Method filename_v3

src/path.cpp:817–845

}

BOOST_FILESYSTEM_DECL path path_algorithms::filename_v3(path const& p)
{
    const size_type size = p.m_pathname.size();
    size_type root_name_size = 0;
    size_type root_dir_pos = find_root_directory_start(p.m_pathname.c_str(), size, root_name_size);
    size_type filename_size, pos;
    if (root_dir_pos < size && detail::is_directory_separator(p.m_pathname[size - 1]) && is_root_separator(p.m_pathname, root_dir_pos, size - 1))
    {
        // Return root directory
        pos = root_dir_pos;
        filename_size = 1u;
    }
    else if (root_name_size == size)
    {
        // Return root name
        pos = 0u;
        filename_size = root_name_size;
    }
    else
    {
        filename_size = find_filename_size(p.m_pathname, root_name_size, size);
        pos = size - filename_size;
        if (filename_size == 0u && pos > root_name_size && detail::is_directory_separator(p.m_pathname[pos - 1]) && !is_root_separator(p.m_pathname, root_dir_pos, pos - 1))
            return detail::dot_path();
    }

    const value_type* ptr = p.m_pathname.c_str() + pos;
    return path(ptr, ptr + filename_size);
}

BOOST_FILESYSTEM_DECL path_algorithms::string_type::size_type path_algorithms::find_filename_v4_size(path const& p)
{