private static uint Adjust(IUniformRandomBitGenerator generator, uint upperBoundary)
{
if (generator == null)
{
throw new ArgumentNullException(nameof(generator));
}
if (upperBoundary == 0)
{
return(0);
}
if (upperBoundary == uint.MaxValue)
{
return(generator.Next32Bits());
}
++upperBoundary;
var numBuckets = ulong.MaxValue / upperBoundary;
var limit = numBuckets * upperBoundary;
ulong sample;
do
{
sample = generator.Next64Bits();
}while (sample >= limit);
return((uint)(sample / numBuckets));
}
public static int Next(IUniformRandomBitGenerator generator, int lowerBound, int upperBound) => (int)Adjust(generator, (uint)(upperBound - lowerBound)) + lowerBound;
public static double Next(IUniformRandomBitGenerator generator)
{
var entropy = mMask | (generator.Next64Bits() >> 12);
return(BitConverter.Int64BitsToDouble((long)entropy) - 1.0);
}
public int NextInt(IUniformRandomBitGenerator generator) => (int)Adjust(Generator, Delta) + LowerBound;
public double NextDouble(IUniformRandomBitGenerator generator) => Next(generator);
