Added thirdparty: boost library

thirdparty/include/boost/math/ccmath/div.hpp

@@ -0,0 +1,86 @@
+//  (C) Copyright Matt Borland 2021.
+//  Use, modification and distribution are subject to 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)
+
+#ifndef BOOST_MATH_CCMATH_DIV_HPP
+#define BOOST_MATH_CCMATH_DIV_HPP
+
+#include <cinttypes>
+#include <cstdint>
+#include <boost/math/ccmath/detail/config.hpp>
+
+#ifdef BOOST_MATH_NO_CCMATH
+#error "The header <boost/math/div.hpp> can only be used in C++17 and later."
+#endif
+
+namespace boost::math::ccmath {
+
+namespace detail {
+
+template <typename ReturnType, typename Z>
+inline constexpr ReturnType div_impl(const Z x, const Z y) noexcept
+{
+    // std::div_t/ldiv_t/lldiv_t/imaxdiv_t can be defined as either { Z quot; Z rem; }; or { Z rem; Z quot; };
+    // so don't use braced initialization to guarantee compatibility
+    ReturnType ans {0, 0};
+
+    ans.quot = x / y;
+    ans.rem = x % y;
+
+    return ans;
+}
+
+} // Namespace detail
+
+// Used for types other than built-ins (e.g. boost multiprecision)
+template <typename Z>
+struct div_t
+{
+    Z quot;
+    Z rem;
+};
+
+template <typename Z>
+inline constexpr auto div(Z x, Z y) noexcept
+{
+    if constexpr (std::is_same_v<Z, int>)
+    {
+        return detail::div_impl<std::div_t>(x, y);
+    }
+    else if constexpr (std::is_same_v<Z, long>)
+    {
+        return detail::div_impl<std::ldiv_t>(x, y);
+    }
+    else if constexpr (std::is_same_v<Z, long long>)
+    {
+        return detail::div_impl<std::lldiv_t>(x, y);
+    }
+    else if constexpr (std::is_same_v<Z, std::intmax_t>)
+    {
+        return detail::div_impl<std::imaxdiv_t>(x, y);
+    }
+    else
+    {
+        return detail::div_impl<boost::math::ccmath::div_t<Z>>(x, y);
+    }
+}
+
+inline constexpr std::ldiv_t ldiv(long x, long y) noexcept
+{
+    return detail::div_impl<std::ldiv_t>(x, y);
+}
+
+inline constexpr std::lldiv_t lldiv(long long x, long long y) noexcept
+{
+    return detail::div_impl<std::lldiv_t>(x, y);
+}
+
+inline constexpr std::imaxdiv_t imaxdiv(std::intmax_t x, std::intmax_t y) noexcept
+{
+    return detail::div_impl<std::imaxdiv_t>(x, y);
+}
+
+} // Namespaces
+
+#endif // BOOST_MATH_CCMATH_DIV_HPP