104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
/**
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* \file ZipMemFile.h
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* Interface for the CZipMemFile class.
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*
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* \author Tadeusz Dracz
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*/
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// Part of the ZipArchive library
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//
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// Copyright (C) 2000 - 2001 Tadeusz Dracz.
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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 the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// For the licensing details see the file License.txt
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////////////////////////////////////////////////////////////////////////////////
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#if !defined(AFX_ZIPMEMFILE_H__EA73AB25_6B51_4C5E_8D78_BAC95812598F__INCLUDED_)
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#define AFX_ZIPMEMFILE_H__EA73AB25_6B51_4C5E_8D78_BAC95812598F__INCLUDED_
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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#include "zipabstractfile.h"
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#include "zipstring.h"
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/**
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A memory buffer which behaves like a physical file.
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Automatically grows when necessary
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*/
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ZEXPORT class CZipMemFile : public CZipAbstractFile
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{
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protected:
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UINT m_nGrowBy, m_nPos;
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UINT m_nBufSize, m_nDataSize;
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BYTE* m_lpBuf;
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bool m_bAutoDelete;
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void Free()
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{
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if (m_lpBuf)
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{
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free(m_lpBuf);
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m_lpBuf = NULL;
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}
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}
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void Init()
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{
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m_nGrowBy = m_nPos = 0;
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m_nBufSize = m_nDataSize = 0;
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m_lpBuf = NULL;
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}
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void Grow(long nBytes);
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public:
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bool IsClosed() { return m_lpBuf == NULL;}
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void Flush(){}
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long Seek(long lOff, int nFrom);
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DWORD GetLength() {return m_nDataSize;}
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void Write(const void* lpBuf, UINT nCount);
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UINT Read(void* lpBuf, UINT nCount);
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void SetLength(long nNewLen);
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CZipString GetFilePath() {return _T("");}
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bool Open(LPCTSTR lpszFileName, UINT openFlags, bool shareMode);
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CZipMemFile(long nGrowBy = 1024)
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{
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Init();
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m_nGrowBy = nGrowBy;
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m_bAutoDelete = true;
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}
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CZipMemFile(BYTE* lpBuf, UINT nBufSize, long nGrowBy = 0)
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{
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Attach(lpBuf, nBufSize, nGrowBy);
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}
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long GetPosition(){ return m_nPos;}
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void Attach(BYTE* lpBuf, UINT nBufSize, long nGrowBy = 0)
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{
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Close();
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m_lpBuf = lpBuf;
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m_nGrowBy = nGrowBy;
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m_nBufSize = nBufSize;
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m_nDataSize = nGrowBy == 0 ? nBufSize : 0;
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m_bAutoDelete = false;
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}
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BYTE* Detach()
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{
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BYTE* b = m_lpBuf;
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Init();
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return b;
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}
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void Close()
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{
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if (m_bAutoDelete)
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Free();
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Init();
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}
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virtual ~CZipMemFile(){Close();}
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};
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#endif // !defined(AFX_ZIPMEMFILE_H__EA73AB25_6B51_4C5E_8D78_BAC95812598F__INCLUDED_)
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