[857] | 1 | // (C) Copyright Jonathan Turkanis 2003.
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| 2 | // Distributed under the Boost Software License, Version 1.0. (See accompanying
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| 3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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| 4 |
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| 5 | // See http://www.boost.org/libs/iostreams for documentation.
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| 6 |
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| 7 | #ifndef BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
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| 8 | #define BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
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| 9 |
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| 10 | #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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| 11 | # pragma once
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| 12 | #endif
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| 13 |
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| 14 | #include <typeinfo>
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| 15 | #include <boost/config.hpp> // member template friends.
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| 16 | #include <boost/iostreams/detail/char_traits.hpp>
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| 17 | #include <boost/iostreams/detail/ios.hpp> // openmode.
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| 18 | #include <boost/iostreams/detail/streambuf.hpp>
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| 19 |
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| 20 | // Must come last.
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| 21 | #include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC.
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| 22 |
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| 23 | namespace boost { namespace iostreams { namespace detail {
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| 24 |
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| 25 | template<typename Self, typename Ch, typename Tr, typename Alloc, typename Mode>
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| 26 | class chain_base;
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| 27 |
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| 28 | template<typename Chain, typename Access, typename Mode> class chainbuf;
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| 29 |
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| 30 | #define BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base) \
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| 31 | using base::eback; using base::gptr; using base::egptr; \
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| 32 | using base::setg; using base::gbump; using base::pbase; \
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| 33 | using base::pptr; using base::epptr; using base::setp; \
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| 34 | using base::pbump; using base::underflow; using base::pbackfail; \
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| 35 | using base::xsgetn; using base::overflow; using base::sputc; \
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| 36 | using base::xsputn; using base::sync; using base::seekoff; \
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| 37 | using base::seekpos; \
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| 38 | /**/
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| 39 |
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| 40 | template<typename Ch, typename Tr = BOOST_IOSTREAMS_CHAR_TRAITS(Ch) >
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| 41 | class linked_streambuf : public BOOST_IOSTREAMS_BASIC_STREAMBUF(Ch, Tr) {
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| 42 | protected:
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| 43 | linked_streambuf() : true_eof_(false) { }
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| 44 | void set_true_eof(bool eof) { true_eof_ = eof; }
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| 45 | public:
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| 46 |
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| 47 | // Should be called only after receiving an ordinary EOF indication,
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| 48 | // to confirm that it represents EOF rather than WOULD_BLOCK.
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| 49 | bool true_eof() const { return true_eof_; }
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| 50 | protected:
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| 51 |
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| 52 | //----------grant friendship to chain_base and chainbuf-------------------//
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| 53 |
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| 54 | #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
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| 55 | template< typename Self, typename ChT, typename TrT,
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| 56 | typename Alloc, typename Mode >
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| 57 | friend class chain_base;
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| 58 | template<typename Chain, typename Mode, typename Access>
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| 59 | friend class chainbuf;
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| 60 | #else
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| 61 | public:
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| 62 | typedef BOOST_IOSTREAMS_BASIC_STREAMBUF(Ch, Tr) base;
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| 63 | BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base)
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| 64 | #endif
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| 65 | virtual void set_next(linked_streambuf<Ch, Tr>* /* next */) { }
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| 66 | virtual void close(BOOST_IOS::openmode) = 0;
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| 67 | virtual bool auto_close() const = 0;
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| 68 | virtual void set_auto_close(bool) = 0;
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| 69 | virtual bool strict_sync() = 0;
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| 70 | virtual const std::type_info& component_type() const = 0;
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| 71 | virtual void* component_impl() = 0;
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| 72 | private:
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| 73 | bool true_eof_;
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| 74 | };
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| 75 |
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| 76 | } } } // End namespaces detail, iostreams, boost.
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| 77 |
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| 78 | #include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC.
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| 79 |
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| 80 | #endif // #ifndef BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
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