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/* -*- 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 <file/fcode.hxx>
#include <connectivity/FValue.hxx>
#include <memory>
#define NODE_NOTFOUND 0xFFFF
#define DINDEX_PAGE_SIZE 512
class SvStream;
namespace connectivity::dbase
{
class ONDXNode;
class ODbaseIndex;
// Index Key
typedef file::OOperand ONDXKey_BASE;
class ONDXKey : public ONDXKey_BASE
{
friend class ONDXNode;
sal_uInt32 nRecord; /* Record pointer */
ORowSetValue xValue; /* Key values */
public:
ONDXKey();
ONDXKey(ORowSetValue aVal, sal_Int32 eType, sal_uInt32 nRec);
ONDXKey(const OUString& aStr, sal_uInt32 nRec);
ONDXKey(double aVal, sal_uInt32 nRec);
inline ONDXKey(const ONDXKey& rKey);
inline ONDXKey& operator= (const ONDXKey& rKey);
virtual void setValue(const ORowSetValue& _rVal) override;
virtual const ORowSetValue& getValue() const override;
sal_uInt32 GetRecord() const { return nRecord; }
void setRecord(sal_uInt32 _nRec) { nRecord = _nRec; }
void ResetRecord() { nRecord = 0; }
bool operator == (const ONDXKey& rKey) const;
bool operator != (const ONDXKey& rKey) const;
bool operator < (const ONDXKey& rKey) const;
bool operator <= (const ONDXKey& rKey) const;
bool operator > (const ONDXKey& rKey) const;
static bool IsText(sal_Int32 eType);
private:
int Compare(const ONDXKey& rKey) const;
};
class ONDXPage;
// Index Page Pointer
// This is ref-count pointer class
class ONDXPagePtr
{
friend SvStream& WriteONDXPagePtr(SvStream &rStream, const ONDXPagePtr&);
friend SvStream& operator >> (SvStream &rStream, ONDXPagePtr&);
ONDXPage* mpPage;
sal_uInt32 nPagePos; // Position in the index file
public:
ONDXPagePtr();
ONDXPagePtr(ONDXPagePtr&& rObj) noexcept;
ONDXPagePtr(ONDXPagePtr const & rRef);
ONDXPagePtr(ONDXPage* pRefPage);
~ONDXPagePtr();
void Clear();
ONDXPagePtr& operator=(ONDXPagePtr const & rRef);
ONDXPagePtr& operator=(ONDXPagePtr && rRef);
bool Is() const { return mpPage != nullptr; }
ONDXPage * operator ->() const { assert(mpPage != nullptr); return mpPage; }
operator ONDXPage *() const { return mpPage; }
sal_uInt32 GetPagePos() const {return nPagePos;}
bool HasPage() const {return nPagePos != 0;}
};
// Index Page
// This is a ref-counted class, with re-cycling
class ONDXPage
{
friend class ODbaseIndex;
friend class ONDXPagePtr;
friend SvStream& WriteONDXPage(SvStream &rStream, const ONDXPage&);
friend SvStream& operator >> (SvStream &rStream, ONDXPage&);
// work around a clang 3.5 optimization bug: if the bNoDelete is *first*
// it mis-compiles "if (--nRefCount == 0)" and never deletes any object
unsigned int nRefCount : 31;
// the only reason this is not bool is because MSVC cannot handle mixed type bitfields
unsigned int bNoDelete : 1;
sal_uInt32 nPagePos; // Position in the index file
bool bModified : 1;
sal_uInt16 nCount;
ONDXPagePtr aParent, // Parent page
aChild; // Pointer to the right child page
ODbaseIndex& rIndex;
std::unique_ptr<ONDXNode[]>
ppNodes; // Array of nodes
public:
// Node operations
sal_uInt16 Count() const {return nCount;}
bool Insert(ONDXNode& rNode, sal_uInt32 nRowsLeft = 0);
bool Insert(sal_uInt16 nIndex, ONDXNode& rNode);
bool Append(ONDXNode& rNode);
void Delete(sal_uInt16);
void Remove(sal_uInt16);
void Release(bool bSave = true);
void ReleaseFull();
// Split and merge
ONDXNode Split(ONDXPage& rPage);
void Merge(sal_uInt16 nParentNodePos, const ONDXPagePtr& xPage);
// Access operators
ONDXNode& operator[] (sal_uInt16 nPos);
const ONDXNode& operator[] (sal_uInt16 nPos) const;
bool IsRoot() const;
bool IsLeaf() const;
bool IsModified() const;
bool HasParent() const;
bool IsFull() const;
sal_uInt32 GetPagePos() const {return nPagePos;}
ONDXPagePtr& GetChild(ODbaseIndex const * pIndex = nullptr);
// Parent does not need to be reloaded
const ONDXPagePtr& GetParent() const;
ODbaseIndex& GetIndex() {return rIndex;}
const ODbaseIndex& GetIndex() const {return rIndex;}
// Setting the child, via reference to retain the PagePos
void SetChild(ONDXPagePtr aCh);
void SetParent(ONDXPagePtr aPa);
sal_uInt16 Search(const ONDXKey& rSearch);
sal_uInt16 Search(const ONDXPage* pPage);
void SearchAndReplace(const ONDXKey& rSearch, ONDXKey const & rReplace);
protected:
ONDXPage(ODbaseIndex& rIndex, sal_uInt32 nPos, ONDXPage*);
~ONDXPage();
void ReleaseRef();
void QueryDelete();
void AddNextRef()
{
assert( nRefCount < (1 << 30) && "Do not add refs to dead objects" );
++nRefCount;
}
void AddFirstRef()
{
assert( nRefCount < (1 << 30) && "Do not add refs to dead objects" );
if( bNoDelete )
bNoDelete = 0;
++nRefCount;
}
void SetModified(bool bMod) {bModified = bMod;}
void SetPagePos(sal_uInt32 nPage) {nPagePos = nPage;}
bool Find(const ONDXKey&); // Descend recursively
sal_uInt16 FindPos(const ONDXKey& rKey) const;
#if OSL_DEBUG_LEVEL > 1
void PrintPage();
#endif
};
SvStream& WriteONDXPagePtr(SvStream &rStream, const ONDXPagePtr&);
SvStream& operator >> (SvStream &rStream, ONDXPagePtr&);
inline bool ONDXPage::IsRoot() const {return !aParent.Is();}
inline bool ONDXPage::IsLeaf() const {return !aChild.HasPage();}
inline bool ONDXPage::IsModified() const {return bModified;}
inline bool ONDXPage::HasParent() const {return aParent.Is();}
inline const ONDXPagePtr& ONDXPage::GetParent() const {return aParent;}
inline void ONDXPage::SetParent(ONDXPagePtr aPa = ONDXPagePtr())
{
aParent = aPa;
}
inline void ONDXPage::SetChild(ONDXPagePtr aCh = ONDXPagePtr())
{
aChild = aCh;
if (aChild.Is())
aChild->SetParent(this);
}
SvStream& operator >> (SvStream &rStream, ONDXPage& rPage);
SvStream& WriteONDXPage(SvStream &rStream, const ONDXPage& rPage);
// Index Node
class ONDXNode
{
friend class ONDXPage;
ONDXPagePtr aChild; /* Next page reference */
ONDXKey aKey;
public:
ONDXNode(){}
ONDXNode(const ONDXKey& rKey)
:aKey(rKey) {}
// Does the node point to a page?
bool HasChild() const {return aChild.HasPage();}
// If an index is provided, we may be able to retrieve the page
ONDXPagePtr& GetChild(ODbaseIndex* pIndex = nullptr, ONDXPage* = nullptr);
const ONDXKey& GetKey() const { return aKey;}
ONDXKey& GetKey() { return aKey;}
// Setting the child, via reference to retain the PagePos
void SetChild(ONDXPagePtr aCh = ONDXPagePtr(), ONDXPage* = nullptr);
void Write(SvStream &rStream, const ONDXPage& rPage) const;
void Read(SvStream &rStream, ODbaseIndex const &);
};
inline ONDXKey::ONDXKey(const ONDXKey& rKey)
: ONDXKey_BASE(rKey.getDBType())
,nRecord(rKey.nRecord)
,xValue(rKey.xValue)
{
}
inline ONDXKey& ONDXKey::operator=(const ONDXKey& rKey)
{
if(&rKey == this)
return *this;
xValue = rKey.xValue;
nRecord = rKey.nRecord;
m_eDBType = rKey.getDBType();
return *this;
}
inline bool ONDXKey::operator == (const ONDXKey& rKey) const
{
if(&rKey == this)
return true;
return Compare(rKey) == 0;
}
inline bool ONDXKey::operator != (const ONDXKey& rKey) const
{
return !operator== (rKey);
}
inline bool ONDXKey::operator < (const ONDXKey& rKey) const
{
return Compare(rKey) < 0;
}
inline bool ONDXKey::operator > (const ONDXKey& rKey) const
{
return Compare(rKey) > 0;
}
inline bool ONDXKey::operator <= (const ONDXKey& rKey) const
{
return !operator > (rKey);
}
inline void ONDXNode::SetChild(ONDXPagePtr aCh, ONDXPage* pParent)
{
aChild = aCh;
if (aChild.Is())
aChild->SetParent(pParent);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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