How to determine last string value in a text - c++

Question

I'm given a text in std::string that i want to analyze using stringstream.
The text is a line from a csv file in the following format:
SPIN;5;WIN;10;STOPPOSITIONS;27;1;14
I must create a key value pair (in a map) with the key being a string value from the line (ex: "SPIN") and the value a vector populated with the next integer value from the line (ex: 5). (KVP: {"SPIN", {5}}).
The problem is that I dont know how to determine the last string value of the line (in this example "STOPPOSITIONS").
When i get the word "STOPPOSITIONS" at the next iteration the variable word is changed to "1" which is wrong because i should create the following kvp (KVP: {"STOPPOSITIONS", {27,1,14}}).
What should i fix in order to find the last string value of a line?
Here is the code I'm using:
std::map<std::string, std::vector<uint64_t>> CsvReader::readAllKvp()
{
if (!_ifs->is_open())
{
_ifs->open(_fileName);
}
std::map<std::string, std::vector<uint64_t>> result;
std::string line;
std::string word;
uint64_t val;
while(getline(*_ifs,line,'\n') >> std::ws)
{
/* do stuff with word */
std::istringstream ss(line);
while(getline(ss, word, ';') >> std::ws)
{
//no more strings found
if(word == "")
{
//read all integers at the end of the line and put them
//in the map at the last key added (in our case: STOPPOSITIONS)
while(ss >> val)
{
result[result.rbegin()->first].push_back(val);
}
break;
}
if (result.find(word) == result.end()) //word not found in map
{
std::vector<uint64_t> newV;
result.insert(
std::pair<std::string, std::vector<uint64_t>>(word, newV));
}
ss >> val;
result[word].push_back(val);
ss.ignore(std::numeric_limits<std::streamsize>::max(),';');
}
}
_ifs->close();
return result;
}

Answer 1

I made an example of my suggested method. It only read one line, but adding another outer loop and processing all the lines of the file is a simple task.
#include <iostream>
#include <sstream>
#include <fstream>
#include <map>
#include <vector>
using std::cout;
using std::endl;
std::map<std::string, std::vector<uint64_t>> readAllKvp()
{
std::string str = "SPIN;5;WIN;10;STOPPOSITIONS;27;1;14";
std::stringstream ss(str); // Emulating input from file
std::map<std::string, std::vector<uint64_t>> result;
std::string word;
std::string last_string;
uint64_t val;
while(getline(ss >> std::ws, word, ';') >> std::ws)
{
try {
val = std::stoi(word);
if(!last_string.empty())
result[last_string].push_back(val);
} catch (std::invalid_argument&) {
last_string = word;
}
}
return result;
}
int main() {
auto map = readAllKvp();
for (auto& m : map) {
cout << m.first << ": ";
for (auto v : m.second)
cout << v << ' ';
cout << endl;
}
}