Added boost header

test/external/boost/numeric/interval/detail/c99sub_rounding_control.hpp

@@ -0,0 +1,43 @@
+/* Boost interval/detail/c99sub_rounding_control.hpp file
+ *
+ * Copyright 2000 Jens Maurer
+ * Copyright 2002 Herv<72> Br<42>nnimann, Guillaume Melquiond, Sylvain Pion
+ *
+ * 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_DETAIL_C99SUB_ROUNDING_CONTROL_HPP
+#define BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUNDING_CONTROL_HPP
+
+#include <boost/detail/fenv.hpp>      // ISO C 99 rounding mode control
+
+namespace boost {
+namespace numeric {
+namespace interval_lib {
+namespace detail {
+
+extern "C" { double rint(double); }
+
+struct c99_rounding_control
+{
+  typedef int rounding_mode;
+
+  static void set_rounding_mode(rounding_mode mode)  { fesetround(mode); }
+  static void get_rounding_mode(rounding_mode &mode) { mode = fegetround(); }
+  static void downward()    { set_rounding_mode(FE_DOWNWARD);   }
+  static void upward()      { set_rounding_mode(FE_UPWARD);     }
+  static void to_nearest()  { set_rounding_mode(FE_TONEAREST);  }
+  static void toward_zero() { set_rounding_mode(FE_TOWARDZERO); }
+
+  template<class T>
+  static T to_int(const T& r) { return rint(r); }
+};
+
+} // namespace detail
+} // namespace interval_lib
+} // namespace numeric
+} // namespace boost
+
+#endif // BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUBDING_CONTROL_HPP