Avoid using signed integers for edge IDs

CHANGELOG.md

@@ -6,6 +6,7 @@
       - FIXED: Remove the last short annotation segment in `trimShortSegments` [#4946](https://github.com/Project-OSRM/osrm-backend/pull/4946)
       - FIXED: Properly calculate annotations for speeds, durations and distances when waypoints are used with mapmatching [#4949](https://github.com/Project-OSRM/osrm-backend/pull/4949)
       - FIXED: Don't apply unimplemented SH and PH conditions in OpeningHours and add inversed date ranges [#4992](https://github.com/Project-OSRM/osrm-backend/issues/4992)
+      - FIXED: integer overflow in `DynamicGraph::Renumber` [#5021](https://github.com/Project-OSRM/osrm-backend/pull/5021)
     - Profile:
       - CHANGED: Handle oneways in get_forward_backward_by_key [#4929](https://github.com/Project-OSRM/osrm-backend/pull/4929)
       - FIXED: Do not route against oneway road if there is a cycleway in the wrong direction; also review bike profile [#4943](https://github.com/Project-OSRM/osrm-backend/issues/4943)

include/util/dynamic_graph.hpp

@@ -2,6 +2,8 @@
 #define DYNAMICGRAPH_HPP
 
 #include "util/deallocating_vector.hpp"
+#include "util/exception.hpp"
+#include "util/exception_utils.hpp"
 #include "util/integer_range.hpp"
 #include "util/permutation.hpp"
 #include "util/typedefs.hpp"
@@ -411,7 +413,7 @@ template <typename EdgeDataT> class DynamicGraph
         util::inplacePermutation(node_array.begin(), node_array.end(), old_to_new_node);
 
         // Build up edge permutation
-        auto new_edge_index = 0;
+        EdgeID new_edge_index = 0;
         std::vector<EdgeID> old_to_new_edge(edge_list.size(), SPECIAL_EDGEID);
         for (auto node : util::irange<NodeID>(0, number_of_nodes))
         {
@@ -419,6 +421,11 @@ template <typename EdgeDataT> class DynamicGraph
             // move all filled edges
             for (auto edge : GetAdjacentEdgeRange(node))
             {
+                if (new_edge_index == std::numeric_limits<EdgeID>::max())
+                {
+                    throw util::exception("There are too many edges, OSRM only supports 2^32" +
+                                          SOURCE_REF);
+                }
                 edge_list[edge].target = old_to_new_node[edge_list[edge].target];
                 BOOST_ASSERT(edge_list[edge].target != SPECIAL_NODEID);
                 old_to_new_edge[edge] = new_edge_index++;