USB-C Charging on the PBP? - Printable Version

Code:
#include <iostream>

#include <fstream>

#include <sstream>

#include <iomanip>

#include <string>



using namespace std;



const string MASTER_PATH = "/sys/bus/i2c/devices/4-0022/typec/port0/";

const string DATA_ROLE_F = "data_role";

const string ORIENTATION_F = "orientation";

const string PORT_TYPE_F = "port_type";

const string POWER_OPERATION_MODE_F = "power_operation_mode";

const string POWER_ROLE_F = "power_role";

const string PREFERRED_ROLE_F = "preferred_role";

const string SUPPORTED_ACCESSORY_MODES_F = "supported_accessory_modes";

const string UEVENT_F = "uevent";

const string USB_POWER_DELIVERY_REVISION_F = "usb_power_delivery_revision";

const string USB_TYPEC_REVISION_F = "usb_typec_revision";

const string VCONN_SOURCE_F = "vconn_source";



constexpr int FILENAMES_SIZE = 4;

const string FILENAMES[FILENAMES_SIZE] = {ORIENTATION_F, DATA_ROLE_F, POWER_ROLE_F, POWER_OPERATION_MODE_F};

const string SHORTCUTS[FILENAMES_SIZE] = {"O", "DR", "PR", "POM"};



bool printFromFile(const int index);



int main()

{

    for(int i = 0; i < FILENAMES_SIZE; i++)

    {

        bool result = printFromFile(i);

        if(i < FILENAMES_SIZE - 1){

            if(i == 2 || i == 3 || i == 6)

                cout << endl;

        }

        if(!result)

            break;

    }

    cout << endl;

    return 0;

}



bool printFromFile(const int index)

{

    cout << SHORTCUTS[index] << ":";

    ifstream file;

    file.open(MASTER_PATH + FILENAMES[index]);

    if(!file){

        cout << "!file ";

    }

    else{

        stringstream stringStream;

        stringStream << file.rdbuf();

        file.close();

        string contents = stringStream.str();

        if(!contents.empty() && contents[contents.length() - 1] == '\n'){

            contents.erase(contents.length() - 1);

        }

        int openBracket = contents.find('[');

        int closeBracket = contents.find(']');

        if(openBracket != string::npos && closeBracket != string::npos && openBracket < closeBracket){

            string strbetween = contents.substr(openBracket+1, closeBracket-openBracket-1);

            contents = strbetween;

        }

        cout << contents << " ";

        if(index == 0 && contents == "unknown")

            return(false);

        else

            return(true);

    }

}