public virtual int CompareTo(LogItemViewModelBase other)
{
// First compare the items by time
int i = this.Time.CompareTo(other.Time);
if (i != 0)
{
return(i);
}
// If the time is equal, consider the event counter value and handle overflows
const int range = 10000;
if (EventCounter > int.MaxValue - range && other.EventCounter < int.MinValue + range)
{
// Overflow, other is newer
return(-1);
}
if (EventCounter < int.MinValue + range && other.EventCounter > int.MaxValue - range)
{
// Overflow, other is older
return(1);
}
return(EventCounter.CompareTo(other.EventCounter));
}
public override int CompareTo(LogItemViewModelBase other)
{
// Only stay here if both objects are a FieldLog item
FieldLogItemViewModel flOther = other as FieldLogItemViewModel;
if (flOther == null)
{
return(base.CompareTo(other));
}
// First compare the items by time (close is equal)
const long closeTicks = 10000000; // 1 second
long timeDiff = this.Time.Ticks - other.Time.Ticks;
if (timeDiff > closeTicks)
{
return(1);
}
if (timeDiff < -closeTicks)
{
return(-1);
}
// If the time is close and the session is equal, consider the event counter value and handle overflows
if (SessionId == flOther.SessionId)
{
const int range = 10000;
if (EventCounter > int.MaxValue - range && other.EventCounter < int.MinValue + range)
{
// Overflow, other is newer
return(-1);
}
if (EventCounter < int.MinValue + range && other.EventCounter > int.MaxValue - range)
{
// Overflow, other is older
return(1);
}
return(EventCounter.CompareTo(other.EventCounter));
}
// Otherwise stay with the time
return(this.Time.CompareTo(other.Time));
}