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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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*
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* This file is a part of LEMON, a generic C++ optimization library.
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*
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* Copyright (C) 2003-2011
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* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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* (Egervary Research Group on Combinatorial Optimization, EGRES).
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*
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* Permission to use, modify and distribute this software is granted
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* provided that this copyright notice appears in all copies. For
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* precise terms see the accompanying LICENSE file.
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*
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* This software is provided "AS IS" with no warranty of any kind,
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* express or implied, and with no claim as to its suitability for any
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* purpose.
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*
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*/
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#include <lemon/concepts/digraph.h>
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#include <lemon/smart_graph.h>
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#include <lemon/list_graph.h>
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#include <lemon/lgf_reader.h>
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#include <lemon/bfs.h>
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#include <lemon/path.h>
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#include "graph_test.h"
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#include "test_tools.h"
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using namespace lemon;
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char test_lgf[] =
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"@nodes\n"
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"label\n"
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"0\n"
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"1\n"
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"2\n"
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"3\n"
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"4\n"
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"5\n"
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"@arcs\n"
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" label\n"
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"0 1 0\n"
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"1 2 1\n"
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"2 3 2\n"
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"3 4 3\n"
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"0 3 4\n"
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"0 3 5\n"
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"5 2 6\n"
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"@attributes\n"
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"source 0\n"
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"target 4\n";
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void checkBfsCompile()
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{
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typedef concepts::Digraph Digraph;
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typedef Bfs<Digraph> BType;
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typedef Digraph::Node Node;
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typedef Digraph::Arc Arc;
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Digraph G;
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Node s, t, n;
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Arc e;
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int l, i;
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ignore_unused_variable_warning(l,i);
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bool b;
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BType::DistMap d(G);
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BType::PredMap p(G);
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Path<Digraph> pp;
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concepts::ReadMap<Node,bool> nm;
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{
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BType bfs_test(G);
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const BType& const_bfs_test = bfs_test;
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bfs_test.run(s);
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bfs_test.run(s,t);
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bfs_test.run();
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bfs_test.init();
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bfs_test.addSource(s);
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n = bfs_test.processNextNode();
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n = bfs_test.processNextNode(t, b);
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n = bfs_test.processNextNode(nm, n);
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n = const_bfs_test.nextNode();
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b = const_bfs_test.emptyQueue();
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i = const_bfs_test.queueSize();
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bfs_test.start();
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bfs_test.start(t);
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bfs_test.start(nm);
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l = const_bfs_test.dist(t);
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e = const_bfs_test.predArc(t);
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s = const_bfs_test.predNode(t);
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b = const_bfs_test.reached(t);
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d = const_bfs_test.distMap();
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p = const_bfs_test.predMap();
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pp = const_bfs_test.path(t);
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}
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{
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BType
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::SetPredMap<concepts::ReadWriteMap<Node,Arc> >
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::SetDistMap<concepts::ReadWriteMap<Node,int> >
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::SetReachedMap<concepts::ReadWriteMap<Node,bool> >
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::SetStandardProcessedMap
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::SetProcessedMap<concepts::WriteMap<Node,bool> >
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::Create bfs_test(G);
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concepts::ReadWriteMap<Node,Arc> pred_map;
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concepts::ReadWriteMap<Node,int> dist_map;
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concepts::ReadWriteMap<Node,bool> reached_map;
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concepts::WriteMap<Node,bool> processed_map;
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bfs_test
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.predMap(pred_map)
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.distMap(dist_map)
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.reachedMap(reached_map)
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.processedMap(processed_map);
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bfs_test.run(s);
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bfs_test.run(s,t);
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bfs_test.run();
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bfs_test.init();
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bfs_test.addSource(s);
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n = bfs_test.processNextNode();
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n = bfs_test.processNextNode(t, b);
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n = bfs_test.processNextNode(nm, n);
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n = bfs_test.nextNode();
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b = bfs_test.emptyQueue();
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i = bfs_test.queueSize();
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bfs_test.start();
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bfs_test.start(t);
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bfs_test.start(nm);
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l = bfs_test.dist(t);
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e = bfs_test.predArc(t);
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s = bfs_test.predNode(t);
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b = bfs_test.reached(t);
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pp = bfs_test.path(t);
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}
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}
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void checkBfsFunctionCompile()
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{
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typedef int VType;
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typedef concepts::Digraph Digraph;
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typedef Digraph::Arc Arc;
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typedef Digraph::Node Node;
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Digraph g;
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bool b;
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ignore_unused_variable_warning(b);
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bfs(g).run(Node());
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b=bfs(g).run(Node(),Node());
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bfs(g).run();
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bfs(g)
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.predMap(concepts::ReadWriteMap<Node,Arc>())
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.distMap(concepts::ReadWriteMap<Node,VType>())
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.reachedMap(concepts::ReadWriteMap<Node,bool>())
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.processedMap(concepts::WriteMap<Node,bool>())
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.run(Node());
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b=bfs(g)
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.predMap(concepts::ReadWriteMap<Node,Arc>())
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.distMap(concepts::ReadWriteMap<Node,VType>())
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.reachedMap(concepts::ReadWriteMap<Node,bool>())
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.processedMap(concepts::WriteMap<Node,bool>())
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.path(concepts::Path<Digraph>())
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.dist(VType())
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.run(Node(),Node());
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bfs(g)
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.predMap(concepts::ReadWriteMap<Node,Arc>())
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.distMap(concepts::ReadWriteMap<Node,VType>())
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.reachedMap(concepts::ReadWriteMap<Node,bool>())
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.processedMap(concepts::WriteMap<Node,bool>())
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.run();
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}
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template <class Digraph>
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void checkBfs() {
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TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
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Digraph G;
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Node s, t;
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std::istringstream input(test_lgf);
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digraphReader(G, input).
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node("source", s).
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node("target", t).
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run();
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Bfs<Digraph> bfs_test(G);
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bfs_test.run(s);
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check(bfs_test.dist(t)==2,"Bfs found a wrong path.");
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Path<Digraph> p = bfs_test.path(t);
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check(p.length()==2,"path() found a wrong path.");
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check(checkPath(G, p),"path() found a wrong path.");
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check(pathSource(G, p) == s,"path() found a wrong path.");
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check(pathTarget(G, p) == t,"path() found a wrong path.");
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for(ArcIt a(G); a!=INVALID; ++a) {
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Node u=G.source(a);
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Node v=G.target(a);
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check( !bfs_test.reached(u) ||
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(bfs_test.dist(v) <= bfs_test.dist(u)+1),
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"Wrong output. " << G.id(u) << "->" << G.id(v));
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}
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for(NodeIt v(G); v!=INVALID; ++v) {
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if (bfs_test.reached(v)) {
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check(v==s || bfs_test.predArc(v)!=INVALID, "Wrong tree.");
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if (bfs_test.predArc(v)!=INVALID ) {
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Arc a=bfs_test.predArc(v);
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Node u=G.source(a);
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check(u==bfs_test.predNode(v),"Wrong tree.");
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check(bfs_test.dist(v) - bfs_test.dist(u) == 1,
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"Wrong distance. Difference: "
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<< std::abs(bfs_test.dist(v) - bfs_test.dist(u) - 1));
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}
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}
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}
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{
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NullMap<Node,Arc> myPredMap;
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bfs(G).predMap(myPredMap).run(s);
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}
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}
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int main()
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{
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checkBfs<ListDigraph>();
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checkBfs<SmartDigraph>();
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return 0;
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}
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