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/wrapping_int.hpp (5824B)

#ifndef _DATE_TIME_WRAPPING_INT_HPP__
#define _DATE_TIME_WRAPPING_INT_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
 * $Date$
 */

#include "boost/config.hpp"

namespace boost {
namespace date_time {

//! A wrapping integer used to support time durations (WARNING: only instantiate with a signed type)
/*! In composite date and time types this type is used to
 *  wrap at the day boundary.
 *  Ex:
 *  A wrapping_int<short, 10> will roll over after nine, and
 *  roll under below zero. This gives a range of [0,9]
 *
 * NOTE: it is strongly recommended that wrapping_int2 be used
 * instead of wrapping_int as wrapping_int is to be depricated
 * at some point soon.
 *
 * Also Note that warnings will occur if instantiated with an
 * unsigned type. Only a signed type should be used!
 */
template<typename int_type_, int_type_ wrap_val>
class wrapping_int {
public:
  typedef int_type_ int_type;
  //typedef overflow_type_ overflow_type;
  static BOOST_CONSTEXPR int_type wrap_value() {return wrap_val;}
  //!Add, return true if wrapped
  BOOST_CXX14_CONSTEXPR wrapping_int(int_type v) : value_(v) {}
  //! Explicit converion method
  BOOST_CONSTEXPR int_type as_int()   const   {return value_;}
  BOOST_CONSTEXPR operator int_type() const   {return value_;}
  //!Add, return number of wraps performed
  /*! The sign of the returned value will indicate which direction the
   * wraps went. Ex: add a negative number and wrapping under could occur,
   * this would be indicated by a negative return value. If wrapping over
   * took place, a positive value would be returned */
  template< typename IntT >
  BOOST_CXX14_CONSTEXPR IntT add(IntT v)
  {
    int_type remainder = static_cast<int_type>(v % (wrap_val));
    IntT overflow = static_cast<IntT>(v / (wrap_val));
    value_ = static_cast<int_type>(value_ + remainder);
    return calculate_wrap(overflow);
  }
  //! Subtract will return '+d' if wrapping under took place ('d' is the number of wraps)
  /*! The sign of the returned value will indicate which direction the
   * wraps went (positive indicates wrap under, negative indicates wrap over).
   * Ex: subtract a negative number and wrapping over could
   * occur, this would be indicated by a negative return value. If
   * wrapping under took place, a positive value would be returned. */
  template< typename IntT >
  BOOST_CXX14_CONSTEXPR IntT subtract(IntT v)
  {
    int_type remainder = static_cast<int_type>(v % (wrap_val));
    IntT underflow = static_cast<IntT>(-(v / (wrap_val)));
    value_ = static_cast<int_type>(value_ - remainder);
    return calculate_wrap(underflow) * -1;
  }
private:
  int_type value_;

template< typename IntT >
  BOOST_CXX14_CONSTEXPR IntT calculate_wrap(IntT wrap)
  {
    if ((value_) >= wrap_val)
    {
      ++wrap;
      value_ -= (wrap_val);
    }
    else if(value_ < 0)
    {
      --wrap;
      value_ += (wrap_val);
    }
    return wrap;
  }

};

//! A wrapping integer used to wrap around at the top (WARNING: only instantiate with a signed type)
/*! Bad name, quick impl to fix a bug -- fix later!!
 *  This allows the wrap to restart at a value other than 0.
 */
template<typename int_type_, int_type_ wrap_min, int_type_ wrap_max>
class wrapping_int2 {
public:
  typedef int_type_ int_type;
  static BOOST_CONSTEXPR int_type wrap_value() {return wrap_max;}
  static BOOST_CONSTEXPR int_type min_value()  {return wrap_min;}
  /*! If initializing value is out of range of [wrap_min, wrap_max],
   * value will be initialized to closest of min or max */
  BOOST_CXX14_CONSTEXPR wrapping_int2(int_type v) : value_(v) {
    if(value_ < wrap_min)
    {
      value_ = wrap_min;
    }
    if(value_ > wrap_max)
    {
      value_ = wrap_max;
    }
  }
  //! Explicit converion method
  BOOST_CONSTEXPR int_type as_int()   const   {return value_;}
  BOOST_CONSTEXPR operator int_type() const {return value_;}
  //!Add, return number of wraps performed
  /*! The sign of the returned value will indicate which direction the
   * wraps went. Ex: add a negative number and wrapping under could occur,
   * this would be indicated by a negative return value. If wrapping over
   * took place, a positive value would be returned */
  template< typename IntT >
  BOOST_CXX14_CONSTEXPR IntT add(IntT v)
  {
    int_type remainder = static_cast<int_type>(v % (wrap_max - wrap_min + 1));
    IntT overflow = static_cast<IntT>(v / (wrap_max - wrap_min + 1));
    value_ = static_cast<int_type>(value_ + remainder);
    return calculate_wrap(overflow);
  }
  //! Subtract will return '-d' if wrapping under took place ('d' is the number of wraps)
  /*! The sign of the returned value will indicate which direction the
   * wraps went. Ex: subtract a negative number and wrapping over could
   * occur, this would be indicated by a positive return value. If
   * wrapping under took place, a negative value would be returned */
  template< typename IntT >
  BOOST_CXX14_CONSTEXPR IntT subtract(IntT v)
  {
    int_type remainder = static_cast<int_type>(v % (wrap_max - wrap_min + 1));
    IntT underflow = static_cast<IntT>(-(v / (wrap_max - wrap_min + 1)));
    value_ = static_cast<int_type>(value_ - remainder);
    return calculate_wrap(underflow);
  }

private:
  int_type value_;

template< typename IntT >
  BOOST_CXX14_CONSTEXPR IntT calculate_wrap(IntT wrap)
  {
    if ((value_) > wrap_max)
    {
      ++wrap;
      value_ -= (wrap_max - wrap_min + 1);
    }
    else if((value_) < wrap_min)
    {
      --wrap;
      value_ += (wrap_max - wrap_min + 1);
    }
    return wrap;
  }
};

} } //namespace date_time

#endif

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