/// <summary>
/// Reads BSON binary data from the reader.
/// </summary>
/// <returns>A BsonBinaryData.</returns>
#pragma warning disable 618 // about obsolete BsonBinarySubType.OldBinary
public override BsonBinaryData ReadBinaryData()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadBinaryData", BsonType.Binary);
int size = ReadSize();
var subType = (BsonBinarySubType)_buffer.ReadByte();
if (subType == BsonBinarySubType.OldBinary)
{
// sub type OldBinary has two sizes (for historical reasons)
int size2 = ReadSize();
if (size2 != size - 4)
{
throw new FileFormatException("Binary sub type OldBinary has inconsistent sizes");
}
size = size2;
if (_binaryReaderSettings.FixOldBinarySubTypeOnInput)
{
subType = BsonBinarySubType.Binary; // replace obsolete OldBinary with new Binary sub type
}
}
var bytes = _buffer.ReadBytes(size);
var guidRepresentation = GuidRepresentation.Unspecified;
if (subType == BsonBinarySubType.UuidLegacy || subType == BsonBinarySubType.UuidStandard)
{
if (_binaryReaderSettings.GuidRepresentation != GuidRepresentation.Unspecified)
{
var expectedSubType = (_binaryReaderSettings.GuidRepresentation == GuidRepresentation.Standard) ? BsonBinarySubType.UuidStandard : BsonBinarySubType.UuidLegacy;
if (subType != expectedSubType)
{
var message = string.Format(
"The GuidRepresentation for the reader is {0}, which requires the binary sub type to be {1}, not {2}.",
_binaryReaderSettings.GuidRepresentation, expectedSubType, subType);
throw new FileFormatException(message);
}
}
guidRepresentation = (subType == BsonBinarySubType.UuidStandard) ? GuidRepresentation.Standard : _binaryReaderSettings.GuidRepresentation;
}
State = GetNextState();
return(new BsonBinaryData(bytes, subType, guidRepresentation));
}