Function utf8Truncate

src/openrct2/core/String.cpp:667–681

    }

    std::string_view utf8Truncate(std::string_view v, size_t size)
    {
        auto trunc = v.substr(0, size);
        for (size_t i = 0; i < trunc.size();)
        {
            auto length = utf8GetCodePointSize(trunc.substr(i, trunc.size()));
            if (!length.has_value())
            {
                return trunc.substr(0, i);
            }
            i += length.value();
        }

        return trunc;
    }

    std::string_view utf8TruncateCodePoints(std::string_view v, size_t size)
    {