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