saving app setting

[kam hagh]

I want to save my app setting like this example:
[Properties]
ShowGeneralTab = 1
ShowFanTab = 1
ShowMonitoringTab = 1
ShowOnScreenDisplayTab = 1
ShowScreenCaptureTab = 1
ShowVideoCaptureTab = 1
ShowProfilesTab = 1
ShowUserInterfaceTab = 1
(got it from msiafterburner :|)

can anyone tell me how i can read it? like whenever i want to see the value of ShowGeneralTab what should i do? I already read the file tutorial on this site + tutorialspoint and still don't understand how i should do it, can anyone help me?!
hints, anything or just simply a code so i can think on it ?! :)

[minomic]

Hi, I don't know if there are already some libraries or other tools that do this, but you could write your own implementation: you read a line from the file and split it in two: the name of the property before the "=" and the value after the "=". Then you can check against the name of the property until you find the one you are looking for.

Maybe though there are better solutions...

[Smac89]

If the properties of the app is an object, you can write the entire object to a file and read it back again:

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

class Student {
public:
    char   FullName[40];
    char   CompleteAddress[120];
    char   Gender;
    double Age;
    bool   LivesInASingleParentHome;
};

int main() {
    Student one, two;
    strcpy(one.FullName, "Ernestine Waller");
    strcpy(one.CompleteAddress, "824 Larson Drv, Silver Spring, MD 20910");

    one.Gender = 'F';
    one.Age = 16.50;
    one.LivesInASingleParentHome = true;
    ofstream ofs("fifthgrade.ros", ios::binary);

    // Write to a file
    ofs.write((char *)&one, sizeof(one));
    ofs.close();

    // Read object from the file
    ifstream ifs("fifthgrade.ros", ios::binary);
    ifs.read((char *)&two, sizeof(two));
    ifs.close();

    cout << "Student Information\n";
    cout << "Student Name: " << two.FullName << endl;
    cout << "Address:      " << two.CompleteAddress << endl;
    

    if( two.Gender == 'f' || two.Gender == 'F' )
        cout << "Gender:       Female" << endl;
    else if( two.Gender == 'm' || two.Gender == 'M' )
	cout << "Gender:       Male" << endl;
    else
        cout << "Gender:       Unknown" << endl;


    cout << "Age:          " << two.Age << endl;
    if( two.LivesInASingleParentHome == true )
        cout << "Lives in a single parent home" << endl;
    else
        cout << "Doesn't live in a single parent home" << endl;
    cout << "\n";

    return 0;
}

Source: http://www.functionx.com/cpp/articles/serialization.htm

[kam hagh]

thanks minomics, i thought about that, but my main problem is not understanding what to do in c++ ! i can write pesudo code but can't turn it into c++ code :| ''

smacs thats goot options for struct/classes, i can turn mine into a struct of settings ! but what if i wanted to save like 6 structs, should i make 6 files?! can't i just put them in the same place?!

but i still would ike to know how to do the it the minomics way :) + i didn't know that i can just write a class too a file like that !

[kam hagh]

i don't want to sound like a lazy guy but i really don't know how to do that, im really bad with strings:) i know i can check line by line, but not sure how i can only check the first part and not the = 1 , maybe i can do seekg -3 back?! and do forward again ! is that a good way?

[minomic]

You can start from this:

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <string>
#include <sstream>
#include <vector>

void split(const std::string &s, char delim, std::vector<std::string> &elems) {
	std::stringstream ss(s);
	std::string item;
	while (std::getline(ss, item, delim)) {
		elems.push_back(item);
	}
}


int main() {
	std::string my_string = "Property=value";
	std::vector<std::string> my_vector;

	split(my_string, '=', my_vector);

	for (auto x : my_vector) {
		std::cout << x << std::endl;
	}
}

It shows you how to split a string at a specified delimiter (in this case it's the = sign). Once you have done this, it should be fairly simple.

[kam hagh]

:O thanks, im doing it know :)

[minomic]

Ok, let us know how it goes...

[dhayden]

strings already have split function?

No. He defined the split function at line 9.

[kam hagh]

yes i edited it, i didn't see it :)! + i didn't know getline can do that !

im super-super tired today, will do it tomorrow, but i can see how i should do that, i just simply get the line from file :) getline does the rest for me :)

[kam hagh]

sorry for long delay :) i got it working thanks !

[minomic]

Good! :)

[kam hagh]

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <string>
#include <sstream>
#include <vector>
#include <fstream>
using namespace std;
void split(const string &s, char delim, vector<string> &elems) {
    stringstream ss(s);
    string item;
    while (getline(ss, item, delim)) {
        elems.push_back(item);
    }
}


int main() {
    ifstream file("example.txt");
    vector<string> my_vector;

    string buff;

    while(getline(file,buff)){
        split(buff, '=', my_vector);

        for (auto x : my_vector) {
            cout << x << endl;
        }
    }
    file.close();
}

it starts from middle of my file and goes back to beginning and goes till end and stops, why does it get to middle first? i tried seekg(0) ! no difference!

edit: woops forgot the clear :) fixed it :D