1 #ifndef BENCHMARK_GENERATE_INPUT_HPP
2 #define BENCHMARK_GENERATE_INPUT_HPP
11 static const char Letters[] = {
14 'A','B','C','D','E','F',
19 'a','b','c','d','e','f',
25 static const std::size_t LettersSize = sizeof(Letters);
27 inline std::default_random_engine& getRandomEngine() {
28 static std::default_random_engine RandEngine(std::random_device{}());
32 inline char getRandomChar() {
33 std::uniform_int_distribution<> LettersDist(0, LettersSize-1);
34 return Letters[LettersDist(getRandomEngine())];
38 inline IntT getRandomInteger() {
39 std::uniform_int_distribution<IntT> dist;
40 return dist(getRandomEngine());
43 inline std::string getRandomString(std::size_t Len) {
44 std::string str(Len, 0);
45 std::generate_n(str.begin(), Len, &getRandomChar);
50 inline std::vector<IntT> getDuplicateIntegerInputs(size_t N) {
51 std::vector<IntT> inputs(N, static_cast<IntT>(-1));
56 inline std::vector<IntT> getSortedIntegerInputs(size_t N) {
57 std::vector<IntT> inputs;
58 for (size_t i=0; i < N; i += 1)
64 std::vector<IntT> getSortedLargeIntegerInputs(size_t N) {
65 std::vector<IntT> inputs;
66 for (size_t i=0; i < N; ++i) {
67 inputs.push_back(i + N);
73 std::vector<IntT> getSortedTopBitsIntegerInputs(size_t N) {
74 std::vector<IntT> inputs = getSortedIntegerInputs<IntT>(N);
75 for (auto& E : inputs) E <<= ((sizeof(IntT) / 2) * CHAR_BIT);
80 inline std::vector<IntT> getReverseSortedIntegerInputs(size_t N) {
81 std::vector<IntT> inputs;
91 std::vector<IntT> getPipeOrganIntegerInputs(size_t N) {
92 std::vector<IntT> v; v.reserve(N);
93 for (size_t i = 0; i < N/2; ++i) v.push_back(i);
94 for (size_t i = N/2; i < N; ++i) v.push_back(N - i);
100 std::vector<IntT> getRandomIntegerInputs(size_t N) {
101 std::vector<IntT> inputs;
102 for (size_t i=0; i < N; ++i) {
103 inputs.push_back(getRandomInteger<IntT>());
108 inline std::vector<std::string> getDuplicateStringInputs(size_t N) {
109 std::vector<std::string> inputs(N, getRandomString(1024));
113 inline std::vector<std::string> getRandomStringInputs(size_t N) {
114 std::vector<std::string> inputs;
115 for (size_t i=0; i < N; ++i) {
116 inputs.push_back(getRandomString(1024));
121 inline std::vector<std::string> getSortedStringInputs(size_t N) {
122 std::vector<std::string> inputs = getRandomStringInputs(N);
123 std::sort(inputs.begin(), inputs.end());
127 inline std::vector<std::string> getReverseSortedStringInputs(size_t N) {
128 std::vector<std::string> inputs = getSortedStringInputs(N);
129 std::reverse(inputs.begin(), inputs.end());
133 inline std::vector<const char*> getRandomCStringInputs(size_t N) {
134 static std::vector<std::string> inputs = getRandomStringInputs(N);
135 std::vector<const char*> cinputs;
136 for (auto const& str : inputs)
137 cinputs.push_back(str.c_str());
142 #endif // BENCHMARK_GENERATE_INPUT_HPP