Avoid using signed integers for edge IDs #5021
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TheMarex
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Apr 12, 2018
danpat
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Apr 12, 2018
| std::vector<EdgeID> old_to_new_edge(edge_list.size(), SPECIAL_EDGEID); | ||
| for (auto node : util::irange<NodeID>(0, number_of_nodes)) | ||
| { | ||
| auto new_first_edge = new_edge_index; | ||
| // move all filled edges | ||
| for (auto edge : GetAdjacentEdgeRange(node)) | ||
| { | ||
| if (new_edge_index == std::numeric_limits<EdgeID>::max()) |
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Can this check be done before we start the loop and fail earlier? We know the size of the edge_list, right? This renumbering shouldn't create more than there was previously....
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yes, the check only prevents overflow of number_of_valid_edges, but you are right old_to_new_edge may be corrupted for dummy edges if new_edge_index overflows below
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Issue
PR fixes an integer overflow if number of edges is greater than 2^31 and adds a check for an unsigned integer overflow.
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