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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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