Ugly, not-to-be-pushed sucking in of all of Boost to get windows to work.
[dyninst.git] / external / boost / iostreams / detail / streambuf / linked_streambuf.hpp
1 // (C) Copyright Jonathan Turkanis 2003.
2 // Distributed under the Boost Software License, Version 1.0. (See accompanying
3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
4
5 // See http://www.boost.org/libs/iostreams for documentation.
6
7 #ifndef BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
8 #define BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED
9
10 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
11 # pragma once
12 #endif
13
14 #include <typeinfo>
15 #include <boost/config.hpp>                        // member template friends.
16 #include <boost/iostreams/detail/char_traits.hpp>
17 #include <boost/iostreams/detail/ios.hpp>          // openmode.
18 #include <boost/iostreams/detail/streambuf.hpp>
19
20 // Must come last.
21 #include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC.
22
23 namespace boost { namespace iostreams { namespace detail {
24
25 template<typename Self, typename Ch, typename Tr, typename Alloc, typename Mode>
26 class chain_base;
27
28 template<typename Chain, typename Access, typename Mode> class chainbuf;
29
30 #define BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base) \
31     using base::eback; using base::gptr; using base::egptr; \
32     using base::setg; using base::gbump; using base::pbase; \
33     using base::pptr; using base::epptr; using base::setp; \
34     using base::pbump; using base::underflow; using base::pbackfail; \
35     using base::xsgetn; using base::overflow; using base::sputc; \
36     using base::xsputn; using base::sync; using base::seekoff; \
37     using base::seekpos; \
38     /**/
39
40 template<typename Ch, typename Tr = BOOST_IOSTREAMS_CHAR_TRAITS(Ch) >
41 class linked_streambuf : public BOOST_IOSTREAMS_BASIC_STREAMBUF(Ch, Tr) {
42 protected:
43     linked_streambuf() : true_eof_(false) { }
44     void set_true_eof(bool eof) { true_eof_ = eof; }
45 public:
46
47     // Should be called only after receiving an ordinary EOF indication,
48     // to confirm that it represents EOF rather than WOULD_BLOCK.
49     bool true_eof() const { return true_eof_; }
50 protected:
51
52     //----------grant friendship to chain_base and chainbuf-------------------//
53
54 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
55     template< typename Self, typename ChT, typename TrT,
56               typename Alloc, typename Mode >
57     friend class chain_base;
58     template<typename Chain, typename Mode, typename Access>
59     friend class chainbuf;
60 #else
61 public:
62     typedef BOOST_IOSTREAMS_BASIC_STREAMBUF(Ch, Tr) base;
63     BOOST_IOSTREAMS_USING_PROTECTED_STREAMBUF_MEMBERS(base)
64 #endif
65     virtual void set_next(linked_streambuf<Ch, Tr>* /* next */) { }
66     virtual void close(BOOST_IOS::openmode) = 0;
67     virtual bool auto_close() const = 0;
68     virtual void set_auto_close(bool) = 0;
69     virtual bool strict_sync() = 0;
70     virtual const std::type_info& component_type() const = 0;
71     virtual void* component_impl() = 0;
72 private:
73     bool true_eof_;
74 };
75
76 } } } // End namespaces detail, iostreams, boost.
77
78 #include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC.
79
80 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_LINKED_STREAMBUF_HPP_INCLUDED