Added thirdparty: boost library

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

@@ -0,0 +1,114 @@
+//  (C) Copyright Matt Borland 2021 - 2022.
+//  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_FMOD_HPP
+#define BOOST_MATH_CCMATH_FMOD_HPP
+
+#include <boost/math/ccmath/detail/config.hpp>
+
+#ifdef BOOST_MATH_NO_CCMATH
+#error "The header <boost/math/fmod.hpp> can only be used in C++17 and later."
+#endif
+
+#include <cstdint>
+#include <boost/math/tools/promotion.hpp>
+#include <boost/math/ccmath/abs.hpp>
+#include <boost/math/ccmath/isinf.hpp>
+#include <boost/math/ccmath/isnan.hpp>
+#include <boost/math/ccmath/isfinite.hpp>
+
+namespace boost::math::ccmath {
+
+namespace detail {
+
+template <typename T>
+constexpr T fmod_impl(T x, T y)
+{
+    if (x == y)
+    {
+        return static_cast<T>(0);
+    }
+    else
+    {
+        while (x >= y)
+        {
+            x -= y;
+        }
+
+        return static_cast<T>(x);
+    }
+}
+
+} // Namespace detail
+
+template <typename Real, std::enable_if_t<!std::is_integral_v<Real>, bool> = true>
+constexpr Real fmod(Real x, Real y)
+{
+    if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
+    {
+        if (boost::math::ccmath::abs(x) == static_cast<Real>(0) && y != static_cast<Real>(0))
+        {
+            return x;
+        }
+        else if (boost::math::ccmath::isinf(x) && !boost::math::ccmath::isnan(y))
+        {
+            return std::numeric_limits<Real>::quiet_NaN();
+        }
+        else if (boost::math::ccmath::abs(y) == static_cast<Real>(0) && !boost::math::ccmath::isnan(x))
+        {
+            return std::numeric_limits<Real>::quiet_NaN();
+        }
+        else if (boost::math::ccmath::isinf(y) && boost::math::ccmath::isfinite(x))
+        {
+            return x;
+        }
+        else if (boost::math::ccmath::isnan(x))
+        {
+            return x;
+        }
+        else if (boost::math::ccmath::isnan(y))
+        {
+            return y;
+        }
+
+        return boost::math::ccmath::detail::fmod_impl<Real>(x, y);
+    }
+    else
+    {
+        using std::fmod;
+        return fmod(x, y);
+    }
+}
+
+template <typename T1, typename T2>
+constexpr auto fmod(T1 x, T2 y)
+{
+    if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
+    {
+        using promoted_type = boost::math::tools::promote_args_t<T1, T2>;
+        return boost::math::ccmath::fmod(promoted_type(x), promoted_type(y));
+    }
+    else
+    {
+        using std::fmod;
+        return fmod(x, y);
+    }
+}
+
+constexpr float fmodf(float x, float y)
+{
+    return boost::math::ccmath::fmod(x, y);
+}
+
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+constexpr long double fmodl(long double x, long double y)
+{
+    return boost::math::ccmath::fmod(x, y);
+}
+#endif
+
+} // Namespaces
+
+#endif // BOOST_MATH_CCMATH_FMOD_HPP