| public static ToUInt64 ( byte value, int startIndex ) : UInt64 | ||
| value | byte | |
| startIndex | int | |
| return | UInt64 | |
public UInt256(byte[] value)
{
if (value.Length > 32 && !(value.Length == 33 && value[32] == 0))
{
throw new ArgumentOutOfRangeException();
}
if (value.Length < 32)
{
value = value.Concat(new byte[32 - value.Length]);
}
// read LE parts in reverse order to store in BE
var part1Bytes = new byte[8];
var part2Bytes = new byte[8];
var part3Bytes = new byte[8];
var part4Bytes = new byte[8];
Buffer.BlockCopy(value, 0, part4Bytes, 0, 8);
Buffer.BlockCopy(value, 8, part3Bytes, 0, 8);
Buffer.BlockCopy(value, 16, part2Bytes, 0, 8);
Buffer.BlockCopy(value, 24, part1Bytes, 0, 8);
// convert parts and store
this.part1 = Bits.ToUInt64(part1Bytes);
this.part2 = Bits.ToUInt64(part2Bytes);
this.part3 = Bits.ToUInt64(part3Bytes);
this.part4 = Bits.ToUInt64(part4Bytes);
this.hashCode = this.part1.GetHashCode() ^ this.part2.GetHashCode() ^ this.part3.GetHashCode() ^ this.part4.GetHashCode();
}
private void InnerInit(byte[] buffer, int offset, out ulong[] parts, out int hashCode)
{
// convert parts and store
parts = new ulong[width];
offset += 32;
for (var i = 0; i < width; i++)
{
offset -= 8;
parts[i] = Bits.ToUInt64(buffer, offset);
}
InnerInit(out hashCode);
}
