140 lines
3 KiB
C++
140 lines
3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// This source file is part of the ZipArchive library source distribution and
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// is Copyrighted 2000 - 2012 by Artpol Software - Tadeusz Dracz
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//
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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 refer to the License.txt file.
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//
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// Web Site: http://www.artpol-software.com
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////////////////////////////////////////////////////////////////////////////////
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/**
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* \file ZipMemFile.h
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* Includes the CZipMemFile class.
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*
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*/
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#if !defined(ZIPARCHIVE_ZIPMEMFILE_DOT_H)
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#define ZIPARCHIVE_ZIPMEMFILE_DOT_H
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#if _MSC_VER > 1000
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#pragma once
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#endif
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#include "ZipAbstractFile.h"
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#include "ZipString.h"
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#include "ZipExport.h"
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/**
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Represents a file in memory.
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Automatically grows when necessary.
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*/
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class ZIP_API CZipMemFile : public CZipAbstractFile
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// when ZIP_ZFI_WIN is defined under VS 6.0, do not derive from CFile, as sizes are limited to DWORD
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#if defined _ZIP_IMPL_MFC && (_MSC_VER >= 1300 || _ZIP_FILE_IMPLEMENTATION != ZIP_ZFI_WIN)
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, public CFile
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#endif
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{
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protected:
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size_t m_nGrowBy, m_nPos;
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size_t 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(size_t nBytes);
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public:
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#if defined _ZIP_IMPL_MFC && (_MSC_VER >= 1300 || _ZIP_FILE_IMPLEMENTATION != ZIP_ZFI_WIN)
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DECLARE_DYNAMIC(CZipMemFile)
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#endif
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bool IsClosed() const { return m_lpBuf == NULL;}
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void Flush(){}
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ZIP_FILE_USIZE Seek(ZIP_FILE_SIZE lOff, int nFrom);
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ZIP_FILE_USIZE GetLength() const {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(ZIP_FILE_USIZE nNewLen);
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CZipString GetFilePath() const {return _T("");}
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bool HasFilePath() const
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{
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return false;
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}
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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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Init();
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Attach(lpBuf, nBufSize, nGrowBy);
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}
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CZipMemFile(CZipMemFile& from)
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{
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Copy(from);
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}
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void Copy(CZipMemFile& from)
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{
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SetLength(from.m_nDataSize);
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from.Read(m_lpBuf, (UINT)from.m_nDataSize);
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}
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ZIP_FILE_USIZE GetPosition() const { 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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m_nPos = 0;
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}
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void ReInit(long nGrowBy = 1024)
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{
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Close();
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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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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(ZIPARCHIVE_ZIPMEMFILE_DOT_H)
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