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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #if defined( WNT )
21 : #include <windows.h>
22 : #else
23 : #include <time.h>
24 : #endif
25 :
26 : #include <tools/date.hxx>
27 : #include <sal/log.hxx>
28 :
29 : #ifdef MACOSX
30 : extern "C" {
31 : struct tm *localtime_r(const time_t *timep, struct tm *buffer);
32 : }
33 : #endif
34 :
35 : static sal_uInt16 aDaysInMonth[12] = { 31, 28, 31, 30, 31, 30,
36 : 31, 31, 30, 31, 30, 31 };
37 :
38 : #define MAX_DAYS 3636532
39 :
40 30072 : inline bool ImpIsLeapYear( sal_uInt16 nYear )
41 : {
42 59881 : return ( ( ((nYear % 4) == 0) && ((nYear % 100) != 0) ) ||
43 59881 : ( (nYear % 400) == 0 ) );
44 : }
45 :
46 : // All callers must have sanitized or normalized month and year values!
47 302043 : inline sal_uInt16 ImplDaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear )
48 : {
49 302043 : if ( nMonth != 2 )
50 271971 : return aDaysInMonth[nMonth-1];
51 : else
52 : {
53 30072 : if (ImpIsLeapYear(nYear))
54 281 : return aDaysInMonth[nMonth-1] + 1;
55 : else
56 29791 : return aDaysInMonth[nMonth-1];
57 : }
58 : }
59 :
60 : // static
61 4 : sal_uInt16 Date::GetDaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear )
62 : {
63 : SAL_WARN_IF( nMonth < 1 || 12 < nMonth, "tools", "Date::GetDaysInMonth - nMonth out of bounds " << nMonth);
64 4 : if (nMonth < 1)
65 0 : nMonth = 1;
66 4 : else if (12 < nMonth)
67 4 : nMonth = 12;
68 4 : return ImplDaysInMonth( nMonth, nYear);
69 : }
70 :
71 23572 : long Date::DateToDays( sal_uInt16 nDay, sal_uInt16 nMonth, sal_uInt16 nYear )
72 : {
73 : long nDays;
74 :
75 23572 : Normalize( nDay, nMonth, nYear);
76 :
77 23572 : nDays = ((sal_uIntPtr)nYear-1) * 365;
78 23572 : nDays += ((nYear-1) / 4) - ((nYear-1) / 100) + ((nYear-1) / 400);
79 206233 : for( sal_uInt16 i = 1; i < nMonth; i++ )
80 182661 : nDays += ImplDaysInMonth(i,nYear);
81 23572 : nDays += nDay;
82 23572 : return nDays;
83 : }
84 :
85 10119 : static void DaysToDate( long nDays,
86 : sal_uInt16& rDay, sal_uInt16& rMonth, sal_uInt16& rYear )
87 : {
88 : long nTempDays;
89 10119 : long i = 0;
90 : bool bCalc;
91 :
92 11700 : do
93 : {
94 11700 : nTempDays = (long)nDays;
95 11700 : rYear = (sal_uInt16)((nTempDays / 365) - i);
96 11700 : nTempDays -= ((sal_uIntPtr)rYear-1) * 365;
97 11700 : nTempDays -= ((rYear-1) / 4) - ((rYear-1) / 100) + ((rYear-1) / 400);
98 11700 : bCalc = false;
99 11700 : if ( nTempDays < 1 )
100 : {
101 1581 : i++;
102 1581 : bCalc = true;
103 : }
104 : else
105 : {
106 10119 : if ( nTempDays > 365 )
107 : {
108 0 : if ( (nTempDays != 366) || !ImpIsLeapYear( rYear ) )
109 : {
110 0 : i--;
111 0 : bCalc = true;
112 : }
113 : }
114 : }
115 : }
116 : while ( bCalc );
117 :
118 10119 : rMonth = 1;
119 61426 : while ( (sal_uIntPtr)nTempDays > ImplDaysInMonth( rMonth, rYear ) )
120 : {
121 41188 : nTempDays -= ImplDaysInMonth( rMonth, rYear );
122 41188 : rMonth++;
123 : }
124 10119 : rDay = (sal_uInt16)nTempDays;
125 10119 : }
126 :
127 7363 : Date::Date( DateInitSystem )
128 : {
129 : #if defined WNT
130 : SYSTEMTIME aDateTime;
131 : GetLocalTime( &aDateTime );
132 :
133 : // Combine to date
134 : nDate = ((sal_uIntPtr)aDateTime.wDay) +
135 : (((sal_uIntPtr)aDateTime.wMonth)*100) +
136 : (((sal_uIntPtr)aDateTime.wYear)*10000);
137 : #else
138 : time_t nTmpTime;
139 : struct tm aTime;
140 :
141 : // get current time
142 7363 : nTmpTime = time( 0 );
143 :
144 : // compute date
145 7363 : if ( localtime_r( &nTmpTime, &aTime ) )
146 : {
147 : nDate = ((sal_uIntPtr)aTime.tm_mday) +
148 22089 : (((sal_uIntPtr)(aTime.tm_mon+1))*100) +
149 22089 : (((sal_uIntPtr)(aTime.tm_year+1900))*10000);
150 : }
151 : else
152 0 : nDate = 1 + 100 + (((sal_uIntPtr)1900)*10000);
153 : #endif
154 7363 : }
155 :
156 18 : void Date::SetDay( sal_uInt16 nNewDay )
157 : {
158 18 : sal_uIntPtr nMonth = GetMonth();
159 18 : sal_uIntPtr nYear = GetYear();
160 :
161 18 : nDate = ((sal_uIntPtr)(nNewDay%100)) + (nMonth*100) + (nYear*10000);
162 18 : }
163 :
164 14 : void Date::SetMonth( sal_uInt16 nNewMonth )
165 : {
166 14 : sal_uIntPtr nDay = GetDay();
167 14 : sal_uIntPtr nYear = GetYear();
168 :
169 14 : nDate = nDay + (((sal_uIntPtr)(nNewMonth%100))*100) + (nYear*10000);
170 14 : }
171 :
172 218 : void Date::SetYear( sal_uInt16 nNewYear )
173 : {
174 218 : sal_uIntPtr nDay = GetDay();
175 218 : sal_uIntPtr nMonth = GetMonth();
176 :
177 218 : nDate = nDay + (nMonth*100) + (((sal_uIntPtr)(nNewYear%10000))*10000);
178 218 : }
179 :
180 15 : DayOfWeek Date::GetDayOfWeek() const
181 : {
182 15 : return (DayOfWeek)((sal_uIntPtr)(DateToDays( GetDay(), GetMonth(), GetYear() )-1) % 7);
183 : }
184 :
185 44 : sal_uInt16 Date::GetDayOfYear() const
186 : {
187 44 : sal_uInt16 nDay = GetDay();
188 44 : sal_uInt16 nMonth = GetMonth();
189 44 : sal_uInt16 nYear = GetYear();
190 44 : Normalize( nDay, nMonth, nYear);
191 :
192 151 : for( sal_uInt16 i = 1; i < nMonth; i++ )
193 107 : nDay = nDay + ::ImplDaysInMonth( i, nYear ); // += yields a warning on MSVC, so don't use it
194 44 : return nDay;
195 : }
196 :
197 0 : sal_uInt16 Date::GetWeekOfYear( DayOfWeek eStartDay,
198 : sal_Int16 nMinimumNumberOfDaysInWeek ) const
199 : {
200 : short nWeek;
201 0 : short n1WDay = (short)Date( 1, 1, GetYear() ).GetDayOfWeek();
202 0 : short nDayOfYear = (short)GetDayOfYear();
203 :
204 : // weekdays start at 0, thus decrement one
205 0 : nDayOfYear--;
206 : // account for StartDay
207 0 : n1WDay = (n1WDay+(7-(short)eStartDay)) % 7;
208 :
209 0 : if (nMinimumNumberOfDaysInWeek < 1 || 7 < nMinimumNumberOfDaysInWeek)
210 : {
211 : SAL_WARN( "tools.datetime", "Date::GetWeekOfYear: invalid nMinimumNumberOfDaysInWeek" );
212 0 : nMinimumNumberOfDaysInWeek = 4;
213 : }
214 :
215 0 : if ( nMinimumNumberOfDaysInWeek == 1 )
216 : {
217 0 : nWeek = ((n1WDay+nDayOfYear)/7) + 1;
218 : // Set to 53rd week only if we're not in the
219 : // first week of the new year
220 0 : if ( nWeek == 54 )
221 0 : nWeek = 1;
222 0 : else if ( nWeek == 53 )
223 : {
224 0 : short nDaysInYear = (short)GetDaysInYear();
225 0 : short nDaysNextYear = (short)Date( 1, 1, GetYear()+1 ).GetDayOfWeek();
226 0 : nDaysNextYear = (nDaysNextYear+(7-(short)eStartDay)) % 7;
227 0 : if ( nDayOfYear > (nDaysInYear-nDaysNextYear-1) )
228 0 : nWeek = 1;
229 : }
230 : }
231 0 : else if ( nMinimumNumberOfDaysInWeek == 7 )
232 : {
233 0 : nWeek = ((n1WDay+nDayOfYear)/7);
234 : // First week of a year is equal to the last week of the previous year
235 0 : if ( nWeek == 0 )
236 : {
237 0 : Date aLastDatePrevYear( 31, 12, GetYear()-1 );
238 0 : nWeek = aLastDatePrevYear.GetWeekOfYear( eStartDay, nMinimumNumberOfDaysInWeek );
239 : }
240 : }
241 : else // ( nMinimumNumberOfDaysInWeek == somehing_else, commentary examples for 4 )
242 : {
243 : // x_monday - thursday
244 0 : if ( n1WDay < nMinimumNumberOfDaysInWeek )
245 0 : nWeek = 1;
246 : // Friday
247 0 : else if ( n1WDay == nMinimumNumberOfDaysInWeek )
248 0 : nWeek = 53;
249 : // Saturday
250 0 : else if ( n1WDay == nMinimumNumberOfDaysInWeek + 1 )
251 : {
252 : // Year after leapyear
253 0 : if ( Date( 1, 1, GetYear()-1 ).IsLeapYear() )
254 0 : nWeek = 53;
255 : else
256 0 : nWeek = 52;
257 : }
258 : // Sunday
259 : else
260 0 : nWeek = 52;
261 :
262 0 : if ( (nWeek == 1) || (nDayOfYear + n1WDay > 6) )
263 : {
264 0 : if ( nWeek == 1 )
265 0 : nWeek += (nDayOfYear + n1WDay) / 7;
266 : else
267 0 : nWeek = (nDayOfYear + n1WDay) / 7;
268 0 : if ( nWeek == 53 )
269 : {
270 : // next x_Sunday == first x_Sunday in the new year
271 : // == still the same week!
272 0 : long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
273 0 : nTempDays += 6 - (GetDayOfWeek()+(7-(short)eStartDay)) % 7;
274 : sal_uInt16 nDay;
275 : sal_uInt16 nMonth;
276 : sal_uInt16 nYear;
277 0 : DaysToDate( nTempDays, nDay, nMonth, nYear );
278 0 : nWeek = Date( nDay, nMonth, nYear ).GetWeekOfYear( eStartDay, nMinimumNumberOfDaysInWeek );
279 : }
280 : }
281 : }
282 :
283 0 : return (sal_uInt16)nWeek;
284 : }
285 :
286 1376 : sal_uInt16 Date::GetDaysInMonth() const
287 : {
288 1376 : sal_uInt16 nDay = GetDay();
289 1376 : sal_uInt16 nMonth = GetMonth();
290 1376 : sal_uInt16 nYear = GetYear();
291 1376 : Normalize( nDay, nMonth, nYear);
292 :
293 1376 : return ImplDaysInMonth( nMonth, nYear );
294 : }
295 :
296 0 : bool Date::IsLeapYear() const
297 : {
298 0 : sal_uInt16 nYear = GetYear();
299 0 : return ImpIsLeapYear( nYear );
300 : }
301 :
302 63 : bool Date::IsValidAndGregorian() const
303 : {
304 63 : sal_uInt16 nDay = GetDay();
305 63 : sal_uInt16 nMonth = GetMonth();
306 63 : sal_uInt16 nYear = GetYear();
307 :
308 63 : if ( !nMonth || (nMonth > 12) )
309 3 : return false;
310 60 : if ( !nDay || (nDay > ImplDaysInMonth( nMonth, nYear )) )
311 0 : return false;
312 60 : else if ( nYear <= 1582 )
313 : {
314 0 : if ( nYear < 1582 )
315 0 : return false;
316 0 : else if ( nMonth < 10 )
317 0 : return false;
318 0 : else if ( (nMonth == 10) && (nDay < 15) )
319 0 : return false;
320 : }
321 :
322 60 : return true;
323 : }
324 :
325 332 : bool Date::IsValidDate() const
326 : {
327 332 : return IsValidDate( GetDay(), GetMonth(), GetYear());
328 : }
329 :
330 : //static
331 25328 : bool Date::IsValidDate( sal_uInt16 nDay, sal_uInt16 nMonth, sal_uInt16 nYear )
332 : {
333 25328 : if ( !nMonth || (nMonth > 12) )
334 25 : return false;
335 25303 : if ( !nDay || (nDay > ImplDaysInMonth( nMonth, nYear )) )
336 0 : return false;
337 25303 : return true;
338 : }
339 :
340 4 : bool Date::Normalize()
341 : {
342 4 : sal_uInt16 nDay = GetDay();
343 4 : sal_uInt16 nMonth = GetMonth();
344 4 : sal_uInt16 nYear = GetYear();
345 :
346 4 : if (!Normalize( nDay, nMonth, nYear))
347 4 : return false;
348 :
349 0 : SetDay( nDay);
350 0 : SetMonth( nMonth);
351 0 : SetYear( nYear);
352 :
353 0 : return true;
354 : }
355 :
356 : //static
357 24996 : bool Date::Normalize( sal_uInt16 & rDay, sal_uInt16 & rMonth, sal_uInt16 & rYear )
358 : {
359 24996 : if (IsValidDate( rDay, rMonth, rYear))
360 24975 : return false;
361 :
362 21 : if (rMonth > 12)
363 : {
364 18 : rYear += rMonth / 12;
365 18 : rMonth = rMonth % 12;
366 : }
367 21 : if (!rMonth)
368 : {
369 3 : if (!rYear)
370 : {
371 3 : rYear = 0;
372 3 : rMonth = 1;
373 3 : if (rDay > 31)
374 0 : rDay -= 31;
375 : else
376 3 : rDay = 1;
377 : }
378 : else
379 : {
380 0 : --rYear;
381 0 : rMonth = 12;
382 : }
383 : }
384 : sal_uInt16 nDays;
385 58 : while (rDay > (nDays = ImplDaysInMonth( rMonth, rYear)))
386 : {
387 16 : rDay -= nDays;
388 16 : if (rMonth < 12)
389 16 : ++rMonth;
390 : else
391 : {
392 0 : ++rYear;
393 0 : rMonth = 1;
394 : }
395 : }
396 21 : if (rYear > 9999)
397 : {
398 0 : rDay = 31;
399 0 : rMonth = 12;
400 0 : rYear = 9999;
401 : }
402 21 : return true;
403 : }
404 :
405 10097 : Date& Date::operator +=( long nDays )
406 : {
407 : sal_uInt16 nDay;
408 : sal_uInt16 nMonth;
409 : sal_uInt16 nYear;
410 10097 : long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
411 :
412 10097 : nTempDays += nDays;
413 10097 : if ( nTempDays > MAX_DAYS )
414 0 : nDate = 31 + (12*100) + (((sal_uIntPtr)9999)*10000);
415 10097 : else if ( nTempDays <= 0 )
416 0 : nDate = 1 + 100;
417 : else
418 : {
419 10097 : DaysToDate( nTempDays, nDay, nMonth, nYear );
420 10097 : nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
421 : }
422 :
423 10097 : return *this;
424 : }
425 :
426 9 : Date& Date::operator -=( long nDays )
427 : {
428 : sal_uInt16 nDay;
429 : sal_uInt16 nMonth;
430 : sal_uInt16 nYear;
431 9 : long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
432 :
433 9 : nTempDays -= nDays;
434 9 : if ( nTempDays > MAX_DAYS )
435 0 : nDate = 31 + (12*100) + (((sal_uIntPtr)9999)*10000);
436 9 : else if ( nTempDays <= 0 )
437 0 : nDate = 1 + 100;
438 : else
439 : {
440 9 : DaysToDate( nTempDays, nDay, nMonth, nYear );
441 9 : nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
442 : }
443 :
444 9 : return *this;
445 : }
446 :
447 13 : Date& Date::operator ++()
448 : {
449 : sal_uInt16 nDay;
450 : sal_uInt16 nMonth;
451 : sal_uInt16 nYear;
452 13 : long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
453 :
454 13 : if ( nTempDays < MAX_DAYS )
455 : {
456 13 : nTempDays++;
457 13 : DaysToDate( nTempDays, nDay, nMonth, nYear );
458 13 : nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
459 : }
460 :
461 13 : return *this;
462 : }
463 :
464 0 : Date& Date::operator --()
465 : {
466 : sal_uInt16 nDay;
467 : sal_uInt16 nMonth;
468 : sal_uInt16 nYear;
469 0 : long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
470 :
471 0 : if ( nTempDays > 1 )
472 : {
473 0 : nTempDays--;
474 0 : DaysToDate( nTempDays, nDay, nMonth, nYear );
475 0 : nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
476 : }
477 0 : return *this;
478 : }
479 :
480 2 : Date Date::operator ++( int )
481 : {
482 2 : Date aOldDate = *this;
483 2 : Date::operator++();
484 2 : return aOldDate;
485 : }
486 :
487 0 : Date Date::operator --( int )
488 : {
489 0 : Date aOldDate = *this;
490 0 : Date::operator--();
491 0 : return aOldDate;
492 : }
493 :
494 3934 : Date operator +( const Date& rDate, long nDays )
495 : {
496 3934 : Date aDate( rDate );
497 3934 : aDate += nDays;
498 3934 : return aDate;
499 : }
500 :
501 9 : Date operator -( const Date& rDate, long nDays )
502 : {
503 9 : Date aDate( rDate );
504 9 : aDate -= nDays;
505 9 : return aDate;
506 : }
507 :
508 6719 : long operator -( const Date& rDate1, const Date& rDate2 )
509 : {
510 13438 : sal_uIntPtr nTempDays1 = Date::DateToDays( rDate1.GetDay(), rDate1.GetMonth(),
511 20157 : rDate1.GetYear() );
512 13438 : sal_uIntPtr nTempDays2 = Date::DateToDays( rDate2.GetDay(), rDate2.GetMonth(),
513 20157 : rDate2.GetYear() );
514 6719 : return nTempDays1 - nTempDays2;
515 : }
516 :
517 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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