Added boost header

test/external/boost/iostreams/detail/streambuf/linked_streambuf.hpp

@@ -0,0 +1,114 @@
+// (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_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
+#define BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <typeinfo>
+#include <boost/config.hpp>                        // member template friends.
+#include <boost/iostreams/detail/char_traits.hpp>
+#include <boost/iostreams/detail/ios.hpp>          // openmode.
+#include <boost/iostreams/detail/streambuf.hpp>
+
+// Must come last.
+#include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC.
+
+namespace boost { namespace iostreams { namespace detail {
+
+template<typename Self, typename Ch, typename Tr, typename Alloc, typename Mode>
+class chain_base;
+
+template<typename Chain, typename Access, typename Mode> class chainbuf;
+
+#define BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base) \
+    using base::eback; using base::gptr; using base::egptr; \
+    using base::setg; using base::gbump; using base::pbase; \
+    using base::pptr; using base::epptr; using base::setp; \
+    using base::pbump; using base::underflow; using base::pbackfail; \
+    using base::xsgetn; using base::overflow; using base::xsputn; \
+    using base::sync; using base::seekoff; using base::seekpos; \
+    /**/
+
+template<typename Ch, typename Tr = BOOST_IOSTREAMS_CHAR_TRAITS(Ch) >
+class linked_streambuf : public BOOST_IOSTREAMS_BASIC_STREAMBUF(Ch, Tr) {
+protected:
+    linked_streambuf() : flags_(0) { }
+    void set_true_eof(bool eof) 
+    { 
+        flags_ = (flags_ & ~f_true_eof) | (eof ? f_true_eof : 0); 
+    }
+public:
+
+    // Should be called only after receiving an ordinary EOF indication,
+    // to confirm that it represents EOF rather than WOULD_BLOCK.
+    bool true_eof() const { return (flags_ & f_true_eof) != 0; }
+protected:
+
+    //----------grant friendship to chain_base and chainbuf-------------------//
+
+#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+    template< typename Self, typename ChT, typename TrT,
+              typename Alloc, typename Mode >
+    friend class chain_base;
+    template<typename Chain, typename Mode, typename Access>
+    friend class chainbuf;
+    template<typename U>
+    friend class member_close_operation; 
+#else
+    public:
+        typedef BOOST_IOSTREAMS_BASIC_STREAMBUF(Ch, Tr) base;
+        BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base)
+#endif
+    void close(BOOST_IOS::openmode which)
+    {
+        if ( which == BOOST_IOS::in && 
+            (flags_ & f_input_closed) == 0 )
+        {
+            flags_ |= f_input_closed;
+            close_impl(which);
+        }
+        if ( which == BOOST_IOS::out && 
+            (flags_ & f_output_closed) == 0 )
+        {
+            flags_ |= f_output_closed;
+            close_impl(which);
+        }
+    }
+    void set_needs_close()
+    {
+        flags_ &= ~(f_input_closed | f_output_closed);
+    }
+    virtual void set_next(linked_streambuf<Ch, Tr>* /* next */) { }
+    virtual void close_impl(BOOST_IOS::openmode) = 0;
+    virtual bool auto_close() const = 0;
+    virtual void set_auto_close(bool) = 0;
+    virtual bool strict_sync() = 0;
+    virtual const std::type_info& component_type() const = 0;
+    virtual void* component_impl() = 0;
+#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+    private:
+#else
+    public:
+#endif
+private:
+    enum flag_type {
+        f_true_eof       = 1,
+        f_input_closed   = f_true_eof << 1,
+        f_output_closed  = f_input_closed << 1
+    };
+    int flags_;
+};
+
+} } } // End namespaces detail, iostreams, boost.
+
+#include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC.
+
+#endif // #ifndef BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED