-/////////////////////////////////////////////////////////////////////////////
-// Name: wx/datetime.h
+///////////////////////////////////////////////////////////////////////////////
+// Name: src/common/datetime.cpp
// Purpose: implementation of time/date related classes
+// (for formatting&parsing see datetimefmt.cpp)
// Author: Vadim Zeitlin
// Modified by:
// Created: 11.05.99
// RCS-ID: $Id$
-// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence: wxWindows license
-/////////////////////////////////////////////////////////////////////////////
+// Copyright: (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// parts of code taken from sndcal library by Scott E. Lee:
+//
+// Copyright 1993-1995, Scott E. Lee, all rights reserved.
+// Permission granted to use, copy, modify, distribute and sell
+// so long as the above copyright and this permission statement
+// are retained in all copies.
+//
+// Licence: wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+/*
+ * Implementation notes:
+ *
+ * 1. the time is stored as a 64bit integer containing the signed number of
+ * milliseconds since Jan 1. 1970 (the Unix Epoch) - so it is always
+ * expressed in GMT.
+ *
+ * 2. the range is thus something about 580 million years, but due to current
+ * algorithms limitations, only dates from Nov 24, 4714BC are handled
+ *
+ * 3. standard ANSI C functions are used to do time calculations whenever
+ * possible, i.e. when the date is in the range Jan 1, 1970 to 2038
+ *
+ * 4. otherwise, the calculations are done by converting the date to/from JDN
+ * first (the range limitation mentioned above comes from here: the
+ * algorithm used by Scott E. Lee's code only works for positive JDNs, more
+ * or less)
+ *
+ * 5. the object constructed for the given DD-MM-YYYY HH:MM:SS corresponds to
+ * this moment in local time and may be converted to the object
+ * corresponding to the same date/time in another time zone by using
+ * ToTimezone()
+ *
+ * 6. the conversions to the current (or any other) timezone are done when the
+ * internal time representation is converted to the broken-down one in
+ * wxDateTime::Tm.
+ */
// ============================================================================
// declarations
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation "datetime.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
+#if !defined(wxUSE_DATETIME) || wxUSE_DATETIME
+
#ifndef WX_PRECOMP
+ #ifdef __WXMSW__
+ #include "wx/msw/wrapwin.h"
+ #endif
#include "wx/string.h"
- #include "wx/intl.h"
#include "wx/log.h"
+ #include "wx/intl.h"
+ #include "wx/stopwatch.h" // for wxGetLocalTimeMillis()
+ #include "wx/module.h"
+ #include "wx/crt.h"
#endif // WX_PRECOMP
#include "wx/thread.h"
+#include "wx/tokenzr.h"
+
+#include <ctype.h>
-#define wxDEFINE_TIME_CONSTANTS
+#ifdef __WINDOWS__
+ #include <winnls.h>
+ #ifndef __WXWINCE__
+ #include <locale.h>
+ #endif
+#endif
#include "wx/datetime.h"
+// ----------------------------------------------------------------------------
+// wxXTI
+// ----------------------------------------------------------------------------
+
+#if wxUSE_EXTENDED_RTTI
+
+template<> void wxStringReadValue(const wxString &s , wxDateTime &data )
+{
+ data.ParseFormat(s,"%Y-%m-%d %H:%M:%S", NULL);
+}
+
+template<> void wxStringWriteValue(wxString &s , const wxDateTime &data )
+{
+ s = data.Format("%Y-%m-%d %H:%M:%S");
+}
+
+wxCUSTOM_TYPE_INFO(wxDateTime, wxToStringConverter<wxDateTime> , wxFromStringConverter<wxDateTime>)
+
+#endif // wxUSE_EXTENDED_RTTI
+
+
+// ----------------------------------------------------------------------------
+// conditional compilation
+// ----------------------------------------------------------------------------
+
+#if defined(__MWERKS__) && wxUSE_UNICODE
+ #include <wtime.h>
+#endif
+
+#if defined(__DJGPP__) || defined(__WINE__)
+ #include <sys/timeb.h>
+ #include <values.h>
+#endif
+
+#ifndef WX_GMTOFF_IN_TM
+ // Define it for some systems which don't (always) use configure but are
+ // known to have tm_gmtoff field.
+ #if defined(__WXPALMOS__) || defined(__DARWIN__)
+ #define WX_GMTOFF_IN_TM
+ #endif
+#endif
+
+// NB: VC8 safe time functions could/should be used for wxMSW as well probably
+#if defined(__WXWINCE__) && defined(__VISUALC8__)
+
+struct tm *wxLocaltime_r(const time_t *t, struct tm* tm)
+{
+ __time64_t t64 = *t;
+ return _localtime64_s(tm, &t64) == 0 ? tm : NULL;
+}
+
+struct tm *wxGmtime_r(const time_t* t, struct tm* tm)
+{
+ __time64_t t64 = *t;
+ return _gmtime64_s(tm, &t64) == 0 ? tm : NULL;
+}
+
+#else // !wxWinCE with VC8
+
+#if (!defined(HAVE_LOCALTIME_R) || !defined(HAVE_GMTIME_R)) && wxUSE_THREADS && !defined(__WINDOWS__)
+static wxMutex timeLock;
+#endif
+
+#ifndef HAVE_LOCALTIME_R
+struct tm *wxLocaltime_r(const time_t* ticks, struct tm* temp)
+{
+#if wxUSE_THREADS && !defined(__WINDOWS__)
+ // No need to waste time with a mutex on windows since it's using
+ // thread local storage for localtime anyway.
+ wxMutexLocker locker(timeLock);
+#endif
+
+ // Borland CRT crashes when passed 0 ticks for some reason, see SF bug 1704438
+#ifdef __BORLANDC__
+ if ( !*ticks )
+ return NULL;
+#endif
+
+ const tm * const t = localtime(ticks);
+ if ( !t )
+ return NULL;
+
+ memcpy(temp, t, sizeof(struct tm));
+ return temp;
+}
+#endif // !HAVE_LOCALTIME_R
+
+#ifndef HAVE_GMTIME_R
+struct tm *wxGmtime_r(const time_t* ticks, struct tm* temp)
+{
+#if wxUSE_THREADS && !defined(__WINDOWS__)
+ // No need to waste time with a mutex on windows since it's
+ // using thread local storage for gmtime anyway.
+ wxMutexLocker locker(timeLock);
+#endif
+
+#ifdef __BORLANDC__
+ if ( !*ticks )
+ return NULL;
+#endif
+
+ const tm * const t = gmtime(ticks);
+ if ( !t )
+ return NULL;
+
+ memcpy(temp, gmtime(ticks), sizeof(struct tm));
+ return temp;
+}
+#endif // !HAVE_GMTIME_R
+
+#endif // wxWinCE with VC8/other platforms
+
+// ----------------------------------------------------------------------------
+// macros
+// ----------------------------------------------------------------------------
+
+// debugging helper: just a convenient replacement of wxCHECK()
+#define wxDATETIME_CHECK(expr, msg) \
+ wxCHECK2_MSG(expr, *this = wxInvalidDateTime; return *this, msg)
+
+// ----------------------------------------------------------------------------
+// private classes
+// ----------------------------------------------------------------------------
+
+class wxDateTimeHolidaysModule : public wxModule
+{
+public:
+ virtual bool OnInit()
+ {
+ wxDateTimeHolidayAuthority::AddAuthority(new wxDateTimeWorkDays);
+
+ return true;
+ }
+
+ virtual void OnExit()
+ {
+ wxDateTimeHolidayAuthority::ClearAllAuthorities();
+ wxDateTimeHolidayAuthority::ms_authorities.clear();
+ }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxDateTimeHolidaysModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxDateTimeHolidaysModule, wxModule)
+
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
-// note that all these constants should be signed or we'd get some big
-// surprizes with C integer arithmetics
+// some trivial ones
static const int MONTHS_IN_YEAR = 12;
-static const int SECONDS_IN_MINUTE = 60;
+static const int SEC_PER_MIN = 60;
+
+static const int MIN_PER_HOUR = 60;
+
+static const long SECONDS_PER_DAY = 86400l;
+
+static const int DAYS_PER_WEEK = 7;
+
+static const long MILLISECONDS_PER_DAY = 86400000l;
-// the number of days in month in Julian/Gregorian calendar: the first line is
-// for normal years, the second one is for the leap ones
-static wxDateTime::wxDateTime_t gs_daysInMonth[2][MONTHS_IN_YEAR] =
+// this is the integral part of JDN of the midnight of Jan 1, 1970
+// (i.e. JDN(Jan 1, 1970) = 2440587.5)
+static const long EPOCH_JDN = 2440587l;
+
+// these values are only used in asserts so don't define them if asserts are
+// disabled to avoid warnings about unused static variables
+#if wxDEBUG_LEVEL
+// the date of JDN -0.5 (as we don't work with fractional parts, this is the
+// reference date for us) is Nov 24, 4714BC
+static const int JDN_0_YEAR = -4713;
+static const int JDN_0_MONTH = wxDateTime::Nov;
+static const int JDN_0_DAY = 24;
+#endif // wxDEBUG_LEVEL
+
+// the constants used for JDN calculations
+static const long JDN_OFFSET = 32046l;
+static const long DAYS_PER_5_MONTHS = 153l;
+static const long DAYS_PER_4_YEARS = 1461l;
+static const long DAYS_PER_400_YEARS = 146097l;
+
+// this array contains the cumulated number of days in all previous months for
+// normal and leap years
+static const wxDateTime::wxDateTime_t gs_cumulatedDays[2][MONTHS_IN_YEAR] =
{
- { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
- { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 },
+ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 }
};
+const long wxDateTime::TIME_T_FACTOR = 1000l;
+
// ----------------------------------------------------------------------------
-// globals
+// global data
// ----------------------------------------------------------------------------
-// a critical section is needed to protect GetTimeZone() static
-// variable in MT case
-#ifdef wxUSE_THREADS
- wxCriticalSection gs_critsectTimezone;
-#endif // wxUSE_THREADS
+const char wxDefaultDateTimeFormat[] = "%c";
+const char wxDefaultTimeSpanFormat[] = "%H:%M:%S";
+
+// in the fine tradition of ANSI C we use our equivalent of (time_t)-1 to
+// indicate an invalid wxDateTime object
+const wxDateTime wxDefaultDateTime;
+
+wxDateTime::Country wxDateTime::ms_country = wxDateTime::Country_Unknown;
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
+// debugger helper: this function can be called from a debugger to show what
+// the date really is
+extern const char *wxDumpDate(const wxDateTime* dt)
+{
+ static char buf[128];
+
+ wxString fmt(dt->Format("%Y-%m-%d (%a) %H:%M:%S"));
+ wxStrlcpy(buf,
+ (fmt + " (" + dt->GetValue().ToString() + " ticks)").ToAscii(),
+ WXSIZEOF(buf));
+
+ return buf;
+}
+
// get the number of days in the given month of the given year
static inline
wxDateTime::wxDateTime_t GetNumOfDaysInMonth(int year, wxDateTime::Month month)
{
- return gs_daysInMonth[wxDateTime::IsLeapYear(year)][month];
+ // the number of days in month in Julian/Gregorian calendar: the first line
+ // is for normal years, the second one is for the leap ones
+ static const wxDateTime::wxDateTime_t daysInMonth[2][MONTHS_IN_YEAR] =
+ {
+ { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
+ { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+ };
+
+ return daysInMonth[wxDateTime::IsLeapYear(year)][month];
}
-// ensure that the timezone variable is set by calling localtime
-static int GetTimeZone()
+// returns the time zone in the C sense, i.e. the difference UTC - local
+// (in seconds)
+// NOTE: not static because used by datetimefmt.cpp
+int GetTimeZone()
{
- // set to TRUE when the timezone is set
- static bool s_timezoneSet = FALSE;
-
- wxCRIT_SECT_LOCKER(lock, gs_critsectTimezone);
+#ifdef WX_GMTOFF_IN_TM
+ // set to true when the timezone is set
+ static bool s_timezoneSet = false;
+ static long gmtoffset = LONG_MAX; // invalid timezone
+ // ensure that the timezone variable is set by calling wxLocaltime_r
if ( !s_timezoneSet )
{
- (void)localtime(0);
+ // just call wxLocaltime_r() instead of figuring out whether this
+ // system supports tzset(), _tzset() or something else
+ time_t t = 0;
+ struct tm tm;
- s_timezoneSet = TRUE;
+ wxLocaltime_r(&t, &tm);
+ s_timezoneSet = true;
+
+ // note that GMT offset is the opposite of time zone and so to return
+ // consistent results in both WX_GMTOFF_IN_TM and !WX_GMTOFF_IN_TM
+ // cases we have to negate it
+ gmtoffset = -tm.tm_gmtoff;
+ }
+ return (int)gmtoffset;
+#elif defined(__DJGPP__) || defined(__WINE__)
+ struct timeb tb;
+ ftime(&tb);
+ return tb.timezone*60;
+#elif defined(__VISUALC__)
+ // We must initialize the time zone information before using it (this will
+ // be done only once internally).
+ _tzset();
+
+ // Starting with VC++ 8 timezone variable is deprecated and is not even
+ // available in some standard library version so use the new function for
+ // accessing it instead.
+ #if wxCHECK_VISUALC_VERSION(8)
+ long t;
+ _get_timezone(&t);
+ return t;
+ #else // VC++ < 8
+ return timezone;
+ #endif
+#elif defined(WX_TIMEZONE) // If WX_TIMEZONE was defined by configure, use it.
+ return WX_TIMEZONE;
+#elif defined(__BORLANDC__) || defined(__MINGW32__) || defined(__VISAGECPP__)
+ return _timezone;
+#elif defined(__MWERKS__)
+ return 28800;
+#else // unknown platform -- assume it has timezone
+ return timezone;
+#endif // WX_GMTOFF_IN_TM/!WX_GMTOFF_IN_TM
+}
+
+// return the integral part of the JDN for the midnight of the given date (to
+// get the real JDN you need to add 0.5, this is, in fact, JDN of the
+// noon of the previous day)
+static long GetTruncatedJDN(wxDateTime::wxDateTime_t day,
+ wxDateTime::Month mon,
+ int year)
+{
+ // CREDIT: code below is by Scott E. Lee (but bugs are mine)
+
+ // check the date validity
+ wxASSERT_MSG(
+ (year > JDN_0_YEAR) ||
+ ((year == JDN_0_YEAR) && (mon > JDN_0_MONTH)) ||
+ ((year == JDN_0_YEAR) && (mon == JDN_0_MONTH) && (day >= JDN_0_DAY)),
+ wxT("date out of range - can't convert to JDN")
+ );
+
+ // make the year positive to avoid problems with negative numbers division
+ year += 4800;
+
+ // months are counted from March here
+ int month;
+ if ( mon >= wxDateTime::Mar )
+ {
+ month = mon - 2;
+ }
+ else
+ {
+ month = mon + 10;
+ year--;
}
- return (int)timezone;
+ // now we can simply add all the contributions together
+ return ((year / 100) * DAYS_PER_400_YEARS) / 4
+ + ((year % 100) * DAYS_PER_4_YEARS) / 4
+ + (month * DAYS_PER_5_MONTHS + 2) / 5
+ + day
+ - JDN_OFFSET;
}
-// this function is a wrapper around strftime(3)
-static wxString CallStrftime(const wxChar *format, const tm* tm)
+#ifdef wxHAS_STRFTIME
+
+// this function is a wrapper around strftime(3) adding error checking
+// NOTE: not static because used by datetimefmt.cpp
+wxString CallStrftime(const wxString& format, const tm* tm)
{
- wxChar buf[1024];
+ wxChar buf[4096];
+ // Create temp wxString here to work around mingw/cygwin bug 1046059
+ // http://sourceforge.net/tracker/?func=detail&atid=102435&aid=1046059&group_id=2435
+ wxString s;
+
if ( !wxStrftime(buf, WXSIZEOF(buf), format, tm) )
{
- // is ti really possible that 1024 is too short?
- wxFAIL_MSG(_T("strftime() failed"));
+ // if the format is valid, buffer must be too small?
+ wxFAIL_MSG(wxT("strftime() failed"));
+
+ buf[0] = '\0';
}
- return wxString(buf);
+ s = buf;
+ return s;
}
+#endif // wxHAS_STRFTIME
+
// if year and/or month have invalid values, replace them with the current ones
static void ReplaceDefaultYearMonthWithCurrent(int *year,
wxDateTime::Month *month)
{
struct tm *tmNow = NULL;
+ struct tm tmstruct;
if ( *year == wxDateTime::Inv_Year )
{
- tmNow = wxDateTime::GetTmNow();
+ tmNow = wxDateTime::GetTmNow(&tmstruct);
*year = 1900 + tmNow->tm_year;
}
if ( *month == wxDateTime::Inv_Month )
{
if ( !tmNow )
- tmNow = wxDateTime::GetTmNow();
+ tmNow = wxDateTime::GetTmNow(&tmstruct);
*month = (wxDateTime::Month)tmNow->tm_mon;
}
}
+// fill the struct tm with default values
+// NOTE: not static because used by datetimefmt.cpp
+void InitTm(struct tm& tm)
+{
+ // struct tm may have etxra fields (undocumented and with unportable
+ // names) which, nevertheless, must be set to 0
+ memset(&tm, 0, sizeof(struct tm));
+
+ tm.tm_mday = 1; // mday 0 is invalid
+ tm.tm_year = 76; // any valid year
+ tm.tm_isdst = -1; // auto determine
+}
+
// ============================================================================
// implementation of wxDateTime
// ============================================================================
-// ----------------------------------------------------------------------------
-// static data
-// ----------------------------------------------------------------------------
-
-wxDateTime::Country wxDateTime::ms_country = wxDateTime::Country_Unknown;
-wxDateTime wxDateTime::ms_InvDateTime;
-
// ----------------------------------------------------------------------------
// struct Tm
// ----------------------------------------------------------------------------
{
year = (wxDateTime_t)wxDateTime::Inv_Year;
mon = wxDateTime::Inv_Month;
- mday = 0;
- hour = min = sec = 0;
+ mday =
+ yday = 0;
+ hour =
+ min =
+ sec =
+ msec = 0;
wday = wxDateTime::Inv_WeekDay;
}
-wxDateTime::Tm::Tm(const struct tm& tm)
+wxDateTime::Tm::Tm(const struct tm& tm, const TimeZone& tz)
+ : m_tz(tz)
{
- sec = tm.tm_sec;
- min = tm.tm_min;
- hour = tm.tm_hour;
- mday = tm.tm_mday;
+ msec = 0;
+ sec = (wxDateTime::wxDateTime_t)tm.tm_sec;
+ min = (wxDateTime::wxDateTime_t)tm.tm_min;
+ hour = (wxDateTime::wxDateTime_t)tm.tm_hour;
+ mday = (wxDateTime::wxDateTime_t)tm.tm_mday;
mon = (wxDateTime::Month)tm.tm_mon;
year = 1900 + tm.tm_year;
- wday = tm.tm_wday;
- yday = tm.tm_yday;
+ wday = (wxDateTime::wxDateTime_t)tm.tm_wday;
+ yday = (wxDateTime::wxDateTime_t)tm.tm_yday;
}
bool wxDateTime::Tm::IsValid() const
{
+ if ( mon == wxDateTime::Inv_Month )
+ return false;
+
+ // We need to check this here to avoid crashing in GetNumOfDaysInMonth() if
+ // somebody passed us "(wxDateTime::Month)1000".
+ wxCHECK_MSG( mon >= wxDateTime::Jan && mon < wxDateTime::Inv_Month, false,
+ wxS("Invalid month value") );
+
// we allow for the leap seconds, although we don't use them (yet)
return (year != wxDateTime::Inv_Year) && (mon != wxDateTime::Inv_Month) &&
- (mday < GetNumOfDaysInMonth(year, mon)) &&
- (hour < 24) && (min < 60) && (sec < 62);
+ (mday > 0 && mday <= GetNumOfDaysInMonth(year, mon)) &&
+ (hour < 24) && (min < 60) && (sec < 62) && (msec < 1000);
}
void wxDateTime::Tm::ComputeWeekDay()
{
- wxFAIL_MSG(_T("TODO"));
+ // compute the week day from day/month/year: we use the dumbest algorithm
+ // possible: just compute our JDN and then use the (simple to derive)
+ // formula: weekday = (JDN + 1.5) % 7
+ wday = (wxDateTime::wxDateTime_t)((GetTruncatedJDN(mday, mon, year) + 2) % 7);
}
-void wxDateTime::Tm::AddMonths(wxDateTime::wxDateTime_t monDiff)
+void wxDateTime::Tm::AddMonths(int monDiff)
{
// normalize the months field
while ( monDiff < -mon )
monDiff += MONTHS_IN_YEAR;
}
- while ( monDiff + mon > MONTHS_IN_YEAR )
+ while ( monDiff + mon >= MONTHS_IN_YEAR )
{
year++;
+
+ monDiff -= MONTHS_IN_YEAR;
}
mon = (wxDateTime::Month)(mon + monDiff);
- wxASSERT_MSG( mon >= 0 && mon < 12, _T("logic error") );
+ wxASSERT_MSG( mon >= 0 && mon < MONTHS_IN_YEAR, wxT("logic error") );
+
+ // NB: we don't check here that the resulting date is valid, this function
+ // is private and the caller must check it if needed
}
-void wxDateTime::Tm::AddDays(wxDateTime::wxDateTime_t dayDiff)
+void wxDateTime::Tm::AddDays(int dayDiff)
{
// normalize the days field
- mday += dayDiff;
- while ( mday < 1 )
+ while ( dayDiff + mday < 1 )
{
AddMonths(-1);
- mday += GetNumOfDaysInMonth(year, mon);
+ dayDiff += GetNumOfDaysInMonth(year, mon);
}
+ mday = (wxDateTime::wxDateTime_t)( mday + dayDiff );
while ( mday > GetNumOfDaysInMonth(year, mon) )
{
mday -= GetNumOfDaysInMonth(year, mon);
}
wxASSERT_MSG( mday > 0 && mday <= GetNumOfDaysInMonth(year, mon),
- _T("logic error") );
+ wxT("logic error") );
}
// ----------------------------------------------------------------------------
switch ( tz )
{
case wxDateTime::Local:
- // leave offset to be 0
+ // get the offset from C RTL: it returns the difference GMT-local
+ // while we want to have the offset _from_ GMT, hence the '-'
+ m_offset = -GetTimeZone();
break;
case wxDateTime::GMT_12:
case wxDateTime::GMT_3:
case wxDateTime::GMT_2:
case wxDateTime::GMT_1:
- m_offset = -60*(wxDateTime::GMT0 - tz);
+ m_offset = -3600*(wxDateTime::GMT0 - tz);
break;
case wxDateTime::GMT0:
case wxDateTime::GMT10:
case wxDateTime::GMT11:
case wxDateTime::GMT12:
- m_offset = 60*(tz - wxDateTime::GMT0);
+ case wxDateTime::GMT13:
+ m_offset = 3600*(tz - wxDateTime::GMT0);
break;
case wxDateTime::A_CST:
// Central Standard Time in use in Australia = UTC + 9.5
- m_offset = 9*60 + 30;
+ m_offset = 60l*(9*MIN_PER_HOUR + MIN_PER_HOUR/2);
break;
default:
- wxFAIL_MSG( _T("unknown time zone") );
+ wxFAIL_MSG( wxT("unknown time zone") );
}
}
// static functions
// ----------------------------------------------------------------------------
+/* static */
+struct tm *wxDateTime::GetTmNow(struct tm *tmstruct)
+{
+ time_t t = GetTimeNow();
+ return wxLocaltime_r(&t, tmstruct);
+}
+
/* static */
bool wxDateTime::IsLeapYear(int year, wxDateTime::Calendar cal)
{
}
else
{
- wxFAIL_MSG(_T("unknown calendar"));
+ wxFAIL_MSG(wxT("unknown calendar"));
- return FALSE;
+ return false;
}
}
return year > 0 ? year / 100 : year / 100 - 1;
}
-/* static */
-void wxDateTime::SetCountry(wxDateTime::Country country)
-{
- ms_country = country;
-}
-
/* static */
int wxDateTime::ConvertYearToBC(int year)
{
return Now().GetYear();
case Julian:
- wxFAIL_MSG(_T("TODO"));
+ wxFAIL_MSG(wxT("TODO"));
break;
default:
- wxFAIL_MSG(_T("unsupported calendar"));
+ wxFAIL_MSG(wxT("unsupported calendar"));
break;
}
{
case Gregorian:
return Now().GetMonth();
- break;
case Julian:
- wxFAIL_MSG(_T("TODO"));
+ wxFAIL_MSG(wxT("TODO"));
break;
default:
- wxFAIL_MSG(_T("unsupported calendar"));
+ wxFAIL_MSG(wxT("unsupported calendar"));
break;
}
case Gregorian:
case Julian:
return IsLeapYear(year) ? 366 : 365;
- break;
default:
- wxFAIL_MSG(_T("unsupported calendar"));
+ wxFAIL_MSG(wxT("unsupported calendar"));
break;
}
int year,
wxDateTime::Calendar cal)
{
- wxCHECK_MSG( month < MONTHS_IN_YEAR, 0, _T("invalid month") );
+ wxCHECK_MSG( month < MONTHS_IN_YEAR, 0, wxT("invalid month") );
if ( cal == Gregorian || cal == Julian )
{
}
else
{
- wxFAIL_MSG(_T("unsupported calendar"));
+ wxFAIL_MSG(wxT("unsupported calendar"));
return 0;
}
}
-/* static */
-wxString wxDateTime::GetMonthName(wxDateTime::Month month, bool abbr)
+namespace
{
- wxCHECK_MSG( month != Inv_Month, _T(""), _T("invalid month") );
- tm tm = { 0, 0, 0, 1, month, 76 }; // any year will do
-
- return CallStrftime(abbr ? _T("%b") : _T("%B"), &tm);
-}
-
-/* static */
-wxString wxDateTime::GetWeekDayName(wxDateTime::WeekDay wday, bool abbr)
+// helper function used by GetEnglish/WeekDayName(): returns 0 if flags is
+// Name_Full and 1 if it is Name_Abbr or -1 if the flags is incorrect (and
+// asserts in this case)
+//
+// the return value of this function is used as an index into 2D array
+// containing full names in its first row and abbreviated ones in the 2nd one
+int NameArrayIndexFromFlag(wxDateTime::NameFlags flags)
{
- wxCHECK_MSG( wday != Inv_WeekDay, _T(""), _T("invalid weekday") );
+ switch ( flags )
+ {
+ case wxDateTime::Name_Full:
+ return 0;
- // take some arbitrary Sunday
- tm tm = { 0, 0, 0, 28, Nov, 99 };
+ case wxDateTime::Name_Abbr:
+ return 1;
- // and offset it by the number of days needed to get
- tm.tm_mday += wday;
+ default:
+ wxFAIL_MSG( "unknown wxDateTime::NameFlags value" );
+ }
- return CallStrftime(abbr ? _T("%a") : _T("%A"), &tm);
+ return -1;
}
-// ----------------------------------------------------------------------------
-// constructors and assignment operators
-// ----------------------------------------------------------------------------
+} // anonymous namespace
-wxDateTime& wxDateTime::Set(const struct tm& tm1)
+/* static */
+wxString wxDateTime::GetEnglishMonthName(Month month, NameFlags flags)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
+ wxCHECK_MSG( month != Inv_Month, wxEmptyString, "invalid month" );
- tm tm2(tm1);
- time_t timet = mktime(&tm2);
- if ( timet == (time_t)(-1) )
+ static const char *const monthNames[2][MONTHS_IN_YEAR] =
{
- wxFAIL_MSG(_T("Invalid time"));
+ { "January", "February", "March", "April", "May", "June",
+ "July", "August", "September", "October", "November", "December" },
+ { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }
+ };
- return ms_InvDateTime;
- }
- else
- {
- return Set(timet);
- }
+ const int idx = NameArrayIndexFromFlag(flags);
+ if ( idx == -1 )
+ return wxString();
+
+ return monthNames[idx][month];
}
-wxDateTime& wxDateTime::Set(wxDateTime_t hour,
- wxDateTime_t minute,
- wxDateTime_t second,
- wxDateTime_t millisec)
+/* static */
+wxString wxDateTime::GetMonthName(wxDateTime::Month month,
+ wxDateTime::NameFlags flags)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- // we allow seconds to be 61 to account for the leap seconds, even if we
- // don't use them really
- wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
- ms_InvDateTime,
- _T("Invalid time in wxDateTime::Set()") );
+#ifdef wxHAS_STRFTIME
+ wxCHECK_MSG( month != Inv_Month, wxEmptyString, wxT("invalid month") );
+
+ // notice that we must set all the fields to avoid confusing libc (GNU one
+ // gets confused to a crash if we don't do this)
+ tm tm;
+ InitTm(tm);
+ tm.tm_mon = month;
+
+ return CallStrftime(flags == Name_Abbr ? wxT("%b") : wxT("%B"), &tm);
+#else // !wxHAS_STRFTIME
+ return GetEnglishMonthName(month, flags);
+#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
+}
- // get the current date from system
- time_t timet = GetTimeNow();
- struct tm *tm = localtime(&timet);
+/* static */
+wxString wxDateTime::GetEnglishWeekDayName(WeekDay wday, NameFlags flags)
+{
+ wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, wxT("invalid weekday") );
- // adjust the time
- tm->tm_hour = hour;
- tm->tm_min = minute;
- tm->tm_sec = second;
+ static const char *const weekdayNames[2][DAYS_PER_WEEK] =
+ {
+ { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
+ "Saturday" },
+ { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" },
+ };
- (void)Set(*tm);
+ const int idx = NameArrayIndexFromFlag(flags);
+ if ( idx == -1 )
+ return wxString();
- // and finally adjust milliseconds
- return SetMillisecond(millisec);
+ return weekdayNames[idx][wday];
}
-wxDateTime& wxDateTime::Set(wxDateTime_t day,
- Month month,
- int year,
- wxDateTime_t hour,
- wxDateTime_t minute,
- wxDateTime_t second,
- wxDateTime_t millisec)
+/* static */
+wxString wxDateTime::GetWeekDayName(wxDateTime::WeekDay wday,
+ wxDateTime::NameFlags flags)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
- ms_InvDateTime,
- _T("Invalid time in wxDateTime::Set()") );
-
- ReplaceDefaultYearMonthWithCurrent(&year, &month);
+#ifdef wxHAS_STRFTIME
+ wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, wxT("invalid weekday") );
+
+ // take some arbitrary Sunday (but notice that the day should be such that
+ // after adding wday to it below we still have a valid date, e.g. don't
+ // take 28 here!)
+ tm tm;
+ InitTm(tm);
+ tm.tm_mday = 21;
+ tm.tm_mon = Nov;
+ tm.tm_year = 99;
+
+ // and offset it by the number of days needed to get the correct wday
+ tm.tm_mday += wday;
- wxCHECK_MSG( day <= GetNumberOfDays(month, year), ms_InvDateTime,
- _T("Invalid date in wxDateTime::Set()") );
+ // call mktime() to normalize it...
+ (void)mktime(&tm);
- // the range of time_t type (inclusive)
- static const int yearMinInRange = 1970;
- static const int yearMaxInRange = 2037;
+ // ... and call strftime()
+ return CallStrftime(flags == Name_Abbr ? wxT("%a") : wxT("%A"), &tm);
+#else // !wxHAS_STRFTIME
+ return GetEnglishWeekDayName(wday, flags);
+#endif // wxHAS_STRFTIME/!wxHAS_STRFTIME
+}
- // test only the year instead of testing for the exact end of the Unix
- // time_t range - it doesn't bring anything to do more precise checks
- if ( year >= yearMinInRange && year <= yearMaxInRange )
+/* static */
+void wxDateTime::GetAmPmStrings(wxString *am, wxString *pm)
+{
+ tm tm;
+ InitTm(tm);
+ wxChar buffer[64];
+ // @Note: Do not call 'CallStrftime' here! CallStrftime checks the return code
+ // and causes an assertion failed if the buffer is to small (which is good) - OR -
+ // if strftime does not return anything because the format string is invalid - OR -
+ // if there are no 'am' / 'pm' tokens defined for the current locale (which is not good).
+ // wxDateTime::ParseTime will try several different formats to parse the time.
+ // As a result, GetAmPmStrings might get called, even if the current locale
+ // does not define any 'am' / 'pm' tokens. In this case, wxStrftime would
+ // assert, even though it is a perfectly legal use.
+ if ( am )
{
- // use the standard library version if the date is in range - this is
- // probably more efficient than our code
- struct tm tm;
- tm.tm_year = year - 1900;
- tm.tm_mon = month;
- tm.tm_mday = day;
- tm.tm_hour = hour;
- tm.tm_min = minute;
- tm.tm_sec = second;
-
- (void)Set(tm);
-
- // and finally adjust milliseconds
- return SetMillisecond(millisec);
+ if (wxStrftime(buffer, WXSIZEOF(buffer), wxT("%p"), &tm) > 0)
+ *am = wxString(buffer);
+ else
+ *am = wxString();
}
- else
+ if ( pm )
{
- // do time calculations ourselves: we want to calculate the number of
- // milliseconds between the given date and the epoch
- wxFAIL_MSG(_T("TODO"));
+ tm.tm_hour = 13;
+ if (wxStrftime(buffer, WXSIZEOF(buffer), wxT("%p"), &tm) > 0)
+ *pm = wxString(buffer);
+ else
+ *pm = wxString();
}
-
- return *this;
}
+
// ----------------------------------------------------------------------------
-// time_t <-> broken down time conversions
+// Country stuff: date calculations depend on the country (DST, work days,
+// ...), so we need to know which rules to follow.
// ----------------------------------------------------------------------------
-wxDateTime::Tm wxDateTime::GetTm() const
+/* static */
+wxDateTime::Country wxDateTime::GetCountry()
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- time_t time = GetTicks();
- if ( time != (time_t)-1 )
+ // TODO use LOCALE_ICOUNTRY setting under Win32
+#ifndef __WXWINCE__
+ if ( ms_country == Country_Unknown )
{
- // use C RTL functions
- tm *tm = localtime(&time);
-
- // should never happen
- wxCHECK_MSG( tm, Tm(), _T("localtime() failed") );
+ // try to guess from the time zone name
+ time_t t = time(NULL);
+ struct tm tmstruct;
+ struct tm *tm = wxLocaltime_r(&t, &tmstruct);
- return Tm(*tm);
+ wxString tz = CallStrftime(wxT("%Z"), tm);
+ if ( tz == wxT("WET") || tz == wxT("WEST") )
+ {
+ ms_country = UK;
+ }
+ else if ( tz == wxT("CET") || tz == wxT("CEST") )
+ {
+ ms_country = Country_EEC;
+ }
+ else if ( tz == wxT("MSK") || tz == wxT("MSD") )
+ {
+ ms_country = Russia;
+ }
+ else if ( tz == wxT("AST") || tz == wxT("ADT") ||
+ tz == wxT("EST") || tz == wxT("EDT") ||
+ tz == wxT("CST") || tz == wxT("CDT") ||
+ tz == wxT("MST") || tz == wxT("MDT") ||
+ tz == wxT("PST") || tz == wxT("PDT") )
+ {
+ ms_country = USA;
+ }
+ else
+ {
+ // well, choose a default one
+ ms_country = USA;
+ }
}
- else
- {
- wxFAIL_MSG(_T("TODO"));
+#else // __WXWINCE__
+ ms_country = USA;
+#endif // !__WXWINCE__/__WXWINCE__
- return Tm();
- }
+ return ms_country;
}
-wxDateTime& wxDateTime::SetYear(int year)
+/* static */
+void wxDateTime::SetCountry(wxDateTime::Country country)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- Tm tm(GetTm());
- tm.year = year;
- Set(tm);
-
- return *this;
+ ms_country = country;
}
-wxDateTime& wxDateTime::SetMonth(Month month)
+/* static */
+bool wxDateTime::IsWestEuropeanCountry(Country country)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- Tm tm(GetTm());
- tm.mon = month;
- Set(tm);
+ if ( country == Country_Default )
+ {
+ country = GetCountry();
+ }
- return *this;
+ return (Country_WesternEurope_Start <= country) &&
+ (country <= Country_WesternEurope_End);
}
-wxDateTime& wxDateTime::SetDay(wxDateTime_t mday)
-{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
+// ----------------------------------------------------------------------------
+// DST calculations: we use 3 different rules for the West European countries,
+// USA and for the rest of the world. This is undoubtedly false for many
+// countries, but I lack the necessary info (and the time to gather it),
+// please add the other rules here!
+// ----------------------------------------------------------------------------
- Tm tm(GetTm());
- tm.mday = mday;
+/* static */
+bool wxDateTime::IsDSTApplicable(int year, Country country)
+{
+ if ( year == Inv_Year )
+ {
+ // take the current year if none given
+ year = GetCurrentYear();
+ }
+
+ if ( country == Country_Default )
+ {
+ country = GetCountry();
+ }
+
+ switch ( country )
+ {
+ case USA:
+ case UK:
+ // DST was first observed in the US and UK during WWI, reused
+ // during WWII and used again since 1966
+ return year >= 1966 ||
+ (year >= 1942 && year <= 1945) ||
+ (year == 1918 || year == 1919);
+
+ default:
+ // assume that it started after WWII
+ return year > 1950;
+ }
+}
+
+/* static */
+wxDateTime wxDateTime::GetBeginDST(int year, Country country)
+{
+ if ( year == Inv_Year )
+ {
+ // take the current year if none given
+ year = GetCurrentYear();
+ }
+
+ if ( country == Country_Default )
+ {
+ country = GetCountry();
+ }
+
+ if ( !IsDSTApplicable(year, country) )
+ {
+ return wxInvalidDateTime;
+ }
+
+ wxDateTime dt;
+
+ if ( IsWestEuropeanCountry(country) || (country == Russia) )
+ {
+ // DST begins at 1 a.m. GMT on the last Sunday of March
+ if ( !dt.SetToLastWeekDay(Sun, Mar, year) )
+ {
+ // weird...
+ wxFAIL_MSG( wxT("no last Sunday in March?") );
+ }
+
+ dt += wxTimeSpan::Hours(1);
+ }
+ else switch ( country )
+ {
+ case USA:
+ switch ( year )
+ {
+ case 1918:
+ case 1919:
+ // don't know for sure - assume it was in effect all year
+
+ case 1943:
+ case 1944:
+ case 1945:
+ dt.Set(1, Jan, year);
+ break;
+
+ case 1942:
+ // DST was installed Feb 2, 1942 by the Congress
+ dt.Set(2, Feb, year);
+ break;
+
+ // Oil embargo changed the DST period in the US
+ case 1974:
+ dt.Set(6, Jan, 1974);
+ break;
+
+ case 1975:
+ dt.Set(23, Feb, 1975);
+ break;
+
+ default:
+ // before 1986, DST begun on the last Sunday of April, but
+ // in 1986 Reagan changed it to begin at 2 a.m. of the
+ // first Sunday in April
+ if ( year < 1986 )
+ {
+ if ( !dt.SetToLastWeekDay(Sun, Apr, year) )
+ {
+ // weird...
+ wxFAIL_MSG( wxT("no first Sunday in April?") );
+ }
+ }
+ else if ( year > 2006 )
+ // Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).
+ // Starting in 2007, daylight time begins in the United States on the
+ // second Sunday in March and ends on the first Sunday in November
+ {
+ if ( !dt.SetToWeekDay(Sun, 2, Mar, year) )
+ {
+ // weird...
+ wxFAIL_MSG( wxT("no second Sunday in March?") );
+ }
+ }
+ else
+ {
+ if ( !dt.SetToWeekDay(Sun, 1, Apr, year) )
+ {
+ // weird...
+ wxFAIL_MSG( wxT("no first Sunday in April?") );
+ }
+ }
+
+ dt += wxTimeSpan::Hours(2);
+
+ // TODO what about timezone??
+ }
+
+ break;
+
+ default:
+ // assume Mar 30 as the start of the DST for the rest of the world
+ // - totally bogus, of course
+ dt.Set(30, Mar, year);
+ }
+
+ return dt;
+}
+
+/* static */
+wxDateTime wxDateTime::GetEndDST(int year, Country country)
+{
+ if ( year == Inv_Year )
+ {
+ // take the current year if none given
+ year = GetCurrentYear();
+ }
+
+ if ( country == Country_Default )
+ {
+ country = GetCountry();
+ }
+
+ if ( !IsDSTApplicable(year, country) )
+ {
+ return wxInvalidDateTime;
+ }
+
+ wxDateTime dt;
+
+ if ( IsWestEuropeanCountry(country) || (country == Russia) )
+ {
+ // DST ends at 1 a.m. GMT on the last Sunday of October
+ if ( !dt.SetToLastWeekDay(Sun, Oct, year) )
+ {
+ // weirder and weirder...
+ wxFAIL_MSG( wxT("no last Sunday in October?") );
+ }
+
+ dt += wxTimeSpan::Hours(1);
+ }
+ else switch ( country )
+ {
+ case USA:
+ switch ( year )
+ {
+ case 1918:
+ case 1919:
+ // don't know for sure - assume it was in effect all year
+
+ case 1943:
+ case 1944:
+ dt.Set(31, Dec, year);
+ break;
+
+ case 1945:
+ // the time was reset after the end of the WWII
+ dt.Set(30, Sep, year);
+ break;
+
+ default: // default for switch (year)
+ if ( year > 2006 )
+ // Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).
+ // Starting in 2007, daylight time begins in the United States on the
+ // second Sunday in March and ends on the first Sunday in November
+ {
+ if ( !dt.SetToWeekDay(Sun, 1, Nov, year) )
+ {
+ // weird...
+ wxFAIL_MSG( wxT("no first Sunday in November?") );
+ }
+ }
+ else
+ // pre-2007
+ // DST ends at 2 a.m. on the last Sunday of October
+ {
+ if ( !dt.SetToLastWeekDay(Sun, Oct, year) )
+ {
+ // weirder and weirder...
+ wxFAIL_MSG( wxT("no last Sunday in October?") );
+ }
+ }
+
+ dt += wxTimeSpan::Hours(2);
+
+ // TODO: what about timezone??
+ }
+ break;
+
+ default: // default for switch (country)
+ // assume October 26th as the end of the DST - totally bogus too
+ dt.Set(26, Oct, year);
+ }
+
+ return dt;
+}
+
+// ----------------------------------------------------------------------------
+// constructors and assignment operators
+// ----------------------------------------------------------------------------
+
+// return the current time with ms precision
+/* static */ wxDateTime wxDateTime::UNow()
+{
+ return wxDateTime(wxGetLocalTimeMillis());
+}
+
+// the values in the tm structure contain the local time
+wxDateTime& wxDateTime::Set(const struct tm& tm)
+{
+ struct tm tm2(tm);
+ time_t timet = mktime(&tm2);
+
+ if ( timet == (time_t)-1 )
+ {
+ // mktime() rather unintuitively fails for Jan 1, 1970 if the hour is
+ // less than timezone - try to make it work for this case
+ if ( tm2.tm_year == 70 && tm2.tm_mon == 0 && tm2.tm_mday == 1 )
+ {
+ return Set((time_t)(
+ GetTimeZone() +
+ tm2.tm_hour * MIN_PER_HOUR * SEC_PER_MIN +
+ tm2.tm_min * SEC_PER_MIN +
+ tm2.tm_sec));
+ }
+
+ wxFAIL_MSG( wxT("mktime() failed") );
+
+ *this = wxInvalidDateTime;
+
+ return *this;
+ }
+ else
+ {
+ return Set(timet);
+ }
+}
+
+wxDateTime& wxDateTime::Set(wxDateTime_t hour,
+ wxDateTime_t minute,
+ wxDateTime_t second,
+ wxDateTime_t millisec)
+{
+ // we allow seconds to be 61 to account for the leap seconds, even if we
+ // don't use them really
+ wxDATETIME_CHECK( hour < 24 &&
+ second < 62 &&
+ minute < 60 &&
+ millisec < 1000,
+ wxT("Invalid time in wxDateTime::Set()") );
+
+ // get the current date from system
+ struct tm tmstruct;
+ struct tm *tm = GetTmNow(&tmstruct);
+
+ wxDATETIME_CHECK( tm, wxT("wxLocaltime_r() failed") );
+
+ // make a copy so it isn't clobbered by the call to mktime() below
+ struct tm tm1(*tm);
+
+ // adjust the time
+ tm1.tm_hour = hour;
+ tm1.tm_min = minute;
+ tm1.tm_sec = second;
+
+ // and the DST in case it changes on this date
+ struct tm tm2(tm1);
+ mktime(&tm2);
+ if ( tm2.tm_isdst != tm1.tm_isdst )
+ tm1.tm_isdst = tm2.tm_isdst;
+
+ (void)Set(tm1);
+
+ // and finally adjust milliseconds
+ return SetMillisecond(millisec);
+}
+
+wxDateTime& wxDateTime::Set(wxDateTime_t day,
+ Month month,
+ int year,
+ wxDateTime_t hour,
+ wxDateTime_t minute,
+ wxDateTime_t second,
+ wxDateTime_t millisec)
+{
+ wxDATETIME_CHECK( hour < 24 &&
+ second < 62 &&
+ minute < 60 &&
+ millisec < 1000,
+ wxT("Invalid time in wxDateTime::Set()") );
+
+ ReplaceDefaultYearMonthWithCurrent(&year, &month);
+
+ wxDATETIME_CHECK( (0 < day) && (day <= GetNumberOfDays(month, year)),
+ wxT("Invalid date in wxDateTime::Set()") );
+
+ // the range of time_t type (inclusive)
+ static const int yearMinInRange = 1970;
+ static const int yearMaxInRange = 2037;
+
+ // test only the year instead of testing for the exact end of the Unix
+ // time_t range - it doesn't bring anything to do more precise checks
+ if ( year >= yearMinInRange && year <= yearMaxInRange )
+ {
+ // use the standard library version if the date is in range - this is
+ // probably more efficient than our code
+ struct tm tm;
+ tm.tm_year = year - 1900;
+ tm.tm_mon = month;
+ tm.tm_mday = day;
+ tm.tm_hour = hour;
+ tm.tm_min = minute;
+ tm.tm_sec = second;
+ tm.tm_isdst = -1; // mktime() will guess it
+
+ (void)Set(tm);
+
+ // and finally adjust milliseconds
+ if (IsValid())
+ SetMillisecond(millisec);
+
+ return *this;
+ }
+ else
+ {
+ // do time calculations ourselves: we want to calculate the number of
+ // milliseconds between the given date and the epoch
+
+ // get the JDN for the midnight of this day
+ m_time = GetTruncatedJDN(day, month, year);
+ m_time -= EPOCH_JDN;
+ m_time *= SECONDS_PER_DAY * TIME_T_FACTOR;
+
+ // JDN corresponds to GMT, we take localtime
+ Add(wxTimeSpan(hour, minute, second + GetTimeZone(), millisec));
+ }
+
+ return *this;
+}
+
+wxDateTime& wxDateTime::Set(double jdn)
+{
+ // so that m_time will be 0 for the midnight of Jan 1, 1970 which is jdn
+ // EPOCH_JDN + 0.5
+ jdn -= EPOCH_JDN + 0.5;
+
+ m_time.Assign(jdn*MILLISECONDS_PER_DAY);
+
+ // JDNs always are in UTC, so we don't need any adjustments for time zone
+
+ return *this;
+}
+
+wxDateTime& wxDateTime::ResetTime()
+{
+ Tm tm = GetTm();
+
+ if ( tm.hour || tm.min || tm.sec || tm.msec )
+ {
+ tm.msec =
+ tm.sec =
+ tm.min =
+ tm.hour = 0;
+
+ Set(tm);
+ }
+
+ return *this;
+}
+
+wxDateTime wxDateTime::GetDateOnly() const
+{
+ Tm tm = GetTm();
+ tm.msec =
+ tm.sec =
+ tm.min =
+ tm.hour = 0;
+ return wxDateTime(tm);
+}
+
+// ----------------------------------------------------------------------------
+// DOS Date and Time Format functions
+// ----------------------------------------------------------------------------
+// the dos date and time value is an unsigned 32 bit value in the format:
+// YYYYYYYMMMMDDDDDhhhhhmmmmmmsssss
+//
+// Y = year offset from 1980 (0-127)
+// M = month (1-12)
+// D = day of month (1-31)
+// h = hour (0-23)
+// m = minute (0-59)
+// s = bisecond (0-29) each bisecond indicates two seconds
+// ----------------------------------------------------------------------------
+
+wxDateTime& wxDateTime::SetFromDOS(unsigned long ddt)
+{
+ struct tm tm;
+ InitTm(tm);
+
+ long year = ddt & 0xFE000000;
+ year >>= 25;
+ year += 80;
+ tm.tm_year = year;
+
+ long month = ddt & 0x1E00000;
+ month >>= 21;
+ month -= 1;
+ tm.tm_mon = month;
+
+ long day = ddt & 0x1F0000;
+ day >>= 16;
+ tm.tm_mday = day;
+
+ long hour = ddt & 0xF800;
+ hour >>= 11;
+ tm.tm_hour = hour;
+
+ long minute = ddt & 0x7E0;
+ minute >>= 5;
+ tm.tm_min = minute;
+
+ long second = ddt & 0x1F;
+ tm.tm_sec = second * 2;
+
+ return Set(mktime(&tm));
+}
+
+unsigned long wxDateTime::GetAsDOS() const
+{
+ unsigned long ddt;
+ time_t ticks = GetTicks();
+ struct tm tmstruct;
+ struct tm *tm = wxLocaltime_r(&ticks, &tmstruct);
+ wxCHECK_MSG( tm, ULONG_MAX, wxT("time can't be represented in DOS format") );
+
+ long year = tm->tm_year;
+ year -= 80;
+ year <<= 25;
+
+ long month = tm->tm_mon;
+ month += 1;
+ month <<= 21;
+
+ long day = tm->tm_mday;
+ day <<= 16;
+
+ long hour = tm->tm_hour;
+ hour <<= 11;
+
+ long minute = tm->tm_min;
+ minute <<= 5;
+
+ long second = tm->tm_sec;
+ second /= 2;
+
+ ddt = year | month | day | hour | minute | second;
+ return ddt;
+}
+
+// ----------------------------------------------------------------------------
+// time_t <-> broken down time conversions
+// ----------------------------------------------------------------------------
+
+wxDateTime::Tm wxDateTime::GetTm(const TimeZone& tz) const
+{
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
+
+ time_t time = GetTicks();
+ if ( time != (time_t)-1 )
+ {
+ // use C RTL functions
+ struct tm tmstruct;
+ tm *tm;
+ if ( tz.GetOffset() == -GetTimeZone() )
+ {
+ // we are working with local time
+ tm = wxLocaltime_r(&time, &tmstruct);
+
+ // should never happen
+ wxCHECK_MSG( tm, Tm(), wxT("wxLocaltime_r() failed") );
+ }
+ else
+ {
+ time += (time_t)tz.GetOffset();
+#if defined(__VMS__) || defined(__WATCOMC__) // time is unsigned so avoid warning
+ int time2 = (int) time;
+ if ( time2 >= 0 )
+#else
+ if ( time >= 0 )
+#endif
+ {
+ tm = wxGmtime_r(&time, &tmstruct);
+
+ // should never happen
+ wxCHECK_MSG( tm, Tm(), wxT("wxGmtime_r() failed") );
+ }
+ else
+ {
+ tm = (struct tm *)NULL;
+ }
+ }
+
+ if ( tm )
+ {
+ // adjust the milliseconds
+ Tm tm2(*tm, tz);
+ long timeOnly = (m_time % MILLISECONDS_PER_DAY).ToLong();
+ tm2.msec = (wxDateTime_t)(timeOnly % 1000);
+ return tm2;
+ }
+ //else: use generic code below
+ }
+
+ // remember the time and do the calculations with the date only - this
+ // eliminates rounding errors of the floating point arithmetics
+
+ wxLongLong timeMidnight = m_time + tz.GetOffset() * 1000;
+
+ long timeOnly = (timeMidnight % MILLISECONDS_PER_DAY).ToLong();
+
+ // we want to always have positive time and timeMidnight to be really
+ // the midnight before it
+ if ( timeOnly < 0 )
+ {
+ timeOnly = MILLISECONDS_PER_DAY + timeOnly;
+ }
+
+ timeMidnight -= timeOnly;
+
+ // calculate the Gregorian date from JDN for the midnight of our date:
+ // this will yield day, month (in 1..12 range) and year
+
+ // actually, this is the JDN for the noon of the previous day
+ long jdn = (timeMidnight / MILLISECONDS_PER_DAY).ToLong() + EPOCH_JDN;
+
+ // CREDIT: code below is by Scott E. Lee (but bugs are mine)
+
+ wxASSERT_MSG( jdn > -2, wxT("JDN out of range") );
+
+ // calculate the century
+ long temp = (jdn + JDN_OFFSET) * 4 - 1;
+ long century = temp / DAYS_PER_400_YEARS;
+
+ // then the year and day of year (1 <= dayOfYear <= 366)
+ temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3;
+ long year = (century * 100) + (temp / DAYS_PER_4_YEARS);
+ long dayOfYear = (temp % DAYS_PER_4_YEARS) / 4 + 1;
+
+ // and finally the month and day of the month
+ temp = dayOfYear * 5 - 3;
+ long month = temp / DAYS_PER_5_MONTHS;
+ long day = (temp % DAYS_PER_5_MONTHS) / 5 + 1;
+
+ // month is counted from March - convert to normal
+ if ( month < 10 )
+ {
+ month += 3;
+ }
+ else
+ {
+ year += 1;
+ month -= 9;
+ }
+
+ // year is offset by 4800
+ year -= 4800;
+
+ // check that the algorithm gave us something reasonable
+ wxASSERT_MSG( (0 < month) && (month <= 12), wxT("invalid month") );
+ wxASSERT_MSG( (1 <= day) && (day < 32), wxT("invalid day") );
+
+ // construct Tm from these values
+ Tm tm;
+ tm.year = (int)year;
+ tm.yday = (wxDateTime_t)(dayOfYear - 1); // use C convention for day number
+ tm.mon = (Month)(month - 1); // algorithm yields 1 for January, not 0
+ tm.mday = (wxDateTime_t)day;
+ tm.msec = (wxDateTime_t)(timeOnly % 1000);
+ timeOnly -= tm.msec;
+ timeOnly /= 1000; // now we have time in seconds
+
+ tm.sec = (wxDateTime_t)(timeOnly % SEC_PER_MIN);
+ timeOnly -= tm.sec;
+ timeOnly /= SEC_PER_MIN; // now we have time in minutes
+
+ tm.min = (wxDateTime_t)(timeOnly % MIN_PER_HOUR);
+ timeOnly -= tm.min;
+
+ tm.hour = (wxDateTime_t)(timeOnly / MIN_PER_HOUR);
+
+ return tm;
+}
+
+wxDateTime& wxDateTime::SetYear(int year)
+{
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
+
+ Tm tm(GetTm());
+ tm.year = year;
+ Set(tm);
+
+ return *this;
+}
+
+wxDateTime& wxDateTime::SetMonth(Month month)
+{
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
+
+ Tm tm(GetTm());
+ tm.mon = month;
+ Set(tm);
+
+ return *this;
+}
+
+wxDateTime& wxDateTime::SetDay(wxDateTime_t mday)
+{
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
+
+ Tm tm(GetTm());
+ tm.mday = mday;
Set(tm);
return *this;
wxDateTime& wxDateTime::SetHour(wxDateTime_t hour)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
Tm tm(GetTm());
tm.hour = hour;
wxDateTime& wxDateTime::SetMinute(wxDateTime_t min)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
Tm tm(GetTm());
tm.min = min;
wxDateTime& wxDateTime::SetSecond(wxDateTime_t sec)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
Tm tm(GetTm());
tm.sec = sec;
wxDateTime& wxDateTime::SetMillisecond(wxDateTime_t millisecond)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
+ wxASSERT_MSG( IsValid(), wxT("invalid wxDateTime") );
// we don't need to use GetTm() for this one
m_time -= m_time % 1000l;
tm.year += diff.GetYears();
tm.AddMonths(diff.GetMonths());
+
+ // check that the resulting date is valid
+ if ( tm.mday > GetNumOfDaysInMonth(tm.year, tm.mon) )
+ {
+ // We suppose that when adding one month to Jan 31 we want to get Feb
+ // 28 (or 29), i.e. adding a month to the last day of the month should
+ // give the last day of the next month which is quite logical.
+ //
+ // Unfortunately, there is no logic way to understand what should
+ // Jan 30 + 1 month be - Feb 28 too or Feb 27 (assuming non leap year)?
+ // We make it Feb 28 (last day too), but it is highly questionable.
+ tm.mday = GetNumOfDaysInMonth(tm.year, tm.mon);
+ }
+
tm.AddDays(diff.GetTotalDays());
Set(tm);
+ wxASSERT_MSG( IsSameTime(tm),
+ wxT("Add(wxDateSpan) shouldn't modify time") );
+
return *this;
}
// Weekday and monthday stuff
// ----------------------------------------------------------------------------
+// convert Sun, Mon, ..., Sat into 6, 0, ..., 5
+static inline int ConvertWeekDayToMondayBase(int wd)
+{
+ return wd == wxDateTime::Sun ? 6 : wd - 1;
+}
+
+/* static */
+wxDateTime
+wxDateTime::SetToWeekOfYear(int year, wxDateTime_t numWeek, WeekDay wd)
+{
+ wxASSERT_MSG( numWeek > 0,
+ wxT("invalid week number: weeks are counted from 1") );
+
+ // Jan 4 always lies in the 1st week of the year
+ wxDateTime dt(4, Jan, year);
+ dt.SetToWeekDayInSameWeek(wd);
+ dt += wxDateSpan::Weeks(numWeek - 1);
+
+ return dt;
+}
+
+#if WXWIN_COMPATIBILITY_2_6
+// use a separate function to avoid warnings about using deprecated
+// SetToTheWeek in GetWeek below
+static wxDateTime
+SetToTheWeek(int year,
+ wxDateTime::wxDateTime_t numWeek,
+ wxDateTime::WeekDay weekday,
+ wxDateTime::WeekFlags flags)
+{
+ // Jan 4 always lies in the 1st week of the year
+ wxDateTime dt(4, wxDateTime::Jan, year);
+ dt.SetToWeekDayInSameWeek(weekday, flags);
+ dt += wxDateSpan::Weeks(numWeek - 1);
+
+ return dt;
+}
+
+bool wxDateTime::SetToTheWeek(wxDateTime_t numWeek,
+ WeekDay weekday,
+ WeekFlags flags)
+{
+ int year = GetYear();
+ *this = ::SetToTheWeek(year, numWeek, weekday, flags);
+ if ( GetYear() != year )
+ {
+ // oops... numWeek was too big
+ return false;
+ }
+
+ return true;
+}
+
+wxDateTime wxDateTime::GetWeek(wxDateTime_t numWeek,
+ WeekDay weekday,
+ WeekFlags flags) const
+{
+ return ::SetToTheWeek(GetYear(), numWeek, weekday, flags);
+}
+#endif // WXWIN_COMPATIBILITY_2_6
+
wxDateTime& wxDateTime::SetToLastMonthDay(Month month,
int year)
{
// take the current month/year if none specified
- ReplaceDefaultYearMonthWithCurrent(&year, &month);
+ if ( year == Inv_Year )
+ year = GetYear();
+ if ( month == Inv_Month )
+ month = GetMonth();
return Set(GetNumOfDaysInMonth(year, month), month, year);
}
+wxDateTime& wxDateTime::SetToWeekDayInSameWeek(WeekDay weekday, WeekFlags flags)
+{
+ wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") );
+
+ int wdayDst = weekday,
+ wdayThis = GetWeekDay();
+ if ( wdayDst == wdayThis )
+ {
+ // nothing to do
+ return *this;
+ }
+
+ if ( flags == Default_First )
+ {
+ flags = GetCountry() == USA ? Sunday_First : Monday_First;
+ }
+
+ // the logic below based on comparing weekday and wdayThis works if Sun (0)
+ // is the first day in the week, but breaks down for Monday_First case so
+ // we adjust the week days in this case
+ if ( flags == Monday_First )
+ {
+ if ( wdayThis == Sun )
+ wdayThis += 7;
+ if ( wdayDst == Sun )
+ wdayDst += 7;
+ }
+ //else: Sunday_First, nothing to do
+
+ // go forward or back in time to the day we want
+ if ( wdayDst < wdayThis )
+ {
+ return Subtract(wxDateSpan::Days(wdayThis - wdayDst));
+ }
+ else // weekday > wdayThis
+ {
+ return Add(wxDateSpan::Days(wdayDst - wdayThis));
+ }
+}
+
+wxDateTime& wxDateTime::SetToNextWeekDay(WeekDay weekday)
+{
+ wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") );
+
+ int diff;
+ WeekDay wdayThis = GetWeekDay();
+ if ( weekday == wdayThis )
+ {
+ // nothing to do
+ return *this;
+ }
+ else if ( weekday < wdayThis )
+ {
+ // need to advance a week
+ diff = 7 - (wdayThis - weekday);
+ }
+ else // weekday > wdayThis
+ {
+ diff = weekday - wdayThis;
+ }
+
+ return Add(wxDateSpan::Days(diff));
+}
+
+wxDateTime& wxDateTime::SetToPrevWeekDay(WeekDay weekday)
+{
+ wxDATETIME_CHECK( weekday != Inv_WeekDay, wxT("invalid weekday") );
+
+ int diff;
+ WeekDay wdayThis = GetWeekDay();
+ if ( weekday == wdayThis )
+ {
+ // nothing to do
+ return *this;
+ }
+ else if ( weekday > wdayThis )
+ {
+ // need to go to previous week
+ diff = 7 - (weekday - wdayThis);
+ }
+ else // weekday < wdayThis
+ {
+ diff = wdayThis - weekday;
+ }
+
+ return Subtract(wxDateSpan::Days(diff));
+}
+
bool wxDateTime::SetToWeekDay(WeekDay weekday,
int n,
Month month,
int year)
{
- wxCHECK_MSG( weekday != Inv_WeekDay, FALSE, _T("invalid weekday") );
+ wxCHECK_MSG( weekday != Inv_WeekDay, false, wxT("invalid weekday") );
- // we don't check explicitly that -5 <= n <= 5 because we will return FALSE
+ // we don't check explicitly that -5 <= n <= 5 because we will return false
// anyhow in such case - but may be should still give an assert for it?
// take the current month/year if none specified
// add advance n-1 weeks more
diff += 7*(n - 1);
- dt -= wxDateSpan::Days(diff);
+ dt += wxDateSpan::Days(diff);
}
- else
+ else // count from the end of the month
{
// get the last day of the month
dt.SetToLastMonthDay(month, year);
diff += 7;
// and rewind n-1 weeks from there
- diff += 7*(n - 1);
+ diff += 7*(-n - 1);
dt -= wxDateSpan::Days(diff);
}
{
*this = dt;
- return TRUE;
+ return true;
}
else
{
// no such day in this month
- return FALSE;
+ return false;
+ }
+}
+
+static inline
+wxDateTime::wxDateTime_t GetDayOfYearFromTm(const wxDateTime::Tm& tm)
+{
+ return (wxDateTime::wxDateTime_t)(gs_cumulatedDays[wxDateTime::IsLeapYear(tm.year)][tm.mon] + tm.mday);
+}
+
+wxDateTime::wxDateTime_t wxDateTime::GetDayOfYear(const TimeZone& tz) const
+{
+ return GetDayOfYearFromTm(GetTm(tz));
+}
+
+wxDateTime::wxDateTime_t
+wxDateTime::GetWeekOfYear(wxDateTime::WeekFlags flags, const TimeZone& tz) const
+{
+ if ( flags == Default_First )
+ {
+ flags = GetCountry() == USA ? Sunday_First : Monday_First;
+ }
+
+ Tm tm(GetTm(tz));
+ wxDateTime_t nDayInYear = GetDayOfYearFromTm(tm);
+
+ int wdTarget = GetWeekDay(tz);
+ int wdYearStart = wxDateTime(1, Jan, GetYear()).GetWeekDay();
+ int week;
+ if ( flags == Sunday_First )
+ {
+ // FIXME: First week is not calculated correctly.
+ week = (nDayInYear - wdTarget + 7) / 7;
+ if ( wdYearStart == Wed || wdYearStart == Thu )
+ week++;
+ }
+ else // week starts with monday
+ {
+ // adjust the weekdays to non-US style.
+ wdYearStart = ConvertWeekDayToMondayBase(wdYearStart);
+ wdTarget = ConvertWeekDayToMondayBase(wdTarget);
+
+ // quoting from http://www.cl.cam.ac.uk/~mgk25/iso-time.html:
+ //
+ // Week 01 of a year is per definition the first week that has the
+ // Thursday in this year, which is equivalent to the week that
+ // contains the fourth day of January. In other words, the first
+ // week of a new year is the week that has the majority of its
+ // days in the new year. Week 01 might also contain days from the
+ // previous year and the week before week 01 of a year is the last
+ // week (52 or 53) of the previous year even if it contains days
+ // from the new year. A week starts with Monday (day 1) and ends
+ // with Sunday (day 7).
+ //
+
+ // if Jan 1 is Thursday or less, it is in the first week of this year
+ if ( wdYearStart < 4 )
+ {
+ // count the number of entire weeks between Jan 1 and this date
+ week = (nDayInYear + wdYearStart + 6 - wdTarget)/7;
+
+ // be careful to check for overflow in the next year
+ if ( week == 53 && tm.mday - wdTarget > 28 )
+ week = 1;
+ }
+ else // Jan 1 is in the last week of the previous year
+ {
+ // check if we happen to be at the last week of previous year:
+ if ( tm.mon == Jan && tm.mday < 8 - wdYearStart )
+ week = wxDateTime(31, Dec, GetYear()-1).GetWeekOfYear();
+ else
+ week = (nDayInYear + wdYearStart - 1 - wdTarget)/7;
+ }
+ }
+
+ return (wxDateTime::wxDateTime_t)week;
+}
+
+wxDateTime::wxDateTime_t wxDateTime::GetWeekOfMonth(wxDateTime::WeekFlags flags,
+ const TimeZone& tz) const
+{
+ Tm tm = GetTm(tz);
+ const wxDateTime dateFirst = wxDateTime(1, tm.mon, tm.year);
+ const wxDateTime::WeekDay wdFirst = dateFirst.GetWeekDay();
+
+ if ( flags == Default_First )
+ {
+ flags = GetCountry() == USA ? Sunday_First : Monday_First;
+ }
+
+ // compute offset of dateFirst from the beginning of the week
+ int firstOffset;
+ if ( flags == Sunday_First )
+ firstOffset = wdFirst - Sun;
+ else
+ firstOffset = wdFirst == Sun ? DAYS_PER_WEEK - 1 : wdFirst - Mon;
+
+ return (wxDateTime::wxDateTime_t)((tm.mday - 1 + firstOffset)/7 + 1);
+}
+
+wxDateTime& wxDateTime::SetToYearDay(wxDateTime::wxDateTime_t yday)
+{
+ int year = GetYear();
+ wxDATETIME_CHECK( (0 < yday) && (yday <= GetNumberOfDays(year)),
+ wxT("invalid year day") );
+
+ bool isLeap = IsLeapYear(year);
+ for ( Month mon = Jan; mon < Inv_Month; wxNextMonth(mon) )
+ {
+ // for Dec, we can't compare with gs_cumulatedDays[mon + 1], but we
+ // don't need it neither - because of the CHECK above we know that
+ // yday lies in December then
+ if ( (mon == Dec) || (yday <= gs_cumulatedDays[isLeap][mon + 1]) )
+ {
+ Set((wxDateTime::wxDateTime_t)(yday - gs_cumulatedDays[isLeap][mon]), mon, year);
+
+ break;
+ }
}
+
+ return *this;
+}
+
+// ----------------------------------------------------------------------------
+// Julian day number conversion and related stuff
+// ----------------------------------------------------------------------------
+
+double wxDateTime::GetJulianDayNumber() const
+{
+ return m_time.ToDouble() / MILLISECONDS_PER_DAY + EPOCH_JDN + 0.5;
+}
+
+double wxDateTime::GetRataDie() const
+{
+ // March 1 of the year 0 is Rata Die day -306 and JDN 1721119.5
+ return GetJulianDayNumber() - 1721119.5 - 306;
}
// ----------------------------------------------------------------------------
-// timezone stuff
+// timezone and DST stuff
// ----------------------------------------------------------------------------
-wxDateTime& wxDateTime::MakeUTC()
+int wxDateTime::IsDST(wxDateTime::Country country) const
+{
+ wxCHECK_MSG( country == Country_Default, -1,
+ wxT("country support not implemented") );
+
+ // use the C RTL for the dates in the standard range
+ time_t timet = GetTicks();
+ if ( timet != (time_t)-1 )
+ {
+ struct tm tmstruct;
+ tm *tm = wxLocaltime_r(&timet, &tmstruct);
+
+ wxCHECK_MSG( tm, -1, wxT("wxLocaltime_r() failed") );
+
+ return tm->tm_isdst;
+ }
+ else
+ {
+ int year = GetYear();
+
+ if ( !IsDSTApplicable(year, country) )
+ {
+ // no DST time in this year in this country
+ return -1;
+ }
+
+ return IsBetween(GetBeginDST(year, country), GetEndDST(year, country));
+ }
+}
+
+wxDateTime& wxDateTime::MakeTimezone(const TimeZone& tz, bool noDST)
{
- return Add(wxTimeSpan::Seconds(GetTimeZone()));
+ long secDiff = GetTimeZone() + tz.GetOffset();
+
+ // we need to know whether DST is or not in effect for this date unless
+ // the test disabled by the caller
+ if ( !noDST && (IsDST() == 1) )
+ {
+ // FIXME we assume that the DST is always shifted by 1 hour
+ secDiff -= 3600;
+ }
+
+ return Add(wxTimeSpan::Seconds(secDiff));
}
-wxDateTime& wxDateTime::MakeTimezone(const TimeZone& tz)
+wxDateTime& wxDateTime::MakeFromTimezone(const TimeZone& tz, bool noDST)
{
- int minDiff = GetTimeZone() / SECONDS_IN_MINUTE + tz.GetOffset();
- return Add(wxTimeSpan::Minutes(minDiff));
+ long secDiff = GetTimeZone() + tz.GetOffset();
+
+ // we need to know whether DST is or not in effect for this date unless
+ // the test disabled by the caller
+ if ( !noDST && (IsDST() == 1) )
+ {
+ // FIXME we assume that the DST is always shifted by 1 hour
+ secDiff -= 3600;
+ }
+
+ return Subtract(wxTimeSpan::Seconds(secDiff));
}
-wxDateTime& wxDateTime::MakeLocalTime(const TimeZone& tz)
+// ============================================================================
+// wxDateTimeHolidayAuthority and related classes
+// ============================================================================
+
+#include "wx/arrimpl.cpp"
+
+WX_DEFINE_OBJARRAY(wxDateTimeArray)
+
+static int wxCMPFUNC_CONV
+wxDateTimeCompareFunc(wxDateTime **first, wxDateTime **second)
{
- int minDiff = GetTimeZone() / SECONDS_IN_MINUTE + tz.GetOffset();
- return Substract(wxTimeSpan::Minutes(minDiff));
+ wxDateTime dt1 = **first,
+ dt2 = **second;
+
+ return dt1 == dt2 ? 0 : dt1 < dt2 ? -1 : +1;
}
// ----------------------------------------------------------------------------
-// wxDateTime to/from text representations
+// wxDateTimeHolidayAuthority
// ----------------------------------------------------------------------------
-wxString wxDateTime::Format(const wxChar *format) const
+wxHolidayAuthoritiesArray wxDateTimeHolidayAuthority::ms_authorities;
+
+/* static */
+bool wxDateTimeHolidayAuthority::IsHoliday(const wxDateTime& dt)
{
- time_t time = GetTicks();
- if ( time != (time_t)-1 )
+ size_t count = ms_authorities.size();
+ for ( size_t n = 0; n < count; n++ )
{
- // use strftime()
- tm *tm = localtime(&time);
+ if ( ms_authorities[n]->DoIsHoliday(dt) )
+ {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/* static */
+size_t
+wxDateTimeHolidayAuthority::GetHolidaysInRange(const wxDateTime& dtStart,
+ const wxDateTime& dtEnd,
+ wxDateTimeArray& holidays)
+{
+ wxDateTimeArray hol;
- // should never happen
- wxCHECK_MSG( tm, _T(""), _T("localtime() failed") );
+ holidays.Clear();
- return CallStrftime(format, tm);
+ const size_t countAuth = ms_authorities.size();
+ for ( size_t nAuth = 0; nAuth < countAuth; nAuth++ )
+ {
+ ms_authorities[nAuth]->DoGetHolidaysInRange(dtStart, dtEnd, hol);
+
+ WX_APPEND_ARRAY(holidays, hol);
}
- else
+
+ holidays.Sort(wxDateTimeCompareFunc);
+
+ return holidays.size();
+}
+
+/* static */
+void wxDateTimeHolidayAuthority::ClearAllAuthorities()
+{
+ WX_CLEAR_ARRAY(ms_authorities);
+}
+
+/* static */
+void wxDateTimeHolidayAuthority::AddAuthority(wxDateTimeHolidayAuthority *auth)
+{
+ ms_authorities.push_back(auth);
+}
+
+wxDateTimeHolidayAuthority::~wxDateTimeHolidayAuthority()
+{
+ // required here for Darwin
+}
+
+// ----------------------------------------------------------------------------
+// wxDateTimeWorkDays
+// ----------------------------------------------------------------------------
+
+bool wxDateTimeWorkDays::DoIsHoliday(const wxDateTime& dt) const
+{
+ wxDateTime::WeekDay wd = dt.GetWeekDay();
+
+ return (wd == wxDateTime::Sun) || (wd == wxDateTime::Sat);
+}
+
+size_t wxDateTimeWorkDays::DoGetHolidaysInRange(const wxDateTime& dtStart,
+ const wxDateTime& dtEnd,
+ wxDateTimeArray& holidays) const
+{
+ if ( dtStart > dtEnd )
+ {
+ wxFAIL_MSG( wxT("invalid date range in GetHolidaysInRange") );
+
+ return 0u;
+ }
+
+ holidays.Empty();
+
+ // instead of checking all days, start with the first Sat after dtStart and
+ // end with the last Sun before dtEnd
+ wxDateTime dtSatFirst = dtStart.GetNextWeekDay(wxDateTime::Sat),
+ dtSatLast = dtEnd.GetPrevWeekDay(wxDateTime::Sat),
+ dtSunFirst = dtStart.GetNextWeekDay(wxDateTime::Sun),
+ dtSunLast = dtEnd.GetPrevWeekDay(wxDateTime::Sun),
+ dt;
+
+ for ( dt = dtSatFirst; dt <= dtSatLast; dt += wxDateSpan::Week() )
{
- wxFAIL_MSG(_T("TODO"));
+ holidays.Add(dt);
+ }
- return _T("");
+ for ( dt = dtSunFirst; dt <= dtSunLast; dt += wxDateSpan::Week() )
+ {
+ holidays.Add(dt);
}
+
+ return holidays.GetCount();
}
// ============================================================================
-// wxTimeSpan
+// other helper functions
// ============================================================================
-wxString wxTimeSpan::Format(const wxChar *format) const
+// ----------------------------------------------------------------------------
+// iteration helpers: can be used to write a for loop over enum variable like
+// this:
+// for ( m = wxDateTime::Jan; m < wxDateTime::Inv_Month; wxNextMonth(m) )
+// ----------------------------------------------------------------------------
+
+WXDLLIMPEXP_BASE void wxNextMonth(wxDateTime::Month& m)
+{
+ wxASSERT_MSG( m < wxDateTime::Inv_Month, wxT("invalid month") );
+
+ // no wrapping or the for loop above would never end!
+ m = (wxDateTime::Month)(m + 1);
+}
+
+WXDLLIMPEXP_BASE void wxPrevMonth(wxDateTime::Month& m)
+{
+ wxASSERT_MSG( m < wxDateTime::Inv_Month, wxT("invalid month") );
+
+ m = m == wxDateTime::Jan ? wxDateTime::Inv_Month
+ : (wxDateTime::Month)(m - 1);
+}
+
+WXDLLIMPEXP_BASE void wxNextWDay(wxDateTime::WeekDay& wd)
+{
+ wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, wxT("invalid week day") );
+
+ // no wrapping or the for loop above would never end!
+ wd = (wxDateTime::WeekDay)(wd + 1);
+}
+
+WXDLLIMPEXP_BASE void wxPrevWDay(wxDateTime::WeekDay& wd)
+{
+ wxASSERT_MSG( wd < wxDateTime::Inv_WeekDay, wxT("invalid week day") );
+
+ wd = wd == wxDateTime::Sun ? wxDateTime::Inv_WeekDay
+ : (wxDateTime::WeekDay)(wd - 1);
+}
+
+#ifdef __WXMSW__
+
+wxDateTime& wxDateTime::SetFromMSWSysTime(const SYSTEMTIME& st)
+{
+ return Set(st.wDay,
+ static_cast<wxDateTime::Month>(wxDateTime::Jan + st.wMonth - 1),
+ st.wYear,
+ st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
+}
+
+wxDateTime& wxDateTime::SetFromMSWSysDate(const SYSTEMTIME& st)
+{
+ return Set(st.wDay,
+ static_cast<wxDateTime::Month>(wxDateTime::Jan + st.wMonth - 1),
+ st.wYear,
+ 0, 0, 0, 0);
+}
+
+void wxDateTime::GetAsMSWSysTime(SYSTEMTIME* st) const
+{
+ const wxDateTime::Tm tm(GetTm());
+
+ st->wYear = (WXWORD)tm.year;
+ st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1);
+ st->wDay = tm.mday;
+
+ st->wDayOfWeek = 0;
+ st->wHour = tm.hour;
+ st->wMinute = tm.min;
+ st->wSecond = tm.sec;
+ st->wMilliseconds = tm.msec;
+}
+
+void wxDateTime::GetAsMSWSysDate(SYSTEMTIME* st) const
{
- wxFAIL_MSG( _T("TODO") );
+ const wxDateTime::Tm tm(GetTm());
- wxString str;
+ st->wYear = (WXWORD)tm.year;
+ st->wMonth = (WXWORD)(tm.mon - wxDateTime::Jan + 1);
+ st->wDay = tm.mday;
- return str;
+ st->wDayOfWeek =
+ st->wHour =
+ st->wMinute =
+ st->wSecond =
+ st->wMilliseconds = 0;
}
+
+#endif // __WXMSW__
+
+#endif // wxUSE_DATETIME
projects / wxWidgets.git / blobdiff