alpar@209: /* -*- mode: C++; indent-tabs-mode: nil; -*-
kpeter@170:  *
alpar@209:  * This file is a part of LEMON, a generic C++ optimization library.
kpeter@170:  *
kpeter@170:  * Copyright (C) 2003-2008
kpeter@170:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
kpeter@170:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
kpeter@170:  *
kpeter@170:  * Permission to use, modify and distribute this software is granted
kpeter@170:  * provided that this copyright notice appears in all copies. For
kpeter@170:  * precise terms see the accompanying LICENSE file.
kpeter@170:  *
kpeter@170:  * This software is provided "AS IS" with no warranty of any kind,
kpeter@170:  * express or implied, and with no claim as to its suitability for any
kpeter@170:  * purpose.
kpeter@170:  *
kpeter@170:  */
kpeter@170: 
kpeter@170: #include <lemon/concepts/digraph.h>
kpeter@170: #include <lemon/smart_graph.h>
kpeter@170: #include <lemon/list_graph.h>
deba@228: #include <lemon/lgf_reader.h>
kpeter@170: #include <lemon/dijkstra.h>
kpeter@170: #include <lemon/path.h>
kpeter@170: 
kpeter@171: #include "graph_test.h"
kpeter@170: #include "test_tools.h"
kpeter@170: 
kpeter@170: using namespace lemon;
kpeter@170: 
deba@228: char test_lgf[] =
deba@228:   "@nodes\n"
deba@228:   "label\n"
deba@228:   "0\n"
deba@228:   "1\n"
deba@228:   "2\n"
deba@228:   "3\n"
deba@228:   "4\n"
deba@228:   "@arcs\n"
deba@228:   "     label length\n"
deba@228:   "0 1  0     1\n"
deba@228:   "1 2  1     1\n"
deba@228:   "2 3  2     1\n"
deba@228:   "0 3  4     5\n"
deba@228:   "0 3  5     10\n"
deba@228:   "0 3  6     7\n"
deba@228:   "4 2  7     1\n"
deba@228:   "@attributes\n"
deba@228:   "source 0\n"
deba@228:   "target 3\n";
deba@228: 
alpar@209: void checkDijkstraCompile()
kpeter@170: {
kpeter@170:   typedef int VType;
kpeter@170:   typedef concepts::Digraph Digraph;
kpeter@170:   typedef concepts::ReadMap<Digraph::Arc,VType> LengthMap;
kpeter@170:   typedef Dijkstra<Digraph, LengthMap> DType;
alpar@209: 
kpeter@170:   Digraph G;
kpeter@170:   Digraph::Node n;
kpeter@170:   Digraph::Arc e;
kpeter@170:   VType l;
kpeter@170:   bool b;
kpeter@170:   DType::DistMap d(G);
kpeter@170:   DType::PredMap p(G);
kpeter@170:   LengthMap length;
kpeter@170: 
kpeter@170:   DType dijkstra_test(G,length);
kpeter@170: 
kpeter@170:   dijkstra_test.run(n);
kpeter@170: 
kpeter@170:   l  = dijkstra_test.dist(n);
kpeter@170:   e  = dijkstra_test.predArc(n);
kpeter@170:   n  = dijkstra_test.predNode(n);
kpeter@170:   d  = dijkstra_test.distMap();
kpeter@170:   p  = dijkstra_test.predMap();
kpeter@170:   b  = dijkstra_test.reached(n);
kpeter@170: 
kpeter@170:   Path<Digraph> pp = dijkstra_test.path(n);
kpeter@170: }
kpeter@170: 
alpar@209: void checkDijkstraFunctionCompile()
kpeter@170: {
kpeter@170:   typedef int VType;
kpeter@170:   typedef concepts::Digraph Digraph;
kpeter@170:   typedef Digraph::Arc Arc;
kpeter@170:   typedef Digraph::Node Node;
kpeter@170:   typedef concepts::ReadMap<Digraph::Arc,VType> LengthMap;
alpar@209: 
kpeter@170:   Digraph g;
kpeter@278:   bool b;
kpeter@278:   dijkstra(g,LengthMap()).run(Node());
kpeter@278:   b=dijkstra(g,LengthMap()).run(Node(),Node());
kpeter@170:   dijkstra(g,LengthMap())
kpeter@278:     .predMap(concepts::ReadWriteMap<Node,Arc>())
kpeter@278:     .distMap(concepts::ReadWriteMap<Node,VType>())
kpeter@278:     .processedMap(concepts::WriteMap<Node,bool>())
kpeter@170:     .run(Node());
kpeter@278:   b=dijkstra(g,LengthMap())
kpeter@278:     .predMap(concepts::ReadWriteMap<Node,Arc>())
kpeter@278:     .distMap(concepts::ReadWriteMap<Node,VType>())
kpeter@278:     .processedMap(concepts::WriteMap<Node,bool>())
kpeter@278:     .path(concepts::Path<Digraph>())
kpeter@278:     .dist(VType())
kpeter@278:     .run(Node(),Node());
kpeter@170: }
kpeter@170: 
kpeter@170: template <class Digraph>
alpar@209: void checkDijkstra() {
kpeter@170:   TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
kpeter@170:   typedef typename Digraph::template ArcMap<int> LengthMap;
kpeter@170: 
kpeter@170:   Digraph G;
kpeter@170:   Node s, t;
kpeter@170:   LengthMap length(G);
alpar@209: 
deba@228:   std::istringstream input(test_lgf);
deba@228:   digraphReader(input, G).
deba@228:     arcMap("length", length).
deba@228:     node("source", s).
deba@228:     node("target", t).
deba@228:     run();
alpar@209: 
alpar@209:   Dijkstra<Digraph, LengthMap>
alpar@209:         dijkstra_test(G, length);
kpeter@170:   dijkstra_test.run(s);
alpar@209: 
deba@228:   check(dijkstra_test.dist(t)==3,"Dijkstra found a wrong path.");
kpeter@170: 
kpeter@170:   Path<Digraph> p = dijkstra_test.path(t);
kpeter@278:   check(p.length()==3,"path() found a wrong path.");
kpeter@170:   check(checkPath(G, p),"path() found a wrong path.");
kpeter@170:   check(pathSource(G, p) == s,"path() found a wrong path.");
kpeter@170:   check(pathTarget(G, p) == t,"path() found a wrong path.");
alpar@209: 
kpeter@170:   for(ArcIt e(G); e!=INVALID; ++e) {
kpeter@170:     Node u=G.source(e);
kpeter@170:     Node v=G.target(e);
alpar@210:     check( !dijkstra_test.reached(u) ||
alpar@210:            (dijkstra_test.dist(v) - dijkstra_test.dist(u) <= length[e]),
kpeter@278:            "Wrong output. dist(target)-dist(source)-arc_length=" <<
alpar@210:            dijkstra_test.dist(v) - dijkstra_test.dist(u) - length[e]);
kpeter@170:   }
kpeter@170: 
deba@228:   for(NodeIt v(G); v!=INVALID; ++v) {
deba@228:     if (dijkstra_test.reached(v)) {
deba@228:       check(v==s || dijkstra_test.predArc(v)!=INVALID, "Wrong tree.");
deba@228:       if (dijkstra_test.predArc(v)!=INVALID ) {
deba@228:         Arc e=dijkstra_test.predArc(v);
deba@228:         Node u=G.source(e);
deba@228:         check(u==dijkstra_test.predNode(v),"Wrong tree.");
deba@228:         check(dijkstra_test.dist(v) - dijkstra_test.dist(u) == length[e],
deba@228:               "Wrong distance! Difference: " <<
deba@228:               std::abs(dijkstra_test.dist(v)-dijkstra_test.dist(u)-length[e]));
deba@228:       }
kpeter@170:     }
kpeter@170:   }
alpar@209: 
kpeter@170:   {
kpeter@170:     NullMap<Node,Arc> myPredMap;
kpeter@170:     dijkstra(G,length).predMap(myPredMap).run(s);
kpeter@170:   }
kpeter@170: }
kpeter@170: 
kpeter@170: int main() {
kpeter@170:   checkDijkstra<ListDigraph>();
kpeter@170:   checkDijkstra<SmartDigraph>();
kpeter@170:   return 0;
kpeter@170: }