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/* Copyright © 2005-2007 Roger Leigh <rleigh@debian.org>
*
* schroot is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* schroot 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*
*********************************************************************/
#ifndef SBUILD_NOSTREAM_H
#define SBUILD_NOSTREAM_H
#include <streambuf>
#include <ostream>
namespace sbuild
{
/**
* Null stream buffer. This stream buffer acts as a bit-bucket,
* discarding all input.
*/
template <class cT, class traits = std::char_traits<cT> >
class basic_nbuf: public std::basic_streambuf<cT, traits>
{
/**
* Output buffer. EOF is never returned.
*
* @param c the character to output.
* @returns traits::not_eof is always returned, never traits::eof.
*/
typename traits::int_type
overflow (typename traits::int_type c)
{
return traits::not_eof(c); // indicate success
}
};
/**
* Null output stream. This ostream discards all input, because it
* uses a basic_nbuf stream buffer.
*/
template <class cT, class traits = std::char_traits<cT> >
class basic_nostream: public std::basic_ostream<cT, traits>
{
public:
/// The constructor.
basic_nostream ():
std::basic_ios<cT, traits>(&nbuf),
std::basic_ostream<cT, traits>(&nbuf)
{
init(&nbuf);
}
private:
/// The stream buffer.
basic_nbuf<cT, traits> nbuf;
};
/// A null ostream.
typedef basic_nostream<char> nostream;
/// A wide null ostream.
typedef basic_nostream<wchar_t> wnostream;
/// A null ostream.
extern nostream cnull;
}
#endif /* SBUILD_NOSTREAM_H */
/*
* Local Variables:
* mode:C++
* End:
*/
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