FileReader.h

00001 //
00002 // Copyright(C) 2005--2006 Institute of Computing Tech, Chinese Academy of Sciences. 
00003 // All rights reserved.
00004 // This file is part of FirteX (www.firtex.org)
00005 //
00006 // Use of the FirteX is subject to the terms of the software license set forth in 
00007 // the LICENSE file included with this software, and also available at
00008 // http://www.firtex.org/license.html
00009 //
00010 // Author       : 郭瑞杰(GuoRuijie)
00011 // Email        : ruijieguo@software.ict.ac.cn,ruijieguo@gmail.com
00012 // Created      : 2005/12/16
00013 //
00014 #ifndef __FILEREADER_H
00015 #define __FILEREADER_H
00016 
00017 #include "../utility/StdHeader.h"
00018 #include "Reader.h"
00019 
00020 namespace firtex
00021 {
00022         namespace utility
00023         {
00024                 class CFileReader : public CReader
00025                 {                               
00026                 public:
00027                         CFileReader();
00028                         CFileReader(char* buffer,size_t buffsize);
00029                         CFileReader(size_t buffsize);
00030                         CFileReader(const tstring& filename);
00031                         CFileReader(const tstring& filename,char* buffer,size_t buffsize);
00032                         CFileReader(const tstring& filename,size_t buffsize);
00033                         virtual ~CFileReader();
00034                 public:                 
00035                         bool    open(const tstring& filename,bool bThrowError = false);
00036                         void    close();                        
00037 
00038                         CReader*        clone(char* buffer,size_t buffsize);
00039                         CReader*        clone();
00040 
00041                         const char* getReaderName() const{return "FileReader";}
00042                 protected:
00043                         void  readInternal(char* b, size_t offset, size_t len);                                         
00044                         void  seekInternal(int64_t position);
00045                 protected:                      
00046                         int                             m_fileHandle;
00047                         tstring                 m_filename;
00048                 };
00049         }
00050 }
00051 
00052 #endif