source/libr2c2/centralstation.cpp

   1 #include <algorithm>
   2 #include <msp/core/refptr.h>
   3 #include <msp/io/print.h>
   4 #include <msp/net/resolve.h>
   5 #include <msp/strings/utils.h>
   6 #include <msp/time/units.h>
   7 #include <msp/time/utils.h>
   8 #include "centralstation.h"
   9 #include "tracktype.h"
  10 #include "vehicletype.h"
  11
  12 using namespace std;
  13 using namespace Msp;
  14
  15 namespace R2C2 {
  16
  17 CentralStation::CentralStation(const string &host):
  18         socket(Net::INET),
  19         pending_commands(0),
  20         power(false),
  21         halted(false),
  22         locos_synced(false),
  23         accessories_synced(false),
  24         sensors_synced(false)
  25 {
  26         RefPtr<Net::SockAddr> addr = Net::resolve(host+":15471");
  27         socket.connect(*addr);
  28
  29         IO::print("Connected to central station at %s\n", addr->str());
  30
  31         command("get(1, status)");
  32         command("request(1, view)");
  33         command("queryObjects(10, addr, name)");
  34         command("queryObjects(11, addr)");
  35         command("queryObjects(26)");
  36 }
  37
  38 CentralStation::~CentralStation()
  39 {
  40         command("release(1, view)", true);
  41         for(LocoMap::iterator i=locos.begin(); (i!=locos.end() && !(i->first&0x10000)); ++i)
  42                 command(format("release(%d, view, control)", i->first));
  43         for(AccessoryMap::iterator i=accessories.begin(); (i!=accessories.end() && !(i->first&0x10000)); ++i)
  44                 command(format("release(%d, view, control)", i->first));
  45         while(IO::poll(socket, IO::P_INPUT, 100*Time::msec))
  46                 while(receive()) ;
  47 }
  48
  49 void CentralStation::set_power(bool p)
  50 {
  51         power = p;
  52         command(format("set(1, %s)", (power ? "go" : "stop")));
  53 }
  54
  55 void CentralStation::halt(bool h)
  56 {
  57         halted = h;
  58         if(halted)
  59         {
  60                 for(LocoMap::iterator i=locos.begin(); i!=locos.end(); ++i)
  61                         if(i->second.speed)
  62                                 set_loco_speed(i->first, 0);
  63         }
  64
  65         signal_halt.emit(halted);
  66 }
  67
  68 const char *CentralStation::enumerate_protocols(unsigned index) const
  69 {
  70         if(index==MM)
  71                 return "MM";
  72         else if(index==MM_27)
  73                 return "MM-27";
  74         else if(index==MFX)
  75                 return "MFX";
  76         else
  77                 return 0;
  78 }
  79
  80 unsigned CentralStation::get_protocol_speed_steps(const string &name) const
  81 {
  82         switch(map_protocol(name))
  83         {
  84         case MM: return 14;
  85         case MM_27: return 27;
  86         case MFX: return 126;
  87         default: return 0;
  88         }
  89 }
  90
  91 void CentralStation::add_loco(unsigned addr, const string &proto_name, const VehicleType &type)
  92 {
  93         Protocol proto = map_protocol(proto_name);
  94
  95         unsigned id = map_address(locos, loco_addr, addr);
  96         if(!id)
  97         {
  98                 Locomotive &loco = locos[addr|0x10000];
  99                 loco.name = type.get_name();
 100                 loco.protocol = proto;
 101                 loco.address = addr;
 102
 103                 const VehicleType::FunctionMap &type_funcs = type.get_functions();
 104                 for(VehicleType::FunctionMap::const_iterator i=type_funcs.begin(); i!=type_funcs.end(); ++i)
 105                         loco.func_mask |= 1<<i->first;
 106
 107                 if(locos_synced && proto!=MFX)
 108                         command("create(10)");
 109         }
 110         else
 111                 command(format("request(%d, view, control, force)", id));
 112 }
 113
 114 void CentralStation::set_loco_speed(unsigned addr, unsigned speed)
 115 {
 116         if(speed && halted)
 117                 return;
 118
 119         unsigned id = map_address(locos, loco_addr, addr);
 120         if(id)
 121         {
 122                 Locomotive &loco = locos[id];
 123                 if(loco.protocol==MFX && speed)
 124                         ++speed;
 125                 command(format("set(%d, speedstep[%d])", id, speed));
 126         }
 127 }
 128
 129 void CentralStation::set_loco_reverse(unsigned addr, bool rev)
 130 {
 131         unsigned id = map_address(locos, loco_addr, addr);
 132         if(id)
 133                 command(format("set(%d, dir[%d])", id, rev));
 134 }
 135
 136 void CentralStation::set_loco_function(unsigned addr, unsigned func, bool state)
 137 {
 138         unsigned id = map_address(locos, loco_addr, addr);
 139         if(id)
 140                 command(format("set(%d, func[%d, %d])", id, func, state));
 141 }
 142
 143 void CentralStation::add_turnout(unsigned addr, const TrackType &type)
 144 {
 145         unsigned straight = type.get_paths();
 146         bool left = false;
 147         bool right = false;
 148         bool cross = false;
 149
 150         const vector<TrackPart> &parts = type.get_parts();
 151         for(vector<TrackPart>::const_iterator i=parts.begin(); i!=parts.end(); ++i)
 152         {
 153                 TrackPoint start = i->get_point(0);
 154                 TrackPoint end = i->get_point(i->get_length());
 155                 if(end.dir>start.dir+0.01 || end.dir<start.dir-0.01)
 156                 {
 157                         (end.dir>start.dir ? left : right) = true;
 158                         straight &= ~(1<<i->get_path());
 159                 }
 160                 else if(start.dir<-0.01 || start.dir>0.01)
 161                         cross = true;
 162         }
 163
 164         MagnetAccessory::Symbol symbol = MagnetAccessory::TURNOUT_LEFT;
 165         if(cross)
 166                 symbol = MagnetAccessory::TURNOUT_DOUBLESLIP;
 167         else if(left && right)
 168                 symbol = MagnetAccessory::TURNOUT_THREEWAY;
 169         else if(left)
 170                 symbol = (straight ? MagnetAccessory::TURNOUT_LEFT : MagnetAccessory::TURNOUT_CURVED_LEFT);
 171         else if(right)
 172                 symbol = (straight ? MagnetAccessory::TURNOUT_RIGHT : MagnetAccessory::TURNOUT_CURVED_RIGHT);
 173
 174         MagnetAccessory &turnout = add_accessory(addr, MagnetAccessory::TURNOUT, symbol);
 175         turnout.bits = type.get_state_bits();
 176 }
 177
 178 void CentralStation::set_turnout(unsigned addr, unsigned state)
 179 {
 180         set_accessory_state(addr, MagnetAccessory::TURNOUT, state);
 181 }
 182
 183 unsigned CentralStation::get_turnout(unsigned addr) const
 184 {
 185         return get_accessory_state(addr, MagnetAccessory::TURNOUT);
 186 }
 187
 188 CentralStation::MagnetAccessory &CentralStation::add_accessory(unsigned addr, MagnetAccessory::Type type, MagnetAccessory::Symbol symbol)
 189 {
 190         unsigned id = map_address(accessories, accessory_addr, addr);
 191         if(!id)
 192         {
 193                 id = addr|0x10000;
 194
 195                 MagnetAccessory &accessory = accessories[id];
 196                 accessory.address = addr;
 197                 accessory.type = type;
 198                 accessory.symbol = symbol;
 199
 200                 accessory_addr[addr] = id;
 201
 202                 if(accessories_synced)
 203                         command("create(11, append)");
 204
 205                 return accessory;
 206         }
 207         else
 208         {
 209                 MagnetAccessory &accessory = accessories[id];
 210                 command(format("request(%d, view, control)", id));
 211                 if(accessory.symbol!=symbol)
 212                         command(format("set(%d, symbol[%d])", symbol));
 213
 214                 return accessory;
 215         }
 216 }
 217
 218 void CentralStation::set_accessory_state(unsigned addr, MagnetAccessory::Type type, unsigned state)
 219 {
 220         unsigned id = map_address(accessories, accessory_addr, addr);
 221         if(id)
 222         {
 223                 MagnetAccessory &accessory = accessories[id];
 224                 if(accessory.type!=type)
 225                         throw logic_error("accessory type conflict");
 226
 227                 unsigned mask = (1<<accessory.bits)-1;
 228
 229                 if(((state^accessory.state)&mask)==0 || !accessory.synced)
 230                 {
 231                         accessory.state = state;
 232                         accessory_state_changed(accessory);
 233                         return;
 234                 }
 235
 236                 accessory.state = (accessory.state&mask) | (state&~mask);
 237
 238                 command(format("set(%d, state[%d])", id, state&mask));
 239         }
 240 }
 241
 242 unsigned CentralStation::get_accessory_state(unsigned addr, MagnetAccessory::Type type) const
 243 {
 244         unsigned id = map_address(accessories, accessory_addr, addr);
 245         if(id)
 246         {
 247                 AccessoryMap::const_iterator i = accessories.find(id);
 248                 if(i!=accessories.end() && i->second.type==type)
 249                         return i->second.state;
 250         }
 251         return 0;
 252 }
 253
 254 void CentralStation::accessory_state_changed(const MagnetAccessory &accessory) const
 255 {
 256         if(accessory.type==MagnetAccessory::TURNOUT)
 257                 signal_turnout.emit(accessory.address, accessory.state);
 258 }
 259
 260 void CentralStation::add_sensor(unsigned addr)
 261 {
 262         sensors.insert(SensorMap::value_type(addr, Sensor()));
 263
 264         if(sensors_synced)
 265         {
 266                 if(addr>s88.size()*16)
 267                         command("create(26, add[0])");
 268         }
 269 }
 270
 271 bool CentralStation::get_sensor(unsigned addr) const
 272 {
 273         SensorMap::const_iterator i = sensors.find(addr);
 274         if(i!=sensors.end())
 275                 return i->second.state;
 276         return false;
 277 }
 278
 279 void CentralStation::tick()
 280 {
 281         while(Message msg = receive())
 282         {
 283                 if(msg.footer.code)
 284                         IO::print("\033[31m*** ERROR: %s: %d %s ***\033[0m\n", msg.header.value, msg.footer.code, msg.footer.value);
 285
 286                 if(msg.header.type=="REPLY")
 287                         process_reply(msg);
 288                 else if(msg.header.type=="EVENT")
 289                         process_event(msg);
 290         }
 291 }
 292
 293 void CentralStation::flush()
 294 {
 295 }
 296
 297 void CentralStation::command(const string &cmd, bool force)
 298 {
 299         if(pending_commands<10 || force)
 300         {
 301                 socket.write(cmd+"\r\n");
 302                 ++pending_commands;
 303         }
 304         else
 305                 cmd_queue.push_back(cmd);
 306 }
 307
 308 CentralStation::Message CentralStation::receive()
 309 {
 310         while(IO::poll(socket, IO::P_INPUT, Time::zero))
 311         {
 312                 char rbuf[1024];
 313                 unsigned len = socket.read(rbuf, sizeof(rbuf));
 314                 if(!len)
 315                         return Message();
 316
 317                 in_buffer.append(rbuf, len);
 318         }
 319
 320         if(!in_buffer.empty())
 321         {
 322                 string::iterator iter = in_buffer.begin();
 323                 if(Message msg = parse_message(iter, in_buffer.end()))
 324                 {
 325                         skip(iter, in_buffer.end(), "\r\n");
 326                         in_buffer.erase(in_buffer.begin(), iter);
 327
 328                         if(msg.header.type=="REPLY" && pending_commands>0)
 329                         {
 330                                 --pending_commands;
 331                                 if(!cmd_queue.empty())
 332                                 {
 333                                         command(cmd_queue.front());
 334                                         cmd_queue.pop_front();
 335                                 }
 336                         }
 337
 338                         return msg;
 339                 }
 340         }
 341
 342         return Message();
 343 }
 344
 345 void CentralStation::process_reply(const Message &msg)
 346 {
 347         if(!msg.header.value.compare(0, 4, "get("))
 348         {
 349                 for(Message::ObjectMap::const_iterator i=msg.content.begin(); i!=msg.content.end(); ++i)
 350                 {
 351                         if(accessories.count(i->first))
 352                                 accessories[i->first].synced = true;
 353
 354                         process_object(i->first, i->second);
 355                 }
 356         }
 357         else if(!msg.header.value.compare(0, 16, "queryObjects(10,"))
 358         {
 359                 for(Message::ObjectMap::const_iterator i=msg.content.begin(); i!=msg.content.end(); ++i)
 360                 {
 361                         LocoMap::iterator j = locos.find(i->first);
 362                         if(j==locos.end())
 363                         {
 364                                 bool found = false;
 365                                 Message::AttribMap::const_iterator k = i->second.find("addr");
 366                                 if(k!=i->second.end())
 367                                 {
 368                                         unsigned addr = lexical_cast<unsigned>(k->second);
 369
 370                                         j = locos.find(addr|0x10000);
 371                                         if(j!=locos.end())
 372                                         {
 373                                                 command(format("request(%d, view, control, force)", i->first));
 374                                                 string cmd = format("get(%d, dir", i->first);
 375                                                 for(unsigned l=0; j->second.func_mask>>l; ++l)
 376                                                         if((j->second.func_mask>>l)&1)
 377                                                                 cmd += format(", func[%d]", l);
 378                                                 cmd += ')';
 379                                                 command(cmd);
 380
 381                                                 locos.insert(LocoMap::value_type(i->first, j->second));
 382                                                 locos.erase(j);
 383
 384                                                 found = true;
 385                                         }
 386                                 }
 387
 388                                 if(!found)
 389                                         locos.insert(LocoMap::value_type(i->first, Locomotive()));
 390                         }
 391
 392                         process_object(i->first, i->second);
 393                 }
 394
 395                 locos_synced = true;
 396
 397                 if(locos.lower_bound(0x10000)!=locos.end())
 398                         command("create(10)");
 399         }
 400         else if(!msg.header.value.compare(0, 16, "queryObjects(11,"))
 401         {
 402                 for(Message::ObjectMap::const_iterator i=msg.content.begin(); i!=msg.content.end(); ++i)
 403                 {
 404                         AccessoryMap::iterator j = accessories.find(i->first);
 405                         if(j==accessories.end())
 406                         {
 407                                 bool found = false;
 408                                 Message::AttribMap::const_iterator k = i->second.find("addr");
 409                                 if(k!=i->second.end())
 410                                 {
 411                                         unsigned addr = lexical_cast<unsigned>(k->second);
 412
 413                                         j = accessories.find(addr|0x10000);
 414                                         if(j!=accessories.end())
 415                                         {
 416                                                 command(format("request(%d, view, control)", i->first));
 417                                                 command(format("set(%d, symbol[%d])", i->first, j->second.symbol));
 418                                                 command(format("get(%d, state)", i->first));
 419
 420                                                 accessories.insert(AccessoryMap::value_type(i->first, j->second));
 421                                                 accessories.erase(j);
 422
 423                                                 found = true;
 424                                         }
 425                                 }
 426
 427                                 if(!found)
 428                                         accessories.insert(AccessoryMap::value_type(i->first, MagnetAccessory()));
 429                         }
 430
 431                         process_object(i->first, i->second);
 432                 }
 433
 434                 accessories_synced = true;
 435
 436                 for(AccessoryMap::const_iterator i=accessories.lower_bound(0x10000); i!=accessories.end(); ++i)
 437                         command("create(11, append)");
 438         }
 439         else if(msg.header.value=="queryObjects(26)")
 440         {
 441                 s88.clear();
 442                 for(Message::ObjectMap::const_iterator i=msg.content.begin(); i!=msg.content.end(); ++i)
 443                 {
 444                         s88.push_back(i->first);
 445                         command(format("request(%d, view)", i->first));
 446                         command(format("get(%d, state)", i->first));
 447                 }
 448
 449                 sensors_synced = true;
 450
 451                 if(!sensors.empty())
 452                 {
 453                         unsigned high_addr = (--sensors.end())->first;
 454                         if(high_addr>16*s88.size())
 455                                 command("create(26, add[0])");
 456                 }
 457         }
 458         else if(msg.header.value=="create(10)")
 459         {
 460                 Message::ObjectMap::const_iterator i = msg.content.find(10);
 461                 if(i!=msg.content.end())
 462                 {
 463                         Message::AttribMap::const_iterator j = i->second.find("id");
 464                         if(j!=i->second.end())
 465                         {
 466                                 unsigned id = lexical_cast<unsigned>(j->second);
 467                                 LocoMap::iterator k = locos.lower_bound(0x10000);
 468                                 if(k!=locos.end())
 469                                 {
 470                                         command(format("request(%d, view, control)", id));
 471                                         command(format("set(%d, addr[%d], protocol[%s], name[\"%s\"])",
 472                                                 id, k->second.address, (k->second.protocol==MM_27 ? "MM27" : "MM14"), k->second.name));
 473                                         command("create(10, append)");
 474
 475                                         locos.insert(LocoMap::value_type(id, k->second));
 476                                         locos.erase(k);
 477                                 }
 478                         }
 479                 }
 480
 481                 if(locos.lower_bound(0x10000)!=locos.end())
 482                         command("create(10)");
 483         }
 484         else if(!msg.header.value.compare(0, 10, "create(11,"))
 485         {
 486                 Message::ObjectMap::const_iterator i = msg.content.find(11);
 487                 if(i!=msg.content.end())
 488                 {
 489                         Message::AttribMap::const_iterator j = i->second.find("id");
 490                         if(j!=i->second.end())
 491                         {
 492                                 unsigned id = lexical_cast<unsigned>(j->second);
 493                                 AccessoryMap::iterator k = accessories.lower_bound(0x10000);
 494                                 if(k!=accessories.end())
 495                                 {
 496                                         command(format("request(%d, view, control)", id));
 497                                         command(format("set(%d, addr[%d], symbol[%d], name1[\"Switch\"], name2[\"%d\"], name3[\"\"])",
 498                                                 id, k->second.address, k->second.symbol, k->second.address));
 499                                         command(format("set(%d, state[%d])", id, k->second.state&((1<<k->second.bits)-1)));
 500
 501                                         k->second.synced = true;
 502                                         accessories.insert(AccessoryMap::value_type(id, k->second));
 503                                         accessories.erase(k);
 504                                 }
 505                         }
 506                 }
 507         }
 508         else if(!msg.header.value.compare(0, 10, "create(26,"))
 509                 command("queryObjects(26)");
 510 }
 511
 512 void CentralStation::process_event(const Message &msg)
 513 {
 514         for(Message::ObjectMap::const_iterator i=msg.content.begin(); i!=msg.content.end(); ++i)
 515                 process_object(i->first, i->second);
 516 }
 517
 518 void CentralStation::process_object(unsigned id, const Message::AttribMap &attribs)
 519 {
 520         if(id==1)
 521         {
 522                 for(Message::AttribMap::const_iterator i=attribs.begin(); i!=attribs.end(); ++i)
 523                         if(i->first=="status")
 524                         {
 525                                 power = (i->second=="GO");
 526                                 signal_power.emit(power);
 527                         }
 528         }
 529         else if(locos.count(id))
 530         {
 531                 Locomotive &loco = locos[id];
 532                 bool speed_changed = false;
 533                 unsigned funcs_changed = 0;
 534                 for(Message::AttribMap::const_iterator i=attribs.begin(); i!=attribs.end(); ++i)
 535                 {
 536                         if(i->first=="name")
 537                                 loco.name = i->second.substr(1, i->second.size()-2);
 538                         else if(i->first=="addr")
 539                         {
 540                                 loco_addr.erase(loco.address);
 541                                 loco.address = lexical_cast<unsigned>(i->second);
 542                                 loco_addr[loco.address] = id;
 543                         }
 544                         else if(i->first=="protocol")
 545                         {
 546                                 if(i->second=="MM")
 547                                         loco.protocol = MM;
 548                                 else if(i->second=="MM27")
 549                                         loco.protocol = MM_27;
 550                                 else if(i->second=="MFX")
 551                                         loco.protocol = MFX;
 552                         }
 553                         else if(i->first=="speedstep")
 554                         {
 555                                 loco.speed = lexical_cast<unsigned>(i->second);
 556                                 if(loco.protocol==MFX && loco.speed)
 557                                         --loco.speed;
 558                                 speed_changed = true;
 559                         }
 560                         else if(i->first=="dir")
 561                         {
 562                                 loco.reverse = i->second[0]!='0';
 563                                 speed_changed = true;
 564                         }
 565                         else if(i->first=="func")
 566                         {
 567                                 vector<string> parts = split(i->second, ", ");
 568                                 unsigned func = lexical_cast<unsigned>(parts[0]);
 569                                 bool value = lexical_cast<unsigned>(parts[1]);
 570                                 loco.funcs &= ~(1<<func);
 571                                 if(value)
 572                                         loco.funcs |= 1<<func;
 573                                 funcs_changed |= 1<<func;
 574                         }
 575                         else if(i->first=="msg")
 576                         {
 577                                 if(i->second=="CONTROL_LOST")
 578                                         command(format("request(%d, control, force)", id));
 579                         }
 580                 }
 581
 582                 if(speed_changed)
 583                         signal_loco_speed.emit(loco.address, loco.speed, loco.reverse);
 584                 for(unsigned i=0; funcs_changed>>i; ++i)
 585                         if(funcs_changed&(1<<i))
 586                                 signal_loco_function.emit(loco.address, i, loco.funcs&(1<<i));
 587         }
 588         else if(accessories.count(id))
 589         {
 590                 MagnetAccessory &accessory = accessories[id];
 591                 bool state_changed = false;
 592                 for(Message::AttribMap::const_iterator i=attribs.begin(); i!=attribs.end(); ++i)
 593                 {
 594                         if(i->first=="addr")
 595                         {
 596                                 accessory_addr.erase(accessory.address);
 597                                 accessory.address = lexical_cast<unsigned>(i->second);
 598                                 accessory_addr[accessory.address] = id;
 599                         }
 600                         else if(i->first=="state")
 601                         {
 602                                 unsigned state = lexical_cast<unsigned>(i->second);
 603                                 unsigned mask = (1<<accessory.bits)-1;
 604                                 accessory.state = (accessory.state&~mask) | (state&mask);
 605                                 state_changed = true;
 606                         }
 607                 }
 608
 609                 if(state_changed)
 610                         accessory_state_changed(accessory);
 611         }
 612         else if(find(s88.begin(), s88.end(), id)!=s88.end())
 613         {
 614                 unsigned base = 0;
 615                 for(; (base<s88.size() && s88[base]!=id); ++base) ;
 616
 617                 for(Message::AttribMap::const_iterator i=attribs.begin(); i!=attribs.end(); ++i)
 618                 {
 619                         if(i->first=="state")
 620                         {
 621                                 unsigned state = lexical_cast<unsigned>(i->second, "%i");
 622                                 for(unsigned j=0; j<16; ++j)
 623                                 {
 624                                         unsigned addr = base*16+j+1;
 625                                         Sensor &sensor = sensors[addr];
 626                                         bool s = state&(1<<j);
 627                                         if(s!=sensor.state)
 628                                         {
 629                                                 sensor.state = s;
 630                                                 signal_sensor.emit(addr, sensor.state);
 631                                         }
 632                                 }
 633                         }
 634                 }
 635         }
 636 }
 637
 638 CentralStation::Protocol CentralStation::map_protocol(const string &name) const
 639 {
 640         if(name=="MM")
 641                 return MM;
 642         else if(name=="MM-27")
 643                 return MM_27;
 644         else if(name=="MFX")
 645                 return MFX;
 646         else
 647                 throw invalid_argument("CentralStation::map_protocol");
 648 }
 649
 650 template<typename T>
 651 unsigned CentralStation::map_address(const map<unsigned, T> &omap, const AddressMap &amap, unsigned addr) const
 652 {
 653         if(omap.count(addr))
 654                 return addr;
 655         else
 656         {
 657                 AddressMap::const_iterator i = amap.find(addr);
 658                 if(i!=amap.end())
 659                         return i->second;
 660                 else
 661                         return 0;
 662         }
 663 }
 664
 665 void CentralStation::skip(string::iterator &iter, const string::iterator &end, const string &what) const
 666 {
 667         for(; (iter!=end && what.find(*iter)!=string::npos); ++iter) ;
 668 }
 669
 670 string CentralStation::parse_token(string::iterator &iter, const string::iterator &end, const string &stop) const
 671 {
 672         vector<char> parens;
 673         bool quote = false;
 674         string token;
 675
 676         skip(iter, end, stop);
 677
 678         for(; iter!=end; ++iter)
 679         {
 680                 if(stop.find(*iter)!=string::npos && parens.empty() && !quote)
 681                         break;
 682                 else if(*iter=='(' || *iter=='[')
 683                         parens.push_back(*iter);
 684                 else if((*iter==')' || *iter==']') && !parens.empty())
 685                 {
 686                         if((*iter==')' && parens.back()!='(') || (*iter==']' && parens.back()!='['))
 687                                 IO::print("Mismatched parentheses\n");
 688                         parens.pop_back();
 689                 }
 690                 else if(*iter=='"')
 691                         quote = !quote;
 692
 693                 token += *iter;
 694         }
 695
 696         return token;
 697 }
 698
 699 CentralStation::Tag CentralStation::parse_tag(string::iterator &iter, const string::iterator &end) const
 700 {
 701         Tag tag;
 702
 703         for(; (iter!=end && *iter!='<'); ++iter) ;
 704         if(iter==end)
 705                 return Tag();
 706
 707         tag.type = parse_token(++iter, end, " >");
 708         if(tag.type=="END")
 709         {
 710                 string code = parse_token(iter, end, " >");
 711                 tag.code = lexical_cast<unsigned>(code);
 712         }
 713         skip(iter, end, " ");
 714         tag.value = parse_token(iter, end, ">");
 715         if(iter==end)
 716                 return Tag();
 717         ++iter;
 718
 719         return tag;
 720 }
 721
 722 CentralStation::Message CentralStation::parse_message(string::iterator &iter, const string::iterator &end) const
 723 {
 724         Message msg;
 725
 726         msg.header = parse_tag(iter, end);
 727
 728         while(iter!=end)
 729         {
 730                 skip(iter, end, "\r\n");
 731                 if(*iter=='<')
 732                         break;
 733
 734                 string id = parse_token(iter, end, " \r\n<");
 735                 Message::AttribMap &attribs = msg.content[lexical_cast<unsigned>(id)];
 736                 while(iter!=end && *iter!='\n' && *iter!='\r')
 737                 {
 738                         string attr = parse_token(iter, end, " \r\n<");
 739                         string::size_type open_bracket = attr.find('[');
 740                         if(open_bracket!=string::npos)
 741                         {
 742                                 string::size_type close_bracket = attr.rfind(']');
 743                                 string attr_name = attr.substr(0, open_bracket);
 744                                 string attr_value = attr.substr(open_bracket+1, close_bracket-open_bracket-1);
 745                                 attribs.insert(Message::AttribMap::value_type(attr_name, attr_value));
 746                         }
 747                         else
 748                                 attribs.insert(Message::AttribMap::value_type(attr, string()));
 749                 }
 750         }
 751
 752         msg.footer = parse_tag(iter, end);
 753         if(msg.footer.type.empty())
 754                 return Message();
 755
 756         return msg;
 757 }
 758
 759
 760 CentralStation::Tag::Tag():
 761         code(0)
 762 { }
 763
 764 CentralStation::Tag::operator bool() const
 765 {
 766         return !type.empty();
 767 }
 768
 769
 770 CentralStation::Message::operator bool() const
 771 {
 772         return header && footer;
 773 }
 774
 775
 776 CentralStation::Locomotive::Locomotive():
 777         address(0),
 778         speed(0),
 779         reverse(false),
 780         func_mask(0),
 781         funcs(0),
 782         control(false)
 783 { }
 784
 785
 786 CentralStation::MagnetAccessory::MagnetAccessory():
 787         address(0),
 788         type(TURNOUT),
 789         symbol(TURNOUT_LEFT),
 790         state(0),
 791         bits(1),
 792         synced(false)
 793 { }
 794
 795
 796 CentralStation::Sensor::Sensor():
 797         state(false)
 798 { }
 799
 800 } // namespace R2C2