| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/common/datetime.cpp |
| 3 | // Purpose: implementation of time/date related classes |
| 4 | // (for formatting&parsing see datetimefmt.cpp) |
| 5 | // Author: Vadim Zeitlin |
| 6 | // Modified by: |
| 7 | // Created: 11.05.99 |
| 8 | // RCS-ID: $Id$ |
| 9 | // Copyright: (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| 10 | // parts of code taken from sndcal library by Scott E. Lee: |
| 11 | // |
| 12 | // Copyright 1993-1995, Scott E. Lee, all rights reserved. |
| 13 | // Permission granted to use, copy, modify, distribute and sell |
| 14 | // so long as the above copyright and this permission statement |
| 15 | // are retained in all copies. |
| 16 | // |
| 17 | // Licence: wxWindows licence |
| 18 | /////////////////////////////////////////////////////////////////////////////// |
| 19 | |
| 20 | /* |
| 21 | * Implementation notes: |
| 22 | * |
| 23 | * 1. the time is stored as a 64bit integer containing the signed number of |
| 24 | * milliseconds since Jan 1. 1970 (the Unix Epoch) - so it is always |
| 25 | * expressed in GMT. |
| 26 | * |
| 27 | * 2. the range is thus something about 580 million years, but due to current |
| 28 | * algorithms limitations, only dates from Nov 24, 4714BC are handled |
| 29 | * |
| 30 | * 3. standard ANSI C functions are used to do time calculations whenever |
| 31 | * possible, i.e. when the date is in the range Jan 1, 1970 to 2038 |
| 32 | * |
| 33 | * 4. otherwise, the calculations are done by converting the date to/from JDN |
| 34 | * first (the range limitation mentioned above comes from here: the |
| 35 | * algorithm used by Scott E. Lee's code only works for positive JDNs, more |
| 36 | * or less) |
| 37 | * |
| 38 | * 5. the object constructed for the given DD-MM-YYYY HH:MM:SS corresponds to |
| 39 | * this moment in local time and may be converted to the object |
| 40 | * corresponding to the same date/time in another time zone by using |
| 41 | * ToTimezone() |
| 42 | * |
| 43 | * 6. the conversions to the current (or any other) timezone are done when the |
| 44 | * internal time representation is converted to the broken-down one in |
| 45 | * wxDateTime::Tm. |
| 46 | */ |
| 47 | |
| 48 | // ============================================================================ |
| 49 | // declarations |
| 50 | // ============================================================================ |
| 51 | |
| 52 | // ---------------------------------------------------------------------------- |
| 53 | // headers |
| 54 | // ---------------------------------------------------------------------------- |
| 55 | |
| 56 | // For compilers that support precompilation, includes "wx.h". |
| 57 | #include "wx/wxprec.h" |
| 58 | |
| 59 | #ifdef __BORLANDC__ |
| 60 | #pragma hdrstop |
| 61 | #endif |
| 62 | |
| 63 | #if !defined(wxUSE_DATETIME) || wxUSE_DATETIME |
| 64 | |
| 65 | #ifndef WX_PRECOMP |
| 66 | #ifdef __WXMSW__ |
| 67 | #include "wx/msw/wrapwin.h" |
| 68 | #endif |
| 69 | #include "wx/string.h" |
| 70 | #include "wx/log.h" |
| 71 | #include "wx/intl.h" |
| 72 | #include "wx/stopwatch.h" // for wxGetLocalTimeMillis() |
| 73 | #include "wx/module.h" |
| 74 | #include "wx/crt.h" |
| 75 | #endif // WX_PRECOMP |
| 76 | |
| 77 | #include "wx/thread.h" |
| 78 | #include "wx/tokenzr.h" |
| 79 | |
| 80 | #include <ctype.h> |
| 81 | |
| 82 | #ifdef __WINDOWS__ |
| 83 | #include <winnls.h> |
| 84 | #ifndef __WXWINCE__ |
| 85 | #include <locale.h> |
| 86 | #endif |
| 87 | #endif |
| 88 | |
| 89 | #include "wx/datetime.h" |
| 90 | |
| 91 | // ---------------------------------------------------------------------------- |
| 92 | // wxXTI |
| 93 | // ---------------------------------------------------------------------------- |
| 94 | |
| 95 | #if wxUSE_EXTENDED_RTTI |
| 96 | |
| 97 | template<> void wxStringReadValue(const wxString &s , wxDateTime &data ) |
| 98 | { |
| 99 | data.ParseFormat(s,"%Y-%m-%d %H:%M:%S", NULL); |
| 100 | } |
| 101 | |
| 102 | template<> void wxStringWriteValue(wxString &s , const wxDateTime &data ) |
| 103 | { |
| 104 | s = data.Format("%Y-%m-%d %H:%M:%S"); |
| 105 | } |
| 106 | |
| 107 | wxCUSTOM_TYPE_INFO(wxDateTime, wxToStringConverter<wxDateTime> , wxFromStringConverter<wxDateTime>) |
| 108 | |
| 109 | #endif // wxUSE_EXTENDED_RTTI |
| 110 | |
| 111 | |
| 112 | // ---------------------------------------------------------------------------- |
| 113 | // conditional compilation |
| 114 | // ---------------------------------------------------------------------------- |
| 115 | |
| 116 | #if defined(__MWERKS__) && wxUSE_UNICODE |
| 117 | #include <wtime.h> |
| 118 | #endif |
| 119 | |
| 120 | #if defined(__DJGPP__) || defined(__WINE__) |
| 121 | #include <sys/timeb.h> |
| 122 | #include <values.h> |
| 123 | #endif |
| 124 | |
| 125 | #ifndef WX_GMTOFF_IN_TM |
| 126 | // Define it for some systems which don't (always) use configure but are |
| 127 | // known to have tm_gmtoff field. |
| 128 | #if defined(__WXPALMOS__) || defined(__DARWIN__) |
| 129 | #define WX_GMTOFF_IN_TM |
| 130 | #endif |
| 131 | #endif |
| 132 | |
| 133 | // NB: VC8 safe time functions could/should be used for wxMSW as well probably |
| 134 | #if defined(__WXWINCE__) && defined(__VISUALC8__) |
| 135 | |
| 136 | struct tm *wxLocaltime_r(const time_t *t, struct tm* tm) |
| 137 | { |
| 138 | __time64_t t64 = *t; |
| 139 | return _localtime64_s(tm, &t64) == 0 ? tm : NULL; |
| 140 | } |
| 141 | |
| 142 | struct tm *wxGmtime_r(const time_t* t, struct tm* tm) |
| 143 | { |
| 144 | __time64_t t64 = *t; |
| 145 | return _gmtime64_s(tm, &t64) == 0 ? tm : NULL; |
| 146 | } |
| 147 | |
| 148 | #else // !wxWinCE with VC8 |
| 149 | |
| 150 | #if (!defined(HAVE_LOCALTIME_R) || !defined(HAVE_GMTIME_R)) && wxUSE_THREADS && !defined(__WINDOWS__) |
| 151 | static wxMutex timeLock; |
| 152 | #endif |
| 153 | |
| 154 | #ifndef HAVE_LOCALTIME_R |
| 155 | struct tm *wxLocaltime_r(const time_t* ticks, struct tm* temp) |
| 156 | { |
| 157 | #if wxUSE_THREADS && !defined(__WINDOWS__) |
| 158 | // No need to waste time with a mutex on windows since it's using |
| 159 | // thread local storage for localtime anyway. |
| 160 | wxMutexLocker locker(timeLock); |
| 161 | #endif |
| 162 | |
| 163 | // Borland CRT crashes when passed 0 ticks for some reason, see SF bug 1704438 |
| 164 | #ifdef __BORLANDC__ |
| 165 | if ( !*ticks ) |
| 166 | return NULL; |
| 167 | #endif |
| 168 | |
| 169 | const tm * const t = localtime(ticks); |
| 170 | if ( !t ) |
| 171 | return NULL; |
| 172 | |
| 173 | memcpy(temp, t, sizeof(struct tm)); |
| 174 | return temp; |
| 175 | } |
| 176 | #endif // !HAVE_LOCALTIME_R |
| 177 | |
| 178 | #ifndef HAVE_GMTIME_R |
| 179 | struct tm *wxGmtime_r(const time_t* ticks, struct tm* temp) |
| 180 | { |
| 181 | #if wxUSE_THREADS && !defined(__WINDOWS__) |
| 182 | // No need to waste time with a mutex on windows since it's |
| 183 | // using thread local storage for gmtime anyway. |
| 184 | wxMutexLocker locker(timeLock); |
| 185 | #endif |
| 186 | |
| 187 | #ifdef __BORLANDC__ |
| 188 | if ( !*ticks ) |
| 189 | return NULL; |
| 190 | #endif |
| 191 | |
| 192 | const tm * const t = gmtime(ticks); |
| 193 | if ( !t ) |
| 194 | return NULL; |
| 195 | |
| 196 | memcpy(temp, gmtime(ticks), sizeof(struct tm)); |
| 197 | return temp; |
| 198 | } |
| 199 | #endif // !HAVE_GMTIME_R |
| 200 | |
| 201 | #endif // wxWinCE with VC8/other platforms |
| 202 | |
| 203 | // ---------------------------------------------------------------------------- |
| 204 | // macros |
| 205 | // ---------------------------------------------------------------------------- |
| 206 | |
| 207 | // debugging helper: just a convenient replacement of wxCHECK() |
| 208 | #define wxDATETIME_CHECK(expr, msg) \ |
| 209 | wxCHECK2_MSG(expr, *this = wxInvalidDateTime; return *this, msg) |
| 210 | |
| 211 | // ---------------------------------------------------------------------------- |
| 212 | // private classes |
| 213 | // ---------------------------------------------------------------------------- |
| 214 | |
| 215 | class wxDateTimeHolidaysModule : public wxModule |
| 216 | { |
| 217 | public: |
| 218 | virtual bool OnInit() |
| 219 | { |
| 220 | wxDateTimeHolidayAuthority::AddAuthority(new wxDateTimeWorkDays); |
| 221 | |
| 222 | return true; |
| 223 | } |
| 224 | |
| 225 | virtual void OnExit() |
| 226 | { |
| 227 | wxDateTimeHolidayAuthority::ClearAllAuthorities(); |
| 228 | wxDateTimeHolidayAuthority::ms_authorities.clear(); |
| 229 | } |
| 230 | |
| 231 | private: |
| 232 | DECLARE_DYNAMIC_CLASS(wxDateTimeHolidaysModule) |
| 233 | }; |
| 234 | |
| 235 | IMPLEMENT_DYNAMIC_CLASS(wxDateTimeHolidaysModule, wxModule) |
| 236 | |
| 237 | // ---------------------------------------------------------------------------- |
| 238 | // constants |
| 239 | // ---------------------------------------------------------------------------- |
| 240 | |
| 241 | // some trivial ones |
| 242 | static const int MONTHS_IN_YEAR = 12; |
| 243 | |
| 244 | static const int SEC_PER_MIN = 60; |
| 245 | |
| 246 | static const int MIN_PER_HOUR = 60; |
| 247 | |
| 248 | static const long SECONDS_PER_DAY = 86400l; |
| 249 | |
| 250 | static const int DAYS_PER_WEEK = 7; |
| 251 | |
| 252 | static const long MILLISECONDS_PER_DAY = 86400000l; |
| 253 | |
| 254 | // this is the integral part of JDN of the midnight of Jan 1, 1970 |
| 255 | // (i.e. JDN(Jan 1, 1970) = 2440587.5) |
| 256 | static const long EPOCH_JDN = 2440587l; |
| 257 | |
| 258 | // these values are only used in asserts so don't define them if asserts are |
| 259 | // disabled to avoid warnings about unused static variables |
| 260 | #if wxDEBUG_LEVEL |
| 261 | // the date of JDN -0.5 (as we don't work with fractional parts, this is the |
| 262 | // reference date for us) is Nov 24, 4714BC |
| 263 | static const int JDN_0_YEAR = -4713; |
| 264 | static const int JDN_0_MONTH = wxDateTime::Nov; |
| 265 | static const int JDN_0_DAY = 24; |
| 266 | #endif // wxDEBUG_LEVEL |
| 267 | |
| 268 | // the constants used for JDN calculations |
| 269 | static const long JDN_OFFSET = 32046l; |
| 270 | static const long DAYS_PER_5_MONTHS = 153l; |
| 271 | static const long DAYS_PER_4_YEARS = 1461l; |
| 272 | static const long DAYS_PER_400_YEARS = 146097l; |
| 273 | |
| 274 | // this array contains the cumulated number of days in all previous months for |
| 275 | // normal and leap years |
| 276 | static const wxDateTime::wxDateTime_t gs_cumulatedDays[2][MONTHS_IN_YEAR] = |
| 277 | { |
| 278 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }, |
| 279 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 } |
| 280 | }; |
| 281 | |
| 282 | const long wxDateTime::TIME_T_FACTOR = 1000l; |
| 283 | |
| 284 | // ---------------------------------------------------------------------------- |
| 285 | // global data |
| 286 | // ---------------------------------------------------------------------------- |
| 287 | |
| 288 | const char wxDefaultDateTimeFormat[] = "%c"; |
| 289 | const char wxDefaultTimeSpanFormat[] = "%H:%M:%S"; |
| 290 | |
| 291 | // in the fine tradition of ANSI C we use our equivalent of (time_t)-1 to |
| 292 | // indicate an invalid wxDateTime object |
| 293 | const wxDateTime wxDefaultDateTime; |
| 294 | |
| 295 | wxDateTime::Country wxDateTime::ms_country = wxDateTime::Country_Unknown; |
| 296 | |
| 297 | // ---------------------------------------------------------------------------- |
| 298 | // private functions |
| 299 | // ---------------------------------------------------------------------------- |
| 300 | |
| 301 | // debugger helper: this function can be called from a debugger to show what |
| 302 | // the date really is |
| 303 | extern const char *wxDumpDate(const wxDateTime* dt) |
| 304 | { |
| 305 | static char buf[128]; |
| 306 | |
| 307 | wxString fmt(dt->Format("%Y-%m-%d (%a) %H:%M:%S")); |
| 308 | wxStrlcpy(buf, |
| 309 | (fmt + " (" + dt->GetValue().ToString() + " ticks)").ToAscii(), |
| 310 | WXSIZEOF(buf)); |
| 311 | |
| 312 | return buf; |
| 313 | } |
| 314 | |
| 315 | // get the number of days in the given month of the given year |
| 316 | static inline |
| 317 | wxDateTime::wxDateTime_t GetNumOfDaysInMonth(int year, wxDateTime::Month month) |
| 318 | { |
| 319 | // the number of days in month in Julian/Gregorian calendar: the first line |
| 320 | // is for normal years, the second one is for the leap ones |
| 321 | static const wxDateTime::wxDateTime_t daysInMonth[2][MONTHS_IN_YEAR] = |
| 322 | { |
| 323 | { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, |
| 324 | { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } |
| 325 | }; |
| 326 | |
| 327 | return daysInMonth[wxDateTime::IsLeapYear(year)][month]; |
| 328 | } |
| 329 | |
| 330 | // returns the time zone in the C sense, i.e. the difference UTC - local |
| 331 | // (in seconds) |
| 332 | // NOTE: not static because used by datetimefmt.cpp |
| 333 | int GetTimeZone() |
| 334 | { |
| 335 | #ifdef WX_GMTOFF_IN_TM |
| 336 | // set to true when the timezone is set |
| 337 | static bool s_timezoneSet = false; |
| 338 | static long gmtoffset = LONG_MAX; // invalid timezone |
| 339 | |
| 340 | // ensure that the timezone variable is set by calling wxLocaltime_r |
| 341 | if ( !s_timezoneSet ) |
| 342 | { |
| 343 | // just call wxLocaltime_r() instead of figuring out whether this |
| 344 | // system supports tzset(), _tzset() or something else |
| 345 | time_t t = 0; |
| 346 | struct tm tm; |
| 347 | |
| 348 | wxLocaltime_r(&t, &tm); |
| 349 | s_timezoneSet = true; |
| 350 | |
| 351 | // note that GMT offset is the opposite of time zone and so to return |
| 352 | // consistent results in both WX_GMTOFF_IN_TM and !WX_GMTOFF_IN_TM |
| 353 | // cases we have to negate it |
| 354 | gmtoffset = -tm.tm_gmtoff; |
| 355 | } |
| 356 | return (int)gmtoffset; |
| 357 | #elif defined(__DJGPP__) || defined(__WINE__) |
| 358 | struct timeb tb; |
| 359 | ftime(&tb); |
| 360 | return tb.timezone*60; |
| 361 | #elif defined(__VISUALC__) |
| 362 | // We must initialize the time zone information before using it (this will |
| 363 | // be done only once internally). |
| 364 | _tzset(); |
| 365 | |
| 366 | // Starting with VC++ 8 timezone variable is deprecated and is not even |
| 367 | // available in some standard library version so use the new function for |
| 368 | // accessing it instead. |
| 369 | #if wxCHECK_VISUALC_VERSION(8) |
| 370 | long t; |
| 371 | _get_timezone(&t); |
| 372 | return t; |
| 373 | #else // VC++ < 8 |
| 374 | return timezone; |
| 375 | #endif |
| 376 | #elif defined(WX_TIMEZONE) // If WX_TIMEZONE was defined by configure, use it. |
| 377 | return WX_TIMEZONE; |
| 378 | #elif defined(__BORLANDC__) || defined(__MINGW32__) || defined(__VISAGECPP__) |
| 379 | return _timezone; |
| 380 | #elif defined(__MWERKS__) |
| 381 | return 28800; |
| 382 | #else // unknown platform -- assume it has timezone |
| 383 | return timezone; |
| 384 | #endif // WX_GMTOFF_IN_TM/!WX_GMTOFF_IN_TM |
| 385 | } |
| 386 | |
| 387 | // return the integral part of the JDN for the midnight of the given date (to |
| 388 | // get the real JDN you need to add 0.5, this is, in fact, JDN of the |
| 389 | // noon of the previous day) |
| 390 | static long GetTruncatedJDN(wxDateTime::wxDateTime_t day, |
| 391 | wxDateTime::Month mon, |
| 392 | int year) |
| 393 | { |
| 394 | // CREDIT: code below is by Scott E. Lee (but bugs are mine) |
| 395 | |
| 396 | // check the date validity |
| 397 | wxASSERT_MSG( |
| 398 | (year > JDN_0_YEAR) || |
| 399 | ((year == JDN_0_YEAR) && (mon > JDN_0_MONTH)) || |
| 400 | ((year == JDN_0_YEAR) && (mon == JDN_0_MONTH) && (day >= JDN_0_DAY)), |
| 401 | wxT("date out of range - can't convert to JDN") |
| 402 | ); |
| 403 | |
| 404 | // make the year positive to avoid problems with negative numbers division |
| 405 | year += 4800; |
| 406 | |
| 407 | // months are counted from March here |
| 408 | int month; |
| 409 | if ( mon >= wxDateTime::Mar ) |
| 410 | { |
| 411 | month = mon - 2; |
| 412 | } |
| 413 | else |
| 414 | { |
| 415 | month = mon + 10; |
| 416 | year--; |
| 417 | } |
| 418 | |
| 419 | // now we can simply add all the contributions together |
| 420 | return ((year / 100) * DAYS_PER_400_YEARS) / 4 |
| 421 | + ((year % 100) * DAYS_PER_4_YEARS) / 4 |
| 422 | + (month * DAYS_PER_5_MONTHS + 2) / 5 |
| 423 | + day |
| 424 | - JDN_OFFSET; |
| 425 | } |
| 426 | |
| 427 | #ifdef wxHAS_STRFTIME |
| 428 | |
| 429 | // this function is a wrapper around strftime(3) adding error checking |
| 430 | // NOTE: not static because used by datetimefmt.cpp |
| 431 | wxString CallStrftime(const wxString& format, const tm* tm) |
| 432 | { |
| 433 | wxChar buf[4096]; |
| 434 | // Create temp wxString here to work around mingw/cygwin bug 1046059 |
| 435 | // http://sourceforge.net/tracker/?func=detail&atid=102435&aid=1046059&group_id=2435 |
| 436 | wxString s; |
| 437 | |
| 438 | if ( !wxStrftime(buf, WXSIZEOF(buf), format, tm) ) |
| 439 | { |
| 440 | // if the format is valid, buffer must be too small? |
| 441 | wxFAIL_MSG(wxT("strftime() failed")); |
| 442 | |
| 443 | buf[0] = '\0'; |
| 444 | } |
| 445 | |
| 446 | s = buf; |
| 447 | return s; |
| 448 | } |
| 449 | |
| 450 | #endif // wxHAS_STRFTIME |
| 451 | |
| 452 | // if year and/or month have invalid values, replace them with the current ones |
| 453 | static void ReplaceDefaultYearMonthWithCurrent(int *year, |
| 454 | wxDateTime::Month *month) |
| 455 | { |
| 456 | struct tm *tmNow = NULL; |
| 457 | struct tm tmstruct; |
| 458 | |
| 459 | if ( *year == wxDateTime::Inv_Year ) |
| 460 | { |
| 461 | tmNow = wxDateTime::GetTmNow(&tmstruct); |
| 462 | |
| 463 | *year = 1900 + tmNow->tm_year; |
| 464 | } |
| 465 | |
| 466 | if ( *month == wxDateTime::Inv_Month ) |
| 467 | { |
| 468 | if ( !tmNow ) |
| 469 | tmNow = wxDateTime::GetTmNow(&tmstruct); |
| 470 | |
| 471 | *month = (wxDateTime::Month)tmNow->tm_mon; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | // fill the struct tm with default values |
| 476 | // NOTE: not static because used by datetimefmt.cpp |
| 477 | void InitTm(struct tm& tm) |
| 478 | { |
| 479 | // struct tm may have etxra fields (undocumented and with unportable |
| 480 | // names) which, nevertheless, must be set to 0 |
| 481 | memset(&tm, 0, sizeof(struct tm)); |
| 482 | |
| 483 | tm.tm_mday = 1; // mday 0 is invalid |
| 484 | tm.tm_year = 76; // any valid year |
| 485 | tm.tm_isdst = -1; // auto determine |
| 486 | } |
| 487 | |
| 488 | // ============================================================================ |
| 489 | // implementation of wxDateTime |
| 490 | // ============================================================================ |
| 491 | |
| 492 | // ---------------------------------------------------------------------------- |
| 493 | // struct Tm |
| 494 | // ---------------------------------------------------------------------------- |
| 495 | |
| 496 | wxDateTime::Tm::Tm() |
| 497 | { |
| 498 | year = (wxDateTime_t)wxDateTime::Inv_Year; |
| 499 | mon = wxDateTime::Inv_Month; |
| 500 | mday = |
| 501 | yday = 0; |
| 502 | hour = |
| 503 | min = |
| 504 | sec = |
| 505 | msec = 0; |
| 506 | wday = wxDateTime::Inv_WeekDay; |
| 507 | } |
| 508 | |
| 509 | wxDateTime::Tm::Tm(const struct tm& tm, const TimeZone& tz) |
| 510 | : m_tz(tz) |
| 511 | { |
| 512 | msec = 0; |
| 513 | sec = (wxDateTime::wxDateTime_t)tm.tm_sec; |
| 514 | min = (wxDateTime::wxDateTime_t)tm.tm_min; |
| 515 | hour = (wxDateTime::wxDateTime_t)tm.tm_hour; |
| 516 | mday = (wxDateTime::wxDateTime_t)tm.tm_mday; |
| 517 | mon = (wxDateTime::Month)tm.tm_mon; |
| 518 | year = 1900 + tm.tm_year; |
| 519 | wday = (wxDateTime::wxDateTime_t)tm.tm_wday; |
| 520 | yday = (wxDateTime::wxDateTime_t)tm.tm_yday; |
| 521 | } |
| 522 | |
| 523 | bool wxDateTime::Tm::IsValid() const |
| 524 | { |
| 525 | if ( mon == wxDateTime::Inv_Month ) |
| 526 | return false; |
| 527 | |
| 528 | // We need to check this here to avoid crashing in GetNumOfDaysInMonth() if |
| 529 | // somebody passed us "(wxDateTime::Month)1000". |
| 530 | wxCHECK_MSG( mon >= wxDateTime::Jan && mon < wxDateTime::Inv_Month, false, |
| 531 | wxS("Invalid month value") ); |
| 532 | |
| 533 | // we allow for the leap seconds, although we don't use them (yet) |
| 534 | return (year != wxDateTime::Inv_Year) && (mon != wxDateTime::Inv_Month) && |
| 535 | (mday > 0 && mday <= GetNumOfDaysInMonth(year, mon)) && |
| 536 | (hour < 24) && (min < 60) && (sec < 62) && (msec < 1000); |
| 537 | } |
| 538 | |
| 539 | void wxDateTime::Tm::ComputeWeekDay() |
| 540 | { |
| 541 | // compute the week day from day/month/year: we use the dumbest algorithm |
| 542 | // possible: just compute our JDN and then use the (simple to derive) |
| 543 | // formula: weekday = (JDN + 1.5) % 7 |
| 544 | wday = (wxDateTime::wxDateTime_t)((GetTruncatedJDN(mday, mon, year) + 2) % 7); |
| 545 | } |
| 546 | |
| 547 | void wxDateTime::Tm::AddMonths(int monDiff) |
| 548 | { |
| 549 | // normalize the months field |
| 550 | while ( monDiff < -mon ) |
| 551 | { |
| 552 | year--; |
| 553 | |
| 554 | monDiff += MONTHS_IN_YEAR; |
| 555 | } |
| 556 | |
| 557 | while ( monDiff + mon >= MONTHS_IN_YEAR ) |
| 558 | { |
| 559 | year++; |
| 560 | |
| 561 | monDiff -= MONTHS_IN_YEAR; |
| 562 | } |
| 563 | |
| 564 | mon = (wxDateTime::Month)(mon + monDiff); |
| 565 | |
| 566 | wxASSERT_MSG( mon >= 0 && mon < MONTHS_IN_YEAR, wxT("logic error") ); |
| 567 | |
| 568 | // NB: we don't check here that the resulting date is valid, this function |
| 569 | // is private and the caller must check it if needed |
| 570 | } |
| 571 | |
| 572 | void wxDateTime::Tm::AddDays(int dayDiff) |
| 573 | { |
| 574 | // normalize the days field |
| 575 | while ( dayDiff + mday < 1 ) |
| 576 | { |
| 577 | AddMonths(-1); |
| 578 | |
| 579 | dayDiff += GetNumOfDaysInMonth(year, mon); |
| 580 | } |
| 581 | |
| 582 | mday = (wxDateTime::wxDateTime_t)( mday + dayDiff ); |
| 583 | while ( mday > GetNumOfDaysInMonth(year, mon) ) |
| 584 | { |
| 585 | mday -= GetNumOfDaysInMonth(year, mon); |
| 586 | |
| 587 | AddMonths(1); |
| 588 | } |
| 589 | |
| 590 | wxASSERT_MSG( mday > 0 && mday <= GetNumOfDaysInMonth(year, mon), |
| 591 | wxT("logic error") ); |
| 592 | } |
| 593 | |
| 594 | // ---------------------------------------------------------------------------- |
| 595 | // class TimeZone |
| 596 | // ---------------------------------------------------------------------------- |
| 597 | |
| 598 | wxDateTime::TimeZone::TimeZone(wxDateTime::TZ tz) |
| 599 | { |
| 600 | switch ( tz ) |
| 601 | { |
| 602 | case wxDateTime::Local: |
| 603 | // get the offset from C RTL: it returns the difference GMT-local |
| 604 | // while we want to have the offset _from_ GMT, hence the '-' |
| 605 | m_offset = -GetTimeZone(); |
| 606 | break; |
| 607 | |
| 608 | case wxDateTime::GMT_12: |
| 609 | case wxDateTime::GMT_11: |
| 610 | case wxDateTime::GMT_10: |
| 611 | case wxDateTime::GMT_9: |
| 612 | case wxDateTime::GMT_8: |
| 613 | case wxDateTime::GMT_7: |
| 614 | case wxDateTime::GMT_6: |
| 615 | case wxDateTime::GMT_5: |
| 616 | case wxDateTime::GMT_4: |
| 617 | case wxDateTime::GMT_3: |
| 618 | case wxDateTime::GMT_2: |
| 619 | case wxDateTime::GMT_1: |
| 620 | m_offset = -3600*(wxDateTime::GMT0 - tz); |
| 621 | break; |
| 622 | |
| 623 | case wxDateTime::GMT0: |
| 624 | case wxDateTime::GMT1: |
| 625 | case wxDateTime::GMT2: |
| 626 | case wxDateTime::GMT3: |
| 627 | case wxDateTime::GMT4: |
| 628 | case wxDateTime::GMT5: |
| 629 | case wxDateTime::GMT6: |
| 630 | case wxDateTime::GMT7: |
| 631 | case wxDateTime::GMT8: |
| 632 | case wxDateTime::GMT9: |
| 633 | case wxDateTime::GMT10: |
| 634 | case wxDateTime::GMT11: |
| 635 | case wxDateTime::GMT12: |
| 636 | case wxDateTime::GMT13: |
| 637 | m_offset = 3600*(tz - wxDateTime::GMT0); |
| 638 | break; |
| 639 | |
| 640 | case wxDateTime::A_CST: |
| 641 | // Central Standard Time in use in Australia = UTC + 9.5 |
| 642 | m_offset = 60l*(9*MIN_PER_HOUR + MIN_PER_HOUR/2); |
| 643 | break; |
| 644 | |
| 645 | default: |
| 646 | wxFAIL_MSG( wxT("unknown time zone") ); |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | // ---------------------------------------------------------------------------- |
| 651 | // static functions |
| 652 | // ---------------------------------------------------------------------------- |
| 653 | |
| 654 | /* static */ |
| 655 | struct tm *wxDateTime::GetTmNow(struct tm *tmstruct) |
| 656 | { |
| 657 | time_t t = GetTimeNow(); |
| 658 | return wxLocaltime_r(&t, tmstruct); |
| 659 | } |
| 660 | |
| 661 | /* static */ |
| 662 | bool wxDateTime::IsLeapYear(int year, wxDateTime::Calendar cal) |
| 663 | { |
| 664 | if ( year == Inv_Year ) |
| 665 | year = GetCurrentYear(); |
| 666 | |
| 667 | if ( cal == Gregorian ) |
| 668 | { |
| 669 | // in Gregorian calendar leap years are those divisible by 4 except |
| 670 | // those divisible by 100 unless they're also divisible by 400 |
| 671 | // (in some countries, like Russia and Greece, additional corrections |
| 672 | // exist, but they won't manifest themselves until 2700) |
| 673 | return (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)); |
| 674 | } |
| 675 | else if ( cal == Julian ) |
| 676 | { |
| 677 | // in Julian calendar the rule is simpler |
| 678 | return year % 4 == 0; |
| 679 | } |
| 680 | else |
| 681 | { |
| 682 | wxFAIL_MSG(wxT("unknown calendar")); |
| 683 | |
| 684 | return false; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | /* static */ |
| 689 | int wxDateTime::GetCentury(int year) |
| 690 | { |
| 691 | return year > 0 ? year / 100 : year / 100 - 1; |
| 692 | } |
| 693 | |
| 694 | /* static */ |
| 695 | int wxDateTime::ConvertYearToBC(int year) |
| 696 | { |
| 697 | // year 0 is BC 1 |
| 698 | return year > 0 ? year : year - 1; |
| 699 | } |
| 700 | |
| 701 | /* static */ |
| 702 | int wxDateTime::GetCurrentYear(wxDateTime::Calendar cal) |
| 703 | { |
| 704 | switch ( cal ) |
| 705 | { |
| 706 | case Gregorian: |
| 707 | return Now().GetYear(); |
| 708 | |
| 709 | case Julian: |
| 710 | wxFAIL_MSG(wxT("TODO")); |
| 711 | break; |
| 712 | |
| 713 | default: |
| 714 | wxFAIL_MSG(wxT("unsupported calendar")); |
| 715 | break; |
| 716 | } |
| 717 | |
| 718 | return Inv_Year; |
| 719 | } |
| 720 | |
| 721 | /* static */ |
| 722 | wxDateTime::Month wxDateTime::GetCurrentMonth(wxDateTime::Calendar cal) |
| 723 | { |
| 724 | switch ( cal ) |
| 725 | { |
| 726 | case Gregorian: |
| 727 | return Now().GetMonth(); |
| 728 | |
| 729 | case Julian: |
| 730 | wxFAIL_MSG(wxT("TODO")); |
| 731 | break; |
| 732 | |
| 733 | default: |
| 734 | wxFAIL_MSG(wxT("unsupported calendar")); |
| 735 | break; |
| 736 | } |
| 737 | |
| 738 | return Inv_Month; |
| 739 | } |
| 740 | |
| 741 | /* static */ |
| 742 | wxDateTime::wxDateTime_t wxDateTime::GetNumberOfDays(int year, Calendar cal) |
| 743 | { |
| 744 | if ( year == Inv_Year ) |
| 745 | { |
| 746 | // take the current year if none given |
| 747 | year = GetCurrentYear(); |
| 748 | } |
| 749 | |
| 750 | switch ( cal ) |
| 751 | { |
| 752 | case Gregorian: |
| 753 | case Julian: |
| 754 | return IsLeapYear(year) ? 366 : 365; |
| 755 | |
| 756 | default: |
| 757 | wxFAIL_MSG(wxT("unsupported calendar")); |
| 758 | break; |
| 759 | } |
| 760 | |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | /* static */ |
| 765 | wxDateTime::wxDateTime_t wxDateTime::GetNumberOfDays(wxDateTime::Month month, |
| 766 | int year, |
| 767 | wxDateTime::Calendar cal) |
| 768 | { |
| 769 | wxCHECK_MSG( month < MONTHS_IN_YEAR, 0, wxT("invalid month") ); |
| 770 | |
| 771 | if ( cal == Gregorian || cal == Julian ) |
| 772 | { |
| 773 | if ( year == Inv_Year ) |
| 774 | { |
| 775 | // take the current year if none given |
| 776 | year = GetCurrentYear(); |
| 777 | } |
| 778 | |
| 779 | return GetNumOfDaysInMonth(year, month); |
| 780 | } |
| 781 | else |
| 782 | { |
| 783 | wxFAIL_MSG(wxT("unsupported calendar")); |
| 784 | |
| 785 | return 0; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | namespace |
| 790 | { |
| 791 | |
| 792 | // helper function used by GetEnglish/WeekDayName(): returns 0 if flags is |
| 793 | // Name_Full and 1 if it is Name_Abbr or -1 if the flags is incorrect (and |
| 794 | // asserts in this case) |
| 795 | // |
| 796 | // the return value of this function is used as an index into 2D array |
| 797 | // containing full names in its first row and abbreviated ones in the 2nd one |
| 798 | int NameArrayIndexFromFlag(wxDateTime::NameFlags flags) |
| 799 | { |
| 800 | switch ( flags ) |
| 801 | { |
| 802 | case wxDateTime::Name_Full: |
| 803 | return 0; |
| 804 | |
| 805 | case wxDateTime::Name_Abbr: |
| 806 | return 1; |
| 807 | |
| 808 | default: |
| 809 | wxFAIL_MSG( "unknown wxDateTime::NameFlags value" ); |
| 810 | } |
| 811 | |
| 812 | return -1; |
| 813 | } |
| 814 | |
| 815 | } // anonymous namespace |
| 816 | |
| 817 | /* static */ |
| 818 | wxString wxDateTime::GetEnglishMonthName(Month month, NameFlags flags) |
| 819 | { |
| 820 | wxCHECK_MSG( month != Inv_Month, wxEmptyString, "invalid month" ); |
| 821 | |
| 822 | static const char *const monthNames[2][MONTHS_IN_YEAR] = |
| 823 | { |
| 824 | { "January", "February", "March", "April", "May", "June", |
| 825 | "July", "August", "September", "October", "November", "December" }, |
| 826 | { "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 827 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" } |
| 828 | }; |
| 829 | |
| 830 | const int idx = NameArrayIndexFromFlag(flags); |
| 831 | if ( idx == -1 ) |
| 832 | return wxString(); |
| 833 | |
| 834 | return monthNames[idx][month]; |
| 835 | } |
| 836 | |
| 837 | /* static */ |
| 838 | wxString wxDateTime::GetMonthName(wxDateTime::Month month, |
| 839 | wxDateTime::NameFlags flags) |
| 840 | { |
| 841 | #ifdef wxHAS_STRFTIME |
| 842 | wxCHECK_MSG( month != Inv_Month, wxEmptyString, wxT("invalid month") ); |
| 843 | |
| 844 | // notice that we must set all the fields to avoid confusing libc (GNU one |
| 845 | // gets confused to a crash if we don't do this) |
| 846 | tm tm; |
| 847 | InitTm(tm); |
| 848 | tm.tm_mon = month; |
| 849 | |
| 850 | return CallStrftime(flags == Name_Abbr ? wxT("%b") : wxT("%B"), &tm); |
| 851 | #else // !wxHAS_STRFTIME |
| 852 | return GetEnglishMonthName(month, flags); |
| 853 | #endif // wxHAS_STRFTIME/!wxHAS_STRFTIME |
| 854 | } |
| 855 | |
| 856 | /* static */ |
| 857 | wxString wxDateTime::GetEnglishWeekDayName(WeekDay wday, NameFlags flags) |
| 858 | { |
| 859 | wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, wxT("invalid weekday") ); |
| 860 | |
| 861 | static const char *const weekdayNames[2][DAYS_PER_WEEK] = |
| 862 | { |
| 863 | { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", |
| 864 | "Saturday" }, |
| 865 | { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }, |
| 866 | }; |
| 867 | |
| 868 | const int idx = NameArrayIndexFromFlag(flags); |
| 869 | if ( idx == -1 ) |
| 870 | return wxString(); |
| 871 | |
| 872 | return weekdayNames[idx][wday]; |
| 873 | } |
| 874 | |
| 875 | /* static */ |
| 876 | wxString wxDateTime::GetWeekDayName(wxDateTime::WeekDay wday, |
| 877 | wxDateTime::NameFlags flags) |
| 878 | { |
| 879 | #ifdef wxHAS_STRFTIME |
| 880 | wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, wxT("invalid weekday") ); |
| 881 | |
| 882 | // take some arbitrary Sunday (but notice that the day should be such that |
| 883 | // after adding wday to it below we still have a valid date, e.g. don't |
| 884 | // take 28 here!) |
| 885 | tm tm; |
| 886 | InitTm(tm); |
| 887 | tm.tm_mday = 21; |
| 888 | tm.tm_mon = Nov; |
| 889 | tm.tm_year = 99; |
| 890 | |
| 891 | // and offset it by the number of days needed to get the correct wday |
| 892 | tm.tm_mday += wday; |
| 893 | |
| 894 | // call mktime() to normalize it... |
| 895 | (void)mktime(&tm); |
| 896 | |
| 897 | // ... and call strftime() |
| 898 | return CallStrftime(flags == Name_Abbr ? wxT("%a") : wxT("%A"), &tm); |
| 899 | #else // !wxHAS_STRFTIME |
| 900 | return GetEnglishWeekDayName(wday, flags); |
| 901 | #endif // wxHAS_STRFTIME/!wxHAS_STRFTIME |
| 902 | } |
| 903 | |
| 904 | /* static */ |
| 905 | void wxDateTime::GetAmPmStrings(wxString *am, wxString *pm) |
| 906 | { |
| 907 | tm tm; |
| 908 | InitTm(tm); |
| 909 | wxChar buffer[64]; |
| 910 | // @Note: Do not call 'CallStrftime' here! CallStrftime checks the return code |
| 911 | // and causes an assertion failed if the buffer is to small (which is good) - OR - |
| 912 | // if strftime does not return anything because the format string is invalid - OR - |
| 913 | // if there are no 'am' / 'pm' tokens defined for the current locale (which is not good). |
| 914 | // wxDateTime::ParseTime will try several different formats to parse the time. |
| 915 | // As a result, GetAmPmStrings might get called, even if the current locale |
| 916 | // does not define any 'am' / 'pm' tokens. In this case, wxStrftime would |
| 917 | // assert, even though it is a perfectly legal use. |
| 918 | if ( am ) |
| 919 | { |
| 920 | if (wxStrftime(buffer, WXSIZEOF(buffer), wxT("%p"), &tm) > 0) |
| 921 | *am = wxString(buffer); |
| 922 | else |
| 923 | *am = wxString(); |
| 924 | } |
| 925 | if ( pm ) |
| 926 | { |
| 927 | tm.tm_hour = 13; |
| 928 | if (wxStrftime(buffer, WXSIZEOF(buffer), wxT("%p"), &tm) > 0) |
| 929 | *pm = wxString(buffer); |
| 930 | else |
| 931 | *pm = wxString(); |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | |
| 936 | // ---------------------------------------------------------------------------- |
| 937 | // Country stuff: date calculations depend on the country (DST, work days, |
| 938 | // ...), so we need to know which rules to follow. |
| 939 | // ---------------------------------------------------------------------------- |
| 940 | |
| 941 | /* static */ |
| 942 | wxDateTime::Country wxDateTime::GetCountry() |
| 943 | { |
| 944 | // TODO use LOCALE_ICOUNTRY setting under Win32 |
| 945 | #ifndef __WXWINCE__ |
| 946 | if ( ms_country == Country_Unknown ) |
| 947 | { |
| 948 | // try to guess from the time zone name |
| 949 | time_t t = time(NULL); |
| 950 | struct tm tmstruct; |
| 951 | struct tm *tm = wxLocaltime_r(&t, &tmstruct); |
| 952 | |
| 953 | wxString tz = CallStrftime(wxT("%Z"), tm); |
| 954 | if ( tz == wxT("WET") || tz == wxT("WEST") ) |
| 955 | { |
| 956 | ms_country = UK; |
| 957 | } |
| 958 | else if ( tz == wxT("CET") || tz == wxT("CEST") ) |
| 959 | { |
| 960 | ms_country = Country_EEC; |
| 961 | } |
| 962 | else if ( tz == wxT("MSK") || tz == wxT("MSD") ) |
| 963 | { |
| 964 | ms_country = Russia; |
| 965 | } |
| 966 | else if ( tz == wxT("AST") || tz == wxT("ADT") || |
| 967 | tz == wxT("EST") || tz == wxT("EDT") || |
| 968 | tz == wxT("CST") || tz == wxT("CDT") || |
| 969 | tz == wxT("MST") || tz == wxT("MDT") || |
| 970 | tz == wxT("PST") || tz == wxT("PDT") ) |
| 971 | { |
| 972 | ms_country = USA; |
| 973 | } |
| 974 | else |
| 975 | { |
| 976 | // well, choose a default one |
| 977 | ms_country = USA; |
| 978 | } |
| 979 | } |
| 980 | #else // __WXWINCE__ |
| 981 | ms_country = USA; |
| 982 | #endif // !__WXWINCE__/__WXWINCE__ |
| 983 | |
| 984 | return ms_country; |
| 985 | } |
| 986 | |
| 987 | /* static */ |
| 988 | void wxDateTime::SetCountry(wxDateTime::Country country) |
| 989 | { |
| 990 | ms_country = country; |
| 991 | } |
| 992 | |
| 993 | /* static */ |
| 994 | bool wxDateTime::IsWestEuropeanCountry(Country country) |
| 995 | { |
| 996 | if ( country == Country_Default ) |
| 997 | { |
| 998 | country = GetCountry(); |
| 999 | } |
| 1000 | |
| 1001 | return (Country_WesternEurope_Start <= country) && |
| 1002 | (country <= Country_WesternEurope_End); |
| 1003 | } |
| 1004 | |
| 1005 | // ---------------------------------------------------------------------------- |
| 1006 | // DST calculations: we use 3 different rules for the West European countries, |
| 1007 | // USA and for the rest of the world. This is undoubtedly false for many |
| 1008 | // countries, but I lack the necessary info (and the time to gather it), |
| 1009 | // please add the other rules here! |
| 1010 | // ---------------------------------------------------------------------------- |
| 1011 | |
| 1012 | /* static */ |
| 1013 | bool wxDateTime::IsDSTApplicable(int year, Country country) |
| 1014 | { |
| 1015 | if ( year == Inv_Year ) |
| 1016 | { |
| 1017 | // take the current year if none given |
| 1018 | year = GetCurrentYear(); |
| 1019 | } |
| 1020 | |
| 1021 | if ( country == Country_Default ) |
| 1022 | { |
| 1023 | country = GetCountry(); |
| 1024 | } |
| 1025 | |
| 1026 | switch ( country ) |
| 1027 | { |
| 1028 | case USA: |
| 1029 | case UK: |
| 1030 | // DST was first observed in the US and UK during WWI, reused |
| 1031 | // during WWII and used again since 1966 |
| 1032 | return year >= 1966 || |
| 1033 | (year >= 1942 && year <= 1945) || |
| 1034 | (year == 1918 || year == 1919); |
| 1035 | |
| 1036 | default: |
| 1037 | // assume that it started after WWII |
| 1038 | return year > 1950; |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | /* static */ |
| 1043 | wxDateTime wxDateTime::GetBeginDST(int year, Country country) |
| 1044 | { |
| 1045 | if ( year == Inv_Year ) |
| 1046 | { |
| 1047 | // take the current year if none given |
| 1048 | year = GetCurrentYear(); |
| 1049 | } |
| 1050 | |
| 1051 | if ( country == Country_Default ) |
| 1052 | { |
| 1053 | country = GetCountry(); |
| 1054 | } |
| 1055 | |
| 1056 | if ( !IsDSTApplicable(year, country) ) |
| 1057 | { |
| 1058 | return wxInvalidDateTime; |
| 1059 | } |
| 1060 | |
| 1061 | wxDateTime dt; |
| 1062 | |
| 1063 | if ( IsWestEuropeanCountry(country) || (country == Russia) ) |
| 1064 | { |
| 1065 | // DST begins at 1 a.m. GMT on the last Sunday of March |
| 1066 | if ( !dt.SetToLastWeekDay(Sun, Mar, year) ) |
| 1067 | { |
| 1068 | // weird... |
| 1069 | wxFAIL_MSG( wxT("no last Sunday in March?") ); |
| 1070 | } |
| 1071 | |
| 1072 | dt += wxTimeSpan::Hours(1); |
| 1073 | } |
| 1074 | else switch ( country ) |
| 1075 | { |
| 1076 | case USA: |
| 1077 | switch ( year ) |
| 1078 | { |
| 1079 | case 1918: |
| 1080 | case 1919: |
| 1081 | // don't know for sure - assume it was in effect all year |
| 1082 | |
| 1083 | case 1943: |
| 1084 | case 1944: |
| 1085 | case 1945: |
| 1086 | dt.Set(1, Jan, year); |
| 1087 | break; |
| 1088 | |
| 1089 | case 1942: |
| 1090 | // DST was installed Feb 2, 1942 by the Congress |
| 1091 | dt.Set(2, Feb, year); |
| 1092 | break; |
| 1093 | |
| 1094 | // Oil embargo changed the DST period in the US |
| 1095 | case 1974: |
| 1096 | dt.Set(6, Jan, 1974); |
| 1097 | break; |
| 1098 | |
| 1099 | case 1975: |
| 1100 | dt.Set(23, Feb, 1975); |
| 1101 | break; |
| 1102 | |
| 1103 | default: |
| 1104 | // before 1986, DST begun on the last Sunday of April, but |
| 1105 | // in 1986 Reagan changed it to begin at 2 a.m. of the |
| 1106 | // first Sunday in April |
| 1107 | if ( year < 1986 ) |
| 1108 | { |
| 1109 | if ( !dt.SetToLastWeekDay(Sun, Apr, year) ) |
| 1110 | { |
| 1111 | // weird... |
| 1112 | wxFAIL_MSG( wxT("no first Sunday in April?") ); |
| 1113 | } |
| 1114 | } |
| 1115 | else if ( year > 2006 ) |
| 1116 | // Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005). |
| 1117 | // Starting in 2007, daylight time begins in the United States on the |
| 1118 | // second Sunday in March and ends on the first Sunday in November |
| 1119 | { |
| 1120 | if ( !dt.SetToWeekDay(Sun, 2, Mar, year) ) |
| 1121 | { |
| 1122 | // weird... |
| 1123 | wxFAIL_MSG( wxT("no second Sunday in March?") ); |
| 1124 | } |
| 1125 | } |
| 1126 | else |
| 1127 | { |
| 1128 | if ( !dt.SetToWeekDay(Sun, 1, Apr, year) ) |
| 1129 | { |
| 1130 | // weird... |
| 1131 | wxFAIL_MSG( wxT("no first Sunday in April?") ); |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | dt += wxTimeSpan::Hours(2); |
| 1136 | |
| 1137 | // TODO what about timezone?? |
| 1138 | } |
| 1139 | |
| 1140 | break; |
| 1141 | |
| 1142 | default: |
| 1143 | // assume Mar 30 as the start of the DST for the rest of the world |
| 1144 | // - totally bogus, of course |
| 1145 | dt.Set(30, Mar, year); |
| 1146 | } |
| 1147 | |
| 1148 | return dt; |
| 1149 | } |
| 1150 | |
| 1151 | /* static */ |
| 1152 | wxDateTime wxDateTime::GetEndDST(int year, Country country) |
| 1153 | { |
| 1154 | if ( year == Inv_Year ) |
| 1155 | { |
| 1156 | // take the current year if none given |
| 1157 | year = GetCurrentYear(); |
| 1158 | } |
| 1159 | |
| 1160 | if ( country == Country_Default ) |
| 1161 | { |
| 1162 | country = GetCountry(); |
| 1163 | } |
| 1164 | |
| 1165 | if ( !IsDSTApplicable(year, country) ) |
| 1166 | { |
| 1167 | return wxInvalidDateTime; |
| 1168 | } |
| 1169 | |
| 1170 | wxDateTime dt; |
| 1171 | |
| 1172 | if ( IsWestEuropeanCountry(country) || (country == Russia) ) |
| 1173 | { |
| 1174 | // DST ends at 1 a.m. GMT on the last Sunday of October |
| 1175 | if ( !dt.SetToLastWeekDay(Sun, Oct, year) ) |
| 1176 | { |
| 1177 | // weirder and weirder... |
| 1178 | wxFAIL_MSG( wxT("no last Sunday in October?") ); |
| 1179 | } |
| 1180 | |
| 1181 | dt += wxTimeSpan::Hours(1); |
| 1182 | } |
| 1183 | else switch ( country ) |
| 1184 | { |
| 1185 | case USA: |
| 1186 | switch ( year ) |
| 1187 | { |
| 1188 | case 1918: |
| 1189 | case 1919: |
| 1190 | // don't know for sure - assume it was in effect all year |
| 1191 | |
| 1192 | case 1943: |
| 1193 | case 1944: |
| 1194 | dt.Set(31, Dec, year); |
| 1195 | break; |
| 1196 | |
| 1197 | case 1945: |
| 1198 | // the time was reset after the end of the WWII |
| 1199 | dt.Set(30, Sep, year); |
| 1200 | break; |
| 1201 | |
| 1202 | default: // default for switch (year) |
| 1203 | if ( year > 2006 ) |
| 1204 | // Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005). |
| 1205 | // Starting in 2007, daylight time begins in the United States on the |
| 1206 | // second Sunday in March and ends on the first Sunday in November |
| 1207 | { |
| 1208 | if ( !dt.SetToWeekDay(Sun, 1, Nov, year) ) |
| 1209 | { |
| 1210 | // weird... |
| 1211 | wxFAIL_MSG( wxT("no first Sunday in November?") ); |
| 1212 | } |
| 1213 | } |
| 1214 | else |
| 1215 | // pre-2007 |
| 1216 | // DST ends at 2 a.m. on the last Sunday of October |
| 1217 | { |
| 1218 | if ( !dt.SetToLastWeekDay(Sun, Oct, year) ) |
| 1219 | { |
| 1220 | // weirder and weirder... |
| 1221 | wxFAIL_MSG( wxT("no last Sunday in October?") ); |
| 1222 | } |
| 1223 | } |
| 1224 | |
| 1225 | dt += wxTimeSpan::Hours(2); |
| 1226 | |
| 1227 | // TODO: what about timezone?? |
| 1228 | } |
| 1229 | break; |
| 1230 | |
| 1231 | default: // default for switch (country) |
| 1232 | // assume October 26th as the end of the DST - totally bogus too |
| 1233 | dt.Set(26, Oct, year); |
| 1234 | } |
| 1235 | |
| 1236 | return dt; |
| 1237 | } |
| 1238 | |
| 1239 | // ---------------------------------------------------------------------------- |
| 1240 | // constructors and assignment operators |
| 1241 | // ---------------------------------------------------------------------------- |
| 1242 | |
| 1243 | // return the current time with ms precision |
| 1244 | /* static */ wxDateTime wxDateTime::UNow() |
| 1245 | { |
| 1246 | return wxDateTime(wxGetLocalTimeMillis()); |
| 1247 | } |
| 1248 | |
| 1249 | // the values in the tm structure contain the local time |
| 1250 | wxDateTime& wxDateTime::Set(const struct tm& tm) |
| 1251 | { |
| 1252 | struct tm tm2(tm); |
| 1253 | time_t timet = mktime(&tm2); |
| 1254 | |
| 1255 | if ( timet == (time_t)-1 ) |
| 1256 | { |
| 1257 | // mktime() rather unintuitively fails for Jan 1, 1970 if the hour is |
| 1258 | // less than timezone - try to make it work for this case |
| 1259 | if ( tm2.tm_year == 70 && tm2.tm_mon == 0 && tm2.tm_mday == 1 ) |
| 1260 | { |
| 1261 | return Set((time_t)( |
| 1262 | GetTimeZone() + |
| 1263 | tm2.tm_hour * MIN_PER_HOUR * SEC_PER_MIN + |
| 1264 | tm2.tm_min * SEC_PER_MIN + |
| 1265 | tm2.tm_sec)); |
| 1266 | } |
| 1267 | |
| 1268 | wxFAIL_MSG( wxT("mktime() failed") ); |
| 1269 | |
| 1270 | *this = wxInvalidDateTime; |
| 1271 | |
| 1272 | return *this; |
| 1273 | } |
| 1274 | else |
| 1275 | { |
| 1276 | return Set(timet); |
| 1277 | } |
| 1278 | } |
| 1279 | |
| 1280 | wxDateTime& wxDateTime::Set(wxDateTime_t hour, |
| 1281 | wxDateTime_t minute, |
| 1282 | wxDateTime_t second, |
| 1283 | wxDateTime_t millisec) |
| 1284 | { |
| 1285 | // we allow seconds to be 61 to account for the leap seconds, even if we |
| 1286 | // don't use them really |
| 1287 | wxDATETIME_CHECK( hour < 24 && |
| 1288 | second < 62 && |
| 1289 | minute < 60 && |
| 1290 | millisec < 1000, |
| 1291 | wxT("Invalid time in wxDateTime::Set()") ); |
| 1292 | |
| 1293 | // get the current date from system |
| 1294 | struct tm tmstruct; |
| 1295 | struct tm *tm = GetTmNow(&tmstruct); |
| 1296 | |
| 1297 | wxDATETIME_CHECK( tm, wxT("wxLocaltime_r() failed") ); |
| 1298 | |
| 1299 | // make a copy so it isn't clobbered by the call to mktime() below |
| 1300 | struct tm tm1(*tm); |
| 1301 | |
| 1302 | // adjust the time |
| 1303 | tm1.tm_hour = hour; |
| 1304 | tm1.tm_min = minute; |
| 1305 | tm1.tm_sec = second; |
| 1306 | |
| 1307 | // and the DST in case it changes on this date |
| 1308 | struct tm tm2(tm1); |
| 1309 | mktime(&tm2); |
| 1310 | if ( tm2.tm_isdst != tm1.tm_isdst ) |
| 1311 | tm1.tm_isdst = tm2.tm_isdst; |
| 1312 | |
| 1313 | (void)Set(tm1); |
| 1314 | |
| 1315 | // and finally adjust milliseconds |
| 1316 | return SetMillisecond(millisec); |
| 1317 | } |
| 1318 | |
| 1319 | wxDateTime& wxDateTime::Set(wxDateTime_t day, |
| 1320 | Month month, |
| 1321 | int year, |
| 1322 | wxDateTime_t hour, |
| 1323 | wxDateTime_t minute, |
| 1324 | wxDateTime_t second, |
| 1325 | wxDateTime_t millisec) |
| 1326 | { |
| 1327 | wxDATETIME_CHECK( hour < 24 && |
| 1328 | second < 62 && |
| 1329 | minute < 60 && |
| 1330 | millisec < 1000, |
| 1331 | wxT("Invalid time in wxDateTime::Set()") ); |
| 1332 | |
| 1333 | ReplaceDefaultYearMonthWithCurrent(&year, &month); |
| 1334 | |
| 1335 | wxDATETIME_CHECK( (0 < day) && (day <= GetNumberOfDays(month, year)), |
| 1336 | wxT("Invalid date in wxDateTime::Set()") ); |
| 1337 | |
| 1338 | // the range of time_t type (inclusive) |
| 1339 | static const int yearMinInRange = 1970; |
| 1340 | static const int yearMaxInRange = 2037; |
| 1341 | |
| 1342 | // test only the year instead of testing for the exact end of the Unix |
| 1343 | // time_t range - it doesn't bring anything to do more precise checks |
| 1344 | if ( year >= yearMinInRange && year <= yearMaxInRange ) |
| 1345 | { |
| 1346 | // use the standard library version if the date is in range - this is |
| 1347 | // probably more efficient than our code |
| 1348 | struct tm tm; |
| 1349 | tm.tm_year = year - 1900; |
| 1350 | tm.tm_mon = month; |
| 1351 | tm.tm_mday = day; |
| 1352 | tm.tm_hour = hour; |
| 1353 | tm.tm_min = minute; |
| 1354 | tm.tm_sec = second; |
| 1355 | tm.tm_isdst = -1; // mktime() will guess it |
| 1356 | |
| 1357 | (void)Set(tm); |
| 1358 | |
| 1359 | // and finally adjust milliseconds |
| 1360 | if (IsValid()) |
| 1361 | SetMillisecond(millisec); |
| 1362 | |
| 1363 | return *this; |
| 1364 | } |
| 1365 | else |
| 1366 | { |
| 1367 | // do time calculations ourselves: we want to calculate the number of |
| 1368 | // milliseconds between the given date and the epoch |
| 1369 | |
| 1370 | // get the JDN for the midnight of this day |
| 1371 | m_time = GetTruncatedJDN(day, month, year); |
| 1372 | m_time -= EPOCH_JDN; |
| 1373 | m_time *= SECONDS_PER_DAY * TIME_T_FACTOR; |
| 1374 | |
| 1375 | // JDN corresponds to GMT, we take localtime |
| 1376 | Add(wxTimeSpan(hour, minute, second + GetTimeZone(), millisec)); |
| 1377 | } |
| 1378 | |
| 1379 | return *this; |
| 1380 | } |
| 1381 | |
| 1382 | wxDateTime& wxDateTime::Set(double jdn) |
| 1383 | { |
| 1384 | // so that m_time will be 0 for the midnight of Jan 1, 1970 which is jdn |
| 1385 | // EPOCH_JDN + 0.5 |
| 1386 | jdn -= EPOCH_JDN + 0.5; |
| 1387 | |
| 1388 | m_time.Assign(jdn*MILLISECONDS_PER_DAY); |
| 1389 | |
| 1390 | // JDNs always are in UTC, so we don't need any adjustments for time zone |
| 1391 | |
| 1392 | return *this; |
| 1393 | } |
| 1394 | |
| 1395 | wxDateTime& wxDateTime::ResetTime() |
| 1396 | { |
| 1397 | Tm tm = GetTm(); |
| 1398 | |
| 1399 | if ( tm.hour || tm.min || tm.sec || tm.msec ) |
| 1400 | { |
| 1401 | tm.msec = |
| 1402 | tm.sec = |
| 1403 | tm.min = |
| 1404 | tm.hour = 0; |
| 1405 | |
| 1406 | Set(tm); |
| 1407 | } |
| 1408 | |
| 1409 | return *this; |
| 1410 | } |
| 1411 | |
| 1412 | wxDateTime wxDateTime::GetDateOnly() const |
| 1413 | { |
| 1414 | Tm tm = GetTm(); |
| 1415 | tm.msec = |
| 1416 | tm.sec = |
| 1417 | tm.min = |
| 1418 | tm.hour = 0; |
| 1419 | return wxDateTime(tm); |
| 1420 | } |
| 1421 | |
| 1422 | // ---------------------------------------------------------------------------- |
| 1423 | // DOS Date and Time Format functions |
| 1424 | // ---------------------------------------------------------------------------- |
| 1425 | // the dos date and time value is an unsigned 32 bit value in the format: |
| 1426 | // YYYYYYYMMMMDDDDDhhhhhmmmmmmsssss |
| 1427 | // |
| 1428 | // Y = year offset from 1980 (0-127) |
| 1429 | // M = month (1-12) |
| 1430 | // D = day of month (1-31) |
| 1431 | // h = hour (0-23) |
| 1432 | // m = minute (0-59) |
| 1433 | // s = bisecond (0-29) each bisecond indicates two seconds |
| 1434 | // ---------------------------------------------------------------------------- |
| 1435 | |
| 1436 | wxDateTime& wxDateTime::SetFromDOS(unsigned long ddt) |
| 1437 | { |
| 1438 | struct tm tm; |
| 1439 | InitTm(tm); |
| 1440 | |
| 1441 | long year = ddt & 0xFE000000; |
| 1442 | year >>= 25; |
| 1443 | year += 80; |
| 1444 | tm.tm_year = year; |
| 1445 | |
| 1446 | long month = ddt & 0x1E00000; |
| 1447 | month >>= 21; |
| 1448 | month -= 1; |
| 1449 | tm.tm_mon = month; |
| 1450 | |
| 1451 | long day = ddt & 0x1F0000; |
| 1452 | day >>= 16; |
| 1453 | tm.tm_mday = day; |
| 1454 | |
| 1455 | long hour = ddt & 0xF800; |
| 1456 | hour >>= 11; |
| 1457 | tm.tm_hour = hour; |
| 1458 | |
| 1459 | long minute = ddt & 0x7E0; |
| 1460 | minute >>= 5; |
| 1461 | tm.tm_min = minute; |
| 1462 | |
| 1463 | long second = ddt & 0x1F; |
| 1464 | tm.tm_sec = second * 2; |
| 1465 | |
| 1466 | return Set(mktime(&tm)); |
| 1467 | } |
| 1468 | |
| 1469 | unsigned long wxDateTime::GetAsDOS() const |
| 1470 | { |
| 1471 | unsigned long ddt; |
| 1472 | time_t ticks = GetTicks(); |
| 1473 | struct tm tmstruct; |
| 1474 | struct tm *tm = wxLocaltime_r(&ticks, &tmstruct); |
| 1475 | wxCHECK_MSG( tm, ULONG_MAX, wxT("time can't be represented in DOS format") ); |
| 1476 | |
| 1477 | long year = tm->tm_year; |
| 1478 | year -= 80; |
| 1479 | year <<= 25; |
| 1480 | |
| 1481 | long month = tm->tm_mon; |
| 1482 | month += 1; |
| 1483 | month <<= 21; |
| 1484 | |
| 1485 | long day = tm->tm_mday; |
| 1486 | day <<= 16; |
| 1487 | |
| 1488 | long hour = tm->tm_hour; |
| 1489 | hour <<= 11; |
| 1490 | |
| 1491 | long minute = tm->tm_min; |
| 1492 | minute <<= 5; |
| 1493 | |
| 1494 | long second = tm->tm_sec; |
| 1495 | second /= 2; |
| 1496 | |
| 1497 | ddt = year | month | day | hour | minute | second; |
| 1498 | return ddt; |
| 1499 | } |
| 1500 | |
| 1501 | // ---------------------------------------------------------------------------- |
| 1502 | // time_t <-> broken down time conversions |
| 1503 | // ---------------------------------------------------------------------------- |
| 1504 | |
| 1505 | wxDateTime::Tm wxDateTime::GetTm(const TimeZone& tz) const |
| 1506 | { |
| 1507 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1508 | |
| 1509 | time_t time = GetTicks(); |
| 1510 | if ( time != (time_t)-1 ) |
| 1511 | { |
| 1512 | // use C RTL functions |
| 1513 | struct tm tmstruct; |
| 1514 | tm *tm; |
| 1515 | if ( tz.GetOffset() == -GetTimeZone() ) |
| 1516 | { |
| 1517 | // we are working with local time |
| 1518 | tm = wxLocaltime_r(&time, &tmstruct); |
| 1519 | |
| 1520 | // should never happen |
| 1521 | wxCHECK_MSG( tm, Tm(), wxT("wxLocaltime_r() failed") ); |
| 1522 | } |
| 1523 | else |
| 1524 | { |
| 1525 | time += (time_t)tz.GetOffset(); |
| 1526 | #if defined(__VMS__) || defined(__WATCOMC__) // time is unsigned so avoid warning |
| 1527 | int time2 = (int) time; |
| 1528 | if ( time2 >= 0 ) |
| 1529 | #else |
| 1530 | if ( time >= 0 ) |
| 1531 | #endif |
| 1532 | { |
| 1533 | tm = wxGmtime_r(&time, &tmstruct); |
| 1534 | |
| 1535 | // should never happen |
| 1536 | wxCHECK_MSG( tm, Tm(), wxT("wxGmtime_r() failed") ); |
| 1537 | } |
| 1538 | else |
| 1539 | { |
| 1540 | tm = (struct tm *)NULL; |
| 1541 | } |
| 1542 | } |
| 1543 | |
| 1544 | if ( tm ) |
| 1545 | { |
| 1546 | // adjust the milliseconds |
| 1547 | Tm tm2(*tm, tz); |
| 1548 | long timeOnly = (m_time % MILLISECONDS_PER_DAY).ToLong(); |
| 1549 | tm2.msec = (wxDateTime_t)(timeOnly % 1000); |
| 1550 | return tm2; |
| 1551 | } |
| 1552 | //else: use generic code below |
| 1553 | } |
| 1554 | |
| 1555 | // remember the time and do the calculations with the date only - this |
| 1556 | // eliminates rounding errors of the floating point arithmetics |
| 1557 | |
| 1558 | wxLongLong timeMidnight = m_time + tz.GetOffset() * 1000; |
| 1559 | |
| 1560 | long timeOnly = (timeMidnight % MILLISECONDS_PER_DAY).ToLong(); |
| 1561 | |
| 1562 | // we want to always have positive time and timeMidnight to be really |
| 1563 | // the midnight before it |
| 1564 | if ( timeOnly < 0 ) |
| 1565 | { |
| 1566 | timeOnly = MILLISECONDS_PER_DAY + timeOnly; |
| 1567 | } |
| 1568 | |
| 1569 | timeMidnight -= timeOnly; |
| 1570 | |
| 1571 | // calculate the Gregorian date from JDN for the midnight of our date: |
| 1572 | // this will yield day, month (in 1..12 range) and year |
| 1573 | |
| 1574 | // actually, this is the JDN for the noon of the previous day |
| 1575 | long jdn = (timeMidnight / MILLISECONDS_PER_DAY).ToLong() + EPOCH_JDN; |
| 1576 | |
| 1577 | // CREDIT: code below is by Scott E. Lee (but bugs are mine) |
| 1578 | |
| 1579 | wxASSERT_MSG( jdn > -2, wxT("JDN out of range") ); |
| 1580 | |
| 1581 | // calculate the century |
| 1582 | long temp = (jdn + JDN_OFFSET) * 4 - 1; |
| 1583 | long century = temp / DAYS_PER_400_YEARS; |
| 1584 | |
| 1585 | // then the year and day of year (1 <= dayOfYear <= 366) |
| 1586 | temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3; |
| 1587 | long year = (century * 100) + (temp / DAYS_PER_4_YEARS); |
| 1588 | long dayOfYear = (temp % DAYS_PER_4_YEARS) / 4 + 1; |
| 1589 | |
| 1590 | // and finally the month and day of the month |
| 1591 | temp = dayOfYear * 5 - 3; |
| 1592 | long month = temp / DAYS_PER_5_MONTHS; |
| 1593 | long day = (temp % DAYS_PER_5_MONTHS) / 5 + 1; |
| 1594 | |
| 1595 | // month is counted from March - convert to normal |
| 1596 | if ( month < 10 ) |
| 1597 | { |
| 1598 | month += 3; |
| 1599 | } |
| 1600 | else |
| 1601 | { |
| 1602 | year += 1; |
| 1603 | month -= 9; |
| 1604 | } |
| 1605 | |
| 1606 | // year is offset by 4800 |
| 1607 | year -= 4800; |
| 1608 | |
| 1609 | // check that the algorithm gave us something reasonable |
| 1610 | wxASSERT_MSG( (0 < month) && (month <= 12), wxT("invalid month") ); |
| 1611 | wxASSERT_MSG( (1 <= day) && (day < 32), wxT("invalid day") ); |
| 1612 | |
| 1613 | // construct Tm from these values |
| 1614 | Tm tm; |
| 1615 | tm.year = (int)year; |
| 1616 | tm.yday = (wxDateTime_t)(dayOfYear - 1); // use C convention for day number |
| 1617 | tm.mon = (Month)(month - 1); // algorithm yields 1 for January, not 0 |
| 1618 | tm.mday = (wxDateTime_t)day; |
| 1619 | tm.msec = (wxDateTime_t)(timeOnly % 1000); |
| 1620 | timeOnly -= tm.msec; |
| 1621 | timeOnly /= 1000; // now we have time in seconds |
| 1622 | |
| 1623 | tm.sec = (wxDateTime_t)(timeOnly % SEC_PER_MIN); |
| 1624 | timeOnly -= tm.sec; |
| 1625 | timeOnly /= SEC_PER_MIN; // now we have time in minutes |
| 1626 | |
| 1627 | tm.min = (wxDateTime_t)(timeOnly % MIN_PER_HOUR); |
| 1628 | timeOnly -= tm.min; |
| 1629 | |
| 1630 | tm.hour = (wxDateTime_t)(timeOnly / MIN_PER_HOUR); |
| 1631 | |
| 1632 | return tm; |
| 1633 | } |
| 1634 | |
| 1635 | wxDateTime& wxDateTime::SetYear(int year) |
| 1636 | { |
| 1637 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1638 | |
| 1639 | Tm tm(GetTm()); |
| 1640 | tm.year = year; |
| 1641 | Set(tm); |
| 1642 | |
| 1643 | return *this; |
| 1644 | } |
| 1645 | |
| 1646 | wxDateTime& wxDateTime::SetMonth(Month month) |
| 1647 | { |
| 1648 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1649 | |
| 1650 | Tm tm(GetTm()); |
| 1651 | tm.mon = month; |
| 1652 | Set(tm); |
| 1653 | |
| 1654 | return *this; |
| 1655 | } |
| 1656 | |
| 1657 | wxDateTime& wxDateTime::SetDay(wxDateTime_t mday) |
| 1658 | { |
| 1659 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1660 | |
| 1661 | Tm tm(GetTm()); |
| 1662 | tm.mday = mday; |
| 1663 | Set(tm); |
| 1664 | |
| 1665 | return *this; |
| 1666 | } |
| 1667 | |
| 1668 | wxDateTime& wxDateTime::SetHour(wxDateTime_t hour) |
| 1669 | { |
| 1670 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1671 | |
| 1672 | Tm tm(GetTm()); |
| 1673 | tm.hour = hour; |
| 1674 | Set(tm); |
| 1675 | |
| 1676 | return *this; |
| 1677 | } |
| 1678 | |
| 1679 | wxDateTime& wxDateTime::SetMinute(wxDateTime_t min) |
| 1680 | { |
| 1681 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1682 | |
| 1683 | Tm tm(GetTm()); |
| 1684 | tm.min = min; |
| 1685 | Set(tm); |
| 1686 | |
| 1687 | return *this; |
| 1688 | } |
| 1689 | |
| 1690 | wxDateTime& wxDateTime::SetSecond(wxDateTime_t sec) |
| 1691 | { |
| 1692 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1693 | |
| 1694 | Tm tm(GetTm()); |
| 1695 | tm.sec = sec; |
| 1696 | Set(tm); |
| 1697 | |
| 1698 | return *this; |
| 1699 | } |
| 1700 | |
| 1701 | wxDateTime& wxDateTime::SetMillisecond(wxDateTime_t millisecond) |
| 1702 | { |
| 1703 | wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") ); |
| 1704 | |
| 1705 | // we don't need to use GetTm() for this one |
| 1706 | m_time -= m_time % 1000l; |
| 1707 | m_time += millisecond; |
| 1708 | |
| 1709 | return *this; |
| 1710 | } |
| 1711 | |
| 1712 | // ---------------------------------------------------------------------------- |
| 1713 | // wxDateTime arithmetics |
| 1714 | // ---------------------------------------------------------------------------- |
| 1715 | |
| 1716 | wxDateTime& wxDateTime::Add(const wxDateSpan& diff) |
| 1717 | { |
| 1718 | Tm tm(GetTm()); |
| 1719 | |
| 1720 | tm.year += diff.GetYears(); |
| 1721 | tm.AddMonths(diff.GetMonths()); |
| 1722 | |
| 1723 | // check that the resulting date is valid |
| 1724 | if ( tm.mday > GetNumOfDaysInMonth(tm.year, tm.mon) ) |
| 1725 | { |
| 1726 | // We suppose that when adding one month to Jan 31 we want to get Feb |
| 1727 | // 28 (or 29), i.e. adding a month to the last day of the month should |
| 1728 | // give the last day of the next month which is quite logical. |
| 1729 | // |
| 1730 | // Unfortunately, there is no logic way to understand what should |
| 1731 | // Jan 30 + 1 month be - Feb 28 too or Feb 27 (assuming non leap year)? |
| 1732 | // We make it Feb 28 (last day too), but it is highly questionable. |
| 1733 | tm.mday = GetNumOfDaysInMonth(tm.year, tm.mon); |
| 1734 | } |
| 1735 | |
| 1736 | tm.AddDays(diff.GetTotalDays()); |
| 1737 | |
| 1738 | Set(tm); |
| 1739 | |
| 1740 | wxASSERT_MSG( IsSameTime(tm), |
| 1741 | wxT("Add(wxDateSpan) shouldn't modify time") ); |
| 1742 | |
| 1743 | return *this; |
| 1744 | } |
| 1745 | |
| 1746 | // ---------------------------------------------------------------------------- |
| 1747 | // Weekday and monthday stuff |
| 1748 | // ---------------------------------------------------------------------------- |
| 1749 | |
| 1750 | // convert Sun, Mon, ..., Sat into 6, 0, ..., 5 |
| 1751 | static inline int ConvertWeekDayToMondayBase(int wd) |
| 1752 | { |
| 1753 | return wd == wxDateTime::Sun ? 6 : wd - 1; |
| 1754 | } |
| 1755 | |
| 1756 | /* static */ |
| 1757 | wxDateTime |
| 1758 | wxDateTime::SetToWeekOfYear(int year, wxDateTime_t numWeek, WeekDay wd) |
| 1759 | { |
| 1760 | wxASSERT_MSG( numWeek > 0, |
| 1761 | wxT("invalid week number: weeks are counted from 1") ); |
| 1762 | |
| 1763 | // Jan 4 always lies in the 1st week of the year |
| 1764 | wxDateTime dt(4, Jan, year); |
| 1765 | dt.SetToWeekDayInSameWeek(wd); |
| 1766 | dt += wxDateSpan::Weeks(numWeek - 1); |
| 1767 | |
| 1768 | return dt; |
| 1769 | } |
| 1770 | |
| 1771 | #if WXWIN_COMPATIBILITY_2_6 |
| 1772 | // use a separate function to avoid warnings about using deprecated |
| 1773 | // SetToTheWeek in GetWeek below |
| 1774 | static wxDateTime |
| 1775 | SetToTheWeek(int year, |
| 1776 | wxDateTime::wxDateTime_t numWeek, |
| 1777 | wxDateTime::WeekDay weekday, |
| 1778 | wxDateTime::WeekFlags flags) |
| 1779 | { |
| 1780 | // Jan 4 always lies in the 1st week of the year |
| 1781 | wxDateTime dt(4, wxDateTime::Jan, year); |
| 1782 | dt.SetToWeekDayInSameWeek(weekday, flags); |
| 1783 | dt += wxDateSpan::Weeks(numWeek - 1); |
| 1784 | |
| 1785 | return dt; |
| 1786 | } |
| 1787 | |
| 1788 | bool wxDateTime::SetToTheWeek(wxDateTime_t numWeek, |
| 1789 | WeekDay weekday, |
| 1790 | WeekFlags flags) |
| 1791 | { |
| 1792 | int year = GetYear(); |
| 1793 | *this = ::SetToTheWeek(year, numWeek, weekday, flags); |
| 1794 | if ( GetYear() != year ) |
| 1795 | { |
| 1796 | // oops... numWeek was too big |
| 1797 | return false; |
| 1798 | } |
| 1799 | |
| 1800 | return true; |
| 1801 | } |
| 1802 | |
| 1803 | wxDateTime wxDateTime::GetWeek(wxDateTime_t numWeek, |
| 1804 | WeekDay weekday, |
| 1805 | WeekFlags flags) const |
| 1806 | { |
| 1807 | return ::SetToTheWeek(GetYear(), numWeek, weekday, flags); |
| 1808 | } |
| 1809 | #endif // WXWIN_COMPATIBILITY_2_6 |
| 1810 | |
| 1811 | wxDateTime& wxDateTime::SetToLastMonthDay(Month month, |
| 1812 | int year) |
| 1813 | { |
| 1814 | // take the current month/year if none specified |
| 1815 | if ( year == Inv_Year ) |
| 1816 | year = GetYear(); |
| 1817 | if ( month == Inv_Month ) |
| 1818 | month = GetMonth(); |
| 1819 | |
| 1820 | return Set(GetNumOfDaysInMonth(year, month), month, year); |
| 1821 | } |
| 1822 | |
| 1823 | wxDateTime& wxDateTime::SetToWeekDayInSameWeek(WeekDay weekday, WeekFlags flags) |
| 1824 | { |
| 1825 | wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") ); |
| 1826 | |
| 1827 | int wdayDst = weekday, |
| 1828 | wdayThis = GetWeekDay(); |
| 1829 | if ( wdayDst == wdayThis ) |
| 1830 | { |
| 1831 | // nothing to do |
| 1832 | return *this; |
| 1833 | } |
| 1834 | |
| 1835 | if ( flags == Default_First ) |
| 1836 | { |
| 1837 | flags = GetCountry() == USA ? Sunday_First : Monday_First; |
| 1838 | } |
| 1839 | |
| 1840 | // the logic below based on comparing weekday and wdayThis works if Sun (0) |
| 1841 | // is the first day in the week, but breaks down for Monday_First case so |
| 1842 | // we adjust the week days in this case |
| 1843 | if ( flags == Monday_First ) |
| 1844 | { |
| 1845 | if ( wdayThis == Sun ) |
| 1846 | wdayThis += 7; |
| 1847 | if ( wdayDst == Sun ) |
| 1848 | wdayDst += 7; |
| 1849 | } |
| 1850 | //else: Sunday_First, nothing to do |
| 1851 | |
| 1852 | // go forward or back in time to the day we want |
| 1853 | if ( wdayDst < wdayThis ) |
| 1854 | { |
| 1855 | return Subtract(wxDateSpan::Days(wdayThis - wdayDst)); |
| 1856 | } |
| 1857 | else // weekday > wdayThis |
| 1858 | { |
| 1859 | return Add(wxDateSpan::Days(wdayDst - wdayThis)); |
| 1860 | } |
| 1861 | } |
| 1862 | |
| 1863 | wxDateTime& wxDateTime::SetToNextWeekDay(WeekDay weekday) |
| 1864 | { |
| 1865 | wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") ); |
| 1866 | |
| 1867 | int diff; |
| 1868 | WeekDay wdayThis = GetWeekDay(); |
| 1869 | if ( weekday == wdayThis ) |
| 1870 | { |
| 1871 | // nothing to do |
| 1872 | return *this; |
| 1873 | } |
| 1874 | else if ( weekday < wdayThis ) |
| 1875 | { |
| 1876 | // need to advance a week |
| 1877 | diff = 7 - (wdayThis - weekday); |
| 1878 | } |
| 1879 | else // weekday > wdayThis |
| 1880 | { |
| 1881 | diff = weekday - wdayThis; |
| 1882 | } |
| 1883 | |
| 1884 | return Add(wxDateSpan::Days(diff)); |
| 1885 | } |
| 1886 | |
| 1887 | wxDateTime& wxDateTime::SetToPrevWeekDay(WeekDay weekday) |
| 1888 | { |
| 1889 | wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") ); |
| 1890 | |
| 1891 | int diff; |
| 1892 | WeekDay wdayThis = GetWeekDay(); |
| 1893 | if ( weekday == wdayThis ) |
| 1894 | { |
| 1895 | // nothing to do |
| 1896 | return *this; |
| 1897 | } |
| 1898 | else if ( weekday > wdayThis ) |
| 1899 | { |
| 1900 | // need to go to previous week |
| 1901 | diff = 7 - (weekday - wdayThis); |
| 1902 | } |
| 1903 | else // weekday < wdayThis |
| 1904 | { |
| 1905 | diff = wdayThis - weekday; |
| 1906 | } |
| 1907 | |
| 1908 | return Subtract(wxDateSpan::Days(diff)); |
| 1909 | } |
| 1910 | |
| 1911 | bool wxDateTime::SetToWeekDay(WeekDay weekday, |
| 1912 | int n, |
| 1913 | Month month, |
| 1914 | int year) |
| 1915 | { |
| 1916 | wxCHECK_MSG( weekday != Inv_WeekDay, false, wxT("invalid weekday") ); |
| 1917 | |
| 1918 | // we don't check explicitly that -5 <= n <= 5 because we will return false |
| 1919 | // anyhow in such case - but may be should still give an assert for it? |
| 1920 | |
| 1921 | // take the current month/year if none specified |
| 1922 | ReplaceDefaultYearMonthWithCurrent(&year, &month); |
| 1923 | |
| 1924 | wxDateTime dt; |
| 1925 | |
| 1926 | // TODO this probably could be optimised somehow... |
| 1927 | |
| 1928 | if ( n > 0 ) |
| 1929 | { |
| 1930 | // get the first day of the month |
| 1931 | dt.Set(1, month, year); |
| 1932 | |
| 1933 | // get its wday |
| 1934 | WeekDay wdayFirst = dt.GetWeekDay(); |
| 1935 | |
| 1936 | // go to the first weekday of the month |
| 1937 | int diff = weekday - wdayFirst; |
| 1938 | if ( diff < 0 ) |
| 1939 | diff += 7; |
| 1940 | |
| 1941 | // add advance n-1 weeks more |
| 1942 | diff += 7*(n - 1); |
| 1943 | |
| 1944 | dt += wxDateSpan::Days(diff); |
| 1945 | } |
| 1946 | else // count from the end of the month |
| 1947 | { |
| 1948 | // get the last day of the month |
| 1949 | dt.SetToLastMonthDay(month, year); |
| 1950 | |
| 1951 | // get its wday |
| 1952 | WeekDay wdayLast = dt.GetWeekDay(); |
| 1953 | |
| 1954 | // go to the last weekday of the month |
| 1955 | int diff = wdayLast - weekday; |
| 1956 | if ( diff < 0 ) |
| 1957 | diff += 7; |
| 1958 | |
| 1959 | // and rewind n-1 weeks from there |
| 1960 | diff += 7*(-n - 1); |
| 1961 | |
| 1962 | dt -= wxDateSpan::Days(diff); |
| 1963 | } |
| 1964 | |
| 1965 | // check that it is still in the same month |
| 1966 | if ( dt.GetMonth() == month ) |
| 1967 | { |
| 1968 | *this = dt; |
| 1969 | |
| 1970 | return true; |
| 1971 | } |
| 1972 | else |
| 1973 | { |
| 1974 | // no such day in this month |
| 1975 | return false; |
| 1976 | } |
| 1977 | } |
| 1978 | |
| 1979 | static inline |
| 1980 | wxDateTime::wxDateTime_t GetDayOfYearFromTm(const wxDateTime::Tm& tm) |
| 1981 | { |
| 1982 | return (wxDateTime::wxDateTime_t)(gs_cumulatedDays[wxDateTime::IsLeapYear(tm.year)][tm.mon] + tm.mday); |
| 1983 | } |
| 1984 | |
| 1985 | wxDateTime::wxDateTime_t wxDateTime::GetDayOfYear(const TimeZone& tz) const |
| 1986 | { |
| 1987 | return GetDayOfYearFromTm(GetTm(tz)); |
| 1988 | } |
| 1989 | |
| 1990 | wxDateTime::wxDateTime_t |
| 1991 | wxDateTime::GetWeekOfYear(wxDateTime::WeekFlags flags, const TimeZone& tz) const |
| 1992 | { |
| 1993 | if ( flags == Default_First ) |
| 1994 | { |
| 1995 | flags = GetCountry() == USA ? Sunday_First : Monday_First; |
| 1996 | } |
| 1997 | |
| 1998 | Tm tm(GetTm(tz)); |
| 1999 | wxDateTime_t nDayInYear = GetDayOfYearFromTm(tm); |
| 2000 | |
| 2001 | int wdTarget = GetWeekDay(tz); |
| 2002 | int wdYearStart = wxDateTime(1, Jan, GetYear()).GetWeekDay(); |
| 2003 | int week; |
| 2004 | if ( flags == Sunday_First ) |
| 2005 | { |
| 2006 | // FIXME: First week is not calculated correctly. |
| 2007 | week = (nDayInYear - wdTarget + 7) / 7; |
| 2008 | if ( wdYearStart == Wed || wdYearStart == Thu ) |
| 2009 | week++; |
| 2010 | } |
| 2011 | else // week starts with monday |
| 2012 | { |
| 2013 | // adjust the weekdays to non-US style. |
| 2014 | wdYearStart = ConvertWeekDayToMondayBase(wdYearStart); |
| 2015 | wdTarget = ConvertWeekDayToMondayBase(wdTarget); |
| 2016 | |
| 2017 | // quoting from http://www.cl.cam.ac.uk/~mgk25/iso-time.html: |
| 2018 | // |
| 2019 | // Week 01 of a year is per definition the first week that has the |
| 2020 | // Thursday in this year, which is equivalent to the week that |
| 2021 | // contains the fourth day of January. In other words, the first |
| 2022 | // week of a new year is the week that has the majority of its |
| 2023 | // days in the new year. Week 01 might also contain days from the |
| 2024 | // previous year and the week before week 01 of a year is the last |
| 2025 | // week (52 or 53) of the previous year even if it contains days |
| 2026 | // from the new year. A week starts with Monday (day 1) and ends |
| 2027 | // with Sunday (day 7). |
| 2028 | // |
| 2029 | |
| 2030 | // if Jan 1 is Thursday or less, it is in the first week of this year |
| 2031 | if ( wdYearStart < 4 ) |
| 2032 | { |
| 2033 | // count the number of entire weeks between Jan 1 and this date |
| 2034 | week = (nDayInYear + wdYearStart + 6 - wdTarget)/7; |
| 2035 | |
| 2036 | // be careful to check for overflow in the next year |
| 2037 | if ( week == 53 && tm.mday - wdTarget > 28 ) |
| 2038 | week = 1; |
| 2039 | } |
| 2040 | else // Jan 1 is in the last week of the previous year |
| 2041 | { |
| 2042 | // check if we happen to be at the last week of previous year: |
| 2043 | if ( tm.mon == Jan && tm.mday < 8 - wdYearStart ) |
| 2044 | week = wxDateTime(31, Dec, GetYear()-1).GetWeekOfYear(); |
| 2045 | else |
| 2046 | week = (nDayInYear + wdYearStart - 1 - wdTarget)/7; |
| 2047 | } |
| 2048 | } |
| 2049 | |
| 2050 | return (wxDateTime::wxDateTime_t)week; |
| 2051 | } |
| 2052 | |
| 2053 | wxDateTime::wxDateTime_t wxDateTime::GetWeekOfMonth(wxDateTime::WeekFlags flags, |
| 2054 | const TimeZone& tz) const |
| 2055 | { |
| 2056 | Tm tm = GetTm(tz); |
| 2057 | const wxDateTime dateFirst = wxDateTime(1, tm.mon, tm.year); |
| 2058 | const wxDateTime::WeekDay wdFirst = dateFirst.GetWeekDay(); |
| 2059 | |
| 2060 | if ( flags == Default_First ) |
| 2061 | { |
| 2062 | flags = GetCountry() == USA ? Sunday_First : Monday_First; |
| 2063 | } |
| 2064 | |
| 2065 | // compute offset of dateFirst from the beginning of the week |
| 2066 | int firstOffset; |
| 2067 | if ( flags == Sunday_First ) |
| 2068 | firstOffset = wdFirst - Sun; |
| 2069 | else |
| 2070 | firstOffset = wdFirst == Sun ? DAYS_PER_WEEK - 1 : wdFirst - Mon; |
| 2071 | |
| 2072 | return (wxDateTime::wxDateTime_t)((tm.mday - 1 + firstOffset)/7 + 1); |
| 2073 | } |
| 2074 | |
| 2075 | wxDateTime& wxDateTime::SetToYearDay(wxDateTime::wxDateTime_t yday) |
| 2076 | { |
| 2077 | int year = GetYear(); |
| 2078 | wxDATETIME_CHECK( (0 < yday) && (yday <= GetNumberOfDays(year)), |
| 2079 | wxT("invalid year day") ); |
| 2080 | |
| 2081 | bool isLeap = IsLeapYear(year); |
| 2082 | for ( Month mon = Jan; mon < Inv_Month; wxNextMonth(mon) ) |
| 2083 | { |
| 2084 | // for Dec, we can't compare with gs_cumulatedDays[mon + 1], but we |
| 2085 | // don't need it neither - because of the CHECK above we know that |
| 2086 | // yday lies in December then |
| 2087 | if ( (mon == Dec) || (yday <= gs_cumulatedDays[isLeap][mon + 1]) ) |
| 2088 | { |
| 2089 | Set((wxDateTime::wxDateTime_t)(yday - gs_cumulatedDays[isLeap][mon]), mon, year); |
| 2090 | |
| 2091 | break; |
| 2092 | } |
| 2093 | } |
| 2094 | |
| 2095 | return *this; |
| 2096 | } |
| 2097 | |
| 2098 | // ---------------------------------------------------------------------------- |
| 2099 | // Julian day number conversion and related stuff |
| 2100 | // ---------------------------------------------------------------------------- |
| 2101 | |
| 2102 | double wxDateTime::GetJulianDayNumber() const |
| 2103 | { |
| 2104 | return m_time.ToDouble() / MILLISECONDS_PER_DAY + EPOCH_JDN + 0.5; |
| 2105 | } |
| 2106 | |
| 2107 | double wxDateTime::GetRataDie() const |
| 2108 | { |
| 2109 | // March 1 of the year 0 is Rata Die day -306 and JDN 1721119.5 |
| 2110 | return GetJulianDayNumber() - 1721119.5 - 306; |
| 2111 | } |
| 2112 | |
| 2113 | // ---------------------------------------------------------------------------- |
| 2114 | // timezone and DST stuff |
| 2115 | // ---------------------------------------------------------------------------- |
| 2116 | |
| 2117 | int wxDateTime::IsDST(wxDateTime::Country country) const |
| 2118 | { |
| 2119 | wxCHECK_MSG( country == Country_Default, -1, |
| 2120 | wxT("country support not implemented") ); |
| 2121 | |
| 2122 | // use the C RTL for the dates in the standard range |
| 2123 | time_t timet = GetTicks(); |
| 2124 | if ( timet != (time_t)-1 ) |
| 2125 | { |
| 2126 | struct tm tmstruct; |
| 2127 | tm *tm = wxLocaltime_r(&timet, &tmstruct); |
| 2128 | |
| 2129 | wxCHECK_MSG( tm, -1, wxT("wxLocaltime_r() failed") ); |
| 2130 | |
| 2131 | return tm->tm_isdst; |
| 2132 | } |
| 2133 | else |
| 2134 | { |
| 2135 | int year = GetYear(); |
| 2136 | |
| 2137 | if ( !IsDSTApplicable(year, country) ) |
| 2138 | { |
| 2139 | // no DST time in this year in this country |
| 2140 | return -1; |
| 2141 | } |
| 2142 | |
| 2143 | return IsBetween(GetBeginDST(year, country), GetEndDST(year, country)); |
| 2144 | } |
| 2145 | } |
| 2146 | |
| 2147 | wxDateTime& wxDateTime::MakeTimezone(const TimeZone& tz, bool noDST) |
| 2148 | { |
| 2149 | long secDiff = GetTimeZone() + tz.GetOffset(); |
| 2150 | |
| 2151 | // we need to know whether DST is or not in effect for this date unless |
| 2152 | // the test disabled by the caller |
| 2153 | if ( !noDST && (IsDST() == 1) ) |
| 2154 | { |
| 2155 | // FIXME we assume that the DST is always shifted by 1 hour |
| 2156 | secDiff -= 3600; |
| 2157 | } |
| 2158 | |
| 2159 | return Add(wxTimeSpan::Seconds(secDiff)); |
| 2160 | } |
| 2161 | |
| 2162 | wxDateTime& wxDateTime::MakeFromTimezone(const TimeZone& tz, bool noDST) |
| 2163 | { |
| 2164 | long secDiff = GetTimeZone() + tz.GetOffset(); |
| 2165 | |
| 2166 | // we need to know whether DST is or not in effect for this date unless |
| 2167 | // the test disabled by the caller |
| 2168 | if ( !noDST && (IsDST() == 1) ) |
| 2169 | { |
| 2170 | // FIXME we assume that the DST is always shifted by 1 hour |
| 2171 | secDiff -= 3600; |
| 2172 | } |
| 2173 | |
| 2174 | return Subtract(wxTimeSpan::Seconds(secDiff)); |
| 2175 | } |
| 2176 | |
| 2177 | // ============================================================================ |
| 2178 | // wxDateTimeHolidayAuthority and related classes |
| 2179 | // ============================================================================ |
| 2180 | |
| 2181 | #include "wx/arrimpl.cpp" |
| 2182 | |
| 2183 | WX_DEFINE_OBJARRAY(wxDateTimeArray) |
| 2184 | |
| 2185 | static int wxCMPFUNC_CONV |
| 2186 | wxDateTimeCompareFunc(wxDateTime **first, wxDateTime **second) |
| 2187 | { |
| 2188 | wxDateTime dt1 = **first, |
| 2189 | dt2 = **second; |
| 2190 | |
| 2191 | return dt1 == dt2 ? 0 : dt1 < dt2 ? -1 : +1; |
| 2192 | } |
| 2193 | |
| 2194 | // ---------------------------------------------------------------------------- |
| 2195 | // wxDateTimeHolidayAuthority |
| 2196 | // ---------------------------------------------------------------------------- |
| 2197 | |
| 2198 | wxHolidayAuthoritiesArray wxDateTimeHolidayAuthority::ms_authorities; |
| 2199 | |
| 2200 | /* static */ |
| 2201 | bool wxDateTimeHolidayAuthority::IsHoliday(const wxDateTime& dt) |
| 2202 | { |
| 2203 | size_t count = ms_authorities.size(); |
| 2204 | for ( size_t n = 0; n < count; n++ ) |
| 2205 | { |
| 2206 | if ( ms_authorities[n]->DoIsHoliday(dt) ) |
| 2207 | { |
| 2208 | return true; |
| 2209 | } |
| 2210 | } |
| 2211 | |
| 2212 | return false; |
| 2213 | } |
| 2214 | |
| 2215 | /* static */ |
| 2216 | size_t |
| 2217 | wxDateTimeHolidayAuthority::GetHolidaysInRange(const wxDateTime& dtStart, |
| 2218 | const wxDateTime& dtEnd, |
| 2219 | wxDateTimeArray& holidays) |
| 2220 | { |
| 2221 | wxDateTimeArray hol; |
| 2222 | |
| 2223 | holidays.Clear(); |
| 2224 | |
| 2225 | const size_t countAuth = ms_authorities.size(); |
| 2226 | for ( size_t nAuth = 0; nAuth < countAuth; nAuth++ ) |
| 2227 | { |
| 2228 | ms_authorities[nAuth]->DoGetHolidaysInRange(dtStart, dtEnd, hol); |
| 2229 | |
| 2230 | WX_APPEND_ARRAY(holidays, hol); |
| 2231 | } |
| 2232 | |
| 2233 | holidays.Sort(wxDateTimeCompareFunc); |
| 2234 | |
| 2235 | return holidays.size(); |
| 2236 | } |
| 2237 | |
| 2238 | /* static */ |
| 2239 | void wxDateTimeHolidayAuthority::ClearAllAuthorities() |
| 2240 | { |
| 2241 | WX_CLEAR_ARRAY(ms_authorities); |
| 2242 | } |
| 2243 | |
| 2244 | /* static */ |
| 2245 | void wxDateTimeHolidayAuthority::AddAuthority(wxDateTimeHolidayAuthority *auth) |
| 2246 | { |
| 2247 | ms_authorities.push_back(auth); |
| 2248 | } |
| 2249 | |
| 2250 | wxDateTimeHolidayAuthority::~wxDateTimeHolidayAuthority() |
| 2251 | { |
| 2252 | // required here for Darwin |
| 2253 | } |
| 2254 | |
| 2255 | // ---------------------------------------------------------------------------- |
| 2256 | // wxDateTimeWorkDays |
| 2257 | // ---------------------------------------------------------------------------- |
| 2258 | |
| 2259 | bool wxDateTimeWorkDays::DoIsHoliday(const wxDateTime& dt) const |
| 2260 | { |
| 2261 | wxDateTime::WeekDay wd = dt.GetWeekDay(); |
| 2262 | |
| 2263 | return (wd == wxDateTime::Sun) || (wd == wxDateTime::Sat); |
| 2264 | } |
| 2265 | |
| 2266 | size_t wxDateTimeWorkDays::DoGetHolidaysInRange(const wxDateTime& dtStart, |
| 2267 | const wxDateTime& dtEnd, |
| 2268 | wxDateTimeArray& holidays) const |
| 2269 | { |
| 2270 | if ( dtStart > dtEnd ) |
| 2271 | { |
| 2272 | wxFAIL_MSG( wxT("invalid date range in GetHolidaysInRange") ); |
| 2273 | |
| 2274 | return 0u; |
| 2275 | } |
| 2276 | |
| 2277 | holidays.Empty(); |
| 2278 | |
| 2279 | // instead of checking all days, start with the first Sat after dtStart and |
| 2280 | // end with the last Sun before dtEnd |
| 2281 | wxDateTime dtSatFirst = dtStart.GetNextWeekDay(wxDateTime::Sat), |
| 2282 | dtSatLast = dtEnd.GetPrevWeekDay(wxDateTime::Sat), |
| 2283 | dtSunFirst = dtStart.GetNextWeekDay(wxDateTime::Sun), |
| 2284 | dtSunLast = dtEnd.GetPrevWeekDay(wxDateTime::Sun), |
| 2285 | dt; |
| 2286 | |
| 2287 | for ( dt = dtSatFirst; dt <= dtSatLast; dt += wxDateSpan::Week() ) |
| 2288 | { |
| 2289 | holidays.Add(dt); |
| 2290 | } |
| 2291 | |
| 2292 | for ( dt = dtSunFirst; dt <= dtSunLast; dt += wxDateSpan::Week() ) |
| 2293 | { |
| 2294 | holidays.Add(dt); |
| 2295 | } |
| 2296 | |
| 2297 | return holidays.GetCount(); |
| 2298 | } |
| 2299 | |
| 2300 | // ============================================================================ |
| 2301 | // other helper functions |
| 2302 | // ============================================================================ |
| 2303 | |
| 2304 | // ---------------------------------------------------------------------------- |
| 2305 | // iteration helpers: can be used to write a for loop over enum variable like |
| 2306 | // this: |
| 2307 | // for ( m = wxDateTime::Jan; m < wxDateTime::Inv_Month; wxNextMonth(m) ) |
| 2308 | // ---------------------------------------------------------------------------- |
| 2309 | |
| 2310 | WXDLLIMPEXP_BASE void wxNextMonth(wxDateTime::Month& m) |
| 2311 | { |
| 2312 | wxASSERT_MSG( m < wxDateTime::Inv_Month, wxT("invalid month") ); |
| 2313 | |
| 2314 | // no wrapping or the for loop above would never end! |
| 2315 | m = (wxDateTime::Month)(m + 1); |
| 2316 | } |
| 2317 | |
| 2318 | WXDLLIMPEXP_BASE void wxPrevMonth(wxDateTime::Month& m) |
| 2319 | { |
| 2320 | wxASSERT_MSG( m < wxDateTime::Inv_Month, wxT("invalid month") ); |
| 2321 | |
| 2322 | m = m == wxDateTime::Jan ? wxDateTime::Inv_Month |
| 2323 | : (wxDateTime::Month)(m - 1); |
| 2324 | } |
| 2325 | |
| 2326 | WXDLLIMPEXP_BASE void wxNextWDay(wxDateTime::WeekDay& wd) |
| 2327 | { |
| 2328 | wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, wxT("invalid week day") ); |
| 2329 | |
| 2330 | // no wrapping or the for loop above would never end! |
| 2331 | wd = (wxDateTime::WeekDay)(wd + 1); |
| 2332 | } |
| 2333 | |
| 2334 | WXDLLIMPEXP_BASE void wxPrevWDay(wxDateTime::WeekDay& wd) |
| 2335 | { |
| 2336 | wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, wxT("invalid week day") ); |
| 2337 | |
| 2338 | wd = wd == wxDateTime::Sun ? wxDateTime::Inv_WeekDay |
| 2339 | : (wxDateTime::WeekDay)(wd - 1); |
| 2340 | } |
| 2341 | |
| 2342 | #ifdef __WXMSW__ |
| 2343 | |
| 2344 | wxDateTime& wxDateTime::SetFromMSWSysTime(const SYSTEMTIME& st) |
| 2345 | { |
| 2346 | return Set(st.wDay, |
| 2347 | static_cast<wxDateTime::Month>(wxDateTime::Jan + st.wMonth - 1), |
| 2348 | st.wYear, |
| 2349 | st.wHour, st.wMinute, st.wSecond, st.wMilliseconds); |
| 2350 | } |
| 2351 | |
| 2352 | wxDateTime& wxDateTime::SetFromMSWSysDate(const SYSTEMTIME& st) |
| 2353 | { |
| 2354 | return Set(st.wDay, |
| 2355 | static_cast<wxDateTime::Month>(wxDateTime::Jan + st.wMonth - 1), |
| 2356 | st.wYear, |
| 2357 | 0, 0, 0, 0); |
| 2358 | } |
| 2359 | |
| 2360 | void wxDateTime::GetAsMSWSysTime(SYSTEMTIME* st) const |
| 2361 | { |
| 2362 | const wxDateTime::Tm tm(GetTm()); |
| 2363 | |
| 2364 | st->wYear = (WXWORD)tm.year; |
| 2365 | st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1); |
| 2366 | st->wDay = tm.mday; |
| 2367 | |
| 2368 | st->wDayOfWeek = 0; |
| 2369 | st->wHour = tm.hour; |
| 2370 | st->wMinute = tm.min; |
| 2371 | st->wSecond = tm.sec; |
| 2372 | st->wMilliseconds = tm.msec; |
| 2373 | } |
| 2374 | |
| 2375 | void wxDateTime::GetAsMSWSysDate(SYSTEMTIME* st) const |
| 2376 | { |
| 2377 | const wxDateTime::Tm tm(GetTm()); |
| 2378 | |
| 2379 | st->wYear = (WXWORD)tm.year; |
| 2380 | st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1); |
| 2381 | st->wDay = tm.mday; |
| 2382 | |
| 2383 | st->wDayOfWeek = |
| 2384 | st->wHour = |
| 2385 | st->wMinute = |
| 2386 | st->wSecond = |
| 2387 | st->wMilliseconds = 0; |
| 2388 | } |
| 2389 | |
| 2390 | #endif // __WXMSW__ |
| 2391 | |
| 2392 | #endif // wxUSE_DATETIME |