public override void Step(object[] args, int stepNumber, ref object contextData)
{
if (args[0] == null)
{
return;
}
byte[] arrayBytes = args[0] as byte[];
if (arrayBytes == null || arrayBytes.Length % 8 > 0)
{
throw new ArgumentException("double_array_sum only works with BLOBs of double precision floats");
}
int arrayLength = arrayBytes.Length / 8;
if (stepNumber == 1)
{
contextData = Enumerable.Repeat(0.0, arrayLength).ToArray();
}
double[] arrayValues = contextData as double[];
ArrayCaster.AsFloatArray(arrayBytes, floats =>
{
for (int i = 0; i < arrayLength; ++i)
{
arrayValues[i] += floats[i];
}
});
}
public override object Final(object contextData)
{
double[] arrayValues = contextData as double[];
if (arrayValues == null)
return DBNull.Value;
byte[] result = new byte[arrayValues.Length * sizeof(double)];
ArrayCaster.AsByteArray(arrayValues, bytes => bytes.CopyTo(result, 0));
return result;
}
