1#ifndef _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___
2#define _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___
3
4/* Copyright (c) 2004 CrystalClear Software, Inc.
5 * Use, modification and distribution is subject to the
6 * Boost Software License, Version 1.0. (See accompanying
7 * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
8 * Author: Jeff Garland, Bart Garst
9 * $Date$
10 */
11
12#include <iostream>
13#include <string>
14#include <vector>
15#include <algorithm>
16#include "boost/date_time/date_generators.hpp"
17
18namespace boost {
19namespace date_time {
20
21 //! Formats date_generators for output
22 /*! Formatting of date_generators follows specific orders for the
23 * various types of date_generators.
24 * - partial_date => "dd Month"
25 * - nth_day_of_the_week_in_month => "nth weekday of month"
26 * - first_day_of_the_week_in_month => "first weekday of month"
27 * - last_day_of_the_week_in_month => "last weekday of month"
28 * - first_day_of_the_week_after => "weekday after"
29 * - first_day_of_the_week_before => "weekday before"
30 * While the order of the elements in these phrases cannot be changed,
31 * the elements themselves can be. Weekday and Month get their formats
32 * and names from the date_facet. The remaining elements are stored in
33 * the date_generator_formatter and can be customized upon construction
34 * or via a member function. The default elements are those shown in the
35 * examples above.
36 */
37 template <class date_type, class CharT, class OutItrT = std::ostreambuf_iterator<CharT, std::char_traits<CharT> > >
38 class date_generator_formatter {
39 public:
40 typedef partial_date<date_type> partial_date_type;
41 typedef nth_kday_of_month<date_type> nth_kday_type;
42 typedef first_kday_of_month<date_type> first_kday_type;
43 typedef last_kday_of_month<date_type> last_kday_type;
44 typedef first_kday_after<date_type> kday_after_type;
45 typedef first_kday_before<date_type> kday_before_type;
46
47 typedef CharT char_type;
48 typedef std::basic_string<char_type> string_type;
49 typedef std::vector<string_type> collection_type;
50 static const char_type first_string[6];
51 static const char_type second_string[7];
52 static const char_type third_string[6];
53 static const char_type fourth_string[7];
54 static const char_type fifth_string[6];
55 static const char_type last_string[5];
56 static const char_type before_string[8];
57 static const char_type after_string[6];
58 static const char_type of_string[3];
59
60 enum phrase_elements {first=0, second, third, fourth, fifth, last,
61 before, after, of, number_of_phrase_elements};
62
63 //! Default format elements used
64 date_generator_formatter()
65 {
66 phrase_strings.reserve(number_of_phrase_elements);
67 phrase_strings.push_back(string_type(first_string));
68 phrase_strings.push_back(string_type(second_string));
69 phrase_strings.push_back(string_type(third_string));
70 phrase_strings.push_back(string_type(fourth_string));
71 phrase_strings.push_back(string_type(fifth_string));
72 phrase_strings.push_back(string_type(last_string));
73 phrase_strings.push_back(string_type(before_string));
74 phrase_strings.push_back(string_type(after_string));
75 phrase_strings.push_back(string_type(of_string));
76 }
77
78 //! Constructor that allows for a custom set of phrase elements
79 date_generator_formatter(const string_type& first_str,
80 const string_type& second_str,
81 const string_type& third_str,
82 const string_type& fourth_str,
83 const string_type& fifth_str,
84 const string_type& last_str,
85 const string_type& before_str,
86 const string_type& after_str,
87 const string_type& of_str)
88 {
89 phrase_strings.reserve(number_of_phrase_elements);
90 phrase_strings.push_back(first_str);
91 phrase_strings.push_back(second_str);
92 phrase_strings.push_back(third_str);
93 phrase_strings.push_back(fourth_str);
94 phrase_strings.push_back(fifth_str);
95 phrase_strings.push_back(last_str);
96 phrase_strings.push_back(before_str);
97 phrase_strings.push_back(after_str);
98 phrase_strings.push_back(of_str);
99 }
100
101 //! Replace the set of phrase elements with those contained in new_strings
102 /*! The order of the strings in the given collection is important.
103 * They must follow:
104 * - first, second, third, fourth, fifth, last, before, after, of.
105 *
106 * It is not necessary to send in a complete set if only a few
107 * elements are to be replaced as long as the correct beg_pos is used.
108 *
109 * Ex: To keep the default first through fifth elements, but replace
110 * the rest with a collection of:
111 * - "final", "prior", "following", "in".
112 * The beg_pos of date_generator_formatter::last would be used.
113 */
114 void elements(const collection_type& new_strings,
115 phrase_elements beg_pos=first)
116 {
117 if(beg_pos < number_of_phrase_elements) {
118 typename collection_type::iterator itr = phrase_strings.begin();
119 itr += beg_pos;
120 std::copy(new_strings.begin(), new_strings.end(),
121 itr);
122 //phrase_strings.begin());
123 }
124 }
125
126 //!Put a partial_date => "dd Month"
127 template<class facet_type>
128 OutItrT put_partial_date(OutItrT next, std::ios_base& a_ios,
129 CharT a_fill, const partial_date_type& pd,
130 const facet_type& facet) const
131 {
132 facet.put(next, a_ios, a_fill, pd.day());
133 next = a_fill; //TODO change this ???
134 facet.put(next, a_ios, a_fill, pd.month());
135 return next;
136 }
137
138 //! Put an nth_day_of_the_week_in_month => "nth weekday of month"
139 template<class facet_type>
140 OutItrT put_nth_kday(OutItrT next, std::ios_base& a_ios,
141 CharT a_fill, const nth_kday_type& nkd,
142 const facet_type& facet) const
143 {
144 put_string(next, str: phrase_strings[nkd.nth_week() -1]);
145 next = a_fill; //TODO change this ???
146 facet.put(next, a_ios, a_fill, nkd.day_of_week());
147 next = a_fill; //TODO change this ???
148 put_string(next, str: string_type(of_string));
149 next = a_fill; //TODO change this ???
150 facet.put(next, a_ios, a_fill, nkd.month());
151 return next;
152 }
153
154 //! Put a first_day_of_the_week_in_month => "first weekday of month"
155 template<class facet_type>
156 OutItrT put_first_kday(OutItrT next, std::ios_base& a_ios,
157 CharT a_fill, const first_kday_type& fkd,
158 const facet_type& facet) const
159 {
160 put_string(next, str: phrase_strings[first]);
161 next = a_fill; //TODO change this ???
162 facet.put(next, a_ios, a_fill, fkd.day_of_week());
163 next = a_fill; //TODO change this ???
164 put_string(next, str: string_type(of_string));
165 next = a_fill; //TODO change this ???
166 facet.put(next, a_ios, a_fill, fkd.month());
167 return next;
168 }
169
170 //! Put a last_day_of_the_week_in_month => "last weekday of month"
171 template<class facet_type>
172 OutItrT put_last_kday(OutItrT next, std::ios_base& a_ios,
173 CharT a_fill, const last_kday_type& lkd,
174 const facet_type& facet) const
175 {
176 put_string(next, str: phrase_strings[last]);
177 next = a_fill; //TODO change this ???
178 facet.put(next, a_ios, a_fill, lkd.day_of_week());
179 next = a_fill; //TODO change this ???
180 put_string(next, str: string_type(of_string));
181 next = a_fill; //TODO change this ???
182 facet.put(next, a_ios, a_fill, lkd.month());
183 return next;
184 }
185
186 //! Put a first_day_of_the_week_before => "weekday before"
187 template<class facet_type>
188 OutItrT put_kday_before(OutItrT next, std::ios_base& a_ios,
189 CharT a_fill, const kday_before_type& fkb,
190 const facet_type& facet) const
191 {
192 facet.put(next, a_ios, a_fill, fkb.day_of_week());
193 next = a_fill; //TODO change this ???
194 put_string(next, str: phrase_strings[before]);
195 return next;
196 }
197
198 //! Put a first_day_of_the_week_after => "weekday after"
199 template<class facet_type>
200 OutItrT put_kday_after(OutItrT next, std::ios_base& a_ios,
201 CharT a_fill, const kday_after_type& fka,
202 const facet_type& facet) const
203 {
204 facet.put(next, a_ios, a_fill, fka.day_of_week());
205 next = a_fill; //TODO change this ???
206 put_string(next, str: phrase_strings[after]);
207 return next;
208 }
209
210
211 private:
212 collection_type phrase_strings;
213
214 //! helper function to put the various member string into stream
215 OutItrT put_string(OutItrT next, const string_type& str) const
216 {
217 typename string_type::const_iterator itr = str.begin();
218 while(itr != str.end()) {
219 *next = *itr;
220 ++itr;
221 ++next;
222 }
223 return next;
224 }
225 };
226
227 template<class date_type, class CharT, class OutItrT>
228 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
229 date_generator_formatter<date_type, CharT, OutItrT>::first_string[6] =
230 {'f','i','r','s','t'};
231 template<class date_type, class CharT, class OutItrT>
232 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
233 date_generator_formatter<date_type, CharT, OutItrT>::second_string[7] =
234 {'s','e','c','o','n','d'};
235 template<class date_type, class CharT, class OutItrT>
236 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
237 date_generator_formatter<date_type, CharT, OutItrT>::third_string[6] =
238 {'t','h','i','r','d'};
239 template<class date_type, class CharT, class OutItrT>
240 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
241 date_generator_formatter<date_type, CharT, OutItrT>::fourth_string[7] =
242 {'f','o','u','r','t','h'};
243 template<class date_type, class CharT, class OutItrT>
244 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
245 date_generator_formatter<date_type, CharT, OutItrT>::fifth_string[6] =
246 {'f','i','f','t','h'};
247 template<class date_type, class CharT, class OutItrT>
248 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
249 date_generator_formatter<date_type, CharT, OutItrT>::last_string[5] =
250 {'l','a','s','t'};
251 template<class date_type, class CharT, class OutItrT>
252 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
253 date_generator_formatter<date_type, CharT, OutItrT>::before_string[8] =
254 {'b','e','f','o','r','e'};
255 template<class date_type, class CharT, class OutItrT>
256 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
257 date_generator_formatter<date_type, CharT, OutItrT>::after_string[6] =
258 {'a','f','t','e','r'};
259 template<class date_type, class CharT, class OutItrT>
260 const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
261 date_generator_formatter<date_type, CharT, OutItrT>::of_string[3] =
262 {'o','f'};
263} } // namespaces
264
265#endif // _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___
266

source code of boost/boost/date_time/date_generator_formatter.hpp