// wxInvalidDateTime)
class WXDLLEXPORT wxDateTime;
-WXDLLEXPORT_DATA(extern wxDateTime&) wxDefaultDateTime;
+WXDLLEXPORT_DATA(extern const wxDateTime&) wxDefaultDateTime;
#define wxInvalidDateTime wxDefaultDateTime
// ----------------------------------------------------------------------------
// result of timezone shift)
// ------------------------------------------------------------------------
- // is the date valid (TRUE even for non initialized objects)?
- inline bool IsValid() const { return this != &wxInvalidDateTime; }
+ // is the date valid? Note that this will return TRUE for non
+ // initialized objects but FALSE if *this == wxInvalidDateTime
+ inline bool IsValid() const { return m_time != wxInvalidDateTime.m_time; }
// get the broken down date/time representation in the given timezone
//
#define wxLongLong_t long long
#else // no native long long type
// both warning and pragma warning are not portable, but at least an
- // unknown pragma should never be an error.
- // Err, actually, Watcom C++ doesn't like it.
- // (well, if the compilers are _that_ broken, I'm removing it (VZ))
-#if 0 //ndef __WATCOMC__
+ // unknown pragma should never be an error - unless the compiler is
+ // seriously broken as Watcom C++ seems to be...
+#ifndef __WATCOMC__
#pragma warning "Your compiler does not appear to support 64 bit "\
"integers, using emulation class instead."
#endif
// both classes) but by default we only use one class
#if (defined(wxUSE_LONGLONG_WX) && wxUSE_LONGLONG_WX) || !defined(wxLongLong_t)
// don't use both classes unless wxUSE_LONGLONG_NATIVE was explicitly set:
- // this is useful in test programs nad only there
+ // this is useful in test programs and only there
#ifndef wxUSE_LONGLONG_NATIVE
#define wxUSE_LONGLONG_NATIVE 0
#endif
#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;
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) )