Added boost header

test/external/boost/date_time/adjust_functors.hpp

@@ -0,0 +1,178 @@
+#ifndef _DATE_TIME_ADJUST_FUNCTORS_HPP___
+#define _DATE_TIME_ADJUST_FUNCTORS_HPP___
+
+/* Copyright (c) 2002,2003 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/date.hpp"
+#include "boost/date_time/wrapping_int.hpp"
+
+namespace boost {
+namespace date_time {
+  
+
+  //! Functor to iterate a fixed number of days
+  template<class date_type>
+  class day_functor 
+  {
+  public:
+    typedef typename date_type::duration_type duration_type;
+    day_functor(int f) : f_(f) {}
+    duration_type get_offset(const date_type& d) const 
+    {
+      // why is 'd' a parameter???
+      // fix compiler warnings
+      d.year();
+      return duration_type(f_);
+    }
+    duration_type get_neg_offset(const date_type& d) const 
+    {
+      // fix compiler warnings
+      d.year();
+      return duration_type(-f_);
+    }
+  private:
+    int f_;
+  };
+
+
+  //! Provides calculation to find next nth month given a date
+  /*! This adjustment function provides the logic for 'month-based'
+   *  advancement on a ymd based calendar.  The policy it uses 
+   *  to handle the non existant end of month days is to back
+   *  up to the last day of the month.  Also, if the starting
+   *  date is the last day of a month, this functor will attempt
+   *  to adjust to the end of the month.
+
+   */
+  template<class date_type>
+  class month_functor 
+  {
+  public:
+    typedef typename date_type::duration_type duration_type;
+    typedef typename date_type::calendar_type cal_type;
+    typedef typename cal_type::ymd_type ymd_type;
+    typedef typename cal_type::day_type day_type;
+
+    month_functor(int f) : f_(f), origDayOfMonth_(0) {}
+    duration_type get_offset(const date_type& d) const 
+    {
+      ymd_type ymd(d.year_month_day());
+      if (origDayOfMonth_ == 0) {
+        origDayOfMonth_ = ymd.day;
+        day_type endOfMonthDay(cal_type::end_of_month_day(ymd.year,ymd.month));
+        if (endOfMonthDay == ymd.day) {
+          origDayOfMonth_ = -1; //force the value to the end of month
+        }
+      }
+      typedef date_time::wrapping_int2<short,1,12> wrap_int2;
+      typedef typename wrap_int2::int_type int_type;
+      wrap_int2 wi(ymd.month);
+      //calc the year wrap around, add() returns 0 or 1 if wrapped
+      int_type year = wi.add(static_cast<int_type>(f_)); 
+      year = static_cast<int_type>(year + ymd.year); //calculate resulting year
+//       std::cout << "trace wi: " << wi.as_int() << std::endl;
+//       std::cout << "trace year: " << year << std::endl;
+      //find the last day for the new month
+      day_type resultingEndOfMonthDay(cal_type::end_of_month_day(year, wi.as_int()));
+      //original was the end of month -- force to last day of month
+      if (origDayOfMonth_ == -1) {
+        return date_type(year, wi.as_int(), resultingEndOfMonthDay) - d;
+      }
+      day_type dayOfMonth = origDayOfMonth_;
+      if (dayOfMonth > resultingEndOfMonthDay) {
+        dayOfMonth = resultingEndOfMonthDay;
+      }
+      return date_type(year, wi.as_int(), dayOfMonth) - d;
+    }
+    //! Returns a negative duration_type
+    duration_type get_neg_offset(const date_type& d) const 
+    {
+      ymd_type ymd(d.year_month_day());
+      if (origDayOfMonth_ == 0) {
+        origDayOfMonth_ = ymd.day;
+        day_type endOfMonthDay(cal_type::end_of_month_day(ymd.year,ymd.month));
+        if (endOfMonthDay == ymd.day) {
+          origDayOfMonth_ = -1; //force the value to the end of month
+        }
+      }
+      typedef date_time::wrapping_int2<short,1,12> wrap_int2;
+      typedef typename wrap_int2::int_type int_type;
+      wrap_int2 wi(ymd.month);
+      //calc the year wrap around, add() returns 0 or 1 if wrapped
+      int_type year = wi.subtract(static_cast<int_type>(f_)); 
+      year = static_cast<int_type>(year + ymd.year); //calculate resulting year
+      //find the last day for the new month
+      day_type resultingEndOfMonthDay(cal_type::end_of_month_day(year, wi.as_int()));
+      //original was the end of month -- force to last day of month
+      if (origDayOfMonth_ == -1) {
+        return date_type(year, wi.as_int(), resultingEndOfMonthDay) - d;
+      }
+      day_type dayOfMonth = origDayOfMonth_;
+      if (dayOfMonth > resultingEndOfMonthDay) {
+        dayOfMonth = resultingEndOfMonthDay;
+      }
+      return date_type(year, wi.as_int(), dayOfMonth) - d;
+    }
+  private:
+    int f_;
+    mutable short origDayOfMonth_;
+  };
+
+
+  //! Functor to iterate a over weeks
+  template<class date_type>
+  class week_functor 
+  {
+  public:
+    typedef typename date_type::duration_type duration_type;
+    typedef typename date_type::calendar_type calendar_type;
+    week_functor(int f) : f_(f) {}
+    duration_type get_offset(const date_type& d) const 
+    {
+      // why is 'd' a parameter???
+      // fix compiler warnings
+      d.year();
+      return duration_type(f_*calendar_type::days_in_week());
+    }
+    duration_type get_neg_offset(const date_type& d) const 
+    {
+      // fix compiler warnings
+      d.year();
+      return duration_type(-f_*calendar_type::days_in_week());
+    }
+  private:
+    int f_;
+  };
+
+  //! Functor to iterate by a year adjusting for leap years
+  template<class date_type>
+  class year_functor 
+  {
+  public:
+    //typedef typename date_type::year_type year_type;
+    typedef typename date_type::duration_type duration_type;
+    year_functor(int f) : _mf(f * 12) {}
+    duration_type get_offset(const date_type& d) const 
+    {
+      return _mf.get_offset(d);
+    }
+    duration_type get_neg_offset(const date_type& d) const 
+    {
+      return _mf.get_neg_offset(d);
+    }
+  private:
+    month_functor<date_type> _mf;
+  };
+
+  
+} }//namespace date_time
+
+
+#endif
+