Added boost header

test/external/boost/numeric/interval/arith3.hpp

@@ -0,0 +1,69 @@
+/* Boost interval/arith3.hpp template implementation file
+ *
+ * This headers provides arithmetical functions
+ * which compute an interval given some base
+ * numbers. The resulting interval encloses the
+ * real result of the arithmetic operation.
+ *
+ * Copyright 2003 Guillaume Melquiond
+ *
+ * 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)
+ */
+
+#ifndef BOOST_NUMERIC_INTERVAL_ARITH3_HPP
+#define BOOST_NUMERIC_INTERVAL_ARITH3_HPP
+
+#include <boost/numeric/interval/detail/interval_prototype.hpp>
+#include <boost/numeric/interval/detail/test_input.hpp>
+
+namespace boost {
+namespace numeric {
+namespace interval_lib {
+
+template<class I> inline
+I add(const typename I::base_type& x, const typename I::base_type& y)
+{
+  typedef typename I::traits_type Policies;
+  if (detail::test_input<typename I::base_type, Policies>(x, y))
+    return I::empty();
+  typename Policies::rounding rnd;
+  return I(rnd.add_down(x, y), rnd.add_up(x, y), true);
+}
+
+template<class I> inline
+I sub(const typename I::base_type& x, const typename I::base_type& y)
+{
+  typedef typename I::traits_type Policies;
+  if (detail::test_input<typename I::base_type, Policies>(x, y))
+    return I::empty();
+  typename Policies::rounding rnd;
+  return I(rnd.sub_down(x, y), rnd.sub_up(x, y), true);
+}
+
+template<class I> inline
+I mul(const typename I::base_type& x, const typename I::base_type& y)
+{
+  typedef typename I::traits_type Policies;
+  if (detail::test_input<typename I::base_type, Policies>(x, y))
+    return I::empty();
+  typename Policies::rounding rnd;
+  return I(rnd.mul_down(x, y), rnd.mul_up(x, y), true);
+}
+
+template<class I> inline
+I div(const typename I::base_type& x, const typename I::base_type& y)
+{
+  typedef typename I::traits_type Policies;
+  if (detail::test_input<typename I::base_type, Policies>(x, y) || user::is_zero(y))
+    return I::empty();
+  typename Policies::rounding rnd;
+  return I(rnd.div_down(x, y), rnd.div_up(x, y), true);
+}
+
+} // namespace interval_lib
+} // namespace numeric
+} // namespace boost
+
+#endif // BOOST_NUMERIC_INTERVAL_ARITH3_HPP