Re: [PATCH v3] range-diff: add configurable memory limit for cost matrix

> -
> -       ALLOC_ARRAY(cost, st_mult(n, n));
> +       size_t cost_size = st_mult(n, n);
> +       size_t cost_bytes = st_mult(sizeof(int), cost_size);
> +       if (cost_bytes >= max_memory) {
> +               struct strbuf cost_str = STRBUF_INIT;
> +               struct strbuf max_str = STRBUF_INIT;
> +               strbuf_humanise_bytes(&cost_str, cost_bytes);
> +               strbuf_humanise_bytes(&max_str, max_memory);
> +               die(_("range-diff: unable to compute the range-diff, since it "
> +                     "exceeds the maximum memory for the cost matrix: %s "
> +                     "(%"PRIuMAX" bytes) needed, %s (%"PRIuMAX" bytes) available"),
> +                   cost_str.buf, (uintmax_t)cost_bytes, max_str.buf, (uintmax_t)max_memory);
> +       }
> +       ALLOC_ARRAY(cost, cost_size);
>         ALLOC_ARRAY(a2b, n);
>         ALLOC_ARRAY(b2a, n);
>