Question

I am trying to parse xml with some simple C++ which has blocks like

 <mgrwt event="1">
    ...
    ...
    ...
    </mgrwt>

<mgrwt event="2">
    ...
    ...
    ...
 </mgrwt>

Now, I have a bash script which acts on each of these blocks – So, my question is, how can I loop inside the xml ( I do not need RapidXML or something similar though) so that to easily dump to a small temp file each block ?

My parser looks like

  bool begin_tag = false;
    while (getline(in,line))
    {
        std::string tmp; 
        tmp=line;
       if(line.find("<mgrwt event=")<=line.size()){
            cout<<line<<endl;
            begin_tag = true;
            continue;
        }
        else if (tmp == "</mgrwt>")
        {
            begin_tag = false;

        }

     }
}

thanks

Alex

Answer 1

I would recommend using an XML parser for reading XML files. Checkout expat, POCO XML or other libraries.

If you can’t for whatever reason, and the stuff you’re reading always looks exactly the same as in your sample with no other formatting variations, you also should use find() to detect the end of the block:

else if(line.find("</mgrwt>")<=line.size())
{
   begin_tag = false;
}