int mons_natural_regen_rate(monsters *monster);

static int _monster_natural_regen_roll(monsters *monster)

int mons_natural_regen_rate(monsters *monster)

    const int regen_rate =
        std::max(div_rand_round(monster->hit_dice, divider), 1);

    return (std::max(div_rand_round(monster->hit_dice, divider), 1));
}

static inline bool _mons_natural_regen_roll(monsters *monster)
{
    const int regen_rate = mons_natural_regen_rate(monster);

        || _monster_natural_regen_roll(monster))

        || _mons_natural_regen_roll(monster))

        if (one_chance_in(5))

        if (one_chance_in(6))

        if (coinflip())

        if (one_chance_in(3))

        {   
            heal_monster( mon, (turns / 10), false );

        {
            // Set a lower ceiling of 0.1 on the regen rate.
            const int regen_rate =
                std::max(mons_natural_regen_rate(mon) * 2, 5);
            
            heal_monster( mon, div_rand_round(turns * regen_rate, 50),
                          false );