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/* test_mt19937.cpp
*
* Copyright Steven Watanabe 2011
* Distributed under the Boost Software License, Version 1.0. (See
* accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
* $Id$
*
*/
#include <boost/random/mersenne_twister.hpp>
#include <algorithm>
#include <vector>
#include <boost/cstdint.hpp>
#define BOOST_RANDOM_URNG boost::random::mt19937
#define BOOST_RANDOM_SEED_WORDS 624
// validation by experiment from mt19937.c
#define BOOST_RANDOM_VALIDATION_VALUE 4123659995U
#define BOOST_RANDOM_SEED_SEQ_VALIDATION_VALUE 666528879U
#define BOOST_RANDOM_ITERATOR_VALIDATION_VALUE 3408548740U
#define BOOST_RANDOM_GENERATE_VALUES { 0xD091BB5CU, 0x22AE9EF6U, 0xE7E1FAEEU, 0xD5C31F79U }
#include "test_generator.ipp"
struct seed_seq_0 {
template<class It>
void generate(It begin, It end) const {
std::fill(begin, end, boost::uint32_t(0));
}
};
struct seed_seq_1 {
template<class It>
void generate(It begin, It end) const {
std::fill(begin, end, boost::uint32_t(0));
*(end - 1) = 1;
}
};
BOOST_AUTO_TEST_CASE(test_special_seed) {
{
seed_seq_1 seed;
std::vector<boost::uint32_t> vec(624);
seed.generate(vec.begin(), vec.end());
std::vector<boost::uint32_t>::iterator it = vec.begin();
boost::mt19937 gen1(it, vec.end());
BOOST_CHECK_EQUAL(gen1(), 0);
BOOST_CHECK_EQUAL(gen1(), 0);
boost::mt19937 gen2(seed);
BOOST_CHECK_EQUAL(gen2(), 0);
BOOST_CHECK_EQUAL(gen2(), 0);
BOOST_CHECK_EQUAL(gen1, gen2);
}
{
seed_seq_0 seed;
std::vector<boost::uint32_t> vec(624);
seed.generate(vec.begin(), vec.end());
std::vector<boost::uint32_t>::iterator it = vec.begin();
boost::mt19937 gen1(it, vec.end());
BOOST_CHECK_EQUAL(gen1(), 1141379330u);
BOOST_CHECK_EQUAL(gen1(), 0);
boost::mt19937 gen2(seed);
BOOST_CHECK_EQUAL(gen2(), 1141379330u);
BOOST_CHECK_EQUAL(gen2(), 0);
BOOST_CHECK_EQUAL(gen1, gen2);
}
}
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