private unsafe void SumupLeaf(SumupInputData input, FeatureHistogram histogram)
{
if (_length == 0)
{
return;
}
int nextStep = _deltas[0];
int pos = 0;
fixed(int *pDocIndicesFixed = input.DocIndices)
fixed(FloatType * pOutputsFixed = input.Outputs)
fixed(double *pWeightsFixed = input.Weights)
fixed(double *pSumWeightsFixed = histogram.SumWeightsByBin)
{
int * pdoc = pDocIndicesFixed;
int * end = pDocIndicesFixed + input.TotalCount;
FloatType *pOutputs = pOutputsFixed;
double * pWeights = pWeightsFixed;
while (pdoc < end)
{
while (nextStep <= *pdoc)
{
nextStep += _deltas[++pos];
}
int bin = _values[pos];
int count = 0;
FloatType subsum = histogram.SumTargetsByBin[bin];
if (pWeightsFixed != null)
{
double subweightsum = histogram.SumWeightsByBin[bin];
while (pdoc < end && nextStep > *pdoc)
{
subsum += *(pOutputs++);
subweightsum += *(pWeights++);
count++;
pdoc++;
}
histogram.SumWeightsByBin[bin] = subweightsum;
}
else
{
while (pdoc < end && nextStep > *pdoc)
{
subsum += *(pOutputs++);
count++;
pdoc++;
}
}
histogram.SumTargetsByBin[bin] = subsum;
histogram.CountByBin[bin] += count;
}
}
}
private unsafe void SumupRoot(SumupInputData input, FeatureHistogram histogram)
{
fixed(FloatType *pOutputsFixed = input.Outputs)
fixed(FloatType * pSumTargetsFixed = histogram.SumTargetsByBin)
fixed(double *pWeightsFixed = input.Weights)
fixed(double *pSumWeightsFixed = histogram.SumWeightsByBin)
{
FloatType *pOutputs = pOutputsFixed;
double * pWeights = pWeightsFixed;
for (int i = 0; i < _values.Length; i++)
{
int featureBin = _values[i];
//FloatType* pSumTargets = pSumTargetsFixed + featureBin;
FloatType subsum = pSumTargetsFixed[featureBin];
for (int j = 0; j < _deltas[i]; ++j)
{
subsum += pOutputs[j];
}
pSumTargetsFixed[featureBin] = subsum;
if (pWeightsFixed != null)
{
double subweightsum = pSumWeightsFixed[featureBin];
for (int j = 0; j < _deltas[i]; ++j)
{
subweightsum += pWeights[j];
}
pSumWeightsFixed[featureBin] = subweightsum;
pWeights += _deltas[i];
}
pOutputs += _deltas[i];
histogram.CountByBin[featureBin] += _deltas[i];
}
}
}
private static extern unsafe int C_Sumup_double(
int numBits, byte *pData, int *pIndices, double *pSampleOutputs, double *pSampleOutputWeights,
FloatType *pSumTargetsByBin, double *pSumTargets2ByBin, int *pCountByBin,
int totalCount, double totalSampleOutputs, double totalSampleOutputWeights);