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116 lines
3.8 KiB
116 lines
3.8 KiB
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) |
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// (C) Copyright 2003-2007 Jonathan Turkanis |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) |
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// See http://www.boost.org/libs/iostreams for documentation. |
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#ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED |
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#define BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED |
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#if defined(_MSC_VER) |
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# pragma once |
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#endif |
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#include <memory> // allocator. |
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#include <boost/config.hpp> // BOOST_DEDUCED_TYPENAME. |
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#include <boost/iostreams/detail/char_traits.hpp> |
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#include <boost/iostreams/detail/config/overload_resolution.hpp> |
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#include <boost/iostreams/detail/forward.hpp> |
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#include <boost/iostreams/detail/ios.hpp> // failure, streamsize. |
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#include <boost/iostreams/detail/streambuf/direct_streambuf.hpp> |
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#include <boost/iostreams/detail/streambuf/indirect_streambuf.hpp> |
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#include <boost/iostreams/traits.hpp> |
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#include <boost/static_assert.hpp> |
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#include <boost/throw_exception.hpp> |
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#include <boost/type_traits/is_convertible.hpp> |
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// Must come last. |
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#include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC. |
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namespace boost { namespace iostreams { namespace detail { |
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template<typename T, typename Tr, typename Alloc, typename Mode> |
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struct stream_buffer_traits { |
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typedef typename |
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mpl::if_< |
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is_convertible< |
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BOOST_DEDUCED_TYPENAME category_of<T>::type, |
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direct_tag |
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>, |
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direct_streambuf<T, Tr>, |
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indirect_streambuf<T, Tr, Alloc, Mode> |
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>::type type; |
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}; |
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} } } // End namespaces detail, iostreams, boost |
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#ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
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# include <boost/iostreams/detail/broken_overload_resolution/stream_buffer.hpp> |
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#else |
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namespace boost { namespace iostreams { |
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template< typename T, |
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typename Tr = |
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BOOST_IOSTREAMS_CHAR_TRAITS( |
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BOOST_DEDUCED_TYPENAME char_type_of<T>::type |
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), |
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typename Alloc = |
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std::allocator< |
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BOOST_DEDUCED_TYPENAME char_type_of<T>::type |
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>, |
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typename Mode = BOOST_DEDUCED_TYPENAME mode_of<T>::type > |
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class stream_buffer |
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: public detail::stream_buffer_traits<T, Tr, Alloc, Mode>::type |
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{ |
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private: |
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BOOST_STATIC_ASSERT(( |
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is_convertible< |
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BOOST_DEDUCED_TYPENAME iostreams::category_of<T>::type, Mode |
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>::value |
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)); |
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typedef typename |
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detail::stream_buffer_traits< |
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T, Tr, Alloc, Mode |
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>::type base_type; |
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public: |
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typedef typename char_type_of<T>::type char_type; |
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struct category |
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: Mode, |
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closable_tag, |
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streambuf_tag |
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{ }; |
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BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) |
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public: |
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stream_buffer() { } |
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~stream_buffer() |
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{ |
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try { |
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if (this->is_open() && this->auto_close()) |
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this->close(); |
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} catch (...) { } |
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} |
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BOOST_IOSTREAMS_FORWARD( stream_buffer, open_impl, T, |
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BOOST_IOSTREAMS_PUSH_PARAMS, |
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BOOST_IOSTREAMS_PUSH_ARGS ) |
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T& operator*() { return *this->component(); } |
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T* operator->() { return this->component(); } |
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private: |
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void open_impl(const T& t BOOST_IOSTREAMS_PUSH_PARAMS()) |
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{ // Used for forwarding. |
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if (this->is_open()) |
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boost::throw_exception( |
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BOOST_IOSTREAMS_FAILURE("already open") |
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); |
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base_type::open(t BOOST_IOSTREAMS_PUSH_ARGS()); |
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} |
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}; |
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} } // End namespaces iostreams, boost. |
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#endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
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#include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC. |
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#endif // #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
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