#endif
#endif // !WX_TIMEZONE
+// ----------------------------------------------------------------------------
+// macros
+// ----------------------------------------------------------------------------
+
+// debugging helper: just a convenient replacement of wxCHECK()
+#define wxDATETIME_CHECK(expr, msg) \
+ if ( !(expr) ) \
+ { \
+ wxFAIL_MSG(msg); \
+ *this = wxInvalidDateTime; \
+ return *this; \
+ }
+
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// global data
// ----------------------------------------------------------------------------
-static wxDateTime gs_dtDefault;
+// in the fine tradition of ANSI C we use our equivalent of (time_t)-1 to
+// indicate an invalid wxDateTime object
+static const wxDateTime gs_dtDefault = wxLongLong((long)ULONG_MAX, ULONG_MAX);
-wxDateTime& wxDefaultDateTime = gs_dtDefault;
+const wxDateTime& wxDefaultDateTime = gs_dtDefault;
wxDateTime::Country wxDateTime::ms_country = wxDateTime::Country_Unknown;
{
// just call localtime() instead of figuring out whether this system
// supports tzset(), _tzset() or something else
- time_t t;
- (void)localtime(&t);
+ time_t t = 0;
+ (void)localtime(&t);
s_timezoneSet = TRUE;
}
wxFAIL_MSG( _T("mktime() failed") );
- return wxInvalidDateTime;
+ *this = wxInvalidDateTime;
+
+ return *this;
}
else
{
// 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,
- wxInvalidDateTime,
- _T("Invalid time in wxDateTime::Set()") );
+ wxDATETIME_CHECK( hour < 24 &&
+ second < 62 &&
+ minute < 60 &&
+ millisec < 1000,
+ _T("Invalid time in wxDateTime::Set()") );
// get the current date from system
struct tm *tm = GetTmNow();
- wxCHECK_MSG( tm, wxInvalidDateTime, _T("localtime() failed") );
+ wxDATETIME_CHECK( tm, _T("localtime() failed") );
// adjust the time
tm->tm_hour = hour;
{
wxASSERT_MSG( IsValid(), _T("invalid wxDateTime") );
- wxCHECK_MSG( hour < 24 && second < 62 && minute < 60 && millisec < 1000,
- wxInvalidDateTime,
- _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( (0 < day) && (day <= GetNumberOfDays(month, year)),
- wxInvalidDateTime,
- _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;
wxDateTime& wxDateTime::SetToWeekDayInSameWeek(WeekDay weekday)
{
- wxCHECK_MSG( weekday != Inv_WeekDay, wxInvalidDateTime, _T("invalid weekday") );
+ wxDATETIME_CHECK( weekday != Inv_WeekDay, _T("invalid weekday") );
WeekDay wdayThis = GetWeekDay();
if ( weekday == wdayThis )
wxDateTime& wxDateTime::SetToNextWeekDay(WeekDay weekday)
{
- wxCHECK_MSG( weekday != Inv_WeekDay, wxInvalidDateTime, _T("invalid weekday") );
+ wxDATETIME_CHECK( weekday != Inv_WeekDay, _T("invalid weekday") );
int diff;
WeekDay wdayThis = GetWeekDay();
wxDateTime& wxDateTime::SetToPrevWeekDay(WeekDay weekday)
{
- wxCHECK_MSG( weekday != Inv_WeekDay, wxInvalidDateTime, _T("invalid weekday") );
+ wxDATETIME_CHECK( weekday != Inv_WeekDay, _T("invalid weekday") );
int diff;
WeekDay wdayThis = GetWeekDay();
wxDateTime& wxDateTime::SetToYearDay(wxDateTime::wxDateTime_t yday)
{
int year = GetYear();
- wxCHECK_MSG( (0 < yday) && (yday <= GetNumberOfDays(year)),
- wxInvalidDateTime, _T("invalid year day") );
+ wxDATETIME_CHECK( (0 < yday) && (yday <= GetNumberOfDays(year)),
+ _T("invalid year day") );
bool isLeap = IsLeapYear(year);
for ( Month mon = Jan; mon < Inv_Month; wxNextMonth(mon) )
}
}
+ // 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?
while ( tok.HasMoreTokens() )
{
wxString token = tok.GetNextToken();
+ if ( !token )
+ continue;
// is it a number?
unsigned long val;
bool isDay = FALSE,
isMonth = FALSE,
- // only years are counted from 0
- isYear = (val == 0) || (val > 31);
- if ( !isYear )
+ isYear = FALSE;
+
+ if ( !haveMon && val > 0 && val <= 12 )
{
- // may be the month or month day or the year, assume the
- // month day by default and fallback to month if the range
- // allow it or to the year if our assumption doesn't work
- if ( haveDay )
+ // assume it is month
+ isMonth = TRUE;
+ }
+ else // not the month
+ {
+ wxDateTime_t maxDays = haveMon
+ ? GetNumOfDaysInMonth(haveYear ? year : Inv_Year, mon)
+ : 31;
+
+ // can it be day?
+ if ( (val == 0) || (val > maxDays) )
{
- // we already have the day, so may only be a month or year
- if ( val > 12 )
- {
- isYear = TRUE;
- }
- else
- {
- isMonth = TRUE;
- }
+ isYear = TRUE;
}
- else // it may be day
+ else
{
isDay = TRUE;
-
- // check the range
- if ( haveMon )
- {
- if ( val > GetNumOfDaysInMonth(haveYear ? year
- : Inv_Year,
- mon) )
- {
- // oops, it can't be a day finally
- isDay = FALSE;
-
- if ( val > 12 )
- {
- isYear = TRUE;
- }
- else
- {
- isMonth = TRUE;
- }
- }
- }
}
}
- // remember that we have this and stop the scan if it's the second
- // time we find this, except for the day logic (see there)
if ( isYear )
{
if ( haveYear )
- {
break;
- }
haveYear = TRUE;
- // no roll over - 99 means 99, not 1999 for us
year = (wxDateTime_t)val;
}
- else if ( isMonth )
+ else if ( isDay )
{
- if ( haveMon )
- {
+ if ( haveDay )
break;
- }
- haveMon = TRUE;
+ haveDay = TRUE;
- // month 1 is Jan
- mon = (wxDateTime::Month)(val - 1);
+ day = (wxDateTime_t)val;
}
- else
+ else if ( isMonth )
{
- wxASSERT_MSG( isDay, _T("logic error") );
-
- if ( haveDay )
- {
- // may be were mistaken when we found it for the first
- // time? may be it was a month or year instead?
- //
- // this ability to "backtrack" allows us to correctly parse
- // both things like 01/13 and 13/01 - but, of course, we
- // still can't resolve the ambiguity in 01/02 (it will be
- // Feb 1 for us, not Jan 2 as americans might expect!)
- if ( (day <= 12) && !haveMon )
- {
- // exchange day and month
- mon = (wxDateTime::Month)(day - 1);
-
- haveMon = TRUE;
- }
- else if ( !haveYear )
- {
- // exchange day and year
- year = day;
-
- haveYear = TRUE;
- }
- }
-
- haveDay = TRUE;
+ haveMon = TRUE;
- day = (wxDateTime_t)val;
+ mon = (Month)(val - 1);
}
}
else // not a number
// it's a month
if ( haveMon )
{
- break;
+ // 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
+ else // not a valid month name
{
wday = GetWeekDayFromName(token, Name_Full | Name_Abbr);
if ( wday != Inv_WeekDay )
haveWDay = TRUE;
}
- else
+ else // not a valid weekday name
{
// try the ordinals
static const wxChar *ordinals[] =
wxTRANSLATE("nineteenth"),
wxTRANSLATE("twentieth"),
// that's enough - otherwise we'd have problems with
- // composite (or not) ordinals otherwise
+ // composite (or not) ordinals
};
size_t n;
projects / wxWidgets.git / blobdiff