Function arc_head

plugins/renepay/mcf.c:410–416

Helper function. * Given an arc idx, return the node that this arc is pointing to in the residual network. */

/* Helper function.
 * Given an arc idx, return the node that this arc is pointing to in the residual network. */
static u32 arc_head(const struct linear_network *linear_network,
                    const struct arc arc)
{
	const struct arc dual = arc_dual(arc);
	assert(dual.idx < tal_count(linear_network->arc_tail_node));
	return linear_network->arc_tail_node[dual.idx];
}

/* Helper function.
 * Given node idx `node`, return the idx of the first arc whose tail is `node`.