test/circulation_test.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 08 Mar 2013 01:13:54 +0100
changeset 1046 387483bf0a56
parent 877 141f9c0db4a3
parent 1007 7e368d9b67f7
child 1084 8b2d4e5d96e4
permissions -rw-r--r--
Adjust image sizes in the documentation (#411)
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2010
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #include <iostream>
    20 
    21 #include "test_tools.h"
    22 #include <lemon/list_graph.h>
    23 #include <lemon/circulation.h>
    24 #include <lemon/lgf_reader.h>
    25 #include <lemon/concepts/digraph.h>
    26 #include <lemon/concepts/maps.h>
    27 
    28 using namespace lemon;
    29 
    30 char test_lgf[] =
    31   "@nodes\n"
    32   "label\n"
    33   "0\n"
    34   "1\n"
    35   "2\n"
    36   "3\n"
    37   "4\n"
    38   "5\n"
    39   "@arcs\n"
    40   "     lcap  ucap\n"
    41   "0 1  2  10\n"
    42   "0 2  2  6\n"
    43   "1 3  4  7\n"
    44   "1 4  0  5\n"
    45   "2 4  1  3\n"
    46   "3 5  3  8\n"
    47   "4 5  3  7\n"
    48   "@attributes\n"
    49   "source 0\n"
    50   "sink   5\n";
    51 
    52 void checkCirculationCompile()
    53 {
    54   typedef int VType;
    55   typedef concepts::Digraph Digraph;
    56 
    57   typedef Digraph::Node Node;
    58   typedef Digraph::Arc Arc;
    59   typedef concepts::ReadMap<Arc,VType> CapMap;
    60   typedef concepts::ReadMap<Node,VType> SupplyMap;
    61   typedef concepts::ReadWriteMap<Arc,VType> FlowMap;
    62   typedef concepts::WriteMap<Node,bool> BarrierMap;
    63 
    64   typedef Elevator<Digraph, Digraph::Node> Elev;
    65   typedef LinkedElevator<Digraph, Digraph::Node> LinkedElev;
    66 
    67   Digraph g;
    68   Node n;
    69   Arc a;
    70   CapMap lcap, ucap;
    71   SupplyMap supply;
    72   FlowMap flow;
    73   BarrierMap bar;
    74   VType v;
    75   bool b;
    76   ignore_unused_variable_warning(v,b);
    77 
    78   typedef Circulation<Digraph, CapMap, CapMap, SupplyMap>
    79             ::SetFlowMap<FlowMap>
    80             ::SetElevator<Elev>
    81             ::SetStandardElevator<LinkedElev>
    82             ::Create CirculationType;
    83   CirculationType circ_test(g, lcap, ucap, supply);
    84   const CirculationType& const_circ_test = circ_test;
    85 
    86   circ_test
    87     .lowerMap(lcap)
    88     .upperMap(ucap)
    89     .supplyMap(supply)
    90     .flowMap(flow);
    91 
    92   const CirculationType::Elevator& elev = const_circ_test.elevator();
    93   circ_test.elevator(const_cast<CirculationType::Elevator&>(elev));
    94   CirculationType::Tolerance tol = const_circ_test.tolerance();
    95   circ_test.tolerance(tol);
    96 
    97   circ_test.init();
    98   circ_test.greedyInit();
    99   circ_test.start();
   100   circ_test.run();
   101 
   102   v = const_circ_test.flow(a);
   103   const FlowMap& fm = const_circ_test.flowMap();
   104   b = const_circ_test.barrier(n);
   105   const_circ_test.barrierMap(bar);
   106 
   107   ignore_unused_variable_warning(fm);
   108 }
   109 
   110 template <class G, class LM, class UM, class DM>
   111 void checkCirculation(const G& g, const LM& lm, const UM& um,
   112                       const DM& dm, bool find)
   113 {
   114   Circulation<G, LM, UM, DM> circ(g, lm, um, dm);
   115   bool ret = circ.run();
   116   if (find) {
   117     check(ret, "A feasible solution should have been found.");
   118     check(circ.checkFlow(), "The found flow is corrupt.");
   119     check(!circ.checkBarrier(), "A barrier should not have been found.");
   120   } else {
   121     check(!ret, "A feasible solution should not have been found.");
   122     check(circ.checkBarrier(), "The found barrier is corrupt.");
   123   }
   124 }
   125 
   126 int main (int, char*[])
   127 {
   128   typedef ListDigraph Digraph;
   129   DIGRAPH_TYPEDEFS(Digraph);
   130 
   131   Digraph g;
   132   IntArcMap lo(g), up(g);
   133   IntNodeMap delta(g, 0);
   134   Node s, t;
   135 
   136   std::istringstream input(test_lgf);
   137   DigraphReader<Digraph>(g,input).
   138     arcMap("lcap", lo).
   139     arcMap("ucap", up).
   140     node("source",s).
   141     node("sink",t).
   142     run();
   143 
   144   delta[s] = 7; delta[t] = -7;
   145   checkCirculation(g, lo, up, delta, true);
   146 
   147   delta[s] = 13; delta[t] = -13;
   148   checkCirculation(g, lo, up, delta, true);
   149 
   150   delta[s] = 6; delta[t] = -6;
   151   checkCirculation(g, lo, up, delta, false);
   152 
   153   delta[s] = 14; delta[t] = -14;
   154   checkCirculation(g, lo, up, delta, false);
   155 
   156   delta[s] = 7; delta[t] = -13;
   157   checkCirculation(g, lo, up, delta, true);
   158 
   159   delta[s] = 5; delta[t] = -15;
   160   checkCirculation(g, lo, up, delta, true);
   161 
   162   delta[s] = 10; delta[t] = -11;
   163   checkCirculation(g, lo, up, delta, true);
   164 
   165   delta[s] = 11; delta[t] = -10;
   166   checkCirculation(g, lo, up, delta, false);
   167 
   168   return 0;
   169 }