protected override byte[] GetSegment()
{
short requested = (short)this.SegmentSize;
short segmentLength = 0;
lock (this.db)
{
int[] statusVector = FesConnection.GetNewStatusVector();
MemoryStream segment = new MemoryStream();
byte[] tmp = new byte[requested];
int status = FbClient.isc_get_segment(
statusVector,
ref this.blobHandle,
ref segmentLength,
requested,
tmp);
if (segmentLength > 0)
{
segment.Write(tmp, 0, segmentLength > requested ? requested : segmentLength);
}
this.RblRemoveValue(IscCodes.RBL_segment);
if (statusVector[1] == IscCodes.isc_segstr_eof)
{
segment.SetLength(0);
this.RblAddValue(IscCodes.RBL_eof_pending);
}
else
{
if (status == 0 || statusVector[1] == IscCodes.isc_segment)
{
this.RblAddValue(IscCodes.RBL_segment);
}
else
{
this.db.ParseStatusVector(statusVector);
}
}
return(segment.ToArray());
}
}