Changeset 2338:359f0b71919b in lemon-0.x for lemon/smart_graph.h
- Timestamp:
- 01/11/07 22:06:47 (17 years ago)
- Branch:
- default
- Phase:
- public
- Convert:
- svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@3130
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
lemon/smart_graph.h
r2261 r2338 367 367 368 368 369 /**************** Undirected List Graph ****************/ 370 371 typedef UGraphExtender<UndirGraphExtender<SmartGraphBase> > 372 ExtendedSmartUGraphBase; 369 class SmartUGraphBase { 370 371 protected: 372 373 struct NodeT { 374 int first_out; 375 }; 376 377 struct EdgeT { 378 int target; 379 int next_out; 380 }; 381 382 std::vector<NodeT> nodes; 383 std::vector<EdgeT> edges; 384 385 int first_free_edge; 386 387 public: 388 389 typedef SmartUGraphBase Graph; 390 391 class Node { 392 friend class SmartUGraphBase; 393 protected: 394 395 int id; 396 explicit Node(int pid) { id = pid;} 397 398 public: 399 Node() {} 400 Node (Invalid) { id = -1; } 401 bool operator==(const Node& node) const {return id == node.id;} 402 bool operator!=(const Node& node) const {return id != node.id;} 403 bool operator<(const Node& node) const {return id < node.id;} 404 }; 405 406 class UEdge { 407 friend class SmartUGraphBase; 408 protected: 409 410 int id; 411 explicit UEdge(int pid) { id = pid;} 412 413 public: 414 UEdge() {} 415 UEdge (Invalid) { id = -1; } 416 bool operator==(const UEdge& edge) const {return id == edge.id;} 417 bool operator!=(const UEdge& edge) const {return id != edge.id;} 418 bool operator<(const UEdge& edge) const {return id < edge.id;} 419 }; 420 421 class Edge { 422 friend class SmartUGraphBase; 423 protected: 424 425 int id; 426 explicit Edge(int pid) { id = pid;} 427 428 public: 429 operator UEdge() const { return UEdge(id / 2); } 430 431 Edge() {} 432 Edge (Invalid) { id = -1; } 433 bool operator==(const Edge& edge) const {return id == edge.id;} 434 bool operator!=(const Edge& edge) const {return id != edge.id;} 435 bool operator<(const Edge& edge) const {return id < edge.id;} 436 }; 437 438 439 440 SmartUGraphBase() 441 : nodes(), edges() {} 442 443 444 int maxNodeId() const { return nodes.size()-1; } 445 int maxUEdgeId() const { return edges.size() / 2 - 1; } 446 int maxEdgeId() const { return edges.size()-1; } 447 448 Node source(Edge e) const { return Node(edges[e.id ^ 1].target); } 449 Node target(Edge e) const { return Node(edges[e.id].target); } 450 451 Node source(UEdge e) const { return Node(edges[2 * e.id].target); } 452 Node target(UEdge e) const { return Node(edges[2 * e.id + 1].target); } 453 454 static bool direction(Edge e) { 455 return (e.id & 1) == 1; 456 } 457 458 static Edge direct(UEdge e, bool d) { 459 return Edge(e.id * 2 + (d ? 1 : 0)); 460 } 461 462 void first(Node& node) const { 463 node.id = nodes.size() - 1; 464 } 465 466 void next(Node& node) const { 467 --node.id; 468 } 469 470 void first(Edge& edge) const { 471 edge.id = edges.size() - 1; 472 } 473 474 void next(Edge& edge) const { 475 --edge.id; 476 } 477 478 void first(UEdge& edge) const { 479 edge.id = edges.size() / 2 - 1; 480 } 481 482 void next(UEdge& edge) const { 483 --edge.id; 484 } 485 486 void firstOut(Edge &edge, const Node& v) const { 487 edge.id = nodes[v.id].first_out; 488 } 489 void nextOut(Edge &edge) const { 490 edge.id = edges[edge.id].next_out; 491 } 492 493 void firstIn(Edge &edge, const Node& v) const { 494 edge.id = ((nodes[v.id].first_out) ^ 1); 495 if (e.id == -2) e.id = -1; 496 } 497 void nextIn(Edge &edge) const { 498 edge.id = ((edges[edge.id ^ 1].next_out) ^ 1); 499 if (e.id == -2) e.id = -1; 500 } 501 502 void firstInc(UEdge &edge, bool& d, const Node& v) const { 503 int de = nodes[v.id].first_out; 504 edge.id = de / 2; 505 d = ((de & 1) == 1); 506 } 507 void nextInc(UEdge &edge, bool& d) const { 508 int de = (edges[(edge.id * 2) | (d ? 1 : 0)].next_out); 509 edge.id = de / 2; 510 d = ((de & 1) == 1); 511 } 512 513 static int id(Node v) { return v.id; } 514 static int id(Edge e) { return e.id; } 515 static int id(UEdge e) { return e.id; } 516 517 static Node nodeFromId(int id) { return Node(id);} 518 static Edge edgeFromId(int id) { return Edge(id);} 519 static UEdge uEdgeFromId(int id) { return UEdge(id);} 520 521 Node addNode() { 522 int n = nodes.size(); 523 nodes.push_back(NodeT()); 524 nodes[n].first_out = -1; 525 526 return Node(n); 527 } 528 529 UEdge addEdge(Node u, Node v) { 530 int n = edges.size(); 531 edges.push_back(EdgeT()); 532 edges.push_back(EdgeT()); 533 534 edges[n].target = u.id; 535 edges[n | 1].target = v.id; 536 537 edges[n].next_out = nodes[v.id].first_out; 538 edges[n | 1].next_out = nodes[u.id].first_out; 539 540 nodes[v.id].first_out = n; 541 nodes[u.id].first_out = (n | 1); 542 543 return UEdge(n / 2); 544 } 545 546 void clear() { 547 edges.clear(); 548 nodes.clear(); 549 } 550 551 }; 552 553 typedef UGraphExtender<SmartUGraphBase> ExtendedSmartUGraphBase; 373 554 374 555 /// \ingroup graphs … … 408 589 409 590 typedef ExtendedSmartUGraphBase Parent; 591 typedef Parent::OutEdgeIt IncEdgeIt; 410 592 411 593 /// Constructor … … 444 626 protected: 445 627 628 void saveSnapshot(Snapshot &s) 629 { 630 s.g = this; 631 s.node_num = nodes.size(); 632 s.edge_num = edges.size(); 633 } 446 634 447 635 void restoreSnapshot(const Snapshot &s) 448 636 { 449 637 while(s.edge_num<edges.size()) { 450 UEdge edge = uEdgeFromId(edges.size()-1); 638 int n=edges.size()-1; 639 UEdge edge=uEdgeFromId(n/2); 451 640 Parent::getNotifier(UEdge()).erase(edge); 452 641 std::vector<Edge> dir; 453 dir.push_back( Parent::direct(edge, true));454 dir.push_back( Parent::direct(edge, false));642 dir.push_back(edgeFromId(n)); 643 dir.push_back(edgeFromId(n-1)); 455 644 Parent::getNotifier(Edge()).erase(dir); 456 nodes[edges .back().source].first_out=edges.back().next_out;457 nodes[edges .back().target].first_in=edges.back().next_in;645 nodes[edges[n].target].first_out=edges[n].next_out; 646 nodes[edges[n-1].target].first_out=edges[n-1].next_out; 458 647 edges.pop_back(); 648 edges.pop_back(); 459 649 } 460 650 while(s.node_num<nodes.size()) { 461 Node node = nodeFromId(nodes.size()-1); 651 int n=nodes.size()-1; 652 Node node = nodeFromId(n); 462 653 Parent::getNotifier(Node()).erase(node); 463 654 nodes.pop_back(); … … 500 691 ///This constructor immediately makes a snapshot of the graph. 501 692 ///\param _g The graph we make a snapshot of. 502 Snapshot(SmartUGraph &_g) :g(&_g) { 503 node_num=g->nodes.size(); 504 edge_num=g->edges.size(); 693 Snapshot(SmartUGraph &g) { 694 g.saveSnapshot(*this); 505 695 } 506 696 … … 512 702 ///call, the previous snapshot gets lost. 513 703 ///\param _g The graph we make the snapshot of. 514 void save(SmartUGraph & _g)704 void save(SmartUGraph &g) 515 705 { 516 g=&_g; 517 node_num=g->nodes.size(); 518 edge_num=g->edges.size(); 706 g.saveSnapshot(*this); 519 707 } 520 708 … … 528 716 void restore() 529 717 { 530 718 g->restoreSnapshot(*this); 531 719 } 532 720 };
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