }
 160                     ulCloseDir(d2);
 161                 }
 162             }
 163             ulCloseDir(d);
 164         }
 165     } else {
 166         fgSetBool("/sim/traffic-manager/heuristics", false);
 167         SGPath path = string(fgGetString("/sim/traffic-manager/datafile"));
 168         string ext = path.extension();
 169         if (path.extension() == "xml") {
 170             if (path.exists()) {
 171                 readXML(path.str(), *this);
 172             }
 173         } else if (path.extension() == "conf") {
 174             if (path.exists()) {
 175                 readTimeTableFromFile(path);
 176             }
 177         } else {
 178              SG_LOG(SG_GENERAL, SG_ALERT,
 179                                "Unknown data format " << path.str()
 180                                 << " for traffic");
 181         }
 182         //exit(1);
 183     }
 184     if (fgGetBool("/sim/traffic-manager/heuristics")) {
 185         //cerr << "Processing Heuristics" << endl;
 186         // Load the heuristics data
 187         SGPath cacheData(fgGetString("/sim/fg-home"));
 188         cacheData.append("ai");
 189         string airport = fgGetString("/sim/presets/airport-id");
 190         if ((airport) != "") {
 191             char buffer[128];
 192             ::snprintf(buffer, 128, "%c/%c/%c/",
 193                        airport[0], airport[1], airport[2]);
 194             cacheData.append(buffer);
 195             cacheData.append(airport + "-cache.txt");
 196             if (cacheData.exists()) {
 197                 ifstream data(cacheData.c_str());
 198                 while (1) {
 199                     Heuristic h; // = new Heuristic;
 200                     data >> h.registration >> h.runCount >> h.hits;
 201                     if (data.eof())
 202                         break;
 203                     HeuristicMapIterator itr = heurMap.find(h.registration);
 204                     if (itr != heurMap.end()) {
 205                          SG_LOG(SG_GENERAL, SG_WARN,"Traffic Manager Warning: found duplicate tailnumber " <<
 206                          h.registration << " for AI aircraft");
 207                     }
 208                     heurMap[h.registration] = h;
 209                     heuristics.push_back(h);
 210                 }
 211             }
 212         }
 213         for (currAircraft = scheduledAircraft.begin();
 214              currAircraft != scheduledAircraft.end(); currAircraft++) {
 215             string registration = (*currAircraft)->getRegistration();
 216             HeuristicMapIterator itr = heurMap.find(registration);
 217             //cerr << "Processing heuristics for" << (*currAircraft)->getRegistration() << endl;
 218             if (itr == heurMap.end()) {
 219                 //cerr << "No heuristics found for " << registration << endl;
 220             } else {
 221                 (*currAircraft)->setrunCount(itr->second.runCount);
 222                 (*currAircraft)->setHits(itr->second.hits);
 223                 //cerr <<"Runcount " << itr->second->runCount << ".Hits " << itr->second->hits << 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     sort(scheduledAircraft.begin(), scheduledAircraft.end(),
 238          compareSchedules);
 239     currAircraft = scheduledAircraft.begin();
 240     currAircraftClosest = scheduledAircraft.begin();
 241 }
 242
 243 void FGTrafficManager::update(double /*dt */ )
 244 {
 245     if (fgGetBool("/environment/metar/valid") == false) {
 246         return;
 247     }
 248     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 249     if (scheduledAircraft.size() == 0) {
 250         return;
 251     }
 252
 253     SGVec3d userCart =
 254         SGVec3d::fromGeod(SGGeod::
 255                           fromDeg(fgGetDouble("/position/longitude-deg"),
 256                                   fgGetDouble("/position/latitude-deg")));
 257
 258     if (currAircraft == scheduledAircraft.end()) {
 259         currAircraft = scheduledAircraft.begin();
 260     }
 261     //cerr << "Processing << " << (*currAircraft)->getRegistration() << " with score " << (*currAircraft)->getScore() << endl;
 262     if (!((*currAircraft)->update(now, userCart))) {
 263         // NOTE: With traffic manager II, this statement below is no longer true
 264         // after proper initialization, we shouldnt get here.
 265         // But let's make sure
 266         //SG_LOG( SG_GENERAL, SG_ALERT, "Failed to update aircraft schedule in traffic manager");
 267     }
 268     currAircraft++;
 269 }
 270
 271 void FGTrafficManager::release(int id)
 272 {
 273     releaseList.push_back(id);
 274 }
 275
 276 bool FGTrafficManager::isReleased(int id)
 277 {
 278     IdListIterator i = releaseList.begin();
 279     while (i != releaseList.end()) {
 280         if ((*i) == id) {
 281             releaseList.erase(i);
 282             return true;
 283         }
 284         i++;
 285     }
 286     return false;
 287 }
 288
 289
 290 void FGTrafficManager::readTimeTableFromFile(SGPath infileName)
 291 {
 292     string model;
 293     string livery;
 294     string homePort;
 295     string registration;
 296     string flightReq;
 297     bool   isHeavy;
 298     string acType;
 299     string airline;
 300     string m_class;
 301     string FlightType;
 302     double radius;
 303     double offset;
 304
 305     char buffer[256];
 306     string buffString;
 307     vector <string> tokens, depTime,arrTime;
 308     vector <string>::iterator it;
 309     ifstream infile(infileName.str().c_str());
 310     while (1) {
 311          infile.getline(buffer, 256);
 312          if (infile.eof()) {
 313              break;
 314          }
 315          //cerr << "Read line : " << buffer << endl;
 316          buffString = string(buffer);
 317          tokens.clear();
 318          Tokenize(buffString, tokens, " \t");
 319          //for (it = tokens.begin(); it != tokens.end(); it++) {
 320          //    cerr << "Tokens: " << *(it) << endl;
 321          //}
 322          //cerr << endl;
 323          if (!tokens.empty()) {
 324              if (tokens[0] == string("AC")) {
 325                  if (tokens.size() != 13) {
 326                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 327                      exit(1);
 328                  }
 329                  model          = tokens[12];
 330                  livery         = tokens[6];
 331                  homePort       = tokens[1];
 332                  registration   = tokens[2];
 333                  if (tokens[11] == string("false")) {
 334                      isHeavy = false;
 335                  } else {
 336                      isHeavy = true;
 337                  }
 338                  acType         = tokens[4];
 339                  airline        = tokens[5];
 340                  flightReq      = tokens[3] + tokens[5];
 341                  m_class        = tokens[10];
 342                  FlightType     = tokens[9];
 343                  radius         = atof(tokens[8].c_str());
 344                  offset         = atof(tokens[7].c_str());;
 345                  SG_LOG(SG_GENERAL, SG_ALERT, "Adding Aircraft" << model << " " << livery << " " << homePort << " "
 346                                                                 << registration << " " << flightReq << " " << isHeavy
 347                                                                 << " " << acType << " " << airline << " " << m_class
 348                                                                 << " " << FlightType << " " << radius << " " << offset);
 349                  scheduledAircraft.push_back(new FGAISchedule(model,
 350                                                               livery,
 351                                                               homePort,
 352                                                               registration,
 353                                                               flightReq,
 354                                                               isHeavy,
 355                                                               acType,
 356                                                               airline,
 357                                                               m_class,
 358                                                               FlightType,
 359                                                               radius,
 360                                                               offset));
 361              }
 362              if (tokens[0] == string("FLIGHT")) {
 363                  //cerr << "Found flight " << buffString << " size is : " << tokens.size() << endl;
 364                  if (tokens.size() != 10) {
 365                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 366                      exit(1);
 367                  }
 368                  string callsign = tokens[1];
 369                  string fltrules = tokens[2];
 370                  string weekdays = tokens[3];
 371                  string departurePort = tokens[5];
 372                  string arrivalPort   = tokens[7];
 373                  int    cruiseAlt     = atoi(tokens[8].c_str());
 374                  string depTimeGen    = tokens[4];
 375                  string arrTimeGen    = tokens[6];
 376                  string repeat        = "WEEK";
 377                  string requiredAircraft = tokens[9];
 378
 379                  if (weekdays.size() != 7) {
 380                      SG_LOG(SG_GENERAL, SG_ALERT, "Found misconfigured weekdays string" << weekdays);
 381                      exit(1);
 382                  }
 383                  depTime.clear();
 384                  arrTime.clear();
 385                  Tokenize(depTimeGen, depTime, ":");
 386                  Tokenize(arrTimeGen, arrTime, ":");
 387                  double dep = atof(depTime[0].c_str()) + (atof(depTime[1].c_str()) / 60.0);
 388                  double arr = atof(arrTime[0].c_str()) + (atof(arrTime[1].c_str()) / 60.0);
 389                  //cerr << "Using " << dep << " " << arr << endl;
 390                  bool arrivalWeekdayNeedsIncrement = false;
 391                  if (arr < dep) {
 392                        arrivalWeekdayNeedsIncrement = true;
 393                  }
 394                  for (int i = 0; i < 7; i++) {
 395                      int j = i+1;
 396                      if (weekdays[i] != '.') {
 397                          char buffer[4];
 398                          snprintf(buffer, 4, "%d/", j);
 399                          string departureTime = string(buffer) + depTimeGen + string(":00");
 400                          string arrivalTime;
 401                          if (!arrivalWeekdayNeedsIncrement) {
 402                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 403                          }
 404                          if (arrivalWeekdayNeedsIncrement && i != 6 ) {
 405                              snprintf(buffer, 4, "%d/", j+1);
 406                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 407                          }
 408                          if (arrivalWeekdayNeedsIncrement && i == 6 ) {
 409                              snprintf(buffer, 4, "%d/", 0);
 410                              arrivalTime   = string(buffer) + arrTimeGen  + string(":00");
 411                          }
 412                          SG_LOG(SG_GENERAL, SG_ALERT, "Adding flight " << callsign       << " "
 413                                                       << fltrules       << " "
 414                                                       <<  departurePort << " "
 415                                                       <<  arrivalPort   << " "
 416                                                       <<  cruiseAlt     << " "
 417                                                       <<  departureTime << " "
 418                                                       <<  arrivalTime   << " "
 419                                                       << repeat        << " "
 420                                                       <<  requiredAircraft);
 421
 422                          flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 423                                                                  fltrules,
 424                                                                  departurePort,
 425                                                                  arrivalPort,
 426                                                                  cruiseAlt,
 427                                                                  departureTime,
 428                                                                  arrivalTime,
 429                                                                  repeat,
 430                                                                  requiredAircraft));
 431                     }
 432                 }
 433              }
 434          }
 435
 436     }
 437     //exit(1);
 438 }
 439
 440
 441 void FGTrafficManager::Tokenize(const string& str,
 442                       vector<string>& tokens,
 443                       const string& delimiters)
 444 {
 445     // Skip delimiters at beginning.
 446     string::size_type lastPos = str.find_first_not_of(delimiters, 0);
 447     // Find first "non-delimiter".
 448     string::size_type pos     = str.find_first_of(delimiters, lastPos);
 449
 450     while (string::npos != pos || string::npos != lastPos)
 451     {
 452         // Found a token, add it to the vector.
 453         tokens.push_back(str.substr(lastPos, pos - lastPos));
 454         // Skip delimiters.  Note the "not_of"
 455         lastPos = str.find_first_not_of(delimiters, pos);
 456         // Find next "non-delimiter"
 457         pos = str.find_first_of(delimiters, lastPos);
 458     }
 459 }
 460
 461
 462 void FGTrafficManager::startXML()
 463 {
 464     //cout << "Start XML" << endl;
 465     requiredAircraft = "";
 466     homePort = "";
 467 }
 468
 469 void FGTrafficManager::endXML()
 470 {
 471     //cout << "End XML" << endl;
 472 }
 473
 474 void FGTrafficManager::startElement(const char *name,
 475                                     const XMLAttributes & atts)
 476 {
 477     const char *attval;
 478     //cout << "Start element " << name << endl;
 479     //FGTrafficManager temp;
 480     //for (int i = 0; i < atts.size(); i++)
 481     //  if (string(atts.getName(i)) == string("include"))
 482     attval = atts.getValue("include");
 483     if (attval != 0) {
 484         //cout << "including " << attval << endl;
 485         SGPath path = globals->get_fg_root();
 486         path.append("/Traffic/");
 487         path.append(attval);
 488         readXML(path.str(), *this);
 489     }
 490     elementValueStack.push_back("");
 491     //  cout << "  " << atts.getName(i) << '=' << atts.getValue(i) << endl;
 492 }
 493
 494 void FGTrafficManager::endElement(const char *name)
 495 {
 496     //cout << "End element " << name << endl;
 497     const string & value = elementValueStack.back();
 498
 499     if (!strcmp(name, "model"))
 500         mdl = value;
 501     else if (!strcmp(name, "livery"))
 502         livery = value;
 503     else if (!strcmp(name, "home-port"))
 504         homePort = value;
 505     else if (!strcmp(name, "registration"))
 506         registration = value;
 507     else if (!strcmp(name, "airline"))
 508         airline = value;
 509     else if (!strcmp(name, "actype"))
 510         acType = value;
 511     else if (!strcmp(name, "required-aircraft"))
 512         requiredAircraft = value;
 513     else if (!strcmp(name, "flighttype"))
 514         flighttype = value;
 515     else if (!strcmp(name, "radius"))
 516         radius = atoi(value.c_str());
 517     else if (!strcmp(name, "offset"))
 518         offset = atoi(value.c_str());
 519     else if (!strcmp(name, "performance-class"))
 520         m_class = value;
 521     else if (!strcmp(name, "heavy")) {
 522         if (value == string("true"))
 523             heavy = true;
 524         else
 525             heavy = false;
 526     } else if (!strcmp(name, "callsign"))
 527         callsign = value;
 528     else if (!strcmp(name, "fltrules"))
 529         fltrules = value;
 530     else if (!strcmp(name, "port"))
 531         port = value;
 532     else if (!strcmp(name, "time"))
 533         timeString = value;
 534     else if (!strcmp(name, "departure")) {
 535         departurePort = port;
 536         departureTime = timeString;
 537     } else if (!strcmp(name, "cruise-alt"))
 538         cruiseAlt = atoi(value.c_str());
 539     else if (!strcmp(name, "arrival")) {
 540         arrivalPort = port;
 541         arrivalTime = timeString;
 542     } else if (!strcmp(name, "repeat"))
 543         repeat = value;
 544     else if (!strcmp(name, "flight")) {
 545         // We have loaded and parsed all the information belonging to this flight
 546         // so we temporarily store it.
 547         //cerr << "Pusing back flight " << callsign << endl;
 548         //cerr << callsign  <<  " " << fltrules     << " "<< departurePort << " " <<  arrivalPort << " "
 549         //   << cruiseAlt <<  " " << departureTime<< " "<< arrivalTime   << " " << repeat << endl;
 550
 551         //Prioritize aircraft
 552         string apt = fgGetString("/sim/presets/airport-id");
 553         //cerr << "Airport information: " << apt << " " << departurePort << " " << arrivalPort << endl;
 554         //if (departurePort == apt) score++;
 555         //flights.push_back(new FGScheduledFlight(callsign,
 556         //                                fltrules,
 557         //                                departurePort,
 558         //                                arrivalPort,
 559         //                                cruiseAlt,
 560         //                                departureTime,
 561         //                                arrivalTime,
 562         //                                repeat));
 563         if (requiredAircraft == "") {
 564             char buffer[16];
 565             snprintf(buffer, 16, "%d", acCounter);
 566             requiredAircraft = buffer;
 567         }
 568         SG_LOG(SG_GENERAL, SG_DEBUG, "Adding flight: " << callsign << " "
 569                << fltrules << " "
 570                << departurePort << " "
 571                << arrivalPort << " "
 572                << cruiseAlt << " "
 573                << departureTime << " "
 574                << arrivalTime << " " << repeat << " " << requiredAircraft);
 575         // For database maintainance purposes, it may be convenient to
 576         //
 577         if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 578              SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump FLIGHT," << callsign << ","
 579                           << fltrules << ","
 580                           << departurePort << ","
 581                           << arrivalPort << ","
 582                           << cruiseAlt << ","
 583                           << departureTime << ","
 584                           << arrivalTime << "," << repeat << "," << requiredAircraft);
 585         }
 586         flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 587                                                                   fltrules,
 588                                                                   departurePort,
 589                                                                   arrivalPort,
 590                                                                   cruiseAlt,
 591                                                                   departureTime,
 592                                                                   arrivalTime,
 593                                                                   repeat,
 594                                                                   requiredAircraft));
 595         requiredAircraft = "";
 596     } else if (!strcmp(name, "aircraft")) {
 597         string isHeavy;
 598         if (heavy) {
 599             isHeavy = "true";
 600         } else {
 601             isHeavy = "false";
 602         }
 603         /*
 604         cerr << "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 605              << "," << acType << "," << livery << ","
 606              << airline << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl << endl;*/
 607         int proportion =
 608             (int) (fgGetDouble("/sim/traffic-manager/proportion") * 100);
 609         int randval = rand() & 100;
 610         if (randval <= proportion) {
 611             if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 612                 SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 613                  << "," << acType << "," << livery << ","
 614                  << airline << ","  << m_class << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl);
 615             }
 616             //scheduledAircraft.push_back(new FGAISchedule(mdl,
 617             //                                     livery,
 618             //                                     registration,
 619             //                                     heavy,
 620             //                                     acType,
 621             //                                     airline,
 622             //                                     m_class,
 623             //                                     flighttype,
 624             //                                     radius,
 625             //                                     offset,
 626             //                                     score,
 627             //                                     flights));
 628             if (requiredAircraft == "") {
 629                 char buffer[16];
 630                 snprintf(buffer, 16, "%d", acCounter);
 631                 requiredAircraft = buffer;
 632             }
 633             if (homePort == "") {
 634                 homePort = departurePort;
 635             }
 636             scheduledAircraft.push_back(new FGAISchedule(mdl,
 637                                                          livery,
 638                                                          homePort,
 639                                                          registration,
 640                                                          requiredAircraft,
 641                                                          heavy,
 642                                                          acType,
 643                                                          airline,
 644                                                          m_class,
 645                                                          flighttype,
 646                                                          radius, offset));
 647
 648             //  while(flights.begin() != flights.end()) {
 649 //      flights.pop_back();
 650 //       }
 651         } else {
 652             cerr << "Skipping : " << randval;
 653         }
 654         acCounter++;
 655         requiredAircraft = "";
 656         homePort = "";
 657         //for (FGScheduledFlightVecIterator flt = flights.begin(); flt != flights.end(); flt++)
 658         //  {
 659         //    delete (*flt);
 660         //  }
 661         //flights.clear();
 662         SG_LOG(SG_GENERAL, SG_BULK, "Reading aircraft : "
 663                << registration << " with prioritization score " << score);
 664         score = 0;
 665     }
 666     elementValueStack.pop_back();
 667 }
 668
 669 void FGTrafficManager::data(const char *s, int len)
 670 {
 671     string token = string(s, len);
 672     //cout << "Character data " << string(s,len) << endl;
 673     elementValueStack.back() += token;
 674 }
 675
 676 void FGTrafficManager::pi(const char *target, const char *data)
 677 {
 678     //cout << "Processing instruction " << target << ' ' << data << endl;
 679 }
 680
 681 void FGTrafficManager::warning(const char *message, int line, int column)
 682 {
 683     SG_LOG(SG_IO, SG_WARN,
 684            "Warning: " << message << " (" << line << ',' << column << ')');
 685 }
 686
 687 void FGTrafficManager::error(const char *message, int line, int column)
 688 {
 689     SG_LOG(SG_IO, SG_ALERT,
 690            "Error: " << message << " (" << line << ',' << column << ')');
 691 }