protected override bool ReachedIterationLevel()
{
long currentIndexCount = SourceHistogram.GetCountAt(CurrentBucketIndex, CurrentSubBucketIndex);
return((currentIndexCount != 0) &&
(
(_visitedSubBucketIndex != CurrentSubBucketIndex) ||
(_visitedBucketIndex != CurrentBucketIndex
)));
}
private void IncrementSubBucket()
{
_freshSubBucket = true;
// Take on the next index:
CurrentBucketIndex = _nextBucketIndex;
CurrentSubBucketIndex = _nextSubBucketIndex;
_currentValueAtIndex = _nextValueAtIndex;
// Figure out the next next index:
_nextSubBucketIndex++;
if (_nextSubBucketIndex >= SourceHistogram.SubBucketCount)
{
_nextSubBucketIndex = SourceHistogram.SubBucketHalfCount;
_nextBucketIndex++;
}
_nextValueAtIndex = SourceHistogram.ValueFromIndex(_nextBucketIndex, _nextSubBucketIndex);
}
/// <summary>
/// Returns the next element in the iteration.
/// </summary>
/// <returns>the <see cref="HistogramIterationValue"/> associated with the next element in the iteration.</returns>
private HistogramIterationValue Next()
{
// Move through the sub buckets and buckets until we hit the next reporting level:
while (!ExhaustedSubBuckets())
{
CountAtThisValue = SourceHistogram.GetCountAt(CurrentBucketIndex, CurrentSubBucketIndex);
if (_freshSubBucket)
{
// Don't add unless we've incremented since last bucket...
TotalCountToCurrentIndex += CountAtThisValue;
_totalValueToCurrentIndex += CountAtThisValue * SourceHistogram.MedianEquivalentValue(_currentValueAtIndex);
_freshSubBucket = false;
}
if (ReachedIterationLevel())
{
var valueIteratedTo = GetValueIteratedTo();
_currentIterationValue.Set(
valueIteratedTo,
_prevValueIteratedTo,
CountAtThisValue,
(TotalCountToCurrentIndex - _totalCountToPrevIndex),
TotalCountToCurrentIndex,
_totalValueToCurrentIndex,
((100.0 * TotalCountToCurrentIndex) / ArrayTotalCount),
GetPercentileIteratedTo());
_prevValueIteratedTo = valueIteratedTo;
_totalCountToPrevIndex = TotalCountToCurrentIndex;
// move the next iteration level forward:
IncrementIterationLevel();
if (SourceHistogram.TotalCount != _savedHistogramTotalRawCount)
{
throw new InvalidOperationException("Source has been modified during enumeration.");
}
return(_currentIterationValue);
}
IncrementSubBucket();
}
// Should not reach here. But possible for overflowed histograms under certain conditions
throw new ArgumentOutOfRangeException();
}
protected override void IncrementIterationLevel()
{
_nextValueReportingLevel *= (long)_logBase;
_nextValueReportingLevelLowestEquivalent = SourceHistogram.LowestEquivalentValue(_nextValueReportingLevel);
}
protected override void IncrementIterationLevel()
{
_nextValueReportingLevel += _valueUnitsPerBucket;
_nextValueReportingLevelLowestEquivalent = SourceHistogram.LowestEquivalentValue(_nextValueReportingLevel);
}
protected virtual long GetValueIteratedTo()
{
return(SourceHistogram.HighestEquivalentValue(_currentValueAtIndex));
}