test/heap_test.h
author Peter Kovacs <kpeter@inf.elte.hu>
Sat, 05 Jul 2008 17:22:28 +0200
changeset 191 abc5b9d0c67e
permissions -rw-r--r--
lgf_demo.cc is merged with reader_writer_demo.cc (from SVN -r3501)
     1 /* -*- C++ -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library
     4  *
     5  * Copyright (C) 2003-2008
     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 <vector>
    20 #include <algorithm>
    21 
    22 #include <lemon/dijkstra.h>
    23 
    24 class IntIntMap : public std::vector<int> {
    25 public:
    26   typedef std::vector<int> Parent;
    27 
    28   typedef int Key;
    29   typedef int Value;
    30 
    31   IntIntMap() : Parent() {}
    32   IntIntMap(int n) : Parent(n) {}
    33   IntIntMap(int n, int v) : Parent(n, v) {}
    34 
    35   void set(int key, int value) {
    36     Parent::operator[](key) = value;
    37   }
    38 };
    39 
    40 
    41 template <typename _Heap>
    42 void heapSortTest(int n) {
    43   typedef _Heap Heap;
    44   IntIntMap map(n, -1);
    45 
    46   Heap heap(map);
    47   
    48   std::vector<int> v(n);
    49 
    50   for (int i = 0; i < n; ++i) {
    51     v[i] = rnd[1000];
    52     heap.push(i, v[i]);
    53   }
    54   std::sort(v.begin(), v.end());
    55   for (int i = 0; i < n; ++i) {
    56     check(v[i] == heap.prio() ,"Wrong order in heap sort.");
    57     heap.pop();
    58   }
    59 }
    60 
    61 template <typename _Heap>
    62 void heapIncreaseTest(int n) {
    63   typedef _Heap Heap;
    64   IntIntMap map(n, -1);
    65 
    66   Heap heap(map);
    67   
    68   std::vector<int> v(n);
    69 
    70   for (int i = 0; i < n; ++i) {
    71     v[i] = rnd[1000];
    72     heap.push(i, v[i]);
    73   }
    74   for (int i = 0; i < n; ++i) {
    75     v[i] += rnd[1000];
    76     heap.increase(i, v[i]);
    77   }
    78   std::sort(v.begin(), v.end());
    79   for (int i = 0; i < n; ++i) {
    80     check(v[i] == heap.prio() ,"Wrong order in heap increase test.");
    81     heap.pop();
    82   }
    83 }
    84 
    85 
    86 
    87 template <typename _Digraph, typename _LengthMap, typename _Heap>
    88 void dijkstraHeapTest(_Digraph& digraph, _LengthMap& length,
    89 		      typename _Digraph::Node& start) {
    90 
    91   typedef _Heap Heap;
    92   typedef _Digraph Digraph;
    93   typedef _LengthMap LengthMap;
    94 
    95   typedef typename Digraph::Node Node;
    96   typedef typename Digraph::Arc Arc;
    97   typedef typename Digraph::NodeIt NodeIt;
    98   typedef typename Digraph::ArcIt ArcIt;
    99 
   100   typename Dijkstra<Digraph, LengthMap>::template DefStandardHeap<Heap>::
   101     Create dijkstra(digraph, length);
   102 
   103   dijkstra.run(start);
   104 
   105   for(ArcIt e(digraph); e!=INVALID; ++e) {
   106     Node u=digraph.source(e); 
   107     Node v=digraph.target(e);
   108     if (dijkstra.reached(u)) {
   109       check( dijkstra.dist(v) - dijkstra.dist(u) <= length[e],
   110       	     "Error in a shortest path tree arc!");
   111     }
   112   }
   113 
   114   for(NodeIt v(digraph); v!=INVALID; ++v) {
   115     if ( dijkstra.reached(v) && dijkstra.predArc(v) != INVALID ) {
   116       Arc e=dijkstra.predArc(v);
   117       Node u=digraph.source(e);
   118       check( dijkstra.dist(v) - dijkstra .dist(u) == length[e],
   119 	     "Error in a shortest path tree arc!");
   120     }
   121   }
   122 
   123 }