118 lines
2.7 KiB
C++
118 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/* This is the TOC or the Table of Contents for the flat file. This class
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* is part of the flat file cache architecture. The first entry in the TOC
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* is reserved for the list of free objects.
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* -Gagan Saksena 09/15/98
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*/
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#ifndef nsTOC_h__
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#define nsTOC_h__
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//#include "nsISupports.h"
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#include "nsFlatFile.h"
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#include "nsFFEntry.h"
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class nsTOC//: public nsISupports
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{
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public:
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nsTOC(const char* i_pFilename, nsFlatFile* i_pFlatFile);
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virtual ~nsTOC();
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/*
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NS_IMETHOD QueryInterface(const nsIID& aIID,
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void** aInstancePtr);
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NS_IMETHOD_(nsrefcnt) AddRef(void);
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NS_IMETHOD_(nsrefcnt) Release(void);
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*/
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nsFFEntry* AddEntry(PRUint32 i_size = kPAGE_SIZE);
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PRUint32 Entries(void) const;
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const char* Filename(void) const;
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nsFFEntry* FirstDataEntry(void) const;
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nsFFEntry* FreeEntry(void) const;
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void Init(void);
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PRBool IsValid(void) const;
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protected:
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PRUint32 NextID(void) const;
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PRBool Serialize(nsFFEntry* io_Entry, PRBool bRead = PR_FALSE);
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private:
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nsTOC(const nsTOC& o);
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nsTOC& operator=(const nsTOC& o);
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nsFFEntry* m_pContents; // The first entry is reserved for free space list
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PRUint32 m_Entries;
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char* m_pFilename;
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nsFlatFile* m_pFlatFile;
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PRFileDesc* m_pFD;
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PRBool m_bIsValid;
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};
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inline
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PRUint32 nsTOC::Entries(void) const
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{
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return m_Entries;
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}
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inline
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const char* nsTOC::Filename(void) const
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{
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return m_pFilename;
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}
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inline
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nsFFEntry* nsTOC::FirstDataEntry(void) const
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{
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return m_pContents ? m_pContents->NextEntry() : 0;
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}
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inline
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nsFFEntry* nsTOC::FreeEntry(void) const
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{
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return m_pContents;
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}
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inline
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PRBool nsTOC::IsValid(void) const
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{
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return m_bIsValid;
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}
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inline
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PRUint32 nsTOC::NextID(void) const
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{
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return m_Entries + 1;
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}
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#endif // nsTOC_h__
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