RhodeCode

      return (arc._id & 1) == 1;

    }

    static Arc direct(Edge edge, bool dir) {

      return Arc((edge._id << 1) | (dir ? 1 : 0));

    }

    int dimension() const {

      return _dim;

    }

    bool projection(Node node, int n) const {

      return static_cast<bool>(node._id & (1 << n));

    }

    int dimension(Edge edge) const {

      return edge._id >> (_dim-1);

    }

    int dimension(Arc arc) const {

      return arc._id >> _dim;

    }

    int index(Node node) const {

      return node._id;

    }

    Node operator()(int ix) const {

      return Node(ix);

    }

  private:

    int _dim;

    int _node_num, _edge_num;

  };

  typedef GraphExtender<HypercubeGraphBase> ExtendedHypercubeGraphBase;

  /// \ingroup graphs

  ///

  /// \brief Hypercube graph class

  ///

  /// HypercubeGraph implements a special graph type. The nodes of the

  /// graph are indexed with integers having at most \c dim binary digits.

  /// Two nodes are connected in the graph if and only if their indices

  /// differ only on one position in the binary form.

  /// This class is completely static and it needs constant memory space.

  ///

  /// This type fully conforms to the \ref concepts::Graph "Graph concept".

  /// Most of its member functions and nested classes are documented

  /// only in the concept class.

  ///

  /// \note The type of the indices is chosen to \c int for efficiency

  /// reasons. Thus the maximum dimension of this implementation is 26

  /// (assuming that the size of \c int is 32 bit).

  class HypercubeGraph : public ExtendedHypercubeGraphBase {

    typedef ExtendedHypercubeGraphBase Parent;

  public:

    /// \brief Constructs a hypercube graph with \c dim dimensions.

    ///

    /// Constructs a hypercube graph with \c dim dimensions.

    HypercubeGraph(int dim) { construct(dim); }

    /// \brief The number of dimensions.

    ///

    /// Gives back the number of dimensions.

    int dimension() const {

      return Parent::dimension();

    }

    /// \brief Returns \c true if the n'th bit of the node is one.

    ///

    /// Returns \c true if the n'th bit of the node is one.

    bool projection(Node node, int n) const {

      return Parent::projection(node, n);

    }

    /// \brief The dimension id of an edge.

    ///

    /// Gives back the dimension id of the given edge.

    /// It is in the range <tt>[0..dim-1]</tt>.

    int dimension(Edge edge) const {

      return Parent::dimension(edge);

    }

    /// \brief The dimension id of an arc.

    ///

    /// Gives back the dimension id of the given arc.

    /// It is in the range <tt>[0..dim-1]</tt>.

    int dimension(Arc arc) const {

      return Parent::dimension(arc);

    }

    /// \brief The index of a node.

    ///

    /// Gives back the index of the given node.

    /// The lower bits of the integer describes the node.

    int index(Node node) const {

      return Parent::index(node);

    }

    /// \brief Gives back a node by its index.

    ///

    /// Gives back a node by its index.

    Node operator()(int ix) const {

      return Parent::operator()(ix);

    }

    /// \brief Number of nodes.

    int nodeNum() const { return Parent::nodeNum(); }

    /// \brief Number of edges.

  Node

    n1 = g.addNode(),

    n2 = g.addNode(),

    n3 = g.addNode();

  Arc

    e1 = g.addArc(n1, n2),

    e2 = g.addArc(n2, n3);

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

template <typename Digraph>

void checkDigraphValidityErase() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph g;

  Node

    n1 = g.addNode(),

    n2 = g.addNode(),

    n3 = g.addNode();

  Arc

    e1 = g.addArc(n1, n2),

    e2 = g.addArc(n2, n3);

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  g.erase(n1);

  check(!g.valid(n1), "Wrong validity check");

  check(g.valid(n2), "Wrong validity check");

  check(g.valid(n3), "Wrong validity check");

  check(!g.valid(e1), "Wrong validity check");

  check(g.valid(e2), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

void checkFullDigraph(int num) {

  typedef FullDigraph Digraph;

  DIGRAPH_TYPEDEFS(Digraph);

  Digraph G(num);

  checkGraphNodeList(G, num);

  checkGraphArcList(G, num * num);

  for (NodeIt n(G); n != INVALID; ++n) {

    checkGraphOutArcList(G, n, num);

    checkGraphInArcList(G, n, num);

  }

  checkGraphConArcList(G, num * num);

  checkNodeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  for (int i = 0; i < G.nodeNum(); ++i) {

    check(G.index(G(i)) == i, "Wrong index");

  }

  for (NodeIt s(G); s != INVALID; ++s) {

    for (NodeIt t(G); t != INVALID; ++t) {

      Arc a = G.arc(s, t);

      check(G.source(a) == s && G.target(a) == t, "Wrong arc lookup");

    }

  }

}

void checkDigraphs() {

  { // Checking ListDigraph

    checkDigraphBuild<ListDigraph>();

    checkDigraphSplit<ListDigraph>();

    checkDigraphAlter<ListDigraph>();

    checkDigraphErase<ListDigraph>();

    checkDigraphSnapshot<ListDigraph>();

    checkDigraphValidityErase<ListDigraph>();

  }

  { // Checking SmartDigraph

    checkDigraphBuild<SmartDigraph>();

    checkDigraphSplit<SmartDigraph>();

    checkDigraphSnapshot<SmartDigraph>();

    checkDigraphValidity<SmartDigraph>();

  }

  { // Checking FullDigraph

    checkFullDigraph(8);

  }

}

  typename Graph::Snapshot snapshot(G);

  Node n = G.addNode();

  G.addEdge(n3, n);

  G.addEdge(n, n3);

  G.addEdge(n3, n2);

  checkGraphNodeList(G, 4);

  checkGraphEdgeList(G, 6);

  checkGraphArcList(G, 12);

  snapshot.restore();

  checkGraphNodeList(G, 3);

  checkGraphEdgeList(G, 3);

  checkGraphArcList(G, 6);

  checkGraphIncEdgeArcLists(G, n1, 2);

  checkGraphIncEdgeArcLists(G, n2, 3);

  checkGraphIncEdgeArcLists(G, n3, 1);

  checkGraphConEdgeList(G, 3);

  checkGraphConArcList(G, 6);

  checkNodeIds(G);

  checkEdgeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphEdgeMap(G);

  checkGraphArcMap(G);

  G.addNode();

  snapshot.save(G);

  G.addEdge(G.addNode(), G.addNode());

  snapshot.restore();

  checkGraphNodeList(G, 4);

  checkGraphEdgeList(G, 3);

  checkGraphArcList(G, 6);

}

void checkFullGraph(int num) {

  typedef FullGraph Graph;

  GRAPH_TYPEDEFS(Graph);

  Graph G(num);

  checkGraphNodeList(G, num);

  checkGraphEdgeList(G, num * (num - 1) / 2);

  for (NodeIt n(G); n != INVALID; ++n) {

    checkGraphOutArcList(G, n, num - 1);

    checkGraphInArcList(G, n, num - 1);

    checkGraphIncEdgeList(G, n, num - 1);

  }

  checkGraphConArcList(G, num * (num - 1));

  checkGraphConEdgeList(G, num * (num - 1) / 2);

  checkArcDirections(G);

  checkNodeIds(G);

  checkArcIds(G);

  checkEdgeIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  checkGraphEdgeMap(G);

  for (int i = 0; i < G.nodeNum(); ++i) {

    check(G.index(G(i)) == i, "Wrong index");

  }

  for (NodeIt u(G); u != INVALID; ++u) {

    for (NodeIt v(G); v != INVALID; ++v) {

      Edge e = G.edge(u, v);

      Arc a = G.arc(u, v);

      if (u == v) {

        check(e == INVALID, "Wrong edge lookup");

        check(a == INVALID, "Wrong arc lookup");

      } else {

        check((G.u(e) == u && G.v(e) == v) ||

              (G.u(e) == v && G.v(e) == u), "Wrong edge lookup");

        check(G.source(a) == u && G.target(a) == v, "Wrong arc lookup");

      }

    }

  }

}

void checkConcepts() {

  { // Checking graph components

    checkConcept<BaseGraphComponent, BaseGraphComponent >();

    checkConcept<IDableGraphComponent<>,

      IDableGraphComponent<> >();

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  check(g.valid(g.direct(e1, true)), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.edgeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

template <typename Graph>

void checkGraphValidityErase() {

  TEMPLATE_GRAPH_TYPEDEFS(Graph);

  Graph g;

  Node

    n1 = g.addNode(),

    n2 = g.addNode(),

    n3 = g.addNode();

  Edge

    e1 = g.addEdge(n1, n2),

    e2 = g.addEdge(n2, n3);

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  check(g.valid(g.direct(e1, true)), "Wrong validity check");

  g.erase(n1);

  check(!g.valid(n1), "Wrong validity check");

  check(g.valid(n2), "Wrong validity check");

  check(g.valid(n3), "Wrong validity check");

  check(!g.valid(e1), "Wrong validity check");

  check(g.valid(e2), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.edgeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

void checkGridGraph(int width, int height) {

  typedef GridGraph Graph;

  GRAPH_TYPEDEFS(Graph);

  Graph G(width, height);

  check(G.width() == width, "Wrong column number");

  check(G.height() == height, "Wrong row number");

  for (int i = 0; i < width; ++i) {

    for (int j = 0; j < height; ++j) {

      check(G.col(G(i, j)) == i, "Wrong column");

      check(G.row(G(i, j)) == j, "Wrong row");

      check(G.pos(G(i, j)).x == i, "Wrong column");

      check(G.pos(G(i, j)).y == j, "Wrong row");

    }

  }

  for (int j = 0; j < height; ++j) {

    for (int i = 0; i < width - 1; ++i) {

      check(G.source(G.right(G(i, j))) == G(i, j), "Wrong right");

      check(G.target(G.right(G(i, j))) == G(i + 1, j), "Wrong right");

    }

    check(G.right(G(width - 1, j)) == INVALID, "Wrong right");

  }

  for (int j = 0; j < height; ++j) {

    for (int i = 1; i < width; ++i) {

      check(G.source(G.left(G(i, j))) == G(i, j), "Wrong left");

      check(G.target(G.left(G(i, j))) == G(i - 1, j), "Wrong left");

    }

    check(G.left(G(0, j)) == INVALID, "Wrong left");

  }

  for (int i = 0; i < width; ++i) {

    for (int j = 0; j < height - 1; ++j) {

      check(G.source(G.up(G(i, j))) == G(i, j), "Wrong up");

      check(G.target(G.up(G(i, j))) == G(i, j + 1), "Wrong up");

    }

    check(G.up(G(i, height - 1)) == INVALID, "Wrong up");

  }

  for (int i = 0; i < width; ++i) {

    for (int j = 1; j < height; ++j) {

      check(G.source(G.down(G(i, j))) == G(i, j), "Wrong down");

      check(G.target(G.down(G(i, j))) == G(i, j - 1), "Wrong down");

    }

    check(G.down(G(i, 0)) == INVALID, "Wrong down");

  }

  checkGraphNodeList(G, width * height);

  checkGraphEdgeList(G, width * (height - 1) + (width - 1) * height);

  checkGraphArcList(G, 2 * (width * (height - 1) + (width - 1) * height));

  for (NodeIt n(G); n != INVALID; ++n) {

    int nb = 4;

    if (G.col(n) == 0) --nb;

    if (G.col(n) == width - 1) --nb;

    if (G.row(n) == 0) --nb;

    if (G.row(n) == height - 1) --nb;

    checkGraphOutArcList(G, n, nb);

    checkGraphInArcList(G, n, nb);

    checkGraphIncEdgeList(G, n, nb);

  }

  checkArcDirections(G);

  checkGraphConArcList(G, 2 * (width * (height - 1) + (width - 1) * height));

  checkGraphConEdgeList(G, width * (height - 1) + (width - 1) * height);

  checkNodeIds(G);

  checkArcIds(G);

  checkEdgeIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  checkGraphEdgeMap(G);

}

void checkHypercubeGraph(int dim) {

  GRAPH_TYPEDEFS(HypercubeGraph);

  HypercubeGraph G(dim);

  checkGraphNodeList(G, 1 << dim);

  checkGraphEdgeList(G, dim * (1 << (dim-1)));

  checkGraphArcList(G, dim * (1 << dim));

  Node n = G.nodeFromId(dim);

  for (NodeIt n(G); n != INVALID; ++n) {

    checkGraphIncEdgeList(G, n, dim);

    for (IncEdgeIt e(G, n); e != INVALID; ++e) {

      check( (G.u(e) == n &&

              G.id(G.v(e)) == (G.id(n) ^ (1 << G.dimension(e)))) ||

             (G.v(e) == n &&

              G.id(G.u(e)) == (G.id(n) ^ (1 << G.dimension(e)))),

             "Wrong edge or wrong dimension");

    }

    checkGraphOutArcList(G, n, dim);

    for (OutArcIt a(G, n); a != INVALID; ++a) {

      check(G.source(a) == n &&

            G.id(G.target(a)) == (G.id(n) ^ (1 << G.dimension(a))),

            "Wrong arc or wrong dimension");

    }

    checkGraphInArcList(G, n, dim);

    for (InArcIt a(G, n); a != INVALID; ++a) {

      check(G.target(a) == n &&

            G.id(G.source(a)) == (G.id(n) ^ (1 << G.dimension(a))),

            "Wrong arc or wrong dimension");

    }

  }

  checkGraphConArcList(G, (1 << dim) * dim);

  checkGraphConEdgeList(G, dim * (1 << (dim-1)));

  checkArcDirections(G);

  checkNodeIds(G);

  checkArcIds(G);

  checkEdgeIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  checkGraphEdgeMap(G);

}

void checkGraphs() {

  { // Checking ListGraph

    checkGraphBuild<ListGraph>();

    checkGraphAlter<ListGraph>();