author | hgs |
Thu, 05 Aug 2010 18:45:56 +0530 | |
changeset 48 | ab61c4cedc64 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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// (C) Copyright Jonathan Turkanis 2003. |
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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_HPP_INCLUDED |
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#define BOOST_IOSTREAMS_STREAM_HPP_INCLUDED |
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#if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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# pragma once |
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#endif |
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#include <boost/iostreams/constants.hpp> |
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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/iostream.hpp> // standard streams. |
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#include <boost/iostreams/detail/select.hpp> |
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#include <boost/iostreams/stream_buffer.hpp> |
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#include <boost/mpl/and.hpp> |
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#include <boost/type_traits/is_convertible.hpp> |
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namespace boost { namespace iostreams { namespace detail { |
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template<typename Device, typename Tr> |
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struct stream_traits { |
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typedef typename char_type_of<Device>::type char_type; |
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typedef Tr traits_type; |
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typedef typename category_of<Device>::type mode; |
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typedef typename |
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iostreams::select< // Dismbiguation required for Tru64. |
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mpl::and_< |
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is_convertible<mode, input>, |
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is_convertible<mode, output> |
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>, |
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BOOST_IOSTREAMS_BASIC_IOSTREAM(char_type, traits_type), |
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is_convertible<mode, input>, |
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BOOST_IOSTREAMS_BASIC_ISTREAM(char_type, traits_type), |
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else_, |
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BOOST_IOSTREAMS_BASIC_OSTREAM(char_type, traits_type) |
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>::type type; |
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}; |
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// By encapsulating initialization in a base, we can define the macro |
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// BOOST_IOSTREAMS_DEFINE_FORWARDING_FUNCTIONS to generate constuctors |
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// without base member initializer lists. |
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template< typename Device, |
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typename Tr = |
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BOOST_IOSTREAMS_CHAR_TRAITS( |
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BOOST_DEDUCED_TYPENAME char_type_of<Device>::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<Device>::type |
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>, |
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typename Base = // VC6 Workaround. |
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BOOST_DEDUCED_TYPENAME |
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detail::stream_traits<Device, Tr>::type > |
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class stream_base |
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: protected base_from_member< stream_buffer<Device, Tr, Alloc> >, |
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public Base |
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{ |
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private: |
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typedef base_from_member< stream_buffer<Device, Tr, Alloc> > pbase_type; |
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typedef typename stream_traits<Device, Tr>::type stream_type; |
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protected: |
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using pbase_type::member; // Avoid warning about 'this' in initializer list. |
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public: |
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stream_base() : pbase_type(), stream_type(&member) { } |
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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.hpp> |
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#else |
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namespace boost { namespace iostreams { |
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// |
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// Template name: stream. |
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// Description: A iostream which reads from and writes to an instance of a |
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// designated device type. |
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// Template paramters: |
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// Device - A device type. |
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// Alloc - The allocator type. |
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// |
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template< typename Device, |
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typename Tr = |
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BOOST_IOSTREAMS_CHAR_TRAITS( |
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BOOST_DEDUCED_TYPENAME char_type_of<Device>::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<Device>::type |
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> > |
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struct stream : detail::stream_base<Device, Tr, Alloc> { |
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public: |
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typedef typename char_type_of<Device>::type char_type; |
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BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) |
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private: |
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typedef typename |
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detail::stream_traits< |
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Device, Tr |
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>::type stream_type; |
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typedef Device policy_type; |
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public: |
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stream() { } |
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BOOST_IOSTREAMS_FORWARD( stream, open_impl, Device, |
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BOOST_IOSTREAMS_PUSH_PARAMS, |
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BOOST_IOSTREAMS_PUSH_ARGS ) |
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bool is_open() const { return this->member.is_open(); } |
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void close() { this->member.close(); } |
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bool auto_close() const { return this->member.auto_close(); } |
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void set_auto_close(bool close) { this->member.set_auto_close(close); } |
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bool strict_sync() { return this->member.strict_sync(); } |
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Device& operator*() { return *this->member; } |
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Device* operator->() { return &*this->member; } |
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Device* component() { return this->member.component(); } |
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private: |
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void open_impl(const Device& dev BOOST_IOSTREAMS_PUSH_PARAMS()) // For forwarding. |
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{ |
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this->clear(); |
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this->member.open(dev BOOST_IOSTREAMS_PUSH_ARGS()); |
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} |
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}; |
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|
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} } // End namespaces iostreams, boost. |
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|
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#endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
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#endif // #ifndef BOOST_IOSTREAMS_stream_HPP_INCLUDED |