/* -*- C++ -*-

  * test/test_tools.h - Part of LEMON, a generic C++ optimization library

  *

  * Copyright (C) 2006 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.

  *

  */

 #ifndef LEMON_TEST_TEST_TOOLS_H

 #define LEMON_TEST_TEST_TOOLS_H

 #include <iostream>

 #include <vector>

 #include <cstdlib>

 #include <ctime>

 #include <lemon/invalid.h>

 #include <lemon/concept_check.h>

 using namespace lemon;

 //! \ingroup misc

 //! \file

 //! \brief Some utilities to write test programs.

 ///If \c rc is fail, writes an error message end exit.

 ///If \c rc is fail, writes an error message end exit.

 ///The error message contains the file name and the line number of the

 ///source code in a standard from, which makes it possible to go there

 ///using good source browsers like e.g. \c emacs.

 ///

 ///For example

 ///\code check(0==1,"This is obviously false.");\endcode will

 ///print this (and then exits).

 ///\verbatim graph_test.cc:123: error: This is obviously false. \endverbatim

 ///

 ///\todo It should be in \c error.h

 #define check(rc, msg) \

   if(!(rc)) { \

     std::cerr << __FILE__ ":" << __LINE__ << ": error: " << msg << std::endl; \

     exit(1); \

   } else { } \

 ///Structure returned by \ref addPetersen().

 ///Structure returned by \ref addPetersen().

 ///

 template<class Graph> struct PetStruct

 {

   ///Vector containing the outer nodes.

   std::vector<typename Graph::Node> outer;

   ///Vector containing the inner nodes.

   std::vector<typename Graph::Node> inner;

   ///Vector containing the edges of the inner circle.

   std::vector<typename Graph::Edge> incir;

   ///Vector containing the edges of the outer circle.

   std::vector<typename Graph::Edge> outcir;

   ///Vector containing the chord edges.

   std::vector<typename Graph::Edge> chords;

 };

 ///Adds a Petersen graph to \c G.

 ///Adds a Petersen graph to \c G.

 ///\return The nodes and edges of the generated graph.

 template<typename Graph>

 PetStruct<Graph> addPetersen(Graph &G,int num = 5)

 {

   PetStruct<Graph> n;

   for(int i=0;i<num;i++) {

     n.outer.push_back(G.addNode());

     n.inner.push_back(G.addNode());

   }

  for(int i=0;i<num;i++) {

    n.chords.push_back(G.addEdge(n.outer[i],n.inner[i]));

    n.outcir.push_back(G.addEdge(n.outer[i],n.outer[(i+1) % num]));

    n.incir.push_back(G.addEdge(n.inner[i],n.inner[(i+2) % num]));

   }

  return n;

 }

 /// \brief Adds to the graph the reverse pair of all edges.

 ///

 /// Adds to the graph the reverse pair of all edges.

 ///

 template<class Graph> void bidirGraph(Graph &G)

 {

   typedef typename Graph::Edge Edge;

   typedef typename Graph::EdgeIt EdgeIt;

   std::vector<Edge> ee;

   for(EdgeIt e(G);e!=INVALID;++e) ee.push_back(e);

   for(typename std::vector<Edge>::iterator p=ee.begin();p!=ee.end();p++)

     G.addEdge(G.target(*p),G.source(*p));

 }

 /// \brief Checks the bidirectioned Petersen graph.

 ///

 ///  Checks the bidirectioned Petersen graph.

 ///

 template<class Graph> void checkBidirPetersen(Graph &G, int num = 5)

 {

   typedef typename Graph::Node Node;

   typedef typename Graph::EdgeIt EdgeIt;

   typedef typename Graph::NodeIt NodeIt;

   checkGraphNodeList(G, 2 * num);

   checkGraphEdgeList(G, 6 * num);

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

     checkGraphInEdgeList(G, n, 3);

     checkGraphOutEdgeList(G, n, 3);

   }  

 }

 ///Structure returned by \ref addUndirPetersen().

 ///Structure returned by \ref addUndirPetersen().

 ///

 template<class Graph> struct UndirPetStruct

 {

   ///Vector containing the outer nodes.

   std::vector<typename Graph::Node> outer;

   ///Vector containing the inner nodes.

   std::vector<typename Graph::Node> inner;

   ///Vector containing the edges of the inner circle.

   std::vector<typename Graph::UndirEdge> incir;

   ///Vector containing the edges of the outer circle.

   std::vector<typename Graph::UndirEdge> outcir;

   ///Vector containing the chord edges.

   std::vector<typename Graph::UndirEdge> chords;

 };

 ///Adds a Petersen graph to the undirected \c G.

 ///Adds a Petersen graph to the undirected \c G.

 ///\return The nodes and edges of the generated graph.

 template<typename Graph>

 UndirPetStruct<Graph> addUndirPetersen(Graph &G,int num=5)

 {

   UndirPetStruct<Graph> n;

   for(int i=0;i<num;i++) {

     n.outer.push_back(G.addNode());

     n.inner.push_back(G.addNode());

   }

  for(int i=0;i<num;i++) {

    n.chords.push_back(G.addEdge(n.outer[i],n.inner[i]));

    n.outcir.push_back(G.addEdge(n.outer[i],n.outer[(i+1)%5]));

    n.incir.push_back(G.addEdge(n.inner[i],n.inner[(i+2)%5]));

   }

  return n;

 }

 int _urandom_init() {

   int seed = time(0);

   srand(seed);

   return seed;

 }

 int urandom(int n) {

   static int seed = _urandom_init();

   ignore_unused_variable_warning(seed);

   return (int)(rand() / (1.0 + RAND_MAX) * n);

 }

 #endif