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Diffstat (limited to 'libs/random/test/test_const_mod.cpp')
| -rw-r--r-- | libs/random/test/test_const_mod.cpp | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/libs/random/test/test_const_mod.cpp b/libs/random/test/test_const_mod.cpp new file mode 100644 index 0000000000..b3b43575fa --- /dev/null +++ b/libs/random/test/test_const_mod.cpp @@ -0,0 +1,183 @@ +/* test_const_mod.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: test_const_mod.cpp 71018 2011-04-05 21:27:52Z steven_watanabe $ + * + */ + +#include <boost/random/detail/const_mod.hpp> + +#include <boost/cstdint.hpp> +#include <boost/mpl/vector.hpp> + +#define BOOST_TEST_MAIN +#include <boost/test/unit_test.hpp> + +typedef boost::mpl::vector< + boost::int8_t, + boost::uint8_t +> int8_types; + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_mult8, IntType, int8_types) { + for(int i = 0; i < 127; ++i) { + for(int j = 0; j < 127; ++j) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 127>::mult(IntType(i), IntType(j))), i * j % 127); + } + } + int modulus = (std::numeric_limits<IntType>::max)() + 1; + for(int i = 0; i < modulus; ++i) { + for(int j = 0; j < modulus; ++j) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 0>::mult(IntType(i), IntType(j))), i * j % modulus); + } + } +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_add8, IntType, int8_types) { + for(int i = 0; i < 127; ++i) { + for(int j = 0; j < 127; ++j) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 127>::add(IntType(i), IntType(j))), (i + j) % 127); + } + } + { + const int modulus = boost::integer_traits<IntType>::const_max; + for(int i = 0; i < modulus; ++i) { + for(int j = 0; j < modulus; ++j) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, modulus>::add(IntType(i), IntType(j))), (i + j) % modulus); + } + } + } + { + int modulus = (std::numeric_limits<IntType>::max)() + 1; + for(int i = 0; i < modulus; ++i) { + for(int j = 0; j < modulus; ++j) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 0>::add(IntType(i), IntType(j))), (i + j) % modulus); + } + } + } +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_mult_add8, IntType, int8_types) { + for(int i = 0; i < 127; i += 5) { + for(int j = 0; j < 127; j += 3) { + for(int k = 0; k < 127; k += 3) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 127>::mult_add(IntType(i), IntType(j), IntType(k))), (i * j + k) % 127); + } + } + } + { + int modulus = (std::numeric_limits<IntType>::max)() + 1; + for(int i = 0; i < modulus; i += 5) { + for(int j = 0; j < modulus; j += 3) { + for(int k = 0; k < modulus; k += 3) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 0>::mult_add(IntType(i), IntType(j), IntType(k))), (i * j + k) % modulus); + } + } + } + } +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_invert8, IntType, int8_types) { + for(int i = 1; i < 127; ++i) { + IntType inverse = boost::random::const_mod<IntType, 127>::invert(IntType(i)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 127>::mult(IntType(i), inverse)), 1); + } + int modulus = (std::numeric_limits<IntType>::max)() + 1; + for(int i = 1; i < modulus; i += 2) { + IntType inverse = boost::random::const_mod<IntType, 0>::invert(IntType(i)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 0>::mult(IntType(i), inverse)), 1); + } +} + +typedef boost::mpl::vector< + boost::int32_t, + boost::uint32_t +> int32_types; + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_mult32, IntType, int32_types) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(0, 0)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(0, 2147483562)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(2147483562, 0)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(2147483562, 2147483562)), IntType(1)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(1234567890, 1234657890)), IntType(813106682)); +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_add32, IntType, int32_types) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::add(0, 0)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::add(0, 2147483562)), IntType(2147483562)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::add(2147483562, 0)), IntType(2147483562)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::add(2147483562, 2147483562)), IntType(2147483561)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::add(1234567890, 1234657890)), IntType(321742217)); +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_mult_add32, IntType, int32_types) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult_add(0, 0, 0)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult_add(0, 2147483562, 827364)), IntType(827364)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult_add(2147483562, 0, 827364)), IntType(827364)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult_add(2147483562, 2147483562, 2147483562)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult_add(1234567890, 1234657890, 1726384759)), IntType(392007878)); +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_invert32, IntType, int32_types) { + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::invert(0)), IntType(0)); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult_add(0, 0, 0)), IntType(0)); + IntType inverse; + inverse = boost::random::const_mod<IntType, 2147483563>::invert(2147483562); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(2147483562, inverse)), IntType(1)); + inverse = boost::random::const_mod<IntType, 2147483563>::invert(1234567890); + BOOST_CHECK_EQUAL((boost::random::const_mod<IntType, 2147483563>::mult(1234567890, inverse)), IntType(1)); +} + +#if !defined(BOOST_NO_INT64_T) + +typedef boost::mpl::vector< + boost::int64_t, + boost::uint64_t +> int64_types; + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_mult64, IntType, int64_types) { + typedef boost::random::const_mod<IntType, INT64_C(2147483563652738498)> const_mod_type; + BOOST_CHECK_EQUAL((const_mod_type::mult(0, 0)), IntType(0)); + BOOST_CHECK_EQUAL((const_mod_type::mult(0, 2147483562)), IntType(0)); + BOOST_CHECK_EQUAL((const_mod_type::mult(2147483562, 0)), IntType(0)); + BOOST_CHECK_EQUAL((const_mod_type::mult(2147483562, 2147483562)), IntType(INT64_C(316718521754730848))); + BOOST_CHECK_EQUAL((const_mod_type::mult(1234567890, 1234657890)), IntType(INT64_C(1524268986129152100))); + BOOST_CHECK_EQUAL((const_mod_type::mult(INT64_C(1234567890726352938), INT64_C(1234657890736453927))), IntType(INT64_C(88656187017794672))); +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_add64, IntType, int64_types) { + typedef boost::random::const_mod<IntType, INT64_C(2147483563652738498)> const_mod_type; + BOOST_CHECK_EQUAL((const_mod_type::add(0, 0)), IntType(0)); + BOOST_CHECK_EQUAL((const_mod_type::add(0, 2147483562)), IntType(2147483562)); + BOOST_CHECK_EQUAL((const_mod_type::add(2147483562, 0)), IntType(2147483562)); + BOOST_CHECK_EQUAL((const_mod_type::add(2147483562, 2147483562)), IntType(4294967124U)); + BOOST_CHECK_EQUAL((const_mod_type::add(1234567890, 1234657890)), IntType(2469225780U)); + BOOST_CHECK_EQUAL((const_mod_type::add(INT64_C(1234567890726352938), INT64_C(1234657890736453927))), IntType(INT64_C(321742217810068367))); + BOOST_CHECK_EQUAL((const_mod_type::add(INT64_C(2147483563652738490), 8)), IntType(0)); +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_mult_add64, IntType, int64_types) { + typedef boost::random::const_mod<IntType, INT64_C(2147483563652738498)> const_mod_type; + BOOST_CHECK_EQUAL((const_mod_type::mult_add(0, 0, 0)), IntType(0)); + BOOST_CHECK_EQUAL((const_mod_type::mult_add(0, 2147483562, 827364)), IntType(827364)); + BOOST_CHECK_EQUAL((const_mod_type::mult_add(2147483562, 0, 827364)), IntType(827364)); + BOOST_CHECK_EQUAL((const_mod_type::mult_add(2147483562, 2147483562, 2147483562)), IntType(INT64_C(316718523902214410))); + BOOST_CHECK_EQUAL((const_mod_type::mult_add(1234567890, 1234657890, 1726384759)), IntType(INT64_C(1524268987855536859))); + BOOST_CHECK_EQUAL((const_mod_type::mult_add(INT64_C(1234567890726352938), INT64_C(1234657890736453927), INT64_C(1726384759726488649))), IntType(INT64_C(1815040946744283321))); +} + +BOOST_AUTO_TEST_CASE_TEMPLATE(test_invert64, IntType, int64_types) { + typedef boost::random::const_mod<IntType, INT64_C(2147483563652738498)> const_mod_type; + BOOST_CHECK_EQUAL((const_mod_type::invert(0)), IntType(0)); + BOOST_CHECK_EQUAL((const_mod_type::mult_add(0, 0, 0)), IntType(0)); + IntType inverse; + inverse = const_mod_type::invert(INT64_C(7362947769)); + BOOST_CHECK_EQUAL((const_mod_type::mult(INT64_C(7362947769), inverse)), IntType(1)); + inverse = const_mod_type::invert(INT64_C(1263142436887493875)); + BOOST_CHECK_EQUAL((const_mod_type::mult(INT64_C(1263142436887493875), inverse)), IntType(1)); +} + +#endif |