diff --git a/src/common/datetime.cpp b/src/common/datetime.cpp index eafbeeb586..5cceff453a 100644 --- a/src/common/datetime.cpp +++ b/src/common/datetime.cpp @@ -1844,257 +1844,264 @@ wxString wxDateTime::Format(const wxChar *format, const TimeZone& tz) const fmt = _T("%02d"); } -restart: - // start of the format specification - switch ( *p ) + bool restart = TRUE; + while ( restart ) { - 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; + restart = FALSE; - case _T('b'): // a month name - case _T('B'): - res += GetMonthName(tm.mon, - *p == _T('b') ? Name_Abbr : Name_Full); - break; + // 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('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. + case _T('b'): // a month name + case _T('B'): + res += GetMonthName(tm.mon, + *p == _T('b') ? Name_Abbr : Name_Full); + break; - 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 + case _T('c'): // locale default date and time representation + case _T('x'): // locale default date representation // - // 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 ) + // 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! { - str.Replace(replacement2, strYear2); - str.Replace(replacement, strYear); + // 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('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; } - res += str; - } - break; + if ( !fmt.IsEmpty() ) + { + // we've only got the flags and width so far in fmt + fmt.Prepend(_T('%')); + fmt.Append(_T('d')); - case _T('d'): // day of a month (01-31) - res += wxString::Format(fmt, tm.mday); - break; + restart = TRUE; - case _T('H'): // hour in 24h format (00-23) - res += wxString::Format(fmt, tm.hour); - break; + 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; + // no, it wasn't the width + wxFAIL_MSG(_T("unknown format specificator")); - case _T('j'): // day of the year - res += wxString::Format(fmt, GetDayOfYear(tz)); - break; + // fall through and just copy it nevertheless - case _T('m'): // month as a number (01-12) - res += wxString::Format(fmt, tm.mon + 1); - break; + case _T('%'): // a percent sign + res += *p; + break; - case _T('M'): // minute as a decimal number (00-59) - res += wxString::Format(fmt, tm.min); - break; + case 0: // the end of string + wxFAIL_MSG(_T("missing format at the end of string")); - 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')); - - goto restart; - } - - // 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; + // just put the '%' which was the last char in format + res += _T('%'); + break; + } } }