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////////////////////////////////////////////////////////////////////////////////
// This source file is part of the ZipArchive library source distribution and
// is Copyrighted 2000 - 2007 by Artpol Software - Tadeusz Dracz
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// For the licensing details refer to the License.txt file.
//
// Web Site: http://www.artpol-software.com
////////////////////////////////////////////////////////////////////////////////
/**
* \file ZipMemFile.h
* Includes the CZipMemFile class.
*
*/
#if !defined(ZIPARCHIVE_ZIPMEMFILE_DOT_H)
#define ZIPARCHIVE_ZIPMEMFILE_DOT_H
#if _MSC_VER > 1000
#pragma once
#endif
#include "ZipAbstractFile.h"
#include "ZipString.h"
#include "ZipExport.h"
/**
Represents a file in memory.
Automatically grows when necessary.
*/
class ZIP_API CZipMemFile : public CZipAbstractFile
{
protected:
size_t m_nGrowBy, m_nPos;
size_t m_nBufSize, m_nDataSize;
BYTE* m_lpBuf;
bool m_bAutoDelete;
void Free()
{
if (m_lpBuf)
{
free(m_lpBuf);
m_lpBuf = NULL;
}
}
void Init()
{
m_nGrowBy = m_nPos = 0;
m_nBufSize = m_nDataSize = 0;
m_lpBuf = NULL;
}
void Grow(size_t nBytes);
public:
bool IsClosed() const { return m_lpBuf == NULL;}
void Flush(){}
ZIP_FILE_USIZE Seek(ZIP_FILE_SIZE lOff, int nFrom);
ZIP_FILE_USIZE GetLength() const {return m_nDataSize;}
void Write(const void* lpBuf, UINT nCount);
UINT Read(void* lpBuf, UINT nCount);
void SetLength(ZIP_FILE_USIZE nNewLen);
CZipString GetFilePath() const {return _T("");}
CZipMemFile(long nGrowBy = 1024)
{
Init();
m_nGrowBy = nGrowBy;
m_bAutoDelete = true;
}
CZipMemFile(BYTE* lpBuf, UINT nBufSize, long nGrowBy = 0)
{
Init();
Attach(lpBuf, nBufSize, nGrowBy);
}
CZipMemFile(CZipMemFile& from)
{
Copy(from);
}
void Copy(CZipMemFile& from)
{
SetLength(from.m_nDataSize);
from.Read(m_lpBuf, (UINT)from.m_nDataSize);
}
ZIP_FILE_USIZE GetPosition() const { return m_nPos;}
void Attach(BYTE* lpBuf, UINT nBufSize, long nGrowBy = 0)
{
Close();
m_lpBuf = lpBuf;
m_nGrowBy = nGrowBy;
m_nBufSize = nBufSize;
m_nDataSize = nGrowBy == 0 ? nBufSize : 0;
m_bAutoDelete = false;
}
void ReInit(long nGrowBy = 1024)
{
Close();
Init();
m_nGrowBy = nGrowBy;
m_bAutoDelete = true;
}
BYTE* Detach()
{
BYTE* b = m_lpBuf;
Init();
return b;
}
void Close()
{
if (m_bAutoDelete)
Free();
Init();
}
virtual ~CZipMemFile(){Close();}
};
#endif // !defined(ZIPARCHIVE_ZIPMEMFILE_DOT_H)
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