blob: 8b129721fd9f911392f988c7bdda76db44d6b03c [file] [log] [blame]
Jeff Thompson86b6d642013-10-17 15:01:56 -07001// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
2// (C) Copyright 2003-2007 Jonathan Turkanis
3// Distributed under the Boost Software License, Version 1.0. (See accompanying
4// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
5
6// See http://www.boost.org/libs/iostreams for documentation.
7
8#ifndef NDNBOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
9#define NDNBOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED
10
11#if defined(_MSC_VER) && (_MSC_VER >= 1020)
12# pragma once
13#endif
14
15#include <memory> // allocator.
16#include <ndnboost/config.hpp> // NDNBOOST_DEDUCED_TYPENAME.
17#include <ndnboost/iostreams/detail/char_traits.hpp>
18#include <ndnboost/iostreams/detail/config/overload_resolution.hpp>
19#include <ndnboost/iostreams/detail/forward.hpp>
20#include <ndnboost/iostreams/detail/ios.hpp> // failure, streamsize.
21#include <ndnboost/iostreams/detail/streambuf/direct_streambuf.hpp>
22#include <ndnboost/iostreams/detail/streambuf/indirect_streambuf.hpp>
23#include <ndnboost/iostreams/traits.hpp>
24#include <ndnboost/static_assert.hpp>
25#include <ndnboost/throw_exception.hpp>
26#include <ndnboost/type_traits/is_convertible.hpp>
27
28// Must come last.
29#include <ndnboost/iostreams/detail/config/disable_warnings.hpp> // MSVC.
30
31namespace ndnboost { namespace iostreams { namespace detail {
32
33template<typename T, typename Tr, typename Alloc, typename Mode>
34struct stream_buffer_traits {
35 typedef typename
36 mpl::if_<
37 is_convertible<
38 NDNBOOST_DEDUCED_TYPENAME category_of<T>::type,
39 direct_tag
40 >,
41 direct_streambuf<T, Tr>,
42 indirect_streambuf<T, Tr, Alloc, Mode>
43 >::type type;
44};
45
46} } } // End namespaces detail, iostreams, boost
47
48#ifdef NDNBOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
49# include <ndnboost/iostreams/detail/broken_overload_resolution/stream_buffer.hpp>
50#else
51
52namespace ndnboost { namespace iostreams {
53
54template< typename T,
55 typename Tr =
56 NDNBOOST_IOSTREAMS_CHAR_TRAITS(
57 NDNBOOST_DEDUCED_TYPENAME char_type_of<T>::type
58 ),
59 typename Alloc =
60 std::allocator<
61 NDNBOOST_DEDUCED_TYPENAME char_type_of<T>::type
62 >,
63 typename Mode = NDNBOOST_DEDUCED_TYPENAME mode_of<T>::type >
64class stream_buffer
65 : public detail::stream_buffer_traits<T, Tr, Alloc, Mode>::type
66{
67private:
68 NDNBOOST_STATIC_ASSERT((
69 is_convertible<
70 NDNBOOST_DEDUCED_TYPENAME iostreams::category_of<T>::type, Mode
71 >::value
72 ));
73 typedef typename
74 detail::stream_buffer_traits<
75 T, Tr, Alloc, Mode
76 >::type base_type;
77public:
78 typedef typename char_type_of<T>::type char_type;
79 struct category
80 : Mode,
81 closable_tag,
82 streambuf_tag
83 { };
84 NDNBOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
85public:
86 stream_buffer() { }
87 ~stream_buffer()
88 {
89 try {
90 if (this->is_open() && this->auto_close())
91 this->close();
92 } catch (...) { }
93 }
94 NDNBOOST_IOSTREAMS_FORWARD( stream_buffer, open_impl, T,
95 NDNBOOST_IOSTREAMS_PUSH_PARAMS,
96 NDNBOOST_IOSTREAMS_PUSH_ARGS )
97 T& operator*() { return *this->component(); }
98 T* operator->() { return this->component(); }
99private:
100 void open_impl(const T& t NDNBOOST_IOSTREAMS_PUSH_PARAMS())
101 { // Used for forwarding.
102 if (this->is_open())
103 ndnboost::throw_exception(
104 NDNBOOST_IOSTREAMS_FAILURE("already open")
105 );
106 base_type::open(t NDNBOOST_IOSTREAMS_PUSH_ARGS());
107 }
108};
109
110} } // End namespaces iostreams, boost.
111
112#endif // #ifdef NDNBOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
113
114#include <ndnboost/iostreams/detail/config/enable_warnings.hpp> // MSVC.
115
116#endif // #ifndef NDNBOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED