private static BloomExtract GetExtract(byte[] sequence)
{
int GetIndex(Span <byte> bytes, int index1, int index2)
{
return(2047 - ((bytes[index1] << 8) + bytes[index2]) % 2048);
}
var keccakBytes = ValueKeccak.Compute(sequence).BytesAsSpan;
var indexes = new BloomExtract(GetIndex(keccakBytes, 0, 1), GetIndex(keccakBytes, 2, 3), GetIndex(keccakBytes, 4, 5));
return(indexes);
}
private void Set(byte[] sequence, Bloom masterBloom)
{
if (ReferenceEquals(this, Empty))
{
throw new InvalidOperationException("An attempt was made to update Bloom.Empty constant");
}
BloomExtract indexes = GetExtract(sequence);
Set(indexes.Index1);
Set(indexes.Index2);
Set(indexes.Index3);
if (masterBloom != null)
{
masterBloom.Set(indexes.Index1);
masterBloom.Set(indexes.Index2);
masterBloom.Set(indexes.Index3);
}
}
public bool Matches(byte[] sequence)
{
BloomExtract indexes = GetExtract(sequence);
return(Matches(ref indexes));
}
public bool Matches(BloomExtract extract) => Matches(ref extract);
public bool Matches(ref BloomExtract extract) => Get(extract.Index1) && Get(extract.Index2) && Get(extract.Index3);
public bool Matches(ref BloomExtract extract) => _bits[extract.Index1] && _bits[extract.Index2] && _bits[extract.Index3];
