// (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_STREAM_BUFFER_HPP_INCLUDED | |
#define BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma once | |
#endif | |
#include <memory> // allocator. | |
#include <boost/config.hpp> // BOOST_DEDUCED_TYPENAME. | |
#include <boost/iostreams/detail/char_traits.hpp> | |
#include <boost/iostreams/detail/config/overload_resolution.hpp> | |
#include <boost/iostreams/detail/forward.hpp> | |
#include <boost/iostreams/detail/ios.hpp> // failure, streamsize. | |
#include <boost/iostreams/detail/streambuf/direct_streambuf.hpp> | |
#include <boost/iostreams/detail/streambuf/indirect_streambuf.hpp> | |
#include <boost/iostreams/traits.hpp> | |
#include <boost/static_assert.hpp> | |
#include <boost/throw_exception.hpp> | |
#include <boost/type_traits/is_convertible.hpp> | |
// Must come last. | |
#include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC. | |
namespace boost { namespace iostreams { namespace detail { | |
template<typename T, typename Tr, typename Alloc, typename Mode> | |
struct stream_buffer_traits { | |
typedef typename | |
mpl::if_< | |
is_convertible< | |
BOOST_DEDUCED_TYPENAME category_of<T>::type, | |
direct_tag | |
>, | |
direct_streambuf<T, Tr>, | |
indirect_streambuf<T, Tr, Alloc, Mode> | |
>::type type; | |
}; | |
} } } // End namespaces detail, iostreams, boost | |
#ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION | |
# include <boost/iostreams/detail/broken_overload_resolution/stream_buffer.hpp> | |
#else | |
namespace boost { namespace iostreams { | |
template< typename T, | |
typename Tr = | |
BOOST_IOSTREAMS_CHAR_TRAITS( | |
BOOST_DEDUCED_TYPENAME char_type_of<T>::type | |
), | |
typename Alloc = | |
std::allocator< | |
BOOST_DEDUCED_TYPENAME char_type_of<T>::type | |
>, | |
typename Mode = BOOST_DEDUCED_TYPENAME mode_of<T>::type > | |
class stream_buffer | |
: public detail::stream_buffer_traits<T, Tr, Alloc, Mode>::type | |
{ | |
private: | |
BOOST_STATIC_ASSERT(( | |
is_convertible< | |
BOOST_DEDUCED_TYPENAME iostreams::category_of<T>::type, Mode | |
>::value | |
)); | |
typedef typename | |
detail::stream_buffer_traits< | |
T, Tr, Alloc, Mode | |
>::type base_type; | |
public: | |
typedef typename char_type_of<T>::type char_type; | |
struct category | |
: Mode, | |
closable_tag, | |
streambuf_tag | |
{ }; | |
BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) | |
public: | |
stream_buffer() { } | |
~stream_buffer() | |
{ | |
try { | |
if (this->is_open() && this->auto_close()) | |
this->close(); | |
} catch (...) { } | |
} | |
BOOST_IOSTREAMS_FORWARD( stream_buffer, open_impl, T, | |
BOOST_IOSTREAMS_PUSH_PARAMS, | |
BOOST_IOSTREAMS_PUSH_ARGS ) | |
T& operator*() { return *this->component(); } | |
T* operator->() { return this->component(); } | |
private: | |
void open_impl(const T& t BOOST_IOSTREAMS_PUSH_PARAMS()) | |
{ // Used for forwarding. | |
if (this->is_open()) | |
boost::throw_exception( | |
BOOST_IOSTREAMS_FAILURE("already open") | |
); | |
base_type::open(t BOOST_IOSTREAMS_PUSH_ARGS()); | |
} | |
}; | |
} } // End namespaces iostreams, boost. | |
#endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION | |
#include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC. | |
#endif // #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED |