double Date_secondsSinceNow(const Date *self)
{
Date *now = Date_new();
double s = Date_secondsSince_(now, self);
Date_free(now);
return s;
}
IO_METHOD(IoDate, secondsSince_)
{
/*doc Date secondsSince(aDate)
Returns a number of seconds of between aDate and the receiver.
*/
IoDate *date = IoMessage_locals_dateArgAt_(m, locals, 0);
return IONUMBER(Date_secondsSince_(DATA(self), DATA(date)));
}
IO_METHOD(IoDate, subtract)
{
/*doc Date -(aDurationOrDate)
Return a new Date with the receiver's value minus an amount of time specified by aDuration to the receiver. Returns self.
*/
IoObject *v = IoMessage_locals_valueArgAt_(m, locals, 0);
if (ISDATE(v))
{
double d = Date_secondsSince_(DATA(self), DATA(v));
return IoDuration_newWithSeconds_(IOSTATE, d);
}
else if (ISDURATION(v))
{
IoDate *newDate = IOCLONE(self);
Date_subtractDuration_(DATA(newDate), IoDuration_duration(v));
return newDate;
}
IOASSERT(1, "Date or Duration argument required");
return IONIL(self);
}
Duration *Date_newDurationBySubtractingDate_(const Date *self, const Date *other)
{
double d = Date_secondsSince_(self, other);
return Duration_newWithSeconds_(d);
}
