| 1 | #ifndef BFS_ITERATOR_HH |
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| 2 | #define BFS_ITERATOR_HH |
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| 3 | |
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| 4 | #include <queue> |
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| 5 | #include <stack> |
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| 6 | #include <utility> |
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| 7 | #include <graph_wrapper.h> |
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| 8 | |
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| 9 | namespace hugo { |
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| 10 | |
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| 11 | template <typename Graph> |
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| 12 | struct bfs { |
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| 13 | typedef typename Graph::NodeIt NodeIt; |
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| 14 | typedef typename Graph::EdgeIt EdgeIt; |
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| 15 | typedef typename Graph::EachNodeIt EachNodeIt; |
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| 16 | typedef typename Graph::OutEdgeIt OutEdgeIt; |
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| 17 | Graph& G; |
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| 18 | NodeIt s; |
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| 19 | typename Graph::NodeMap<bool> reached; |
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| 20 | typename Graph::NodeMap<EdgeIt> pred; |
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| 21 | typename Graph::NodeMap<int> dist; |
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| 22 | std::queue<NodeIt> bfs_queue; |
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| 23 | bfs(Graph& _G, NodeIt _s) : G(_G), s(_s), reached(_G), pred(_G), dist(_G) { |
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| 24 | bfs_queue.push(s); |
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| 25 | for(EachNodeIt i=G.template first<EachNodeIt>(); i.valid(); ++i) |
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| 26 | reached.set(i, false); |
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| 27 | reached.set(s, true); |
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| 28 | dist.set(s, 0); |
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| 29 | } |
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| 30 | |
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| 31 | void run() { |
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| 32 | while (!bfs_queue.empty()) { |
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| 33 | NodeIt v=bfs_queue.front(); |
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| 34 | OutEdgeIt e=G.template first<OutEdgeIt>(v); |
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| 35 | bfs_queue.pop(); |
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| 36 | for( ; e.valid(); ++e) { |
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| 37 | NodeIt w=G.bNode(e); |
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| 38 | std::cout << "scan node " << G.id(w) << " from node " << G.id(v) << std::endl; |
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| 39 | if (!reached.get(w)) { |
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| 40 | std::cout << G.id(w) << " is newly reached :-)" << std::endl; |
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| 41 | bfs_queue.push(w); |
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| 42 | dist.set(w, dist.get(v)+1); |
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| 43 | pred.set(w, e); |
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| 44 | reached.set(w, true); |
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| 45 | } else { |
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| 46 | std::cout << G.id(w) << " is already reached" << std::endl; |
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| 47 | } |
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| 48 | } |
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| 49 | } |
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| 50 | } |
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| 51 | }; |
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| 52 | |
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| 53 | template <typename Graph> |
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| 54 | struct bfs_visitor { |
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| 55 | typedef typename Graph::NodeIt NodeIt; |
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| 56 | typedef typename Graph::EdgeIt EdgeIt; |
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| 57 | typedef typename Graph::OutEdgeIt OutEdgeIt; |
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| 58 | Graph& G; |
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| 59 | bfs_visitor(Graph& _G) : G(_G) { } |
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| 60 | void at_previously_reached(OutEdgeIt& e) { |
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| 61 | //NodeIt v=G.aNode(e); |
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| 62 | NodeIt w=G.bNode(e); |
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| 63 | std::cout << G.id(w) << " is already reached" << std::endl; |
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| 64 | } |
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| 65 | void at_newly_reached(OutEdgeIt& e) { |
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| 66 | //NodeIt v=G.aNode(e); |
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| 67 | NodeIt w=G.bNode(e); |
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| 68 | std::cout << G.id(w) << " is newly reached :-)" << std::endl; |
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| 69 | } |
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| 70 | }; |
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| 71 | |
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| 72 | template <typename Graph, typename ReachedMap, typename visitor_type> |
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| 73 | struct bfs_iterator { |
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| 74 | typedef typename Graph::NodeIt NodeIt; |
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| 75 | typedef typename Graph::EdgeIt EdgeIt; |
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| 76 | typedef typename Graph::OutEdgeIt OutEdgeIt; |
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| 77 | Graph& G; |
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| 78 | std::queue<OutEdgeIt>& bfs_queue; |
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| 79 | ReachedMap& reached; |
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| 80 | visitor_type& visitor; |
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| 81 | void process() { |
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| 82 | while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 83 | if (bfs_queue.empty()) return; |
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| 84 | OutEdgeIt e=bfs_queue.front(); |
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| 85 | //NodeIt v=G.aNode(e); |
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| 86 | NodeIt w=G.bNode(e); |
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| 87 | if (!reached.get(w)) { |
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| 88 | visitor.at_newly_reached(e); |
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| 89 | bfs_queue.push(G.template first<OutEdgeIt>(w)); |
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| 90 | reached.set(w, true); |
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| 91 | } else { |
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| 92 | visitor.at_previously_reached(e); |
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| 93 | } |
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| 94 | } |
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| 95 | bfs_iterator(Graph& _G, std::queue<OutEdgeIt>& _bfs_queue, ReachedMap& _reached, visitor_type& _visitor) : G(_G), bfs_queue(_bfs_queue), reached(_reached), visitor(_visitor) { |
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| 96 | //while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 97 | valid(); |
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| 98 | } |
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| 99 | bfs_iterator<Graph, ReachedMap, visitor_type>& operator++() { |
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| 100 | //while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 101 | //if (bfs_queue.empty()) return *this; |
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| 102 | if (!valid()) return *this; |
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| 103 | ++(bfs_queue.front()); |
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| 104 | //while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 105 | valid(); |
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| 106 | return *this; |
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| 107 | } |
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| 108 | //void next() { |
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| 109 | // while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 110 | // if (bfs_queue.empty()) return; |
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| 111 | // ++(bfs_queue.front()); |
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| 112 | // while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 113 | //} |
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| 114 | bool valid() { |
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| 115 | while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 116 | if (bfs_queue.empty()) return false; else return true; |
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| 117 | } |
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| 118 | //bool finished() { |
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| 119 | // while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 120 | // if (bfs_queue.empty()) return true; else return false; |
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| 121 | //} |
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| 122 | operator EdgeIt () { return bfs_queue.front(); } |
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| 123 | |
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| 124 | }; |
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| 125 | |
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| 126 | template <typename Graph, typename ReachedMap> |
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| 127 | struct bfs_iterator1 { |
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| 128 | typedef typename Graph::NodeIt NodeIt; |
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| 129 | typedef typename Graph::EdgeIt EdgeIt; |
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| 130 | typedef typename Graph::OutEdgeIt OutEdgeIt; |
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| 131 | Graph& G; |
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| 132 | std::queue<OutEdgeIt>& bfs_queue; |
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| 133 | ReachedMap& reached; |
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| 134 | bool _newly_reached; |
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| 135 | bfs_iterator1(Graph& _G, std::queue<OutEdgeIt>& _bfs_queue, ReachedMap& _reached) : G(_G), bfs_queue(_bfs_queue), reached(_reached) { |
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| 136 | valid(); |
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| 137 | if (!bfs_queue.empty() && bfs_queue.front().valid()) { |
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| 138 | OutEdgeIt e=bfs_queue.front(); |
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| 139 | NodeIt w=G.bNode(e); |
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| 140 | if (!reached.get(w)) { |
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| 141 | bfs_queue.push(G.template first<OutEdgeIt>(w)); |
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| 142 | reached.set(w, true); |
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| 143 | _newly_reached=true; |
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| 144 | } else { |
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| 145 | _newly_reached=false; |
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| 146 | } |
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| 147 | } |
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| 148 | } |
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| 149 | bfs_iterator1<Graph, ReachedMap>& operator++() { |
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| 150 | if (!valid()) return *this; |
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| 151 | ++(bfs_queue.front()); |
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| 152 | valid(); |
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| 153 | if (!bfs_queue.empty() && bfs_queue.front().valid()) { |
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| 154 | OutEdgeIt e=bfs_queue.front(); |
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| 155 | NodeIt w=G.bNode(e); |
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| 156 | if (!reached.get(w)) { |
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| 157 | bfs_queue.push(G.template first<OutEdgeIt>(w)); |
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| 158 | reached.set(w, true); |
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| 159 | _newly_reached=true; |
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| 160 | } else { |
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| 161 | _newly_reached=false; |
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| 162 | } |
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| 163 | } |
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| 164 | return *this; |
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| 165 | } |
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| 166 | bool valid() { |
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| 167 | while ( !bfs_queue.empty() && !bfs_queue.front().valid() ) { bfs_queue.pop(); } |
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| 168 | if (bfs_queue.empty()) return false; else return true; |
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| 169 | } |
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| 170 | operator OutEdgeIt() { return bfs_queue.front(); } |
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| 171 | //ize |
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| 172 | bool newly_reached() { return _newly_reached; } |
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| 173 | |
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| 174 | }; |
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| 175 | |
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| 176 | template <typename Graph, typename OutEdgeIt, typename ReachedMap> |
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| 177 | struct BfsIterator { |
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| 178 | typedef typename Graph::NodeIt NodeIt; |
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| 179 | Graph& G; |
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| 180 | std::queue<OutEdgeIt>& bfs_queue; |
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| 181 | ReachedMap& reached; |
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| 182 | bool b_node_newly_reached; |
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| 183 | OutEdgeIt actual_edge; |
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| 184 | BfsIterator(Graph& _G, |
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| 185 | std::queue<OutEdgeIt>& _bfs_queue, |
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| 186 | ReachedMap& _reached) : |
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| 187 | G(_G), bfs_queue(_bfs_queue), reached(_reached) { |
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| 188 | actual_edge=bfs_queue.front(); |
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| 189 | if (actual_edge.valid()) { |
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| 190 | NodeIt w=G.bNode(actual_edge); |
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| 191 | if (!reached.get(w)) { |
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| 192 | bfs_queue.push(G.firstOutEdge(w)); |
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| 193 | reached.set(w, true); |
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| 194 | b_node_newly_reached=true; |
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| 195 | } else { |
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| 196 | b_node_newly_reached=false; |
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| 197 | } |
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| 198 | } |
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| 199 | } |
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| 200 | BfsIterator<Graph, OutEdgeIt, ReachedMap>& |
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| 201 | operator++() { |
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| 202 | if (bfs_queue.front().valid()) { |
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| 203 | ++(bfs_queue.front()); |
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| 204 | actual_edge=bfs_queue.front(); |
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| 205 | if (actual_edge.valid()) { |
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| 206 | NodeIt w=G.bNode(actual_edge); |
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| 207 | if (!reached.get(w)) { |
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| 208 | bfs_queue.push(G.firstOutEdge(w)); |
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| 209 | reached.set(w, true); |
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| 210 | b_node_newly_reached=true; |
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| 211 | } else { |
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| 212 | b_node_newly_reached=false; |
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| 213 | } |
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| 214 | } |
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| 215 | } else { |
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| 216 | bfs_queue.pop(); |
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| 217 | actual_edge=bfs_queue.front(); |
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| 218 | if (actual_edge.valid()) { |
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| 219 | NodeIt w=G.bNode(actual_edge); |
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| 220 | if (!reached.get(w)) { |
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| 221 | bfs_queue.push(G.firstOutEdge(w)); |
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| 222 | reached.set(w, true); |
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| 223 | b_node_newly_reached=true; |
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| 224 | } else { |
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| 225 | b_node_newly_reached=false; |
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| 226 | } |
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| 227 | } |
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| 228 | } |
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| 229 | return *this; |
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| 230 | } |
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| 231 | bool finished() { return bfs_queue.empty(); } |
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| 232 | operator OutEdgeIt () { return actual_edge; } |
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| 233 | bool bNodeIsNewlyReached() { return b_node_newly_reached; } |
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| 234 | bool aNodeIsExamined() { return !(actual_edge.valid()); } |
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| 235 | }; |
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| 236 | |
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| 237 | |
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| 238 | template <typename Graph, typename OutEdgeIt, typename ReachedMap> |
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| 239 | struct DfsIterator { |
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| 240 | typedef typename Graph::NodeIt NodeIt; |
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| 241 | Graph& G; |
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| 242 | std::stack<OutEdgeIt>& bfs_queue; |
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| 243 | ReachedMap& reached; |
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| 244 | bool b_node_newly_reached; |
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| 245 | OutEdgeIt actual_edge; |
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| 246 | DfsIterator(Graph& _G, |
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| 247 | std::stack<OutEdgeIt>& _bfs_queue, |
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| 248 | ReachedMap& _reached) : |
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| 249 | G(_G), bfs_queue(_bfs_queue), reached(_reached) { |
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| 250 | actual_edge=bfs_queue.top(); |
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| 251 | if (actual_edge.valid()) { |
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| 252 | NodeIt w=G.bNode(actual_edge); |
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| 253 | if (!reached.get(w)) { |
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| 254 | bfs_queue.push(G.firstOutEdge(w)); |
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| 255 | reached.set(w, true); |
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| 256 | b_node_newly_reached=true; |
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| 257 | } else { |
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| 258 | ++(bfs_queue.top()); |
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| 259 | b_node_newly_reached=false; |
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| 260 | } |
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| 261 | } else { |
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| 262 | bfs_queue.pop(); |
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| 263 | } |
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| 264 | } |
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| 265 | DfsIterator<Graph, OutEdgeIt, ReachedMap>& |
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| 266 | operator++() { |
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| 267 | actual_edge=bfs_queue.top(); |
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| 268 | if (actual_edge.valid()) { |
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| 269 | NodeIt w=G.bNode(actual_edge); |
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| 270 | if (!reached.get(w)) { |
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| 271 | bfs_queue.push(G.firstOutEdge(w)); |
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| 272 | reached.set(w, true); |
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| 273 | b_node_newly_reached=true; |
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| 274 | } else { |
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| 275 | ++(bfs_queue.top()); |
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| 276 | b_node_newly_reached=false; |
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| 277 | } |
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| 278 | } else { |
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| 279 | bfs_queue.pop(); |
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| 280 | } |
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| 281 | return *this; |
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| 282 | } |
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| 283 | bool finished() { return bfs_queue.empty(); } |
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| 284 | operator OutEdgeIt () { return actual_edge; } |
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| 285 | bool bNodeIsNewlyReached() { return b_node_newly_reached; } |
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| 286 | bool aNodeIsExamined() { return !(actual_edge.valid()); } |
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| 287 | }; |
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| 288 | |
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| 289 | template <typename Graph, typename OutEdgeIt, typename ReachedMap> |
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| 290 | struct BfsIterator1 { |
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| 291 | typedef typename Graph::NodeIt NodeIt; |
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| 292 | Graph& G; |
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| 293 | std::queue<OutEdgeIt>& bfs_queue; |
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| 294 | ReachedMap& reached; |
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| 295 | bool b_node_newly_reached; |
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| 296 | OutEdgeIt actual_edge; |
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| 297 | BfsIterator1(Graph& _G, |
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| 298 | std::queue<OutEdgeIt>& _bfs_queue, |
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| 299 | ReachedMap& _reached) : |
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| 300 | G(_G), bfs_queue(_bfs_queue), reached(_reached) { |
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| 301 | actual_edge=bfs_queue.front(); |
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| 302 | if (actual_edge.valid()) { |
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| 303 | NodeIt w=G.bNode(actual_edge); |
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| 304 | if (!reached.get(w)) { |
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| 305 | bfs_queue.push(OutEdgeIt(G, w)); |
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| 306 | reached.set(w, true); |
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| 307 | b_node_newly_reached=true; |
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| 308 | } else { |
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| 309 | b_node_newly_reached=false; |
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| 310 | } |
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| 311 | } |
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| 312 | } |
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| 313 | void next() { |
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| 314 | if (bfs_queue.front().valid()) { |
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| 315 | ++(bfs_queue.front()); |
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| 316 | actual_edge=bfs_queue.front(); |
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| 317 | if (actual_edge.valid()) { |
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| 318 | NodeIt w=G.bNode(actual_edge); |
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| 319 | if (!reached.get(w)) { |
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| 320 | bfs_queue.push(OutEdgeIt(G, w)); |
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| 321 | reached.set(w, true); |
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| 322 | b_node_newly_reached=true; |
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| 323 | } else { |
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| 324 | b_node_newly_reached=false; |
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| 325 | } |
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| 326 | } |
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| 327 | } else { |
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| 328 | bfs_queue.pop(); |
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| 329 | actual_edge=bfs_queue.front(); |
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| 330 | if (actual_edge.valid()) { |
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| 331 | NodeIt w=G.bNode(actual_edge); |
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| 332 | if (!reached.get(w)) { |
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| 333 | bfs_queue.push(OutEdgeIt(G, w)); |
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| 334 | reached.set(w, true); |
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| 335 | b_node_newly_reached=true; |
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| 336 | } else { |
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| 337 | b_node_newly_reached=false; |
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| 338 | } |
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| 339 | } |
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| 340 | } |
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| 341 | //return *this; |
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| 342 | } |
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| 343 | bool finished() { return bfs_queue.empty(); } |
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| 344 | operator OutEdgeIt () { return actual_edge; } |
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| 345 | bool bNodeIsNewlyReached() { return b_node_newly_reached; } |
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| 346 | bool aNodeIsExamined() { return !(actual_edge.valid()); } |
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| 347 | }; |
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| 348 | |
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| 349 | |
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| 350 | template <typename Graph, typename OutEdgeIt, typename ReachedMap> |
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| 351 | struct DfsIterator1 { |
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| 352 | typedef typename Graph::NodeIt NodeIt; |
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| 353 | Graph& G; |
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| 354 | std::stack<OutEdgeIt>& bfs_queue; |
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| 355 | ReachedMap& reached; |
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| 356 | bool b_node_newly_reached; |
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| 357 | OutEdgeIt actual_edge; |
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| 358 | DfsIterator1(Graph& _G, |
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| 359 | std::stack<OutEdgeIt>& _bfs_queue, |
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| 360 | ReachedMap& _reached) : |
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| 361 | G(_G), bfs_queue(_bfs_queue), reached(_reached) { |
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| 362 | //actual_edge=bfs_queue.top(); |
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| 363 | //if (actual_edge.valid()) { |
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| 364 | // NodeIt w=G.bNode(actual_edge); |
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| 365 | //if (!reached.get(w)) { |
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| 366 | // bfs_queue.push(OutEdgeIt(G, w)); |
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| 367 | // reached.set(w, true); |
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| 368 | // b_node_newly_reached=true; |
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| 369 | //} else { |
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| 370 | // ++(bfs_queue.top()); |
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| 371 | // b_node_newly_reached=false; |
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| 372 | //} |
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| 373 | //} else { |
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| 374 | // bfs_queue.pop(); |
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| 375 | //} |
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| 376 | } |
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| 377 | void next() { |
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| 378 | actual_edge=bfs_queue.top(); |
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| 379 | if (actual_edge.valid()) { |
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| 380 | NodeIt w=G.bNode(actual_edge); |
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| 381 | if (!reached.get(w)) { |
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| 382 | bfs_queue.push(OutEdgeIt(G, w)); |
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| 383 | reached.set(w, true); |
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| 384 | b_node_newly_reached=true; |
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| 385 | } else { |
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| 386 | ++(bfs_queue.top()); |
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| 387 | b_node_newly_reached=false; |
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| 388 | } |
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| 389 | } else { |
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| 390 | bfs_queue.pop(); |
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| 391 | } |
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| 392 | //return *this; |
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| 393 | } |
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| 394 | bool finished() { return bfs_queue.empty(); } |
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| 395 | operator OutEdgeIt () { return actual_edge; } |
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| 396 | bool bNodeIsNewlyReached() { return b_node_newly_reached; } |
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| 397 | bool aNodeIsLeaved() { return !(actual_edge.valid()); } |
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| 398 | }; |
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| 399 | |
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| 400 | template <typename Graph, typename OutEdgeIt, typename ReachedMap> |
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| 401 | class BfsIterator2 { |
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| 402 | typedef typename Graph::NodeIt NodeIt; |
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| 403 | const Graph& G; |
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| 404 | std::queue<OutEdgeIt> bfs_queue; |
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| 405 | ReachedMap reached; |
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| 406 | bool b_node_newly_reached; |
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| 407 | OutEdgeIt actual_edge; |
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| 408 | public: |
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| 409 | BfsIterator2(const Graph& _G) : G(_G), reached(G, false) { } |
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| 410 | void pushAndSetReached(NodeIt s) { |
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| 411 | reached.set(s, true); |
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| 412 | if (bfs_queue.empty()) { |
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| 413 | bfs_queue.push(G.template first<OutEdgeIt>(s)); |
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| 414 | actual_edge=bfs_queue.front(); |
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| 415 | if (actual_edge.valid()) { |
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| 416 | NodeIt w=G.bNode(actual_edge); |
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| 417 | if (!reached.get(w)) { |
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| 418 | bfs_queue.push(G.template first<OutEdgeIt>(w)); |
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| 419 | reached.set(w, true); |
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| 420 | b_node_newly_reached=true; |
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| 421 | } else { |
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| 422 | b_node_newly_reached=false; |
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| 423 | } |
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| 424 | } //else { |
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| 425 | //} |
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| 426 | } else { |
|---|
| 427 | bfs_queue.push(G.template first<OutEdgeIt>(s)); |
|---|
| 428 | } |
|---|
| 429 | } |
|---|
| 430 | BfsIterator2<Graph, OutEdgeIt, ReachedMap>& |
|---|
| 431 | operator++() { |
|---|
| 432 | if (bfs_queue.front().valid()) { |
|---|
| 433 | ++(bfs_queue.front()); |
|---|
| 434 | actual_edge=bfs_queue.front(); |
|---|
| 435 | if (actual_edge.valid()) { |
|---|
| 436 | NodeIt w=G.bNode(actual_edge); |
|---|
| 437 | if (!reached.get(w)) { |
|---|
| 438 | bfs_queue.push(G.template first<OutEdgeIt>(w)); |
|---|
| 439 | reached.set(w, true); |
|---|
| 440 | b_node_newly_reached=true; |
|---|
| 441 | } else { |
|---|
| 442 | b_node_newly_reached=false; |
|---|
| 443 | } |
|---|
| 444 | } |
|---|
| 445 | } else { |
|---|
| 446 | bfs_queue.pop(); |
|---|
| 447 | if (!bfs_queue.empty()) { |
|---|
| 448 | actual_edge=bfs_queue.front(); |
|---|
| 449 | if (actual_edge.valid()) { |
|---|
| 450 | NodeIt w=G.bNode(actual_edge); |
|---|
| 451 | if (!reached.get(w)) { |
|---|
| 452 | bfs_queue.push(G.template first<OutEdgeIt>(w)); |
|---|
| 453 | reached.set(w, true); |
|---|
| 454 | b_node_newly_reached=true; |
|---|
| 455 | } else { |
|---|
| 456 | b_node_newly_reached=false; |
|---|
| 457 | } |
|---|
| 458 | } |
|---|
| 459 | } |
|---|
| 460 | } |
|---|
| 461 | return *this; |
|---|
| 462 | } |
|---|
| 463 | bool finished() const { return bfs_queue.empty(); } |
|---|
| 464 | operator OutEdgeIt () const { return actual_edge; } |
|---|
| 465 | bool isBNodeNewlyReached() const { return b_node_newly_reached; } |
|---|
| 466 | bool isANodeExamined() const { return !(actual_edge.valid()); } |
|---|
| 467 | const ReachedMap& getReachedMap() const { return reached; } |
|---|
| 468 | const std::queue<OutEdgeIt>& getBfsQueue() const { return bfs_queue; } |
|---|
| 469 | }; |
|---|
| 470 | |
|---|
| 471 | |
|---|
| 472 | template <typename Graph, typename OutEdgeIt, typename ReachedMap> |
|---|
| 473 | class BfsIterator3 { |
|---|
| 474 | typedef typename Graph::NodeIt NodeIt; |
|---|
| 475 | const Graph& G; |
|---|
| 476 | std::queue< std::pair<NodeIt, OutEdgeIt> > bfs_queue; |
|---|
| 477 | ReachedMap reached; |
|---|
| 478 | bool b_node_newly_reached; |
|---|
| 479 | OutEdgeIt actual_edge; |
|---|
| 480 | public: |
|---|
| 481 | BfsIterator3(const Graph& _G) : G(_G), reached(G, false) { } |
|---|
| 482 | void pushAndSetReached(NodeIt s) { |
|---|
| 483 | reached.set(s, true); |
|---|
| 484 | if (bfs_queue.empty()) { |
|---|
| 485 | bfs_queue.push(std::pair<NodeIt, OutEdgeIt>(s, G.template first<OutEdgeIt>(s))); |
|---|
| 486 | actual_edge=bfs_queue.front().second; |
|---|
| 487 | if (actual_edge.valid()) { |
|---|
| 488 | NodeIt w=G.bNode(actual_edge); |
|---|
| 489 | if (!reached.get(w)) { |
|---|
| 490 | bfs_queue.push(std::pair<NodeIt, OutEdgeIt>(w, G.template first<OutEdgeIt>(w))); |
|---|
| 491 | reached.set(w, true); |
|---|
| 492 | b_node_newly_reached=true; |
|---|
| 493 | } else { |
|---|
| 494 | b_node_newly_reached=false; |
|---|
| 495 | } |
|---|
| 496 | } //else { |
|---|
| 497 | //} |
|---|
| 498 | } else { |
|---|
| 499 | bfs_queue.push(std::pair<NodeIt, OutEdgeIt>(s, G.template first<OutEdgeIt>(s))); |
|---|
| 500 | } |
|---|
| 501 | } |
|---|
| 502 | BfsIterator3<Graph, OutEdgeIt, ReachedMap>& |
|---|
| 503 | operator++() { |
|---|
| 504 | if (bfs_queue.front().second.valid()) { |
|---|
| 505 | ++(bfs_queue.front().second); |
|---|
| 506 | actual_edge=bfs_queue.front().second; |
|---|
| 507 | if (actual_edge.valid()) { |
|---|
| 508 | NodeIt w=G.bNode(actual_edge); |
|---|
| 509 | if (!reached.get(w)) { |
|---|
| 510 | bfs_queue.push(std::pair<NodeIt, OutEdgeIt>(w, G.template first<OutEdgeIt>(w))); |
|---|
| 511 | reached.set(w, true); |
|---|
| 512 | b_node_newly_reached=true; |
|---|
| 513 | } else { |
|---|
| 514 | b_node_newly_reached=false; |
|---|
| 515 | } |
|---|
| 516 | } |
|---|
| 517 | } else { |
|---|
| 518 | bfs_queue.pop(); |
|---|
| 519 | if (!bfs_queue.empty()) { |
|---|
| 520 | actual_edge=bfs_queue.front().second; |
|---|
| 521 | if (actual_edge.valid()) { |
|---|
| 522 | NodeIt w=G.bNode(actual_edge); |
|---|
| 523 | if (!reached.get(w)) { |
|---|
| 524 | bfs_queue.push(std::pair<NodeIt, OutEdgeIt>(w, G.template first<OutEdgeIt>(w))); |
|---|
| 525 | reached.set(w, true); |
|---|
| 526 | b_node_newly_reached=true; |
|---|
| 527 | } else { |
|---|
| 528 | b_node_newly_reached=false; |
|---|
| 529 | } |
|---|
| 530 | } |
|---|
| 531 | } |
|---|
| 532 | } |
|---|
| 533 | return *this; |
|---|
| 534 | } |
|---|
| 535 | bool finished() const { return bfs_queue.empty(); } |
|---|
| 536 | operator OutEdgeIt () const { return actual_edge; } |
|---|
| 537 | bool isBNodeNewlyReached() const { return b_node_newly_reached; } |
|---|
| 538 | bool isANodeExamined() const { return !(actual_edge.valid()); } |
|---|
| 539 | NodeIt aNode() const { return bfs_queue.front().first; } |
|---|
| 540 | NodeIt bNode() const { return G.bNode(actual_edge); } |
|---|
| 541 | const ReachedMap& getReachedMap() const { return reached; } |
|---|
| 542 | //const std::queue< std::pair<NodeIt, OutEdgeIt> >& getBfsQueue() const { return bfs_queue; } |
|---|
| 543 | }; |
|---|
| 544 | |
|---|
| 545 | |
|---|
| 546 | template <typename Graph, typename OutEdgeIt, |
|---|
| 547 | typename ReachedMap/*=typename Graph::NodeMap<bool>*/ > |
|---|
| 548 | class BfsIterator4 { |
|---|
| 549 | typedef typename Graph::NodeIt NodeIt; |
|---|
| 550 | const Graph& G; |
|---|
| 551 | std::queue<NodeIt> bfs_queue; |
|---|
| 552 | ReachedMap& reached; |
|---|
| 553 | bool b_node_newly_reached; |
|---|
| 554 | OutEdgeIt actual_edge; |
|---|
| 555 | bool own_reached_map; |
|---|
| 556 | public: |
|---|
| 557 | BfsIterator4(const Graph& _G, ReachedMap& _reached) : |
|---|
| 558 | G(_G), reached(_reached), |
|---|
| 559 | own_reached_map(false) { } |
|---|
| 560 | BfsIterator4(const Graph& _G) : |
|---|
| 561 | G(_G), reached(*(new ReachedMap(G /*, false*/))), |
|---|
| 562 | own_reached_map(true) { } |
|---|
| 563 | ~BfsIterator4() { if (own_reached_map) delete &reached; } |
|---|
| 564 | void pushAndSetReached(NodeIt s) { |
|---|
| 565 | //std::cout << "mimi" << &reached << std::endl; |
|---|
| 566 | reached.set(s, true); |
|---|
| 567 | //std::cout << "mumus" << std::endl; |
|---|
| 568 | if (bfs_queue.empty()) { |
|---|
| 569 | //std::cout << "bibi1" << std::endl; |
|---|
| 570 | bfs_queue.push(s); |
|---|
| 571 | //std::cout << "zizi" << std::endl; |
|---|
| 572 | G.getFirst(actual_edge, s); |
|---|
| 573 | //std::cout << "kiki" << std::endl; |
|---|
| 574 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 575 | NodeIt w=G.bNode(actual_edge); |
|---|
| 576 | if (!reached.get(w)) { |
|---|
| 577 | bfs_queue.push(w); |
|---|
| 578 | reached.set(w, true); |
|---|
| 579 | b_node_newly_reached=true; |
|---|
| 580 | } else { |
|---|
| 581 | b_node_newly_reached=false; |
|---|
| 582 | } |
|---|
| 583 | } |
|---|
| 584 | } else { |
|---|
| 585 | //std::cout << "bibi2" << std::endl; |
|---|
| 586 | bfs_queue.push(s); |
|---|
| 587 | } |
|---|
| 588 | } |
|---|
| 589 | BfsIterator4<Graph, OutEdgeIt, ReachedMap>& |
|---|
| 590 | operator++() { |
|---|
| 591 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 592 | /*++*/G.next(actual_edge); |
|---|
| 593 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 594 | NodeIt w=G.bNode(actual_edge); |
|---|
| 595 | if (!reached.get(w)) { |
|---|
| 596 | bfs_queue.push(w); |
|---|
| 597 | reached.set(w, true); |
|---|
| 598 | b_node_newly_reached=true; |
|---|
| 599 | } else { |
|---|
| 600 | b_node_newly_reached=false; |
|---|
| 601 | } |
|---|
| 602 | } |
|---|
| 603 | } else { |
|---|
| 604 | bfs_queue.pop(); |
|---|
| 605 | if (!bfs_queue.empty()) { |
|---|
| 606 | G.getFirst(actual_edge, bfs_queue.front()); |
|---|
| 607 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 608 | NodeIt w=G.bNode(actual_edge); |
|---|
| 609 | if (!reached.get(w)) { |
|---|
| 610 | bfs_queue.push(w); |
|---|
| 611 | reached.set(w, true); |
|---|
| 612 | b_node_newly_reached=true; |
|---|
| 613 | } else { |
|---|
| 614 | b_node_newly_reached=false; |
|---|
| 615 | } |
|---|
| 616 | } |
|---|
| 617 | } |
|---|
| 618 | } |
|---|
| 619 | return *this; |
|---|
| 620 | } |
|---|
| 621 | bool finished() const { return bfs_queue.empty(); } |
|---|
| 622 | operator OutEdgeIt () const { return actual_edge; } |
|---|
| 623 | bool isBNodeNewlyReached() const { return b_node_newly_reached; } |
|---|
| 624 | bool isANodeExamined() const { return !(G.valid(actual_edge)/*.valid()*/); } |
|---|
| 625 | NodeIt aNode() const { return bfs_queue.front(); } |
|---|
| 626 | NodeIt bNode() const { return G.bNode(actual_edge); } |
|---|
| 627 | const ReachedMap& getReachedMap() const { return reached; } |
|---|
| 628 | const std::queue<NodeIt>& getBfsQueue() const { return bfs_queue; } |
|---|
| 629 | }; |
|---|
| 630 | |
|---|
| 631 | |
|---|
| 632 | template <typename GraphWrapper, /*typename OutEdgeIt,*/ |
|---|
| 633 | typename ReachedMap/*=typename GraphWrapper::NodeMap<bool>*/ > |
|---|
| 634 | class BfsIterator5 { |
|---|
| 635 | typedef typename GraphWrapper::NodeIt NodeIt; |
|---|
| 636 | typedef typename GraphWrapper::OutEdgeIt OutEdgeIt; |
|---|
| 637 | GraphWrapper G; |
|---|
| 638 | std::queue<NodeIt> bfs_queue; |
|---|
| 639 | ReachedMap& reached; |
|---|
| 640 | bool b_node_newly_reached; |
|---|
| 641 | OutEdgeIt actual_edge; |
|---|
| 642 | bool own_reached_map; |
|---|
| 643 | public: |
|---|
| 644 | BfsIterator5(const GraphWrapper& _G, ReachedMap& _reached) : |
|---|
| 645 | G(_G), reached(_reached), |
|---|
| 646 | own_reached_map(false) { } |
|---|
| 647 | BfsIterator5(const GraphWrapper& _G) : |
|---|
| 648 | G(_G), reached(*(new ReachedMap(G /*, false*/))), |
|---|
| 649 | own_reached_map(true) { } |
|---|
| 650 | // BfsIterator5(const typename GraphWrapper::BaseGraph& _G, |
|---|
| 651 | // ReachedMap& _reached) : |
|---|
| 652 | // G(_G), reached(_reached), |
|---|
| 653 | // own_reached_map(false) { } |
|---|
| 654 | // BfsIterator5(const typename GraphWrapper::BaseGraph& _G) : |
|---|
| 655 | // G(_G), reached(*(new ReachedMap(G /*, false*/))), |
|---|
| 656 | // own_reached_map(true) { } |
|---|
| 657 | ~BfsIterator5() { if (own_reached_map) delete &reached; } |
|---|
| 658 | void pushAndSetReached(NodeIt s) { |
|---|
| 659 | reached.set(s, true); |
|---|
| 660 | if (bfs_queue.empty()) { |
|---|
| 661 | bfs_queue.push(s); |
|---|
| 662 | G.getFirst(actual_edge, s); |
|---|
| 663 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 664 | NodeIt w=G.bNode(actual_edge); |
|---|
| 665 | if (!reached.get(w)) { |
|---|
| 666 | bfs_queue.push(w); |
|---|
| 667 | reached.set(w, true); |
|---|
| 668 | b_node_newly_reached=true; |
|---|
| 669 | } else { |
|---|
| 670 | b_node_newly_reached=false; |
|---|
| 671 | } |
|---|
| 672 | } |
|---|
| 673 | } else { |
|---|
| 674 | bfs_queue.push(s); |
|---|
| 675 | } |
|---|
| 676 | } |
|---|
| 677 | BfsIterator5<GraphWrapper, /*OutEdgeIt,*/ ReachedMap>& |
|---|
| 678 | operator++() { |
|---|
| 679 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 680 | /*++*/G.next(actual_edge); |
|---|
| 681 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 682 | NodeIt w=G.bNode(actual_edge); |
|---|
| 683 | if (!reached.get(w)) { |
|---|
| 684 | bfs_queue.push(w); |
|---|
| 685 | reached.set(w, true); |
|---|
| 686 | b_node_newly_reached=true; |
|---|
| 687 | } else { |
|---|
| 688 | b_node_newly_reached=false; |
|---|
| 689 | } |
|---|
| 690 | } |
|---|
| 691 | } else { |
|---|
| 692 | bfs_queue.pop(); |
|---|
| 693 | if (!bfs_queue.empty()) { |
|---|
| 694 | G.getFirst(actual_edge, bfs_queue.front()); |
|---|
| 695 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 696 | NodeIt w=G.bNode(actual_edge); |
|---|
| 697 | if (!reached.get(w)) { |
|---|
| 698 | bfs_queue.push(w); |
|---|
| 699 | reached.set(w, true); |
|---|
| 700 | b_node_newly_reached=true; |
|---|
| 701 | } else { |
|---|
| 702 | b_node_newly_reached=false; |
|---|
| 703 | } |
|---|
| 704 | } |
|---|
| 705 | } |
|---|
| 706 | } |
|---|
| 707 | return *this; |
|---|
| 708 | } |
|---|
| 709 | bool finished() const { return bfs_queue.empty(); } |
|---|
| 710 | operator OutEdgeIt () const { return actual_edge; } |
|---|
| 711 | bool isBNodeNewlyReached() const { return b_node_newly_reached; } |
|---|
| 712 | bool isANodeExamined() const { return !(G.valid(actual_edge)/*.valid()*/); } |
|---|
| 713 | NodeIt aNode() const { return bfs_queue.front(); } |
|---|
| 714 | NodeIt bNode() const { return G.bNode(actual_edge); } |
|---|
| 715 | const ReachedMap& getReachedMap() const { return reached; } |
|---|
| 716 | const std::queue<NodeIt>& getBfsQueue() const { return bfs_queue; } |
|---|
| 717 | }; |
|---|
| 718 | |
|---|
| 719 | template <typename Graph, typename OutEdgeIt, |
|---|
| 720 | typename ReachedMap/*=typename Graph::NodeMap<bool>*/ > |
|---|
| 721 | class DfsIterator4 { |
|---|
| 722 | typedef typename Graph::NodeIt NodeIt; |
|---|
| 723 | const Graph& G; |
|---|
| 724 | std::stack<OutEdgeIt> dfs_stack; |
|---|
| 725 | bool b_node_newly_reached; |
|---|
| 726 | OutEdgeIt actual_edge; |
|---|
| 727 | NodeIt actual_node; |
|---|
| 728 | ReachedMap& reached; |
|---|
| 729 | bool own_reached_map; |
|---|
| 730 | public: |
|---|
| 731 | DfsIterator4(const Graph& _G, ReachedMap& _reached) : |
|---|
| 732 | G(_G), reached(_reached), |
|---|
| 733 | own_reached_map(false) { } |
|---|
| 734 | DfsIterator4(const Graph& _G) : |
|---|
| 735 | G(_G), reached(*(new ReachedMap(G /*, false*/))), |
|---|
| 736 | own_reached_map(true) { } |
|---|
| 737 | ~DfsIterator4() { if (own_reached_map) delete &reached; } |
|---|
| 738 | void pushAndSetReached(NodeIt s) { |
|---|
| 739 | actual_node=s; |
|---|
| 740 | reached.set(s, true); |
|---|
| 741 | dfs_stack.push(G.template first<OutEdgeIt>(s)); |
|---|
| 742 | } |
|---|
| 743 | DfsIterator4<Graph, OutEdgeIt, ReachedMap>& |
|---|
| 744 | operator++() { |
|---|
| 745 | actual_edge=dfs_stack.top(); |
|---|
| 746 | //actual_node=G.aNode(actual_edge); |
|---|
| 747 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 748 | NodeIt w=G.bNode(actual_edge); |
|---|
| 749 | actual_node=w; |
|---|
| 750 | if (!reached.get(w)) { |
|---|
| 751 | dfs_stack.push(G.template first<OutEdgeIt>(w)); |
|---|
| 752 | reached.set(w, true); |
|---|
| 753 | b_node_newly_reached=true; |
|---|
| 754 | } else { |
|---|
| 755 | actual_node=G.aNode(actual_edge); |
|---|
| 756 | /*++*/G.next(dfs_stack.top()); |
|---|
| 757 | b_node_newly_reached=false; |
|---|
| 758 | } |
|---|
| 759 | } else { |
|---|
| 760 | //actual_node=G.aNode(dfs_stack.top()); |
|---|
| 761 | dfs_stack.pop(); |
|---|
| 762 | } |
|---|
| 763 | return *this; |
|---|
| 764 | } |
|---|
| 765 | bool finished() const { return dfs_stack.empty(); } |
|---|
| 766 | operator OutEdgeIt () const { return actual_edge; } |
|---|
| 767 | bool isBNodeNewlyReached() const { return b_node_newly_reached; } |
|---|
| 768 | bool isANodeExamined() const { return !(G.valid(actual_edge)/*.valid()*/); } |
|---|
| 769 | NodeIt aNode() const { return actual_node; /*FIXME*/} |
|---|
| 770 | NodeIt bNode() const { return G.bNode(actual_edge); } |
|---|
| 771 | const ReachedMap& getReachedMap() const { return reached; } |
|---|
| 772 | const std::stack<OutEdgeIt>& getDfsStack() const { return dfs_stack; } |
|---|
| 773 | }; |
|---|
| 774 | |
|---|
| 775 | template <typename GraphWrapper, /*typename OutEdgeIt,*/ |
|---|
| 776 | typename ReachedMap/*=typename GraphWrapper::NodeMap<bool>*/ > |
|---|
| 777 | class DfsIterator5 { |
|---|
| 778 | typedef typename GraphWrapper::NodeIt NodeIt; |
|---|
| 779 | typedef typename GraphWrapper::OutEdgeIt OutEdgeIt; |
|---|
| 780 | GraphWrapper G; |
|---|
| 781 | std::stack<OutEdgeIt> dfs_stack; |
|---|
| 782 | bool b_node_newly_reached; |
|---|
| 783 | OutEdgeIt actual_edge; |
|---|
| 784 | NodeIt actual_node; |
|---|
| 785 | ReachedMap& reached; |
|---|
| 786 | bool own_reached_map; |
|---|
| 787 | public: |
|---|
| 788 | DfsIterator5(const GraphWrapper& _G, ReachedMap& _reached) : |
|---|
| 789 | G(_G), reached(_reached), |
|---|
| 790 | own_reached_map(false) { } |
|---|
| 791 | DfsIterator5(const GraphWrapper& _G) : |
|---|
| 792 | G(_G), reached(*(new ReachedMap(G /*, false*/))), |
|---|
| 793 | own_reached_map(true) { } |
|---|
| 794 | ~DfsIterator5() { if (own_reached_map) delete &reached; } |
|---|
| 795 | void pushAndSetReached(NodeIt s) { |
|---|
| 796 | actual_node=s; |
|---|
| 797 | reached.set(s, true); |
|---|
| 798 | dfs_stack.push(G.template first<OutEdgeIt>(s)); |
|---|
| 799 | } |
|---|
| 800 | DfsIterator5<GraphWrapper, /*OutEdgeIt,*/ ReachedMap>& |
|---|
| 801 | operator++() { |
|---|
| 802 | actual_edge=dfs_stack.top(); |
|---|
| 803 | //actual_node=G.aNode(actual_edge); |
|---|
| 804 | if (G.valid(actual_edge)/*.valid()*/) { |
|---|
| 805 | NodeIt w=G.bNode(actual_edge); |
|---|
| 806 | actual_node=w; |
|---|
| 807 | if (!reached.get(w)) { |
|---|
| 808 | dfs_stack.push(G.template first<OutEdgeIt>(w)); |
|---|
| 809 | reached.set(w, true); |
|---|
| 810 | b_node_newly_reached=true; |
|---|
| 811 | } else { |
|---|
| 812 | actual_node=G.aNode(actual_edge); |
|---|
| 813 | /*++*/G.next(dfs_stack.top()); |
|---|
| 814 | b_node_newly_reached=false; |
|---|
| 815 | } |
|---|
| 816 | } else { |
|---|
| 817 | //actual_node=G.aNode(dfs_stack.top()); |
|---|
| 818 | dfs_stack.pop(); |
|---|
| 819 | } |
|---|
| 820 | return *this; |
|---|
| 821 | } |
|---|
| 822 | bool finished() const { return dfs_stack.empty(); } |
|---|
| 823 | operator OutEdgeIt () const { return actual_edge; } |
|---|
| 824 | bool isBNodeNewlyReached() const { return b_node_newly_reached; } |
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| 825 | bool isANodeExamined() const { return !(G.valid(actual_edge)/*.valid()*/); } |
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| 826 | NodeIt aNode() const { return actual_node; /*FIXME*/} |
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| 827 | NodeIt bNode() const { return G.bNode(actual_edge); } |
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| 828 | const ReachedMap& getReachedMap() const { return reached; } |
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| 829 | const std::stack<OutEdgeIt>& getDfsStack() const { return dfs_stack; } |
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| 830 | }; |
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| 831 | |
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| 832 | |
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| 833 | |
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| 834 | } // namespace hugo |
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| 835 | |
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| 836 | #endif //BFS_ITERATOR_HH |
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