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/* -*- mode: C++; indent-tabs-mode: nil; -*-
*
* This file is a part of LEMON, a generic C++ optimization library.
*
* Copyright (C) 2003-2010
* 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 "test_tools.h"
#include <lemon/list_graph.h>
#include <lemon/circulation.h>
#include <lemon/lgf_reader.h>
#include <lemon/concepts/digraph.h>
#include <lemon/concepts/maps.h>
using namespace lemon;
char test_lgf[] =
"@nodes\n"
"label\n"
"0\n"
"1\n"
"2\n"
"3\n"
"4\n"
"5\n"
"@arcs\n"
" lcap ucap\n"
"0 1 2 10\n"
"0 2 2 6\n"
"1 3 4 7\n"
"1 4 0 5\n"
"2 4 1 3\n"
"3 5 3 8\n"
"4 5 3 7\n"
"@attributes\n"
"source 0\n"
"sink 5\n";
void checkCirculationCompile()
{
typedef int VType;
typedef concepts::Digraph Digraph;
typedef Digraph::Node Node;
typedef Digraph::Arc Arc;
typedef concepts::ReadMap<Arc,VType> CapMap;
typedef concepts::ReadMap<Node,VType> SupplyMap;
typedef concepts::ReadWriteMap<Arc,VType> FlowMap;
typedef concepts::WriteMap<Node,bool> BarrierMap;
typedef Elevator<Digraph, Digraph::Node> Elev;
typedef LinkedElevator<Digraph, Digraph::Node> LinkedElev;
Digraph g;
Node n;
Arc a;
CapMap lcap, ucap;
SupplyMap supply;
FlowMap flow;
BarrierMap bar;
VType v;
bool b;
typedef Circulation<Digraph, CapMap, CapMap, SupplyMap>
::SetFlowMap<FlowMap>
::SetElevator<Elev>
::SetStandardElevator<LinkedElev>
::Create CirculationType;
CirculationType circ_test(g, lcap, ucap, supply);
const CirculationType& const_circ_test = circ_test;
circ_test
.lowerMap(lcap)
.upperMap(ucap)
.supplyMap(supply)
.flowMap(flow);
const CirculationType::Elevator& elev = const_circ_test.elevator();
circ_test.elevator(const_cast<CirculationType::Elevator&>(elev));
CirculationType::Tolerance tol = const_circ_test.tolerance();
circ_test.tolerance(tol);
circ_test.init();
circ_test.greedyInit();
circ_test.start();
circ_test.run();
v = const_circ_test.flow(a);
const FlowMap& fm = const_circ_test.flowMap();
b = const_circ_test.barrier(n);
const_circ_test.barrierMap(bar);
ignore_unused_variable_warning(fm);
}
template <class G, class LM, class UM, class DM>
void checkCirculation(const G& g, const LM& lm, const UM& um,
const DM& dm, bool find)
{
Circulation<G, LM, UM, DM> circ(g, lm, um, dm);
bool ret = circ.run();
if (find) {
check(ret, "A feasible solution should have been found.");
check(circ.checkFlow(), "The found flow is corrupt.");
check(!circ.checkBarrier(), "A barrier should not have been found.");
} else {
check(!ret, "A feasible solution should not have been found.");
check(circ.checkBarrier(), "The found barrier is corrupt.");
}
}
int main (int, char*[])
{
typedef ListDigraph Digraph;
DIGRAPH_TYPEDEFS(Digraph);
Digraph g;
IntArcMap lo(g), up(g);
IntNodeMap delta(g, 0);
Node s, t;
std::istringstream input(test_lgf);
DigraphReader<Digraph>(g,input).
arcMap("lcap", lo).
arcMap("ucap", up).
node("source",s).
node("sink",t).
run();
delta[s] = 7; delta[t] = -7;
checkCirculation(g, lo, up, delta, true);
delta[s] = 13; delta[t] = -13;
checkCirculation(g, lo, up, delta, true);
delta[s] = 6; delta[t] = -6;
checkCirculation(g, lo, up, delta, false);
delta[s] = 14; delta[t] = -14;
checkCirculation(g, lo, up, delta, false);
delta[s] = 7; delta[t] = -13;
checkCirculation(g, lo, up, delta, true);
delta[s] = 5; delta[t] = -15;
checkCirculation(g, lo, up, delta, true);
delta[s] = 10; delta[t] = -11;
checkCirculation(g, lo, up, delta, true);
delta[s] = 11; delta[t] = -10;
checkCirculation(g, lo, up, delta, false);
return 0;
}
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