Function rnd_class

src/objnam.c:5402–5419

}

int
rnd_class(int first, int last)
{
    int i, x, sum = 0;

    if (last > first) {
        for (i = first; i <= last; i++)
            sum += objects[i].oc_prob;
        if (!sum) /* all zero, so equal probability */
            return rn1(last - first + 1, first);

        x = rnd(sum);
        for (i = first; i <= last; i++)
            if ((x -= objects[i].oc_prob) <= 0)
                return i;
    }
    return (first == last) ? first : STRANGE_OBJECT;
}

const char *
Japanese_item_name(int i, const char *ordinaryname)