deba@1017: /* -*- mode: C++; indent-tabs-mode: nil; -*-
deba@1017:  *
deba@1017:  * This file is a part of LEMON, a generic C++ optimization library.
deba@1017:  *
deba@1017:  * Copyright (C) 2003-2010
deba@1017:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
deba@1017:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
deba@1017:  *
deba@1017:  * Permission to use, modify and distribute this software is granted
deba@1017:  * provided that this copyright notice appears in all copies. For
deba@1017:  * precise terms see the accompanying LICENSE file.
deba@1017:  *
deba@1017:  * This software is provided "AS IS" with no warranty of any kind,
deba@1017:  * express or implied, and with no claim as to its suitability for any
deba@1017:  * purpose.
deba@1017:  *
deba@1017:  */
deba@1017: 
deba@1017: #include <sstream>
deba@1017: 
deba@1017: #include <lemon/smart_graph.h>
deba@1017: #include <lemon/adaptors.h>
deba@1017: #include <lemon/concepts/graph.h>
deba@1017: #include <lemon/concepts/maps.h>
deba@1017: #include <lemon/lgf_reader.h>
deba@1017: #include <lemon/nagamochi_ibaraki.h>
deba@1017: 
deba@1017: #include "test_tools.h"
deba@1017: 
deba@1017: using namespace lemon;
deba@1017: using namespace std;
deba@1017: 
deba@1017: const std::string lgf =
deba@1017:   "@nodes\n"
deba@1017:   "label\n"
deba@1017:   "0\n"
deba@1017:   "1\n"
deba@1017:   "2\n"
deba@1017:   "3\n"
deba@1017:   "4\n"
deba@1017:   "5\n"
deba@1017:   "@edges\n"
deba@1017:   "     cap1 cap2 cap3\n"
deba@1017:   "0 1  1    1    1   \n"
deba@1017:   "0 2  2    2    4   \n"
deba@1017:   "1 2  4    4    4   \n"
deba@1017:   "3 4  1    1    1   \n"
deba@1017:   "3 5  2    2    4   \n"
deba@1017:   "4 5  4    4    4   \n"
deba@1017:   "2 3  1    6    6   \n";
deba@1017: 
deba@1017: void checkNagamochiIbarakiCompile()
deba@1017: {
deba@1017:   typedef int Value;
deba@1017:   typedef concepts::Graph Graph;
deba@1017: 
deba@1017:   typedef Graph::Node Node;
deba@1017:   typedef Graph::Edge Edge;
deba@1017:   typedef concepts::ReadMap<Edge, Value> CapMap;
deba@1017:   typedef concepts::WriteMap<Node, bool> CutMap;
deba@1017: 
deba@1017:   Graph g;
deba@1017:   Node n;
deba@1017:   CapMap cap;
deba@1017:   CutMap cut;
deba@1017:   Value v;
deba@1017:   bool b;
deba@1017: 
deba@1017:   NagamochiIbaraki<Graph, CapMap> ni_test(g, cap);
deba@1017:   const NagamochiIbaraki<Graph, CapMap>& const_ni_test = ni_test;
deba@1017: 
deba@1017:   ni_test.init();
deba@1017:   ni_test.start();
deba@1017:   b = ni_test.processNextPhase();
deba@1017:   ni_test.run();
deba@1017: 
deba@1017:   v = const_ni_test.minCutValue();
deba@1017:   v = const_ni_test.minCutMap(cut);
deba@1017: }
deba@1017: 
deba@1017: template <typename Graph, typename CapMap, typename CutMap>
deba@1017: typename CapMap::Value
deba@1017:   cutValue(const Graph& graph, const CapMap& cap, const CutMap& cut)
deba@1017: {
deba@1017:   typename CapMap::Value sum = 0;
deba@1017:   for (typename Graph::EdgeIt e(graph); e != INVALID; ++e) {
deba@1017:     if (cut[graph.u(e)] != cut[graph.v(e)]) {
deba@1017:       sum += cap[e];
deba@1017:     }
deba@1017:   }
deba@1017:   return sum;
deba@1017: }
deba@1017: 
deba@1017: int main() {
deba@1017:   SmartGraph graph;
deba@1017:   SmartGraph::EdgeMap<int> cap1(graph), cap2(graph), cap3(graph);
deba@1017:   SmartGraph::NodeMap<bool> cut(graph);
deba@1017: 
deba@1017:   istringstream input(lgf);
deba@1017:   graphReader(graph, input)
deba@1017:     .edgeMap("cap1", cap1)
deba@1017:     .edgeMap("cap2", cap2)
deba@1017:     .edgeMap("cap3", cap3)
deba@1017:     .run();
deba@1017: 
deba@1017:   {
deba@1017:     NagamochiIbaraki<SmartGraph> ni(graph, cap1);
deba@1017:     ni.run();
deba@1017:     ni.minCutMap(cut);
deba@1017: 
deba@1017:     check(ni.minCutValue() == 1, "Wrong cut value");
deba@1017:     check(ni.minCutValue() == cutValue(graph, cap1, cut), "Wrong cut value");
deba@1017:   }
deba@1017:   {
deba@1017:     NagamochiIbaraki<SmartGraph> ni(graph, cap2);
deba@1017:     ni.run();
deba@1017:     ni.minCutMap(cut);
deba@1017: 
deba@1017:     check(ni.minCutValue() == 3, "Wrong cut value");
deba@1017:     check(ni.minCutValue() == cutValue(graph, cap2, cut), "Wrong cut value");
deba@1017:   }
deba@1017:   {
deba@1017:     NagamochiIbaraki<SmartGraph> ni(graph, cap3);
deba@1017:     ni.run();
deba@1017:     ni.minCutMap(cut);
deba@1017: 
deba@1017:     check(ni.minCutValue() == 5, "Wrong cut value");
deba@1017:     check(ni.minCutValue() == cutValue(graph, cap3, cut), "Wrong cut value");
deba@1017:   }
deba@1017:   {
deba@1017:     NagamochiIbaraki<SmartGraph>::SetUnitCapacity::Create ni(graph);
deba@1017:     ni.run();
deba@1017:     ni.minCutMap(cut);
deba@1017: 
deba@1017:     ConstMap<SmartGraph::Edge, int> cap4(1);
deba@1017:     check(ni.minCutValue() == 1, "Wrong cut value");
deba@1017:     check(ni.minCutValue() == cutValue(graph, cap4, cut), "Wrong cut value");
deba@1017:   }
deba@1017: 
deba@1017:   return 0;
deba@1017: }