Changeset - r694:dcba640438c7
« 693:e01957
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kpeter (Peter Kovacs)
kpeter@inf.elte.hu
Bug fixes in connectivity.h (#285) - Bug fix in tree(). - Rename simpleDigraph() to simpleGraph() (it works for both directed and undirected graphs). - Possibly faster implementation for parallelFree() and simpleGraph().
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1 file changed with 20 insertions and 22 deletions:
lemon/connectivity.h
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22
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lemon/connectivity.h
Show white space 6 line context
... ... 
@@ -1372,2 +1372,3 @@
1372 1372 
    typedef typename Graph::Arc Arc;
1373 
    if (NodeIt(graph) == INVALID) return true;
1373 1374 
    Dfs<Graph> dfs(graph);
... ... 
@@ -1547,13 +1548,12 @@
1547 1548 
  /// Returns true when there are not parallel edges in the graph.
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  template <typename Digraph>
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  bool parallelFree(const Digraph& digraph) {
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    typename Digraph::template NodeMap<bool> reached(digraph, false);
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    for (typename Digraph::NodeIt n(digraph); n != INVALID; ++n) {
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      for (typename Digraph::OutArcIt a(digraph, n); a != INVALID; ++a) {
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        if (reached[digraph.target(a)]) return false;
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        reached.set(digraph.target(a), true);
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  template <typename Graph>
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  bool parallelFree(const Graph& graph) {
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    typename Graph::template NodeMap<int> reached(graph, 0);
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    int cnt = 1;
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    for (typename Graph::NodeIt n(graph); n != INVALID; ++n) {
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      for (typename Graph::OutArcIt a(graph, n); a != INVALID; ++a) {
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        if (reached[graph.target(a)] == cnt) return false;
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        reached[graph.target(a)] = cnt;
1555 1557 
      }
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      for (typename Digraph::OutArcIt a(digraph, n); a != INVALID; ++a) {
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        reached.set(digraph.target(a), false);
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      }
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      ++cnt;
1559 1559 
    }
... ... 
@@ -1567,15 +1567,13 @@
1567 1567 
  /// the graph.
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  template <typename Digraph>
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  bool simpleDigraph(const Digraph& digraph) {
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    typename Digraph::template NodeMap<bool> reached(digraph, false);
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    for (typename Digraph::NodeIt n(digraph); n != INVALID; ++n) {
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      reached.set(n, true);
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      for (typename Digraph::OutArcIt a(digraph, n); a != INVALID; ++a) {
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        if (reached[digraph.target(a)]) return false;
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        reached.set(digraph.target(a), true);
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  template <typename Graph>
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  bool simpleGraph(const Graph& graph) {
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    typename Graph::template NodeMap<int> reached(graph, 0);
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    int cnt = 1;
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    for (typename Graph::NodeIt n(graph); n != INVALID; ++n) {
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      reached[n] = cnt;
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      for (typename Graph::OutArcIt a(graph, n); a != INVALID; ++a) {
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        if (reached[graph.target(a)] == cnt) return false;
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        reached[graph.target(a)] = cnt;
1576 1577 
      }
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      for (typename Digraph::OutArcIt a(digraph, n); a != INVALID; ++a) {
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        reached.set(digraph.target(a), false);
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      }
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      reached.set(n, false);
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      ++cnt;
1581 1579 
    }
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