tinyXML的用法，用于解析gpx文件

  1 StateCode ReadTrackFromGpx(Track* track,char*  Path)
  2 {
  3      cout<<"开始解析gpx文件..."<<endl;
  4      //读取gpx文件 
  5      TiXmlDocument xmlDoc( Path);
  6      xmlDoc.LoadFile();
  7      //指向根节点的元素指针
  8      TiXmlElement* xmlRootElement;
  9      //指向子节点的元素指针
 10      TiXmlElement* xmlSubElement;
 11      //节点属性
 12      TiXmlAttribute* rootAttr ;
 13     // TiXmlNode* pNode = NULL;
 14 
 15      //获取根节点
 16     xmlRootElement = xmlDoc.RootElement();
 17     if (xmlRootElement == NULL)
 18     {
 19         return 1;
 20     }
 21     //cout<<"root element is:"<<xmlRootElement->Value()<<endl;
 22     //根节点的属性
 23      rootAttr = xmlRootElement->FirstAttribute();
 24     //cout<<"There is its attributes："<<endl;
 25     while(rootAttr!= NULL)
 26     {
 27           //cout<<rootAttr->Name()<<":"<<rootAttr->Value()<<endl;
 28           rootAttr = rootAttr->Next();
 29     }
 30 
 31     xmlSubElement  = xmlRootElement->FirstChildElement();
 32     if (xmlSubElement == NULL)
 33     {
 34         return GPX_FILE_EMPTY;//gpx文件为空
 35     }
 36     while(xmlSubElement!=NULL)
 37     {
 38              
 39             if(strcmp(xmlSubElement->Value(),"trk")==0)
 40                    break;
 41             else
 42                 xmlSubElement = xmlSubElement->NextSiblingElement();
 43     }
 44     if (xmlSubElement == NULL)
 45     {
 46         return GPX_FILE_TRACK_NOEXIT;//gpx文件中不存在轨迹数据
 47     }
 48     //cout<<"Next is the Trajectory data:"<<endl;
 49 
 50     xmlSubElement = xmlSubElement->FirstChildElement();
 51     while(xmlSubElement!=NULL)
 52     {
 53          if (strcmp(xmlSubElement->Value(),"trkseg")!=0)
 54              //输出name和number
 55              cout<<xmlSubElement->Value()<<":"<<xmlSubElement->GetText()<<endl;
 56          else
 57              break;
 58          xmlSubElement = xmlSubElement->NextSiblingElement();
 59     }
 60 
 61     if (xmlSubElement == NULL)
 62     {
 63         return GPX_FILE_TRACK_NOEXIT;//gpx文件中不存在轨迹数据
 64     }
 65 
 66     xmlSubElement = xmlSubElement->FirstChildElement();
 67     rootAttr = xmlSubElement->FirstAttribute();
 68     TiXmlElement* xmlNode=NULL;
 69     while(xmlSubElement!=NULL)
 70     {
 71         trackpoint onepoint;
 72         while(rootAttr!= NULL)
 73         {
 74             //输出经纬度
 75             //cout<<rootAttr->Name()<<":"<<rootAttr->Value()<<endl;    
 76             if (strcmp(rootAttr->Name(),"lat")==0)
 77                 onepoint.lat = stringToNum<double> (rootAttr->Value());
 78             if (strcmp(rootAttr->Name(),"lon")==0)
 79                 onepoint.lon = stringToNum<double> (rootAttr->Value());
 80             rootAttr = rootAttr->Next();
 81          }
 82         xmlNode = xmlSubElement->FirstChildElement();
 83         while (xmlNode!=NULL)
 84         {
 85             //高程（有的gpx文件中没有）和时间
 86             //cout<<xmlNode->Value()<<":"<<xmlNode->GetText()<<endl;
 87             if (strcmp(xmlNode->Value(),"ele")==0)
 88                     onepoint.ele = stringToNum<double> (xmlNode->GetText());
 89             if (strcmp(xmlNode->Value(),"time")==0)
 90                 onepoint.time = xmlNode->GetText();
 91             xmlNode = xmlNode->NextSiblingElement();
 92         }
 93 
 94         xmlSubElement = xmlSubElement->NextSiblingElement();
 95         if(xmlSubElement!=NULL)
 96                rootAttr = xmlSubElement->FirstAttribute();
 97 
 98         track->addPoint(onepoint);
 99     } 
100     track->setStarttime(track->getPointSet()[0].time);//获取开始时间
101     track->setEndtime(track->getPointSet().back().time);//获取结束时间
102     cout<<"解析结束...";
103     xmlDoc.Clear();
104     return GPX_FILE_PASER_SUCCEED;
105 }