comparison DEPENDENCIES/generic/include/boost/iostreams/detail/streambuf/chainbuf.hpp @ 16:2665513ce2d3

Add boost headers

+// (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_CHAINBUF_HPP_INCLUDED
+#define BOOST_IOSTREAMS_DETAIL_CHAINBUF_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif      
+
+#include <boost/config.hpp>                    // BOOST_MSVC, template friends.
+#include <boost/detail/workaround.hpp>
+#include <boost/iostreams/chain.hpp>
+#include <boost/iostreams/detail/access_control.hpp>
+#include <boost/iostreams/detail/config/wide_streams.hpp>
+#include <boost/iostreams/detail/streambuf.hpp>
+#include <boost/iostreams/detail/streambuf/linked_streambuf.hpp>
+#include <boost/iostreams/detail/translate_int_type.hpp>
+#include <boost/iostreams/traits.hpp>
+#include <boost/noncopyable.hpp>
+
+namespace boost { namespace iostreams { namespace detail {
+
+//--------------Definition of chainbuf----------------------------------------//
+
+//
+// Template name: chainbuf.
+// Description: Stream buffer which operates by delegating to the first
+//      linked_streambuf in a chain.
+// Template parameters:
+//      Chain - The chain type.
+//
+template<typename Chain, typename Mode, typename Access>
+class chainbuf
+    : public BOOST_IOSTREAMS_BASIC_STREAMBUF(
+                 typename Chain::char_type,
+                 typename Chain::traits_type
+             ),
+      public access_control<typename Chain::client_type, Access>,
+      private noncopyable
+{
+private:
+    typedef access_control<chain_client<Chain>, Access>      client_type;
+public:
+    typedef typename Chain::char_type                        char_type;
+    BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(typename Chain::traits_type)
+protected:
+    typedef linked_streambuf<char_type, traits_type>         delegate_type;
+    chainbuf() { client_type::set_chain(&chain_); }
+    int_type underflow() 
+        { sentry t(this); return translate(delegate().underflow()); }
+    int_type pbackfail(int_type c)
+        { sentry t(this); return translate(delegate().pbackfail(c)); }
+    std::streamsize xsgetn(char_type* s, std::streamsize n)
+        { sentry t(this); return delegate().xsgetn(s, n); }
+    int_type overflow(int_type c)
+        { sentry t(this); return translate(delegate().overflow(c)); }
+    std::streamsize xsputn(const char_type* s, std::streamsize n)
+        { sentry t(this); return delegate().xsputn(s, n); }
+    int sync() { sentry t(this); return delegate().sync(); }
+    pos_type seekoff( off_type off, BOOST_IOS::seekdir way,
+                      BOOST_IOS::openmode which =
+                          BOOST_IOS::in | BOOST_IOS::out )
+        { sentry t(this); return delegate().seekoff(off, way, which); }
+    pos_type seekpos( pos_type sp,
+                      BOOST_IOS::openmode which =
+                          BOOST_IOS::in | BOOST_IOS::out )
+        { sentry t(this); return delegate().seekpos(sp, which); }
+protected:
+    typedef BOOST_IOSTREAMS_BASIC_STREAMBUF(
+                 typename Chain::char_type,
+                 typename Chain::traits_type
+             )                                               base_type;
+//#if !BOOST_WORKAROUND(__GNUC__, == 2)                                 
+//    BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base_type)
+//#endif
+private:
+
+    // Translate from std int_type to chain's int_type.
+    typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)           std_traits;
+    typedef typename Chain::traits_type                      chain_traits;
+    static typename chain_traits::int_type 
+    translate(typename std_traits::int_type c)
+        { return translate_int_type<std_traits, chain_traits>(c); }
+
+    delegate_type& delegate() 
+        { return static_cast<delegate_type&>(chain_.front()); }
+    void get_pointers()
+        {
+            this->setg(delegate().eback(), delegate().gptr(), delegate().egptr());
+            this->setp(delegate().pbase(), delegate().epptr());
+            this->pbump((int) (delegate().pptr() - delegate().pbase()));
+        }
+    void set_pointers()
+        {
+            delegate().setg(this->eback(), this->gptr(), this->egptr());
+            delegate().setp(this->pbase(), this->epptr());
+            delegate().pbump((int) (this->pptr() - this->pbase()));
+        }
+    struct sentry {
+        sentry(chainbuf<Chain, Mode, Access>* buf) : buf_(buf)
+            { buf_->set_pointers(); }
+        ~sentry() { buf_->get_pointers(); }
+        chainbuf<Chain, Mode, Access>* buf_;
+    };
+    friend struct sentry;
+    Chain chain_;
+};
+
+} } } // End namespaces detail, iostreams, boost.
+
+#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CHAINBUF_HPP_INCLUDED