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francois |
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#include "gestionversion.h" |
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francois |
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#include "HypergraphLib_platform.h" |
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#include "HypergraphLib_Components.h" |
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#include "HypergraphLib_dfs.h" |
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#include "HypergraphLib_Graph.h" |
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#include "HypergraphLib_Node.h" |
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/** |
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* Find the strongly connected components of a graph |
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// http://en.wikipedia.org/wiki/Strongly_connected_component |
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STRONGLY-CONNECTED COMPONENTS (G) |
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1 call DFS(G) to compute finishing times f[u] for each vertex u |
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2 compute GT |
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3 call DFS(GT), but in the main loop of DFS, consider the vertices in order of decreasing f[u] |
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4 produce as output the vertices of each tree in the DFS forest formed in point 3 as a separate SCC. |
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*/ |
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namespace HypergraphLib { |
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void FindSCC(Graph * __G, std::set < std::set < Node * > > & __components) |
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{ |
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std::map < int, Node * > unvisitedNodes = __G->GetNodes(); |
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while (unvisitedNodes.size()) |
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{ |
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std::set < Node * > depthFirstSearchNodes; |
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dfs((unvisitedNodes.begin())->second, depthFirstSearchNodes); |
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__components.insert ( depthFirstSearchNodes ); |
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for ( std::set < Node * >::const_iterator it = depthFirstSearchNodes.begin(); |
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it != depthFirstSearchNodes.end(); |
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it++) |
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unvisitedNodes.erase((*it)->Id()); |
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} |
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francois |
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} |
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foucault |
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francois |
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} |
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