File content as of revision 2:39c4a85dc2a4:

#include "SPS.h"

SPS::SPS(){

    currentString = "";
    currentErrString = "";
    headerString = "/>tag identifier_id group_id date time zzz | s1 source_id interpreter_id data_line_version encoding source_firmware_version interpreter_firmware_version | latitude longitude gpsFixFlag mag_time mag_nt mag_sq checksum<";
           
};

void SPS::UpdateCurrentString(string tag, string identifier_id, string group_id, string date, string time, string ZZZ,string s1, string source_id, string interpreter_id, string data_line_version, string encoding, string source_firmware_version, string interpreter_firmware_version, string latitude, string longitude, char gpsFixFlag, string mag_time, string mag_nt, string mag_sq){

    currentString = "";
    string checkSum = "";
    
    //create current string
    currentString.push_back(LINESTART);
    currentString.append(tag);
    currentString.push_back(SPACE);
    currentString.append(identifier_id);
    currentString.push_back(SPACE);
    currentString.append(group_id);
    currentString.push_back(SPACE);
    currentString.append(date);
    currentString.push_back(SPACE);
    currentString.append(time);
    currentString.push_back(SPACE); 
    currentString.append("ZZZ");
    currentString.push_back(SPACE);
    currentString.push_back(HEADEREND);
    currentString.push_back(SPACE);
    currentString.append(s1);
    currentString.push_back(SPACE);
    currentString.append(source_id);
    currentString.push_back(SPACE);
    currentString.append(interpreter_id);
    currentString.push_back(SPACE);
    currentString.append(data_line_version);
    currentString.push_back(SPACE);
    currentString.append(encoding);
    currentString.push_back(SPACE);
    currentString.append(source_firmware_version);
    currentString.push_back(SPACE);
    currentString.append(interpreter_firmware_version);
    currentString.push_back(SPACE);
    currentString.push_back(HEADEREND);
    currentString.push_back(SPACE);
    currentString.append(latitude);
    currentString.push_back(SPACE);
    currentString.append(longitude);
    currentString.push_back(SPACE);
    currentString.push_back(gpsFixFlag);
    currentString.push_back(SPACE);
    currentString.append(mag_time);
    currentString.push_back(SPACE);
    currentString.append(mag_nt);
    currentString.push_back(SPACE);
    currentString.append(mag_sq);
    
    //calculate checksum
    checkSum = this->checkSumCalc();
    
    //append rest of string
    currentString.push_back(SPACE);
    currentString.append(checkSum);
    currentString.push_back(LINESTOP);
 
};

string SPS::checkSumCalc(){
    
    return "XXXX";
};