Added boost header

test/external/boost/date_time/date_clock_device.hpp

@@ -0,0 +1,77 @@
+#ifndef DATE_CLOCK_DEVICE_HPP___
+#define DATE_CLOCK_DEVICE_HPP___
+
+/* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
+ * Use, modification and distribution is subject to the 
+ * Boost Software License, Version 1.0. (See accompanying
+ * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ * Author: Jeff Garland, Bart Garst
+ * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $
+ */
+
+#include "boost/date_time/c_time.hpp"
+
+
+namespace boost {
+namespace date_time {
+
+  //! A clock providing day level services based on C time_t capabilities
+  /*! This clock uses Posix interfaces as its implementation and hence
+   *  uses the timezone settings of the operating system.  Incorrect
+   *  user settings will result in incorrect results for the calls
+   *  to local_day.
+   */
+  template<class date_type> 
+  class day_clock
+  {
+  public:
+    typedef typename date_type::ymd_type ymd_type;
+    //! Get the local day as a date type
+    static date_type local_day() 
+    {
+      return date_type(local_day_ymd());
+    }
+    //! Get the local day as a ymd_type
+    static typename date_type::ymd_type local_day_ymd() 
+    {
+      ::std::tm result;
+      ::std::tm* curr = get_local_time(result);
+      return ymd_type(curr->tm_year + 1900, 
+                      curr->tm_mon + 1, 
+                      curr->tm_mday);
+    }
+    //! Get the current day in universal date as a ymd_type
+    static typename date_type::ymd_type universal_day_ymd() 
+    {
+      ::std::tm result;
+      ::std::tm* curr = get_universal_time(result);
+      return ymd_type(curr->tm_year + 1900, 
+                      curr->tm_mon + 1, 
+                      curr->tm_mday);
+    }
+    //! Get the UTC day as a date type
+    static date_type universal_day() 
+    {
+      return date_type(universal_day_ymd());
+    }
+
+  private:
+    static ::std::tm* get_local_time(std::tm& result) 
+    {
+      ::std::time_t t;
+      ::std::time(&t);
+      return c_time::localtime(&t, &result);
+    }
+    static ::std::tm* get_universal_time(std::tm& result) 
+    {
+      ::std::time_t t;
+      ::std::time(&t);
+      return c_time::gmtime(&t, &result);
+    }
+
+  };
+
+} } //namespace date_time
+
+
+#endif