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/*************************************************************************
* Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension 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 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension 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 program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
// Some internal magic to use C FILE* I/O with C++ streams.
#ifndef DIMENSIONXX_COOKIE_HPP
#define DIMENSIONXX_COOKIE_HPP
#include <istream>
#include <ostream>
#include <cstdio>
namespace Dimension
{
// Simple RAII classes for FILE*'s which interface with a C++ stream.
class FILE_Cookie
{
public:
// Destructor made pure virtual
virtual ~FILE_Cookie() = 0;
// Get the magic FILE*
FILE* file() { return m_file; }
const FILE* file() const { return m_file; }
protected:
FILE_Cookie() { }
// Set the underlying FILE*
void file(FILE* file) { m_file = file; }
private:
std::FILE* m_file;
// Copying prohibited
FILE_Cookie(const FILE_Cookie& cookie);
FILE_Cookie& operator=(const FILE_Cookie& cookie);
};
class iFILE_Cookie : public virtual FILE_Cookie
{
public:
iFILE_Cookie(std::istream& istr);
virtual ~iFILE_Cookie();
// Get the C++ streams
std::istream& istr() { return *m_istr; }
const std::istream& istr() const { return *m_istr; }
protected:
// Just set the istream without initializing the FILE*
iFILE_Cookie(std::istream& istr, int) : m_istr(&istr) { }
private:
std::istream* m_istr;
};
class oFILE_Cookie : public virtual FILE_Cookie
{
public:
oFILE_Cookie(std::ostream& ostr);
virtual ~oFILE_Cookie();
// Get the C++ streams
std::ostream& ostr() { return *m_ostr; }
const std::ostream& ostr() const { return *m_ostr; }
protected:
// Just set the istream without initializing the FILE*
oFILE_Cookie(std::ostream& ostr, int) : m_ostr(&ostr) { }
private:
std::ostream* m_ostr;
};
class ioFILE_Cookie : public iFILE_Cookie, public oFILE_Cookie
{
public:
ioFILE_Cookie(std::iostream& iostr);
virtual ~ioFILE_Cookie();
};
}
#endif /* DIMENSIONXX_COOKIE_HPP */
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