C++ Road::getSpeedLimit方法代码示例

bool TrafficNetwork::saveToFile(const string out_prefix, bool newWeek){
	bool everythingOK = true;
	int metric = KPH; //save in KPH such that it can be used by external tool (and be human readable)
	std::vector<long> nIds;
	long crtId;
	char crtType;
	string out_fileName = (out_prefix+"_roads_stats.json");

	json_t *root = NULL;

	if(firstSaved){
		if(fileName != ""){
			json_error_t error;

			root = json_load_file(fileName.c_str(), 0, &error);

			if(!root){
				std::cout<<std::endl<<"WARNING: while opening "<<fileName<<" at line "<<error.line<<" - "<<error.text<<std::endl;
				root= NULL;
			}

			if(!json_is_object(root)){
				std::cout<<std::endl<<"WARNING: input file "<<fileName<<" has not the correct structure - expected root to be an object"<<std::endl;
				json_decref(root);
				root = NULL;
			}

			if(!root){
				std::cout<<"File "<<fileName<<" could not be using during saving process"<<std::endl<<"\t --> reverting to saving network based on stored data (possibility for loss of positional infos)"<<std::endl;
			}
		}

		if(!root){
			root = json_object();
			if ( root ) {
				json_object_set_new(root, "metric" ,json_integer(metric));
				json_t *_nodes = json_array();
				json_t *_roads = json_array();
				for(NodeVec::iterator it= nodes.begin() ; it!=nodes.end(); ++it){
					json_t * _node = json_object();
					crtId = (*it)->getId();
					crtType = (*it)->getType();
					json_object_set_new(_node,"id",json_integer(crtId));
					json_object_set_new(_node,"type",json_integer(crtType));
					json_array_append_new(_nodes,_node);
					nIds = (*it)->getNeighborsId();
					for(std::vector<long>::iterator jt = nIds.begin(); jt != nIds.end(); ++jt){
						Road r = *((*it)->roadTo(*jt));
						json_t * _road = json_object();
						json_object_set_new(_road,"name",json_string(r.getName().c_str()));
						json_object_set_new(_road,"startId",json_integer(crtId));
						json_object_set_new(_road,"endId",json_integer(r.getEndPoint()->getId()));
						json_object_set_new(_road,"speedLimit",json_integer(r.getSpeedLimit()*3.6)); //x3.6 to go from MPS to KPH
						json_object_set_new(_road,"length",json_real(r.getLength()/1000)); // /1000 to go from M to K
						json_object_set_new(_road,"nbBands",json_integer(r.getNbBands()));

						json_array_append_new(_roads,_road);
					}
				}
				json_object_set_new(root, "nodes" ,_nodes);
				json_object_set_new(root, "roads" ,_roads);
			}else{
				std::cout<<"ERROR: Could not create 'root' during saving process"<<std::endl;
				return false;
			}

		}
	}else{
		json_error_t error;

		root = json_load_file(out_fileName.c_str(), 0, &error);

		if(!root){
			std::cout<<std::endl<<"ERROR: while opening "<<out_fileName<<" at line "<<error.line<<" - "<<error.text<<std::endl;
			root= NULL;
			return false;
		}

		if(!json_is_object(root)){
			std::cout<<std::endl<<"ERROR: input file "<<fileName<<" has not the correct structure - expected root to be an object"<<std::endl;
			json_decref(root);
			root = NULL;
			return false;
		}
	}

	json_t *roadsInfos;
	if(monitered){
		bool first = false;
		if(firstSaved){
			roadsInfos = json_array();
			int nbRoads = json_array_size(json_object_get(root,"roads"));
			for(int i = 0; i < nbRoads; i++){
				json_array_append_new(roadsInfos,json_object());
			}
			json_object_set(root,"roadsInfos",roadsInfos);
			json_object_set_new(root,"timePrecision",json_integer(TIME_PRECISION));
			json_object_set_new(root,"time_index",json_integer(0));
			json_object_set_new(root,"driversCount_index",json_integer(1));
			firstSaved = false;
//.........这里部分代码省略.........