comparison DEPENDENCIES/generic/include/boost/math/special_functions/trunc.hpp @ 16:2665513ce2d3

Add boost headers

+//  Copyright John Maddock 2007.
+//  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_TRUNC_HPP
+#define BOOST_MATH_TRUNC_HPP
+
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+#include <boost/math/tools/config.hpp>
+#include <boost/math/policies/error_handling.hpp>
+#include <boost/math/special_functions/fpclassify.hpp>
+
+namespace boost{ namespace math{
+
+template <class T, class Policy>
+inline typename tools::promote_args<T>::type trunc(const T& v, const Policy& pol)
+{
+   BOOST_MATH_STD_USING
+   typedef typename tools::promote_args<T>::type result_type;
+   if(!(boost::math::isfinite)(v))
+      return policies::raise_rounding_error("boost::math::trunc<%1%>(%1%)", 0, static_cast<result_type>(v), static_cast<result_type>(v), pol);
+   return (v >= 0) ? static_cast<result_type>(floor(v)) : static_cast<result_type>(ceil(v));
+}
+template <class T>
+inline typename tools::promote_args<T>::type trunc(const T& v)
+{
+   return trunc(v, policies::policy<>());
+}
+//
+// The following functions will not compile unless T has an
+// implicit convertion to the integer types.  For user-defined
+// number types this will likely not be the case.  In that case
+// these functions should either be specialized for the UDT in
+// question, or else overloads should be placed in the same 
+// namespace as the UDT: these will then be found via argument
+// dependent lookup.  See our concept archetypes for examples.
+//
+template <class T, class Policy>
+inline int itrunc(const T& v, const Policy& pol)
+{
+   BOOST_MATH_STD_USING
+   typedef typename tools::promote_args<T>::type result_type;
+   result_type r = boost::math::trunc(v, pol);
+   if((r > (std::numeric_limits<int>::max)()) || (r < (std::numeric_limits<int>::min)()))
+      return static_cast<int>(policies::raise_rounding_error("boost::math::itrunc<%1%>(%1%)", 0, static_cast<result_type>(v), 0, pol));
+   return static_cast<int>(r);
+}
+template <class T>
+inline int itrunc(const T& v)
+{
+   return itrunc(v, policies::policy<>());
+}
+
+template <class T, class Policy>
+inline long ltrunc(const T& v, const Policy& pol)
+{
+   BOOST_MATH_STD_USING
+   typedef typename tools::promote_args<T>::type result_type;
+   result_type r = boost::math::trunc(v, pol);
+   if((r > (std::numeric_limits<long>::max)()) || (r < (std::numeric_limits<long>::min)()))
+      return static_cast<long>(policies::raise_rounding_error("boost::math::ltrunc<%1%>(%1%)", 0, static_cast<result_type>(v), 0L, pol));
+   return static_cast<long>(r);
+}
+template <class T>
+inline long ltrunc(const T& v)
+{
+   return ltrunc(v, policies::policy<>());
+}
+
+#ifdef BOOST_HAS_LONG_LONG
+
+template <class T, class Policy>
+inline boost::long_long_type lltrunc(const T& v, const Policy& pol)
+{
+   BOOST_MATH_STD_USING
+   typedef typename tools::promote_args<T>::type result_type;
+   result_type r = boost::math::trunc(v, pol);
+   if((r > (std::numeric_limits<boost::long_long_type>::max)()) || (r < (std::numeric_limits<boost::long_long_type>::min)()))
+      return static_cast<boost::long_long_type>(policies::raise_rounding_error("boost::math::lltrunc<%1%>(%1%)", 0, v, static_cast<boost::long_long_type>(0), pol));
+   return static_cast<boost::long_long_type>(r);
+}
+template <class T>
+inline boost::long_long_type lltrunc(const T& v)
+{
+   return lltrunc(v, policies::policy<>());
+}
+
+#endif
+
+}} // namespaces
+
+#endif // BOOST_MATH_TRUNC_HPP