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https://github.com/rajkosto/mxoemu
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115 lines
3 KiB
C++
115 lines
3 KiB
C++
/** \file MemFile.h
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** \date 2005-04-25
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** \author grymse@alhem.net
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**/
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/*
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Copyright (C) 2004-2010 Anders Hedstrom
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This library is made available under the terms of the GNU GPL, with
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the additional exemption that compiling, linking, and/or using OpenSSL
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is allowed.
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If you would like to use this library in a closed-source application,
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a separate license agreement is available. For information about
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the closed-source license agreement for the C++ sockets library,
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please visit http://www.alhem.net/Sockets/license.html and/or
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email license@alhem.net.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _SOCKETS_MemFile_H
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#define _SOCKETS_MemFile_H
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#include "sockets-config.h"
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#include <map>
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#include "File.h"
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#include "Mutex.h"
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#define BLOCKSIZE 32768
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#ifdef SOCKETS_NAMESPACE
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namespace SOCKETS_NAMESPACE {
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#endif
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/** Implements a memory file.
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\ingroup file */
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class MemFile : public IFile
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{
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public:
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/** File block structure.
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\ingroup file */
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struct block_t {
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block_t() : next(NULL) {}
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struct block_t *next;
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char data[BLOCKSIZE];
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};
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public:
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/** Create temporary memory buffer, will be freed when object destructs */
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MemFile();
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/** Copy buffer from source, reset read ptr */
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MemFile(MemFile& );
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/** Read file and write to this, create non-temporary memory buffer from f.Path() */
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MemFile(File& f);
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~MemFile();
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bool fopen(const std::string& path, const std::string& mode);
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void fclose() const;
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size_t fread(char *ptr, size_t size, size_t nmemb) const;
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size_t fwrite(const char *ptr, size_t size, size_t nmemb);
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char *fgets(char *s, int size) const;
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void fprintf(const char *format, ...);
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off_t size() const;
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bool eof() const;
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void reset_read() const;
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void reset_write();
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/** Reference count when copy constructor is used */
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int RefCount() const;
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void Increase();
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void Decrease();
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const std::string& Path() const;
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private:
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MemFile& operator=(const MemFile& ) { return *this; } // assignment operator
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MemFile& m_src;
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bool m_src_valid;
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block_t *m_base;
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mutable block_t *m_current_read;
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block_t *m_current_write;
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int m_current_write_nr;
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mutable size_t m_read_ptr;
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size_t m_write_ptr;
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mutable bool m_b_read_caused_eof;
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int m_ref_count;
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mutable bool m_ref_decreased;
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std::string m_path;
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};
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#ifdef SOCKETS_NAMESPACE
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}
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#endif
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#endif // _SOCKETS_MemFile_H
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