int TimeIndex::GetIndex(const DTime& time, int *dist) const {
int i, d;
if (!m_time.IsValid() || !time.IsValid()) {
i = -1, d = 0;
} else {
i = d = m_time.GetDistance(time);
if (d < 0 || d >= (int)m_number_of_values)
i = -1;
}
if (dist)
*dist = d;
return i;
}
int DTime::GetDistance(const DTime &t) const {
assert(IsValid());
assert(t.IsValid());
if (GetPeriod() != t.GetPeriod()) {
wxLogError(_T("our period: %d, his period: %d"), GetPeriod(), t.GetPeriod());
assert(false);
}
const wxDateTime& _t0 = GetTime();
const wxDateTime& _t = t.GetTime();
int ret = -1;
switch (GetPeriod()) {
case PERIOD_T_DECADE:
ret = _t.GetYear() - _t0.GetYear();
break;
case PERIOD_T_YEAR:
ret = _t.GetYear() * 12 + _t.GetMonth()
- _t0.GetYear() * 12 - _t0.GetMonth();
break;
case PERIOD_T_MONTH:
ret = (_t - _t0).GetHours();
//acount for daylight saving time
switch (ret % 24) {
case 1:
ret -= 1;
break;
case 23:
ret += 1;
break;
case -1:
ret += 1;
break;
case -23:
ret -= 1;
break;
}
ret /= 24;
break;
case PERIOD_T_DAY:
ret = (_t - _t0).GetMinutes() / 10;
break;
case PERIOD_T_30MINUTE:
ret = ((_t - _t0).GetSeconds() / 10).ToLong();
break;
case PERIOD_T_5MINUTE:
ret = ((_t - _t0).GetSeconds()).ToLong();
break;
case PERIOD_T_MINUTE:
ret = ((_t - _t0).GetMilliseconds() / 500).ToLong();
break;
case PERIOD_T_30SEC:
ret = ((_t - _t0).GetMilliseconds() / 100).ToLong();
break;
case PERIOD_T_WEEK:
ret = (_t - _t0).GetHours() / 8;
if (_t0.IsDST() != _t.IsDST()) {
if (_t0 < _t && _t.IsDST())
ret += 1;
else if (_t < _t0 && _t0.IsDST())
ret -= 1;
}
break;
case PERIOD_T_SEASON:
ret = (_t - _t0).GetDays() / 7;
if (_t0.IsDST() != _t.IsDST()) {
if (_t0 < _t && _t.IsDST())
ret += 1;
else if (_t < _t0 && _t0.IsDST())
ret -= 1;
}
break;
default:
assert(false);
}
return ret;
}
bool DTime::IsBetween(const DTime& t1, const DTime& t2) const {
if (t1.IsValid() && t2.IsValid())
return t1 <= *this && t2 > *this;
else
return false;
}