public static CalendarOpPlusFastAddResult ComputeNextDue(
long currentTime,
TimePeriod timePeriod,
DateTimeEx reference)
{
if (reference.TimeInMillis > currentTime)
{
return(new CalendarOpPlusFastAddResult(0, reference.DateTime));
}
// add one time period
var work = new DateTimeEx(reference);
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work.DateTime.Print());
}
CalendarOpPlusMinus.ActionSafeOverflow(work, 1, timePeriod);
long inMillis = work.TimeInMillis;
if (inMillis > currentTime)
{
return(new CalendarOpPlusFastAddResult(1, work.DateTime));
}
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work.DateTime.Print());
}
long factor = 1;
// determine multiplier
long deltaCurrentToStart = currentTime - reference.TimeInMillis;
long deltaAddedOne = work.TimeInMillis - reference.TimeInMillis;
double multiplierDbl = (deltaCurrentToStart / deltaAddedOne) - 1;
long multiplierRoundedLong = (long)multiplierDbl;
// handle integer max
while (multiplierRoundedLong > int.MaxValue)
{
CalendarOpPlusMinus.ActionSafeOverflow(work, int.MaxValue, timePeriod);
factor += int.MaxValue;
multiplierRoundedLong -= int.MaxValue;
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work.DateTime.Print() + " factor " + factor);
}
}
// add
int multiplierRoundedInt = (int)multiplierRoundedLong;
CalendarOpPlusMinus.ActionSafeOverflow(work, multiplierRoundedInt, timePeriod);
factor += multiplierRoundedInt;
// if below, add more
if (work.TimeInMillis <= currentTime)
{
while (work.TimeInMillis <= currentTime)
{
CalendarOpPlusMinus.ActionSafeOverflow(work, 1, timePeriod);
factor += 1;
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work.DateTime.Print() + " factor " + factor);
}
}
return(new CalendarOpPlusFastAddResult(factor, work.DateTime));
}
// we are over
while (work.TimeInMillis > currentTime)
{
CalendarOpPlusMinus.ActionSafeOverflow(work, -1, timePeriod);
factor -= 1;
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work.DateTime.Print() + " factor " + factor);
}
}
CalendarOpPlusMinus.ActionSafeOverflow(work, 1, timePeriod);
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work.DateTime.Print() + " factor " + factor);
}
return(new CalendarOpPlusFastAddResult(factor + 1, work.DateTime));
}
public static CalendarOpPlusFastAddResult ComputeNextDue(
long currentTime,
TimePeriod timePeriod,
DateTimeEx reference,
TimeAbacus timeAbacus,
long remainder)
{
if (timeAbacus.CalendarGet(reference, remainder) > currentTime)
{
return new CalendarOpPlusFastAddResult(0, reference);
}
// add one time period
DateTimeEx work = reference.Clone();
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is " + work);
}
CalendarOpPlusMinus.ActionSafeOverflow(work, 1, timePeriod);
long inMillis = timeAbacus.CalendarGet(work, remainder);
if (inMillis > currentTime)
{
return new CalendarOpPlusFastAddResult(1, work);
}
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is {0}", work);
}
long factor = 1;
// determine multiplier
long refTime = timeAbacus.CalendarGet(reference, remainder);
long deltaCurrentToStart = currentTime - refTime;
long deltaAddedOne = timeAbacus.CalendarGet(work, remainder) - refTime;
double multiplierDbl = (deltaCurrentToStart/deltaAddedOne) - 1;
var multiplierRoundedLong = (long) multiplierDbl;
// handle integer max
while (multiplierRoundedLong > Int32.MaxValue)
{
CalendarOpPlusMinus.ActionSafeOverflow(work, Int32.MaxValue, timePeriod);
factor += Int32.MaxValue;
multiplierRoundedLong -= Int32.MaxValue;
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is {0} factor {1}", work, factor);
}
}
// add
var multiplierRoundedInt = (int) multiplierRoundedLong;
CalendarOpPlusMinus.ActionSafeOverflow(work, multiplierRoundedInt, timePeriod);
factor += multiplierRoundedInt;
// if below, add more
if (timeAbacus.CalendarGet(work, remainder) <= currentTime)
{
while (timeAbacus.CalendarGet(work, remainder) <= currentTime)
{
CalendarOpPlusMinus.ActionSafeOverflow(work, 1, timePeriod);
factor += 1;
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is {0} factor {1}", work, factor);
}
}
return new CalendarOpPlusFastAddResult(factor, work);
}
// we are over
while (timeAbacus.CalendarGet(work, remainder) > currentTime)
{
CalendarOpPlusMinus.ActionSafeOverflow(work, -1, timePeriod);
factor -= 1;
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is {0} factor {1}", work, factor);
}
}
CalendarOpPlusMinus.ActionSafeOverflow(work, 1, timePeriod);
if (DEBUG && Log.IsDebugEnabled)
{
Log.Debug("Work date is {0} factor {1}", work, factor);
}
return new CalendarOpPlusFastAddResult(factor + 1, work);
}
