private byte[] RemoveLastDocument(Stream stream)
{
var streamReader = new BsonStreamReader(stream, WriterSettings.Encoding);
var lastDocumentLength = (int)streamReader.Position - _lastDocumentStartPosition;
streamReader.Position = _lastDocumentStartPosition;
var lastDocument = streamReader.ReadBytes(lastDocumentLength);
streamReader.Position = _lastDocumentStartPosition;
streamReader.BaseStream.SetLength(_lastDocumentStartPosition);
_batchCount -= 1;
_batchLength = (int)streamReader.Position - _batchStartPosition;
return(lastDocument);
}
private IByteBuffer RemoveOverflow(Stream stream)
{
var streamReader = new BsonStreamReader(stream, Utf8Helper.StrictUtf8Encoding);
var lastRequestLength = (int)stream.Position - _lastRequestPosition;
stream.Position = _lastRequestPosition;
var lastArrayItem = streamReader.ReadBytes(lastRequestLength);
if ((BsonType)lastArrayItem[0] != BsonType.Document)
{
throw new MongoInternalException("Expected overflow item to be a BsonDocument.");
}
var sliceOffset = Array.IndexOf <byte>(lastArrayItem, 0) + 1; // skip over type and array index
var overflow = new ByteArrayBuffer(lastArrayItem, sliceOffset, lastArrayItem.Length - sliceOffset, true);
stream.Position = _lastRequestPosition;
stream.SetLength(_lastRequestPosition);
_batchCount--;
_batchLength = (int)stream.Position - _batchStartPosition;
return(overflow);
}