C++ utils

StringUtils.cpp

#include <string>
#include <vector>
#include <sstream>

using std::vector;
using std::string;
using std::stringstream;

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

vector<string>& split(const string &s, const string &delim, vector<string> &result) {
    if(s.empty()) return result;
    if(s.size() < delim.size() || delim.empty()) {
        result.push_back(s);
        return result;
    }
    size_t start_index = 0, find_index;
    while(true) {
        find_index = s.find(delim, start_index);
        if(find_index == string::npos) {
            result.push_back(s.substr(start_index, s.size() - start_index));
            break;
        } else {
            result.push_back(s.substr(start_index, find_index - start_index));
            start_index = find_index + delim.size();
            if(start_index == s.size()) {
                result.push_back("");
                break;
            }
            if(start_index > s.size())  break;
        }
    }
    return result;
}

template<typename T>
vector<string> split(const string &s, T &delim) {
    vector<string> result;
    split(s, delim, result);
    return result;
}

split(" ac c d", ' ') => ["ac", " ", "c", "d"]