底层CGIO接口读取cgns文件信息

  1 #include <iostream>
  2 #include<iomanip>
  3 #include "cgns_io.h"
  4 
  5 using namespace std;
  6 
  7 
  8 void readChildrenByIdentifier(int index_file, double id) {
  9     int result;
 10     char errorMessage[100];
 11     /**
 12      * @brief 获取节点的子节点数
 13     **/
 14     int numOfChild = 0;
 15     result = cgio_number_children(index_file, id, &numOfChild);
 16     if (CGIO_ERR_NONE != result) {
 17         cgio_error_message(errorMessage);
 18         cout << "GetChildNum Of Node(id = " << setprecision(50) << id << ") Error: " << errorMessage << endl;
 19     }
 20     else {
 21         char name[50];
 22         cgio_get_name(index_file, id, name);
 23         cout << "ChildNum Of Node(name = " << name << ") = " << numOfChild << endl;
 24     }
 25     /**
 26      * @brief 如果没有子节点则返回
 27     **/
 28     if (numOfChild < 1) {
 29         return;
 30     }
 31     /**
 32      * @brief 获取节点的子节点的标识符、名称等信息
 33     **/
 34     int numOfReturnChild;
 35     double* childIds = new double[numOfChild];
 36     char** childNames = new char*[numOfChild];
 37 
 38     for (int i = 0; i < numOfChild; i++)
 39     {
 40         childNames[i] = new char[50];
 41     }
 42     result = cgio_children_ids(index_file, id, 1, numOfChild, &numOfReturnChild, childIds);
 43     if (CGIO_ERR_NONE != result) {
 44         cgio_error_message(errorMessage);
 45         cout << "GetChildIds Error: " << errorMessage << endl;
 46     }
 47     else {
 48         for (int i = 1; i <= numOfReturnChild; i++)
 49         {
 50             char name[50]; char label[50]; char type[5];
 51             cgio_get_name(index_file, childIds[i - 1], name);
 52             cgio_get_name(index_file, childIds[i - 1], label);
 53             cgio_get_data_type(index_file, childIds[i - 1], type);
 54             //注意double类型数据用cout输出时的格式
 55             //cout << "Children[" << i << "] Id = " << setprecision(50) << childIds[i - 1] << ", Name = " << name << ", Label = " << label << ", Type = " << type << endl;
 56             //cout << "Name = " << name << endl;
 57 
 58             /**
 59              * @brief 继续迭代获取子节点
 60             **/
 61             readChildrenByIdentifier(index_file, childIds[i - 1]);
 62         }
 63     }
 64 }
 65 
 66 int main() {
 67     int result;
 68     char errorMessage[100];
 69     string filename = "F:/SomeData/data_631meshfile_formatcgns/axie_new_volume.cgns";
 70 
 71 
 72     /**
 73      * @brief 获取文件类型ADF\HDF5\ADF2
 74     **/
 75     int file_type;
 76     result = cgio_check_file(filename.c_str(), &file_type);
 77     if (CGIO_ERR_NONE == result) {
 78         switch (file_type)
 79         {
 80         case CGIO_FILE_ADF:
 81             cout << "FileType: ADF;" << endl;
 82             break;
 83         case CGIO_FILE_HDF5:
 84             cout << "FileType: HDF5;" << endl;
 85             break;
 86         case CGIO_FILE_ADF2:
 87             cout << "FileType: ADF2;" << endl;
 88             break;
 89         default:
 90             cout << "未知的文件格式;" << endl;
 91             break;
 92         }
 93     }
 94     else
 95     {
 96         cgio_error_message(errorMessage);
 97         cout << "Get File Type Error: " << errorMessage << endl;
 98     }
 99 
100     /**
101      * @brief 获取文件的标识符
102     **/
103     int index_file;
104     result = cgio_open_file(filename.c_str(), CGIO_MODE_READ, file_type, &index_file);
105     if (CGIO_ERR_NONE != result) {
106         cgio_error_message(errorMessage);
107         cout << "Open Error: " << errorMessage << endl;
108     }
109     else {
110         cout << "Success to open cgns file!" << endl;
111     }
112 
113     /**
114      * @brief 获取根节点的标识符
115     **/
116     double rootid;
117     result = cgio_get_root_id(index_file, &rootid);
118     if (CGIO_ERR_NONE != result) {
119         cgio_error_message(errorMessage);
120         cout << "GetRootId Error: " << errorMessage << endl;
121     }
122     else {
123         cout << "rootid = " << setprecision(50) << rootid << endl;
124     }
125 
126     
127     readChildrenByIdentifier(index_file, rootid);
128 
129     
130     cgio_close_file(index_file);
131 
132     return 0;
133 }

运行结果：