Read a line from xml file using C++

Question

My XML File has:

< Package > xmlMetadata < /Package >

I am searching for a tag in this file and the text between the startin

Answer 1

This is not the way you should parse an XML file, but since you don't want to use a parser library this code might get you started.

File: demo.xml

   File_Navigate




   
      xmlMetadata
   
   

      xmlMetadata.h
   
   
      C:\Dependency\xmlMetadata\xmlMetadata.h
   
   
      xmlMetadata.cpp
   
   
      C:\Dependency\xmlMetadata\xmlMetadata.cpp
   



   
      xmlMetadata1
   
   

      xmlMetadata1.h
   
   
      C:\Dependency\xmlMetadata\xmlMetadata1.h
   
   
      xmlMetadata1.cpp
   
   
      C:\Dependency\xmlMetadata\xmlMetadata1.cpp
   

The basic idea of the code is while you are reading each line of the file, strip the white spaces that are in the beginning and store the new-stripped-string into tmp, and then try to match it to one of the tags you are looking for. Once you find the begin-tag, keep printing the following lines until the close-tag is found.

File: parse.cpp

#include 
#include 
#include 

using namespace std;

int main()
{
    string line;
    ifstream in("demo.xml");

    bool begin_tag = false;
    while (getline(in,line))
    {
        std::string tmp; // strip whitespaces from the beginning
        for (int i = 0; i < line.length(); i++)
        {
            if (line[i] == ' ' && tmp.size() == 0)
            {
            }
            else
            {
                tmp += line[i];
            }
        }

        //cout << "-->" << tmp << "<--" << endl;

        if (tmp == "")
        {
            //cout << "Found " << endl;
            begin_tag = true;
            continue;
        }
        else if (tmp == "")
        {
            begin_tag = false;
            //cout << "Found " << endl;
        }

        if (begin_tag)
        {
            cout << tmp << endl;
        }
    }
}

Outputs:

xmlMetadata
xmlMetadata1