Function div_round_up

include/rabitqlib/utils/tools.hpp:36–38

}

constexpr size_t div_round_up(size_t val, size_t div) {
    return (val / div) + static_cast<size_t>((val % div) != 0);
}

constexpr size_t round_up_to_multiple(size_t val, size_t multiple_of) {
    return multiple_of * (div_round_up(val, multiple_of));