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 https://www.boost.org/LICENSE_1_0.txt
5
6 #ifdef _MSC_VER
7 #define _SCL_SECURE_NO_WARNINGS
8 #endif
9
10 #if defined(HAS_MPFR)
11
12 #include <boost/multiprecision/cpp_int.hpp>
13 #include <boost/random/mersenne_twister.hpp>
14 #include <boost/random/uniform_int.hpp>
15 #include "test.hpp"
16
17 #if defined(HAS_GMP)
18 #include <boost/multiprecision/gmp.hpp>
19 #endif
20 #if defined(HAS_MPFR)
21 #include <boost/multiprecision/mpfr.hpp>
22 #endif
23 #if defined(HAS_MPFI)
24 #include <boost/multiprecision/mpfi.hpp>
25 #endif
26 #ifdef HAS_TOMMATH
27 #include <boost/multiprecision/tommath.hpp>
28 #endif
29 #ifdef HAS_FLOAT128
30 #include <boost/multiprecision/float128.hpp>
31 #endif
32 #include <boost/multiprecision/cpp_bin_float.hpp>
33 #include <boost/multiprecision/cpp_dec_float.hpp>
34
35 using namespace boost::multiprecision;
36
37 #ifdef BOOST_MSVC
38 #pragma warning(disable : 4127)
39 #endif
40
41 template <class T>
generate_random()42 T generate_random()
43 {
44 typedef int e_type;
45 static boost::random::mt19937 gen;
46 T val = gen();
47 T prev_val = -1;
48 while (val != prev_val)
49 {
50 val *= (gen.max)();
51 prev_val = val;
52 val += gen();
53 }
54 e_type e;
55 val = frexp(val, &e);
56
57 static boost::random::uniform_int_distribution<e_type> ui(-20, 20);
58 return ldexp(val, ui(gen));
59 }
60
61 template <class From, class To>
test_convert_neg_int(From from,const boost::mpl::true_ &)62 void test_convert_neg_int(From from, const boost::mpl::true_&)
63 {
64 from = -from;
65 To t3(from);
66 To t4 = from.template convert_to<To>();
67 BOOST_CHECK_EQUAL(From(trunc(from)), From(t3));
68 BOOST_CHECK_EQUAL(From(trunc(from)), From(t4));
69 }
70 template <class From, class To>
test_convert_neg_int(From const &,const boost::mpl::false_ &)71 void test_convert_neg_int(From const&, const boost::mpl::false_&)
72 {
73 }
74
75 template <class From, class To>
test_convert_imp(boost::mpl::int_<number_kind_floating_point> const &,boost::mpl::int_<number_kind_integer> const &)76 void test_convert_imp(boost::mpl::int_<number_kind_floating_point> const&, boost::mpl::int_<number_kind_integer> const&)
77 {
78 for (unsigned i = 0; i < 100; ++i)
79 {
80 From from = generate_random<From>();
81 To t1(from);
82 To t2 = from.template convert_to<To>();
83 BOOST_CHECK_EQUAL(From(trunc(from)), From(t1));
84 BOOST_CHECK_EQUAL(From(trunc(from)), From(t2));
85 test_convert_neg_int<From, To>(from, boost::mpl::bool_ < std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
86 }
87 }
88
89 template <class From, class To>
test_convert_neg_rat(From from,const boost::mpl::true_ &)90 void test_convert_neg_rat(From from, const boost::mpl::true_&)
91 {
92 from = -from;
93 To t3(from);
94 To t4 = from.template convert_to<To>();
95 BOOST_CHECK_EQUAL(From(t3), from);
96 BOOST_CHECK_EQUAL(From(t4), from);
97 }
98 template <class From, class To>
test_convert_rat_int(From const &,const boost::mpl::false_ &)99 void test_convert_rat_int(From const&, const boost::mpl::false_&)
100 {
101 }
102
103 template <class From, class To>
test_convert_imp(boost::mpl::int_<number_kind_floating_point> const &,boost::mpl::int_<number_kind_rational> const &)104 void test_convert_imp(boost::mpl::int_<number_kind_floating_point> const&, boost::mpl::int_<number_kind_rational> const&)
105 {
106 for (unsigned i = 0; i < 100; ++i)
107 {
108 From from = generate_random<From>();
109 To t1(from);
110 To t2 = from.template convert_to<To>();
111 BOOST_CHECK_EQUAL(From(t1), from);
112 BOOST_CHECK_EQUAL(From(t2), from);
113 test_convert_neg_rat<From, To>(from, boost::mpl::bool_ < std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
114 }
115 }
116
117 template <class From, class To>
test_convert_neg_float(From from,const boost::mpl::true_ &)118 void test_convert_neg_float(From from, const boost::mpl::true_&)
119 {
120 from = -from;
121 To t3(from);
122 To t4 = from.template convert_to<To>();
123 To answer(from.str());
124 To tol = (std::max)(std::numeric_limits<To>::epsilon(), To(std::numeric_limits<From>::epsilon())) * 2;
125 BOOST_CHECK_CLOSE_FRACTION(t3, answer, tol);
126 BOOST_CHECK_CLOSE_FRACTION(t4, answer, tol);
127 }
128 template <class From, class To>
test_convert_neg_float(From const &,const boost::mpl::false_ &)129 void test_convert_neg_float(From const&, const boost::mpl::false_&)
130 {
131 }
132
133 template <class From, class To>
test_convert_imp(boost::mpl::int_<number_kind_floating_point> const &,boost::mpl::int_<number_kind_floating_point> const &)134 void test_convert_imp(boost::mpl::int_<number_kind_floating_point> const&, boost::mpl::int_<number_kind_floating_point> const&)
135 {
136 for (unsigned i = 0; i < 100; ++i)
137 {
138 From from = generate_random<From>();
139 To t1(from);
140 To t2 = from.template convert_to<To>();
141 To answer(from.str());
142 To tol = (std::max)(std::numeric_limits<To>::epsilon(), To(std::numeric_limits<From>::epsilon())) * 2;
143 BOOST_CHECK_CLOSE_FRACTION(t1, answer, tol);
144 BOOST_CHECK_CLOSE_FRACTION(t2, answer, tol);
145 test_convert_neg_float<From, To>(from, boost::mpl::bool_ < std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
146 }
147 }
148
149 template <class From, class To>
test_convert()150 void test_convert()
151 {
152 test_convert_imp<From, To>(typename number_category<From>::type(), typename number_category<To>::type());
153 }
154
main()155 int main()
156 {
157 test_convert<mpfr_float_50, cpp_int>();
158 test_convert<mpfr_float_50, int128_t>();
159 test_convert<mpfr_float_50, uint128_t>();
160
161 test_convert<mpfr_float_50, cpp_rational>();
162
163 test_convert<mpfr_float_50, cpp_dec_float_50>();
164
165 #if defined(HAS_GMP)
166 test_convert<mpfr_float_50, mpz_int>();
167 test_convert<mpfr_float_50, mpq_rational>();
168 test_convert<mpfr_float_50, mpf_float_50>();
169 #endif
170 #if defined(HAS_MPFI)
171 test_convert<mpfr_float_50, mpfi_float_50>();
172 #endif
173 #ifdef HAS_TOMMATH
174 test_convert<mpfr_float_50, tom_int>();
175 test_convert<mpfr_float_50, tom_rational>();
176 #endif
177 #ifdef HAS_FLOAT128
178 test_convert<mpfr_float_50, float128>();
179 #endif
180 return boost::report_errors();
181 }
182
183 #else
184
main()185 int main() { return 0; }
186
187 #endif
188