1 // Copyright John Maddock 2011.
2
3 // Use, modification and distribution are subject to the
4 // Boost Software License, Version 1.0.
5 // (See accompanying file LICENSE_1_0.txt
6 // or copy at http://www.boost.org/LICENSE_1_0.txt)
7
8 #ifdef _MSC_VER
9 # define _SCL_SECURE_NO_WARNINGS
10 #endif
11
12 #if !defined(TEST_MPQ) && !defined(TEST_TOMMATH) && !defined(TEST_CPP_INT)
13 # define TEST_MPQ
14 # define TEST_TOMMATH
15 # define TEST_CPP_INT
16
17 #ifdef _MSC_VER
18 #pragma message("CAUTION!!: No backend type specified so testing everything.... this will take some time!!")
19 #endif
20 #ifdef __GNUC__
21 #pragma warning "CAUTION!!: No backend type specified so testing everything.... this will take some time!!"
22 #endif
23
24 #endif
25
26 #if defined(TEST_MPQ)
27 #include <boost/multiprecision/gmp.hpp>
28 #endif
29 #if defined(TEST_TOMMATH)
30 #include <boost/multiprecision/tommath.hpp>
31 #endif
32 #ifdef TEST_CPP_INT
33 #include <boost/multiprecision/cpp_int.hpp>
34 #endif
35
36 #include <boost/algorithm/string/case_conv.hpp>
37 #include <boost/random/mersenne_twister.hpp>
38 #include <boost/random/uniform_int.hpp>
39 #include <boost/multiprecision/rational_adaptor.hpp>
40 #include "test.hpp"
41 #include <iostream>
42 #include <iomanip>
43
44 template <class T>
generate_random()45 T generate_random()
46 {
47 typedef typename boost::multiprecision::component_type<T>::type int_type;
48 static boost::random::uniform_int_distribution<unsigned> ui(0, 20);
49 static boost::random::mt19937 gen;
50 int_type val = int_type(gen());
51 unsigned lim = ui(gen);
52 for(unsigned i = 0; i < lim; ++i)
53 {
54 val *= (gen.max)();
55 val += gen();
56 }
57 int_type denom = int_type(gen());
58 lim = ui(gen);
59 for(unsigned i = 0; i < lim; ++i)
60 {
61 denom *= (gen.max)();
62 denom += gen();
63 }
64 return T(val, denom);
65 }
66
67 template <class T>
do_round_trip(const T & val,std::ios_base::fmtflags f,const boost::mpl::true_ &)68 void do_round_trip(const T& val, std::ios_base::fmtflags f, const boost::mpl::true_&)
69 {
70 std::stringstream ss;
71 #ifndef BOOST_NO_CXX11_NUMERIC_LIMITS
72 ss << std::setprecision(std::numeric_limits<T>::max_digits10);
73 #else
74 ss << std::setprecision(std::numeric_limits<T>::digits10 + 5);
75 #endif
76 ss.flags(f);
77 ss << val;
78 T new_val = static_cast<T>(ss.str());
79 BOOST_CHECK_EQUAL(new_val, val);
80 new_val = static_cast<T>(val.str(0, f));
81 BOOST_CHECK_EQUAL(new_val, val);
82 }
83
84 template <class T>
do_round_trip(const T & val,std::ios_base::fmtflags f,const boost::mpl::false_ &)85 void do_round_trip(const T& val, std::ios_base::fmtflags f, const boost::mpl::false_&)
86 {
87 std::stringstream ss;
88 ss << std::setprecision(std::numeric_limits<T>::digits10 + 4);
89 ss.flags(f);
90 ss << val;
91 T new_val;
92 ss >> new_val;
93 BOOST_CHECK_EQUAL(new_val, val);
94 }
95
96 template <class T>
97 struct is_number : public boost::mpl::false_{};
98 template <class T>
99 struct is_number<boost::multiprecision::number<T> > : public boost::mpl::true_{};
100
101 template <class T>
do_round_trip(const T & val,std::ios_base::fmtflags f)102 void do_round_trip(const T& val, std::ios_base::fmtflags f)
103 {
104 do_round_trip(val, f, is_number<T>());
105 }
106
107 template <class T>
do_round_trip(const T & val)108 void do_round_trip(const T& val)
109 {
110 do_round_trip(val, std::ios_base::fmtflags(0));
111 if(val >= 0)
112 {
113 do_round_trip(val, std::ios_base::fmtflags(std::ios_base::showbase|std::ios_base::hex));
114 do_round_trip(val, std::ios_base::fmtflags(std::ios_base::showbase|std::ios_base::oct));
115 }
116 }
117
118 template <class T>
test_round_trip()119 void test_round_trip()
120 {
121 for(unsigned i = 0; i < 1000; ++i)
122 {
123 T val = generate_random<T>();
124 do_round_trip(val);
125 do_round_trip(T(-val));
126 }
127 }
128
main()129 int main()
130 {
131 #ifdef TEST_MPQ
132 test_round_trip<boost::multiprecision::mpq_rational>();
133 test_round_trip<boost::rational<boost::multiprecision::mpz_int> >();
134 test_round_trip<boost::multiprecision::number<boost::multiprecision::rational_adaptor<boost::multiprecision::gmp_int> > >();
135 #endif
136 #ifdef TEST_TOMMATH
137 test_round_trip<boost::rational<boost::multiprecision::tom_int> >();
138 test_round_trip<boost::multiprecision::tom_rational >();
139 #endif
140 #ifdef TEST_CPP_INT
141 test_round_trip<boost::rational<boost::multiprecision::cpp_int> >();
142 test_round_trip<boost::multiprecision::cpp_rational >();
143 #endif
144 return boost::report_errors();
145 }
146
147