1 | // (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 BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED |
9 | #define BOOST_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 <boost/config.hpp> // BOOST_DEDUCED_TYPENAME. |
17 | #include <boost/iostreams/detail/char_traits.hpp> |
18 | #include <boost/iostreams/detail/config/overload_resolution.hpp> |
19 | #include <boost/iostreams/detail/forward.hpp> |
20 | #include <boost/iostreams/detail/ios.hpp> // failure, streamsize. |
21 | #include <boost/iostreams/detail/streambuf/direct_streambuf.hpp> |
22 | #include <boost/iostreams/detail/streambuf/indirect_streambuf.hpp> |
23 | #include <boost/iostreams/traits.hpp> |
24 | #include <boost/static_assert.hpp> |
25 | #include <boost/throw_exception.hpp> |
26 | #include <boost/type_traits/is_convertible.hpp> |
27 | |
28 | // Must come last. |
29 | #include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC. |
30 | |
31 | namespace boost { namespace iostreams { namespace detail { |
32 | |
33 | template<typename T, typename Tr, typename Alloc, typename Mode> |
34 | struct stream_buffer_traits { |
35 | typedef typename |
36 | mpl::if_< |
37 | is_convertible< |
38 | BOOST_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 BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
49 | # include <boost/iostreams/detail/broken_overload_resolution/stream_buffer.hpp> |
50 | #else |
51 | |
52 | namespace boost { namespace iostreams { |
53 | |
54 | template< typename T, |
55 | typename Tr = |
56 | BOOST_IOSTREAMS_CHAR_TRAITS( |
57 | BOOST_DEDUCED_TYPENAME char_type_of<T>::type |
58 | ), |
59 | typename Alloc = |
60 | std::allocator< |
61 | BOOST_DEDUCED_TYPENAME char_type_of<T>::type |
62 | >, |
63 | typename Mode = BOOST_DEDUCED_TYPENAME mode_of<T>::type > |
64 | class stream_buffer |
65 | : public detail::stream_buffer_traits<T, Tr, Alloc, Mode>::type |
66 | { |
67 | private: |
68 | BOOST_STATIC_ASSERT(( |
69 | is_convertible< |
70 | BOOST_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; |
77 | public: |
78 | typedef typename char_type_of<T>::type char_type; |
79 | struct category |
80 | : Mode, |
81 | closable_tag, |
82 | streambuf_tag |
83 | { }; |
84 | BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) |
85 | public: |
86 | stream_buffer() { } |
87 | ~stream_buffer() |
88 | { |
89 | try { |
90 | if (this->is_open() && this->auto_close()) |
91 | this->close(); |
92 | } catch (...) { } |
93 | } |
94 | BOOST_IOSTREAMS_FORWARD( stream_buffer, open_impl, T, |
95 | BOOST_IOSTREAMS_PUSH_PARAMS, |
96 | BOOST_IOSTREAMS_PUSH_ARGS ) |
97 | T& operator*() { return *this->component(); } |
98 | T* operator->() { return this->component(); } |
99 | private: |
100 | void open_impl(const T& t BOOST_IOSTREAMS_PUSH_PARAMS()) |
101 | { // Used for forwarding. |
102 | if (this->is_open()) |
103 | boost::throw_exception( |
104 | BOOST_IOSTREAMS_FAILURE("already open" ) |
105 | ); |
106 | base_type::open(t BOOST_IOSTREAMS_PUSH_ARGS()); |
107 | } |
108 | }; |
109 | |
110 | } } // End namespaces iostreams, boost. |
111 | |
112 | #endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
113 | |
114 | #include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC. |
115 | |
116 | #endif // #ifndef BOOST_IOSTREAMS_STREAM_BUFFER_HPP_INCLUDED |
117 | |