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- // Copyright (C) 2013-2022 Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library is free
- // software; you can redistribute it and/or modify it under the terms
- // of the GNU General Public License as published by the Free Software
- // Foundation; either version 3, or (at your option) any later
- // version.
- // This library is distributed in the hope that it will be useful, but
- // WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- // General Public License for more details.
- // You should have received a copy of the GNU General Public License along
- // with this library; see the file COPYING3. If not see
- // <http://www.gnu.org/licenses/>.
- #ifndef _GLIBCXX_TESTSUITE_CONTAINER_GEN_H
- #define _GLIBCXX_TESTSUITE_CONTAINER_GEN_H
- #include <testsuite_container_traits.h>
- #include <random>
- #include <cstdlib> // getenv, atoi
- #include <cstdio> // printf, fflush
- namespace __gnu_test
- {
- template<typename ContainerType, typename Tester, typename RandomGen>
- void
- test_single_container(Tester test, RandomGen& rg, int length, int domain)
- {
- std::vector<int> values;
- auto dist = std::uniform_int_distribution<>(0, domain - 1);
- for(int i = 0; i < length; ++i)
- values.push_back(dist(rg));
- ContainerType con(values.data(), values.data() + length);
- test(con, rg);
- }
- template<typename ContainerType, typename Tester, typename RandomGen>
- void
- test_special_containers(Tester test, RandomGen& rg, int length)
- {
- std::vector<int> values(length);
- ContainerType con(values.data(), values.data() + length);
- for(int i = 0; i < length; ++i)
- values[i] = 0;
- test(con, rg);
- for(int i = 0; i < length; ++i)
- values[i] = i;
- test(con, rg);
- for(int i = 0; i < length; ++i)
- values[i] = -i;
- test(con, rg);
- }
- template<typename ContainerType, typename Tester>
- void
- test_containers(Tester test)
- {
- std::mt19937_64 random_gen;
- if (const char* v = std::getenv("GLIBCXX_SEED_TEST_RNG"))
- {
- // A single seed value is much smaller than the mt19937 state size,
- // but we're not trying to be cryptographically secure here.
- int s = std::atoi(v);
- if (s == 0)
- s = (int)std::random_device{}();
- std::printf("Using random seed %d\n", s);
- std::fflush(stdout);
- random_gen.seed((unsigned)s);
- }
- #ifdef SIMULATOR_TEST
- int loops = 10;
- #else
- int loops = 1000;
- #endif
- for(int i = 0; i < loops; ++i)
- test_special_containers<ContainerType>(test, random_gen, i);
- for(int i = 1; i < 100; ++i)
- for(int j = 0; j < loops; ++j)
- test_single_container<ContainerType>(test, random_gen, i, i);
- for(int i = 0; i < loops; ++i)
- {
- test_single_container<ContainerType>(test, random_gen, 10, 10);
- test_single_container<ContainerType>(test, random_gen, 100, 10);
- test_single_container<ContainerType>(test, random_gen, 1000, 10);
- test_single_container<ContainerType>(test, random_gen, 10, 1000);
- }
- #ifndef SIMULATOR_TEST
- for(int i = 0; i < 1000; ++i)
- {
- test_single_container<ContainerType>(test, random_gen, 10000, 10);
- test_single_container<ContainerType>(test, random_gen, 10000, 10000);
- }
- #endif
- }
- } // namespace __gnu_test
- #endif
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