RhodeCode

EXTRA_DIST += \

noinst_HEADERS += \

	test/graph_test.h \

        test/test_tools.h

check_PROGRAMS += \

	test/bfs_test \

        test/circulation_test \

        test/counter_test \

	test/dfs_test \

	test/digraph_test \

	test/dijkstra_test \

        test/dim_test \

	test/error_test \

	test/graph_adaptor_test \

	test/graph_copy_test \

	test/graph_test \

	test/graph_utils_test \

	test/heap_test \

	test/kruskal_test \

	test/hao_orlin_test \

        test/maps_test \

	test/max_matching_test \

        test/random_test \

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * 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).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include "test_tools.h"

#include <lemon/smart_graph.h>

#include <lemon/preflow.h>

#include <lemon/concepts/digraph.h>

#include <lemon/concepts/maps.h>

#include <lemon/lgf_reader.h>

#include <lemon/elevator.h>

using namespace lemon;

void checkPreflowCompile()

{

  typedef int VType;

  typedef concepts::Digraph Digraph;

  typedef Digraph::Node Node;

  typedef Digraph::Arc Arc;

  typedef concepts::ReadMap<Arc,VType> CapMap;

  typedef concepts::ReadWriteMap<Arc,VType> FlowMap;

  typedef concepts::WriteMap<Node,bool> CutMap;

  typedef Elevator<Digraph, Digraph::Node> Elev;

  typedef LinkedElevator<Digraph, Digraph::Node> LinkedElev;

  Digraph g;

  Node n;

  Arc e;

  CapMap cap;

  FlowMap flow;

  CutMap cut;

  Preflow<Digraph, CapMap>

    ::SetFlowMap<FlowMap>

    ::SetElevator<Elev>

    for (SmartDigraph::OutArcIt e(g, n); e != INVALID; ++e) {

      sum += flow[e];

    }

    for (SmartDigraph::InArcIt e(g, n); e != INVALID; ++e) {

      sum -= flow[e];

    }

    if (sum != 0) return false;

  }

  return true;

}

int main() {

  typedef SmartDigraph Digraph;

  typedef Digraph::Node Node;

  typedef Digraph::NodeIt NodeIt;

  typedef Digraph::ArcIt ArcIt;

  typedef Digraph::ArcMap<int> CapMap;

  typedef Digraph::ArcMap<int> FlowMap;

  typedef Digraph::NodeMap<bool> CutMap;

  typedef Preflow<Digraph, CapMap> PType;

  Digraph g;

  Node s, t;

  CapMap cap(g);

    arcMap("capacity", cap).

    node("source",s).

    node("target",t).

    run();

  PType preflow_test(g, cap, s, t);

  preflow_test.run();

  check(checkFlow(g, preflow_test.flowMap(), cap, s, t),

        "The flow is not feasible.");

  CutMap min_cut(g);

  preflow_test.minCutMap(min_cut);

  int min_cut_value=cutValue(g,min_cut,cap);

  check(preflow_test.flowValue() == min_cut_value,

        "The max flow value is not equal to the three min cut values.");

  FlowMap flow(g);

  for(ArcIt e(g); e!=INVALID; ++e) flow[e] = preflow_test.flowMap()[e];

  int flow_value=preflow_test.flowValue();

  for(ArcIt e(g); e!=INVALID; ++e) cap[e]=2*cap[e];

/* -*- C++ -*-

 *

 * 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).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include <iostream>

#include <lemon/list_graph.h>

#include <lemon/lgf_reader.h>

#include <lemon/path.h>

#include <lemon/suurballe.h>

#include "test_tools.h"

using namespace lemon;

// Check the feasibility of the flow

template <typename Digraph, typename FlowMap>

bool checkFlow( const Digraph& gr, const FlowMap& flow, 

                typename Digraph::Node s, typename Digraph::Node t,

                int value )

{

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  for (ArcIt e(gr); e != INVALID; ++e)

    if (!(flow[e] == 0 || flow[e] == 1)) return false;

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

    int sum = 0;

    for (OutArcIt e(gr, n); e != INVALID; ++e)

      sum += flow[e];

    for (InArcIt e(gr, n); e != INVALID; ++e)

      sum -= flow[e];

    if (n == s && sum != value) return false;

    if (n == t && sum != -value) return false;

    if (n != s && n != t && sum != 0) return false;

  }

  return true;

}

template <typename Digraph, typename Path>

bool checkPath( const Digraph& gr, const Path& path,

                typename Digraph::Node s, typename Digraph::Node t)

{

  // Check the "Complementary Slackness" optimality condition

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Node n = s;

  for (int i = 0; i < path.length(); ++i) {

    if (gr.source(path.nth(i)) != n) return false;

    n = gr.target(path.nth(i));

  }

  return n == t;

}

int main()

{

  DIGRAPH_TYPEDEFS(ListDigraph);

  // Read the test digraph

  ListDigraph digraph;

  ListDigraph::ArcMap<int> length(digraph);

  Node source, target;

  DigraphReader<ListDigraph>(digraph, input).

    arcMap("cost", length).

    node("source", source).

    node("target", target).

    run();

  // Find 2 paths

  {

    Suurballe<ListDigraph> suurballe(digraph, length, source, target);

    check(suurballe.run(2) == 2, "Wrong number of paths");

    check(checkFlow(digraph, suurballe.flowMap(), source, target, 2),

          "The flow is not feasible");

    check(suurballe.totalLength() == 510, "The flow is not optimal");

    check(checkOptimality(digraph, length, suurballe.flowMap(), 

                          suurballe.potentialMap()),

          "Wrong potentials");

    for (int i = 0; i < suurballe.pathNum(); ++i)

      check(checkPath(digraph, suurballe.path(i), source, target),

            "Wrong path");

  }

  // Find 3 paths

  {

    Suurballe<ListDigraph> suurballe(digraph, length, source, target);

    check(suurballe.run(3) == 3, "Wrong number of paths");

    check(checkFlow(digraph, suurballe.flowMap(), source, target, 3),

          "The flow is not feasible");

    check(suurballe.totalLength() == 1040, "The flow is not optimal");

    check(checkOptimality(digraph, length, suurballe.flowMap(),