拆分字符竄函數

StrVec Split(const string &s, char c, bool inclue_empty_value) {
    return Split(s.c_str(), s.length(), c, include_empty_value);
}

StrVec Split(const char *s, size_t len, char c, bool include_empty_value) {
    StrVec vec;
    if (s == NULL) {
        return vec;
    }

    for (int last = -1, cur = 0; cur <= len; ++cur) {
        char cur_c = (cur < len) ? s[cur] : 0;
        if (cur == len || cur_c == c) {
            if (cur - last == 1 && include_empty_value) {
                vec.push_back(string(""));
            } else {
                vec.push_back(string((s + last + 1), (cur - last - 1)));
            }
            last = cur;
        }
    }
    return vec;
}