+ tm *tm;
+ if ( tz.GetOffset() == -GetTimeZone() )
+ {
+ // we are working with local time
+ tm = localtime(&time);
+
+ // should never happen
+ wxCHECK_MSG( tm, wxEmptyString, _T("localtime() failed") );
+ }
+ else
+ {
+ time += (int)tz.GetOffset();
+
+#ifdef __VMS__ // time is unsigned so avoid the warning
+ int time2 = (int) time;
+ if ( time2 >= 0 )
+#else
+ if ( time >= 0 )
+#endif
+ {
+ tm = gmtime(&time);
+
+ // should never happen
+ wxCHECK_MSG( tm, wxEmptyString, _T("gmtime() failed") );
+ }
+ else
+ {
+ tm = (struct tm *)NULL;
+ }
+ }
+
+ if ( tm )
+ {
+ return CallStrftime(format, tm);
+ }
+ //else: use generic code below
+ }
+
+ // 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 ( const wxChar *p = format; *p; p++ )
+ {
+ if ( *p != _T('%') )
+ {
+ // copy as is
+ res += *p;
+
+ continue;
+ }
+
+ // set the default format
+ switch ( *++p )
+ {
+ 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;
+
+ 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");
+ }
+
+ bool restart = TRUE;
+ while ( restart )
+ {
+ restart = FALSE;
+
+ // start of the format specification
+ switch ( *p )
+ {
+ 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;
+
+ case _T('b'): // a month name
+ case _T('B'):
+ res += GetMonthName(tm.mon,
+ *p == _T('b') ? Name_Abbr : Name_Full);
+ break;
+
+ case _T('c'): // locale default date and time representation
+ case _T('x'): // locale default date representation
+ //
+ // 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 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. Notice that "all occurences of YEAR"
+ // means all occurences 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 or 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;
+ }
+
+ // at any rate, we couldn't go further than 1988 + 9 + 28!
+ wxASSERT_MSG( year < 2030,
+ _T("logic error in wxDateTime::Format") );
+
+ wxString strYear, strYear2;
+ strYear.Printf(_T("%d"), year);
+ strYear2.Printf(_T("%d"), year % 100);
+
+ // find two strings 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 )
+ {
+ replacement << (wxChar)-1;
+ }
+
+ wxString replacement2 = (wxChar)-2;
+ while ( fmt.Find(replacement) != wxNOT_FOUND )
+ {
+ replacement << (wxChar)-2;
+ }
+
+ // replace all occurences of year with it
+ bool wasReplaced = fmt.Replace(strYear, replacement) > 0;
+ if ( !wasReplaced )
+ wasReplaced = fmt.Replace(strYear2, replacement2) > 0;
+
+ // 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 occurence of 1999 with the real year
+ wxString strYearReal, strYearReal2;
+ strYearReal.Printf(_T("%04d"), yearReal);
+ strYearReal2.Printf(_T("%02d"), yearReal % 100);
+ str.Replace(strYear, strYearReal);
+ str.Replace(strYear2, strYearReal2);
+
+ // and replace back all occurences of replacement string
+ if ( wasReplaced )
+ {
+ str.Replace(replacement2, strYear2);
+ str.Replace(replacement, strYear);
+ }
+
+ res += str;
+ }
+ break;
+
+ case _T('d'): // day of a month (01-31)
+ res += wxString::Format(fmt, tm.mday);
+ break;
+
+ case _T('H'): // hour in 24h format (00-23)
+ res += wxString::Format(fmt, tm.hour);
+ break;
+
+ 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;
+
+ case _T('j'): // day of the year
+ res += wxString::Format(fmt, GetDayOfYear(tz));
+ break;
+
+ case _T('l'): // milliseconds (NOT STANDARD)
+ res += wxString::Format(fmt, GetMillisecond(tz));
+ break;
+
+ 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 _T('p'): // AM or PM string
+ res += CallStrftime(_T("%p"), &tmTimeOnly);
+ break;
+
+ case _T('S'): // second as a decimal number (00-61)
+ res += wxString::Format(fmt, tm.sec);
+ break;
+
+ case _T('U'): // week number in the year (Sunday 1st week day)
+ res += wxString::Format(fmt, GetWeekOfYear(Sunday_First, tz));
+ break;
+
+ case _T('W'): // week number in the year (Monday 1st week day)
+ res += wxString::Format(fmt, GetWeekOfYear(Monday_First, tz));
+ break;
+
+ case _T('w'): // weekday as a number (0-6), Sunday = 0
+ res += wxString::Format(fmt, tm.GetWeekDay());
+ break;
+
+ // case _T('x'): -- handled with "%c"
+
+ case _T('X'): // locale default time representation
+ // just use strftime() to format the time for us
+ res += CallStrftime(_T("%X"), &tmTimeOnly);
+ break;
+
+ case _T('y'): // year without century (00-99)
+ res += wxString::Format(fmt, tm.year % 100);
+ break;
+
+ case _T('Y'): // year with century
+ res += wxString::Format(fmt, tm.year);
+ break;
+
+ case _T('Z'): // timezone name
+ res += CallStrftime(_T("%Z"), &tmTimeOnly);
+ break;
+
+ default:
+ // is it the format width?
+ fmt.Empty();
+ while ( *p == _T('-') || *p == _T('+') ||
+ *p == _T(' ') || wxIsdigit(*p) )
+ {
+ fmt += *p;
+ }
+
+ if ( !fmt.IsEmpty() )
+ {
+ // 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"));
+
+ // just put the '%' which was the last char in format
+ res += _T('%');
+ break;
+ }
+ }
+ }
+
+ 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 wxChar *wxDateTime::ParseRfc822Date(const wxChar* date)
+{
+ wxCHECK_MSG( date, (wxChar *)NULL, _T("NULL pointer in wxDateTime::Parse") );
+
+ const wxChar *p = date;
+ const wxChar *comma = wxStrchr(p, _T(','));
+ 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 (wxChar *)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 (wxChar *)NULL;
+ }
+
+ wxDateTime_t day = *p++ - _T('0');
+ if ( wxIsdigit(*p) )
+ {
+ day *= 10;
+ day += *p++ - _T('0');
+ }
+
+ if ( *p++ != _T(' ') )
+ {
+ return (wxChar *)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 (wxChar *)NULL;
+ }
+
+ p += 3;
+
+ if ( *p++ != _T(' ') )
+ {
+ return (wxChar *)NULL;
+ }
+
+ // next is the year
+ if ( !wxIsdigit(*p) )
+ {
+ // no year?
+ return (wxChar *)NULL;
+ }
+
+ int year = *p++ - _T('0');
+
+ if ( !wxIsdigit(*p) )
+ {
+ // should have at least 2 digits in the year
+ return (wxChar *)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 (wxChar *)NULL;
+ }
+
+ year *= 10;
+ year += *p++ - _T('0');
+ }
+
+ if ( *p++ != _T(' ') )
+ {
+ return (wxChar *)NULL;
+ }
+
+ // time is in the format hh:mm:ss and seconds are optional
+ if ( !wxIsdigit(*p) )
+ {
+ return (wxChar *)NULL;
+ }
+
+ wxDateTime_t hour = *p++ - _T('0');
+
+ if ( !wxIsdigit(*p) )
+ {
+ return (wxChar *)NULL;
+ }
+
+ hour *= 10;
+ hour += *p++ - _T('0');
+
+ if ( *p++ != _T(':') )
+ {
+ return (wxChar *)NULL;
+ }
+
+ if ( !wxIsdigit(*p) )
+ {
+ return (wxChar *)NULL;
+ }
+
+ wxDateTime_t min = *p++ - _T('0');
+
+ if ( !wxIsdigit(*p) )
+ {
+ return (wxChar *)NULL;
+ }
+
+ min *= 10;
+ min += *p++ - _T('0');
+
+ wxDateTime_t sec = 0;
+ if ( *p++ == _T(':') )
+ {
+ if ( !wxIsdigit(*p) )
+ {
+ return (wxChar *)NULL;
+ }
+
+ sec = *p++ - _T('0');
+
+ if ( !wxIsdigit(*p) )
+ {
+ return (wxChar *)NULL;
+ }
+
+ sec *= 10;
+ sec += *p++ - _T('0');
+ }
+
+ if ( *p++ != _T(' ') )
+ {
+ return (wxChar *)NULL;
+ }
+
+ // and now the interesting part: the timezone
+ int offset;
+ 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 (wxChar *)NULL;
+ }
+
+ // hours
+ offset = 60*(10*(*p - _T('0')) + (*(p + 1) - _T('0')));
+
+ p += 2;
+
+ if ( !wxIsdigit(*p) || !wxIsdigit(*(p + 1)) )
+ {
+ return (wxChar *)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 (wxChar *)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 (wxChar *)NULL;
+ }
+
+ p += tz.length();
+ }
+
+ // make it minutes
+ offset *= 60;
+ }
+
+ // the spec was correct
+ Set(day, mon, year, hour, min, sec);
+ MakeTimezone((wxDateTime_t)(60*offset));
projects / wxWidgets.git / blobdiff