lib/dvb/db.cpp

   1 #include <errno.h>
   2 #include <lib/dvb/db.h>
   3 #include <lib/dvb/frontend.h>
   4 #include <lib/base/eerror.h>
   5 #include <lib/base/estring.h>
   6 #include <dvbsi++/service_description_section.h>
   7 #include <dvbsi++/descriptor_tag.h>
   8 #include <dvbsi++/service_descriptor.h>
   9 #include <dvbsi++/satellite_delivery_system_descriptor.h>
  10
  11 DEFINE_REF(eDVBService);
  12
  13 eDVBService::eDVBService()
  14 {
  15 }
  16
  17 eDVBService::~eDVBService()
  18 {
  19 }
  20
  21 eDVBService &eDVBService::operator=(const eDVBService &s)
  22 {
  23         m_service_name = s.m_service_name;
  24         m_service_name_sort = s.m_service_name_sort;
  25         m_provider_name = s.m_provider_name;
  26         m_flags = s.m_flags;
  27         m_ca = s.m_ca;
  28         m_cache = s.m_cache;
  29         return *this;
  30 }
  31
  32 RESULT eDVBService::getName(const eServiceReference &ref, std::string &name)
  33 {
  34         if ( ref.name.length() )
  35                 name = ref.name;
  36         else
  37                 name = m_service_name;
  38         return 0;
  39 }
  40
  41 int eDVBService::getLength(const eServiceReference &ref)
  42 {
  43         return -1;
  44 }
  45
  46 int eDVBService::checkFilter(const eServiceReferenceDVB &ref, const eDVBChannelQuery &query)
  47 {
  48         int res = 0;
  49         switch (query.m_type)
  50         {
  51         case eDVBChannelQuery::tName:
  52                 res = m_service_name_sort.find(query.m_string) != std::string::npos;
  53                 break;
  54         case eDVBChannelQuery::tProvider:
  55                 res = m_provider_name.find(query.m_string) != std::string::npos;
  56                 break;
  57         case eDVBChannelQuery::tType:
  58                 res = ref.getServiceType() == query.m_int;
  59                 break;
  60         case eDVBChannelQuery::tBouquet:
  61                 res = 0;
  62                 break;
  63         case eDVBChannelQuery::tSatellitePosition:
  64                 res = (ref.getDVBNamespace().get() >> 16) == query.m_int;
  65                 break;
  66         case eDVBChannelQuery::tChannelID:
  67         {
  68                 eDVBChannelID chid;
  69                 ref.getChannelID(chid);
  70                 res = chid == query.m_channelid;
  71                 break;
  72         }
  73         case eDVBChannelQuery::tAND:
  74                 res = checkFilter(ref, *query.m_p1) && checkFilter(ref, *query.m_p2);
  75                 break;
  76         case eDVBChannelQuery::tOR:
  77                 res = checkFilter(ref, *query.m_p1) || checkFilter(ref, *query.m_p2);
  78                 break;
  79         }
  80
  81         if (query.m_inverse)
  82                 return !res;
  83         else
  84                 return res;
  85 }
  86
  87 int eDVBService::getCachePID(cacheID id)
  88 {
  89         std::map<int, int>::iterator it = m_cache.find(id);
  90         if ( it != m_cache.end() )
  91                 return it->second;
  92         return -1;
  93 }
  94
  95 void eDVBService::setCachePID(cacheID id, int pid)
  96 {
  97         m_cache[id] = pid;
  98 }
  99
 100 DEFINE_REF(eDVBDB);
 101
 102         /* THIS CODE IS BAD. it should be replaced by somethine better. */
 103 void eDVBDB::load()
 104 {
 105         eDebug("---- opening lame channel db");
 106         FILE *f=fopen("lamedb", "rt");
 107         if (!f)
 108                 return;
 109         char line[256];
 110         if ((!fgets(line, 256, f)) || strncmp(line, "eDVB services", 13))
 111         {
 112                 eDebug("not a servicefile");
 113                 fclose(f);
 114                 return;
 115         }
 116         eDebug("reading services");
 117         if ((!fgets(line, 256, f)) || strcmp(line, "transponders\n"))
 118         {
 119                 eDebug("services invalid, no transponders");
 120                 fclose(f);
 121                 return;
 122         }
 123
 124         // clear all transponders
 125
 126         while (!feof(f))
 127         {
 128                 if (!fgets(line, 256, f))
 129                         break;
 130                 if (!strcmp(line, "end\n"))
 131                         break;
 132                 int dvb_namespace=-1, transport_stream_id=-1, original_network_id=-1;
 133                 sscanf(line, "%x:%x:%x", &dvb_namespace, &transport_stream_id, &original_network_id);
 134                 if (original_network_id == -1)
 135                         continue;
 136                 eDVBChannelID channelid = eDVBChannelID(
 137                         eDVBNamespace(dvb_namespace),
 138                         eTransportStreamID(transport_stream_id),
 139                         eOriginalNetworkID(original_network_id));
 140
 141                 ePtr<eDVBFrontendParameters> feparm = new eDVBFrontendParameters;
 142                 while (!feof(f))
 143                 {
 144                         fgets(line, 256, f);
 145                         if (!strcmp(line, "/\n"))
 146                                 break;
 147                         if (line[1]=='s')
 148                         {
 149                                 eDVBFrontendParametersSatellite sat;
 150                                 int frequency, symbol_rate, polarisation, fec, orbital_position, inversion;
 151                                 sscanf(line+2, "%d:%d:%d:%d:%d:%d", &frequency, &symbol_rate, &polarisation, &fec, &orbital_position, &inversion);
 152                                 sat.frequency = frequency;
 153                                 sat.symbol_rate = symbol_rate;
 154                                 sat.polarisation = polarisation;
 155                                 sat.fec = fec;
 156                                 sat.orbital_position = orbital_position;
 157                                 sat.inversion = inversion;
 158                                 // ...
 159 //                              t.setSatellite(frequency, symbol_rate, polarisation, fec, sat, inversion);
 160                                 feparm->setDVBS(sat);
 161                         } else if (line[1]=='t')
 162                         {
 163                                 eDVBFrontendParametersTerrestrial ter;
 164                                 int frequency, bandwidth, code_rate_HP, code_rate_LP, modulation, transmission_mode, guard_interval, hierarchy, inversion;
 165                                 sscanf(line+2, "%d:%d:%d:%d:%d:%d:%d:%d:%d", &frequency, &bandwidth, &code_rate_HP, &code_rate_LP, &modulation, &transmission_mode, &guard_interval, &hierarchy, &inversion);
 166                                 ter.frequency = frequency;
 167                                 ter.bandwidth = bandwidth;
 168                                 ter.code_rate_HP = code_rate_HP;
 169                                 ter.code_rate_LP = code_rate_LP;
 170                                 ter.modulation = modulation;
 171                                 ter.transmission_mode = transmission_mode;
 172                                 ter.guard_interval = guard_interval;
 173                                 ter.hierarchy = hierarchy;
 174                                 ter.inversion = inversion;
 175
 176                                 feparm->setDVBT(ter);
 177                         } else if (line[1]=='c')
 178                         {
 179                                 int frequency, symbol_rate, inversion=0, modulation=3;
 180                                 sscanf(line+2, "%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation);
 181 //                              t.setCable(frequency, symbol_rate, inversion, modulation);
 182                         }
 183                 }
 184                 addChannelToList(channelid, feparm);
 185         }
 186
 187         if ((!fgets(line, 256, f)) || strcmp(line, "services\n"))
 188         {
 189                 eDebug("services invalid, no services");
 190                 return;
 191         }
 192
 193         // clear all services
 194
 195         int count=0;
 196
 197         while (!feof(f))
 198         {
 199                 if (!fgets(line, 256, f))
 200                         break;
 201                 if (!strcmp(line, "end\n"))
 202                         break;
 203
 204                 int service_id=-1, dvb_namespace, transport_stream_id=-1, original_network_id=-1, service_type=-1, service_number=-1;
 205                 sscanf(line, "%x:%x:%x:%x:%d:%d", &service_id, &dvb_namespace, &transport_stream_id, &original_network_id, &service_type, &service_number);
 206                 if (service_number == -1)
 207                         continue;
 208                 ePtr<eDVBService> s = new eDVBService;
 209                 eServiceReferenceDVB ref =
 210                                                 eServiceReferenceDVB(
 211                                                 eDVBNamespace(dvb_namespace),
 212                                                 eTransportStreamID(transport_stream_id),
 213                                                 eOriginalNetworkID(original_network_id),
 214                                                 eServiceID(service_id),
 215                                                 service_type);
 216                 count++;
 217                 fgets(line, 256, f);
 218                 if (strlen(line))
 219                         line[strlen(line)-1]=0;
 220
 221                 s->m_service_name = line;
 222                 s->m_service_name_sort = removeDVBChars(line);
 223                 makeUpper(s->m_service_name_sort);
 224
 225                 fgets(line, 256, f);
 226                 if (strlen(line))
 227                         line[strlen(line)-1]=0;
 228
 229                 std::string str=line;
 230
 231                 if (str[1]!=':')        // old ... (only service_provider)
 232                 {
 233                         s->m_provider_name=line;
 234                 } else
 235                         while ((!str.empty()) && str[1]==':') // new: p:, f:, c:%02d...
 236                         {
 237                                 unsigned int c=str.find(',');
 238                                 char p=str[0];
 239                                 std::string v;
 240                                 if (c == std::string::npos)
 241                                 {
 242                                         v=str.substr(2);
 243                                         str="";
 244                                 } else
 245                                 {
 246                                         v=str.substr(2, c-2);
 247                                         str=str.substr(c+1);
 248                                 }
 249 //                              eDebug("%c ... %s", p, v.c_str());
 250                                 if (p == 'p')
 251                                         s->m_provider_name=v;
 252                                 else if (p == 'f')
 253                                 {
 254                                         sscanf(v.c_str(), "%x", &s->m_flags);
 255                                 } else if (p == 'c')
 256                                 {
 257                                         int cid, val;
 258                                         sscanf(v.c_str(), "%02d%04x", &cid, &val);
 259                                         s->m_cache[cid]=val;
 260                                 } else if (p == 'C')
 261                                 {
 262                                         int val;
 263                                         sscanf(v.c_str(), "%04x", &val);
 264                                         s->m_ca.insert(val);
 265                                 }
 266                         }
 267                 addService(ref, s);
 268         }
 269
 270         eDebug("loaded %d services", count);
 271
 272         fclose(f);
 273 }
 274
 275 void eDVBDB::save()
 276 {
 277         eDebug("---- saving lame channel db");
 278         FILE *f=fopen("lamedb", "wt");
 279         int channels=0, services=0;
 280         if (!f)
 281                 eFatal("couldn't save lame channel db!");
 282         fprintf(f, "eDVB services /3/\n");
 283         fprintf(f, "transponders\n");
 284         for (std::map<eDVBChannelID, channel>::const_iterator i(m_channels.begin());
 285                         i != m_channels.end(); ++i)
 286         {
 287                 const eDVBChannelID &chid = i->first;
 288                 const channel &ch = i->second;
 289
 290                 fprintf(f, "%08x:%04x:%04x\n", chid.dvbnamespace.get(),
 291                                 chid.transport_stream_id.get(), chid.original_network_id.get());
 292                 eDVBFrontendParametersSatellite sat;
 293                 eDVBFrontendParametersTerrestrial ter;
 294                 if (!ch.m_frontendParameters->getDVBS(sat))
 295                 {
 296                         fprintf(f, "\ts %d:%d:%d:%d:%d:%d\n",
 297                                 sat.frequency, sat.symbol_rate,
 298                                 sat.polarisation, sat.fec, sat.orbital_position,
 299                                 sat.inversion);
 300                 }
 301                 if (!ch.m_frontendParameters->getDVBT(ter))
 302                 {
 303                         fprintf(f, "\tt %d:%d:%d:%d:%d:%d:%d:%d:%d\n",
 304                                 ter.frequency, ter.bandwidth, ter.code_rate_HP,
 305                                 ter.code_rate_LP, ter.modulation, ter.transmission_mode,
 306                                 ter.guard_interval, ter.hierarchy, ter.inversion);
 307                 }
 308                 fprintf(f, "/\n");
 309                 channels++;
 310         }
 311         fprintf(f, "end\nservices\n");
 312
 313         for (std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator i(m_services.begin());
 314                 i != m_services.end(); ++i)
 315         {
 316                 const eServiceReferenceDVB &s = i->first;
 317                 fprintf(f, "%04x:%08x:%04x:%04x:%d:%d\n",
 318                                 s.getServiceID().get(), s.getDVBNamespace().get(),
 319                                 s.getTransportStreamID().get(),s.getOriginalNetworkID().get(),
 320                                 s.getServiceType(),
 321                                 0);
 322
 323                 fprintf(f, "%s\n", i->second->m_service_name.c_str());
 324                 fprintf(f, "p:%s", i->second->m_provider_name.c_str());
 325
 326                 // write cached pids
 327                 for (std::map<int,int>::const_iterator ca(i->second->m_cache.begin());
 328                         ca != i->second->m_cache.end(); ++ca)
 329                         fprintf(f, ",c:%02d%04x", ca->first, ca->second);
 330
 331                 // write cached ca pids
 332                 for (std::set<int>::const_iterator ca(i->second->m_ca.begin());
 333                         ca != i->second->m_ca.end(); ++ca)
 334                         fprintf(f, ",C:%04x", *ca);
 335
 336                 fprintf(f, "\n");
 337                 services++;
 338         }
 339         fprintf(f, "end\nHave a lot of bugs!\n");
 340         eDebug("saved %d channels and %d services!", channels, services);
 341         fclose(f);
 342 }
 343
 344 void eDVBDB::loadBouquet(const char *path)
 345 {
 346         std::string bouquet_name = path;
 347         if (!bouquet_name.length())
 348         {
 349                 eDebug("Bouquet load failed.. no path given..");
 350                 return;
 351         }
 352         unsigned int pos = bouquet_name.rfind('/');
 353         if ( pos != std::string::npos )
 354                 bouquet_name.erase(0, pos+1);
 355         if (bouquet_name.empty())
 356         {
 357                 eDebug("Bouquet load failed.. no filename given..");
 358                 return;
 359         }
 360         eBouquet &bouquet = m_bouquets[bouquet_name];
 361         bouquet.m_path = path;
 362         std::list<eServiceReference> &list = bouquet.m_services;
 363         list.clear();
 364
 365         eDebug("loading bouquet... %s", path);
 366         FILE *fp=fopen(path, "rt");
 367         int entries=0;
 368         if (!fp)
 369         {
 370                 eDebug("failed to open.");
 371                 return;
 372         }
 373         char line[256];
 374         bool read_descr=false;
 375         eServiceReference *e = NULL;
 376         while (1)
 377         {
 378                 if (!fgets(line, 256, fp))
 379                         break;
 380                 line[strlen(line)-1]=0;
 381                 if (strlen(line) && line[strlen(line)-1]=='\r')
 382                         line[strlen(line)-1]=0;
 383                 if (!line[0])
 384                         break;
 385                 if (line[0]=='#')
 386                 {
 387                         if (!strncmp(line, "#SERVICE ", 9) || !strncmp(line, "#SERVICE: ", 10))
 388                         {
 389                                 int offs = line[8] == ':' ? 10 : 9;
 390                                 eServiceReference tmp(line+offs);
 391                                 if (tmp.type != eServiceReference::idDVB)
 392                                 {
 393                                         eDebug("only DVB Bouquets supported");
 394                                         continue;
 395                                 }
 396                                 if ( (tmp.flags&eServiceReference::flagDirectory) == eServiceReference::flagDirectory )
 397                                 {
 398                                         std::string str = tmp.path;
 399                                         unsigned int pos = str.rfind('/');
 400                                         if ( pos != std::string::npos )
 401                                                 str.erase(0, pos+1);
 402                                         if (str.empty())
 403                                         {
 404                                                 eDebug("Bouquet load failed.. no filename given..");
 405                                                 continue;
 406                                         }
 407                                         loadBouquet(tmp.path.c_str());
 408                                         char buf[256];
 409                                         snprintf(buf, 256, "(type == %d) FROM BOUQUET \"%s\" ORDER BY bouquet", tmp.data[0], str.c_str());
 410                                         tmp.path = buf;
 411                                 }
 412                                 list.push_back(tmp);
 413                                 e = &list.back();
 414                                 read_descr=true;
 415                                 ++entries;
 416                         }
 417                         else if (read_descr && !strncmp(line, "#DESCRIPTION ", 13))
 418                         {
 419                                 e->name = line+13;
 420                                 read_descr=false;
 421                         }
 422                         else if (!strncmp(line, "#NAME ", 6))
 423                                 bouquet.m_bouquet_name=line+6;
 424                         continue;
 425                 }
 426         }
 427         fclose(fp);
 428         eDebug("%d entries in Bouquet %s", entries, bouquet_name.c_str());
 429 }
 430
 431 void eDVBDB::saveBouquet(const char *path)
 432 {
 433
 434 }
 435
 436 void eDVBDB::loadBouquets()
 437 {
 438         loadBouquet("bouquets.tv");
 439         loadBouquet("bouquets.radio");
 440 }
 441
 442 void eDVBDB::saveBouquets()
 443 {
 444
 445 }
 446
 447 eDVBDB::eDVBDB()
 448 {
 449         load();
 450         loadBouquets();
 451 }
 452
 453 eDVBDB::~eDVBDB()
 454 {
 455 //      save();
 456 }
 457
 458 RESULT eDVBDB::addChannelToList(const eDVBChannelID &id, iDVBFrontendParameters *feparm)
 459 {
 460         channel ch;
 461         assert(feparm);
 462         ch.m_frontendParameters = feparm;
 463         m_channels.insert(std::pair<eDVBChannelID, channel>(id, ch));
 464         return 0;
 465 }
 466
 467 RESULT eDVBDB::removeChannel(const eDVBChannelID &id)
 468 {
 469         m_channels.erase(id);
 470         return 0;
 471 }
 472
 473 RESULT eDVBDB::getChannelFrontendData(const eDVBChannelID &id, ePtr<iDVBFrontendParameters> &parm)
 474 {
 475         std::map<eDVBChannelID, channel>::iterator i = m_channels.find(id);
 476         if (i == m_channels.end())
 477         {
 478                 parm = 0;
 479                 return -ENOENT;
 480         }
 481         parm = i->second.m_frontendParameters;
 482         return 0;
 483 }
 484
 485 RESULT eDVBDB::addService(const eServiceReferenceDVB &serviceref, eDVBService *service)
 486 {
 487         m_services.insert(std::pair<eServiceReferenceDVB, ePtr<eDVBService> >(serviceref, service));
 488         return 0;
 489 }
 490
 491 RESULT eDVBDB::getService(const eServiceReferenceDVB &reference, ePtr<eDVBService> &service)
 492 {
 493         std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator i;
 494         i = m_services.find(reference);
 495         if (i == m_services.end())
 496         {
 497                 service = 0;
 498                 return -ENOENT;
 499         }
 500         service = i->second;
 501         return 0;
 502 }
 503
 504 RESULT eDVBDB::getBouquet(const eServiceReference &ref, const eBouquet* &bouquet)
 505 {
 506         std::string str = ref.path;
 507         if (str.empty())
 508         {
 509                 eDebug("getBouquet failed.. no path given!");
 510                 return -1;
 511         }
 512         unsigned int pos = str.find("FROM BOUQUET \"");
 513         if ( pos != std::string::npos )
 514         {
 515                 str.erase(0, pos+14);
 516                 pos = str.find('"');
 517                 if ( pos != std::string::npos )
 518                         str.erase(pos);
 519                 else
 520                         str.clear();
 521         }
 522         if (str.empty())
 523         {
 524                 eDebug("getBouquet failed.. couldn't parse bouquet name");
 525                 return -1;
 526         }
 527         std::map<std::string, eBouquet>::iterator i =
 528                 m_bouquets.find(str);
 529         if (i == m_bouquets.end())
 530         {
 531                 bouquet = 0;
 532                 return -ENOENT;
 533         }
 534         bouquet = &i->second;
 535         return 0;
 536 }
 537
 538 RESULT eDVBDB::startQuery(ePtr<iDVBChannelListQuery> &query, eDVBChannelQuery *q, const eServiceReference &source)
 539 {
 540         if ( q && q->m_bouquet_name.length() )
 541                 query = new eDVBDBBouquetQuery(this, source, q);
 542         else
 543                 query = new eDVBDBQuery(this, source, q);
 544         return 0;
 545 }
 546
 547 DEFINE_REF(eDVBDBQueryBase);
 548
 549 eDVBDBQueryBase::eDVBDBQueryBase(eDVBDB *db, const eServiceReference &source, eDVBChannelQuery *query)
 550         :m_db(db), m_query(query), m_source(source)
 551 {
 552 }
 553
 554 int eDVBDBQueryBase::compareLessEqual(const eServiceReferenceDVB &a, const eServiceReferenceDVB &b)
 555 {
 556         ePtr<eDVBService> a_service, b_service;
 557
 558         int sortmode = m_query ? m_query->m_sort : eDVBChannelQuery::tName;
 559
 560         if ((sortmode == eDVBChannelQuery::tName) || (sortmode == eDVBChannelQuery::tProvider))
 561         {
 562                 if (m_db->getService(a, a_service))
 563                         return 1;
 564                 if (m_db->getService(b, b_service))
 565                         return 1;
 566         }
 567
 568         switch (sortmode)
 569         {
 570         case eDVBChannelQuery::tName:
 571                 return a_service->m_service_name_sort < b_service->m_service_name_sort;
 572         case eDVBChannelQuery::tProvider:
 573                 return a_service->m_provider_name < b_service->m_provider_name;
 574         case eDVBChannelQuery::tType:
 575                 return a.getServiceType() < b.getServiceType();
 576         case eDVBChannelQuery::tBouquet:
 577                 return 0;
 578         case eDVBChannelQuery::tSatellitePosition:
 579                 return (a.getDVBNamespace().get() >> 16) < (b.getDVBNamespace().get() >> 16);
 580         default:
 581                 return 1;
 582         }
 583         return 0;
 584 }
 585
 586 eDVBDBQuery::eDVBDBQuery(eDVBDB *db, const eServiceReference &source, eDVBChannelQuery *query)
 587         :eDVBDBQueryBase(db, source, query)
 588 {
 589         m_cursor = m_db->m_services.begin();
 590 }
 591
 592 RESULT eDVBDBQuery::getNextResult(eServiceReferenceDVB &ref)
 593 {
 594         while (m_cursor != m_db->m_services.end())
 595         {
 596                 ref = m_cursor->first;
 597
 598                 int res = (!m_query) || m_cursor->second->checkFilter(ref, *m_query);
 599
 600                 ++m_cursor;
 601
 602                 if (res)
 603                         return 0;
 604         }
 605
 606         ref = eServiceReferenceDVB();
 607         return 1;
 608 }
 609
 610 eDVBDBBouquetQuery::eDVBDBBouquetQuery(eDVBDB *db, const eServiceReference &source, eDVBChannelQuery *query)
 611         :eDVBDBQueryBase(db, source, query), m_cursor(db->m_bouquets[query->m_bouquet_name].m_services.begin())
 612 {
 613 }
 614
 615 RESULT eDVBDBBouquetQuery::getNextResult(eServiceReferenceDVB &ref)
 616 {
 617         eBouquet &bouquet = m_db->m_bouquets[m_query->m_bouquet_name];
 618         std::list<eServiceReference> &list = bouquet.m_services;
 619         while (m_cursor != list.end())
 620         {
 621                 ref = *((eServiceReferenceDVB*)&(*m_cursor));
 622
 623                 std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator it =
 624                         m_db->m_services.find(ref);
 625
 626                 int res = (!m_query) || it == m_db->m_services.end() || it->second->checkFilter(ref, *m_query);
 627
 628                 ++m_cursor;
 629
 630                 if (res)
 631                         return 0;
 632         }
 633
 634         ref = eServiceReferenceDVB();
 635
 636         return 1;
 637 }
 638
 639 /* (<name|provider|type|bouquet|satpos|chid> <==|...> <"string"|int>)[||,&& (..)] */
 640
 641 static int decodeType(const std::string &type)
 642 {
 643         if (type == "name")
 644                 return eDVBChannelQuery::tName;
 645         else if (type == "provider")
 646                 return eDVBChannelQuery::tProvider;
 647         else if (type == "type")
 648                 return eDVBChannelQuery::tType;
 649         else if (type == "bouquet")
 650                 return eDVBChannelQuery::tBouquet;
 651         else if (type == "satellitePosition")
 652                 return eDVBChannelQuery::tSatellitePosition;
 653         else if (type == "channelID")
 654                 return eDVBChannelQuery::tChannelID;
 655         else
 656                 return -1;
 657 }
 658
 659         /* never, NEVER write a parser in C++! */
 660 RESULT parseExpression(ePtr<eDVBChannelQuery> &res, std::list<std::string>::const_iterator begin, std::list<std::string>::const_iterator end)
 661 {
 662         std::list<std::string>::const_iterator end_of_exp;
 663         if (*begin == "(")
 664         {
 665                 end_of_exp = begin;
 666                 while (end_of_exp != end)
 667                         if (*end_of_exp == ")")
 668                                 break;
 669                         else
 670                                 ++end_of_exp;
 671
 672                 if (end_of_exp == end)
 673                 {
 674                         eDebug("expression parse: end of expression while searching for closing brace");
 675                         return -1;
 676                 }
 677
 678                 ++begin;
 679                 // begin..end_of_exp
 680                 int r = parseExpression(res, begin, end_of_exp);
 681                 if (r)
 682                         return r;
 683                 ++end_of_exp;
 684
 685                         /* we had only one sub expression */
 686                 if (end_of_exp == end)
 687                 {
 688 //                      eDebug("only one sub expression");
 689                         return 0;
 690                 }
 691
 692                         /* otherwise we have an operator here.. */
 693
 694                 ePtr<eDVBChannelQuery> r2 = res;
 695                 res = new eDVBChannelQuery();
 696                 res->m_sort = 0;
 697                 res->m_p1 = r2;
 698                 res->m_inverse = 0;
 699                 r2 = 0;
 700
 701                 if (*end_of_exp == "||")
 702                         res->m_type = eDVBChannelQuery::tOR;
 703                 else if (*end_of_exp == "&&")
 704                         res->m_type = eDVBChannelQuery::tAND;
 705                 else
 706                 {
 707                         eDebug("found operator %s, but only && and || are allowed!", end_of_exp->c_str());
 708                         res = 0;
 709                         return 1;
 710                 }
 711
 712                 ++end_of_exp;
 713
 714                 return parseExpression(res->m_p2, end_of_exp, end);
 715         }
 716
 717         // "begin" <op> "end"
 718         std::string type, op, val;
 719
 720         res = new eDVBChannelQuery();
 721         res->m_sort = 0;
 722
 723         int cnt = 0;
 724         while (begin != end)
 725         {
 726                 switch (cnt)
 727                 {
 728                 case 0:
 729                         type = *begin;
 730                         break;
 731                 case 1:
 732                         op = *begin;
 733                         break;
 734                 case 2:
 735                         val = *begin;
 736                         break;
 737                 case 3:
 738                         eDebug("malformed query: got '%s', but expected only <type> <op> <val>", begin->c_str());
 739                         return 1;
 740                 }
 741                 ++begin;
 742                 ++cnt;
 743         }
 744
 745         if (cnt != 3)
 746         {
 747                 eDebug("malformed query: missing stuff");
 748                 res = 0;
 749                 return 1;
 750         }
 751
 752         res->m_type = decodeType(type);
 753
 754         if (res->m_type == -1)
 755         {
 756                 eDebug("malformed query: invalid type %s", type.c_str());
 757                 res = 0;
 758                 return 1;
 759         }
 760
 761         if (op == "==")
 762                 res->m_inverse = 0;
 763         else if (op == "!=")
 764                 res->m_inverse = 1;
 765         else
 766         {
 767                 eDebug("invalid operator %s", op.c_str());
 768                 res = 0;
 769                 return 1;
 770         }
 771
 772         res->m_string = val;
 773         res->m_int = atoi(val.c_str());
 774 //      res->m_channelid = eDVBChannelID(val);
 775
 776         return 0;
 777 }
 778
 779 RESULT eDVBChannelQuery::compile(ePtr<eDVBChannelQuery> &res, std::string query)
 780 {
 781         std::list<std::string> tokens;
 782
 783         std::string current_token;
 784         std::string bouquet_name;
 785
 786 //      eDebug("splitting %s....", query.c_str());
 787         unsigned int i = 0;
 788         const char *splitchars="()";
 789         int quotemode = 0, lastsplit = 0, lastalnum = 0;
 790         while (i <= query.size())
 791         {
 792                 int c = (i < query.size()) ? query[i] : ' ';
 793                 ++i;
 794
 795                 int issplit = !!strchr(splitchars, c);
 796                 int isaln = isalnum(c);
 797                 int iswhite = c == ' ';
 798                 int isquot = c == '\"';
 799
 800                 if (quotemode)
 801                 {
 802                         iswhite = issplit = 0;
 803                         isaln = lastalnum;
 804                 }
 805
 806                 if (issplit || iswhite || isquot || lastsplit || (lastalnum != isaln))
 807                 {
 808                         if (current_token.size())
 809                                 tokens.push_back(current_token);
 810                         current_token.clear();
 811                 }
 812
 813                 if (!(iswhite || isquot))
 814                         current_token += c;
 815
 816                 if (isquot)
 817                         quotemode = !quotemode;
 818                 lastsplit = issplit;
 819                 lastalnum = isaln;
 820         }
 821
 822 //      for (std::list<std::string>::const_iterator a(tokens.begin()); a != tokens.end(); ++a)
 823 //      {
 824 //              printf("%s\n", a->c_str());
 825 //      }
 826
 827         int sort = eDVBChannelQuery::tName;
 828                 /* check for "ORDER BY ..." */
 829
 830         while (tokens.size() > 2)
 831         {
 832                 std::list<std::string>::iterator it = tokens.end();
 833                 --it; --it; --it;
 834                 if (*it == "ORDER")
 835                 {
 836                         ++it;
 837                         if (*it == "BY")
 838                         {
 839                                 ++it;
 840                                 sort = decodeType(*it);
 841                                 tokens.pop_back(); // ...
 842                                 tokens.pop_back(); // BY
 843                                 tokens.pop_back(); // ORDER
 844                         } else
 845                                 sort = -1;
 846                 }
 847                 else if (*it == "FROM")
 848                 {
 849                         ++it;
 850                         if (*it == "BOUQUET")
 851                         {
 852                                 ++it;
 853                                 bouquet_name = *it;
 854                                 tokens.pop_back(); // ...
 855                                 tokens.pop_back(); // FROM
 856                                 tokens.pop_back(); // BOUQUET
 857                         }
 858                 }
 859                 else
 860                         break;
 861         }
 862
 863         if (sort == -1)
 864         {
 865                 eWarning("ORDER BY .. string invalid.");
 866                 res = 0;
 867                 return -1;
 868         }
 869
 870 //      eDebug("sort by %d", sort);
 871
 872                 /* now we recursivly parse that. */
 873         int r = parseExpression(res, tokens.begin(), tokens.end());
 874
 875         if (res)
 876         {
 877                 res->m_sort = sort;
 878                 res->m_bouquet_name = bouquet_name;
 879         }
 880
 881 //      eDebug("return: %d", r);
 882         return r;
 883 }
 884
 885 DEFINE_REF(eDVBChannelQuery);