akachronix / brisk Goto Github PK

string& insert(size_t index, const string& s)
{
    char* old_str = new char[m_size + 1];
    memcpy(old_str, m_string, m_size + 1);

    if (m_string != nullptr)
        delete[] m_string;
    
    m_string = new char[m_size + s.size() + 1];
    memcpy(m_string, s.data(), index + 1);
    memcpy(m_string + index, s.data(), s.size());
    memcpy(m_string + index + s.size(), old_str + index, m_size - index);

    m_size += s.size();
    m_string[m_size + 1] = '\0';

    delete[] old_str;
    return *this;
}