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MemFile.h

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00001 
00005 /*
00006 Copyright (C) 2004-2007  Anders Hedstrom
00007 
00008 This library is made available under the terms of the GNU GPL.
00009 
00010 If you would like to use this library in a closed-source application,
00011 a separate license agreement is available. For information about 
00012 the closed-source license agreement for the C++ sockets library,
00013 please visit http://www.alhem.net/Sockets/license.html and/or
00014 email license@alhem.net.
00015 
00016 This program is free software; you can redistribute it and/or
00017 modify it under the terms of the GNU General Public License
00018 as published by the Free Software Foundation; either version 2
00019 of the License, or (at your option) any later version.
00020 
00021 This program is distributed in the hope that it will be useful,
00022 but WITHOUT ANY WARRANTY; without even the implied warranty of
00023 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00024 GNU General Public License for more details.
00025 
00026 You should have received a copy of the GNU General Public License
00027 along with this program; if not, write to the Free Software
00028 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00029 */
00030 #ifndef _SOCKETS_MemFile_H
00031 #define _SOCKETS_MemFile_H
00032 
00033 #include "sockets-config.h"
00034 #include <map>
00035 #include "IFile.h"
00036 
00037 #define BLOCKSIZE 32768
00038 
00039 #ifdef SOCKETS_NAMESPACE
00040 namespace SOCKETS_NAMESPACE {
00041 #endif
00042 
00043 
00046 class MemFile : public IFile
00047 {
00048 public:
00051         struct block_t {
00052                 block_t() : next(NULL) {}
00053                 struct block_t *next;
00054                 char data[BLOCKSIZE];
00055         };
00056 public:
00057         MemFile();
00058         MemFile(const std::string& path);
00059         ~MemFile();
00060 
00061         bool fopen(const std::string& path, const std::string& mode);
00062         void fclose();
00063 
00064         size_t fread(char *ptr, size_t size, size_t nmemb);
00065         size_t fwrite(const char *ptr, size_t size, size_t nmemb);
00066 
00067         char *fgets(char *s, int size);
00068         void fprintf(const char *format, ...);
00069 
00070         off_t size();
00071         bool eof();
00072 
00073 private:
00074         MemFile(const MemFile& ) {} // copy constructor
00075         MemFile& operator=(const MemFile& ) { return *this; } // assignment operator
00076 
00077 static  std::map<std::string,block_t *> m_files;
00078         std::string m_path;
00079         bool m_temporary;
00080         block_t *m_base;
00081         block_t *m_current_read;
00082         block_t *m_current_write;
00083         size_t m_read_ptr;
00084         size_t m_write_ptr;
00085         bool m_b_read_caused_eof;
00086 };
00087 
00088 
00089 
00090 
00091 #ifdef SOCKETS_NAMESPACE
00092 }
00093 #endif
00094 
00095 #endif // _SOCKETS_MemFile_H
Page, code, and content Copyright (C) 2007 by Anders Hedström
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