121 lines
3.7 KiB
C++
Executable File
121 lines
3.7 KiB
C++
Executable File
/*===========================================================================
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FILE:
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MemoryMappedFile.h
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DESCRIPTION:
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Declaration of cMemoryMappedFile class
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PUBLIC CLASSES AND METHODS:
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cMemoryMappedFile
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The cMemoryMappedFile class provides the ability to read in a file
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via Linux memory maps
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Note: cMemoryMappedFiles are read only
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Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Code Aurora Forum nor
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the names of its contributors may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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===========================================================================*/
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//---------------------------------------------------------------------------
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// Pragmas
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//---------------------------------------------------------------------------
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#pragma once
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/*=========================================================================*/
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// Class cMemoryMappedFile
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/*=========================================================================*/
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class cMemoryMappedFile
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{
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public:
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// Constructor (loads file)
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cMemoryMappedFile( LPCSTR pFile );
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// Constructor (loads file from resource)
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cMemoryMappedFile(
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const char * pStart,
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const int nSize );
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// Destructor
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virtual ~cMemoryMappedFile();
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// (Inline) Get error status
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DWORD GetStatus()
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{
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DWORD stat = mStatus;
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if (mStatus == NO_ERROR)
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{
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if (mpBuffer == 0 || mFileSize == 0)
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{
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// We failed but GetLastError() return NO_ERROR
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stat = ERROR_NO_MORE_ITEMS;
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}
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}
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return stat;
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};
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// (Inline) Return the size of the file (contents)
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ULONG GetSize()
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{
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ULONG sz = 0;
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if (GetStatus() == NO_ERROR)
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{
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sz = mFileSize;
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}
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return sz;
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};
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// (Inline) Return the file contents
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LPVOID GetContents()
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{
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LPVOID pContents = 0;
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if (GetStatus() == NO_ERROR)
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{
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pContents = mpBuffer;
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}
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return pContents;
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};
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protected:
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/* Resource based file? */
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bool mbResourceBased;
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/* File handle */
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int mFile;
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/* File contents*/
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LPVOID mpBuffer;
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/* File size */
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ULONG mFileSize;
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/* Error status */
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DWORD mStatus;
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};
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