zipfilemapping.h

ZIP压缩、解压缩算法库

////////////////////////////////////////////////////////////////////////////////
// $RCSfile: ZipFileMapping.h,v $
// $Revision: 1.1.2.2 $ $Name:  $
// $Date: 2005/02/14 08:06:59 $ $Author: Tadeusz Dracz $
////////////////////////////////////////////////////////////////////////////////
// This source file is part of the ZipArchive library source distribution and
// is Copyrighted 2000-2005 by Tadeusz Dracz (http://www.artpol-software.com/)
//
// 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 see the file License.txt
////////////////////////////////////////////////////////////////////////////////


#if !defined(AFX_AUTOHANDLE_H__D68326EA_D7FA_4792_AB1F_68D09533E399__INCLUDED_)
#define AFX_AUTOHANDLE_H__D68326EA_D7FA_4792_AB1F_68D09533E399__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <sys/mman.h>

namespace ziparchv
{
	

	struct CZipFileMapping
	{
		CZipFileMapping()
		{
			m_iSize = 0;
			m_pFileMap = NULL;
		}
		bool CreateMapping(CZipFile* pFile)
		{
			if (!pFile)
				return false;
			m_iSize = pFile->GetLength();
			m_pFileMap = mmap(0, m_iSize, PROT_READ|PROT_WRITE, MAP_SHARED, pFile->m_hFile, 0);
			return (m_pFileMap != NULL);
		}
		void RemoveMapping()
		{
                
			if (m_pFileMap)
			{
				munmap(m_pFileMap, m_iSize);
				m_pFileMap = NULL;
			}
		}
		~CZipFileMapping()
		{
			RemoveMapping();
		}
		char* GetMappedMemory()
		{
			return reinterpret_cast<char*> (m_pFileMap);
		}
	protected:
		void* m_pFileMap;
		size_t m_iSize;

	};
}

#endif // !defined(AFX_AUTOHANDLE_H__D68326EA_D7FA_4792_AB1F_68D09533E399__INCLUDED_)