[C++] Datei auslesen bis Zeichen

[...]

   "security": {
      "cookie_behavior": 0
   },
   "session": {
      "restore_on_startup": 4,
      [B]"urls_to_restore_on_startup": [ "http://powerforen.de/forum/index.php", "http://www.youtube.com/" ][/B]
   },
   "webkit": {
      "webprefs": {

      }
   }
}

"urls_to_restore_on_startup": [ "http://powerforen.de/forum/index.php", "http://www.youtube.com/" ]

"urls_to_restore_on_startup": [ "http://powerforen.de/forum/index.php", "http://www.youtube.com/"[B], "http://www.google.com" [/B]]

// [...]
	ifstream Datei("Preferences", ios::in);
	if (Datei.good())
	{
		string Puffer="";

		for(int i=1;i<=39;i++)
		{
		getline(Datei, Puffer);
		}
		cout << Puffer;
	}
	else
	{
		return 1;
	}
	getchar();
return 0;
}

// [...]
ifstream Datei("Preferences", ios::in);
if (Datei.good())
{
	string Puffer="";

	for(int i=1;i<=46;i++) //46 Zeilen in Preferences
	{
	getline(Datei, Puffer);
	}
// [...]

char *Puffer= //Position von "]"

        ifstream Pref("Preferences", ios::in);
	if (Pref.good())
	{
		string Inhalt("");

		for(int i=0; i<46; i++)
		{
		getline(Pref, Inhalt);
		}

		string::size_type loc =Inhalt.find("[", 0);
		cout << "Found \"[\" at " << loc << "." << endl;	
	}

		do
		{
			getline(Pref, Inhalt);
		}while(!Pref.eof());

string& insert ( size_t pos1, const string& str );

		string::size_type Urls = Inhalt.find("\"urls_to_restore_on_startup\"", 0);
		cout << "Found \"urls_to_restore_on_startup\" at " << Urls << "." << endl;

		string::size_type Klammer = Inhalt.find("]", 0);
		cout << "Found \"]\" at " << Klammer << "." << endl;

		Inhalt.insert((Klammer-1), ", \"http://www.google.com\"");

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main(int argc, char **argv[1])
{
	// argv[0] = "Google Chrome.exe"
	// argv[1] = "NewStartPage"

	ifstream Pref1("Preferences", ios::in);
	if (Pref1.good())
	{
		ofstream Pref2("Preferences.temp", ios::trunc); // must be .temp, other File is in use ;-) 
		if (Pref2.good())
		{
			string Inhalt="";

			for (int i=0; i<=37; i++)
			{
				getline(Pref1, Inhalt);
				Pref2 << "\n" << Inhalt;
			}
			cout << "Zeile vorher ist jetzt:" << Inhalt <<endl << endl;			
			getline(Pref1, Inhalt);
			cout << "Die wichtige Zeile ist jetzt:" << Inhalt <<endl << endl;

			string::size_type Urls = Inhalt.find("\"urls_to_restore_on_startup\"", 0);
			cout << "Found \"urls_to_restore_on_startup\" at " << Urls << "." << endl << endl;

			string::size_type Klammer = Inhalt.find("]", 0);
			cout << "Found \"]\" at " << Klammer << "." << endl << endl;

			Inhalt.insert((Klammer-1), ", \"http://www.google.com\"");

			cout << "Inhalt ist jetzt:" << Inhalt <<endl;
			Pref2 << "\n" << Inhalt;

			do
			{
				getline(Pref1, Inhalt);
				Pref2 << "\n" << Inhalt;
			}while(Pref1.eof())
		}
		else
		{
			return 1;
		}
	}
	else
	{
		return 1;
	}
	//getchar();
	return 0;
}

[...]
   "urls_to_restore_on_startup": [ "http://powerforen.de/forum/index.php", "http://www.youtube.com/" ]
   },
   "webkit": {
      "webprefs": {

      }
   }
}

 "restore_on_startup": 4,
      "urls_to_restore_on_startup": [ "http://powerforen.de/forum/index.php", "http://www.youtube.com/", "http://www.google.com" ]
   },
   "webkit": {
      "webprefs": {

      }
   }
}
[[B][I][U]942850 leere Zeile[/U][/I][/B]]

  long size;
  std::string fileContent;

  ifstream infile ("Preferences",ifstream::binary);
  ofstream outfile ("Preferences.temp",ofstream::binary);

  // get size of file
  infile.seekg(0,ifstream::end);
  size=infile.tellg();
  infile.seekg(0);

  // allocate memory for file content
  fileContent.resize(size);

  // read content of infile
  infile.read (&fileContent[0], size);

  // add new url
  string::size_type urlsPos = fileContent.find("\"urls_to_restore_on_startup\"", 0);

  string::size_type parenthesePos = fileContent.find("]", urlsPos);
  
  std::string newURL = ", \"[URL]http://www.google.de\"[/URL];

  fileContent.insert(parenthesePos - 1, newURL);

  // write to outfile
  outfile.write (&fileContent[0], size + newURL.size());
  
  outfile.close();
  infile.close();