- /* (2) find the path to the root routing component */
- for (AsImpl *current = src_as; current != nullptr; current = static_cast<AsImpl*>(current->father())) {
- xbt_assert(index_src < ROUTING_HIERARCHY_MAXDEPTH, "ROUTING_HIERARCHY_MAXDEPTH should be increased for element %s", src->name());
- path_src[index_src++] = current;
- }
- for (AsImpl *current = dst_as; current != nullptr; current = static_cast<AsImpl*>(current->father())) {
- xbt_assert(index_dst < ROUTING_HIERARCHY_MAXDEPTH,"ROUTING_HIERARCHY_MAXDEPTH should be increased for path_dst");
- path_dst[index_dst++] = current;
- }
+ /** @brief Get the common ancestor and its first children in each line leading to src and dst */
+ static void find_common_ancestors(NetCard* src, NetCard* dst,
+ /* OUT */ AsImpl** common_ancestor, AsImpl** src_ancestor, AsImpl** dst_ancestor)
+ {
+#define ROUTING_HIERARCHY_MAXDEPTH 32 /* increase if it is not enough */
+ AsImpl* path_src[ROUTING_HIERARCHY_MAXDEPTH];
+ AsImpl* path_dst[ROUTING_HIERARCHY_MAXDEPTH];
+ int index_src = 0;
+ int index_dst = 0;
+ AsImpl* current_src;
+ AsImpl* current_dst;
+ AsImpl* father;
+
+ /* (1) find the path to root of src and dst*/
+ AsImpl* src_as = src->containingAS();
+ AsImpl* dst_as = dst->containingAS();
+
+ xbt_assert(src_as, "Host %s must be in an AS", src->name());
+ xbt_assert(dst_as, "Host %s must be in an AS", dst->name());
+
+ /* (2) find the path to the root routing component */
+ for (AsImpl* current = src_as; current != nullptr; current = static_cast<AsImpl*>(current->father())) {
+ xbt_assert(index_src < ROUTING_HIERARCHY_MAXDEPTH,
+ "ROUTING_HIERARCHY_MAXDEPTH should be increased for element %s", src->name());
+ path_src[index_src++] = current;
+ }
+ for (AsImpl* current = dst_as; current != nullptr; current = static_cast<AsImpl*>(current->father())) {
+ xbt_assert(index_dst < ROUTING_HIERARCHY_MAXDEPTH, "ROUTING_HIERARCHY_MAXDEPTH should be increased for path_dst");
+ path_dst[index_dst++] = current;
+ }