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00001 /******************************************************************************** 00002 * * 00003 * Memory Mapped File Stream * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 2003 by Mathew Robertson. All Rights Reserved. * 00007 ********************************************************************************* 00008 * This library is free software; you can redistribute it and/or * 00009 * modify it under the terms of the GNU Lesser General Public * 00010 * License as published by the Free Software Foundation; either * 00011 * version 2.1 of the License, or (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 00016 * Lesser General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Lesser General Public * 00019 * License along with this library; if not, write to the Free Software * 00020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * 00021 ********************************************************************************/ 00022 #ifndef FXMEMORYMAPPEDSTREAM_H 00023 #define FXMEMORYMAPPEDSTREAM_H 00024 00025 #ifndef FXSTREAM_H 00026 #include "FXStream.h" 00027 #endif 00028 namespace FXEX { 00029 00030 /** 00031 * Allows you to serailise/deserialise an FXStream from a file which has been memory mapped. 00032 */ 00033 class FXAPI FXMemoryMappedStream : public FXStream { 00034 private: 00035 FXuchar *region; // memory mapped region 00036 unsigned long space; // region size 00037 protected: 00038 virtual void saveItems(const void *buf,unsigned long n); 00039 virtual void loadItems(void *buf,unsigned long n); 00040 00041 public: 00042 /// Create stream to bind to memory mapped region of file 00043 FXMemoryMappedStream(const FXObject* cont=NULL); 00044 00045 /// Open file store 00046 FXbool open(void* region,unsigned long size,FXStreamDirection save_or_load); 00047 00048 /// Close file store 00049 FXbool close(); 00050 00051 /// Move to position 00052 virtual FXbool position(unsigned long p); 00053 00054 /// Save to stream 00055 virtual FXStream& operator<<(const FXuchar& v); 00056 virtual FXStream& operator<<(const FXchar& v); 00057 00058 /// Load from stream 00059 virtual FXStream& operator>>(FXuchar& v); 00060 virtual FXStream& operator>>(FXchar& v); 00061 00062 /// Destructor 00063 virtual ~FXMemoryMappedStream(); 00064 }; 00065 00066 } // namespace FXEX 00067 #endif // FXMEMORYMAPPEDSTREAM_H