108 lines
2.7 KiB
C++
108 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/* A class to handle flat file storage mechanism -Gagan Saksena 09/15/98 */
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#ifndef nsFlatFile_h__
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#define nsFlatFile_h__
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#include "prtypes.h"
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#include "prio.h"
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//#include "nsISupports.h"
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#ifdef IS_LITTLE_ENDIAN
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#ifndef COPY_INT32
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#define COPY_INT32(_a,_b) memcpy(_a, _b, sizeof(int32))
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#else
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#define COPY_INT32(_a,_b) /* swap */ \
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do { \
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((char *)(_a))[0] = ((char *)(_b))[3]; \
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((char *)(_a))[1] = ((char *)(_b))[2]; \
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((char *)(_a))[2] = ((char *)(_b))[1]; \
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((char *)(_a))[3] = ((char *)(_b))[0]; \
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} while(0)
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#endif
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#endif
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static const PRUint32 kPAGE_SIZE =4096;
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class nsFlatFile //: public nsISupports
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{
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public:
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nsFlatFile(const char* i_pFilename,
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const PRUint32 i_FileSize= 5242880); // 5 meg
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// TODO think if we want to substract the toc size from this?
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virtual ~nsFlatFile();
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const char* Filename(void) const;
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PRUint32 HeaderSize(void) const;
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void Init(void);
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PRBool IsValid(void) const;
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PRUint32 Size(void) const;
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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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protected:
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private:
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nsFlatFile(const nsFlatFile& o);
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nsFlatFile& operator=(const nsFlatFile& o);
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PRBool m_bIsValid;
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char* m_pFilename;
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PRUint32 m_Size;
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PRFileDesc* m_pFD;
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PRUint32 m_HeaderSize;
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};
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inline
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const char* nsFlatFile::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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PRUint32 nsFlatFile::HeaderSize(void) const
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{
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return m_HeaderSize;
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}
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inline
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PRBool nsFlatFile::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 nsFlatFile::Size(void) const
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{
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return m_Size;
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}
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#endif // nsFlatFile_h__
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