dfilesys_mode.cpp

    std::string mode_str;
    u32 mode_flags = static_cast<u32>(mode);

    // Calculate the correct open mode for the file.
    if ((mode_flags & static_cast<u32>(Mode::Read)) &&
        (mode_flags & static_cast<u32>(Mode::Write))) {
        if (mode_flags & static_cast<u32>(Mode::Append))
            mode_str = "a+";
        else
            mode_str = "r+";
    } else {
        if (mode_flags & static_cast<u32>(Mode::Read))
            mode_str = "r";
        else if (mode_flags & static_cast<u32>(Mode::Append))
            mode_str = "a";
        else if (mode_flags & static_cast<u32>(Mode::Write))
            mode_str = "w";
    }

    mode_str += "b";

    return mode_str;