/* -*- 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 <lemon/concepts/digraph.h>

 #include <lemon/smart_graph.h>

 #include <lemon/list_graph.h>

 #include <lemon/lgf_reader.h>

 #include <lemon/dfs.h>

 #include <lemon/path.h>

 #include "graph_test.h"

 #include "test_tools.h"

 using namespace lemon;

 char test_lgf[] =

   "@nodes\n"

   "label\n"

   "0\n"

   "1\n"

   "2\n"

   "3\n"

   "4\n"

   "5\n"

   "6\n"

   "@arcs\n"

   "     label\n"

   "0 1  0\n"

   "1 2  1\n"

   "2 3  2\n"

   "1 4  3\n"

   "4 2  4\n"

   "4 5  5\n"

   "5 0  6\n"

   "6 3  7\n"

   "@attributes\n"

   "source 0\n"

   "target 5\n"

   "source1 6\n"

   "target1 3\n";

 void checkDfsCompile()

 {

   typedef concepts::Digraph Digraph;

   typedef Dfs<Digraph> DType;

   typedef Digraph::Node Node;

   typedef Digraph::Arc Arc;

   Digraph G;

   Node s, t;

   Arc e;

   int l, i;

   bool b;

   ::lemon::ignore_unused_variable_warning(l,i,b);

   DType::DistMap d(G);

   DType::PredMap p(G);

   Path<Digraph> pp;

   concepts::ReadMap<Arc,bool> am;

   {

     DType dfs_test(G);

     const DType& const_dfs_test = dfs_test;

     dfs_test.run(s);

     dfs_test.run(s,t);

     dfs_test.run();

     dfs_test.init();

     dfs_test.addSource(s);

     e = dfs_test.processNextArc();

     e = const_dfs_test.nextArc();

     b = const_dfs_test.emptyQueue();

     i = const_dfs_test.queueSize();

     dfs_test.start();

     dfs_test.start(t);

     dfs_test.start(am);

     l  = const_dfs_test.dist(t);

     e  = const_dfs_test.predArc(t);

     s  = const_dfs_test.predNode(t);

     b  = const_dfs_test.reached(t);

     d  = const_dfs_test.distMap();

     p  = const_dfs_test.predMap();

     pp = const_dfs_test.path(t);

   }

   {

     DType

       ::SetPredMap<concepts::ReadWriteMap<Node,Arc> >

       ::SetDistMap<concepts::ReadWriteMap<Node,int> >

       ::SetReachedMap<concepts::ReadWriteMap<Node,bool> >

       ::SetStandardProcessedMap

       ::SetProcessedMap<concepts::WriteMap<Node,bool> >

       ::Create dfs_test(G);

     concepts::ReadWriteMap<Node,Arc> pred_map;

     concepts::ReadWriteMap<Node,int> dist_map;

     concepts::ReadWriteMap<Node,bool> reached_map;

     concepts::WriteMap<Node,bool> processed_map;

     dfs_test

       .predMap(pred_map)

       .distMap(dist_map)

       .reachedMap(reached_map)

       .processedMap(processed_map);

     dfs_test.run(s);

     dfs_test.run(s,t);

     dfs_test.run();

     dfs_test.init();

     dfs_test.addSource(s);

     e = dfs_test.processNextArc();

     e = dfs_test.nextArc();

     b = dfs_test.emptyQueue();

     i = dfs_test.queueSize();

     dfs_test.start();

     dfs_test.start(t);

     dfs_test.start(am);

     l  = dfs_test.dist(t);

     e  = dfs_test.predArc(t);

     s  = dfs_test.predNode(t);

     b  = dfs_test.reached(t);

     pp = dfs_test.path(t);

   }

 }

 void checkDfsFunctionCompile()

 {

   typedef int VType;

   typedef concepts::Digraph Digraph;

   typedef Digraph::Arc Arc;

   typedef Digraph::Node Node;

   Digraph g;

   bool b;

   ::lemon::ignore_unused_variable_warning(b);

   dfs(g).run(Node());

   b=dfs(g).run(Node(),Node());

   dfs(g).run();

   dfs(g)

     .predMap(concepts::ReadWriteMap<Node,Arc>())

     .distMap(concepts::ReadWriteMap<Node,VType>())

     .reachedMap(concepts::ReadWriteMap<Node,bool>())

     .processedMap(concepts::WriteMap<Node,bool>())

     .run(Node());

   b=dfs(g)

     .predMap(concepts::ReadWriteMap<Node,Arc>())

     .distMap(concepts::ReadWriteMap<Node,VType>())

     .reachedMap(concepts::ReadWriteMap<Node,bool>())

     .processedMap(concepts::WriteMap<Node,bool>())

     .path(concepts::Path<Digraph>())

     .dist(VType())

     .run(Node(),Node());

   dfs(g)

     .predMap(concepts::ReadWriteMap<Node,Arc>())

     .distMap(concepts::ReadWriteMap<Node,VType>())

     .reachedMap(concepts::ReadWriteMap<Node,bool>())

     .processedMap(concepts::WriteMap<Node,bool>())

     .run();

 }

 template <class Digraph>

 void checkDfs() {

   TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

   Digraph G;

   Node s, t;

   Node s1, t1;

   std::istringstream input(test_lgf);

   digraphReader(G, input).

     node("source", s).

     node("target", t).

     node("source1", s1).

     node("target1", t1).

     run();

   Dfs<Digraph> dfs_test(G);

   dfs_test.run(s);

   Path<Digraph> p = dfs_test.path(t);

   check(p.length() == dfs_test.dist(t),"path() found a wrong path.");

   check(checkPath(G, p),"path() found a wrong path.");

   check(pathSource(G, p) == s,"path() found a wrong path.");

   check(pathTarget(G, p) == t,"path() found a wrong path.");

   for(NodeIt v(G); v!=INVALID; ++v) {

     if (dfs_test.reached(v)) {

       check(v==s || dfs_test.predArc(v)!=INVALID, "Wrong tree.");

       if (dfs_test.predArc(v)!=INVALID ) {

         Arc e=dfs_test.predArc(v);

         Node u=G.source(e);

         check(u==dfs_test.predNode(v),"Wrong tree.");

         check(dfs_test.dist(v) - dfs_test.dist(u) == 1,

               "Wrong distance. (" << dfs_test.dist(u) << "->"

               << dfs_test.dist(v) << ")");

       }

     }

   }

   {

   Dfs<Digraph> dfs(G);

   check(dfs.run(s1,t1) && dfs.reached(t1),"Node 3 is reachable from Node 6.");

   }

   {

     NullMap<Node,Arc> myPredMap;

     dfs(G).predMap(myPredMap).run(s);

   }

 }

 int main()

 {

   checkDfs<ListDigraph>();

   checkDfs<SmartDigraph>();

   return 0;

 }