lemon-main: comparison lemon/smart

equal deleted inserted replaced

-:d10ebfb4fc71
+:2f000c45b3ab
-/* -*- C++ -*-
+/* -*- mode: C++; indent-tabs-mode: nil; -*-
 *
-* This file is a part of LEMON, a generic C++ optimization library
+* This file is a part of LEMON, a generic C++ optimization library.
 *
 * Copyright (C) 2003-2008
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 ///Base of SmartDigraph
 ///
 class SmartDigraphBase {
 protected:
 struct NodeT
 {
 int first_in, first_out;
 NodeT() {}
 };
 struct ArcT
 {
 int target, source, next_in, next_out;
 ArcT() {}
 };
 std::vector<NodeT> nodes;
 std::vector<ArcT> arcs;
 public:
 typedef SmartDigraphBase Graph;
 class Node;
 class Arc;
 public:
 SmartDigraphBase() : nodes(), arcs() { }
 SmartDigraphBase(const SmartDigraphBase &_g)
 : nodes(_g.nodes), arcs(_g.arcs) { }
 typedef True NodeNumTag;
 typedef True EdgeNumTag;
 int nodeNum() const { return nodes.size(); }
 int arcNum() const { return arcs.size(); }
 int maxNodeId() const { return nodes.size()-1; }
 int maxArcId() const { return arcs.size()-1; }
 Node addNode() {
 int n = nodes.size();
 nodes.push_back(NodeT());
 nodes[n].first_in = -1;
 nodes[n].first_out = -1;
 return Node(n);
 }
 Arc addArc(Node u, Node v) {
 int n = arcs.size();
 arcs.push_back(ArcT());
 arcs[n].source = u._id;
 arcs[n].target = v._id;
 arcs[n].next_out = nodes[u._id].first_out;
 arcs[n].next_in = nodes[v._id].first_in;
 nodes[u._id].first_out = nodes[v._id].first_in = n;
 static int id(Arc a) { return a._id; }
 static Node nodeFromId(int id) { return Node(id);}
 static Arc arcFromId(int id) { return Arc(id);}
 bool valid(Node n) const {
 return n._id >= 0 && n._id < static_cast<int>(nodes.size());
 }
 bool valid(Arc a) const {
 return a._id >= 0 && a._id < static_cast<int>(arcs.size());
 }
 class Node {
 friend class SmartDigraphBase;
 friend class SmartDigraph;
 Node (Invalid) : _id(-1) {}
 bool operator==(const Node i) const {return _id == i._id;}
 bool operator!=(const Node i) const {return _id != i._id;}
 bool operator<(const Node i) const {return _id < i._id;}
 };
 class Arc {
 friend class SmartDigraphBase;
 friend class SmartDigraph;
 }
 void firstIn(Arc& arc, const Node& node) const {
 arc._id = nodes[node._id].first_in;
 }
 void nextIn(Arc& arc) const {
 arc._id = arcs[arc._id].next_in;
 }
 };
 ///Assignment of SmartDigraph to another one is \e not allowed.
 ///Use DigraphCopy() instead.
 void operator=(const SmartDigraph &) {}
 public:
 /// Constructor
 /// Constructor.
 ///
 SmartDigraph() {};
 ///Add a new node to the digraph.
 /// \return the new node.
 ///
 Node addNode() { return Parent::addNode(); }
 ///Add a new arc to the digraph.
 ///Add a new arc to the digraph with source node \c s
 ///and target node \c t.
 ///\return the new arc.
 Arc addArc(const Node& s, const Node& t) {
 return Parent::addArc(s, t);
 }
 /// \brief Using this it is possible to avoid the superfluous memory
 /// allocation.
 void reserveArc(int m) { arcs.reserve(m); };
 /// \brief Node validity check
 ///
 /// This function gives back true if the given node is valid,
 /// ie. it is a real node of the graph.
 ///
 /// \warning A removed node (using Snapshot) could become valid again
 /// when new nodes are added to the graph.
 bool valid(Node n) const { return Parent::valid(n); }
 /// \brief Arc validity check
 ///
 /// This function gives back true if the given arc is valid,
 /// ie. it is a real arc of the graph.
 ///
 /// \warning A removed arc (using Snapshot) could become valid again
 /// when new arcs are added to the graph.
 bool valid(Arc a) const { return Parent::valid(a); }
 ///Clear the digraph.
 ///Erase all the nodes and arcs from the digraph.
 ///
 void clear() {
 Parent::clear();
 }
 ///Split a node.
 ///This function splits a node. First a new node is added to the digraph,
 ///then the source of each outgoing arc of \c n is moved to this new node.
 ///If \c connect is \c true (this is the default value), then a new arc
 ///from \c n to the newly created node is also added.
 ///\return The newly created node.
 if(connect) addArc(n,b);
 return b;
 }
 public:
 class Snapshot;
 protected:
 void restoreSnapshot(const Snapshot &s)
 {
 while(s.arc_num<arcs.size()) {
 Arc arc = arcFromId(arcs.size()-1);
-	Parent::notifier(Arc()).erase(arc);
+Parent::notifier(Arc()).erase(arc);
-	nodes[arcs.back().source].first_out=arcs.back().next_out;
+nodes[arcs.back().source].first_out=arcs.back().next_out;
-	nodes[arcs.back().target].first_in=arcs.back().next_in;
+nodes[arcs.back().target].first_in=arcs.back().next_in;
-	arcs.pop_back();
+arcs.pop_back();
 }
 while(s.node_num<nodes.size()) {
 Node node = nodeFromId(nodes.size()-1);
-	Parent::notifier(Node()).erase(node);
+Parent::notifier(Node()).erase(node);
-	nodes.pop_back();
+nodes.pop_back();
 }
 }
 public:
 ///Class to make a snapshot of the digraph and to restrore to it later.
 ///
 ///\warning If you do not use correctly the snapshot that can cause
 ///either broken program, invalid state of the digraph, valid but
 ///not the restored digraph or no change. Because the runtime performance
 ///the validity of the snapshot is not stored.
 class Snapshot
 {
 SmartDigraph *_graph;
 protected:
 friend class SmartDigraph;
 unsigned int node_num;
 unsigned int arc_num;
 public:
 ///Default constructor.
 ///Default constructor.
 ///To actually make a snapshot you must call save().
 ///
 Snapshot() : _graph(0) {}
 ///Constructor that immediately makes a snapshot
 ///This constructor immediately makes a snapshot of the digraph.
 ///\param _g The digraph we make a snapshot of.
 Snapshot(SmartDigraph &graph) : _graph(&graph) {
-	node_num=_graph->nodes.size();
+node_num=_graph->nodes.size();
-	arc_num=_graph->arcs.size();
+arc_num=_graph->arcs.size();
 }
 ///Make a snapshot.
 ///Make a snapshot of the digraph.
 ///
 ///This function can be called more than once. In case of a repeated
 ///call, the previous snapshot gets lost.
 ///\param _g The digraph we make the snapshot of.
 void save(SmartDigraph &graph)
 {
-	_graph=&graph;
+_graph=&graph;
-	node_num=_graph->nodes.size();
+node_num=_graph->nodes.size();
-	arc_num=_graph->arcs.size();
+arc_num=_graph->arcs.size();
 }
 ///Undo the changes until a snapshot.
 ///Undo the changes until a snapshot created by save().
 ///
 ///\note After you restored a state, you cannot restore
 ///a later state, in other word you cannot add again the arcs deleted
 ///by restore().
 void restore()
 {
-	_graph->restoreSnapshot(*this);
+_graph->restoreSnapshot(*this);
 }
 };
 };
 protected:
 struct NodeT {
 int first_out;
 };
 struct ArcT {
 int target;
 int next_out;
 };
 std::vector<NodeT> nodes;
 std::vector<ArcT> arcs;
 int first_free_arc;
 public:
 typedef SmartGraphBase Digraph;
 class Node;
 class Arc;
 class Edge;
 class Node {
 friend class SmartGraphBase;
 protected:
 int _id;
 SmartGraphBase()
 : nodes(), arcs() {}
 int maxNodeId() const { return nodes.size()-1; }
 int maxEdgeId() const { return arcs.size() / 2 - 1; }
 int maxArcId() const { return arcs.size()-1; }
 Node source(Arc e) const { return Node(arcs[e._id ^ 1].target); }
 Node target(Arc e) const { return Node(arcs[e._id].target); }
 static Arc direct(Edge e, bool d) {
 return Arc(e._id * 2 + (d ? 1 : 0));
 }
 void first(Node& node) const {
 node._id = nodes.size() - 1;
 }
 void next(Node& node) const {
 --node._id;
 }
 void first(Arc& arc) const {
 arc._id = arcs.size() - 1;
 }
 void next(Arc& arc) const {
 --arc._id;
 }
 void first(Edge& arc) const {
 arc._id = arcs.size() / 2 - 1;
 }
 void next(Edge& arc) const {
 --arc._id;
 if (de != -1) {
 arc._id = de / 2;
 d = ((de & 1) == 1);
 } else {
 arc._id = -1;
 d = true;
 }
 }
 static int id(Node v) { return v._id; }
 static int id(Arc e) { return e._id; }
 static int id(Edge e) { return e._id; }
 static Node nodeFromId(int id) { return Node(id);}
 static Arc arcFromId(int id) { return Arc(id);}
 static Edge edgeFromId(int id) { return Edge(id);}
 bool valid(Node n) const {
 return n._id >= 0 && n._id < static_cast<int>(nodes.size());
 }
 bool valid(Arc a) const {
 return a._id >= 0 && a._id < static_cast<int>(arcs.size());
 }
 bool valid(Edge e) const {
 return e._id >= 0 && 2 * e._id < static_cast<int>(arcs.size());
 }
 Node addNode() {
 int n = nodes.size();
 nodes.push_back(NodeT());
 nodes[n].first_out = -1;
 return Node(n);
 }
 Edge addEdge(Node u, Node v) {
 int n = arcs.size();
 arcs.push_back(ArcT());
 arcs.push_back(ArcT());
 arcs[n].target = u._id;
 arcs[n | 1].target = v._id;
 arcs[n].next_out = nodes[v._id].first_out;
 nodes[v._id].first_out = n;
 arcs[n | 1].next_out = nodes[u._id].first_out;
 nodes[u._id].first_out = (n | 1);
 return Edge(n / 2);
 }
 void clear() {
 arcs.clear();
 nodes.clear();
 }
 ///
 /// This is a simple and fast graph implementation.
 /// It is also quite memory efficient, but at the price
 /// that <b> it does support only limited (only stack-like)
 /// node and arc deletions</b>.
 /// Except from this it conforms to
 /// the \ref concepts::Graph "Graph concept".
 ///
 /// It also has an
 /// important extra feature that
 /// its maps are real \ref concepts::ReferenceMap "reference map"s.
 public:
 typedef ExtendedSmartGraphBase Parent;
 /// Constructor
 /// Constructor.
 ///
 SmartGraph() {}
 ///Add a new node to the graph.
 /// \return the new node.
 ///
 Node addNode() { return Parent::addNode(); }
 ///Add a new edge to the graph.
 ///Add a new edge to the graph with node \c s
 ///and \c t.
 ///\return the new edge.
 Edge addEdge(const Node& s, const Node& t) {
 return Parent::addEdge(s, t);
 }
 /// \brief Node validity check
 ///
 /// This function gives back true if the given node is valid,
 /// ie. it is a real node of the graph.
 ///
 /// \warning A removed node (using Snapshot) could become valid again
 /// when new nodes are added to the graph.
 bool valid(Node n) const { return Parent::valid(n); }
 /// \brief Arc validity check
 ///
 /// This function gives back true if the given arc is valid,
 /// ie. it is a real arc of the graph.
 ///
 /// \warning A removed arc (using Snapshot) could become valid again
 /// when new edges are added to the graph.
 bool valid(Arc a) const { return Parent::valid(a); }
 /// \brief Edge validity check
 ///
 /// This function gives back true if the given edge is valid,
 /// ie. it is a real edge of the graph.
 ///
 /// \warning A removed edge (using Snapshot) could become valid again
 /// when new edges are added to the graph.
 bool valid(Edge e) const { return Parent::valid(e); }
 ///Clear the graph.
 ///Erase all the nodes and edges from the graph.
 ///
 void clear() {
 Parent::clear();
 }
 public:
 class Snapshot;
 protected:
 void saveSnapshot(Snapshot &s)
 void restoreSnapshot(const Snapshot &s)
 {
 while(s.arc_num<arcs.size()) {
 int n=arcs.size()-1;
 Edge arc=edgeFromId(n/2);
-	Parent::notifier(Edge()).erase(arc);
+Parent::notifier(Edge()).erase(arc);
 std::vector<Arc> dir;
 dir.push_back(arcFromId(n));
 dir.push_back(arcFromId(n-1));
-	Parent::notifier(Arc()).erase(dir);
+Parent::notifier(Arc()).erase(dir);
-	nodes[arcs[n].target].first_out=arcs[n].next_out;
+nodes[arcs[n].target].first_out=arcs[n].next_out;
-	nodes[arcs[n-1].target].first_out=arcs[n-1].next_out;
+nodes[arcs[n-1].target].first_out=arcs[n-1].next_out;
-	arcs.pop_back();
+arcs.pop_back();
-	arcs.pop_back();
+arcs.pop_back();
 }
 while(s.node_num<nodes.size()) {
 int n=nodes.size()-1;
 Node node = nodeFromId(n);
-	Parent::notifier(Node()).erase(node);
+Parent::notifier(Node()).erase(node);
-	nodes.pop_back();
+nodes.pop_back();
 }
 }
 public:
 ///Class to make a snapshot of the digraph and to restrore to it later.
 ///
 ///\warning If you do not use correctly the snapshot that can cause
 ///either broken program, invalid state of the digraph, valid but
 ///not the restored digraph or no change. Because the runtime performance
 ///the validity of the snapshot is not stored.
 class Snapshot
 {
 SmartGraph *_graph;
 protected:
 friend class SmartGraph;
 unsigned int node_num;
 unsigned int arc_num;
 public:
 ///Default constructor.
 ///Default constructor.
 ///To actually make a snapshot you must call save().
 ///
 Snapshot() : _graph(0) {}
 ///Constructor that immediately makes a snapshot
 ///This constructor immediately makes a snapshot of the digraph.
 ///\param g The digraph we make a snapshot of.
 Snapshot(SmartGraph &graph) {
 graph.saveSnapshot(*this);
 }
 ///Make a snapshot of the graph.
 ///
 ///This function can be called more than once. In case of a repeated
 ///call, the previous snapshot gets lost.
 ///\param g The digraph we make the snapshot of.
 void save(SmartGraph &graph)
 {
 graph.saveSnapshot(*this);
 }
 ///Undo the changes until a snapshot.
 ///Undo the changes until a snapshot created by save().
 ///
 ///\note After you restored a state, you cannot restore
 ///a later state, in other word you cannot add again the arcs deleted
 ///by restore().
 {
 _graph->restoreSnapshot(*this);
 }
 };
 };
 } //namespace lemon
 #endif //LEMON_SMART_GRAPH_H

changeset 223	cfadfeef706f
parent 157	2ccc1afc2c52
child 220	a5d8c039f218