-/////////////////////////////////////////////////////////////////////////////
-// Name: wx/datetime.h
+///////////////////////////////////////////////////////////////////////////////
+// Name: src/common/datetime.cpp
// Purpose: implementation of time/date related classes
// 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"
+const long wxDateTime::TIME_T_FACTOR = 1000l;
+
+#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(HAVE_STRPTIME) && defined(__GLIBC__) && \
+ ((__GLIBC__ == 2) && (__GLIBC_MINOR__ == 0))
+ // glibc 2.0.7 strptime() is broken - the following snippet causes it to
+ // crash (instead of just failing):
+ //
+ // strncpy(buf, "Tue Dec 21 20:25:40 1999", 128);
+ // strptime(buf, "%x", &tm);
+ //
+ // so don't use it
+ #undef HAVE_STRPTIME
+#endif // broken strptime()
+
+#if defined(HAVE_STRPTIME) && defined(__DARWIN__) && defined(_MSL_USING_MW_C_HEADERS) && _MSL_USING_MW_C_HEADERS
+ // configure detects strptime as linkable because it's in the OS X
+ // System library but MSL headers don't declare it.
+
+// char *strptime(const char *, const char *, struct tm *);
+ // However, we DON'T want to just provide it here because we would
+ // crash and/or overwrite data when strptime from OS X tries
+ // to fill in MW's struct tm which is two fields shorter (no TZ stuff)
+ // So for now let's just say we don't have strptime
+ #undef HAVE_STRPTIME
+#endif
+
+#if defined(__MWERKS__) && wxUSE_UNICODE
+ #include <wtime.h>
+#endif
+
+#if !defined(WX_TIMEZONE) && !defined(WX_GMTOFF_IN_TM)
+ #if defined(__WXPALMOS__)
+ #define WX_GMTOFF_IN_TM
+ #elif defined(__BORLANDC__) || defined(__MINGW32__) || defined(__VISAGECPP__)
+ #define WX_TIMEZONE _timezone
+ #elif defined(__MWERKS__)
+ long wxmw_timezone = 28800;
+ #define WX_TIMEZONE wxmw_timezone
+ #elif defined(__DJGPP__) || defined(__WINE__)
+ #include <sys/timeb.h>
+ #include <values.h>
+ static long wxGetTimeZone()
+ {
+ static long timezone = MAXLONG; // invalid timezone
+ if (timezone == MAXLONG)
+ {
+ struct timeb tb;
+ ftime(&tb);
+ timezone = tb.timezone;
+ }
+ return timezone;
+ }
+ #define WX_TIMEZONE wxGetTimeZone()
+ #elif defined(__DARWIN__)
+ #define WX_GMTOFF_IN_TM
+ #elif defined(__WXWINCE__) && defined(__VISUALC8__)
+ // _timezone is not present in dynamic run-time library
+ #if 0
+ // Solution (1): use the function equivalent of _timezone
+ static long wxGetTimeZone()
+ {
+ static long s_Timezone = MAXLONG; // invalid timezone
+ if (s_Timezone == MAXLONG)
+ {
+ int t;
+ _get_timezone(& t);
+ s_Timezone = (long) t;
+ }
+ return s_Timezone;
+ }
+ #define WX_TIMEZONE wxGetTimeZone()
+ #elif 1
+ // Solution (2): using GetTimeZoneInformation
+ static long wxGetTimeZone()
+ {
+ static long timezone = MAXLONG; // invalid timezone
+ if (timezone == MAXLONG)
+ {
+ TIME_ZONE_INFORMATION tzi;
+ ::GetTimeZoneInformation(&tzi);
+ timezone = tzi.Bias;
+ }
+ return timezone;
+ }
+ #define WX_TIMEZONE wxGetTimeZone()
+ #else
+ // Old method using _timezone: this symbol doesn't exist in the dynamic run-time library (i.e. using /MD)
+ #define WX_TIMEZONE _timezone
+ #endif
+ #else // unknown platform - try timezone
+ #define WX_TIMEZONE timezone
+ #endif
+#endif // !WX_TIMEZONE && !WX_GMTOFF_IN_TM
+
+// everyone has strftime except Win CE unless VC8 is used
+#if !defined(__WXWINCE__) || defined(__VISUALC8__)
+ #define HAVE_STRFTIME
+#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
// ----------------------------------------------------------------------------
// 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 int HOURS_PER_DAY = 24;
static const long SECONDS_PER_DAY = 86400l;
+static const int DAYS_PER_WEEK = 7;
+
static const long MILLISECONDS_PER_DAY = 86400000l;
// this is the integral part of JDN of the midnight of Jan 1, 1970
// (i.e. JDN(Jan 1, 1970) = 2440587.5)
-static const int EPOCH_JDN = 2440587;
+static const long EPOCH_JDN = 2440587l;
+
+// used only in asserts
+#ifdef __WXDEBUG__
+// 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__
+
+// 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] =
+{
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 },
+ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 }
+};
// ----------------------------------------------------------------------------
-// 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: shows what the date really is
+#ifdef __WXDEBUG__
+extern const char *wxDumpDate(const wxDateTime* dt)
+{
+ static char buf[128];
+
+ wxString fmt(dt->Format("%Y-%m-%d (%a) %H:%M:%S"));
+ wxStrncpy(buf, fmt + " (" + dt->GetValue().ToString() + " ticks)",
+ WXSIZEOF(buf));
+
+ return buf;
+}
+#endif // Debug
+
// 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 daysInMonth[wxDateTime::IsLeapYear(year)][month];
}
-// ensure that the timezone variable is set by calling localtime
+// returns the time zone in the C sense, i.e. the difference UTC - local
+// (in seconds)
static int GetTimeZone()
{
- // set to TRUE when the timezone is set
- static bool s_timezoneSet = FALSE;
-
- wxCRIT_SECT_LOCKER(lock, gs_critsectTimezone);
+ // 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 )
{
- // just call localtime() instead of figurin out whether this system
- // supports tzset(), _tzset() or something else
- time_t t;
- (void)localtime(&t);
+ // 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;
+
+#ifdef WX_GMTOFF_IN_TM
+ // 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;
+#else // !WX_GMTOFF_IN_TM
+ gmtoffset = WX_TIMEZONE;
+#endif // WX_GMTOFF_IN_TM/!WX_GMTOFF_IN_TM
}
- return (int)timezone;
+ return (int)gmtoffset;
}
// 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)
+// 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: the algorithm was taken from Peter Baum's home page
-
- // the algorithm assumes Jan == 1
- int month = mon + 1;
-
- // we want the leap day (Feb 29) be at the end of the year, so we count
- // March as the first month
- if ( month < wxDateTime::Mar + 1 )
+ // 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)),
+ _T("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 += MONTHS_IN_YEAR;
- year--;
+ month = mon - 2;
}
-
- // this table contains the number of the days before the 1st of the each
- // month (in a non leap year) with the third value corresponding to March
- // (and the last one to February)
- static const int monthOffsets[14] =
+ else
{
- 0, 31, 61, 92, 122, 153, 184, 214, 245, 275, 306
- };
+ month = mon + 10;
+ year--;
+ }
- // and now add contributions of all terms together to get the result (you'd
- // better see the Web page for the description if you want to understand
- // why it works (if it does :-))
- return day +
- // linear approximation for months
- monthOffsets[month - (wxDateTime::Mar + 1)] +
- // the year contribution
- 365*year + year/4 - year/100 + year/400 +
- // 1721119.5 is the JDN of the midnight of Mar 1, year 0
- 1721118;
+ // 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 HAVE_STRFTIME
+
+// this function is a wrapper around strftime(3) adding error checking
+static 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?
+ // if the format is valid, buffer must be too small?
wxFAIL_MSG(_T("strftime() failed"));
+
+ buf[0] = '\0';
}
- return wxString(buf);
+ s = buf;
+ return s;
}
+#endif // HAVE_STRFTIME
+
+#ifdef HAVE_STRPTIME
+
+#if wxUSE_UNIX && !defined(HAVE_STRPTIME_DECL)
+ // configure detected that we had strptime() but not its declaration,
+ // provide it ourselves
+ extern "C" char *strptime(const char *, const char *, struct tm *);
+#endif
+
+// Unicode-friendly strptime() wrapper
+static const wxStringCharType *
+CallStrptime(const wxStringCharType *input, const char *fmt, tm *tm)
+{
+ // the problem here is that strptime() returns pointer into the string we
+ // passed to it while we're really interested in the pointer into the
+ // original, Unicode, string so we try to transform the pointer back
+#if wxUSE_UNICODE_WCHAR
+ wxCharBuffer inputMB(wxConvertWX2MB(input));
+#else // ASCII
+ const char * const inputMB = input;
+#endif // Unicode/Ascii
+
+ const char *result = strptime(inputMB, fmt, tm);
+ if ( !result )
+ return NULL;
+
+#if wxUSE_UNICODE_WCHAR
+ // FIXME: this is wrong in presence of surrogates &c
+ return input + (result - inputMB.data());
+#else // ASCII
+ return result;
+#endif // Unicode/Ascii
+}
+
+#endif // HAVE_STRPTIME
+
// 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;
}
}
+// fll the struct tm with default values
+static 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
+}
+
+// parsing helpers
+// ---------------
+
+// return the month if the string is a month name or Inv_Month otherwise
+static wxDateTime::Month GetMonthFromName(const wxString& name, int flags)
+{
+ wxDateTime::Month mon;
+ for ( mon = wxDateTime::Jan; mon < wxDateTime::Inv_Month; wxNextMonth(mon) )
+ {
+ // case-insensitive comparison either one of or with both abbreviated
+ // and not versions
+ if ( flags & wxDateTime::Name_Full )
+ {
+ if ( name.CmpNoCase(wxDateTime::
+ GetMonthName(mon, wxDateTime::Name_Full)) == 0 )
+ {
+ break;
+ }
+ }
+
+ if ( flags & wxDateTime::Name_Abbr )
+ {
+ if ( name.CmpNoCase(wxDateTime::
+ GetMonthName(mon, wxDateTime::Name_Abbr)) == 0 )
+ {
+ break;
+ }
+ }
+ }
+
+ return mon;
+}
+
+// return the weekday if the string is a weekday name or Inv_WeekDay otherwise
+static wxDateTime::WeekDay GetWeekDayFromName(const wxString& name, int flags)
+{
+ wxDateTime::WeekDay wd;
+ for ( wd = wxDateTime::Sun; wd < wxDateTime::Inv_WeekDay; wxNextWDay(wd) )
+ {
+ // case-insensitive comparison either one of or with both abbreviated
+ // and not versions
+ if ( flags & wxDateTime::Name_Full )
+ {
+ if ( name.CmpNoCase(wxDateTime::
+ GetWeekDayName(wd, wxDateTime::Name_Full)) == 0 )
+ {
+ break;
+ }
+ }
+
+ if ( flags & wxDateTime::Name_Abbr )
+ {
+ if ( name.CmpNoCase(wxDateTime::
+ GetWeekDayName(wd, wxDateTime::Name_Abbr)) == 0 )
+ {
+ break;
+ }
+ }
+ }
+
+ return wd;
+}
+
+/* static */
+struct tm *wxDateTime::GetTmNow(struct tm *tmstruct)
+{
+ time_t t = GetTimeNow();
+ return wxLocaltime_r(&t, tmstruct);
+}
+
+// scans all digits (but no more than len) and returns the resulting number
+static bool GetNumericToken(size_t len,
+ const wxStringCharType*& p,
+ unsigned long *number)
+{
+ size_t n = 1;
+ wxString s;
+ while ( wxIsdigit(*p) )
+ {
+ s += *p++;
+
+ if ( len && ++n > len )
+ break;
+ }
+
+ return !s.empty() && s.ToULong(number);
+}
+
+// scans all alphabetic characters and returns the resulting string
+static wxString GetAlphaToken(const wxStringCharType*& p)
+{
+ wxString s;
+ while ( wxIsalpha(*p) )
+ {
+ s += *p++;
+ }
+
+ return s;
+}
+
// ============================================================================
// implementation of wxDateTime
// ============================================================================
-// ----------------------------------------------------------------------------
-// static data
-// ----------------------------------------------------------------------------
-
-wxDateTime::Country wxDateTime::ms_country = wxDateTime::Country_Unknown;
-wxDateTime wxDateTime::ms_InvDateTime;
-
// ----------------------------------------------------------------------------
// struct Tm
// ----------------------------------------------------------------------------
wday = wxDateTime::Inv_WeekDay;
}
-wxDateTime::Tm::Tm(const struct tm& tm)
+wxDateTime::Tm::Tm(const struct tm& tm, const TimeZone& tz)
+ : m_tz(tz)
{
msec = 0;
- sec = tm.tm_sec;
- min = tm.tm_min;
- hour = tm.tm_hour;
- mday = tm.tm_mday;
+ 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
{
// 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)) &&
+ (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(int monDiff)
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 < MONTHS_IN_YEAR, _T("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(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);
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 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)
{
{
case Gregorian:
return Now().GetMonth();
- break;
case Julian:
wxFAIL_MSG(_T("TODO"));
case Gregorian:
case Julian:
return IsLeapYear(year) ? 366 : 365;
- break;
default:
wxFAIL_MSG(_T("unsupported calendar"));
}
/* static */
-wxString wxDateTime::GetMonthName(wxDateTime::Month month, bool abbr)
+wxString wxDateTime::GetMonthName(wxDateTime::Month month,
+ wxDateTime::NameFlags flags)
{
- 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);
+ wxCHECK_MSG( month != Inv_Month, wxEmptyString, _T("invalid month") );
+#ifdef HAVE_STRFTIME
+ // 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 ? _T("%b") : _T("%B"), &tm);
+#else // !HAVE_STRFTIME
+ wxString ret;
+ switch(month)
+ {
+ case Jan:
+ ret = (flags == Name_Abbr ? wxT("Jan"): wxT("January"));
+ break;
+ case Feb:
+ ret = (flags == Name_Abbr ? wxT("Feb"): wxT("Febuary"));
+ break;
+ case Mar:
+ ret = (flags == Name_Abbr ? wxT("Mar"): wxT("March"));
+ break;
+ case Apr:
+ ret = (flags == Name_Abbr ? wxT("Apr"): wxT("April"));
+ break;
+ case May:
+ ret = (flags == Name_Abbr ? wxT("May"): wxT("May"));
+ break;
+ case Jun:
+ ret = (flags == Name_Abbr ? wxT("Jun"): wxT("June"));
+ break;
+ case Jul:
+ ret = (flags == Name_Abbr ? wxT("Jul"): wxT("July"));
+ break;
+ case Aug:
+ ret = (flags == Name_Abbr ? wxT("Aug"): wxT("August"));
+ break;
+ case Sep:
+ ret = (flags == Name_Abbr ? wxT("Sep"): wxT("September"));
+ break;
+ case Oct:
+ ret = (flags == Name_Abbr ? wxT("Oct"): wxT("October"));
+ break;
+ case Nov:
+ ret = (flags == Name_Abbr ? wxT("Nov"): wxT("November"));
+ break;
+ case Dec:
+ ret = (flags == Name_Abbr ? wxT("Dec"): wxT("December"));
+ break;
+ }
+ return ret;
+#endif // HAVE_STRFTIME/!HAVE_STRFTIME
}
/* static */
-wxString wxDateTime::GetWeekDayName(wxDateTime::WeekDay wday, bool abbr)
+wxString wxDateTime::GetWeekDayName(wxDateTime::WeekDay wday,
+ wxDateTime::NameFlags flags)
{
- wxCHECK_MSG( wday != Inv_WeekDay, _T(""), _T("invalid weekday") );
+ wxCHECK_MSG( wday != Inv_WeekDay, wxEmptyString, _T("invalid weekday") );
+#ifdef HAVE_STRFTIME
+ // 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;
- // take some arbitrary Sunday
- tm tm = { 0, 0, 0, 28, Nov, 99 };
+ // call mktime() to normalize it...
+ (void)mktime(&tm);
- // and offset it by the number of days needed to get
- tm.tm_mday += wday;
+ // ... and call strftime()
+ return CallStrftime(flags == Name_Abbr ? _T("%a") : _T("%A"), &tm);
+#else // !HAVE_STRFTIME
+ wxString ret;
+ switch(wday)
+ {
+ case Sun:
+ ret = (flags == Name_Abbr ? wxT("Sun") : wxT("Sunday"));
+ break;
+ case Mon:
+ ret = (flags == Name_Abbr ? wxT("Mon") : wxT("Monday"));
+ break;
+ case Tue:
+ ret = (flags == Name_Abbr ? wxT("Tue") : wxT("Tuesday"));
+ break;
+ case Wed:
+ ret = (flags == Name_Abbr ? wxT("Wed") : wxT("Wednesday"));
+ break;
+ case Thu:
+ ret = (flags == Name_Abbr ? wxT("Thu") : wxT("Thursday"));
+ break;
+ case Fri:
+ ret = (flags == Name_Abbr ? wxT("Fri") : wxT("Friday"));
+ break;
+ case Sat:
+ ret = (flags == Name_Abbr ? wxT("Sat") : wxT("Saturday"));
+ break;
+ }
+ return ret;
+#endif // HAVE_STRFTIME/!HAVE_STRFTIME
+}
- return CallStrftime(abbr ? _T("%a") : _T("%A"), &tm);
+/* 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 )
+ {
+ if (wxStrftime(buffer, sizeof(buffer)/sizeof(wxChar), _T("%p"), &tm) > 0)
+ *am = wxString(buffer);
+ else
+ *am = wxString();
+ }
+ if ( pm )
+ {
+ tm.tm_hour = 13;
+ if (wxStrftime(buffer, sizeof(buffer)/sizeof(wxChar), _T("%p"), &tm) > 0)
+ *pm = wxString(buffer);
+ else
+ *pm = wxString();
+ }
}
// ----------------------------------------------------------------------------
-// constructors and assignment operators
+// Country stuff: date calculations depend on the country (DST, work days,
+// ...), so we need to know which rules to follow.
// ----------------------------------------------------------------------------
-wxDateTime& wxDateTime::Set(const struct tm& tm1)
+/* static */
+wxDateTime::Country wxDateTime::GetCountry()
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- tm tm2(tm1);
- time_t timet = mktime(&tm2);
- if ( timet == (time_t)(-1) )
+ // TODO use LOCALE_ICOUNTRY setting under Win32
+#ifndef __WXWINCE__
+ if ( ms_country == Country_Unknown )
{
- wxFAIL_MSG(_T("Invalid time"));
+ // try to guess from the time zone name
+ time_t t = time(NULL);
+ struct tm tmstruct;
+ struct tm *tm = wxLocaltime_r(&t, &tmstruct);
- return ms_InvDateTime;
- }
- else
- {
- return Set(timet);
+ wxString tz = CallStrftime(_T("%Z"), tm);
+ if ( tz == _T("WET") || tz == _T("WEST") )
+ {
+ ms_country = UK;
+ }
+ else if ( tz == _T("CET") || tz == _T("CEST") )
+ {
+ ms_country = Country_EEC;
+ }
+ else if ( tz == _T("MSK") || tz == _T("MSD") )
+ {
+ ms_country = Russia;
+ }
+ else if ( tz == _T("AST") || tz == _T("ADT") ||
+ tz == _T("EST") || tz == _T("EDT") ||
+ tz == _T("CST") || tz == _T("CDT") ||
+ tz == _T("MST") || tz == _T("MDT") ||
+ tz == _T("PST") || tz == _T("PDT") )
+ {
+ ms_country = USA;
+ }
+ else
+ {
+ // well, choose a default one
+ ms_country = USA;
+ }
}
+#else // __WXWINCE__
+ ms_country = USA;
+#endif // !__WXWINCE__/__WXWINCE__
+
+ return ms_country;
}
-wxDateTime& wxDateTime::Set(wxDateTime_t hour,
- wxDateTime_t minute,
- wxDateTime_t second,
- wxDateTime_t millisec)
+/* static */
+void wxDateTime::SetCountry(wxDateTime::Country country)
{
- 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()") );
-
- // get the current date from system
- time_t timet = GetTimeNow();
- struct tm *tm = localtime(&timet);
+ ms_country = country;
+}
+
+/* static */
+bool wxDateTime::IsWestEuropeanCountry(Country country)
+{
+ if ( country == Country_Default )
+ {
+ country = GetCountry();
+ }
+
+ return (Country_WesternEurope_Start <= country) &&
+ (country <= Country_WesternEurope_End);
+}
+
+// ----------------------------------------------------------------------------
+// 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!
+// ----------------------------------------------------------------------------
+
+/* 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( _T("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( _T("no first Sunday in April?") );
+ }
+ }
+ else
+ {
+ if ( !dt.SetToWeekDay(Sun, 1, Apr, year) )
+ {
+ // weird...
+ wxFAIL_MSG( _T("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( _T("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:
+ // DST ends at 2 a.m. on the last Sunday of October
+ if ( !dt.SetToLastWeekDay(Sun, Oct, year) )
+ {
+ // weirder and weirder...
+ wxFAIL_MSG( _T("no last Sunday in October?") );
+ }
+
+ dt += wxTimeSpan::Hours(2);
+
+ // TODO what about timezone??
+ }
+ break;
+
+ default:
+ // 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( _T("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,
+ _T("Invalid time in wxDateTime::Set()") );
+
+ // get the current date from system
+ struct tm tmstruct;
+ struct tm *tm = GetTmNow(&tmstruct);
+
+ wxDATETIME_CHECK( tm, _T("wxLocaltime_r() failed") );
+
+ // make a copy so it isn't clobbered by the call to mktime() below
+ struct tm tm1(*tm);
// adjust the time
- tm->tm_hour = hour;
- tm->tm_min = minute;
- tm->tm_sec = second;
+ tm1.tm_hour = hour;
+ tm1.tm_min = minute;
+ tm1.tm_sec = second;
- (void)Set(*tm);
+ // 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_t second,
wxDateTime_t millisec)
{
- wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
-
- wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
- ms_InvDateTime,
- _T("Invalid time in wxDateTime::Set()") );
+ wxDATETIME_CHECK( hour < 24 &&
+ second < 62 &&
+ minute < 60 &&
+ millisec < 1000,
+ _T("Invalid time in wxDateTime::Set()") );
ReplaceDefaultYearMonthWithCurrent(&year, &month);
- wxCHECK_MSG( day <= GetNumberOfDays(month, year), ms_InvDateTime,
- _T("Invalid date in wxDateTime::Set()") );
+ wxDATETIME_CHECK( (0 < day) && (day <= GetNumberOfDays(month, year)),
+ _T("Invalid date in wxDateTime::Set()") );
// the range of time_t type (inclusive)
static const int yearMinInRange = 1970;
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
- return SetMillisecond(millisec);
+ if (IsValid())
+ SetMillisecond(millisec);
+
+ return *this;
}
else
{
m_time -= EPOCH_JDN;
m_time *= SECONDS_PER_DAY * TIME_T_FACTOR;
- Add(wxTimeSpan(hour, minute, second, millisec));
+ // JDN corresponds to GMT, we take localtime
+ Add(wxTimeSpan(hour, minute, second + GetTimeZone(), millisec));
}
return *this;
wxDateTime& wxDateTime::Set(double jdn)
{
- m_time = (jdn - 0.5 - EPOCH_JDN) * TIME_T_FACTOR;
+ // 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, _T("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
+wxDateTime::Tm wxDateTime::GetTm(const TimeZone& tz) const
{
wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
if ( time != (time_t)-1 )
{
// use C RTL functions
- tm *tm = localtime(&time);
+ 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(), _T("localtime() failed") );
+ // should never happen
+ wxCHECK_MSG( tm, Tm(), _T("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);
- return Tm(*tm);
- }
- else
- {
- // CREDIT: the algorithm was taken from Peter Baum's home page
-
- // calculate the Gregorian date from JDN for the midnight of our date
- wxLongLong timeMidnight = m_time;
- long timeOnly = (m_time % MILLISECONDS_PER_DAY).GetLo();
- timeMidnight -= timeOnly;
-
- // TODO this probably could be optimised somehow...
-
- double jdn = (timeMidnight / MILLISECONDS_PER_DAY).GetLo();
- jdn += EPOCH_JDN + 0.5;
- long z = jdn - 1721118.5;
- double r = jdn - 1721118.5 - z;
- double g = z - 0.25;
- long a = g/36524.25; // number of days per year
- long b = a - a / 4;
- int year = (b + g) / 365.25;
- long c = b + z - 365.25*year;
- int month = (5*c + 456)/153;
- int day = c - (153*month - 457)/5 + (r < 0.5 ? 0 : 1);
- if ( month > 12 )
+ // should never happen
+ wxCHECK_MSG( tm, Tm(), _T("wxGmtime_r() failed") );
+ }
+ else
+ {
+ tm = (struct tm *)NULL;
+ }
+ }
+
+ if ( tm )
{
- year++;
- month -= 12;
+ // 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
+ }
- Tm tm;
- tm.year = year;
- tm.mon = (Month)(month - 1); // algorithm yields 1 for January, not 0
- tm.mday = day;
- tm.msec = timeOnly % 1000;
- timeOnly -= tm.msec;
- timeOnly /= 1000; // now we have time in seconds
+ // 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;
- tm.sec = timeOnly % 60;
- timeOnly -= tm.sec;
- timeOnly /= 60; // now we have time in minutes
+ // CREDIT: code below is by Scott E. Lee (but bugs are mine)
- tm.min = timeOnly % 60;
- timeOnly -= tm.min;
+ wxASSERT_MSG( jdn > -2, _T("JDN out of range") );
- tm.hour = timeOnly / 60;
+ // calculate the century
+ long temp = (jdn + JDN_OFFSET) * 4 - 1;
+ long century = temp / DAYS_PER_400_YEARS;
- return tm;
+ // 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), _T("invalid month") );
+ wxASSERT_MSG( (1 <= day) && (day < 32), _T("invalid day") );
+
+ // construct Tm from these values
+ Tm tm;
+ tm.year = (int)year;
+ 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)
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),
+ _T("Add(wxDateSpan) shouldn't modify time") );
+
return *this;
}
// Weekday and monthday stuff
// ----------------------------------------------------------------------------
-wxDateTime& wxDateTime::SetToLastMonthDay(Month month,
- int year)
+// convert Sun, Mon, ..., Sat into 6, 0, ..., 5
+static inline int ConvertWeekDayToMondayBase(int wd)
{
- // take the current month/year if none specified
- ReplaceDefaultYearMonthWithCurrent(&year, &month);
-
- return Set(GetNumOfDaysInMonth(year, month), month, year);
+ return wd == wxDateTime::Sun ? 6 : wd - 1;
}
-bool wxDateTime::SetToWeekDay(WeekDay weekday,
- int n,
- Month month,
- int year)
+/* static */
+wxDateTime
+wxDateTime::SetToWeekOfYear(int year, wxDateTime_t numWeek, WeekDay wd)
{
- wxCHECK_MSG( weekday != Inv_WeekDay, FALSE, _T("invalid weekday") );
+ wxASSERT_MSG( numWeek > 0,
+ _T("invalid week number: weeks are counted from 1") );
- // 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?
+ // Jan 4 always lies in the 1st week of the year
+ wxDateTime dt(4, Jan, year);
+ dt.SetToWeekDayInSameWeek(wd);
+ dt += wxDateSpan::Weeks(numWeek - 1);
- // take the current month/year if none specified
- ReplaceDefaultYearMonthWithCurrent(&year, &month);
+ return dt;
+}
- wxDateTime 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);
- // TODO this probably could be optimised somehow...
+ return dt;
+}
- if ( n > 0 )
+bool wxDateTime::SetToTheWeek(wxDateTime_t numWeek,
+ WeekDay weekday,
+ WeekFlags flags)
+{
+ int year = GetYear();
+ *this = ::SetToTheWeek(year, numWeek, weekday, flags);
+ if ( GetYear() != year )
{
- // get the first day of the month
- dt.Set(1, month, year);
+ // oops... numWeek was too big
+ return false;
+ }
- // get its wday
- WeekDay wdayFirst = dt.GetWeekDay();
+ return true;
+}
- // go to the first weekday of the month
- int diff = weekday - wdayFirst;
- if ( diff < 0 )
+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
+ 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, _T("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, _T("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, _T("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") );
+
+ // 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
+ ReplaceDefaultYearMonthWithCurrent(&year, &month);
+
+ wxDateTime dt;
+
+ // TODO this probably could be optimised somehow...
+
+ if ( n > 0 )
+ {
+ // get the first day of the month
+ dt.Set(1, month, year);
+
+ // get its wday
+ WeekDay wdayFirst = dt.GetWeekDay();
+
+ // go to the first weekday of the month
+ int diff = weekday - wdayFirst;
+ if ( diff < 0 )
diff += 7;
// 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);
+ wxDateTime dtMonthStart = wxDateTime(1, tm.mon, tm.year);
+ int nWeek = GetWeekOfYear(flags) - dtMonthStart.GetWeekOfYear(flags) + 1;
+ if ( nWeek < 0 )
+ {
+ // this may happen for January when Jan, 1 is the last week of the
+ // previous year
+ nWeek += IsLeapYear(tm.year - 1) ? 53 : 52;
+ }
+
+ return (wxDateTime::wxDateTime_t)nWeek;
+}
+
+wxDateTime& wxDateTime::SetToYearDay(wxDateTime::wxDateTime_t yday)
+{
+ int year = GetYear();
+ wxDATETIME_CHECK( (0 < yday) && (yday <= GetNumberOfDays(year)),
+ _T("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;
}
// ----------------------------------------------------------------------------
double wxDateTime::GetJulianDayNumber() const
{
- Tm tm(GetTm());
-
- double result = GetTruncatedJDN(tm.mday, tm.mon, tm.year);
-
- // add the part GetTruncatedJDN() neglected
- result += 0.5;
-
- // and now add the time: 86400 sec = 1 JDN
- return result + ((double)(60*(60*tm.hour + tm.min) + tm.sec)) / 86400;
+ return m_time.ToDouble() / MILLISECONDS_PER_DAY + EPOCH_JDN + 0.5;
}
double wxDateTime::GetRataDie() const
}
// ----------------------------------------------------------------------------
-// timezone stuff
+// timezone and DST stuff
// ----------------------------------------------------------------------------
-wxDateTime& wxDateTime::MakeUTC()
+int wxDateTime::IsDST(wxDateTime::Country country) const
{
- return Add(wxTimeSpan::Seconds(GetTimeZone()));
+ wxCHECK_MSG( country == Country_Default, -1,
+ _T("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, _T("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)
+wxDateTime& wxDateTime::MakeTimezone(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 Add(wxTimeSpan::Seconds(secDiff));
}
-wxDateTime& wxDateTime::MakeLocalTime(const TimeZone& tz)
+wxDateTime& wxDateTime::MakeFromTimezone(const TimeZone& tz, bool noDST)
{
- int minDiff = GetTimeZone() / SECONDS_IN_MINUTE + tz.GetOffset();
- return Substract(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 to/from text representations
// ----------------------------------------------------------------------------
-wxString wxDateTime::Format(const wxChar *format) const
+wxString wxDateTime::Format(const wxString& format, const TimeZone& tz) const
{
- wxCHECK_MSG( format, _T(""), _T("NULL format in wxDateTime::Format") );
+ wxCHECK_MSG( !format.empty(), wxEmptyString,
+ _T("NULL format in wxDateTime::Format") );
+ // we have to use our own implementation if the date is out of range of
+ // strftime() or if we use non standard specificators
+#ifdef HAVE_STRFTIME
time_t time = GetTicks();
- if ( time != (time_t)-1 )
+
+ if ( (time != (time_t)-1) && !wxStrstr(format, _T("%l")) )
{
// use strftime()
- tm *tm = localtime(&time);
+ struct tm tmstruct;
+ struct tm *tm;
+ if ( tz.GetOffset() == -GetTimeZone() )
+ {
+ // we are working with local time
+ tm = wxLocaltime_r(&time, &tmstruct);
+
+ // should never happen
+ wxCHECK_MSG( tm, wxEmptyString, _T("wxLocaltime_r() failed") );
+ }
+ else
+ {
+ time += (int)tz.GetOffset();
- // should never happen
- wxCHECK_MSG( tm, _T(""), _T("localtime() failed") );
+#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, wxEmptyString, _T("wxGmtime_r() failed") );
+ }
+ else
+ {
+ tm = (struct tm *)NULL;
+ }
+ }
- return CallStrftime(format, tm);
+ if ( tm )
+ {
+ return CallStrftime(format, tm);
+ }
}
- else
+ //else: use generic code below
+#endif // HAVE_STRFTIME
+
+ // we only parse ANSI C format specifications here, no POSIX 2
+ // complications, no GNU extensions but we do add support for a "%l" format
+ // specifier allowing to get the number of milliseconds
+ Tm tm = GetTm(tz);
+
+ // used for calls to strftime() when we only deal with time
+ struct tm tmTimeOnly;
+ tmTimeOnly.tm_hour = tm.hour;
+ tmTimeOnly.tm_min = tm.min;
+ tmTimeOnly.tm_sec = tm.sec;
+ tmTimeOnly.tm_wday = 0;
+ tmTimeOnly.tm_yday = 0;
+ tmTimeOnly.tm_mday = 1; // any date will do
+ tmTimeOnly.tm_mon = 0;
+ tmTimeOnly.tm_year = 76;
+ tmTimeOnly.tm_isdst = 0; // no DST, we adjust for tz ourselves
+
+ wxString tmp, res, fmt;
+ for ( wxString::const_iterator p = format.begin(); p != format.end(); ++p )
{
- // use a hack and still use strftime(): make a copy of the format and
- // replace all occurences of YEAR in it with some unique string not
- // appearing anywhere else in it, then use strftime() to format the
- // date in year YEAR and then replace YEAR back by the real year and
- // the unique replacement string back with YEAR where YEAR is any year
- // in the range supported by strftime() (1970 - 2037) which is equal to
- // the real year modulo 28 (so the week days coincide for them)
-
- // find the YEAR
- int yearReal = GetYear();
- int year = 1970 + yearReal % 28;
-
- wxString strYear;
- strYear.Printf(_T("%d"), year);
-
- // find a string not occuring in format (this is surely not optimal way
- // of doing it... improvements welcome!)
- wxString fmt = format;
- wxString replacement = (wxChar)-1;
- while ( fmt.Find(replacement) != wxNOT_FOUND )
+ if ( *p != _T('%') )
{
- replacement << (wxChar)-1;
+ // copy as is
+ res += *p;
+
+ continue;
}
- // replace all occurences of year with it
- bool wasReplaced = fmt.Replace(strYear, replacement) > 0;
+ // set the default format
+ switch ( (*++p).GetValue() )
+ {
+ case _T('Y'): // year has 4 digits
+ fmt = _T("%04d");
+ break;
+
+ case _T('j'): // day of year has 3 digits
+ case _T('l'): // milliseconds have 3 digits
+ fmt = _T("%03d");
+ break;
+
+ case _T('w'): // week day as number has only one
+ fmt = _T("%d");
+ break;
+
+ default:
+ // it's either another valid format specifier in which case
+ // the format is "%02d" (for all the rest) or we have the
+ // field width preceding the format in which case it will
+ // override the default format anyhow
+ fmt = _T("%02d");
+ }
- // use strftime() to format the same date but in supported year
- wxDateTime dt(*this);
- dt.SetYear(year);
- wxString str = dt.Format(format);
+ bool restart = true;
+ while ( restart )
+ {
+ restart = false;
- // now replace the occurence of 1999 with the real year
- wxString strYearReal;
- strYearReal.Printf(_T("%d"), yearReal);
- str.Replace(strYear, strYearReal);
+ // start of the format specification
+ switch ( (*p).GetValue() )
+ {
+ case _T('a'): // a weekday name
+ case _T('A'):
+ // second parameter should be true for abbreviated names
+ res += GetWeekDayName(tm.GetWeekDay(),
+ *p == _T('a') ? Name_Abbr : Name_Full);
+ break;
- // and replace back all occurences of replacement string
- if ( wasReplaced )
- str.Replace(replacement, strYear);
+ case _T('b'): // a month name
+ case _T('B'):
+ res += GetMonthName(tm.mon,
+ *p == _T('b') ? Name_Abbr : Name_Full);
+ break;
- return str;
- }
-}
+ case _T('c'): // locale default date and time representation
+ case _T('x'): // locale default date representation
+#ifdef HAVE_STRFTIME
+ //
+ // the problem: there is no way to know what do these format
+ // specifications correspond to for the current locale.
+ //
+ // the solution: use a hack and still use strftime(): first
+ // find the YEAR which is a year in the strftime() range (1970
+ // - 2038) whose Jan 1 falls on the same week day as the Jan 1
+ // of the real year. Then make a copy of the format and
+ // replace all occurrences of YEAR in it with some unique
+ // string not appearing anywhere else in it, then use
+ // strftime() to format the date in year YEAR and then replace
+ // YEAR back by the real year and the unique replacement
+ // string back with YEAR. Notice that "all occurrences of YEAR"
+ // means all occurrences of 4 digit as well as 2 digit form!
+ //
+ // the bugs: we assume that neither of %c nor %x contains any
+ // fields which may change between the YEAR and real year. For
+ // example, the week number (%U, %W) and the day number (%j)
+ // will change if one of these years is leap and the other one
+ // is not!
+ {
+ // find the YEAR: normally, for any year X, Jan 1 of the
+ // year X + 28 is the same weekday as Jan 1 of X (because
+ // the weekday advances by 1 for each normal X and by 2
+ // for each leap X, hence by 5 every 4 years or by 35
+ // which is 0 mod 7 every 28 years) but this rule breaks
+ // down if there are years between X and Y which are
+ // divisible by 4 but not leap (i.e. divisible by 100 but
+ // not 400), hence the correction.
+
+ int yearReal = GetYear(tz);
+ int mod28 = yearReal % 28;
+
+ // be careful to not go too far - we risk to leave the
+ // supported range
+ int year;
+ if ( mod28 < 10 )
+ {
+ year = 1988 + mod28; // 1988 == 0 (mod 28)
+ }
+ else
+ {
+ year = 1970 + mod28 - 10; // 1970 == 10 (mod 28)
+ }
+
+ int nCentury = year / 100,
+ nCenturyReal = yearReal / 100;
+
+ // need to adjust for the years divisble by 400 which are
+ // not leap but are counted like leap ones if we just take
+ // the number of centuries in between for nLostWeekDays
+ int nLostWeekDays = (nCentury - nCenturyReal) -
+ (nCentury / 4 - nCenturyReal / 4);
+
+ // we have to gain back the "lost" weekdays: note that the
+ // effect of this loop is to not do anything to
+ // nLostWeekDays (which we won't use any more), but to
+ // (indirectly) set the year correctly
+ while ( (nLostWeekDays % 7) != 0 )
+ {
+ nLostWeekDays += year++ % 4 ? 1 : 2;
+ }
+
+ // finally move the year below 2000 so that the 2-digit
+ // year number can never match the month or day of the
+ // month when we do the replacements below
+ if ( year >= 2000 )
+ year -= 28;
+
+ wxASSERT_MSG( year >= 1970 && year < 2000,
+ _T("logic error in wxDateTime::Format") );
+
+
+ // use strftime() to format the same date but in supported
+ // year
+ //
+ // NB: we assume that strftime() doesn't check for the
+ // date validity and will happily format the date
+ // corresponding to Feb 29 of a non leap year (which
+ // may happen if yearReal was leap and year is not)
+ struct tm tmAdjusted;
+ InitTm(tmAdjusted);
+ tmAdjusted.tm_hour = tm.hour;
+ tmAdjusted.tm_min = tm.min;
+ tmAdjusted.tm_sec = tm.sec;
+ tmAdjusted.tm_wday = tm.GetWeekDay();
+ tmAdjusted.tm_yday = GetDayOfYear();
+ tmAdjusted.tm_mday = tm.mday;
+ tmAdjusted.tm_mon = tm.mon;
+ tmAdjusted.tm_year = year - 1900;
+ tmAdjusted.tm_isdst = 0; // no DST, already adjusted
+ wxString str = CallStrftime(*p == _T('c') ? _T("%c")
+ : _T("%x"),
+ &tmAdjusted);
+
+ // now replace the replacement year with the real year:
+ // notice that we have to replace the 4 digit year with
+ // a unique string not appearing in strftime() output
+ // first to prevent the 2 digit year from matching any
+ // substring of the 4 digit year (but any day, month,
+ // hours or minutes components should be safe because
+ // they are never in 70-99 range)
+ wxString replacement("|");
+ while ( str.find(replacement) != wxString::npos )
+ replacement += '|';
+
+ str.Replace(wxString::Format("%d", year),
+ replacement);
+ str.Replace(wxString::Format("%d", year % 100),
+ wxString::Format("%d", yearReal % 100));
+ str.Replace(replacement,
+ wxString::Format("%d", yearReal));
+
+ res += str;
+ }
+#else // !HAVE_STRFTIME
+ // Use "%m/%d/%y %H:%M:%S" format instead
+ res += wxString::Format(wxT("%02d/%02d/%04d %02d:%02d:%02d"),
+ tm.mon+1,tm.mday, tm.year, tm.hour, tm.min, tm.sec);
+#endif // HAVE_STRFTIME/!HAVE_STRFTIME
+ break;
-// ============================================================================
-// wxTimeSpan
-// ============================================================================
+ case _T('d'): // day of a month (01-31)
+ res += wxString::Format(fmt, tm.mday);
+ break;
-// not all strftime(3) format specifiers make sense here because, for example,
-// a time span doesn't have a year nor a timezone
-//
-// Here are the ones which are supported (all of them are supported by strftime
-// as well):
-// %H hour in 24 hour format
-// %M minute (00 - 59)
-// %S second (00 - 59)
-// %% percent sign
-//
-// Also, for MFC CTimeSpan compatibility, we support
-// %D number of days
-//
-// And, to be better than MFC :-), we also have
-// %E number of wEeks
-// %l milliseconds (000 - 999)
-wxString wxTimeSpan::Format(const wxChar *format) const
-{
- wxCHECK_MSG( format, _T(""), _T("NULL format in wxTimeSpan::Format") );
+ case _T('H'): // hour in 24h format (00-23)
+ res += wxString::Format(fmt, tm.hour);
+ break;
- wxString str;
- str.Alloc(strlen(format));
+ case _T('I'): // hour in 12h format (01-12)
+ {
+ // 24h -> 12h, 0h -> 12h too
+ int hour12 = tm.hour > 12 ? tm.hour - 12
+ : tm.hour ? tm.hour : 12;
+ res += wxString::Format(fmt, hour12);
+ }
+ break;
- for ( const wxChar *pch = format; pch; pch++ )
- {
- wxChar ch = *pch;
+ case _T('j'): // day of the year
+ res += wxString::Format(fmt, GetDayOfYear(tz));
+ break;
- if ( ch == '%' )
- {
- wxString tmp;
+ case _T('l'): // milliseconds (NOT STANDARD)
+ res += wxString::Format(fmt, GetMillisecond(tz));
+ break;
- ch = *pch++;
- switch ( ch )
- {
- default:
- wxFAIL_MSG( _T("invalid format character") );
- // fall through
+ case _T('m'): // month as a number (01-12)
+ res += wxString::Format(fmt, tm.mon + 1);
+ break;
+
+ case _T('M'): // minute as a decimal number (00-59)
+ res += wxString::Format(fmt, tm.min);
+ break;
- case '%':
- // will get to str << ch below
+ case _T('p'): // AM or PM string
+#ifdef HAVE_STRFTIME
+ res += CallStrftime(_T("%p"), &tmTimeOnly);
+#else // !HAVE_STRFTIME
+ res += (tmTimeOnly.tm_hour > 12) ? wxT("pm") : wxT("am");
+#endif // HAVE_STRFTIME/!HAVE_STRFTIME
break;
- case 'D':
- tmp.Printf(_T("%d"), GetDays());
+ case _T('S'): // second as a decimal number (00-61)
+ res += wxString::Format(fmt, tm.sec);
break;
- case 'E':
- tmp.Printf(_T("%d"), GetWeeks());
+ case _T('U'): // week number in the year (Sunday 1st week day)
+ res += wxString::Format(fmt, GetWeekOfYear(Sunday_First, tz));
break;
- case 'H':
- tmp.Printf(_T("%02d"), GetHours());
+ case _T('W'): // week number in the year (Monday 1st week day)
+ res += wxString::Format(fmt, GetWeekOfYear(Monday_First, tz));
break;
- case 'l':
- tmp.Printf(_T("%03d"), GetMilliseconds());
+ case _T('w'): // weekday as a number (0-6), Sunday = 0
+ res += wxString::Format(fmt, tm.GetWeekDay());
break;
- case 'M':
- tmp.Printf(_T("%02d"), GetMinutes());
+ // case _T('x'): -- handled with "%c"
+
+ case _T('X'): // locale default time representation
+ // just use strftime() to format the time for us
+#ifdef HAVE_STRFTIME
+ res += CallStrftime(_T("%X"), &tmTimeOnly);
+#else // !HAVE_STRFTIME
+ res += wxString::Format(wxT("%02d:%02d:%02d"),tm.hour, tm.min, tm.sec);
+#endif // HAVE_STRFTIME/!HAVE_STRFTIME
break;
- case 'S':
- tmp.Printf(_T("%02d"), GetSeconds());
+ case _T('y'): // year without century (00-99)
+ res += wxString::Format(fmt, tm.year % 100);
break;
- }
- if ( !!tmp )
- {
- str += tmp;
+ case _T('Y'): // year with century
+ res += wxString::Format(fmt, tm.year);
+ break;
+
+ case _T('Z'): // timezone name
+#ifdef HAVE_STRFTIME
+ res += CallStrftime(_T("%Z"), &tmTimeOnly);
+#endif
+ break;
+
+ default:
+ // is it the format width?
+ fmt.Empty();
+ while ( *p == _T('-') || *p == _T('+') ||
+ *p == _T(' ') || wxIsdigit(*p) )
+ {
+ fmt += *p;
+ }
+
+ if ( !fmt.empty() )
+ {
+ // we've only got the flags and width so far in fmt
+ fmt.Prepend(_T('%'));
+ fmt.Append(_T('d'));
+
+ restart = true;
+
+ break;
+ }
+
+ // no, it wasn't the width
+ wxFAIL_MSG(_T("unknown format specificator"));
+
+ // fall through and just copy it nevertheless
+
+ case _T('%'): // a percent sign
+ res += *p;
+ break;
+
+ case 0: // the end of string
+ wxFAIL_MSG(_T("missing format at the end of string"));
- // skip str += ch below
- continue;
+ // just put the '%' which was the last char in format
+ res += _T('%');
+ break;
}
}
-
- str += ch;
}
- return str;
+ return res;
}
+
+// this function parses a string in (strict) RFC 822 format: see the section 5
+// of the RFC for the detailed description, but briefly it's something of the
+// form "Sat, 18 Dec 1999 00:48:30 +0100"
+//
+// this function is "strict" by design - it must reject anything except true
+// RFC822 time specs.
+//
+// TODO a great candidate for using reg exps
+const char *
+wxDateTime::ParseRfc822Date(const wxString& date, wxString::const_iterator *end)
+{
+ // TODO: rewrite using iterators instead of wxChar pointers
+ const wxStringCharType *p = date.wx_str();
+ const wxStringCharType *comma = wxStrchr(p, wxS(','));
+ if ( comma )
+ {
+ // the part before comma is the weekday
+
+ // skip it for now - we don't use but might check that it really
+ // corresponds to the specfied date
+ p = comma + 1;
+
+ if ( *p != _T(' ') )
+ {
+ wxLogDebug(_T("no space after weekday in RFC822 time spec"));
+
+ return NULL;
+ }
+
+ p++; // skip space
+ }
+
+ // the following 1 or 2 digits are the day number
+ if ( !wxIsdigit(*p) )
+ {
+ wxLogDebug(_T("day number expected in RFC822 time spec, none found"));
+
+ return NULL;
+ }
+
+ wxDateTime_t day = (wxDateTime_t)(*p++ - _T('0'));
+ if ( wxIsdigit(*p) )
+ {
+ day *= 10;
+ day = (wxDateTime_t)(day + (*p++ - _T('0')));
+ }
+
+ if ( *p++ != _T(' ') )
+ {
+ return NULL;
+ }
+
+ // the following 3 letters specify the month
+ wxString monName(p, 3);
+ Month mon;
+ if ( monName == _T("Jan") )
+ mon = Jan;
+ else if ( monName == _T("Feb") )
+ mon = Feb;
+ else if ( monName == _T("Mar") )
+ mon = Mar;
+ else if ( monName == _T("Apr") )
+ mon = Apr;
+ else if ( monName == _T("May") )
+ mon = May;
+ else if ( monName == _T("Jun") )
+ mon = Jun;
+ else if ( monName == _T("Jul") )
+ mon = Jul;
+ else if ( monName == _T("Aug") )
+ mon = Aug;
+ else if ( monName == _T("Sep") )
+ mon = Sep;
+ else if ( monName == _T("Oct") )
+ mon = Oct;
+ else if ( monName == _T("Nov") )
+ mon = Nov;
+ else if ( monName == _T("Dec") )
+ mon = Dec;
+ else
+ {
+ wxLogDebug(_T("Invalid RFC 822 month name '%s'"), monName.c_str());
+
+ return NULL;
+ }
+
+ p += 3;
+
+ if ( *p++ != _T(' ') )
+ {
+ return NULL;
+ }
+
+ // next is the year
+ if ( !wxIsdigit(*p) )
+ {
+ // no year?
+ return NULL;
+ }
+
+ int year = *p++ - _T('0');
+
+ if ( !wxIsdigit(*p) )
+ {
+ // should have at least 2 digits in the year
+ return NULL;
+ }
+
+ year *= 10;
+ year += *p++ - _T('0');
+
+ // is it a 2 digit year (as per original RFC 822) or a 4 digit one?
+ if ( wxIsdigit(*p) )
+ {
+ year *= 10;
+ year += *p++ - _T('0');
+
+ if ( !wxIsdigit(*p) )
+ {
+ // no 3 digit years please
+ return NULL;
+ }
+
+ year *= 10;
+ year += *p++ - _T('0');
+ }
+
+ if ( *p++ != _T(' ') )
+ {
+ return NULL;
+ }
+
+ // time is in the format hh:mm:ss and seconds are optional
+ if ( !wxIsdigit(*p) )
+ {
+ return NULL;
+ }
+
+ wxDateTime_t hour = (wxDateTime_t)(*p++ - _T('0'));
+
+ if ( !wxIsdigit(*p) )
+ {
+ return NULL;
+ }
+
+ hour *= 10;
+ hour = (wxDateTime_t)(hour + (*p++ - _T('0')));
+
+ if ( *p++ != _T(':') )
+ {
+ return NULL;
+ }
+
+ if ( !wxIsdigit(*p) )
+ {
+ return NULL;
+ }
+
+ wxDateTime_t min = (wxDateTime_t)(*p++ - _T('0'));
+
+ if ( !wxIsdigit(*p) )
+ {
+ return NULL;
+ }
+
+ min *= 10;
+ min = (wxDateTime_t)(min + *p++ - _T('0'));
+
+ wxDateTime_t sec = 0;
+ if ( *p == _T(':') )
+ {
+ p++;
+ if ( !wxIsdigit(*p) )
+ {
+ return NULL;
+ }
+
+ sec = (wxDateTime_t)(*p++ - _T('0'));
+
+ if ( !wxIsdigit(*p) )
+ {
+ return NULL;
+ }
+
+ sec *= 10;
+ sec = (wxDateTime_t)(sec + *p++ - _T('0'));
+ }
+
+ if ( *p++ != _T(' ') )
+ {
+ return NULL;
+ }
+
+ // and now the interesting part: the timezone
+ int offset wxDUMMY_INITIALIZE(0);
+ if ( *p == _T('-') || *p == _T('+') )
+ {
+ // the explicit offset given: it has the form of hhmm
+ bool plus = *p++ == _T('+');
+
+ if ( !wxIsdigit(*p) || !wxIsdigit(*(p + 1)) )
+ {
+ return NULL;
+ }
+
+ // hours
+ offset = MIN_PER_HOUR*(10*(*p - _T('0')) + (*(p + 1) - _T('0')));
+
+ p += 2;
+
+ if ( !wxIsdigit(*p) || !wxIsdigit(*(p + 1)) )
+ {
+ return NULL;
+ }
+
+ // minutes
+ offset += 10*(*p - _T('0')) + (*(p + 1) - _T('0'));
+
+ if ( !plus )
+ {
+ offset = -offset;
+ }
+
+ p += 2;
+ }
+ else
+ {
+ // the symbolic timezone given: may be either military timezone or one
+ // of standard abbreviations
+ if ( !*(p + 1) )
+ {
+ // military: Z = UTC, J unused, A = -1, ..., Y = +12
+ static const int offsets[26] =
+ {
+ //A B C D E F G H I J K L M
+ -1, -2, -3, -4, -5, -6, -7, -8, -9, 0, -10, -11, -12,
+ //N O P R Q S T U V W Z Y Z
+ +1, +2, +3, +4, +5, +6, +7, +8, +9, +10, +11, +12, 0
+ };
+
+ if ( *p < _T('A') || *p > _T('Z') || *p == _T('J') )
+ {
+ wxLogDebug(_T("Invalid militaty timezone '%c'"), *p);
+
+ return NULL;
+ }
+
+ offset = offsets[*p++ - _T('A')];
+ }
+ else
+ {
+ // abbreviation
+ wxString tz = p;
+ if ( tz == _T("UT") || tz == _T("UTC") || tz == _T("GMT") )
+ offset = 0;
+ else if ( tz == _T("AST") )
+ offset = AST - GMT0;
+ else if ( tz == _T("ADT") )
+ offset = ADT - GMT0;
+ else if ( tz == _T("EST") )
+ offset = EST - GMT0;
+ else if ( tz == _T("EDT") )
+ offset = EDT - GMT0;
+ else if ( tz == _T("CST") )
+ offset = CST - GMT0;
+ else if ( tz == _T("CDT") )
+ offset = CDT - GMT0;
+ else if ( tz == _T("MST") )
+ offset = MST - GMT0;
+ else if ( tz == _T("MDT") )
+ offset = MDT - GMT0;
+ else if ( tz == _T("PST") )
+ offset = PST - GMT0;
+ else if ( tz == _T("PDT") )
+ offset = PDT - GMT0;
+ else
+ {
+ wxLogDebug(_T("Unknown RFC 822 timezone '%s'"), p);
+
+ return NULL;
+ }
+
+ p += tz.length();
+ }
+
+ // make it minutes
+ offset *= MIN_PER_HOUR;
+ }
+
+ // the spec was correct, construct the date from the values we found
+ Set(day, mon, year, hour, min, sec);
+ MakeFromTimezone(TimeZone::Make(offset*SEC_PER_MIN));
+
+ const size_t endpos = p - date.wx_str();
+ if ( end )
+ *end = date.begin() + endpos;
+
+ return date.c_str() + endpos;
+}
+
+#ifdef __WINDOWS__
+
+// returns the string containing strftime() format used for short dates in the
+// current locale or an empty string
+static wxString GetLocaleDateFormat()
+{
+ wxString fmtWX;
+
+ // there is no setlocale() under Windows CE, so just always query the
+ // system there
+#ifndef __WXWINCE__
+ if ( strcmp(setlocale(LC_ALL, NULL), "C") != 0 )
+#endif
+ {
+ // The locale was programatically set to non-C. We assume that this was
+ // done using wxLocale, in which case thread's current locale is also
+ // set to correct LCID value and we can use GetLocaleInfo to determine
+ // the correct formatting string:
+#ifdef __WXWINCE__
+ LCID lcid = LOCALE_USER_DEFAULT;
+#else
+ LCID lcid = GetThreadLocale();
+#endif
+ // according to MSDN 80 chars is max allowed for short date format
+ wxChar fmt[81];
+ if ( ::GetLocaleInfo(lcid, LOCALE_SSHORTDATE, fmt, WXSIZEOF(fmt)) )
+ {
+ wxChar chLast = _T('\0');
+ size_t lastCount = 0;
+ for ( const wxChar *p = fmt; /* NUL handled inside */; p++ )
+ {
+ if ( *p == chLast )
+ {
+ lastCount++;
+ continue;
+ }
+
+ switch ( *p )
+ {
+ // these characters come in groups, start counting them
+ case _T('d'):
+ case _T('M'):
+ case _T('y'):
+ case _T('g'):
+ chLast = *p;
+ lastCount = 1;
+ break;
+
+ default:
+ // first deal with any special characters we have had
+ if ( lastCount )
+ {
+ switch ( chLast )
+ {
+ case _T('d'):
+ switch ( lastCount )
+ {
+ case 1: // d
+ case 2: // dd
+ // these two are the same as we
+ // don't distinguish between 1 and
+ // 2 digits for days
+ fmtWX += _T("%d");
+ break;
+
+ case 3: // ddd
+ fmtWX += _T("%a");
+ break;
+
+ case 4: // dddd
+ fmtWX += _T("%A");
+ break;
+
+ default:
+ wxFAIL_MSG( _T("too many 'd's") );
+ }
+ break;
+
+ case _T('M'):
+ switch ( lastCount )
+ {
+ case 1: // M
+ case 2: // MM
+ // as for 'd' and 'dd' above
+ fmtWX += _T("%m");
+ break;
+
+ case 3:
+ fmtWX += _T("%b");
+ break;
+
+ case 4:
+ fmtWX += _T("%B");
+ break;
+
+ default:
+ wxFAIL_MSG( _T("too many 'M's") );
+ }
+ break;
+
+ case _T('y'):
+ switch ( lastCount )
+ {
+ case 1: // y
+ case 2: // yy
+ fmtWX += _T("%y");
+ break;
+
+ case 4: // yyyy
+ fmtWX += _T("%Y");
+ break;
+
+ default:
+ wxFAIL_MSG( _T("wrong number of 'y's") );
+ }
+ break;
+
+ case _T('g'):
+ // strftime() doesn't have era string,
+ // ignore this format
+ wxASSERT_MSG( lastCount <= 2,
+ _T("too many 'g's") );
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unreachable") );
+ }
+
+ chLast = _T('\0');
+ lastCount = 0;
+ }
+
+ // not a special character so must be just a separator,
+ // treat as is
+ if ( *p != _T('\0') )
+ {
+ if ( *p == _T('%') )
+ {
+ // this one needs to be escaped
+ fmtWX += _T('%');
+ }
+
+ fmtWX += *p;
+ }
+ }
+
+ if ( *p == _T('\0') )
+ break;
+ }
+ }
+ //else: GetLocaleInfo() failed, leave fmtDate value unchanged and
+ // try our luck with the default formats
+ }
+ //else: default C locale, default formats should work
+
+ return fmtWX;
+}
+
+#endif // __WINDOWS__
+
+const char *
+wxDateTime::ParseFormat(const wxString& date,
+ const wxString& format,
+ const wxDateTime& dateDef,
+ wxString::const_iterator *end)
+{
+ wxCHECK_MSG( !format.empty(), NULL, "format can't be empty" );
+
+ wxString str;
+ unsigned long num;
+
+ // what fields have we found?
+ bool haveWDay = false,
+ haveYDay = false,
+ haveDay = false,
+ haveMon = false,
+ haveYear = false,
+ haveHour = false,
+ haveMin = false,
+ haveSec = false;
+
+ bool hourIsIn12hFormat = false, // or in 24h one?
+ isPM = false; // AM by default
+
+ // and the value of the items we have (init them to get rid of warnings)
+ wxDateTime_t sec = 0,
+ min = 0,
+ hour = 0;
+ WeekDay wday = Inv_WeekDay;
+ wxDateTime_t yday = 0,
+ mday = 0;
+ wxDateTime::Month mon = Inv_Month;
+ int year = 0;
+
+ const wxStringCharType *input = date.wx_str();
+ for ( wxString::const_iterator fmt = format.begin(); fmt != format.end(); ++fmt )
+ {
+ if ( *fmt != _T('%') )
+ {
+ if ( wxIsspace(*fmt) )
+ {
+ // a white space in the format string matches 0 or more white
+ // spaces in the input
+ while ( wxIsspace(*input) )
+ {
+ input++;
+ }
+ }
+ else // !space
+ {
+ // any other character (not whitespace, not '%') must be
+ // matched by itself in the input
+ if ( *input++ != *fmt )
+ {
+ // no match
+ return NULL;
+ }
+ }
+
+ // done with this format char
+ continue;
+ }
+
+ // start of a format specification
+
+ // parse the optional width
+ size_t width = 0;
+ while ( wxIsdigit(*++fmt) )
+ {
+ width *= 10;
+ width += *fmt - _T('0');
+ }
+
+ // the default widths for the various fields
+ if ( !width )
+ {
+ switch ( (*fmt).GetValue() )
+ {
+ case _T('Y'): // year has 4 digits
+ width = 4;
+ break;
+
+ case _T('j'): // day of year has 3 digits
+ case _T('l'): // milliseconds have 3 digits
+ width = 3;
+ break;
+
+ case _T('w'): // week day as number has only one
+ width = 1;
+ break;
+
+ default:
+ // default for all other fields
+ width = 2;
+ }
+ }
+
+ // then the format itself
+ switch ( (*fmt).GetValue() )
+ {
+ case _T('a'): // a weekday name
+ case _T('A'):
+ {
+ int flag = *fmt == _T('a') ? Name_Abbr : Name_Full;
+ wday = GetWeekDayFromName(GetAlphaToken(input), flag);
+ if ( wday == Inv_WeekDay )
+ {
+ // no match
+ return NULL;
+ }
+ }
+ haveWDay = true;
+ break;
+
+ case _T('b'): // a month name
+ case _T('B'):
+ {
+ int flag = *fmt == _T('b') ? Name_Abbr : Name_Full;
+ mon = GetMonthFromName(GetAlphaToken(input), flag);
+ if ( mon == Inv_Month )
+ {
+ // no match
+ return NULL;
+ }
+ }
+ haveMon = true;
+ break;
+
+ case _T('c'): // locale default date and time representation
+ {
+ wxDateTime dt;
+
+ const wxString inc(input);
+
+ // try the format which corresponds to ctime() output first
+ wxString::const_iterator endc;
+ if ( !dt.ParseFormat(inc, wxS("%a %b %d %H:%M:%S %Y"), &endc) &&
+ !dt.ParseFormat(inc, wxS("%x %X"), &endc) &&
+ !dt.ParseFormat(inc, wxS("%X %x"), &endc) )
+ {
+ // we've tried everything and still no match
+ return NULL;
+ }
+
+ Tm tm = dt.GetTm();
+
+ haveDay = haveMon = haveYear =
+ haveHour = haveMin = haveSec = true;
+
+ hour = tm.hour;
+ min = tm.min;
+ sec = tm.sec;
+
+ year = tm.year;
+ mon = tm.mon;
+ mday = tm.mday;
+
+ input += endc - inc.begin();
+ }
+ break;
+
+ case _T('d'): // day of a month (01-31)
+ if ( !GetNumericToken(width, input, &num) ||
+ (num > 31) || (num < 1) )
+ {
+ // no match
+ return NULL;
+ }
+
+ // we can't check whether the day range is correct yet, will
+ // do it later - assume ok for now
+ haveDay = true;
+ mday = (wxDateTime_t)num;
+ break;
+
+ case _T('H'): // hour in 24h format (00-23)
+ if ( !GetNumericToken(width, input, &num) || (num > 23) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveHour = true;
+ hour = (wxDateTime_t)num;
+ break;
+
+ case _T('I'): // hour in 12h format (01-12)
+ if ( !GetNumericToken(width, input, &num) || !num || (num > 12) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveHour = true;
+ hourIsIn12hFormat = true;
+ hour = (wxDateTime_t)(num % 12); // 12 should be 0
+ break;
+
+ case _T('j'): // day of the year
+ if ( !GetNumericToken(width, input, &num) || !num || (num > 366) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveYDay = true;
+ yday = (wxDateTime_t)num;
+ break;
+
+ case _T('m'): // month as a number (01-12)
+ if ( !GetNumericToken(width, input, &num) || !num || (num > 12) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveMon = true;
+ mon = (Month)(num - 1);
+ break;
+
+ case _T('M'): // minute as a decimal number (00-59)
+ if ( !GetNumericToken(width, input, &num) || (num > 59) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveMin = true;
+ min = (wxDateTime_t)num;
+ break;
+
+ case _T('p'): // AM or PM string
+ {
+ wxString am, pm, token = GetAlphaToken(input);
+
+ GetAmPmStrings(&am, &pm);
+ if (am.empty() && pm.empty())
+ return NULL; // no am/pm strings defined
+ if ( token.CmpNoCase(pm) == 0 )
+ {
+ isPM = true;
+ }
+ else if ( token.CmpNoCase(am) != 0 )
+ {
+ // no match
+ return NULL;
+ }
+ }
+ break;
+
+ case _T('r'): // time as %I:%M:%S %p
+ {
+ wxDateTime dt;
+ input = dt.ParseFormat(input, wxS("%I:%M:%S %p"));
+ if ( !input )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveHour = haveMin = haveSec = true;
+
+ Tm tm = dt.GetTm();
+ hour = tm.hour;
+ min = tm.min;
+ sec = tm.sec;
+ }
+ break;
+
+ case _T('R'): // time as %H:%M
+ {
+ wxDateTime dt;
+ input = dt.ParseFormat(input, wxS("%H:%M"));
+ if ( !input )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveHour = haveMin = true;
+
+ Tm tm = dt.GetTm();
+ hour = tm.hour;
+ min = tm.min;
+ }
+ break;
+
+ case _T('S'): // second as a decimal number (00-61)
+ if ( !GetNumericToken(width, input, &num) || (num > 61) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveSec = true;
+ sec = (wxDateTime_t)num;
+ break;
+
+ case _T('T'): // time as %H:%M:%S
+ {
+ wxDateTime dt;
+ input = dt.ParseFormat(input, _T("%H:%M:%S"));
+ if ( !input )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveHour = haveMin = haveSec = true;
+
+ Tm tm = dt.GetTm();
+ hour = tm.hour;
+ min = tm.min;
+ sec = tm.sec;
+ }
+ break;
+
+ case _T('w'): // weekday as a number (0-6), Sunday = 0
+ if ( !GetNumericToken(width, input, &num) || (wday > 6) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveWDay = true;
+ wday = (WeekDay)num;
+ break;
+
+ case _T('x'): // locale default date representation
+#ifdef HAVE_STRPTIME
+ // try using strptime() -- it may fail even if the input is
+ // correct but the date is out of range, so we will fall back
+ // to our generic code anyhow
+ {
+ struct tm tm;
+
+ const wxStringCharType *
+ result = CallStrptime(input, "%x", &tm);
+ if ( result )
+ {
+ input = result;
+
+ haveDay = haveMon = haveYear = true;
+
+ year = 1900 + tm.tm_year;
+ mon = (Month)tm.tm_mon;
+ mday = tm.tm_mday;
+
+ break;
+ }
+ }
+#endif // HAVE_STRPTIME
+
+ {
+ wxDateTime dt;
+ wxString fmtDate,
+ fmtDateAlt;
+
+#ifdef __WINDOWS__
+ // The above doesn't work for all locales, try to query
+ // Windows for the right way of formatting the date:
+ fmtDate = GetLocaleDateFormat();
+ if ( fmtDate.empty() )
+#endif // __WINDOWS__
+ {
+ if ( IsWestEuropeanCountry(GetCountry()) ||
+ GetCountry() == Russia )
+ {
+ fmtDate = _T("%d/%m/%y");
+ fmtDateAlt = _T("%m/%d/%y");
+ }
+ else // assume USA
+ {
+ fmtDate = _T("%m/%d/%y");
+ fmtDateAlt = _T("%d/%m/%y");
+ }
+ }
+
+ const wxString indate(input);
+ wxString::const_iterator endDate;
+ if ( !dt.ParseFormat(indate, fmtDate, &endDate) )
+ {
+ // try another one if we have it
+ if ( fmtDateAlt.empty() ||
+ !dt.ParseFormat(indate, fmtDateAlt, &endDate) )
+ {
+ return NULL;
+ }
+ }
+
+ Tm tm = dt.GetTm();
+
+ haveDay =
+ haveMon =
+ haveYear = true;
+
+ year = tm.year;
+ mon = tm.mon;
+ mday = tm.mday;
+
+ input += endDate - indate.begin();
+ }
+
+ break;
+
+ case _T('X'): // locale default time representation
+#ifdef HAVE_STRPTIME
+ {
+ // use strptime() to do it for us (FIXME !Unicode friendly)
+ struct tm tm;
+ input = CallStrptime(input, "%X", &tm);
+ if ( !input )
+ {
+ return NULL;
+ }
+
+ haveHour = haveMin = haveSec = true;
+
+ hour = tm.tm_hour;
+ min = tm.tm_min;
+ sec = tm.tm_sec;
+ }
+#else // !HAVE_STRPTIME
+ // TODO under Win32 we can query the LOCALE_ITIME system
+ // setting which says whether the default time format is
+ // 24 or 12 hour
+ {
+ // try to parse what follows as "%H:%M:%S" and, if this
+ // fails, as "%I:%M:%S %p" - this should catch the most
+ // common cases
+ wxDateTime dt;
+
+ const wxStringCharType *
+ result = dt.ParseFormat(input, wxS("%T"));
+ if ( !result )
+ {
+ result = dt.ParseFormat(input, wxS("%r"));
+ }
+
+ if ( !result )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveHour =
+ haveMin =
+ haveSec = true;
+
+ Tm tm = dt.GetTm();
+ hour = tm.hour;
+ min = tm.min;
+ sec = tm.sec;
+
+ input = result;
+ }
+#endif // HAVE_STRPTIME/!HAVE_STRPTIME
+ break;
+
+ case _T('y'): // year without century (00-99)
+ if ( !GetNumericToken(width, input, &num) || (num > 99) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveYear = true;
+
+ // TODO should have an option for roll over date instead of
+ // hard coding it here
+ year = (num > 30 ? 1900 : 2000) + (wxDateTime_t)num;
+ break;
+
+ case _T('Y'): // year with century
+ if ( !GetNumericToken(width, input, &num) )
+ {
+ // no match
+ return NULL;
+ }
+
+ haveYear = true;
+ year = (wxDateTime_t)num;
+ break;
+
+ case _T('Z'): // timezone name
+ wxFAIL_MSG(_T("TODO"));
+ break;
+
+ case _T('%'): // a percent sign
+ if ( *input++ != _T('%') )
+ {
+ // no match
+ return NULL;
+ }
+ break;
+
+ case 0: // the end of string
+ wxFAIL_MSG(_T("unexpected format end"));
+
+ // fall through
+
+ default: // not a known format spec
+ return NULL;
+ }
+ }
+
+ // format matched, try to construct a date from what we have now
+ Tm tmDef;
+ if ( dateDef.IsValid() )
+ {
+ // take this date as default
+ tmDef = dateDef.GetTm();
+ }
+ else if ( IsValid() )
+ {
+ // if this date is valid, don't change it
+ tmDef = GetTm();
+ }
+ else
+ {
+ // no default and this date is invalid - fall back to Today()
+ tmDef = Today().GetTm();
+ }
+
+ Tm tm = tmDef;
+
+ // set the date
+ if ( haveMon )
+ {
+ tm.mon = mon;
+ }
+
+ if ( haveYear )
+ {
+ tm.year = year;
+ }
+
+ // TODO we don't check here that the values are consistent, if both year
+ // day and month/day were found, we just ignore the year day and we
+ // also always ignore the week day
+ if ( haveDay )
+ {
+ if ( mday > GetNumOfDaysInMonth(tm.year, tm.mon) )
+ {
+ wxLogDebug(_T("bad month day in wxDateTime::ParseFormat"));
+
+ return NULL;
+ }
+
+ tm.mday = mday;
+ }
+ else if ( haveYDay )
+ {
+ if ( yday > GetNumberOfDays(tm.year) )
+ {
+ wxLogDebug(_T("bad year day in wxDateTime::ParseFormat"));
+
+ return NULL;
+ }
+
+ Tm tm2 = wxDateTime(1, Jan, tm.year).SetToYearDay(yday).GetTm();
+
+ tm.mon = tm2.mon;
+ tm.mday = tm2.mday;
+ }
+
+ // deal with AM/PM
+ if ( haveHour && hourIsIn12hFormat && isPM )
+ {
+ // translate to 24hour format
+ hour += 12;
+ }
+ //else: either already in 24h format or no translation needed
+
+ // set the time
+ if ( haveHour )
+ {
+ tm.hour = hour;
+ }
+
+ if ( haveMin )
+ {
+ tm.min = min;
+ }
+
+ if ( haveSec )
+ {
+ tm.sec = sec;
+ }
+
+ Set(tm);
+
+ // finally check that the week day is consistent -- if we had it
+ if ( haveWDay && GetWeekDay() != wday )
+ {
+ wxLogDebug(_T("inconsistsnet week day in wxDateTime::ParseFormat()"));
+
+ return NULL;
+ }
+
+ const size_t endpos = input - date.wx_str();
+ if ( end )
+ *end = date.begin() + endpos;
+
+ return date.c_str() + endpos;
+}
+
+const char *
+wxDateTime::ParseDateTime(const wxString& date, wxString::const_iterator *end)
+{
+ // Set to current day and hour, so strings like '14:00' becomes today at
+ // 14, not some other random date
+ wxDateTime dtDate = wxDateTime::Today();
+ wxDateTime dtTime = wxDateTime::Today();
+
+ wxString::const_iterator
+ endTime,
+ endDate,
+ endBoth;
+
+ // If we got a date in the beginning, see if there is a time specified
+ // after the date
+ if ( dtDate.ParseDate(date, &endDate) )
+ {
+ // Skip spaces, as the ParseTime() function fails on spaces
+ while ( endDate != date.end() && wxIsspace(*endDate) )
+ ++endDate;
+
+ const wxString timestr(endDate, date.end());
+ if ( !dtTime.ParseTime(timestr, &endTime) )
+ return NULL;
+
+ endBoth = endDate + (endTime - timestr.begin());
+ }
+ else // no date in the beginning
+ {
+ // check if we have a time followed by a date
+ if ( !dtTime.ParseTime(date, &endTime) )
+ return NULL;
+
+ while ( endTime != date.end() && wxIsspace(*endTime) )
+ ++endTime;
+
+ const wxString datestr(endTime, date.end());
+ if ( !dtDate.ParseDate(datestr, &endDate) )
+ return NULL;
+
+ endBoth = endTime + (endDate - datestr.begin());
+ }
+
+ Set(dtDate.GetDay(), dtDate.GetMonth(), dtDate.GetYear(),
+ dtTime.GetHour(), dtTime.GetMinute(), dtTime.GetSecond(),
+ dtTime.GetMillisecond());
+
+ // Return endpoint of scan
+ if ( end )
+ *end = endBoth;
+
+ return date.c_str() + (endBoth - date.begin());
+}
+
+const char *
+wxDateTime::ParseDate(const wxString& date, wxString::const_iterator *end)
+{
+ // this is a simplified version of ParseDateTime() which understands only
+ // "today" (for wxDate compatibility) and digits only otherwise (and not
+ // all esoteric constructions ParseDateTime() knows about)
+
+ const wxStringCharType *p = date.wx_str();
+ while ( wxIsspace(*p) )
+ p++;
+
+ // some special cases
+ static struct
+ {
+ const char *str;
+ int dayDiffFromToday;
+ } literalDates[] =
+ {
+ { wxTRANSLATE("today"), 0 },
+ { wxTRANSLATE("yesterday"), -1 },
+ { wxTRANSLATE("tomorrow"), 1 },
+ };
+
+ for ( size_t n = 0; n < WXSIZEOF(literalDates); n++ )
+ {
+ const wxString dateStr = wxGetTranslation(literalDates[n].str);
+ size_t len = dateStr.length();
+ if ( wxStrlen(p) >= len )
+ {
+ wxString str(p, len);
+ if ( str.CmpNoCase(dateStr) == 0 )
+ {
+ // nothing can follow this, so stop here
+ p += len;
+
+ int dayDiffFromToday = literalDates[n].dayDiffFromToday;
+ *this = Today();
+ if ( dayDiffFromToday )
+ {
+ *this += wxDateSpan::Days(dayDiffFromToday);
+ }
+
+ const size_t endpos = p - date.wx_str();
+
+ if ( end )
+ *end = date.begin() + endpos;
+ return date.c_str() + endpos;
+ }
+ }
+ }
+
+ // We try to guess what we have here: for each new (numeric) token, we
+ // determine if it can be a month, day or a year. Of course, there is an
+ // ambiguity as some numbers may be days as well as months, so we also
+ // have the ability to back track.
+
+ // what do we have?
+ bool haveDay = false, // the months day?
+ haveWDay = false, // the day of week?
+ haveMon = false, // the month?
+ haveYear = false; // the year?
+
+ // and the value of the items we have (init them to get rid of warnings)
+ WeekDay wday = Inv_WeekDay;
+ wxDateTime_t day = 0;
+ wxDateTime::Month mon = Inv_Month;
+ int year = 0;
+
+ // tokenize the string
+ size_t nPosCur = 0;
+ static const wxStringCharType *dateDelimiters = wxS(".,/-\t\r\n ");
+ wxStringTokenizer tok(p, dateDelimiters);
+ while ( tok.HasMoreTokens() )
+ {
+ wxString token = tok.GetNextToken();
+ if ( !token )
+ continue;
+
+ // is it a number?
+ unsigned long val;
+ if ( token.ToULong(&val) )
+ {
+ // guess what this number is
+
+ bool isDay = false,
+ isMonth = false,
+ isYear = false;
+
+ if ( !haveMon && val > 0 && val <= 12 )
+ {
+ // assume it is month
+ isMonth = true;
+ }
+ else // not the month
+ {
+ if ( haveDay )
+ {
+ // this can only be the year
+ isYear = true;
+ }
+ else // may be either day or year
+ {
+ // use a leap year if we don't have the year yet to allow
+ // dates like 2/29/1976 which would be rejected otherwise
+ wxDateTime_t max_days = (wxDateTime_t)(
+ haveMon
+ ? GetNumOfDaysInMonth(haveYear ? year : 1976, mon)
+ : 31
+ );
+
+ // can it be day?
+ if ( (val == 0) || (val > (unsigned long)max_days) )
+ {
+ // no
+ isYear = true;
+ }
+ else // yes, suppose it's the day
+ {
+ isDay = true;
+ }
+ }
+ }
+
+ if ( isYear )
+ {
+ if ( haveYear )
+ break;
+
+ haveYear = true;
+
+ year = (wxDateTime_t)val;
+ }
+ else if ( isDay )
+ {
+ if ( haveDay )
+ break;
+
+ haveDay = true;
+
+ day = (wxDateTime_t)val;
+ }
+ else if ( isMonth )
+ {
+ haveMon = true;
+
+ mon = (Month)(val - 1);
+ }
+ }
+ else // not a number
+ {
+ // be careful not to overwrite the current mon value
+ Month mon2 = GetMonthFromName(token, Name_Full | Name_Abbr);
+ if ( mon2 != Inv_Month )
+ {
+ // it's a month
+ if ( haveMon )
+ {
+ // but we already have a month - maybe we guessed wrong?
+ if ( !haveDay )
+ {
+ // no need to check in month range as always < 12, but
+ // the days are counted from 1 unlike the months
+ day = (wxDateTime_t)(mon + 1);
+ haveDay = true;
+ }
+ else
+ {
+ // could possible be the year (doesn't the year come
+ // before the month in the japanese format?) (FIXME)
+ break;
+ }
+ }
+
+ mon = mon2;
+
+ haveMon = true;
+ }
+ else // not a valid month name
+ {
+ WeekDay wday2 = GetWeekDayFromName(token, Name_Full | Name_Abbr);
+ if ( wday2 != Inv_WeekDay )
+ {
+ // a week day
+ if ( haveWDay )
+ {
+ break;
+ }
+
+ wday = wday2;
+
+ haveWDay = true;
+ }
+ else // not a valid weekday name
+ {
+ // try the ordinals
+ static const char *ordinals[] =
+ {
+ wxTRANSLATE("first"),
+ wxTRANSLATE("second"),
+ wxTRANSLATE("third"),
+ wxTRANSLATE("fourth"),
+ wxTRANSLATE("fifth"),
+ wxTRANSLATE("sixth"),
+ wxTRANSLATE("seventh"),
+ wxTRANSLATE("eighth"),
+ wxTRANSLATE("ninth"),
+ wxTRANSLATE("tenth"),
+ wxTRANSLATE("eleventh"),
+ wxTRANSLATE("twelfth"),
+ wxTRANSLATE("thirteenth"),
+ wxTRANSLATE("fourteenth"),
+ wxTRANSLATE("fifteenth"),
+ wxTRANSLATE("sixteenth"),
+ wxTRANSLATE("seventeenth"),
+ wxTRANSLATE("eighteenth"),
+ wxTRANSLATE("nineteenth"),
+ wxTRANSLATE("twentieth"),
+ // that's enough - otherwise we'd have problems with
+ // composite (or not) ordinals
+ };
+
+ size_t n;
+ for ( n = 0; n < WXSIZEOF(ordinals); n++ )
+ {
+ if ( token.CmpNoCase(ordinals[n]) == 0 )
+ {
+ break;
+ }
+ }
+
+ if ( n == WXSIZEOF(ordinals) )
+ {
+ // stop here - something unknown
+ break;
+ }
+
+ // it's a day
+ if ( haveDay )
+ {
+ // don't try anything here (as in case of numeric day
+ // above) - the symbolic day spec should always
+ // precede the month/year
+ break;
+ }
+
+ haveDay = true;
+
+ day = (wxDateTime_t)(n + 1);
+ }
+ }
+ }
+
+ nPosCur = tok.GetPosition();
+ }
+
+ // either no more tokens or the scan was stopped by something we couldn't
+ // parse - in any case, see if we can construct a date from what we have
+ if ( !haveDay && !haveWDay )
+ {
+ wxLogDebug(_T("ParseDate: no day, no weekday hence no date."));
+
+ return NULL;
+ }
+
+ if ( haveWDay && (haveMon || haveYear || haveDay) &&
+ !(haveDay && haveMon && haveYear) )
+ {
+ // without adjectives (which we don't support here) the week day only
+ // makes sense completely separately or with the full date
+ // specification (what would "Wed 1999" mean?)
+ return NULL;
+ }
+
+ if ( !haveWDay && haveYear && !(haveDay && haveMon) )
+ {
+ // may be we have month and day instead of day and year?
+ if ( haveDay && !haveMon )
+ {
+ if ( day <= 12 )
+ {
+ // exchange day and month
+ mon = (wxDateTime::Month)(day - 1);
+
+ // we're in the current year then
+ if ( (year > 0) && (year <= (int)GetNumOfDaysInMonth(Inv_Year, mon)) )
+ {
+ day = (wxDateTime_t)year;
+
+ haveMon = true;
+ haveYear = false;
+ }
+ //else: no, can't exchange, leave haveMon == false
+ }
+ }
+
+ if ( !haveMon )
+ {
+ // if we give the year, month and day must be given too
+ wxLogDebug(_T("ParseDate: day and month should be specified if year is."));
+
+ return NULL;
+ }
+ }
+
+ if ( !haveMon )
+ {
+ mon = GetCurrentMonth();
+ }
+
+ if ( !haveYear )
+ {
+ year = GetCurrentYear();
+ }
+
+ if ( haveDay )
+ {
+ // normally we check the day above but the check is optimistic in case
+ // we find the day before its month/year so we have to redo it now
+ if ( day > GetNumOfDaysInMonth(year, mon) )
+ return NULL;
+
+ Set(day, mon, year);
+
+ if ( haveWDay )
+ {
+ // check that it is really the same
+ if ( GetWeekDay() != wday )
+ {
+ // inconsistency detected
+ wxLogDebug(_T("ParseDate: inconsistent day/weekday."));
+
+ return NULL;
+ }
+ }
+ }
+ else // haveWDay
+ {
+ *this = Today();
+
+ SetToWeekDayInSameWeek(wday);
+ }
+
+ // return the pointer to the first unparsed char
+ p += nPosCur;
+ if ( nPosCur && wxStrchr(dateDelimiters, *(p - 1)) )
+ {
+ // if we couldn't parse the token after the delimiter, put back the
+ // delimiter as well
+ p--;
+ }
+
+ const size_t endpos = p - date.wx_str();
+ if ( end )
+ *end = date.begin() + endpos;
+
+ return date.c_str() + endpos;
+}
+
+const char *
+wxDateTime::ParseTime(const wxString& time, wxString::const_iterator *end)
+{
+ // first try some extra things
+ static const struct
+ {
+ const char *name;
+ wxDateTime_t hour;
+ } stdTimes[] =
+ {
+ { wxTRANSLATE("noon"), 12 },
+ { wxTRANSLATE("midnight"), 00 },
+ // anything else?
+ };
+
+ for ( size_t n = 0; n < WXSIZEOF(stdTimes); n++ )
+ {
+ wxString timeString = wxGetTranslation(stdTimes[n].name);
+ size_t len = timeString.length();
+ if ( timeString.CmpNoCase(wxString(time, len)) == 0 )
+ {
+ // casts required by DigitalMars
+ Set(stdTimes[n].hour, wxDateTime_t(0), wxDateTime_t(0));
+
+ if ( end )
+ *end = time.begin() + len;
+
+ return time.c_str() + len;
+ }
+ }
+
+ // try all time formats we may think about in the order from longest to
+ // shortest
+ static const char *timeFormats[] =
+ {
+ "%I:%M:%S %p", // 12hour with AM/PM
+ "%H:%M:%S", // could be the same or 24 hour one so try it too
+ "%I:%M %p", // 12hour with AM/PM but without seconds
+ "%H:%M:%S", // and a possibly 24 hour version without seconds
+ "%X", // possibly something from above or maybe something
+ // completely different -- try it last
+
+ // TODO: parse timezones
+ };
+
+ for ( size_t nFmt = 0; nFmt < WXSIZEOF(timeFormats); nFmt++ )
+ {
+ const char *result = ParseFormat(time, timeFormats[nFmt], end);
+ if ( result )
+ return result;
+ }
+
+ return NULL;
+}
+
+// ----------------------------------------------------------------------------
+// Workdays and holidays support
+// ----------------------------------------------------------------------------
+
+bool wxDateTime::IsWorkDay(Country WXUNUSED(country)) const
+{
+ return !wxDateTimeHolidayAuthority::IsHoliday(*this);
+}
+
+// ============================================================================
+// wxDateSpan
+// ============================================================================
+
+wxDateSpan WXDLLIMPEXP_BASE operator*(int n, const wxDateSpan& ds)
+{
+ wxDateSpan ds1(ds);
+ return ds1.Multiply(n);
+}
+
+// ============================================================================
+// wxTimeSpan
+// ============================================================================
+
+wxTimeSpan WXDLLIMPEXP_BASE operator*(int n, const wxTimeSpan& ts)
+{
+ return wxTimeSpan(ts).Multiply(n);
+}
+
+// this enum is only used in wxTimeSpan::Format() below but we can't declare
+// it locally to the method as it provokes an internal compiler error in egcs
+// 2.91.60 when building with -O2
+enum TimeSpanPart
+{
+ Part_Week,
+ Part_Day,
+ Part_Hour,
+ Part_Min,
+ Part_Sec,
+ Part_MSec
+};
+
+// not all strftime(3) format specifiers make sense here because, for example,
+// a time span doesn't have a year nor a timezone
+//
+// Here are the ones which are supported (all of them are supported by strftime
+// as well):
+// %H hour in 24 hour format
+// %M minute (00 - 59)
+// %S second (00 - 59)
+// %% percent sign
+//
+// Also, for MFC CTimeSpan compatibility, we support
+// %D number of days
+//
+// And, to be better than MFC :-), we also have
+// %E number of wEeks
+// %l milliseconds (000 - 999)
+wxString wxTimeSpan::Format(const wxString& format) const
+{
+ wxCHECK_MSG( !format.empty(), wxEmptyString,
+ _T("NULL format in wxTimeSpan::Format") );
+
+ wxString str;
+ str.Alloc(format.length());
+
+ // Suppose we have wxTimeSpan ts(1 /* hour */, 2 /* min */, 3 /* sec */)
+ //
+ // Then, of course, ts.Format("%H:%M:%S") must return "01:02:03", but the
+ // question is what should ts.Format("%S") do? The code here returns "3273"
+ // in this case (i.e. the total number of seconds, not just seconds % 60)
+ // because, for me, this call means "give me entire time interval in
+ // seconds" and not "give me the seconds part of the time interval"
+ //
+ // If we agree that it should behave like this, it is clear that the
+ // interpretation of each format specifier depends on the presence of the
+ // other format specs in the string: if there was "%H" before "%M", we
+ // should use GetMinutes() % 60, otherwise just GetMinutes() &c
+
+ // we remember the most important unit found so far
+ TimeSpanPart partBiggest = Part_MSec;
+
+ for ( wxString::const_iterator pch = format.begin(); pch != format.end(); ++pch )
+ {
+ wxChar ch = *pch;
+
+ if ( ch == _T('%') )
+ {
+ // the start of the format specification of the printf() below
+ wxString fmtPrefix(_T('%'));
+
+ // the number
+ long n;
+
+ // the number of digits for the format string, 0 if unused
+ unsigned digits = 0;
+
+ ch = *++pch; // get the format spec char
+ switch ( ch )
+ {
+ default:
+ wxFAIL_MSG( _T("invalid format character") );
+ // fall through
+
+ case _T('%'):
+ str += ch;
+
+ // skip the part below switch
+ continue;
+
+ case _T('D'):
+ n = GetDays();
+ if ( partBiggest < Part_Day )
+ {
+ n %= DAYS_PER_WEEK;
+ }
+ else
+ {
+ partBiggest = Part_Day;
+ }
+ break;
+
+ case _T('E'):
+ partBiggest = Part_Week;
+ n = GetWeeks();
+ break;
+
+ case _T('H'):
+ n = GetHours();
+ if ( partBiggest < Part_Hour )
+ {
+ if ( n < 0 )
+ {
+ // the sign has already been taken into account
+ // when outputting the biggest part
+ n = -n;
+ }
+
+ n %= HOURS_PER_DAY;
+ }
+ else
+ {
+ partBiggest = Part_Hour;
+ }
+
+ digits = 2;
+ break;
+
+ case _T('l'):
+ n = GetMilliseconds().ToLong();
+ if ( partBiggest < Part_MSec )
+ {
+ if ( n < 0 )
+ n = -n;
+
+ n %= 1000;
+ }
+ //else: no need to reset partBiggest to Part_MSec, it is
+ // the least significant one anyhow
+
+ digits = 3;
+ break;
+
+ case _T('M'):
+ n = GetMinutes();
+ if ( partBiggest < Part_Min )
+ {
+ if ( n < 0 )
+ n = -n;
+
+ n %= MIN_PER_HOUR;
+ }
+ else
+ {
+ partBiggest = Part_Min;
+ }
+
+ digits = 2;
+ break;
+
+ case _T('S'):
+ n = GetSeconds().ToLong();
+ if ( partBiggest < Part_Sec )
+ {
+ if ( n < 0 )
+ n = -n;
+
+ n %= SEC_PER_MIN;
+ }
+ else
+ {
+ partBiggest = Part_Sec;
+ }
+
+ digits = 2;
+ break;
+ }
+
+ if ( digits )
+ {
+ // negative numbers need one extra position for '-' display
+ if ( n < 0 )
+ digits++;
+
+ fmtPrefix << _T("0") << digits;
+ }
+
+ str += wxString::Format(fmtPrefix + _T("ld"), n);
+ }
+ else
+ {
+ // normal character, just copy
+ str += ch;
+ }
+ }
+
+ return str;
+}
+
+// ============================================================================
+// wxDateTimeHolidayAuthority and related classes
+// ============================================================================
+
+#include "wx/arrimpl.cpp"
+
+WX_DEFINE_OBJARRAY(wxDateTimeArray)
+
+static int wxCMPFUNC_CONV
+wxDateTimeCompareFunc(wxDateTime **first, wxDateTime **second)
+{
+ wxDateTime dt1 = **first,
+ dt2 = **second;
+
+ return dt1 == dt2 ? 0 : dt1 < dt2 ? -1 : +1;
+}
+
+// ----------------------------------------------------------------------------
+// wxDateTimeHolidayAuthority
+// ----------------------------------------------------------------------------
+
+wxHolidayAuthoritiesArray wxDateTimeHolidayAuthority::ms_authorities;
+
+/* static */
+bool wxDateTimeHolidayAuthority::IsHoliday(const wxDateTime& dt)
+{
+ size_t count = ms_authorities.size();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ 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;
+
+ holidays.Clear();
+
+ 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);
+ }
+
+ 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( _T("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() )
+ {
+ holidays.Add(dt);
+ }
+
+ for ( dt = dtSunFirst; dt <= dtSunLast; dt += wxDateSpan::Week() )
+ {
+ holidays.Add(dt);
+ }
+
+ return holidays.GetCount();
+}
+
+// ============================================================================
+// other helper functions
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// 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, _T("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, _T("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, _T("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, _T("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,
+ 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 =
+ st->wHour =
+ st->wMinute =
+ st->wSecond =
+ st->wMilliseconds = 0;
+}
+#endif // __WXMSW__
+
+#endif // wxUSE_DATETIME
projects / wxWidgets.git / blobdiff