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Copy pathchecked_float.hpp
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170 lines (146 loc) · 4.35 KB
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#ifndef BOOST_NUMERIC_CHECKED_FLOAT_HPP
#define BOOST_NUMERIC_CHECKED_FLOAT_HPP
// Copyright (c) 2017 Robert Ramey
//
// 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)
// contains operation implementation of arithmetic operators
// on built-in floating point types. The default implementation is to just
// invoke the operation with no checking. These are overloaded
// for specific types such as integer, etc.
#include <type_traits> // std::is_floating_point, make_unsigned
namespace boost {
namespace safe_numerics {
namespace checked {
////////////////////////////////////////////////////
// layer 0 - implement safe operations for floating
template<typename R, typename T>
struct heterogeneous_checked_operation<R, T, F,
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
>::type
>{
constexpr static checked_result<R>
cast(const T & t) noexcept {
return t;
};
}; // checked_unary_operation
template<typename R, typename T, typename U>
struct checked_operation<R, T, U, F,
typename std::enable_if<
std::is_floating_point<R>::value
>::type
>{
constexpr static checked_result<R> add(const T & t, const U & u) noexcept {
return t + u;
}
constexpr static checked_result<R> subtract(
const T & t,
const U & u
) noexcept {
return t - u;
}
constexpr static checked_result<R> multiply(
const T & t,
const U & u
) noexcept {
return t * u;
}
constexpr static checked_result<R> divide(
const T & t,
const U & u
) noexcept {
return t / u;
}
constexpr static checked_result<R> modulus(
const T & t,
const U & u
) noexcept {
return t % u;
}
constexpr static bool less_than(const T & t, const U & u) noexcept {
return t < u;
}
constexpr static bool greater_than(const T & t, const U & u) noexcept {
return t > u;
}
constexpr static bool equal(const T & t, const U & u) noexcept {
return t < u;
}
}; // checked_binary_operation
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr bool less_than(const T & t, const U & u) noexcept {
return t < u;
}
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr bool equal(const T & t, const U & u) noexcept {
return t < u;
}
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr checked_result<R> left_shift(const T & t, const U & u) noexcept {
return t << u;
}
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr checked_result<R> right_shift(const T & t, const U & u) noexcept {
return t >> u;
}
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr checked_result<R> bitwise_or(const T & t, const U & u) noexcept {
return t | u;
}
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr checked_result<R> bitwise_xor(const T & t, const U & u) noexcept {
return t ^ u;
}
template<class R, class T, class U>
typename std::enable_if<
std::is_floating_point<R>::value
&& std::is_floating_point<T>::value
&& std::is_floating_point<U>::value,
checked_result<R>
>::type
constexpr checked_result<R> bitwise_and(const T & t, const U & u) noexcept {
return t & u;
}
} // checked
} // safe_numerics
} // boost
#endif // BOOST_NUMERIC_CHECKED_DEFAULT_HPP