private static Double GetAverageSpeed(Func <UInt32, Hash> hashInitializer, Int32 length, Int32 repetitions, Int32 align)
{
RandomXorShift r = new RandomXorShift();
Byte[] key = new Byte[length + 512];
unsafe
{
fixed(Byte *pin = key)
{
UInt64 pinValue = (UInt64)pin;
UInt64 alignValue = ((pinValue + 255ul) & 0xFFFFFFFFFFFFFF00ul) + (UInt64)align;
Int32 offset = (Int32)(alignValue - pinValue);
List <Double> results = new List <Double>(repetitions);
for (Int32 i = 0; i < repetitions; ++i)
{
r.NextBytes(key, offset, length);
Hash hash = hashInitializer((UInt32)i);
using (Clock clock = new Clock(CLOCK_MAXIMUM_IDLE_TIME))
{
DateTime start = clock.GetTime();
hash.ComputeHash(key, offset, length);
DateTime end = clock.GetTime();
Double ms = (end - start).TotalMilliseconds;
Double bps = (length * 1000.0d) / ms;
if (bps >= 0.0d)
{
results.Add(bps);
}
}
}
Double mean = MathUtilities.Mean(results);
Double threshold = 2.0d * MathUtilities.StandardDeviation(results, mean);
for (Int32 i = results.Count - 1; i >= 0; --i)
{
if (Math.Abs(results[i] - mean) > threshold)
{
results.RemoveAt(i);
}
}
return(MathUtilities.Mean(results));
}
}
}
public void Test(UInt32 seed, Int32?sourceLegth, Int32 sourceOffset, Int32?destinationLength, Int32 destinationOffset, Int32 count, Object expectedResult)
{
Byte[] source;
if (sourceLegth.HasValue)
{
source = new Byte[sourceLegth.Value];
RandomXorShift random = new RandomXorShift(seed);
random.NextBytes(source);
}
else
{
source = null;
}
Byte[] destination = destinationLength.HasValue ? new Byte[destinationLength.Value] : null;
Object actualResult;
try
{
UnsafeBuffer.BlockCopy(source, sourceOffset, destination, destinationOffset, count);
actualResult = destination;
}
catch (Exception e)
{
actualResult = e.GetType();
}
if (expectedResult is Byte[] expectedBytes)
{
m_Output.WriteLine($"EXPECTED={{ {String.Join(", ", expectedBytes.Select(x => x.ToString()))} }}");
}
else
{
Type expectedType = (Type)expectedResult;
m_Output.WriteLine($"EXPECTED={((expectedType == null) ? String.Empty : expectedType.Name)}");
}
if (actualResult is Byte[] actualBytes)
{
m_Output.WriteLine($"ACTUAL={{ {String.Join(", ", actualBytes.Select(x => x.ToString()))} }}");
}
else
{
Type actualType = (Type)actualResult;
m_Output.WriteLine($"ACTUAL={((actualType == null) ? String.Empty : actualType.Name)}");
}
Assert.Equal(expectedResult, actualResult);
}
public void BufferTest(UInt32 seed, Int32?bufferLength, Int32 offset, Int32 count, Object expectedResult)
{
RandomXorShift random = new RandomXorShift(seed);
Byte[] buffer = bufferLength.HasValue ? new Byte[bufferLength.Value] : null;
Object actualResult;
try
{
random.NextBytes(buffer, offset, count);
actualResult = buffer;
}
catch (Exception e)
{
actualResult = e.GetType();
}
if (expectedResult is Byte[] expectedBytes)
{
m_Output.WriteLine($"EXPECTED={{ {String.Join(", ", expectedBytes.Select(x => x.ToString()))} }}");
}
else
{
Type expectedType = (Type)expectedResult;
m_Output.WriteLine($"EXPECTED={((expectedType == null) ? String.Empty : expectedType.Name)}");
}
if (actualResult is Byte[] actualBytes)
{
m_Output.WriteLine($"ACTUAL={{ {String.Join(", ", actualBytes.Select(x => x.ToString()))} }}");
}
else
{
Type actualType = (Type)actualResult;
m_Output.WriteLine($"ACTUAL={((actualType == null) ? String.Empty : actualType.Name)}");
}
Assert.Equal(expectedResult, actualResult);
}