[Boost-commit] svn:boost r74208 - trunk/boost/chrono

Subject: [Boost-commit] svn:boost r74208 - trunk/boost/chrono
From: vicente.botet_at_[hidden]
Date: 2011-09-03 11:45:52

Author: viboes
Date: 2011-09-03 11:45:51 EDT (Sat, 03 Sep 2011)
New Revision: 74208
URL: http://svn.boost.org/trac/boost/changeset/74208

Log:
Chrono: Added rounding utilities
Added:
   trunk/boost/chrono/ceil.hpp   (contents, props changed)
   trunk/boost/chrono/floor.hpp   (contents, props changed)
   trunk/boost/chrono/round.hpp   (contents, props changed)

Added: trunk/boost/chrono/ceil.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/chrono/ceil.hpp	2011-09-03 11:45:51 EDT (Sat, 03 Sep 2011)
@@ -0,0 +1,36 @@
+//  boost/chrono/round.hpp  ------------------------------------------------------------//
+
+//  (C) Copyright Howard Hinnant
+//  Copyright 2011 Vicente J. Botet Escriba
+
+//  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)
+
+//  See http://www.boost.org/libs/chrono for documentation.
+
+#ifndef BOOST_CHRONO_CEIL_HPP
+#define BOOST_CHRONO_CEIL_HPP
+
+#include <boost/chrono/duration.hpp>
+
+namespace boost
+{
+  namespace chrono
+  {
+
+    /**
+     * round up
+     */
+    template <class To, class Rep, class Period>
+    To ceil(const duration<Rep, Period>& d)
+    {
+        To t = duration_cast<To>(d);
+        if (t < d)
+            ++t;
+        return t;
+    }
+
+  } // namespace chrono
+} // namespace boost
+
+#endif

Added: trunk/boost/chrono/floor.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/chrono/floor.hpp	2011-09-03 11:45:51 EDT (Sat, 03 Sep 2011)
@@ -0,0 +1,34 @@
+//  boost/chrono/round.hpp  ------------------------------------------------------------//
+
+//  (C) Copyright Howard Hinnant
+//  Copyright 2011 Vicente J. Botet Escriba
+
+//  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)
+
+//  See http://www.boost.org/libs/chrono for documentation.
+
+#ifndef BOOST_CHRONO_FLOOR_HPP
+#define BOOST_CHRONO_FLOOR_HPP
+
+#include <boost/chrono/duration.hpp>
+
+namespace boost
+{
+  namespace chrono
+  {
+
+    /**
+     * round down
+     */
+    template <class To, class Rep, class Period>
+    To floor(const duration<Rep, Period>& d)
+    {
+        return duration_cast<To>(d);
+    }
+
+
+  } // namespace chrono
+} // namespace boost
+
+#endif

Added: trunk/boost/chrono/round.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/chrono/round.hpp	2011-09-03 11:45:51 EDT (Sat, 03 Sep 2011)
@@ -0,0 +1,47 @@
+//  boost/chrono/round.hpp  ------------------------------------------------------------//
+
+//  (C) Copyright Howard Hinnant
+//  Copyright 2011 Vicente J. Botet Escriba
+
+//  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)
+
+//  See http://www.boost.org/libs/chrono for documentation.
+
+#ifndef BOOST_CHRONO_ROUND_HPP
+#define BOOST_CHRONO_ROUND_HPP
+
+#include <boost/chrono/duration.hpp>
+#include <boost/chrono/typeof/boost/chrono/chrono.hpp>
+
+namespace boost
+{
+  namespace chrono
+  {
+
+    /**
+     * round to nearest, to even on tie
+     */
+    template <class To, class Rep, class Period>
+    To round(const duration<Rep, Period>& d)
+    {
+        To t0 = duration_cast<To>(d);
+        To t1 = t0;
+        ++t1;
+        BOOST_AUTO(diff0, d - t0);
+        BOOST_AUTO(diff1, t1 - d);
+        if (diff0 == diff1)
+        {
+            if (t0.count() & 1)
+                return t1;
+            return t0;
+        }
+        else if (diff0 < diff1)
+            return t0;
+        return t1;
+    }
+
+  } // namespace chrono
+} // namespace boost
+
+#endif