public void WriteBlock(Span <byte> memoryToFill)
{
var lastKey = new ReadOnlySpan <byte>();
var span = memoryToFill;
do
{
var key = _iterator.Current.Key;
var value = _iterator.Current.Value;
var lengthNeeded = (sizeof(int) * 2) + key.Length + value.Length;
if (span.Length < lengthNeeded)
{
span.Fill(0);
_moreToWrite = true;
return;
}
_count++;
_filter.AddKey(key);
BinaryPrimitives.WriteInt32LittleEndian(span, key.Length);
span = span[sizeof(int)..];