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/*
* Copyright (C) 2008-2009 Patrick Ohly <patrick.ohly@gmx.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef INCL_EVOLUTION_SAFE_OSTREAM
# define INCL_EVOLUTION_SAFE_OSTREAM
#include <fstream>
#include <string>
#include <syncevo/declarations.h>
SE_BEGIN_CXX
/**
* Writes into temporary file (.# prefix) first, then renames to real
* file only when no error encountered at the time of deleting the
* instance. Once instantiated, the only way to safe the content of the
* real file is to set the "fail" bit. In that sense it is similar to
* instantiating a normal ofstream, which would directly overwrite
* the file at creation time.
*/
class SafeOstream : public std::ofstream
{
std::string m_filename;
std::string m_tmpFilename;
public:
/**
* @param filename real filename, without the .# prefix
*/
SafeOstream(const std::string filename);
/**
* on success, rename file
*/
~SafeOstream();
};
SE_END_CXX
#endif // INCL_EVOLUTION_SAFE_OSTREAM
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