Method get_array

src/jrd/blb.cpp:591–624

blb* blb::get_array(thread_db* tdbb, jrd_tra* transaction, const bid* blob_id,
				   Ods::InternalArrayDesc* desc)
{
/**************************************
 *
 *      b l b : : g e t _ a r r a y
 *
 **************************************
 *
 * Functional description
 *      Get array blob and array descriptor.
 *
 **************************************/
	transaction = transaction->getOuter();

	SET_TDBB(tdbb);

	blb* blob = open2(tdbb, transaction, blob_id, 0, 0);

	if (blob->blb_length < sizeof(Ods::InternalArrayDesc))
	{
		blob->BLB_close(tdbb);
		IBERROR(193);			// msg 193 null or invalid array
	}

	blob->BLB_get_segment(tdbb, reinterpret_cast<UCHAR*>(desc), sizeof(Ods::InternalArrayDesc));

	const USHORT n = desc->iad_length - sizeof(Ods::InternalArrayDesc);
	if (n) {
		blob->BLB_get_segment(tdbb, reinterpret_cast<UCHAR*>(desc) + sizeof(Ods::InternalArrayDesc), n);
	}

	return blob;
}


ULONG blb::BLB_get_data(thread_db* tdbb, UCHAR* buffer, SLONG length, bool close)