1 | // -*- mode:C++ -*- |
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2 | #ifndef LEMON_BENCH_TEST_H |
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3 | #define LEMON_BENCH_TEST_H |
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4 | |
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5 | #include<vector> |
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6 | #include<iostream> |
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7 | |
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8 | #include<lemon/graph_utils.h> |
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9 | #include<lemon/time_measure.h> |
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10 | |
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11 | ///A primitive primtest |
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12 | |
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13 | ///\bug 2 is not a prime according to this function! |
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14 | /// |
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15 | ///\bug This function should go out of header file. I'm making it |
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16 | /// inline for now. |
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17 | inline bool isPrim(int n) |
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18 | { |
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19 | if(n%2) { |
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20 | for(int k=3;n/k>=k;k+=2) |
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21 | if(!(n%k)) return false; |
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22 | return true; |
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23 | } |
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24 | return false; |
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25 | } |
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26 | |
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27 | ///Finds the smallest prime not less then \c n. |
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28 | |
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29 | ///\bug This function should go out of header file. I'm making it |
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30 | /// inline for now. |
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31 | inline int nextPrim(int n) |
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32 | { |
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33 | for(n+=!(n%2);!isPrim(n);n+=2) ; |
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34 | return n; |
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35 | } |
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36 | |
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37 | |
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38 | /// Class to generate consecutive primes |
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39 | class Primes |
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40 | { |
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41 | std::vector<int> primes; |
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42 | int n; |
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43 | |
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44 | bool isPrime(int m) |
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45 | { |
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46 | for(int i=0;m<primes[i]*primes[i];i++) if(!(m%primes[i])) return false; |
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47 | return true; |
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48 | } |
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49 | public: |
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50 | Primes() : n(1) {} |
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51 | |
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52 | int operator() () |
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53 | { |
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54 | if(primes.size()==0) { |
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55 | primes.push_back(2); |
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56 | return 2; |
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57 | } |
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58 | else { |
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59 | do n+=2; while(!isPrime(n)); |
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60 | primes.push_back(n); |
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61 | return n; |
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62 | } |
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63 | } |
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64 | }; |
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65 | |
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66 | inline void PrintTime(char *ID,lemon::Timer &T) |
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67 | { |
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68 | lemon::TimeStamp S(T); |
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69 | std::cout << ID << ' ' << S.userTime() << ' ' |
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70 | << S.systemTime() << ' ' << S.realTime() << std::endl; |
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71 | } |
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72 | |
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73 | |
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74 | |
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75 | /// |
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76 | template<class Graph> |
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77 | void addHyperCube(Graph &G,int dim,std::vector<typename Graph::Node> &nodes) |
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78 | { |
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79 | GRAPH_TYPEDEFS(typename Graph); |
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80 | |
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81 | std::vector<int> bits(dim+1); |
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82 | bits[0]=1; |
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83 | for(int i=1;i<=dim;i++) bits[i]=2*bits[i-1]; |
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84 | |
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85 | for(int i=0;i<bits[dim];i++) { |
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86 | nodes.push_back(G.addNode()); |
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87 | for(int j=0;j<dim;j++) if(i&bits[j]) G.addEdge(nodes[i-bits[j]],nodes[i]); |
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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 | template<class Graph> |
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93 | void addBiDirHyperCube(Graph &G,int dim,std::vector<typename Graph::Node>&nodes) |
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94 | { |
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95 | GRAPH_TYPEDEFS(typename Graph); |
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96 | |
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97 | std::vector<int> bits(dim+1); |
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98 | bits[0]=1; |
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99 | for(int i=1;i<=dim;i++) bits[i]=2*bits[i-1]; |
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100 | |
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101 | for(int i=0;i<bits[dim];i++) { |
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102 | nodes.push_back(G.addNode()); |
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103 | for(int j=0;j<dim;j++) if(i&bits[j]) { |
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104 | G.addEdge(nodes[i-bits[j]],nodes[i]); |
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105 | G.addEdge(nodes[i],nodes[i-bits[j]]); |
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106 | } |
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107 | |
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108 | } |
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109 | } |
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110 | |
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111 | #endif |
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