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
6 #ifndef BOOST_MATH_CONCEPTS_ER_HPP
7 #define BOOST_MATH_CONCEPTS_ER_HPP
13 #include <boost/cstdint.hpp>
14 #include <boost/multiprecision/number.hpp>
15 #include <boost/math/special_functions/fpclassify.hpp>
16 #include <boost/mpl/list.hpp>
17 #include <boost/container_hash/hash.hpp>
20 namespace multiprecision {
25 #pragma warning(disable : 4244)
28 struct number_backend_float_architype
30 typedef mpl::list<boost::long_long_type> signed_types;
31 typedef mpl::list<boost::ulong_long_type> unsigned_types;
32 typedef mpl::list<long double> float_types;
33 typedef int exponent_type;
35 number_backend_float_architype()
38 std::cout << "Default construct" << std::endl;
40 number_backend_float_architype(const number_backend_float_architype& o)
42 std::cout << "Copy construct" << std::endl;
45 number_backend_float_architype& operator=(const number_backend_float_architype& o)
48 std::cout << "Assignment (" << m_value << ")" << std::endl;
51 number_backend_float_architype& operator=(boost::ulong_long_type i)
54 std::cout << "UInt Assignment (" << i << ")" << std::endl;
57 number_backend_float_architype& operator=(boost::long_long_type i)
60 std::cout << "Int Assignment (" << i << ")" << std::endl;
63 number_backend_float_architype& operator=(long double d)
66 std::cout << "long double Assignment (" << d << ")" << std::endl;
69 number_backend_float_architype& operator=(const char* s)
71 #ifndef BOOST_NO_EXCEPTIONS
75 m_value = boost::lexical_cast<long double>(s);
76 #ifndef BOOST_NO_EXCEPTIONS
78 catch (const std::exception&)
80 BOOST_THROW_EXCEPTION(std::runtime_error(std::string("Unable to parse input string: \"") + s + std::string("\" as a valid floating point number.")));
83 std::cout << "const char* Assignment (" << s << ")" << std::endl;
86 void swap(number_backend_float_architype& o)
88 std::cout << "Swapping (" << m_value << " with " << o.m_value << ")" << std::endl;
89 std::swap(m_value, o.m_value);
91 std::string str(std::streamsize digits, std::ios_base::fmtflags f) const
98 ss.precision(std::numeric_limits<long double>::digits10 + 3);
99 boost::intmax_t i = m_value;
100 boost::uintmax_t u = m_value;
101 if (!(f & std::ios_base::scientific) && m_value == i)
103 else if (!(f & std::ios_base::scientific) && m_value == u)
107 std::string s = ss.str();
108 std::cout << "Converting to string (" << s << ")" << std::endl;
113 std::cout << "Negating (" << m_value << ")" << std::endl;
116 int compare(const number_backend_float_architype& o) const
118 std::cout << "Comparison" << std::endl;
119 return m_value > o.m_value ? 1 : (m_value < o.m_value ? -1 : 0);
121 int compare(boost::long_long_type i) const
123 std::cout << "Comparison with int" << std::endl;
124 return m_value > i ? 1 : (m_value < i ? -1 : 0);
126 int compare(boost::ulong_long_type i) const
128 std::cout << "Comparison with unsigned" << std::endl;
129 return m_value > i ? 1 : (m_value < i ? -1 : 0);
131 int compare(long double d) const
133 std::cout << "Comparison with long double" << std::endl;
134 return m_value > d ? 1 : (m_value < d ? -1 : 0);
139 inline void eval_add(number_backend_float_architype& result, const number_backend_float_architype& o)
141 std::cout << "Addition (" << result.m_value << " += " << o.m_value << ")" << std::endl;
142 result.m_value += o.m_value;
144 inline void eval_subtract(number_backend_float_architype& result, const number_backend_float_architype& o)
146 std::cout << "Subtraction (" << result.m_value << " -= " << o.m_value << ")" << std::endl;
147 result.m_value -= o.m_value;
149 inline void eval_multiply(number_backend_float_architype& result, const number_backend_float_architype& o)
151 std::cout << "Multiplication (" << result.m_value << " *= " << o.m_value << ")" << std::endl;
152 result.m_value *= o.m_value;
154 inline void eval_divide(number_backend_float_architype& result, const number_backend_float_architype& o)
156 std::cout << "Division (" << result.m_value << " /= " << o.m_value << ")" << std::endl;
157 result.m_value /= o.m_value;
160 inline void eval_convert_to(boost::ulong_long_type* result, const number_backend_float_architype& val)
162 *result = static_cast<boost::ulong_long_type>(val.m_value);
164 inline void eval_convert_to(boost::long_long_type* result, const number_backend_float_architype& val)
166 *result = static_cast<boost::long_long_type>(val.m_value);
168 inline void eval_convert_to(long double* result, number_backend_float_architype& val)
170 *result = val.m_value;
173 inline void eval_frexp(number_backend_float_architype& result, const number_backend_float_architype& arg, int* exp)
175 result = std::frexp(arg.m_value, exp);
178 inline void eval_ldexp(number_backend_float_architype& result, const number_backend_float_architype& arg, int exp)
180 result = std::ldexp(arg.m_value, exp);
183 inline void eval_floor(number_backend_float_architype& result, const number_backend_float_architype& arg)
185 result = std::floor(arg.m_value);
188 inline void eval_ceil(number_backend_float_architype& result, const number_backend_float_architype& arg)
190 result = std::ceil(arg.m_value);
193 inline void eval_sqrt(number_backend_float_architype& result, const number_backend_float_architype& arg)
195 result = std::sqrt(arg.m_value);
198 inline int eval_fpclassify(const number_backend_float_architype& arg)
200 return (boost::math::fpclassify)(arg.m_value);
203 inline std::size_t hash_value(const number_backend_float_architype& v)
205 boost::hash<long double> hasher;
206 return hasher(v.m_value);
209 typedef boost::multiprecision::number<number_backend_float_architype> mp_number_float_architype;
211 } // namespace concepts
214 struct number_category<concepts::number_backend_float_architype> : public mpl::int_<number_kind_floating_point>
217 }} // namespace boost::multiprecision
221 template <boost::multiprecision::expression_template_option ExpressionTemplates>
222 class numeric_limits<boost::multiprecision::number<boost::multiprecision::concepts::number_backend_float_architype, ExpressionTemplates> > : public std::numeric_limits<long double>
224 typedef std::numeric_limits<long double> base_type;
225 typedef boost::multiprecision::number<boost::multiprecision::concepts::number_backend_float_architype, ExpressionTemplates> number_type;
228 static number_type(min)() BOOST_NOEXCEPT { return (base_type::min)(); }
229 static number_type(max)() BOOST_NOEXCEPT { return (base_type::max)(); }
230 static number_type lowest() BOOST_NOEXCEPT { return -(max)(); }
231 static number_type epsilon() BOOST_NOEXCEPT { return base_type::epsilon(); }
232 static number_type round_error() BOOST_NOEXCEPT { return base_type::round_error(); }
233 static number_type infinity() BOOST_NOEXCEPT { return base_type::infinity(); }
234 static number_type quiet_NaN() BOOST_NOEXCEPT { return base_type::quiet_NaN(); }
235 static number_type signaling_NaN() BOOST_NOEXCEPT { return base_type::signaling_NaN(); }
236 static number_type denorm_min() BOOST_NOEXCEPT { return base_type::denorm_min(); }