1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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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) 2003-2009 |
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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 | #include <lemon/time_measure.h> |
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20 | #include <lemon/smart_graph.h> |
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21 | #include <lemon/maps.h> |
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22 | #include <lemon/radix_sort.h> |
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23 | #include <lemon/math.h> |
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24 | |
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25 | #include "test_tools.h" |
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26 | |
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27 | #include <vector> |
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28 | #include <algorithm> |
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29 | |
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30 | using namespace lemon; |
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31 | |
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32 | static const int n = 10000; |
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33 | |
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34 | struct Negate { |
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35 | typedef int argument_type; |
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36 | typedef int result_type; |
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37 | int operator()(int a) { return - a; } |
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38 | }; |
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39 | |
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40 | int negate(int a) { return - a; } |
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41 | |
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42 | |
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43 | void generateIntSequence(int n, std::vector<int>& data) { |
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44 | int prime = 9973; |
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45 | int root = 136, value = 1; |
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46 | for (int i = 0; i < n; ++i) { |
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47 | data.push_back(value - prime / 2); |
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48 | value = (value * root) % prime; |
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49 | } |
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50 | } |
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51 | |
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52 | void generateCharSequence(int n, std::vector<unsigned char>& data) { |
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53 | int prime = 251; |
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54 | int root = 3, value = root; |
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55 | for (int i = 0; i < n; ++i) { |
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56 | data.push_back(static_cast<unsigned char>(value)); |
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57 | value = (value * root) % prime; |
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58 | } |
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59 | } |
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60 | |
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61 | void checkRadixSort() { |
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62 | { |
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63 | std::vector<int> data1; |
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64 | generateIntSequence(n, data1); |
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65 | |
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66 | std::vector<int> data2(data1); |
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67 | std::sort(data1.begin(), data1.end()); |
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68 | |
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69 | radixSort(data2.begin(), data2.end()); |
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70 | for (int i = 0; i < n; ++i) { |
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71 | check(data1[i] == data2[i], "Test failed"); |
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72 | } |
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73 | |
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74 | radixSort(data2.begin(), data2.end(), Negate()); |
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75 | for (int i = 0; i < n; ++i) { |
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76 | check(data1[i] == data2[n - 1 - i], "Test failed"); |
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77 | } |
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78 | |
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79 | radixSort(data2.begin(), data2.end(), negate); |
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80 | for (int i = 0; i < n; ++i) { |
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81 | check(data1[i] == data2[n - 1 - i], "Test failed"); |
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82 | } |
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83 | |
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84 | } |
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85 | |
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86 | { |
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87 | std::vector<unsigned char> data1(n); |
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88 | generateCharSequence(n, data1); |
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89 | |
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90 | std::vector<unsigned char> data2(data1); |
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91 | std::sort(data1.begin(), data1.end()); |
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92 | |
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93 | radixSort(data2.begin(), data2.end()); |
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94 | for (int i = 0; i < n; ++i) { |
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95 | check(data1[i] == data2[i], "Test failed"); |
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96 | } |
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97 | |
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98 | } |
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99 | } |
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100 | |
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101 | |
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102 | void checkStableRadixSort() { |
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103 | { |
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104 | std::vector<int> data1; |
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105 | generateIntSequence(n, data1); |
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106 | |
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107 | std::vector<int> data2(data1); |
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108 | std::sort(data1.begin(), data1.end()); |
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109 | |
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110 | stableRadixSort(data2.begin(), data2.end()); |
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111 | for (int i = 0; i < n; ++i) { |
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112 | check(data1[i] == data2[i], "Test failed"); |
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113 | } |
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114 | |
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115 | stableRadixSort(data2.begin(), data2.end(), Negate()); |
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116 | for (int i = 0; i < n; ++i) { |
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117 | check(data1[i] == data2[n - 1 - i], "Test failed"); |
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118 | } |
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119 | |
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120 | stableRadixSort(data2.begin(), data2.end(), negate); |
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121 | for (int i = 0; i < n; ++i) { |
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122 | check(data1[i] == data2[n - 1 - i], "Test failed"); |
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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 | std::vector<unsigned char> data1(n); |
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128 | generateCharSequence(n, data1); |
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129 | |
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130 | std::vector<unsigned char> data2(data1); |
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131 | std::sort(data1.begin(), data1.end()); |
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132 | |
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133 | radixSort(data2.begin(), data2.end()); |
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134 | for (int i = 0; i < n; ++i) { |
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135 | check(data1[i] == data2[i], "Test failed"); |
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136 | } |
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137 | |
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138 | } |
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139 | } |
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140 | |
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141 | int main() { |
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142 | |
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143 | checkRadixSort(); |
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144 | checkStableRadixSort(); |
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145 | |
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146 | return 0; |
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147 | } |
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