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1///////////////////////////////////////////////////////////////////////////////
2// Name: src/common/datetimefmt.cpp
3// Purpose: wxDateTime formatting & parsing code
4// Author: Vadim Zeitlin
5// Modified by:
6// Created: 11.05.99
7// RCS-ID: $Id$
8// Copyright: (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9// parts of code taken from sndcal library by Scott E. Lee:
10//
11// Copyright 1993-1995, Scott E. Lee, all rights reserved.
12// Permission granted to use, copy, modify, distribute and sell
13// so long as the above copyright and this permission statement
14// are retained in all copies.
15//
16// Licence: wxWindows licence
17///////////////////////////////////////////////////////////////////////////////
18
19// ============================================================================
20// declarations
21// ============================================================================
22
23// ----------------------------------------------------------------------------
24// headers
25// ----------------------------------------------------------------------------
26
27// For compilers that support precompilation, includes "wx.h".
28#include "wx/wxprec.h"
29
30#ifdef __BORLANDC__
31 #pragma hdrstop
32#endif
33
34#if !defined(wxUSE_DATETIME) || wxUSE_DATETIME
35
36#ifndef WX_PRECOMP
37 #ifdef __WXMSW__
38 #include "wx/msw/wrapwin.h"
39 #endif
40 #include "wx/string.h"
41 #include "wx/log.h"
42 #include "wx/intl.h"
43 #include "wx/stopwatch.h" // for wxGetLocalTimeMillis()
44 #include "wx/module.h"
45 #include "wx/crt.h"
46#endif // WX_PRECOMP
47
48#include "wx/thread.h"
49
50#include <ctype.h>
51
52#ifdef __WINDOWS__
53 #include <winnls.h>
54 #ifndef __WXWINCE__
55 #include <locale.h>
56 #endif
57#endif
58
59#include "wx/datetime.h"
60
61// ============================================================================
62// implementation of wxDateTime
63// ============================================================================
64
65// ----------------------------------------------------------------------------
66// helpers shared between datetime.cpp and datetimefmt.cpp
67// ----------------------------------------------------------------------------
68
69extern void InitTm(struct tm& tm);
70
71extern int GetTimeZone();
72
73extern wxString CallStrftime(const wxString& format, const tm* tm);
74
75// ----------------------------------------------------------------------------
76// constants (see also datetime.cpp)
77// ----------------------------------------------------------------------------
78
79static const int DAYS_PER_WEEK = 7;
80
81static const int HOURS_PER_DAY = 24;
82
83static const int SEC_PER_MIN = 60;
84
85static const int MIN_PER_HOUR = 60;
86
87// ----------------------------------------------------------------------------
88// parsing helpers
89// ----------------------------------------------------------------------------
90
91namespace
92{
93
94// all the functions below taking non-const wxString::const_iterator p advance
95// it until the end of the match
96
97// scans all digits (but no more than len) and returns the resulting number
98bool GetNumericToken(size_t len,
99 wxString::const_iterator& p,
100 const wxString::const_iterator& end,
101 unsigned long *number)
102{
103 size_t n = 1;
104 wxString s;
105 while ( p != end && wxIsdigit(*p) )
106 {
107 s += *p++;
108
109 if ( len && ++n > len )
110 break;
111 }
112
113 return !s.empty() && s.ToULong(number);
114}
115
116// scans all alphabetic characters and returns the resulting string
117wxString
118GetAlphaToken(wxString::const_iterator& p,
119 const wxString::const_iterator& end)
120{
121 wxString s;
122 while ( p != end && wxIsalpha(*p) )
123 {
124 s += *p++;
125 }
126
127 return s;
128}
129
130enum
131{
132 DateLang_English = 1,
133 DateLang_Local = 2
134};
135
136// return the month if the string is a month name or Inv_Month otherwise
137//
138// flags can contain wxDateTime::Name_Abbr/Name_Full or both of them and lang
139// can be either DateLang_Local (default) to interpret string as a localized
140// month name or DateLang_English to parse it as a standard English name or
141// their combination to interpret it in any way
142wxDateTime::Month
143GetMonthFromName(wxString::const_iterator& p,
144 const wxString::const_iterator& end,
145 int flags,
146 int lang)
147{
148 const wxString::const_iterator pOrig = p;
149 const wxString name = GetAlphaToken(p, end);
150 if ( name.empty() )
151 return wxDateTime::Inv_Month;
152
153 wxDateTime::Month mon;
154 for ( mon = wxDateTime::Jan; mon < wxDateTime::Inv_Month; wxNextMonth(mon) )
155 {
156 // case-insensitive comparison either one of or with both abbreviated
157 // and not versions
158 if ( flags & wxDateTime::Name_Full )
159 {
160 if ( lang & DateLang_English )
161 {
162 if ( name.CmpNoCase(wxDateTime::GetEnglishMonthName(mon,
163 wxDateTime::Name_Full)) == 0 )
164 break;
165 }
166
167 if ( lang & DateLang_Local )
168 {
169 if ( name.CmpNoCase(wxDateTime::GetMonthName(mon,
170 wxDateTime::Name_Full)) == 0 )
171 break;
172 }
173 }
174
175 if ( flags & wxDateTime::Name_Abbr )
176 {
177 if ( lang & DateLang_English )
178 {
179 if ( name.CmpNoCase(wxDateTime::GetEnglishMonthName(mon,
180 wxDateTime::Name_Abbr)) == 0 )
181 break;
182 }
183
184 if ( lang & DateLang_Local )
185 {
186 // some locales (e.g. French one) use periods for the
187 // abbreviated month names but it's never part of name so
188 // compare it specially
189 wxString nameAbbr = wxDateTime::GetMonthName(mon,
190 wxDateTime::Name_Abbr);
191 const bool hasPeriod = *nameAbbr.rbegin() == '.';
192 if ( hasPeriod )
193 nameAbbr.erase(nameAbbr.end() - 1);
194
195 if ( name.CmpNoCase(nameAbbr) == 0 )
196 {
197 if ( hasPeriod )
198 {
199 // skip trailing period if it was part of the match
200 if ( *p == '.' )
201 ++p;
202 else // no match as no matching period
203 continue;
204 }
205
206 break;
207 }
208 }
209 }
210 }
211
212 if ( mon == wxDateTime::Inv_Month )
213 p = pOrig;
214
215 return mon;
216}
217
218// return the weekday if the string is a weekday name or Inv_WeekDay otherwise
219//
220// flags and lang parameters have the same meaning as for GetMonthFromName()
221// above
222wxDateTime::WeekDay
223GetWeekDayFromName(wxString::const_iterator& p,
224 const wxString::const_iterator& end,
225 int flags, int lang)
226{
227 const wxString::const_iterator pOrig = p;
228 const wxString name = GetAlphaToken(p, end);
229 if ( name.empty() )
230 return wxDateTime::Inv_WeekDay;
231
232 wxDateTime::WeekDay wd;
233 for ( wd = wxDateTime::Sun; wd < wxDateTime::Inv_WeekDay; wxNextWDay(wd) )
234 {
235 if ( flags & wxDateTime::Name_Full )
236 {
237 if ( lang & DateLang_English )
238 {
239 if ( name.CmpNoCase(wxDateTime::GetEnglishWeekDayName(wd,
240 wxDateTime::Name_Full)) == 0 )
241 break;
242 }
243
244 if ( lang & DateLang_Local )
245 {
246 if ( name.CmpNoCase(wxDateTime::GetWeekDayName(wd,
247 wxDateTime::Name_Full)) == 0 )
248 break;
249 }
250 }
251
252 if ( flags & wxDateTime::Name_Abbr )
253 {
254 if ( lang & DateLang_English )
255 {
256 if ( name.CmpNoCase(wxDateTime::GetEnglishWeekDayName(wd,
257 wxDateTime::Name_Abbr)) == 0 )
258 break;
259 }
260
261 if ( lang & DateLang_Local )
262 {
263 if ( name.CmpNoCase(wxDateTime::GetWeekDayName(wd,
264 wxDateTime::Name_Abbr)) == 0 )
265 break;
266 }
267 }
268 }
269
270 if ( wd == wxDateTime::Inv_WeekDay )
271 p = pOrig;
272
273 return wd;
274}
275
276// parses string starting at given iterator using the specified format and,
277// optionally, a fall back format (and optionally another one... but it stops
278// there, really)
279//
280// if unsuccessful, returns invalid wxDateTime without changing p; otherwise
281// advance p to the end of the match and returns wxDateTime containing the
282// results of the parsing
283wxDateTime
284ParseFormatAt(wxString::const_iterator& p,
285 const wxString::const_iterator& end,
286 const wxString& fmt,
287 // FIXME-VC6: using wxString() instead of wxEmptyString in the
288 // line below results in error C2062: type 'class
289 // wxString (__cdecl *)(void)' unexpected
290 const wxString& fmtAlt = wxEmptyString)
291{
292 const wxString str(p, end);
293 wxString::const_iterator endParse;
294 wxDateTime dt;
295 if ( dt.ParseFormat(str, fmt, &endParse) ||
296 (!fmtAlt.empty() && dt.ParseFormat(str, fmtAlt, &endParse)) )
297 {
298 p += endParse - str.begin();
299 }
300 //else: all formats failed
301
302 return dt;
303}
304
305} // anonymous namespace
306
307// ----------------------------------------------------------------------------
308// wxDateTime to/from text representations
309// ----------------------------------------------------------------------------
310
311wxString wxDateTime::Format(const wxString& formatp, const TimeZone& tz) const
312{
313 wxCHECK_MSG( !formatp.empty(), wxEmptyString,
314 wxT("NULL format in wxDateTime::Format") );
315
316 wxString format = formatp;
317#ifdef __WXOSX__
318 format.Replace("%c",wxLocale::GetInfo(wxLOCALE_DATE_TIME_FMT));
319 format.Replace("%x",wxLocale::GetInfo(wxLOCALE_SHORT_DATE_FMT));
320 format.Replace("%X",wxLocale::GetInfo(wxLOCALE_TIME_FMT));
321#endif
322 // we have to use our own implementation if the date is out of range of
323 // strftime() or if we use non standard specificators
324#ifdef wxHAS_STRFTIME
325 time_t time = GetTicks();
326
327 if ( (time != (time_t)-1) && !wxStrstr(format, wxT("%l")) )
328 {
329 // use strftime()
330 struct tm tmstruct;
331 struct tm *tm;
332 if ( tz.GetOffset() == -GetTimeZone() )
333 {
334 // we are working with local time
335 tm = wxLocaltime_r(&time, &tmstruct);
336
337 // should never happen
338 wxCHECK_MSG( tm, wxEmptyString, wxT("wxLocaltime_r() failed") );
339 }
340 else
341 {
342 time += (int)tz.GetOffset();
343
344#if defined(__VMS__) || defined(__WATCOMC__) // time is unsigned so avoid warning
345 int time2 = (int) time;
346 if ( time2 >= 0 )
347#else
348 if ( time >= 0 )
349#endif
350 {
351 tm = wxGmtime_r(&time, &tmstruct);
352
353 // should never happen
354 wxCHECK_MSG( tm, wxEmptyString, wxT("wxGmtime_r() failed") );
355 }
356 else
357 {
358 tm = (struct tm *)NULL;
359 }
360 }
361
362 if ( tm )
363 {
364 return CallStrftime(format, tm);
365 }
366 }
367 //else: use generic code below
368#endif // wxHAS_STRFTIME
369
370 // we only parse ANSI C format specifications here, no POSIX 2
371 // complications, no GNU extensions but we do add support for a "%l" format
372 // specifier allowing to get the number of milliseconds
373 Tm tm = GetTm(tz);
374
375 // used for calls to strftime() when we only deal with time
376 struct tm tmTimeOnly;
377 tmTimeOnly.tm_hour = tm.hour;
378 tmTimeOnly.tm_min = tm.min;
379 tmTimeOnly.tm_sec = tm.sec;
380 tmTimeOnly.tm_wday = 0;
381 tmTimeOnly.tm_yday = 0;
382 tmTimeOnly.tm_mday = 1; // any date will do
383 tmTimeOnly.tm_mon = 0;
384 tmTimeOnly.tm_year = 76;
385 tmTimeOnly.tm_isdst = 0; // no DST, we adjust for tz ourselves
386
387 wxString tmp, res, fmt;
388 for ( wxString::const_iterator p = format.begin(); p != format.end(); ++p )
389 {
390 if ( *p != wxT('%') )
391 {
392 // copy as is
393 res += *p;
394
395 continue;
396 }
397
398 // set the default format
399 switch ( (*++p).GetValue() )
400 {
401 case wxT('Y'): // year has 4 digits
402 fmt = wxT("%04d");
403 break;
404
405 case wxT('j'): // day of year has 3 digits
406 case wxT('l'): // milliseconds have 3 digits
407 fmt = wxT("%03d");
408 break;
409
410 case wxT('w'): // week day as number has only one
411 fmt = wxT("%d");
412 break;
413
414 default:
415 // it's either another valid format specifier in which case
416 // the format is "%02d" (for all the rest) or we have the
417 // field width preceding the format in which case it will
418 // override the default format anyhow
419 fmt = wxT("%02d");
420 }
421
422 bool restart = true;
423 while ( restart )
424 {
425 restart = false;
426
427 // start of the format specification
428 switch ( (*p).GetValue() )
429 {
430 case wxT('a'): // a weekday name
431 case wxT('A'):
432 // second parameter should be true for abbreviated names
433 res += GetWeekDayName(tm.GetWeekDay(),
434 *p == wxT('a') ? Name_Abbr : Name_Full);
435 break;
436
437 case wxT('b'): // a month name
438 case wxT('B'):
439 res += GetMonthName(tm.mon,
440 *p == wxT('b') ? Name_Abbr : Name_Full);
441 break;
442
443 case wxT('c'): // locale default date and time representation
444 case wxT('x'): // locale default date representation
445#ifdef wxHAS_STRFTIME
446 //
447 // the problem: there is no way to know what do these format
448 // specifications correspond to for the current locale.
449 //
450 // the solution: use a hack and still use strftime(): first
451 // find the YEAR which is a year in the strftime() range (1970
452 // - 2038) whose Jan 1 falls on the same week day as the Jan 1
453 // of the real year. Then make a copy of the format and
454 // replace all occurrences of YEAR in it with some unique
455 // string not appearing anywhere else in it, then use
456 // strftime() to format the date in year YEAR and then replace
457 // YEAR back by the real year and the unique replacement
458 // string back with YEAR. Notice that "all occurrences of YEAR"
459 // means all occurrences of 4 digit as well as 2 digit form!
460 //
461 // the bugs: we assume that neither of %c nor %x contains any
462 // fields which may change between the YEAR and real year. For
463 // example, the week number (%U, %W) and the day number (%j)
464 // will change if one of these years is leap and the other one
465 // is not!
466 {
467 // find the YEAR: normally, for any year X, Jan 1 of the
468 // year X + 28 is the same weekday as Jan 1 of X (because
469 // the weekday advances by 1 for each normal X and by 2
470 // for each leap X, hence by 5 every 4 years or by 35
471 // which is 0 mod 7 every 28 years) but this rule breaks
472 // down if there are years between X and Y which are
473 // divisible by 4 but not leap (i.e. divisible by 100 but
474 // not 400), hence the correction.
475
476 int yearReal = GetYear(tz);
477 int mod28 = yearReal % 28;
478
479 // be careful to not go too far - we risk to leave the
480 // supported range
481 int year;
482 if ( mod28 < 10 )
483 {
484 year = 1988 + mod28; // 1988 == 0 (mod 28)
485 }
486 else
487 {
488 year = 1970 + mod28 - 10; // 1970 == 10 (mod 28)
489 }
490
491 int nCentury = year / 100,
492 nCenturyReal = yearReal / 100;
493
494 // need to adjust for the years divisble by 400 which are
495 // not leap but are counted like leap ones if we just take
496 // the number of centuries in between for nLostWeekDays
497 int nLostWeekDays = (nCentury - nCenturyReal) -
498 (nCentury / 4 - nCenturyReal / 4);
499
500 // we have to gain back the "lost" weekdays: note that the
501 // effect of this loop is to not do anything to
502 // nLostWeekDays (which we won't use any more), but to
503 // (indirectly) set the year correctly
504 while ( (nLostWeekDays % 7) != 0 )
505 {
506 nLostWeekDays += year++ % 4 ? 1 : 2;
507 }
508
509 // finally move the year below 2000 so that the 2-digit
510 // year number can never match the month or day of the
511 // month when we do the replacements below
512 if ( year >= 2000 )
513 year -= 28;
514
515 wxASSERT_MSG( year >= 1970 && year < 2000,
516 wxT("logic error in wxDateTime::Format") );
517
518
519 // use strftime() to format the same date but in supported
520 // year
521 //
522 // NB: we assume that strftime() doesn't check for the
523 // date validity and will happily format the date
524 // corresponding to Feb 29 of a non leap year (which
525 // may happen if yearReal was leap and year is not)
526 struct tm tmAdjusted;
527 InitTm(tmAdjusted);
528 tmAdjusted.tm_hour = tm.hour;
529 tmAdjusted.tm_min = tm.min;
530 tmAdjusted.tm_sec = tm.sec;
531 tmAdjusted.tm_wday = tm.GetWeekDay();
532 tmAdjusted.tm_yday = GetDayOfYear();
533 tmAdjusted.tm_mday = tm.mday;
534 tmAdjusted.tm_mon = tm.mon;
535 tmAdjusted.tm_year = year - 1900;
536 tmAdjusted.tm_isdst = 0; // no DST, already adjusted
537 wxString str = CallStrftime(*p == wxT('c') ? wxT("%c")
538 : wxT("%x"),
539 &tmAdjusted);
540
541 // now replace the replacement year with the real year:
542 // notice that we have to replace the 4 digit year with
543 // a unique string not appearing in strftime() output
544 // first to prevent the 2 digit year from matching any
545 // substring of the 4 digit year (but any day, month,
546 // hours or minutes components should be safe because
547 // they are never in 70-99 range)
548 wxString replacement("|");
549 while ( str.find(replacement) != wxString::npos )
550 replacement += '|';
551
552 str.Replace(wxString::Format("%d", year),
553 replacement);
554 str.Replace(wxString::Format("%d", year % 100),
555 wxString::Format("%d", yearReal % 100));
556 str.Replace(replacement,
557 wxString::Format("%d", yearReal));
558
559 res += str;
560 }
561#else // !wxHAS_STRFTIME
562 // Use "%m/%d/%y %H:%M:%S" format instead
563 res += wxString::Format(wxT("%02d/%02d/%04d %02d:%02d:%02d"),
564 tm.mon+1,tm.mday, tm.year, tm.hour, tm.min, tm.sec);
565#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
566 break;
567
568 case wxT('d'): // day of a month (01-31)
569 res += wxString::Format(fmt, tm.mday);
570 break;
571
572 case wxT('H'): // hour in 24h format (00-23)
573 res += wxString::Format(fmt, tm.hour);
574 break;
575
576 case wxT('I'): // hour in 12h format (01-12)
577 {
578 // 24h -> 12h, 0h -> 12h too
579 int hour12 = tm.hour > 12 ? tm.hour - 12
580 : tm.hour ? tm.hour : 12;
581 res += wxString::Format(fmt, hour12);
582 }
583 break;
584
585 case wxT('j'): // day of the year
586 res += wxString::Format(fmt, GetDayOfYear(tz));
587 break;
588
589 case wxT('l'): // milliseconds (NOT STANDARD)
590 res += wxString::Format(fmt, GetMillisecond(tz));
591 break;
592
593 case wxT('m'): // month as a number (01-12)
594 res += wxString::Format(fmt, tm.mon + 1);
595 break;
596
597 case wxT('M'): // minute as a decimal number (00-59)
598 res += wxString::Format(fmt, tm.min);
599 break;
600
601 case wxT('p'): // AM or PM string
602#ifdef wxHAS_STRFTIME
603 res += CallStrftime(wxT("%p"), &tmTimeOnly);
604#else // !wxHAS_STRFTIME
605 res += (tmTimeOnly.tm_hour > 12) ? wxT("pm") : wxT("am");
606#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
607 break;
608
609 case wxT('S'): // second as a decimal number (00-61)
610 res += wxString::Format(fmt, tm.sec);
611 break;
612
613 case wxT('U'): // week number in the year (Sunday 1st week day)
614 res += wxString::Format(fmt, GetWeekOfYear(Sunday_First, tz));
615 break;
616
617 case wxT('W'): // week number in the year (Monday 1st week day)
618 res += wxString::Format(fmt, GetWeekOfYear(Monday_First, tz));
619 break;
620
621 case wxT('w'): // weekday as a number (0-6), Sunday = 0
622 res += wxString::Format(fmt, tm.GetWeekDay());
623 break;
624
625 // case wxT('x'): -- handled with "%c"
626
627 case wxT('X'): // locale default time representation
628 // just use strftime() to format the time for us
629#ifdef wxHAS_STRFTIME
630 res += CallStrftime(wxT("%X"), &tmTimeOnly);
631#else // !wxHAS_STRFTIME
632 res += wxString::Format(wxT("%02d:%02d:%02d"),tm.hour, tm.min, tm.sec);
633#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
634 break;
635
636 case wxT('y'): // year without century (00-99)
637 res += wxString::Format(fmt, tm.year % 100);
638 break;
639
640 case wxT('Y'): // year with century
641 res += wxString::Format(fmt, tm.year);
642 break;
643
644 case wxT('Z'): // timezone name
645#ifdef wxHAS_STRFTIME
646 res += CallStrftime(wxT("%Z"), &tmTimeOnly);
647#endif
648 break;
649
650 default:
651 // is it the format width?
652 fmt.Empty();
653 while ( *p == wxT('-') || *p == wxT('+') ||
654 *p == wxT(' ') || wxIsdigit(*p) )
655 {
656 fmt += *p;
657 }
658
659 if ( !fmt.empty() )
660 {
661 // we've only got the flags and width so far in fmt
662 fmt.Prepend(wxT('%'));
663 fmt.Append(wxT('d'));
664
665 restart = true;
666
667 break;
668 }
669
670 // no, it wasn't the width
671 wxFAIL_MSG(wxT("unknown format specificator"));
672
673 // fall through and just copy it nevertheless
674
675 case wxT('%'): // a percent sign
676 res += *p;
677 break;
678
679 case 0: // the end of string
680 wxFAIL_MSG(wxT("missing format at the end of string"));
681
682 // just put the '%' which was the last char in format
683 res += wxT('%');
684 break;
685 }
686 }
687 }
688
689 return res;
690}
691
692// this function parses a string in (strict) RFC 822 format: see the section 5
693// of the RFC for the detailed description, but briefly it's something of the
694// form "Sat, 18 Dec 1999 00:48:30 +0100"
695//
696// this function is "strict" by design - it must reject anything except true
697// RFC822 time specs.
698bool
699wxDateTime::ParseRfc822Date(const wxString& date, wxString::const_iterator *end)
700{
701 const wxString::const_iterator pEnd = date.end();
702 wxString::const_iterator p = date.begin();
703
704 // 1. week day
705 const wxDateTime::WeekDay
706 wd = GetWeekDayFromName(p, pEnd, Name_Abbr, DateLang_English);
707 if ( wd == Inv_WeekDay )
708 return false;
709 //else: ignore week day for now, we could also check that it really
710 // corresponds to the specified date
711
712 // 2. separating comma
713 if ( *p++ != ',' || *p++ != ' ' )
714 return false;
715
716 // 3. day number
717 if ( !wxIsdigit(*p) )
718 return false;
719
720 wxDateTime_t day = (wxDateTime_t)(*p++ - '0');
721 if ( wxIsdigit(*p) )
722 {
723 day *= 10;
724 day = (wxDateTime_t)(day + (*p++ - '0'));
725 }
726
727 if ( *p++ != ' ' )
728 return false;
729
730 // 4. month name
731 const Month mon = GetMonthFromName(p, pEnd, Name_Abbr, DateLang_English);
732 if ( mon == Inv_Month )
733 return false;
734
735 if ( *p++ != ' ' )
736 return false;
737
738 // 5. year
739 if ( !wxIsdigit(*p) )
740 return false;
741
742 int year = *p++ - '0';
743 if ( !wxIsdigit(*p) ) // should have at least 2 digits in the year
744 return false;
745
746 year *= 10;
747 year += *p++ - '0';
748
749 // is it a 2 digit year (as per original RFC 822) or a 4 digit one?
750 if ( wxIsdigit(*p) )
751 {
752 year *= 10;
753 year += *p++ - '0';
754
755 if ( !wxIsdigit(*p) )
756 {
757 // no 3 digit years please
758 return false;
759 }
760
761 year *= 10;
762 year += *p++ - '0';
763 }
764
765 if ( *p++ != ' ' )
766 return false;
767
768 // 6. time in hh:mm:ss format with seconds being optional
769 if ( !wxIsdigit(*p) )
770 return false;
771
772 wxDateTime_t hour = (wxDateTime_t)(*p++ - '0');
773
774 if ( !wxIsdigit(*p) )
775 return false;
776
777 hour *= 10;
778 hour = (wxDateTime_t)(hour + (*p++ - '0'));
779
780 if ( *p++ != ':' )
781 return false;
782
783 if ( !wxIsdigit(*p) )
784 return false;
785
786 wxDateTime_t min = (wxDateTime_t)(*p++ - '0');
787
788 if ( !wxIsdigit(*p) )
789 return false;
790
791 min *= 10;
792 min += (wxDateTime_t)(*p++ - '0');
793
794 wxDateTime_t sec = 0;
795 if ( *p == ':' )
796 {
797 p++;
798 if ( !wxIsdigit(*p) )
799 return false;
800
801 sec = (wxDateTime_t)(*p++ - '0');
802
803 if ( !wxIsdigit(*p) )
804 return false;
805
806 sec *= 10;
807 sec += (wxDateTime_t)(*p++ - '0');
808 }
809
810 if ( *p++ != ' ' )
811 return false;
812
813 // 7. now the interesting part: the timezone
814 int offset = 0; // just to suppress warnings
815 if ( *p == '-' || *p == '+' )
816 {
817 // the explicit offset given: it has the form of hhmm
818 bool plus = *p++ == '+';
819
820 if ( !wxIsdigit(*p) || !wxIsdigit(*(p + 1)) )
821 return false;
822
823
824 // hours
825 offset = MIN_PER_HOUR*(10*(*p - '0') + (*(p + 1) - '0'));
826
827 p += 2;
828
829 if ( !wxIsdigit(*p) || !wxIsdigit(*(p + 1)) )
830 return false;
831
832 // minutes
833 offset += 10*(*p - '0') + (*(p + 1) - '0');
834
835 if ( !plus )
836 offset = -offset;
837
838 p += 2;
839 }
840 else // not numeric
841 {
842 // the symbolic timezone given: may be either military timezone or one
843 // of standard abbreviations
844 if ( !*(p + 1) )
845 {
846 // military: Z = UTC, J unused, A = -1, ..., Y = +12
847 static const int offsets[26] =
848 {
849 //A B C D E F G H I J K L M
850 -1, -2, -3, -4, -5, -6, -7, -8, -9, 0, -10, -11, -12,
851 //N O P R Q S T U V W Z Y Z
852 +1, +2, +3, +4, +5, +6, +7, +8, +9, +10, +11, +12, 0
853 };
854
855 if ( *p < wxT('A') || *p > wxT('Z') || *p == wxT('J') )
856 return false;
857
858 offset = offsets[*p++ - 'A'];
859 }
860 else
861 {
862 // abbreviation
863 const wxString tz(p, date.end());
864 if ( tz == wxT("UT") || tz == wxT("UTC") || tz == wxT("GMT") )
865 offset = 0;
866 else if ( tz == wxT("AST") )
867 offset = AST - GMT0;
868 else if ( tz == wxT("ADT") )
869 offset = ADT - GMT0;
870 else if ( tz == wxT("EST") )
871 offset = EST - GMT0;
872 else if ( tz == wxT("EDT") )
873 offset = EDT - GMT0;
874 else if ( tz == wxT("CST") )
875 offset = CST - GMT0;
876 else if ( tz == wxT("CDT") )
877 offset = CDT - GMT0;
878 else if ( tz == wxT("MST") )
879 offset = MST - GMT0;
880 else if ( tz == wxT("MDT") )
881 offset = MDT - GMT0;
882 else if ( tz == wxT("PST") )
883 offset = PST - GMT0;
884 else if ( tz == wxT("PDT") )
885 offset = PDT - GMT0;
886 else
887 return false;
888
889 p += tz.length();
890 }
891
892 // make it minutes
893 offset *= MIN_PER_HOUR;
894 }
895
896
897 // the spec was correct, construct the date from the values we found
898 Set(day, mon, year, hour, min, sec);
899 MakeFromTimezone(TimeZone::Make(offset*SEC_PER_MIN));
900
901 if ( end )
902 *end = p;
903
904 return true;
905}
906
907bool
908wxDateTime::ParseFormat(const wxString& date,
909 const wxString& format,
910 const wxDateTime& dateDef,
911 wxString::const_iterator *endParse)
912{
913 wxCHECK_MSG( !format.empty(), false, "format can't be empty" );
914 wxCHECK_MSG( endParse, false, "end iterator pointer must be specified" );
915
916 wxString str;
917 unsigned long num;
918
919 // what fields have we found?
920 bool haveWDay = false,
921 haveYDay = false,
922 haveDay = false,
923 haveMon = false,
924 haveYear = false,
925 haveHour = false,
926 haveMin = false,
927 haveSec = false,
928 haveMsec = false;
929
930 bool hourIsIn12hFormat = false, // or in 24h one?
931 isPM = false; // AM by default
932
933 // and the value of the items we have (init them to get rid of warnings)
934 wxDateTime_t msec = 0,
935 sec = 0,
936 min = 0,
937 hour = 0;
938 WeekDay wday = Inv_WeekDay;
939 wxDateTime_t yday = 0,
940 mday = 0;
941 wxDateTime::Month mon = Inv_Month;
942 int year = 0;
943
944 wxString::const_iterator input = date.begin();
945 const wxString::const_iterator end = date.end();
946 for ( wxString::const_iterator fmt = format.begin(); fmt != format.end(); ++fmt )
947 {
948 if ( *fmt != wxT('%') )
949 {
950 if ( wxIsspace(*fmt) )
951 {
952 // a white space in the format string matches 0 or more white
953 // spaces in the input
954 while ( input != end && wxIsspace(*input) )
955 {
956 input++;
957 }
958 }
959 else // !space
960 {
961 // any other character (not whitespace, not '%') must be
962 // matched by itself in the input
963 if ( input == end || *input++ != *fmt )
964 {
965 // no match
966 return false;
967 }
968 }
969
970 // done with this format char
971 continue;
972 }
973
974 // start of a format specification
975
976 // parse the optional width
977 size_t width = 0;
978 while ( wxIsdigit(*++fmt) )
979 {
980 width *= 10;
981 width += *fmt - '0';
982 }
983
984 // the default widths for the various fields
985 if ( !width )
986 {
987 switch ( (*fmt).GetValue() )
988 {
989 case wxT('Y'): // year has 4 digits
990 width = 4;
991 break;
992
993 case wxT('j'): // day of year has 3 digits
994 case wxT('l'): // milliseconds have 3 digits
995 width = 3;
996 break;
997
998 case wxT('w'): // week day as number has only one
999 width = 1;
1000 break;
1001
1002 default:
1003 // default for all other fields
1004 width = 2;
1005 }
1006 }
1007
1008 // then the format itself
1009 switch ( (*fmt).GetValue() )
1010 {
1011 case wxT('a'): // a weekday name
1012 case wxT('A'):
1013 {
1014 wday = GetWeekDayFromName
1015 (
1016 input, end,
1017 *fmt == 'a' ? Name_Abbr : Name_Full,
1018 DateLang_Local
1019 );
1020 if ( wday == Inv_WeekDay )
1021 {
1022 // no match
1023 return false;
1024 }
1025 }
1026 haveWDay = true;
1027 break;
1028
1029 case wxT('b'): // a month name
1030 case wxT('B'):
1031 {
1032 mon = GetMonthFromName
1033 (
1034 input, end,
1035 *fmt == 'b' ? Name_Abbr : Name_Full,
1036 DateLang_Local
1037 );
1038 if ( mon == Inv_Month )
1039 {
1040 // no match
1041 return false;
1042 }
1043 }
1044 haveMon = true;
1045 break;
1046
1047 case wxT('c'): // locale default date and time representation
1048 {
1049 wxDateTime dt;
1050
1051#if wxUSE_INTL
1052 const wxString
1053 fmtDateTime = wxLocale::GetInfo(wxLOCALE_DATE_TIME_FMT);
1054 if ( !fmtDateTime.empty() )
1055 dt = ParseFormatAt(input, end, fmtDateTime);
1056#endif // wxUSE_INTL
1057 if ( !dt.IsValid() )
1058 {
1059 // also try the format which corresponds to ctime()
1060 // output (i.e. the "C" locale default)
1061 dt = ParseFormatAt(input, end, wxS("%a %b %d %H:%M:%S %Y"));
1062 }
1063
1064 if ( !dt.IsValid() )
1065 {
1066 // and finally also the two generic date/time formats
1067 dt = ParseFormatAt(input, end, wxS("%x %X"), wxS("%X %x"));
1068 }
1069
1070 if ( !dt.IsValid() )
1071 return false;
1072
1073 const Tm tm = dt.GetTm();
1074
1075 hour = tm.hour;
1076 min = tm.min;
1077 sec = tm.sec;
1078
1079 year = tm.year;
1080 mon = tm.mon;
1081 mday = tm.mday;
1082
1083 haveDay = haveMon = haveYear =
1084 haveHour = haveMin = haveSec = true;
1085 }
1086 break;
1087
1088 case wxT('d'): // day of a month (01-31)
1089 case 'e': // day of a month (1-31) (GNU extension)
1090 if ( !GetNumericToken(width, input, end, &num) ||
1091 (num > 31) || (num < 1) )
1092 {
1093 // no match
1094 return false;
1095 }
1096
1097 // we can't check whether the day range is correct yet, will
1098 // do it later - assume ok for now
1099 haveDay = true;
1100 mday = (wxDateTime_t)num;
1101 break;
1102
1103 case wxT('H'): // hour in 24h format (00-23)
1104 if ( !GetNumericToken(width, input, end, &num) || (num > 23) )
1105 {
1106 // no match
1107 return false;
1108 }
1109
1110 haveHour = true;
1111 hour = (wxDateTime_t)num;
1112 break;
1113
1114 case wxT('I'): // hour in 12h format (01-12)
1115 if ( !GetNumericToken(width, input, end, &num) ||
1116 !num || (num > 12) )
1117 {
1118 // no match
1119 return false;
1120 }
1121
1122 haveHour = true;
1123 hourIsIn12hFormat = true;
1124 hour = (wxDateTime_t)(num % 12); // 12 should be 0
1125 break;
1126
1127 case wxT('j'): // day of the year
1128 if ( !GetNumericToken(width, input, end, &num) ||
1129 !num || (num > 366) )
1130 {
1131 // no match
1132 return false;
1133 }
1134
1135 haveYDay = true;
1136 yday = (wxDateTime_t)num;
1137 break;
1138
1139 case wxT('l'): // milliseconds (0-999)
1140 if ( !GetNumericToken(width, input, end, &num) )
1141 return false;
1142
1143 haveMsec = true;
1144 msec = (wxDateTime_t)num;
1145 break;
1146
1147 case wxT('m'): // month as a number (01-12)
1148 if ( !GetNumericToken(width, input, end, &num) ||
1149 !num || (num > 12) )
1150 {
1151 // no match
1152 return false;
1153 }
1154
1155 haveMon = true;
1156 mon = (Month)(num - 1);
1157 break;
1158
1159 case wxT('M'): // minute as a decimal number (00-59)
1160 if ( !GetNumericToken(width, input, end, &num) ||
1161 (num > 59) )
1162 {
1163 // no match
1164 return false;
1165 }
1166
1167 haveMin = true;
1168 min = (wxDateTime_t)num;
1169 break;
1170
1171 case wxT('p'): // AM or PM string
1172 {
1173 wxString am, pm;
1174 GetAmPmStrings(&am, &pm);
1175
1176 // we can never match %p in locales which don't use AM/PM
1177 if ( am.empty() || pm.empty() )
1178 return false;
1179
1180 const size_t pos = input - date.begin();
1181 if ( date.compare(pos, pm.length(), pm) == 0 )
1182 {
1183 isPM = true;
1184 input += pm.length();
1185 }
1186 else if ( date.compare(pos, am.length(), am) == 0 )
1187 {
1188 input += am.length();
1189 }
1190 else // no match
1191 {
1192 return false;
1193 }
1194 }
1195 break;
1196
1197 case wxT('r'): // time as %I:%M:%S %p
1198 {
1199 wxDateTime dt;
1200 if ( !dt.ParseFormat(wxString(input, end),
1201 wxS("%I:%M:%S %p"), &input) )
1202 return false;
1203
1204 haveHour = haveMin = haveSec = true;
1205
1206 const Tm tm = dt.GetTm();
1207 hour = tm.hour;
1208 min = tm.min;
1209 sec = tm.sec;
1210 }
1211 break;
1212
1213 case wxT('R'): // time as %H:%M
1214 {
1215 const wxDateTime
1216 dt = ParseFormatAt(input, end, wxS("%H:%M"));
1217 if ( !dt.IsValid() )
1218 return false;
1219
1220 haveHour =
1221 haveMin = true;
1222
1223 const Tm tm = dt.GetTm();
1224 hour = tm.hour;
1225 min = tm.min;
1226 }
1227 break;
1228
1229 case wxT('S'): // second as a decimal number (00-61)
1230 if ( !GetNumericToken(width, input, end, &num) ||
1231 (num > 61) )
1232 {
1233 // no match
1234 return false;
1235 }
1236
1237 haveSec = true;
1238 sec = (wxDateTime_t)num;
1239 break;
1240
1241 case wxT('T'): // time as %H:%M:%S
1242 {
1243 const wxDateTime
1244 dt = ParseFormatAt(input, end, wxS("%H:%M:%S"));
1245 if ( !dt.IsValid() )
1246 return false;
1247
1248 haveHour =
1249 haveMin =
1250 haveSec = true;
1251
1252 const Tm tm = dt.GetTm();
1253 hour = tm.hour;
1254 min = tm.min;
1255 sec = tm.sec;
1256 }
1257 break;
1258
1259 case wxT('w'): // weekday as a number (0-6), Sunday = 0
1260 if ( !GetNumericToken(width, input, end, &num) ||
1261 (wday > 6) )
1262 {
1263 // no match
1264 return false;
1265 }
1266
1267 haveWDay = true;
1268 wday = (WeekDay)num;
1269 break;
1270
1271 case wxT('x'): // locale default date representation
1272 {
1273#if wxUSE_INTL
1274 wxString
1275 fmtDate = wxLocale::GetInfo(wxLOCALE_SHORT_DATE_FMT),
1276 fmtDateAlt = wxLocale::GetInfo(wxLOCALE_LONG_DATE_FMT);
1277#else // !wxUSE_INTL
1278 wxString fmtDate, fmtDateAlt;
1279#endif // wxUSE_INTL/!wxUSE_INTL
1280 if ( fmtDate.empty() )
1281 {
1282 if ( IsWestEuropeanCountry(GetCountry()) ||
1283 GetCountry() == Russia )
1284 {
1285 fmtDate = wxS("%d/%m/%Y");
1286 fmtDateAlt = wxS("%m/%d/%Y");
1287 }
1288 else // assume USA
1289 {
1290 fmtDate = wxS("%m/%d/%Y");
1291 fmtDateAlt = wxS("%d/%m/%Y");
1292 }
1293 }
1294
1295 wxDateTime
1296 dt = ParseFormatAt(input, end, fmtDate, fmtDateAlt);
1297
1298 if ( !dt.IsValid() )
1299 {
1300 // try with short years too
1301 fmtDate.Replace("%Y","%y");
1302 fmtDateAlt.Replace("%Y","%y");
1303 dt = ParseFormatAt(input, end, fmtDate, fmtDateAlt);
1304
1305 if ( !dt.IsValid() )
1306 return false;
1307 }
1308
1309 const Tm tm = dt.GetTm();
1310
1311 haveDay =
1312 haveMon =
1313 haveYear = true;
1314
1315 year = tm.year;
1316 mon = tm.mon;
1317 mday = tm.mday;
1318 }
1319
1320 break;
1321
1322 case wxT('X'): // locale default time representation
1323 {
1324#if wxUSE_INTL
1325 wxString fmtTime = wxLocale::GetInfo(wxLOCALE_TIME_FMT),
1326 fmtTimeAlt;
1327#else // !wxUSE_INTL
1328 wxString fmtTime, fmtTimeAlt;
1329#endif // wxUSE_INTL/!wxUSE_INTL
1330 if ( fmtTime.empty() )
1331 {
1332 // try to parse what follows as "%H:%M:%S" and, if this
1333 // fails, as "%I:%M:%S %p" - this should catch the most
1334 // common cases
1335 fmtTime = "%T";
1336 fmtTimeAlt = "%r";
1337 }
1338
1339 const wxDateTime
1340 dt = ParseFormatAt(input, end, fmtTime, fmtTimeAlt);
1341 if ( !dt.IsValid() )
1342 return false;
1343
1344 haveHour =
1345 haveMin =
1346 haveSec = true;
1347
1348 const Tm tm = dt.GetTm();
1349 hour = tm.hour;
1350 min = tm.min;
1351 sec = tm.sec;
1352 }
1353 break;
1354
1355 case wxT('y'): // year without century (00-99)
1356 if ( !GetNumericToken(width, input, end, &num) ||
1357 (num > 99) )
1358 {
1359 // no match
1360 return false;
1361 }
1362
1363 haveYear = true;
1364
1365 // TODO should have an option for roll over date instead of
1366 // hard coding it here
1367 year = (num > 30 ? 1900 : 2000) + (wxDateTime_t)num;
1368 break;
1369
1370 case wxT('Y'): // year with century
1371 if ( !GetNumericToken(width, input, end, &num) )
1372 {
1373 // no match
1374 return false;
1375 }
1376
1377 haveYear = true;
1378 year = (wxDateTime_t)num;
1379 break;
1380
1381 case wxT('Z'): // timezone name
1382 // FIXME: currently we just ignore everything that looks like a
1383 // time zone here
1384 GetAlphaToken(input, end);
1385 break;
1386
1387 case wxT('%'): // a percent sign
1388 if ( *input++ != wxT('%') )
1389 {
1390 // no match
1391 return false;
1392 }
1393 break;
1394
1395 case 0: // the end of string
1396 wxFAIL_MSG(wxT("unexpected format end"));
1397
1398 // fall through
1399
1400 default: // not a known format spec
1401 return false;
1402 }
1403 }
1404
1405 // format matched, try to construct a date from what we have now
1406 Tm tmDef;
1407 if ( dateDef.IsValid() )
1408 {
1409 // take this date as default
1410 tmDef = dateDef.GetTm();
1411 }
1412 else if ( IsValid() )
1413 {
1414 // if this date is valid, don't change it
1415 tmDef = GetTm();
1416 }
1417 else
1418 {
1419 // no default and this date is invalid - fall back to Today()
1420 tmDef = Today().GetTm();
1421 }
1422
1423 Tm tm = tmDef;
1424
1425 // set the date
1426 if ( haveMon )
1427 {
1428 tm.mon = mon;
1429 }
1430
1431 if ( haveYear )
1432 {
1433 tm.year = year;
1434 }
1435
1436 // TODO we don't check here that the values are consistent, if both year
1437 // day and month/day were found, we just ignore the year day and we
1438 // also always ignore the week day
1439 if ( haveDay )
1440 {
1441 if ( mday > GetNumberOfDays(tm.mon, tm.year) )
1442 return false;
1443
1444 tm.mday = mday;
1445 }
1446 else if ( haveYDay )
1447 {
1448 if ( yday > GetNumberOfDays(tm.year) )
1449 return false;
1450
1451 Tm tm2 = wxDateTime(1, Jan, tm.year).SetToYearDay(yday).GetTm();
1452
1453 tm.mon = tm2.mon;
1454 tm.mday = tm2.mday;
1455 }
1456
1457 // deal with AM/PM
1458 if ( haveHour && hourIsIn12hFormat && isPM )
1459 {
1460 // translate to 24hour format
1461 hour += 12;
1462 }
1463 //else: either already in 24h format or no translation needed
1464
1465 // set the time
1466 if ( haveHour )
1467 {
1468 tm.hour = hour;
1469 }
1470
1471 if ( haveMin )
1472 {
1473 tm.min = min;
1474 }
1475
1476 if ( haveSec )
1477 {
1478 tm.sec = sec;
1479 }
1480
1481 if ( haveMsec )
1482 tm.msec = msec;
1483
1484 Set(tm);
1485
1486 // finally check that the week day is consistent -- if we had it
1487 if ( haveWDay && GetWeekDay() != wday )
1488 return false;
1489
1490 *endParse = input;
1491
1492 return true;
1493}
1494
1495bool
1496wxDateTime::ParseDateTime(const wxString& date, wxString::const_iterator *end)
1497{
1498 wxCHECK_MSG( end, false, "end iterator pointer must be specified" );
1499
1500 wxDateTime
1501 dtDate,
1502 dtTime;
1503
1504 wxString::const_iterator
1505 endTime,
1506 endDate,
1507 endBoth;
1508
1509 // If we got a date in the beginning, see if there is a time specified
1510 // after the date
1511 if ( dtDate.ParseDate(date, &endDate) )
1512 {
1513 // Skip spaces, as the ParseTime() function fails on spaces
1514 while ( endDate != date.end() && wxIsspace(*endDate) )
1515 ++endDate;
1516
1517 const wxString timestr(endDate, date.end());
1518 if ( !dtTime.ParseTime(timestr, &endTime) )
1519 return false;
1520
1521 endBoth = endDate + (endTime - timestr.begin());
1522 }
1523 else // no date in the beginning
1524 {
1525 // check if we have a time followed by a date
1526 if ( !dtTime.ParseTime(date, &endTime) )
1527 return false;
1528
1529 while ( endTime != date.end() && wxIsspace(*endTime) )
1530 ++endTime;
1531
1532 const wxString datestr(endTime, date.end());
1533 if ( !dtDate.ParseDate(datestr, &endDate) )
1534 return false;
1535
1536 endBoth = endTime + (endDate - datestr.begin());
1537 }
1538
1539 Set(dtDate.GetDay(), dtDate.GetMonth(), dtDate.GetYear(),
1540 dtTime.GetHour(), dtTime.GetMinute(), dtTime.GetSecond(),
1541 dtTime.GetMillisecond());
1542
1543 *end = endBoth;
1544
1545 return true;
1546}
1547
1548bool
1549wxDateTime::ParseDate(const wxString& date, wxString::const_iterator *end)
1550{
1551 wxCHECK_MSG( end, false, "end iterator pointer must be specified" );
1552
1553 // this is a simplified version of ParseDateTime() which understands only
1554 // "today" (for wxDate compatibility) and digits only otherwise (and not
1555 // all esoteric constructions ParseDateTime() knows about)
1556
1557 const wxString::const_iterator pBegin = date.begin();
1558 const wxString::const_iterator pEnd = date.end();
1559
1560 wxString::const_iterator p = pBegin;
1561 while ( p != pEnd && wxIsspace(*p) )
1562 p++;
1563
1564 // some special cases
1565 static struct
1566 {
1567 const char *str;
1568 int dayDiffFromToday;
1569 } literalDates[] =
1570 {
1571 { wxTRANSLATE("today"), 0 },
1572 { wxTRANSLATE("yesterday"), -1 },
1573 { wxTRANSLATE("tomorrow"), 1 },
1574 };
1575
1576 const size_t lenRest = pEnd - p;
1577 for ( size_t n = 0; n < WXSIZEOF(literalDates); n++ )
1578 {
1579 const wxString dateStr = wxGetTranslation(literalDates[n].str);
1580 size_t len = dateStr.length();
1581
1582 if ( len > lenRest )
1583 continue;
1584
1585 const wxString::const_iterator pEnd = p + len;
1586 if ( wxString(p, pEnd).CmpNoCase(dateStr) == 0 )
1587 {
1588 // nothing can follow this, so stop here
1589
1590 p = pEnd;
1591
1592 int dayDiffFromToday = literalDates[n].dayDiffFromToday;
1593 *this = Today();
1594 if ( dayDiffFromToday )
1595 {
1596 *this += wxDateSpan::Days(dayDiffFromToday);
1597 }
1598
1599 *end = pEnd;
1600
1601 return true;
1602 }
1603 }
1604
1605 // We try to guess what we have here: for each new (numeric) token, we
1606 // determine if it can be a month, day or a year. Of course, there is an
1607 // ambiguity as some numbers may be days as well as months, so we also
1608 // have the ability to back track.
1609
1610 // what do we have?
1611 bool haveDay = false, // the months day?
1612 haveWDay = false, // the day of week?
1613 haveMon = false, // the month?
1614 haveYear = false; // the year?
1615
1616 bool monWasNumeric = false; // was month specified as a number?
1617
1618 // and the value of the items we have (init them to get rid of warnings)
1619 WeekDay wday = Inv_WeekDay;
1620 wxDateTime_t day = 0;
1621 wxDateTime::Month mon = Inv_Month;
1622 int year = 0;
1623
1624 // tokenize the string
1625 while ( p != pEnd )
1626 {
1627 // skip white space and date delimiters
1628 while ( wxStrchr(".,/-\t\r\n ", *p) )
1629 {
1630 ++p;
1631 }
1632
1633 // modify copy of the iterator as we're not sure if the next token is
1634 // still part of the date at all
1635 wxString::const_iterator pCopy = p;
1636
1637 // we can have either alphabetic or numeric token, start by testing if
1638 // it's the latter
1639 unsigned long val;
1640 if ( GetNumericToken(10 /* max length */, pCopy, pEnd, &val) )
1641 {
1642 // guess what this number is
1643
1644 bool isDay = false,
1645 isMonth = false,
1646 isYear = false;
1647
1648 if ( !haveMon && val > 0 && val <= 12 )
1649 {
1650 // assume it is month
1651 isMonth = true;
1652 }
1653 else // not the month
1654 {
1655 if ( haveDay )
1656 {
1657 // this can only be the year
1658 isYear = true;
1659 }
1660 else // may be either day or year
1661 {
1662 // use a leap year if we don't have the year yet to allow
1663 // dates like 2/29/1976 which would be rejected otherwise
1664 wxDateTime_t max_days = (wxDateTime_t)(
1665 haveMon
1666 ? GetNumberOfDays(mon, haveYear ? year : 1976)
1667 : 31
1668 );
1669
1670 // can it be day?
1671 if ( (val == 0) || (val > (unsigned long)max_days) )
1672 {
1673 // no
1674 isYear = true;
1675 }
1676 else // yes, suppose it's the day
1677 {
1678 isDay = true;
1679 }
1680 }
1681 }
1682
1683 if ( isYear )
1684 {
1685 if ( haveYear )
1686 break;
1687
1688 haveYear = true;
1689
1690 year = (wxDateTime_t)val;
1691 }
1692 else if ( isDay )
1693 {
1694 if ( haveDay )
1695 break;
1696
1697 haveDay = true;
1698
1699 day = (wxDateTime_t)val;
1700 }
1701 else if ( isMonth )
1702 {
1703 haveMon = true;
1704 monWasNumeric = true;
1705
1706 mon = (Month)(val - 1);
1707 }
1708 }
1709 else // not a number
1710 {
1711 // be careful not to overwrite the current mon value
1712 Month mon2 = GetMonthFromName
1713 (
1714 pCopy, pEnd,
1715 Name_Full | Name_Abbr,
1716 DateLang_Local | DateLang_English
1717 );
1718 if ( mon2 != Inv_Month )
1719 {
1720 // it's a month
1721 if ( haveMon )
1722 {
1723 // but we already have a month - maybe we guessed wrong
1724 // when we had interpreted that numeric value as a month
1725 // and it was the day number instead?
1726 if ( haveDay || !monWasNumeric )
1727 break;
1728
1729 // assume we did and change our mind: reinterpret the month
1730 // value as a day (notice that there is no need to check
1731 // that it is valid as month values are always < 12, but
1732 // the days are counted from 1 unlike the months)
1733 day = (wxDateTime_t)(mon + 1);
1734 haveDay = true;
1735 }
1736
1737 mon = mon2;
1738
1739 haveMon = true;
1740 }
1741 else // not a valid month name
1742 {
1743 WeekDay wday2 = GetWeekDayFromName
1744 (
1745 pCopy, pEnd,
1746 Name_Full | Name_Abbr,
1747 DateLang_Local | DateLang_English
1748 );
1749 if ( wday2 != Inv_WeekDay )
1750 {
1751 // a week day
1752 if ( haveWDay )
1753 break;
1754
1755 wday = wday2;
1756
1757 haveWDay = true;
1758 }
1759 else // not a valid weekday name
1760 {
1761 // try the ordinals
1762 static const char *const ordinals[] =
1763 {
1764 wxTRANSLATE("first"),
1765 wxTRANSLATE("second"),
1766 wxTRANSLATE("third"),
1767 wxTRANSLATE("fourth"),
1768 wxTRANSLATE("fifth"),
1769 wxTRANSLATE("sixth"),
1770 wxTRANSLATE("seventh"),
1771 wxTRANSLATE("eighth"),
1772 wxTRANSLATE("ninth"),
1773 wxTRANSLATE("tenth"),
1774 wxTRANSLATE("eleventh"),
1775 wxTRANSLATE("twelfth"),
1776 wxTRANSLATE("thirteenth"),
1777 wxTRANSLATE("fourteenth"),
1778 wxTRANSLATE("fifteenth"),
1779 wxTRANSLATE("sixteenth"),
1780 wxTRANSLATE("seventeenth"),
1781 wxTRANSLATE("eighteenth"),
1782 wxTRANSLATE("nineteenth"),
1783 wxTRANSLATE("twentieth"),
1784 // that's enough - otherwise we'd have problems with
1785 // composite (or not) ordinals
1786 };
1787
1788 size_t n;
1789 for ( n = 0; n < WXSIZEOF(ordinals); n++ )
1790 {
1791 const wxString ord = wxGetTranslation(ordinals[n]);
1792 const size_t len = ord.length();
1793 if ( date.compare(p - pBegin, len, ord) == 0 )
1794 {
1795 p += len;
1796 break;
1797 }
1798 }
1799
1800 if ( n == WXSIZEOF(ordinals) )
1801 {
1802 // stop here - something unknown
1803 break;
1804 }
1805
1806 // it's a day
1807 if ( haveDay )
1808 {
1809 // don't try anything here (as in case of numeric day
1810 // above) - the symbolic day spec should always
1811 // precede the month/year
1812 break;
1813 }
1814
1815 haveDay = true;
1816
1817 day = (wxDateTime_t)(n + 1);
1818 }
1819 }
1820 }
1821
1822 // advance iterator past a successfully parsed token
1823 p = pCopy;
1824 }
1825
1826 // either no more tokens or the scan was stopped by something we couldn't
1827 // parse - in any case, see if we can construct a date from what we have
1828 if ( !haveDay && !haveWDay )
1829 return false;
1830
1831 if ( haveWDay && (haveMon || haveYear || haveDay) &&
1832 !(haveDay && haveMon && haveYear) )
1833 {
1834 // without adjectives (which we don't support here) the week day only
1835 // makes sense completely separately or with the full date
1836 // specification (what would "Wed 1999" mean?)
1837 return false;
1838 }
1839
1840 if ( !haveWDay && haveYear && !(haveDay && haveMon) )
1841 {
1842 // may be we have month and day instead of day and year?
1843 if ( haveDay && !haveMon )
1844 {
1845 if ( day <= 12 )
1846 {
1847 // exchange day and month
1848 mon = (wxDateTime::Month)(day - 1);
1849
1850 // we're in the current year then
1851 if ( (year > 0) && (year <= (int)GetNumberOfDays(mon, Inv_Year)) )
1852 {
1853 day = (wxDateTime_t)year;
1854
1855 haveMon = true;
1856 haveYear = false;
1857 }
1858 //else: no, can't exchange, leave haveMon == false
1859 }
1860 }
1861
1862 if ( !haveMon )
1863 return false;
1864 }
1865
1866 if ( !haveMon )
1867 {
1868 mon = GetCurrentMonth();
1869 }
1870
1871 if ( !haveYear )
1872 {
1873 year = GetCurrentYear();
1874 }
1875
1876 if ( haveDay )
1877 {
1878 // normally we check the day above but the check is optimistic in case
1879 // we find the day before its month/year so we have to redo it now
1880 if ( day > GetNumberOfDays(mon, year) )
1881 return false;
1882
1883 Set(day, mon, year);
1884
1885 if ( haveWDay )
1886 {
1887 // check that it is really the same
1888 if ( GetWeekDay() != wday )
1889 return false;
1890 }
1891 }
1892 else // haveWDay
1893 {
1894 *this = Today();
1895
1896 SetToWeekDayInSameWeek(wday);
1897 }
1898
1899 *end = p;
1900
1901 return true;
1902}
1903
1904bool
1905wxDateTime::ParseTime(const wxString& time, wxString::const_iterator *end)
1906{
1907 wxCHECK_MSG( end, false, "end iterator pointer must be specified" );
1908
1909 // first try some extra things
1910 static const struct
1911 {
1912 const char *name;
1913 wxDateTime_t hour;
1914 } stdTimes[] =
1915 {
1916 { wxTRANSLATE("noon"), 12 },
1917 { wxTRANSLATE("midnight"), 00 },
1918 // anything else?
1919 };
1920
1921 for ( size_t n = 0; n < WXSIZEOF(stdTimes); n++ )
1922 {
1923 const wxString timeString = wxGetTranslation(stdTimes[n].name);
1924 if ( timeString.CmpNoCase(wxString(time, timeString.length())) == 0 )
1925 {
1926 // casts required by DigitalMars
1927 Set(stdTimes[n].hour, wxDateTime_t(0), wxDateTime_t(0));
1928
1929 if ( end )
1930 *end = time.begin() + timeString.length();
1931
1932 return true;
1933 }
1934 }
1935
1936 // try all time formats we may think about in the order from longest to
1937 // shortest
1938 static const char *const timeFormats[] =
1939 {
1940 "%I:%M:%S %p", // 12hour with AM/PM
1941 "%H:%M:%S", // could be the same or 24 hour one so try it too
1942 "%I:%M %p", // 12hour with AM/PM but without seconds
1943 "%H:%M", // and a possibly 24 hour version without seconds
1944 "%X", // possibly something from above or maybe something
1945 // completely different -- try it last
1946
1947 // TODO: parse timezones
1948 };
1949
1950 for ( size_t nFmt = 0; nFmt < WXSIZEOF(timeFormats); nFmt++ )
1951 {
1952 if ( ParseFormat(time, timeFormats[nFmt], end) )
1953 return true;
1954 }
1955
1956 return false;
1957}
1958
1959// ----------------------------------------------------------------------------
1960// Workdays and holidays support
1961// ----------------------------------------------------------------------------
1962
1963bool wxDateTime::IsWorkDay(Country WXUNUSED(country)) const
1964{
1965 return !wxDateTimeHolidayAuthority::IsHoliday(*this);
1966}
1967
1968// ============================================================================
1969// wxDateSpan
1970// ============================================================================
1971
1972wxDateSpan WXDLLIMPEXP_BASE operator*(int n, const wxDateSpan& ds)
1973{
1974 wxDateSpan ds1(ds);
1975 return ds1.Multiply(n);
1976}
1977
1978// ============================================================================
1979// wxTimeSpan
1980// ============================================================================
1981
1982wxTimeSpan WXDLLIMPEXP_BASE operator*(int n, const wxTimeSpan& ts)
1983{
1984 return wxTimeSpan(ts).Multiply(n);
1985}
1986
1987// this enum is only used in wxTimeSpan::Format() below but we can't declare
1988// it locally to the method as it provokes an internal compiler error in egcs
1989// 2.91.60 when building with -O2
1990enum TimeSpanPart
1991{
1992 Part_Week,
1993 Part_Day,
1994 Part_Hour,
1995 Part_Min,
1996 Part_Sec,
1997 Part_MSec
1998};
1999
2000// not all strftime(3) format specifiers make sense here because, for example,
2001// a time span doesn't have a year nor a timezone
2002//
2003// Here are the ones which are supported (all of them are supported by strftime
2004// as well):
2005// %H hour in 24 hour format
2006// %M minute (00 - 59)
2007// %S second (00 - 59)
2008// %% percent sign
2009//
2010// Also, for MFC CTimeSpan compatibility, we support
2011// %D number of days
2012//
2013// And, to be better than MFC :-), we also have
2014// %E number of wEeks
2015// %l milliseconds (000 - 999)
2016wxString wxTimeSpan::Format(const wxString& format) const
2017{
2018 // we deal with only positive time spans here and just add the sign in
2019 // front for the negative ones
2020 if ( IsNegative() )
2021 {
2022 wxString str(Negate().Format(format));
2023 return "-" + str;
2024 }
2025
2026 wxCHECK_MSG( !format.empty(), wxEmptyString,
2027 wxT("NULL format in wxTimeSpan::Format") );
2028
2029 wxString str;
2030 str.Alloc(format.length());
2031
2032 // Suppose we have wxTimeSpan ts(1 /* hour */, 2 /* min */, 3 /* sec */)
2033 //
2034 // Then, of course, ts.Format("%H:%M:%S") must return "01:02:03", but the
2035 // question is what should ts.Format("%S") do? The code here returns "3273"
2036 // in this case (i.e. the total number of seconds, not just seconds % 60)
2037 // because, for me, this call means "give me entire time interval in
2038 // seconds" and not "give me the seconds part of the time interval"
2039 //
2040 // If we agree that it should behave like this, it is clear that the
2041 // interpretation of each format specifier depends on the presence of the
2042 // other format specs in the string: if there was "%H" before "%M", we
2043 // should use GetMinutes() % 60, otherwise just GetMinutes() &c
2044
2045 // we remember the most important unit found so far
2046 TimeSpanPart partBiggest = Part_MSec;
2047
2048 for ( wxString::const_iterator pch = format.begin(); pch != format.end(); ++pch )
2049 {
2050 wxChar ch = *pch;
2051
2052 if ( ch == wxT('%') )
2053 {
2054 // the start of the format specification of the printf() below
2055 wxString fmtPrefix(wxT('%'));
2056
2057 // the number
2058 long n;
2059
2060 // the number of digits for the format string, 0 if unused
2061 unsigned digits = 0;
2062
2063 ch = *++pch; // get the format spec char
2064 switch ( ch )
2065 {
2066 default:
2067 wxFAIL_MSG( wxT("invalid format character") );
2068 // fall through
2069
2070 case wxT('%'):
2071 str += ch;
2072
2073 // skip the part below switch
2074 continue;
2075
2076 case wxT('D'):
2077 n = GetDays();
2078 if ( partBiggest < Part_Day )
2079 {
2080 n %= DAYS_PER_WEEK;
2081 }
2082 else
2083 {
2084 partBiggest = Part_Day;
2085 }
2086 break;
2087
2088 case wxT('E'):
2089 partBiggest = Part_Week;
2090 n = GetWeeks();
2091 break;
2092
2093 case wxT('H'):
2094 n = GetHours();
2095 if ( partBiggest < Part_Hour )
2096 {
2097 n %= HOURS_PER_DAY;
2098 }
2099 else
2100 {
2101 partBiggest = Part_Hour;
2102 }
2103
2104 digits = 2;
2105 break;
2106
2107 case wxT('l'):
2108 n = GetMilliseconds().ToLong();
2109 if ( partBiggest < Part_MSec )
2110 {
2111 n %= 1000;
2112 }
2113 //else: no need to reset partBiggest to Part_MSec, it is
2114 // the least significant one anyhow
2115
2116 digits = 3;
2117 break;
2118
2119 case wxT('M'):
2120 n = GetMinutes();
2121 if ( partBiggest < Part_Min )
2122 {
2123 n %= MIN_PER_HOUR;
2124 }
2125 else
2126 {
2127 partBiggest = Part_Min;
2128 }
2129
2130 digits = 2;
2131 break;
2132
2133 case wxT('S'):
2134 n = GetSeconds().ToLong();
2135 if ( partBiggest < Part_Sec )
2136 {
2137 n %= SEC_PER_MIN;
2138 }
2139 else
2140 {
2141 partBiggest = Part_Sec;
2142 }
2143
2144 digits = 2;
2145 break;
2146 }
2147
2148 if ( digits )
2149 {
2150 fmtPrefix << wxT("0") << digits;
2151 }
2152
2153 str += wxString::Format(fmtPrefix + wxT("ld"), n);
2154 }
2155 else
2156 {
2157 // normal character, just copy
2158 str += ch;
2159 }
2160 }
2161
2162 return str;
2163}
2164
2165#endif // wxUSE_DATETIME
wxWidgets (Impactor)