1 ///////////////////////////////////////////////////////////////
2 // Copyright 2012 John Maddock. Distributed under the Boost
3 // Software License, Version 1.0. (See accompanying file
4 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
7 // Compare arithmetic results using fixed_int to GMP results.
11 # define _SCL_SECURE_NO_WARNINGS
14 #include <boost/multiprecision/cpp_int.hpp>
15 #include <boost/multiprecision/logged_adaptor.hpp>
16 #include <boost/multiprecision/debug_adaptor.hpp>
17 #include <boost/random/mersenne_twister.hpp>
18 #include <boost/random/uniform_int.hpp>
19 #include <boost/timer.hpp>
25 #include <boost/archive/text_iarchive.hpp>
26 #include <boost/archive/text_oarchive.hpp>
27 #include <boost/archive/binary_iarchive.hpp>
28 #include <boost/archive/binary_oarchive.hpp>
29 #include <boost/exception/all.hpp>
32 T generate_random(unsigned bits_wanted)
34 static boost::random::mt19937 gen;
35 typedef boost::random::mt19937::result_type random_type;
39 if(std::numeric_limits<T>::is_bounded && (bits_wanted == (unsigned)std::numeric_limits<T>::digits))
41 max_val = (std::numeric_limits<T>::max)();
42 digits = std::numeric_limits<T>::digits;
46 max_val = T(1) << bits_wanted;
50 unsigned bits_per_r_val = std::numeric_limits<random_type>::digits - 1;
51 while((random_type(1) << bits_per_r_val) > (gen.max)()) --bits_per_r_val;
53 unsigned terms_needed = digits / bits_per_r_val + 1;
56 for(unsigned i = 0; i < terms_needed; ++i)
66 void test_neg(const T& x, const boost::mpl::true_&)
72 boost::archive::text_oarchive oa(ss);
73 oa << static_cast<const T&>(val);
74 boost::archive::text_iarchive ia(ss);
77 BOOST_CHECK_EQUAL(val, val2);
80 boost::archive::binary_oarchive ob(ss);
81 ob << static_cast<const T&>(val);
82 boost::archive::binary_iarchive ib(ss);
84 BOOST_CHECK_EQUAL(val, val2);
86 catch(const boost::exception& e)
88 std::cout << "Caught boost::exception with:\n";
89 std::cout << diagnostic_information(e);
91 catch(const std::exception& e)
93 std::cout << "Caught std::exception with:\n";
94 std::cout << e.what() << std::endl;
98 void test_neg(const T& , const boost::mpl::false_&){}
103 using namespace boost::multiprecision;
105 boost::random::mt19937 gen;
106 boost::uniform_int<> d(3, std::numeric_limits<T>::is_bounded ? std::numeric_limits<T>::digits : 3000);
111 T val = generate_random<T>(d(gen));
114 std::stringstream ss;
115 boost::archive::text_oarchive oa(ss);
116 oa << static_cast<const T&>(val);
117 boost::archive::text_iarchive ia(ss);
120 BOOST_CHECK_EQUAL(val, val2);
123 boost::archive::binary_oarchive ob(ss);
124 ob << static_cast<const T&>(val);
125 boost::archive::binary_iarchive ib(ss);
127 BOOST_CHECK_EQUAL(val, val2);
129 catch(const boost::exception& e)
131 std::cout << "Caught boost::exception with:\n";
132 std::cout << diagnostic_information(e);
134 catch(const std::exception& e)
136 std::cout << "Caught std::exception with:\n";
137 std::cout << e.what() << std::endl;
140 test_neg(val, boost::mpl::bool_<std::numeric_limits<T>::is_signed>());
142 // Check to see if test is taking too long.
143 // Tests run on the compiler farm time out after 300 seconds,
144 // so don't get too close to that:
146 if(tim.elapsed() > 30)
148 std::cout << "Timeout reached, aborting tests now....\n";
156 using namespace boost::multiprecision;
157 test<number<logged_adaptor<cpp_int_backend<> > > >();
158 test<number<debug_adaptor<cpp_int_backend<> > > >();
159 return boost::report_errors();