Function decrement_counter

plugins/timestream.cpp:421–427

template <typename FT, typename T>
static void decrement_counter(T *obj, FT T::*field, int32_t timeskip) {
    if (obj->*field <= 0)
        return;
    // TODO: check for overflow/underflow
    int32_t cur_val = static_cast<int32_t>(obj->*field);
    obj->*field = static_cast<FT>(std::max(1, cur_val - timeskip));
}

static void adjust_unit_counters(df::unit * unit, int32_t timeskip) {
    auto * c1 = &unit->counters;