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Diffstat (limited to 'connectivity/source/inc/dbase/DIndex.hxx')
| -rw-r--r-- | connectivity/source/inc/dbase/DIndex.hxx | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/connectivity/source/inc/dbase/DIndex.hxx b/connectivity/source/inc/dbase/DIndex.hxx new file mode 100644 index 000000000..cd18ded0c --- /dev/null +++ b/connectivity/source/inc/dbase/DIndex.hxx @@ -0,0 +1,139 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#pragma once + +#include <sdbcx/VIndex.hxx> +#include <dbase/DTable.hxx> +#include <dbase/dindexnode.hxx> + +inline constexpr OStringLiteral dBASE_III_GROUP = "dBase III"; + +namespace connectivity::dbase + { + class OIndexIterator; + class ONDXKey; + + typedef sdbcx::OIndex ODbaseIndex_BASE; + + class ODbaseIndex : public ODbaseIndex_BASE + { + friend SvStream& WriteODbaseIndex(SvStream &rStream, const ODbaseIndex&); + friend SvStream& operator >> (SvStream &rStream, ODbaseIndex&); + + friend class ONDXNode; + friend class ONDXPage; + friend class ONDXPagePtr; + friend class OIndexIterator; + + public: + + // Header struct - stays in memory + + struct NDXHeader + { + sal_uInt32 db_rootpage; /* Rootpage position */ + sal_uInt32 db_pagecount; /* Page count */ + sal_uInt8 db_free[4]; /* Reserved */ + sal_uInt16 db_keylen; /* Key length */ + sal_uInt16 db_maxkeys; /* Maximum number of keys per page */ + sal_uInt16 db_keytype; /* Type of key: + 0 = Text + 1 = Numerical */ + sal_uInt16 db_keyrec; /* Length of an index record + RecordNumber + keylen */ + sal_uInt8 db_free1[3]; /* Reserved */ + sal_uInt8 db_unique; /* Unique */ + char db_name[488]; /* index_name (field name) */ + }; + + private: + std::unique_ptr<SvStream> m_pFileStream; // Stream to read/write the index + NDXHeader m_aHeader = {}; + std::vector<ONDXPage*> + m_aCollector; // Pool of obsolete pages + ONDXPagePtr m_aRoot, // Root of the B+ tree + m_aCurLeaf; // Current leaf + sal_uInt16 m_nCurNode; // Position of the current node + + sal_uInt32 m_nPageCount, + m_nRootPage; + + ODbaseTable* m_pTable; + bool m_bUseCollector : 1; // Use the Garbage Collector + + OUString getCompletePath() const; + void closeImpl(); + // Closes and kills the index file and throws an error + void impl_killFileAndthrowError_throw(TranslateId pErrorId, const OUString& _sFile); + protected: + virtual ~ODbaseIndex() override; + public: + ODbaseIndex(ODbaseTable* _pTable); + ODbaseIndex(ODbaseTable* _pTable,const NDXHeader& _aHeader,const OUString& Name); + + void openIndexFile(); + virtual void refreshColumns() override; + + // css::lang::XUnoTunnel + virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override; + static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId(); + + const ODbaseTable* getTable() const { return m_pTable; } + const NDXHeader& getHeader() const { return m_aHeader; } + std::unique_ptr<OIndexIterator> createIterator(); + + void SetRootPos(sal_uInt32 nPos) {m_nRootPage = nPos;} + void SetPageCount(sal_uInt32 nCount) {m_nPageCount = nCount;} + + sal_uInt32 GetPageCount() const {return m_nPageCount;} + + sal_uInt16 GetMaxNodes() const {return m_aHeader.db_maxkeys;} + + bool Insert(sal_uInt32 nRec, const ORowSetValue& rValue); + bool Update(sal_uInt32 nRec, const ORowSetValue&, const ORowSetValue&); + bool Delete(sal_uInt32 nRec, const ORowSetValue& rValue); + bool Find(sal_uInt32 nRec, const ORowSetValue& rValue); + + void createINFEntry(); + void CreateImpl(); + void DropImpl(); + + DECLARE_SERVICE_INFO(); + protected: + + ONDXPage* CreatePage(sal_uInt32 nPagePos, ONDXPage* pParent = nullptr, bool bLoad = false); + void Collect(ONDXPage*); + ONDXPagePtr const & getRoot(); + + bool isUnique() const { return m_IsUnique; } + bool UseCollector() const {return m_bUseCollector;} + // Tree operations + void Release(bool bSave = true); + bool ConvertToKey(ONDXKey* rKey, sal_uInt32 nRec, const ORowSetValue& rValue); + }; + + SvStream& WriteODbaseIndex(SvStream &rStream, const ODbaseIndex&); + SvStream& operator >> (SvStream &rStream, ODbaseIndex&); + + void ReadHeader(SvStream & rStream, ODbaseIndex::NDXHeader & rHeader); +} + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |