141 lines
3.1 KiB
C++
141 lines
3.1 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2014
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
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* EU, LV-1021.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#pragma once
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namespace MemoryMapping
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{
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class CMappingFile
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{
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public:
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CMappingFile()
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: m_hMapping(NULL)
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, m_pView(NULL)
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, m_hFile(NULL)
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{
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}
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~CMappingFile()
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{
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Close();
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}
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BOOL Open(const CString& strPath)
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{
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Close();
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if (OpenExistingFile(strPath))
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return TRUE;
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return FALSE;
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}
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void Close()
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{
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if (m_pView)
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{
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UnmapViewOfFile(m_pView);
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m_pView = 0;
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}
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if (m_hMapping)
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{
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CloseHandle(m_hMapping);
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m_hMapping = 0;
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}
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if (m_hFile)
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{
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CloseHandle(m_hFile);
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m_hFile = NULL;
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}
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}
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BOOL Valid()
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{
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if (m_pView)
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return TRUE;
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return FALSE;
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}
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BYTE* GetData()
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{
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return (BYTE*)m_pView;
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}
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long GetSize() const
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{
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return m_dwDataSize;
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}
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private:
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HANDLE m_hMapping;
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HANDLE m_hFile;
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LPVOID m_pView;
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DWORD m_dwDataSize;
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BOOL OpenExistingFile(const CString& strPath)
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{
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m_hFile= CreateFile(strPath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (INVALID_HANDLE_VALUE == m_hFile)
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{
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DWORD dwErr = GetLastError();
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return FALSE;
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}
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DWORD dwFileSizeHigh = 0;
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m_dwDataSize = 0;
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m_dwDataSize = GetFileSize(m_hFile, &dwFileSizeHigh);
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m_hMapping = CreateFileMapping(m_hFile, NULL, PAGE_READONLY, dwFileSizeHigh, m_dwDataSize, NULL);
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if (!m_hMapping)
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{
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Close();
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return FALSE;
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}
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m_pView = MapViewOfFile(m_hMapping, FILE_MAP_READ, 0, 0, 0);
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if (!m_pView)
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{
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DWORD dwErr = GetLastError();
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Close();
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return FALSE;
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}
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return TRUE;
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}
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};
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}; |