Re: [PATCH 1/3] make index-pâck able to complete thin packs

> +static void fix_unresolved_deltas(int nr_unresolved)
> +{
> +	struct delta_entry **sorted_by_pos;
> +	int i, n = 0;
> +
> +	/*
> +	 * Since many unresolved deltas may well be themselves base objects
> +	 * for more unresolved deltas, we really want to include the
> +	 * smallest number of base objects that would cover as much delta
> +	 * as possible by picking the
> +	 * trunc deltas first, allowing for other deltas to resolve without
> +	 * additional base objects.  Since most base objects are to be found
> +	 * before deltas depending on them, a good heuristic is to start
> +	 * resolving deltas in the same order as their position in the pack.
> +	 */
> +	sorted_by_pos = xmalloc(nr_unresolved * sizeof(*sorted_by_pos));
>  	for (i = 0; i < nr_deltas; i++) {
> -		if (deltas[i].obj->real_type == OBJ_REF_DELTA ||
> -		    deltas[i].obj->real_type == OBJ_OFS_DELTA)
> -			die("pack has unresolved deltas");
> +		if (objects[deltas[i].obj_no].real_type != OBJ_REF_DELTA)
> +			continue;
> +		sorted_by_pos[n++] = &deltas[i];
>  	}
>
> +	qsort(sorted_by_pos, n, sizeof(*sorted_by_pos), delta_pos_compare);
> +
> +	for (i = 0; i < n; i++) {
> +		struct delta_entry *d = sorted_by_pos[i];
> +		void *data;
> +		unsigned long size;
> +		char type[10];
> +		enum object_type obj_type;
> +		int j, first, last;
> +
> +		if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
> +			continue;