1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2007 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_BENCH_TEST_H |
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20 | #define LEMON_BENCH_TEST_H |
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21 | |
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22 | #include<vector> |
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23 | #include<iostream> |
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24 | |
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25 | #include<lemon/graph_utils.h> |
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26 | #include<lemon/time_measure.h> |
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27 | |
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28 | ///A primitive primtest |
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29 | |
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30 | ///\bug 2 is not a prime according to this function! |
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31 | /// |
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32 | ///\bug This function should go out of header file. I'm making it |
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33 | /// inline for now. |
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34 | inline bool isPrim(int n) |
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35 | { |
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36 | if(n%2) { |
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37 | for(int k=3;n/k>=k;k+=2) |
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38 | if(!(n%k)) return false; |
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39 | return true; |
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40 | } |
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41 | return false; |
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42 | } |
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43 | |
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44 | ///Finds the smallest prime not less then \c n. |
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45 | |
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46 | ///\bug This function should go out of header file. I'm making it |
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47 | /// inline for now. |
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48 | inline int nextPrim(int n) |
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49 | { |
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50 | for(n+=!(n%2);!isPrim(n);n+=2) ; |
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51 | return n; |
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52 | } |
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53 | |
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54 | |
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55 | /// Class to generate consecutive primes |
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56 | class Primes |
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57 | { |
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58 | std::vector<int> primes; |
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59 | int n; |
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60 | |
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61 | bool isPrime(int m) |
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62 | { |
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63 | for(int i=0;m<primes[i]*primes[i];i++) if(!(m%primes[i])) return false; |
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64 | return true; |
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65 | } |
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66 | public: |
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67 | Primes() : n(1) {} |
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68 | |
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69 | int operator() () |
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70 | { |
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71 | if(primes.size()==0) { |
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72 | primes.push_back(2); |
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73 | return 2; |
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74 | } |
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75 | else { |
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76 | do n+=2; while(!isPrime(n)); |
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77 | primes.push_back(n); |
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78 | return n; |
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79 | } |
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80 | } |
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81 | }; |
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82 | |
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83 | inline void PrintTime(const char *ID, lemon::Timer &T) |
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84 | { |
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85 | lemon::TimeStamp S(T); |
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86 | std::cout << ID << ' ' << S.userTime() << ' ' |
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87 | << S.systemTime() << ' ' << S.realTime() << std::endl; |
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88 | } |
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89 | |
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90 | |
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91 | |
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92 | /// |
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93 | template<class Graph> |
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94 | void addHyperCube(Graph &G,int dim,std::vector<typename Graph::Node> &nodes) |
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95 | { |
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96 | GRAPH_TYPEDEFS(typename Graph); |
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97 | |
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98 | std::vector<int> bits(dim+1); |
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99 | bits[0]=1; |
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100 | for(int i=1;i<=dim;i++) bits[i]=2*bits[i-1]; |
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101 | |
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102 | for(int i=0;i<bits[dim];i++) { |
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103 | nodes.push_back(G.addNode()); |
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104 | for(int j=0;j<dim;j++) if(i&bits[j]) G.addEdge(nodes[i-bits[j]],nodes[i]); |
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105 | } |
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106 | } |
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107 | |
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108 | /// |
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109 | template<class Graph> |
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110 | void addBiDirHyperCube(Graph &G,int dim,std::vector<typename Graph::Node>&nodes) |
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111 | { |
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112 | GRAPH_TYPEDEFS(typename Graph); |
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113 | |
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114 | std::vector<int> bits(dim+1); |
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115 | bits[0]=1; |
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116 | for(int i=1;i<=dim;i++) bits[i]=2*bits[i-1]; |
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117 | |
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118 | for(int i=0;i<bits[dim];i++) { |
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119 | nodes.push_back(G.addNode()); |
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120 | for(int j=0;j<dim;j++) if(i&bits[j]) { |
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121 | G.addEdge(nodes[i-bits[j]],nodes[i]); |
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122 | G.addEdge(nodes[i],nodes[i-bits[j]]); |
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123 | } |
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124 | |
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125 | } |
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126 | } |
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127 | |
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128 | #endif |
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