FM / date

/usr/include/boost/date_time

Name	Size	Mode	Actions
gregorian/	-	0755	rm
local_time/	-	0755	rm
posix_time/	-	0755	rm
adjust_functors.hpp	5467	0644	edit dl rm
compiler_config.hpp	5640	0644	edit dl rm
constrained_value.hpp	4224	0644	edit dl rm
c_local_time_adjustor.hpp	2631	0644	edit dl rm
c_time.hpp	4496	0644	edit dl rm
date.hpp	7357	0644	edit dl rm
date_clock_device.hpp	2299	0644	edit dl rm
date_defs.hpp	701	0644	edit dl rm
date_duration.hpp	4669	0644	edit dl rm
date_duration_types.hpp	9186	0644	edit dl rm
date_facet.hpp	29314	0644	edit dl rm
date_formatting.hpp	4208	0644	edit dl rm
date_formatting_limited.hpp	3461	0644	edit dl rm
date_formatting_locales.hpp	6748	0644	edit dl rm
date_format_simple.hpp	3128	0644	edit dl rm
date_generators.hpp	16508	0644	edit dl rm
date_generator_formatter.hpp	11715	0644	edit dl rm
date_generator_parser.hpp	13064	0644	edit dl rm
date_iterator.hpp	3305	0644	edit dl rm
date_names_put.hpp	10754	0644	edit dl rm
date_parsing.hpp	14146	0644	edit dl rm
dst_rules.hpp	15401	0644	edit dl rm
dst_transition_generators.hpp	2293	0644	edit dl rm
filetime_functions.hpp	3163	0644	edit dl rm
find_match.hpp	1355	0644	edit dl rm
format_date_parser.hpp	23909	0644	edit dl rm
gregorian_calendar.hpp	2714	0644	edit dl rm
gregorian_calendar.ipp	7947	0644	edit dl rm
int_adapter.hpp	14463	0644	edit dl rm
iso_format.hpp	5640	0644	edit dl rm
locale_config.hpp	1206	0644	edit dl rm
local_timezone_defs.hpp	7618	0644	edit dl rm
local_time_adjustor.hpp	8578	0644	edit dl rm
microsec_time_clock.hpp	6257	0644	edit dl rm
parse_format_base.hpp	961	0644	edit dl rm
period.hpp	11936	0644	edit dl rm
period_formatter.hpp	7237	0644	edit dl rm
period_parser.hpp	7932	0644	edit dl rm
special_defs.hpp	633	0644	edit dl rm
special_values_formatter.hpp	3657	0644	edit dl rm
special_values_parser.hpp	6161	0644	edit dl rm
strings_from_facet.hpp	4505	0644	edit dl rm
string_convert.hpp	1002	0644	edit dl rm
string_parse_tree.hpp	8405	0644	edit dl rm
time.hpp	6788	0644	edit dl rm
time_clock.hpp	2245	0644	edit dl rm
time_defs.hpp	942	0644	edit dl rm
time_duration.hpp	10569	0644	edit dl rm
time_facet.hpp	58988	0644	edit dl rm
time_formatting_streams.hpp	3752	0644	edit dl rm
time_iterator.hpp	1438	0644	edit dl rm
time_parsing.hpp	11846	0644	edit dl rm
time_resolution_traits.hpp	6760	0644	edit dl rm
time_system_counted.hpp	9051	0644	edit dl rm
time_system_split.hpp	8077	0644	edit dl rm
time_zone_base.hpp	3711	0644	edit dl rm
time_zone_names.hpp	3103	0644	edit dl rm
tz_db_base.hpp	15915	0644	edit dl rm
wrapping_int.hpp	5824	0644	edit dl rm
year_month_day.hpp	1375	0644	edit dl rm

Edit: /usr/include/boost/date_time/adjust_functors.hpp (5467B)

#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
 * $Date$
 */

#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&) const
    {
      return duration_type(f_);
    }
    duration_type get_neg_offset(const date_type&) const
    {
      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;
      wrap_int2 wi(ymd.month);
      //calc the year wrap around, add() returns 0 or 1 if wrapped
      const typename ymd_type::year_type year(static_cast<typename ymd_type::year_type::value_type>(ymd.year + wi.add(f_)));
//       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;
      wrap_int2 wi(ymd.month);
      //calc the year wrap around, add() returns 0 or 1 if wrapped
      const typename ymd_type::year_type year(static_cast<typename ymd_type::year_type::value_type>(ymd.year + wi.subtract(f_)));
      //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&) const
    {
      return duration_type(f_*static_cast<int>(calendar_type::days_in_week()));
    }
    duration_type get_neg_offset(const date_type&) const
    {
      return duration_type(-f_*static_cast<int>(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

cmd: