Renamed version4 to flaim and version5 to xflaim
git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@7 0109f412-320b-0410-ab79-c3e0c5ffbbe6
This commit is contained in:
dsandersoremutah
905
xflaim/src/fsdatacu.cpp
Normal file
905
xflaim/src/fsdatacu.cpp
Normal file
@@ -0,0 +1,905 @@
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//------------------------------------------------------------------------------
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// Desc: Cursor routines to get the complexity of the file system out
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// of the search code.
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//
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// Tabs: 3
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//
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// Copyright (c) 2000-2006 Novell, Inc. All Rights Reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, contact Novell, Inc.
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//
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// To contact Novell about this file by physical or electronic mail,
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// you may find current contact information at www.novell.com
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//
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// $Id: fsdatacu.cpp 3114 2006-01-19 13:22:45 -0700 (Thu, 19 Jan 2006) dsanders $
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//------------------------------------------------------------------------------
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#include "flaimsys.h"
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#include "fscursor.h"
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/****************************************************************************
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Desc:
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****************************************************************************/
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FSCollectionCursor::FSCollectionCursor()
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{
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m_pbTree = NULL;
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m_bTreeOpen = FALSE;
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m_pCollection = NULL;
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m_bDocumentIds = FALSE;
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m_pLFile = NULL;
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m_pDb = NULL;
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m_eTransType = XFLM_NO_TRANS;
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resetCursor();
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}
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/****************************************************************************
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Desc:
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****************************************************************************/
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FSCollectionCursor::~FSCollectionCursor()
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{
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closeBTree();
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if (m_pbTree)
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{
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gv_XFlmSysData.pBtPool->btpReturnBtree( &m_pbTree);
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}
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}
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/****************************************************************************
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Desc: Resets any allocations, keys, state, etc.
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****************************************************************************/
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void FSCollectionCursor::resetCursor( void)
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{
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closeBTree();
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m_uiCollection = 0;
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m_bDocumentIds = FALSE;
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m_uiBlkChangeCnt = 0;
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m_ui64CurrTransId = 0;
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m_ui64CurNodeId = 0;
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m_bAtBOF = TRUE;
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m_bAtEOF = FALSE;
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m_bSetup = FALSE;
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}
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/****************************************************************************
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Desc: Resets to a new transaction that may change the read consistency of
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the query.
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****************************************************************************/
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RCODE FSCollectionCursor::resetTransaction(
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F_Db * pDb)
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{
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RCODE rc = NE_XFLM_OK;
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F_COLLECTION * pCollection;
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if (RC_BAD( rc = pDb->m_pDict->getCollection( m_uiCollection,
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&pCollection)))
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{
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goto Exit;
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}
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if (pCollection != m_pCollection)
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{
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m_pCollection = pCollection;
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m_pLFile = &pCollection->lfInfo;
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if (m_bTreeOpen)
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{
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closeBTree();
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}
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m_pDb = pDb;
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m_eTransType = pDb->m_eTransType;
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}
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m_ui64CurrTransId = pDb->m_ui64CurrTransID;
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m_uiBlkChangeCnt = pDb->m_uiBlkChangeCnt;
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Exit:
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return( rc);
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}
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/****************************************************************************
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Desc: Open the F_Btree object if not already open.
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****************************************************************************/
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RCODE FSCollectionCursor::openBTree(
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F_Db * pDb
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)
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{
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RCODE rc = NE_XFLM_OK;
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if (!m_bTreeOpen)
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{
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if (!m_pbTree)
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{
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if (RC_BAD( rc = gv_XFlmSysData.pBtPool->btpReserveBtree( &m_pbTree)))
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{
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goto Exit;
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}
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}
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Open_Btree:
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if (RC_BAD( rc = m_pbTree->btOpen( pDb, m_pLFile, FALSE, FALSE)))
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{
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goto Exit;
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}
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m_bTreeOpen = TRUE;
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m_pDb = pDb;
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m_eTransType = pDb->m_eTransType;
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}
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else
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{
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if (pDb != m_pDb || pDb->m_eTransType != m_eTransType)
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{
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closeBTree();
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goto Open_Btree;
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}
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}
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Exit:
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return( rc);
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}
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/****************************************************************************
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Desc: Set the node position.
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****************************************************************************/
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RCODE FSCollectionCursor::setNodePosition(
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F_Db * pDb,
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FLMBOOL bGoingForward,
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FLMUINT64 ui64NodeId,
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FLMUINT64 * pui64FoundNodeId,
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F_Btree * pBTree // BTree to use. NULL means use our
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// internal one.
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)
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{
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RCODE rc = NE_XFLM_OK;
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FLMBYTE ucKey [FLM_MAX_NUM_BUF_SIZE];
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FLMUINT uiKeyLen;
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FLMBOOL bNeg;
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FLMUINT uiBytesProcessed;
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FLMUINT64 ui64TmpNodeId;
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IF_DOMNode * pNode = NULL;
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// if pBTree is NULL, we are to use m_pbTree. Otherwise, we
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// need to open the pBTree and use it.
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if (!pBTree)
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{
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if (RC_BAD( rc = openBTree( pDb)))
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{
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goto Exit;
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}
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pBTree = m_pbTree;
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}
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uiKeyLen = sizeof( ucKey);
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if (RC_BAD( rc = flmNumber64ToStorage( ui64NodeId, &uiKeyLen,
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ucKey, FALSE, TRUE)))
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{
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goto Exit;
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}
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if (RC_BAD( rc = pBTree->btLocateEntry(
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ucKey, sizeof( ucKey), &uiKeyLen, XFLM_INCL)))
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{
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if (rc != NE_XFLM_EOF_HIT)
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{
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goto Exit;
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||||
}
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}
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if (bGoingForward)
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{
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if (rc == NE_XFLM_EOF_HIT)
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{
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goto Exit;
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}
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}
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else
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{
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// Going backwards or to last. See if we positioned too far.
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if (rc == NE_XFLM_BOF_HIT || rc == NE_XFLM_EOF_HIT)
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{
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// Position to last key in tree.
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if (RC_BAD( rc = pBTree->btLastEntry( ucKey, sizeof( ucKey),
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&uiKeyLen,
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NULL, NULL, NULL)))
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{
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goto Exit;
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}
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}
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else
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{
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if (RC_BAD( rc = flmCollation2Number( uiKeyLen, ucKey,
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&ui64TmpNodeId, &bNeg, &uiBytesProcessed)))
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{
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goto Exit;
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}
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if (ui64TmpNodeId > ui64NodeId)
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{
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// Position to the previous key.
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if (RC_BAD( rc = pBTree->btPrevEntry( ucKey, sizeof( ucKey),
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&uiKeyLen, NULL, NULL, NULL)))
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{
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goto Exit;
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}
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}
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}
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}
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if (!m_bDocumentIds)
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{
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if (RC_BAD( rc = flmCollation2Number( uiKeyLen, ucKey,
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pui64FoundNodeId, &bNeg, &uiBytesProcessed)))
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{
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goto Exit;
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}
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}
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else
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{
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// Need to position to a document ID if we are looking only for document
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// root nodes.
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for (;;)
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{
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if (RC_BAD( rc = flmCollation2Number( uiKeyLen, ucKey,
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&ui64TmpNodeId, &bNeg, &uiBytesProcessed)))
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{
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goto Exit;
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}
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// The following code tests to see if we have gone past the
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// from or until node id. It is an optimization that isn't
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// actually necessary for the code to work properly, because
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// the outside code also makes this check. This just allows
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// us to quit earlier than we otherwise might while looking
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// for a document root node.
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if (bGoingForward)
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{
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// If we have gone past the until node id, we are done.
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if (ui64TmpNodeId > m_ui64UntilNodeId)
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{
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rc = RC_SET( NE_XFLM_EOF_HIT);
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goto Exit;
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}
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}
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else
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{
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// If we have gone past the from node id, we are done.
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if (ui64TmpNodeId < m_ui64FromNodeId)
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{
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rc = RC_SET( NE_XFLM_BOF_HIT);
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goto Exit;
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}
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}
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if (RC_BAD( rc = pDb->getNode( m_uiCollection, ui64TmpNodeId, &pNode)))
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{
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if (rc == NE_XFLM_DOM_NODE_NOT_FOUND)
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{
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||||
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// Better be able to find the node at this point!
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rc = RC_SET_AND_ASSERT( NE_XFLM_DATA_ERROR);
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goto Exit;
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}
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}
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// If the node is a root node, we have a document we can
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// process.
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if (((F_DOMNode *)pNode)->isRootNode())
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{
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*pui64FoundNodeId = ui64TmpNodeId;
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break;
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}
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||||
// Need to go to the next or previous node.
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if (bGoingForward)
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{
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if (RC_BAD( rc = pBTree->btNextEntry( ucKey, uiKeyLen, &uiKeyLen)))
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||||
{
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||||
goto Exit;
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||||
}
|
||||
}
|
||||
else
|
||||
{
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||||
if (RC_BAD( rc = pBTree->btPrevEntry( ucKey, uiKeyLen, &uiKeyLen)))
|
||||
{
|
||||
goto Exit;
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||||
}
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||||
}
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||||
}
|
||||
}
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||||
|
||||
Exit:
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||||
|
||||
if (RC_BAD( rc))
|
||||
{
|
||||
if (pBTree == m_pbTree)
|
||||
{
|
||||
closeBTree();
|
||||
}
|
||||
}
|
||||
if (pNode)
|
||||
{
|
||||
pNode->Release();
|
||||
}
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Setup the from and until keys in the cursor. Return counts
|
||||
after positioning to the from and until key in the index.
|
||||
This code does not work with multiple key sets of FROM/UNTIL keys.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::setupRange(
|
||||
F_Db * pDb,
|
||||
FLMUINT uiCollection,
|
||||
FLMBOOL bDocumentIds,
|
||||
FLMUINT64 ui64LowNodeId,
|
||||
FLMUINT64 ui64HighNodeId,
|
||||
FLMUINT * puiLeafBlocksBetween,// [out] blocks between the stacks
|
||||
FLMUINT * puiTotalNodes, // [out]
|
||||
FLMBOOL * pbTotalsEstimated) // [out] set to TRUE when estimating.
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
F_Btree * pUntilBTree = NULL;
|
||||
|
||||
m_bAtBOF = TRUE;
|
||||
m_bAtEOF = FALSE;
|
||||
m_uiCollection = uiCollection;
|
||||
m_bDocumentIds = bDocumentIds;
|
||||
if (RC_BAD( rc = checkTransaction( pDb)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
m_ui64FromNodeId = ui64LowNodeId;
|
||||
m_ui64UntilNodeId = ui64HighNodeId;
|
||||
m_bSetup = TRUE;
|
||||
m_ui64CurNodeId = 0;
|
||||
|
||||
// Want any of the counts back?
|
||||
|
||||
if (puiLeafBlocksBetween || puiTotalNodes)
|
||||
{
|
||||
if (puiLeafBlocksBetween)
|
||||
{
|
||||
*puiLeafBlocksBetween = 0;
|
||||
}
|
||||
if (puiTotalNodes)
|
||||
{
|
||||
*puiTotalNodes = 0;
|
||||
}
|
||||
if (pbTotalsEstimated)
|
||||
{
|
||||
*pbTotalsEstimated = FALSE;
|
||||
}
|
||||
|
||||
// Position to the FROM and UNTIL key so we can get the stats.
|
||||
|
||||
if (RC_BAD( rc = setNodePosition( pDb, TRUE,
|
||||
m_ui64FromNodeId, &m_ui64CurNodeId, NULL)))
|
||||
{
|
||||
if (rc == NE_XFLM_EOF_HIT)
|
||||
{
|
||||
rc = NE_XFLM_OK;
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// All nodes between FROM and UNTIL may be gone.
|
||||
|
||||
if (m_ui64CurNodeId < m_ui64UntilNodeId)
|
||||
{
|
||||
FLMUINT64 ui64TmpNodeId;
|
||||
|
||||
// Get a btree object
|
||||
|
||||
if (RC_BAD( rc = gv_XFlmSysData.pBtPool->btpReserveBtree(
|
||||
&pUntilBTree)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (RC_BAD( rc = pUntilBTree->btOpen( pDb, m_pLFile,
|
||||
FALSE, FALSE)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// We better be able to at least find m_ui64CurNodeId going
|
||||
// backward from m_ui64UntilNodeId.
|
||||
|
||||
if (RC_BAD( rc = setNodePosition( pDb, FALSE,
|
||||
m_ui64UntilNodeId, &ui64TmpNodeId, pUntilBTree)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (RC_BAD( rc = m_pbTree->btComputeCounts( pUntilBTree,
|
||||
puiLeafBlocksBetween, puiTotalNodes,
|
||||
pbTotalsEstimated,
|
||||
(pDb->m_pDatabase->m_uiBlockSize * 3) / 4)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
if (pUntilBTree)
|
||||
{
|
||||
gv_XFlmSysData.pBtPool->btpReturnBtree( &pUntilBTree);
|
||||
}
|
||||
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Return the current node.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::currentNode(
|
||||
F_Db * pDb,
|
||||
IF_DOMNode ** ppNode,
|
||||
FLMUINT64 * pui64NodeId
|
||||
)
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
|
||||
if (RC_BAD( rc = checkTransaction( pDb)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (m_bAtBOF)
|
||||
{
|
||||
rc = RC_SET( NE_XFLM_BOF_HIT);
|
||||
goto Exit;
|
||||
}
|
||||
if (m_bAtEOF)
|
||||
{
|
||||
rc = RC_SET( NE_XFLM_EOF_HIT);
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
flmAssert( m_ui64CurNodeId);
|
||||
|
||||
if (RC_BAD( rc = populateNode( pDb, ppNode, pui64NodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Make sure the current node is positioned in the range for the cursor.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::checkIfNodeInRange(
|
||||
FLMBOOL bPositionForward)
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
|
||||
if (bPositionForward)
|
||||
{
|
||||
if (m_ui64CurNodeId > m_ui64UntilNodeId)
|
||||
{
|
||||
m_bAtEOF = TRUE;
|
||||
rc = RC_SET( NE_XFLM_EOF_HIT);
|
||||
goto Exit;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (m_ui64CurNodeId < m_ui64FromNodeId)
|
||||
{
|
||||
m_bAtBOF = TRUE;
|
||||
rc = RC_SET( NE_XFLM_BOF_HIT);
|
||||
goto Exit;
|
||||
}
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Position to and return the first node.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::firstNode(
|
||||
F_Db * pDb,
|
||||
IF_DOMNode ** ppNode,
|
||||
FLMUINT64 * pui64NodeId
|
||||
)
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
|
||||
if( RC_BAD( rc = checkTransaction( pDb)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
flmAssert( m_bSetup);
|
||||
|
||||
// If at BOF and we have a node, then we are positioned on the first
|
||||
// node already - this would have happened if we had positioned to
|
||||
// calculate a cost. Rather than do the positioning again, we simply
|
||||
// set m_bAtBOF to FALSE.
|
||||
|
||||
if (m_bAtBOF && m_ui64CurNodeId)
|
||||
{
|
||||
m_bAtBOF = FALSE;
|
||||
}
|
||||
else
|
||||
{
|
||||
m_bAtBOF = m_bAtEOF = FALSE;
|
||||
if (RC_BAD( rc = setNodePosition( pDb, TRUE, m_ui64FromNodeId,
|
||||
&m_ui64CurNodeId, NULL)))
|
||||
{
|
||||
if (rc == NE_XFLM_EOF_HIT)
|
||||
{
|
||||
m_bAtEOF = TRUE;
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
}
|
||||
|
||||
// Make sure the current node ID is within the FROM/UNTIL range.
|
||||
|
||||
if (RC_BAD( rc = checkIfNodeInRange( TRUE)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (RC_BAD( rc = populateNode( pDb, ppNode, pui64NodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
if (RC_BAD( rc))
|
||||
{
|
||||
m_ui64CurNodeId = 0;
|
||||
}
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Position to the next node.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::nextNode(
|
||||
F_Db * pDb,
|
||||
IF_DOMNode ** ppNode,
|
||||
FLMUINT64 * pui64NodeId
|
||||
)
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
IF_DOMNode * pNode = NULL;
|
||||
|
||||
if (RC_BAD( rc = checkTransaction( pDb)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
flmAssert( m_bSetup);
|
||||
if (m_bAtEOF)
|
||||
{
|
||||
rc = RC_SET( NE_XFLM_EOF_HIT);
|
||||
goto Exit;
|
||||
}
|
||||
if (m_bAtBOF || !m_ui64CurNodeId)
|
||||
{
|
||||
rc = firstNode( pDb, ppNode, pui64NodeId);
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
if (m_bDocumentIds)
|
||||
{
|
||||
if (RC_BAD( rc = pDb->getNode( m_uiCollection, m_ui64CurNodeId,
|
||||
&pNode)))
|
||||
{
|
||||
if (rc == NE_XFLM_DOM_NODE_NOT_FOUND)
|
||||
{
|
||||
rc = NE_XFLM_OK;
|
||||
|
||||
// Allow to just fall through to below and call setNodePosition.
|
||||
}
|
||||
else
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
}
|
||||
else if (((F_DOMNode *)pNode)->isRootNode())
|
||||
{
|
||||
if (RC_BAD( rc = pNode->getNextDocument( pDb, &pNode)))
|
||||
{
|
||||
if (rc == NE_XFLM_DOM_NODE_NOT_FOUND)
|
||||
{
|
||||
rc = NE_XFLM_EOF_HIT;
|
||||
m_bAtEOF = TRUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if( RC_BAD( rc = pNode->getNodeId( m_pDb, &m_ui64CurNodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
if (RC_OK( rc = checkIfNodeInRange( TRUE)))
|
||||
{
|
||||
if (pui64NodeId)
|
||||
{
|
||||
*pui64NodeId = m_ui64CurNodeId;
|
||||
}
|
||||
if (ppNode)
|
||||
{
|
||||
if (*ppNode)
|
||||
{
|
||||
(*ppNode)->Release();
|
||||
}
|
||||
*ppNode = pNode;
|
||||
pNode = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
// Fall through to below to call setNodePosition.
|
||||
}
|
||||
|
||||
// Get the next node, if any
|
||||
|
||||
if (m_ui64CurNodeId == ~((FLMUINT64)0))
|
||||
{
|
||||
rc = RC_SET( NE_XFLM_EOF_HIT);
|
||||
m_bAtEOF = TRUE;
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// See if we need to reset the b-tree object we are using
|
||||
|
||||
if (m_bTreeOpen &&
|
||||
(pDb != m_pDb || pDb->m_eTransType != m_eTransType))
|
||||
{
|
||||
closeBTree();
|
||||
}
|
||||
|
||||
if (RC_BAD( rc = setNodePosition( pDb, TRUE,
|
||||
m_ui64CurNodeId + 1, &m_ui64CurNodeId, NULL)))
|
||||
{
|
||||
if (rc == NE_XFLM_EOF_HIT)
|
||||
{
|
||||
m_bAtEOF = TRUE;
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// Make sure the current node ID is within the FROM/UNTIL range.
|
||||
|
||||
if (RC_BAD( rc = checkIfNodeInRange( TRUE)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (RC_BAD( rc = populateNode( pDb, ppNode, pui64NodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
if (pNode)
|
||||
{
|
||||
pNode->Release();
|
||||
}
|
||||
|
||||
if (RC_BAD( rc))
|
||||
{
|
||||
m_ui64CurNodeId = 0;
|
||||
}
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Position to and return the last node.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::lastNode(
|
||||
F_Db * pDb,
|
||||
IF_DOMNode ** ppNode,
|
||||
FLMUINT64 * pui64NodeId
|
||||
)
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
|
||||
if( RC_BAD( rc = checkTransaction( pDb)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
flmAssert( m_bSetup);
|
||||
|
||||
// Position to the until node
|
||||
|
||||
m_bAtBOF = m_bAtEOF = FALSE;
|
||||
if (RC_BAD( rc = setNodePosition( pDb, FALSE, m_ui64UntilNodeId,
|
||||
&m_ui64CurNodeId, NULL)))
|
||||
{
|
||||
if (rc == NE_XFLM_BOF_HIT)
|
||||
{
|
||||
m_bAtBOF = TRUE;
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// Make sure the current node ID is within the FROM/UNTIL range.
|
||||
|
||||
if (RC_BAD( rc = checkIfNodeInRange( FALSE)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (RC_BAD( rc = populateNode( pDb, ppNode, pui64NodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
if (RC_BAD( rc))
|
||||
{
|
||||
m_ui64CurNodeId = 0;
|
||||
}
|
||||
return( rc);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
Desc: Position to the previous node.
|
||||
****************************************************************************/
|
||||
RCODE FSCollectionCursor::prevNode(
|
||||
F_Db * pDb,
|
||||
IF_DOMNode ** ppNode,
|
||||
FLMUINT64 * pui64NodeId
|
||||
)
|
||||
{
|
||||
RCODE rc = NE_XFLM_OK;
|
||||
IF_DOMNode * pNode = NULL;
|
||||
|
||||
if (RC_BAD( rc = checkTransaction( pDb)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
flmAssert( m_bSetup);
|
||||
if (m_bAtBOF)
|
||||
{
|
||||
rc = RC_SET( NE_XFLM_BOF_HIT);
|
||||
goto Exit;
|
||||
}
|
||||
if (m_bAtEOF || !m_ui64CurNodeId)
|
||||
{
|
||||
rc = lastNode( pDb, ppNode, pui64NodeId);
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
if (m_bDocumentIds)
|
||||
{
|
||||
if (RC_BAD( rc = pDb->getNode( m_uiCollection, m_ui64CurNodeId,
|
||||
&pNode)))
|
||||
{
|
||||
if (rc == NE_XFLM_DOM_NODE_NOT_FOUND)
|
||||
{
|
||||
rc = NE_XFLM_OK;
|
||||
|
||||
// Allow to just fall through to below and call setNodePosition.
|
||||
}
|
||||
else
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
}
|
||||
else if (((F_DOMNode *)pNode)->isRootNode())
|
||||
{
|
||||
if (RC_BAD( rc = pNode->getPreviousDocument( pDb, &pNode)))
|
||||
{
|
||||
if (rc == NE_XFLM_DOM_NODE_NOT_FOUND)
|
||||
{
|
||||
rc = NE_XFLM_BOF_HIT;
|
||||
m_bAtBOF = TRUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if( RC_BAD( rc = pNode->getNodeId( m_pDb, &m_ui64CurNodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
if (RC_OK( rc = checkIfNodeInRange( FALSE)))
|
||||
{
|
||||
if (pui64NodeId)
|
||||
{
|
||||
*pui64NodeId = m_ui64CurNodeId;
|
||||
}
|
||||
if (ppNode)
|
||||
{
|
||||
if (*ppNode)
|
||||
{
|
||||
(*ppNode)->Release();
|
||||
}
|
||||
*ppNode = pNode;
|
||||
pNode = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
// Fall through to below to call setNodePosition.
|
||||
}
|
||||
|
||||
// Get the previous node, if any
|
||||
|
||||
if (m_ui64CurNodeId == 1)
|
||||
{
|
||||
rc = RC_SET( NE_XFLM_BOF_HIT);
|
||||
m_bAtBOF = TRUE;
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// See if we need to reset the b-tree object we are using
|
||||
|
||||
if (m_bTreeOpen &&
|
||||
(pDb != m_pDb || pDb->m_eTransType != m_eTransType))
|
||||
{
|
||||
closeBTree();
|
||||
}
|
||||
|
||||
if (RC_BAD( rc = setNodePosition( pDb, FALSE,
|
||||
m_ui64CurNodeId - 1, &m_ui64CurNodeId, NULL)))
|
||||
{
|
||||
if (rc == NE_XFLM_BOF_HIT)
|
||||
{
|
||||
m_bAtBOF = TRUE;
|
||||
}
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
// Make sure the current node ID is within the FROM/UNTIL range.
|
||||
|
||||
if (RC_BAD( rc = checkIfNodeInRange( FALSE)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
if (RC_BAD( rc = populateNode( pDb, ppNode, pui64NodeId)))
|
||||
{
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
Exit:
|
||||
|
||||
if (pNode)
|
||||
{
|
||||
pNode->Release();
|
||||
}
|
||||
|
||||
if (RC_BAD( rc))
|
||||
{
|
||||
m_ui64CurNodeId = 0;
|
||||
}
|
||||
return( rc);
|
||||
}
|
||||
Reference in New Issue
Block a user