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_HPP_INCLUDED |
9 | #define BOOST_IOSTREAMS_STREAM_HPP_INCLUDED |
10 | |
11 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
12 | # pragma once |
13 | #endif |
14 | |
15 | #include <boost/iostreams/constants.hpp> |
16 | #include <boost/iostreams/detail/char_traits.hpp> |
17 | #include <boost/iostreams/detail/config/overload_resolution.hpp> |
18 | #include <boost/iostreams/detail/forward.hpp> |
19 | #include <boost/iostreams/detail/iostream.hpp> // standard streams. |
20 | #include <boost/iostreams/detail/select.hpp> |
21 | #include <boost/iostreams/stream_buffer.hpp> |
22 | #include <boost/mpl/and.hpp> |
23 | #include <boost/type_traits/is_convertible.hpp> |
24 | #include <boost/utility/base_from_member.hpp> |
25 | |
26 | namespace boost { namespace iostreams { namespace detail { |
27 | |
28 | template<typename Device, typename Tr> |
29 | struct stream_traits { |
30 | typedef typename char_type_of<Device>::type char_type; |
31 | typedef Tr traits_type; |
32 | typedef typename category_of<Device>::type mode; |
33 | typedef typename |
34 | iostreams::select< // Disambiguation required for Tru64. |
35 | mpl::and_< |
36 | is_convertible<mode, input>, |
37 | is_convertible<mode, output> |
38 | >, |
39 | BOOST_IOSTREAMS_BASIC_IOSTREAM(char_type, traits_type), |
40 | is_convertible<mode, input>, |
41 | BOOST_IOSTREAMS_BASIC_ISTREAM(char_type, traits_type), |
42 | else_, |
43 | BOOST_IOSTREAMS_BASIC_OSTREAM(char_type, traits_type) |
44 | >::type stream_type; |
45 | typedef typename |
46 | iostreams::select< // Disambiguation required for Tru64. |
47 | mpl::and_< |
48 | is_convertible<mode, input>, |
49 | is_convertible<mode, output> |
50 | >, |
51 | iostream_tag, |
52 | is_convertible<mode, input>, |
53 | istream_tag, |
54 | else_, |
55 | ostream_tag |
56 | >::type stream_tag; |
57 | }; |
58 | |
59 | // By encapsulating initialization in a base, we can define the macro |
60 | // BOOST_IOSTREAMS_DEFINE_FORWARDING_FUNCTIONS to generate constructors |
61 | // without base member initializer lists. |
62 | template< typename Device, |
63 | typename Tr = |
64 | BOOST_IOSTREAMS_CHAR_TRAITS( |
65 | BOOST_DEDUCED_TYPENAME char_type_of<Device>::type |
66 | ), |
67 | typename Alloc = |
68 | std::allocator< |
69 | BOOST_DEDUCED_TYPENAME char_type_of<Device>::type |
70 | >, |
71 | typename Base = // VC6 Workaround. |
72 | BOOST_DEDUCED_TYPENAME |
73 | detail::stream_traits<Device, Tr>::stream_type > |
74 | class stream_base |
75 | : protected base_from_member< stream_buffer<Device, Tr, Alloc> >, |
76 | public Base |
77 | { |
78 | private: |
79 | typedef base_from_member< stream_buffer<Device, Tr, Alloc> > pbase_type; |
80 | typedef typename stream_traits<Device, Tr>::stream_type stream_type; |
81 | protected: |
82 | using pbase_type::member; // Avoid warning about 'this' in initializer list. |
83 | public: |
84 | stream_base() : pbase_type(), stream_type(&member) { } |
85 | }; |
86 | |
87 | } } } // End namespaces detail, iostreams, boost. |
88 | |
89 | #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
90 | # include <boost/iostreams/detail/broken_overload_resolution/stream.hpp> |
91 | #else |
92 | |
93 | namespace boost { namespace iostreams { |
94 | |
95 | // |
96 | // Template name: stream. |
97 | // Description: A iostream which reads from and writes to an instance of a |
98 | // designated device type. |
99 | // Template parameters: |
100 | // Device - A device type. |
101 | // Alloc - The allocator type. |
102 | // |
103 | template< typename Device, |
104 | typename Tr = |
105 | BOOST_IOSTREAMS_CHAR_TRAITS( |
106 | BOOST_DEDUCED_TYPENAME char_type_of<Device>::type |
107 | ), |
108 | typename Alloc = |
109 | std::allocator< |
110 | BOOST_DEDUCED_TYPENAME char_type_of<Device>::type |
111 | > > |
112 | struct stream : detail::stream_base<Device, Tr, Alloc> { |
113 | public: |
114 | typedef typename char_type_of<Device>::type char_type; |
115 | struct category |
116 | : mode_of<Device>::type, |
117 | closable_tag, |
118 | detail::stream_traits<Device, Tr>::stream_tag |
119 | { }; |
120 | BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr) |
121 | private: |
122 | typedef typename |
123 | detail::stream_traits< |
124 | Device, Tr |
125 | >::stream_type stream_type; |
126 | public: |
127 | stream() { } |
128 | BOOST_IOSTREAMS_FORWARD( stream, open_impl, Device, |
129 | BOOST_IOSTREAMS_PUSH_PARAMS, |
130 | BOOST_IOSTREAMS_PUSH_ARGS ) |
131 | bool is_open() const { return this->member.is_open(); } |
132 | void close() { this->member.close(); } |
133 | bool auto_close() const { return this->member.auto_close(); } |
134 | void set_auto_close(bool close) { this->member.set_auto_close(close); } |
135 | bool strict_sync() { return this->member.strict_sync(); } |
136 | Device& operator*() { return *this->member; } |
137 | Device* operator->() { return &*this->member; } |
138 | Device* component() { return this->member.component(); } |
139 | private: |
140 | void open_impl(const Device& dev BOOST_IOSTREAMS_PUSH_PARAMS()) // For forwarding. |
141 | { |
142 | this->clear(); |
143 | this->member.open(dev BOOST_IOSTREAMS_PUSH_ARGS()); |
144 | } |
145 | }; |
146 | |
147 | } } // End namespaces iostreams, boost. |
148 | |
149 | #endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION |
150 | |
151 | #endif // #ifndef BOOST_IOSTREAMS_stream_HPP_INCLUDED |
152 | |