boost/iostreams/filtering_streambuf.hpp
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2003-2007 Jonathan Turkanis
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
// See http://www.boost.org/libs/iostreams for documentation.
#ifndef BOOST_IOSTREAMS_FILTERING_STREAMBUF_HPP_INCLUDED
#define BOOST_IOSTREAMS_FILTERING_STREAMBUF_HPP_INCLUDED
#if defined(_MSC_VER)
# pragma once
#endif
#include <exception>
#include <memory> // allocator.
#include <boost/iostreams/chain.hpp>
#include <boost/iostreams/detail/access_control.hpp>
#include <boost/iostreams/detail/char_traits.hpp>
#include <boost/iostreams/detail/push.hpp>
#include <boost/iostreams/detail/streambuf.hpp> // pubsync.
#include <boost/iostreams/detail/streambuf/chainbuf.hpp>
#include <boost/mpl/if.hpp>
namespace boost { namespace iostreams {
//
// Macro: BOOST_IOSTREAMS_DEFINE_FILTERBUF(name_, chain_type_, default_char_)
// Description: Defines a template derived from std::basic_streambuf which uses
// a chain to perform i/o. The template has the following parameters:
// Ch - The character type.
// Tr - The character traits type.
// Alloc - The allocator type.
// Access - Indicates accessibility of the chain interface; must be either
// public_ or protected_; defaults to public_.
//
#define BOOST_IOSTREAMS_DEFINE_FILTER_STREAMBUF(name_, chain_type_, default_char_) \
template< typename Mode, \
typename Ch = default_char_, \
typename Tr = BOOST_IOSTREAMS_CHAR_TRAITS(Ch), \
typename Alloc = std::allocator<Ch>, \
typename Access = public_ > \
class name_ : public boost::iostreams::detail::chainbuf< \
chain_type_<Mode, Ch, Tr, Alloc>, Mode, Access \
> \
{ \
public: \
typedef Ch char_type; \
struct category \
: Mode, closable_tag, streambuf_tag \
{ }; \
BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) \
typedef Mode mode; \
typedef chain_type_<Mode, Ch, Tr, Alloc> chain_type; \
name_() { } \
BOOST_IOSTREAMS_DEFINE_PUSH_CONSTRUCTOR(name_, mode, Ch, push_impl) \
~name_() { if (this->is_complete()) this->BOOST_IOSTREAMS_PUBSYNC(); } \
}; \
/**/
BOOST_IOSTREAMS_DEFINE_FILTER_STREAMBUF(filtering_streambuf, boost::iostreams::chain, char)
BOOST_IOSTREAMS_DEFINE_FILTER_STREAMBUF(filtering_wstreambuf, boost::iostreams::chain, wchar_t)
typedef filtering_streambuf<input> filtering_istreambuf;
typedef filtering_streambuf<output> filtering_ostreambuf;
typedef filtering_wstreambuf<input> filtering_wistreambuf;
typedef filtering_wstreambuf<output> filtering_wostreambuf;
} } // End namespaces iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_FILTERING_STREAMBUF_HPP_INCLUDED