source: vendor/nemo/current/NEMOGCM/EXTERNAL/XIOS/extern/boost/include/boost/date_time/local_time/date_duration_operators.hpp @ 44

Last change on this file since 44 was 44, checked in by cholod, 12 years ago

Load NEMO_TMP into vendor/nemo/current.
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1#ifndef LOCAL_TIME_DATE_DURATION_OPERATORS_HPP___
2#define LOCAL_TIME_DATE_DURATION_OPERATORS_HPP___
3                                                                               
4/* Copyright (c) 2004 CrystalClear Software, Inc.
5 * Subject to the Boost Software License, Version 1.0.
6 * (See accompanying file LICENSE_1_0.txt or
7 * http://www.boost.org/LICENSE_1_0.txt)
8 * Author: Jeff Garland, Bart Garst
9 * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $
10 */
11
12#include "boost/date_time/gregorian/greg_duration_types.hpp"
13#include "boost/date_time/local_time/local_date_time.hpp"
14
15namespace boost {
16namespace local_time {
17 
18  /*!@file date_duration_operators.hpp Operators for local_date_time and
19   * optional gregorian types. Operators use snap-to-end-of-month behavior.
20   * Further details on this behavior can be found in reference for
21   * date_time/date_duration_types.hpp and documentation for
22   * month and year iterators.
23   */
24 
25
26  /*! Adds a months object and a local_date_time. Result will be same
27   * day-of-month as local_date_time unless original day was the last day of month.
28   * see date_time::months_duration for more details */
29  inline
30  local_date_time
31  operator+(const local_date_time& t, const boost::gregorian::months& m)
32  {
33    return t + m.get_offset(t.utc_time().date());
34  }
35 
36  /*! Adds a months object to a local_date_time. Result will be same
37   * day-of-month as local_date_time unless original day was the last day of month.
38   * see date_time::months_duration for more details */
39  inline
40  local_date_time
41  operator+=(local_date_time& t, const boost::gregorian::months& m)
42  {
43    return t += m.get_offset(t.utc_time().date());
44  }
45
46  /*! Subtracts a months object and a local_date_time. Result will be same
47   * day-of-month as local_date_time unless original day was the last day of month.
48   * see date_time::months_duration for more details */
49  inline
50  local_date_time
51  operator-(const local_date_time& t, const boost::gregorian::months& m)
52  {
53    // get_neg_offset returns a negative duration, so we add
54    return t + m.get_neg_offset(t.utc_time().date());
55  }
56 
57  /*! Subtracts a months object from a local_date_time. Result will be same
58   * day-of-month as local_date_time unless original day was the last day of month.
59   * see date_time::months_duration for more details */
60  inline
61  local_date_time
62  operator-=(local_date_time& t, const boost::gregorian::months& m)
63  {
64    // get_neg_offset returns a negative duration, so we add
65    return t += m.get_neg_offset(t.utc_time().date());
66  }
67
68  // local_date_time & years
69 
70  /*! Adds a years object and a local_date_time. Result will be same
71   * month and day-of-month as local_date_time unless original day was the
72   * last day of month. see date_time::years_duration for more details */
73  inline
74  local_date_time
75  operator+(const local_date_time& t, const boost::gregorian::years& y)
76  {
77    return t + y.get_offset(t.utc_time().date());
78  }
79
80  /*! Adds a years object to a local_date_time. Result will be same
81   * month and day-of-month as local_date_time unless original day was the
82   * last day of month. see date_time::years_duration for more details */
83  inline
84  local_date_time
85  operator+=(local_date_time& t, const boost::gregorian::years& y)
86  {
87    return t += y.get_offset(t.utc_time().date());
88  }
89
90  /*! Subtracts a years object and a local_date_time. Result will be same
91   * month and day-of-month as local_date_time unless original day was the
92   * last day of month. see date_time::years_duration for more details */
93  inline
94  local_date_time
95  operator-(const local_date_time& t, const boost::gregorian::years& y)
96  {
97    // get_neg_offset returns a negative duration, so we add
98    return t + y.get_neg_offset(t.utc_time().date());
99  }
100
101  /*! Subtracts a years object from a local_date_time. Result will be same
102   * month and day-of-month as local_date_time unless original day was the
103   * last day of month. see date_time::years_duration for more details */
104  inline
105  local_date_time
106  operator-=(local_date_time& t, const boost::gregorian::years& y)
107  {
108    // get_neg_offset returns a negative duration, so we add
109    return t += y.get_neg_offset(t.utc_time().date());
110  }
111
112
113}} // namespaces
114
115#endif // LOCAL_TIME_DATE_DURATION_OPERATORS_HPP___
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