move mark service as new code to better position
[enigma2.git] / lib / dvb / db.cpp
index a3a98c0401683c9c68badee3159ed6d2bad48bba..65b378627dae0b9a914fa0fe933cc685877e58d9 100644 (file)
@@ -66,7 +66,7 @@ RESULT eBouquet::moveService(const eServiceReference &ref, unsigned int pos)
 
 RESULT eBouquet::flushChanges()
 {
-       FILE *f=fopen(m_path.c_str(), "wt");
+       FILE *f=fopen((CONFIGDIR"/enigma2/"+m_filename).c_str(), "w");
        if (!f)
                return -1;
        if ( fprintf(f, "#NAME %s\r\n", m_bouquet_name.c_str()) < 0 )
@@ -103,11 +103,18 @@ RESULT eBouquet::flushChanges()
        return 0;
 err:
        fclose(f);
-       eDebug("couldn't write file %s", m_path.c_str());
+       eDebug("couldn't write file %s", m_filename.c_str());
        return -1;
 }
 
+RESULT eBouquet::setListName(const std::string &name)
+{
+       m_bouquet_name = name;
+       return 0;
+}
+
 eDVBService::eDVBService()
+       :m_flags(0)
 {
 }
 
@@ -132,7 +139,7 @@ void eDVBService::genSortName()
        makeUpper(m_service_name_sort);
        while ((!m_service_name_sort.empty()) && m_service_name_sort[0] == ' ')
                m_service_name_sort.erase(0, 1);
-       
+
                /* put unnamed services at the end, not at the beginning. */
        if (m_service_name_sort.empty())
                m_service_name_sort = "\xFF";
@@ -140,7 +147,7 @@ void eDVBService::genSortName()
 
 RESULT eDVBService::getName(const eServiceReference &ref, std::string &name)
 {
-       if (!ref.name.empty())  
+       if (!ref.name.empty())
                name = ref.name; // use renamed service name..
        else if (!m_service_name.empty())
                name = m_service_name;
@@ -187,7 +194,10 @@ int eDVBService::checkFilter(const eServiceReferenceDVB &ref, const eDVBChannelQ
                res = 0;
                break;
        case eDVBChannelQuery::tSatellitePosition:
-               res = (ref.getDVBNamespace().get() >> 16) == query.m_int;
+               res = ((unsigned int)ref.getDVBNamespace().get())>>16 == (unsigned int)query.m_int;
+               break;
+       case eDVBChannelQuery::tFlags:
+               res = (m_flags & query.m_int) == query.m_int;
                break;
        case eDVBChannelQuery::tChannelID:
        {
@@ -202,6 +212,9 @@ int eDVBService::checkFilter(const eServiceReferenceDVB &ref, const eDVBChannelQ
        case eDVBChannelQuery::tOR:
                res = checkFilter(ref, *query.m_p1) || checkFilter(ref, *query.m_p2);
                break;
+       case eDVBChannelQuery::tAny:
+               res = 1;
+               break;
        }
 
        if (query.m_inverse)
@@ -220,18 +233,32 @@ int eDVBService::getCachePID(cacheID id)
 
 void eDVBService::setCachePID(cacheID id, int pid)
 {
-       m_cache[id] = pid;
+       if (pid == -1)
+               m_cache.erase(id);
+       else
+               m_cache[id] = pid;
 }
 
 DEFINE_REF(eDVBDB);
 
        /* THIS CODE IS BAD. it should be replaced by somethine better. */
-void eDVBDB::load()
+void eDVBDB::reloadServicelist()
 {
        eDebug("---- opening lame channel db");
-       FILE *f=fopen("lamedb", "rt");
+       FILE *f=fopen(CONFIGDIR"/enigma2/lamedb", "rt");
        if (!f)
+       {
+               struct stat s;
+               if ( !stat("lamedb", &s) )
+               {
+                       if ( !stat(CONFIGDIR"/enigma2", &s) )
+                       {
+                               rename("lamedb", CONFIGDIR"/enigma2/lamedb" );
+                               reloadServicelist();
+                       }
+               }
                return;
+       }
        char line[256];
        if ((!fgets(line, 256, f)) || strncmp(line, "eDVB services", 13))
        {
@@ -279,7 +306,8 @@ void eDVBDB::load()
                                sat.symbol_rate = symbol_rate;
                                sat.polarisation = polarisation;
                                sat.fec = fec;
-                               sat.orbital_position = orbital_position;
+                               sat.orbital_position =
+                                       orbital_position < 0 ? orbital_position + 3600 : orbital_position;
                                sat.inversion = inversion;
                                feparm->setDVBS(sat);
                        } else if (line[1]=='t')
@@ -296,13 +324,21 @@ void eDVBDB::load()
                                ter.guard_interval = guard_interval;
                                ter.hierarchy = hierarchy;
                                ter.inversion = inversion;
-                               
                                feparm->setDVBT(ter);
                        } else if (line[1]=='c')
                        {
-                               int frequency, symbol_rate, inversion=0, modulation=3;
-                               sscanf(line+2, "%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation);
-//                             t.setCable(frequency, symbol_rate, inversion, modulation);
+                               eDVBFrontendParametersCable cab;
+                               int frequency, symbol_rate,
+                                       inversion=eDVBFrontendParametersCable::Inversion::Unknown,
+                                       modulation=eDVBFrontendParametersCable::Modulation::Auto,
+                                       fec_inner=eDVBFrontendParametersCable::FEC::fAuto;
+                               sscanf(line+2, "%d:%d:%d:%d:%d", &frequency, &symbol_rate, &inversion, &modulation, &fec_inner);
+                               cab.frequency = frequency;
+                               cab.fec_inner = fec_inner;
+                               cab.inversion = inversion;
+                               cab.symbol_rate = symbol_rate;
+                               cab.modulation = modulation;
+                               feparm->setDVBC(cab);
                        }
                }
                addChannelToList(channelid, feparm);
@@ -344,11 +380,10 @@ void eDVBDB::load()
 
                s->m_service_name = line;
                s->genSortName();
-                
+
                fgets(line, 256, f);
                if (strlen(line))
                        line[strlen(line)-1]=0;
-
                std::string str=line;
 
                if (str[1]!=':')        // old ... (only service_provider)
@@ -395,10 +430,10 @@ void eDVBDB::load()
        fclose(f);
 }
 
-void eDVBDB::save()
+void eDVBDB::saveServicelist()
 {
        eDebug("---- saving lame channel db");
-       FILE *f=fopen("lamedb", "wt");
+       FILE *f=fopen(CONFIGDIR"/enigma2/lamedb", "w");
        int channels=0, services=0;
        if (!f)
                eFatal("couldn't save lame channel db!");
@@ -414,11 +449,13 @@ void eDVBDB::save()
                                chid.transport_stream_id.get(), chid.original_network_id.get());
                eDVBFrontendParametersSatellite sat;
                eDVBFrontendParametersTerrestrial ter;
+               eDVBFrontendParametersCable cab;
                if (!ch.m_frontendParameters->getDVBS(sat))
                {
                        fprintf(f, "\ts %d:%d:%d:%d:%d:%d\n",
                                sat.frequency, sat.symbol_rate,
-                               sat.polarisation, sat.fec, sat.orbital_position,
+                               sat.polarisation, sat.fec,
+                               sat.orbital_position > 1800 ? sat.orbital_position - 3600 : sat.orbital_position,
                                sat.inversion);
                }
                if (!ch.m_frontendParameters->getDVBT(ter))
@@ -428,6 +465,11 @@ void eDVBDB::save()
                                ter.code_rate_LP, ter.modulation, ter.transmission_mode,
                                ter.guard_interval, ter.hierarchy, ter.inversion);
                }
+               if (!ch.m_frontendParameters->getDVBC(cab))
+               {
+                       fprintf(f, "\tc %d:%d:%d:%d:%d\n",
+                               cab.frequency, cab.symbol_rate, cab.inversion, cab.modulation, cab.fec_inner);
+               }
                fprintf(f, "/\n");
                channels++;
        }
@@ -444,6 +486,7 @@ void eDVBDB::save()
                                0);
 
                fprintf(f, "%s\n", i->second->m_service_name.c_str());
+
                fprintf(f, "p:%s", i->second->m_provider_name.c_str());
 
                // write cached pids
@@ -456,6 +499,9 @@ void eDVBDB::save()
                        ca != i->second->m_ca.end(); ++ca)
                        fprintf(f, ",C:%04x", *ca);
 
+               if (i->second->m_flags)
+                       fprintf(f, ",f:%x", i->second->m_flags);
+
                fprintf(f, "\n");
                services++;
        }
@@ -481,15 +527,24 @@ void eDVBDB::loadBouquet(const char *path)
                return;
        }
        eBouquet &bouquet = m_bouquets[bouquet_name];
-       bouquet.m_path = path;
+       bouquet.m_filename = bouquet_name;
        std::list<eServiceReference> &list = bouquet.m_services;
        list.clear();
 
-       eDebug("loading bouquet... %s", path);
-       FILE *fp=fopen(path, "rt");
+       std::string p = CONFIGDIR"/enigma2/";
+       p+=path;
+       eDebug("loading bouquet... %s", p.c_str());
+       FILE *fp=fopen(p.c_str(), "rt");
        int entries=0;
        if (!fp)
        {
+               struct stat s;
+               if ( !stat(path, &s) )
+               {
+                       rename(path, p.c_str() );
+                       loadBouquet(path);
+                       return;
+               }
                eDebug("failed to open.");
                if ( strstr(path, "bouquets.tv") )
                {
@@ -530,18 +585,17 @@ void eDVBDB::loadBouquet(const char *path)
                                }
                                if ( (tmp.flags&eServiceReference::flagDirectory) == eServiceReference::flagDirectory )
                                {
-                                       std::string str = tmp.path;
-                                       unsigned int pos = str.rfind('/');
+                                       unsigned int pos = tmp.path.rfind('/');
                                        if ( pos != std::string::npos )
-                                               str.erase(0, pos+1);
-                                       if (str.empty())
+                                               tmp.path.erase(0, pos+1);
+                                       if (tmp.path.empty())
                                        {
                                                eDebug("Bouquet load failed.. no filename given..");
                                                continue;
                                        }
                                        loadBouquet(tmp.path.c_str());
                                        char buf[256];
-                                       snprintf(buf, 256, "(type == %d) FROM BOUQUET \"%s\" ORDER BY bouquet", tmp.data[0], str.c_str());
+                                       snprintf(buf, 256, "(type == %d) FROM BOUQUET \"%s\" ORDER BY bouquet", tmp.data[0], tmp.path.c_str());
                                        tmp.path = buf;
                                }
                                list.push_back(tmp);
@@ -563,15 +617,16 @@ void eDVBDB::loadBouquet(const char *path)
        eDebug("%d entries in Bouquet %s", entries, bouquet_name.c_str());
 }
 
-void eDVBDB::loadBouquets()
+void eDVBDB::reloadBouquets()
 {
+       m_bouquets.clear();
        loadBouquet("bouquets.tv");
        loadBouquet("bouquets.radio");
 // create default bouquets when missing
        if ( m_bouquets.find("userbouquet.favourites.tv") == m_bouquets.end() )
        {
                eBouquet &b = m_bouquets["userbouquet.favourites.tv"];
-               b.m_path = "userbouquet.favourites.tv";
+               b.m_filename = "userbouquet.favourites.tv";
                b.m_bouquet_name = "Favourites (TV)";
                b.flushChanges();
                eServiceReference ref;
@@ -587,14 +642,14 @@ void eDVBDB::loadBouquets()
        if ( m_bouquets.find("userbouquet.favourites.radio") == m_bouquets.end() )
        {
                eBouquet &b = m_bouquets["userbouquet.favourites.radio"];
-               b.m_path = "userbouquet.favourites.radio";
+               b.m_filename = "userbouquet.favourites.radio";
                b.m_bouquet_name = "Favourites (Radio)";
                b.flushChanges();
                eServiceReference ref;
                memset(ref.data, 0, sizeof(ref.data));
                ref.type=1;
                ref.flags=7;
-               ref.data[0]=1;
+               ref.data[0]=2;
                ref.path="(type == 2) FROM BOUQUET \"userbouquet.favourites.radio\" ORDER BY bouquet";
                eBouquet &parent = m_bouquets["bouquets.radio"];
                parent.m_services.push_back(ref);
@@ -602,15 +657,171 @@ void eDVBDB::loadBouquets()
        }
 }
 
+eDVBDB *eDVBDB::instance;
+
 eDVBDB::eDVBDB()
 {
-       load();
-       loadBouquets();
+       instance = this;
+       reloadServicelist();
 }
 
 eDVBDB::~eDVBDB()
 {
-//     save();
+       instance=NULL;
+}
+
+RESULT eDVBDB::removeService(const eServiceReference &ref)
+{
+       if (ref.type == eServiceReference::idDVB)
+       {
+               eServiceReferenceDVB &service = (eServiceReferenceDVB&)ref;
+               std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator it(m_services.find(service));
+               if (it != m_services.end())
+               {
+                       m_services.erase(it);
+                       return 0;
+               }
+       }
+       return -1;
+}
+
+RESULT eDVBDB::removeServices(int dvb_namespace, int tsid, int onid, unsigned int orb_pos)
+{
+       return removeServices(eDVBChannelID(eDVBNamespace(dvb_namespace), eTransportStreamID(tsid), eOriginalNetworkID(onid)), orb_pos);
+}
+
+RESULT eDVBDB::removeServices(eDVBChannelID chid, unsigned int orbpos)
+{
+       RESULT ret=-1;
+       eDVBNamespace eNs;
+       eTransportStreamID eTsid;
+       eOriginalNetworkID eOnid;
+       std::map<eDVBChannelID, channel>::iterator it(m_channels.begin());
+       std::set<eDVBChannelID> removed_chids;
+       while (it != m_channels.end())
+       {
+               const eDVBChannelID &ch = it->first;
+               bool remove=true;
+               int system;
+               it->second.m_frontendParameters->getSystem(system);
+               if ( orbpos != 0xFFFFFFFF && system == iDVBFrontend::feSatellite )
+               {
+                       eDVBFrontendParametersSatellite sat;
+                       it->second.m_frontendParameters->getDVBS(sat);
+                       if ((unsigned int)sat.orbital_position != orbpos)
+                               remove=false;
+               }
+               if ( remove && chid.dvbnamespace != eNs && chid.dvbnamespace != ch.dvbnamespace )
+                       remove=false;
+               if ( remove && chid.original_network_id != eOnid && chid.original_network_id != ch.original_network_id )
+                       remove=false;
+               if ( remove && chid.transport_stream_id != eTsid && chid.transport_stream_id != ch.transport_stream_id )
+                       remove=false;
+               if ( remove )
+               {
+                       eDebug("remove %08x %04x %04x",
+                               ch.dvbnamespace.get(),
+                               ch.original_network_id.get(),
+                               ch.transport_stream_id.get());
+                       removed_chids.insert(it->first);
+                       m_channels.erase(it++);
+               }
+               else
+                       ++it;
+       }
+       if (!removed_chids.empty())
+       {
+               std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator service(m_services.begin());
+               while(service != m_services.end())
+               {
+                       eDVBChannelID chid;
+                       service->first.getChannelID(chid);
+                       std::set<eDVBChannelID>::iterator it(removed_chids.find(chid));
+                       if (it != removed_chids.end())
+                               m_services.erase(service++);
+                       else
+                               ++service;
+                       ret=0;
+               }
+       }
+       return ret;
+}
+
+RESULT eDVBDB::addFlag(const eServiceReference &ref, unsigned int flagmask)
+{
+       if (ref.type == eServiceReference::idDVB)
+       {
+               eServiceReferenceDVB &service = (eServiceReferenceDVB&)ref;
+               std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator it(m_services.find(service));
+               if (it != m_services.end())
+                       it->second->m_flags |= ~flagmask;
+               return 0;
+       }
+       return -1;
+}
+
+RESULT eDVBDB::removeFlag(const eServiceReference &ref, unsigned int flagmask)
+{
+       if (ref.type == eServiceReference::idDVB)
+       {
+               eServiceReferenceDVB &service = (eServiceReferenceDVB&)ref;
+               std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator it(m_services.find(service));
+               if (it != m_services.end())
+                       it->second->m_flags &= ~flagmask;
+               return 0;
+       }
+       return -1;
+}
+
+RESULT eDVBDB::removeFlags(unsigned int flagmask, int dvb_namespace, int tsid, int onid, unsigned int orb_pos)
+{
+       return removeFlags(flagmask, eDVBChannelID(eDVBNamespace(dvb_namespace), eTransportStreamID(tsid), eOriginalNetworkID(onid)), orb_pos);
+}
+
+RESULT eDVBDB::removeFlags(unsigned int flagmask, eDVBChannelID chid, unsigned int orbpos)
+{
+       eDVBNamespace eNs;
+       eTransportStreamID eTsid;
+       eOriginalNetworkID eOnid;
+       std::map<eDVBChannelID, channel>::iterator it(m_channels.begin());
+       std::set<eDVBChannelID> removed_chids;
+       while (it != m_channels.end())
+       {
+               const eDVBChannelID &ch = it->first;
+               bool remove=true;
+               int system;
+               it->second.m_frontendParameters->getSystem(system);
+               if ( orbpos != 0xFFFFFFFF && system == iDVBFrontend::feSatellite )
+               {
+                       eDVBFrontendParametersSatellite sat;
+                       it->second.m_frontendParameters->getDVBS(sat);
+                       if ((unsigned int)sat.orbital_position != orbpos)
+                               remove=false;
+               }
+               if ( remove && chid.dvbnamespace != eNs && chid.dvbnamespace != ch.dvbnamespace )
+                       remove=false;
+               if ( remove && chid.original_network_id != eOnid && chid.original_network_id != ch.original_network_id )
+                       remove=false;
+               if ( remove && chid.transport_stream_id != eTsid && chid.transport_stream_id != ch.transport_stream_id )
+                       remove=false;
+               if ( remove )
+                       removed_chids.insert(it->first);
+               ++it;
+       }
+       if (!removed_chids.empty())
+       {
+               std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator service(m_services.begin());
+               while(service != m_services.end())
+               {
+                       eDVBChannelID chid;
+                       service->first.getChannelID(chid);
+                       std::set<eDVBChannelID>::iterator it(removed_chids.find(chid));
+                       if (it != removed_chids.end())
+                               service->second->m_flags &= ~flagmask;
+                       ++service;
+               }
+       }
+       return 0;
 }
 
 RESULT eDVBDB::addChannelToList(const eDVBChannelID &id, iDVBFrontendParameters *feparm)
@@ -642,7 +853,9 @@ RESULT eDVBDB::getChannelFrontendData(const eDVBChannelID &id, ePtr<iDVBFrontend
 
 RESULT eDVBDB::addService(const eServiceReferenceDVB &serviceref, eDVBService *service)
 {
-       m_services.insert(std::pair<eServiceReferenceDVB, ePtr<eDVBService> >(serviceref, service));
+       std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator it(m_services.find(serviceref));
+       if (it == m_services.end())
+               m_services.insert(std::pair<eServiceReferenceDVB, ePtr<eDVBService> >(serviceref, service));
        return 0;
 }
 
@@ -661,7 +874,7 @@ RESULT eDVBDB::getService(const eServiceReferenceDVB &reference, ePtr<eDVBServic
 
 RESULT eDVBDB::flush()
 {
-       save();
+       saveServicelist();
        return 0;
 }
 
@@ -717,6 +930,22 @@ RESULT eDVBDB::startQuery(ePtr<iDVBChannelListQuery> &query, eDVBChannelQuery *q
        return 0;
 }
 
+eServiceReference eDVBDB::searchReference(int tsid, int onid, int sid)
+{
+       eServiceID Sid(sid);
+       eTransportStreamID Tsid(tsid);
+       eOriginalNetworkID Onid(onid);
+       for (std::map<eServiceReferenceDVB, ePtr<eDVBService> >::iterator sit(m_services.begin());
+               sit != m_services.end(); ++sit)
+       {
+               if (sit->first.getTransportStreamID() == Tsid &&
+                       sit->first.getOriginalNetworkID() == Onid &&
+                       sit->first.getServiceID() == Sid)
+                       return sit->first;
+       }
+       return eServiceReference();
+}
+
 DEFINE_REF(eDVBDBQueryBase);
 
 eDVBDBQueryBase::eDVBDBQueryBase(eDVBDB *db, const eServiceReference &source, eDVBChannelQuery *query)
@@ -829,7 +1058,15 @@ RESULT eDVBDBListQuery::getNextResult(eServiceReferenceDVB &ref)
 int eDVBDBListQuery::compareLessEqual(const eServiceReferenceDVB &a, const eServiceReferenceDVB &b)
 {
        if ( m_query->m_sort == eDVBChannelQuery::tSatellitePosition )
-               return (a.getDVBNamespace().get() >> 16) < (b.getDVBNamespace().get() >> 16);
+       {
+               int x = (a.getDVBNamespace().get() >> 16);
+               int y = (b.getDVBNamespace().get() >> 16);
+               if ( x > 1800 )
+                       x -= 3600;
+               if ( y > 1800 )
+                       y -= 3600;
+               return x < y;
+       }
        return a.name < b.name;
 }
 
@@ -854,19 +1091,12 @@ eDVBDBSatellitesQuery::eDVBDBSatellitesQuery(eDVBDB *db, const eServiceReference
                        {
                                eServiceReferenceDVB ref;
                                ref.setDVBNamespace(dvbnamespace);
-                               char buf[64];
-// TODO get real satellite name..
-// but i dont like to parse the satellites.xml here.. and in the python part
-                               int tpos = dvbnamespace>>16;
-                               if (tpos > 1800) // west
-                                       snprintf(buf, 64, "Services (%3.1fW)", (0 - (tpos - 3600)) / 10.0);
-                               else
-                                       snprintf(buf, 64, "Services (%3.1fE)", tpos / 10.0);
-                               ref.name=buf;
-                               snprintf(buf, 64, "(satellitePosition == %d) && ", dvbnamespace>>16);
+                               ref.flags=eServiceReference::flagDirectory;
+                               char buf[128];
+                               snprintf(buf, 128, "(satellitePosition == %d) && ", dvbnamespace>>16);
+
                                ref.path=buf+source.path;
                                unsigned int pos=ref.path.find("FROM");
-                               ref.flags=eServiceReference::flagDirectory;
                                ref.path.erase(pos);
                                ref.path+="ORDER BY name";
 //                             eDebug("ref.path now %s", ref.path.c_str());
@@ -877,11 +1107,14 @@ eDVBDBSatellitesQuery::eDVBDBSatellitesQuery(eDVBDB *db, const eServiceReference
                                ref.path.erase(pos+5);
                                ref.path+="PROVIDERS ORDER BY name";
 //                             eDebug("ref.path now %s", ref.path.c_str());
-                               if (tpos > 1800) // west
-                                       snprintf(buf, 64, "Providers (%3.1fW)", (0 - (tpos - 3600)) / 10.0);
-                               else
-                                       snprintf(buf, 64, "Providers (%3.1fE)", tpos / 10.0);
-                               ref.name=buf;
+                               m_list.push_back(ref);
+
+                               snprintf(buf, 128, "(satellitePosition == %d) && (flags == %d) && ", dvbnamespace>>16, eDVBService::dxNewFound);
+                               ref.path=buf+source.path;
+                               pos=ref.path.find("FROM");
+                               ref.path.erase(pos);
+                               ref.path+="ORDER BY name";
+//                             eDebug("ref.path now %s", ref.path.c_str());
                                m_list.push_back(ref);
                        }
                }
@@ -945,6 +1178,8 @@ static int decodeType(const std::string &type)
                return eDVBChannelQuery::tSatellitePosition;
        else if (type == "channelID")
                return eDVBChannelQuery::tChannelID;
+       else if (type == "flags")
+               return eDVBChannelQuery::tFlags;
        else
                return -1;
 }
@@ -953,6 +1188,13 @@ static int decodeType(const std::string &type)
 RESULT parseExpression(ePtr<eDVBChannelQuery> &res, std::list<std::string>::const_iterator begin, std::list<std::string>::const_iterator end)
 {
        std::list<std::string>::const_iterator end_of_exp;
+       
+       if (begin == end)
+       {
+               eDebug("empty expression!");
+               return 0;
+       }
+       
        if (*begin == "(")
        {
                end_of_exp = begin;
@@ -1169,6 +1411,14 @@ RESULT eDVBChannelQuery::compile(ePtr<eDVBChannelQuery> &res, std::string query)
                /* now we recursivly parse that. */
        int r = parseExpression(res, tokens.begin(), tokens.end());
        
+               /* we have an empty (but valid!) expression */
+       if (!r && !res)
+       {
+               res = new eDVBChannelQuery();
+               res->m_inverse = 0;
+               res->m_type = eDVBChannelQuery::tAny;
+       }
+       
        if (res)
        {
                res->m_sort = sort;