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)
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
26namespace boost { namespace iostreams { namespace detail {
27
28template<typename Device, typename Tr>
29struct 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#if defined(BOOST_MSVC) && (BOOST_MSVC == 1700)
60# pragma warning(push)
61// https://connect.microsoft.com/VisualStudio/feedback/details/733720/
62# pragma warning(disable: 4250)
63#endif
64
65// By encapsulating initialization in a base, we can define the macro
66// BOOST_IOSTREAMS_DEFINE_FORWARDING_FUNCTIONS to generate constructors
67// without base member initializer lists.
68template< typename Device,
69 typename Tr =
70 BOOST_IOSTREAMS_CHAR_TRAITS(
71 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
72 ),
73 typename Alloc =
74 std::allocator<
75 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
76 >,
77 typename Base = // VC6 Workaround.
78 BOOST_DEDUCED_TYPENAME
79 detail::stream_traits<Device, Tr>::stream_type >
80class stream_base
81 : protected base_from_member< stream_buffer<Device, Tr, Alloc> >,
82 public Base
83{
84private:
85 typedef base_from_member< stream_buffer<Device, Tr, Alloc> > pbase_type;
86 typedef typename stream_traits<Device, Tr>::stream_type stream_type;
87protected:
88 using pbase_type::member; // Avoid warning about 'this' in initializer list.
89public:
90 stream_base() : pbase_type(), stream_type(&member) { }
91};
92
93#if defined(BOOST_MSVC) && (BOOST_MSVC == 1700)
94# pragma warning(pop)
95#endif
96
97} } } // End namespaces detail, iostreams, boost.
98
99#ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
100# include <boost/iostreams/detail/broken_overload_resolution/stream.hpp>
101#else
102
103namespace boost { namespace iostreams {
104
105#if defined(BOOST_MSVC) && (BOOST_MSVC == 1700)
106# pragma warning(push)
107// https://connect.microsoft.com/VisualStudio/feedback/details/733720/
108# pragma warning(disable: 4250)
109#endif
110
111//
112// Template name: stream.
113// Description: A iostream which reads from and writes to an instance of a
114// designated device type.
115// Template parameters:
116// Device - A device type.
117// Alloc - The allocator type.
118//
119template< typename Device,
120 typename Tr =
121 BOOST_IOSTREAMS_CHAR_TRAITS(
122 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
123 ),
124 typename Alloc =
125 std::allocator<
126 BOOST_DEDUCED_TYPENAME char_type_of<Device>::type
127 > >
128struct stream : detail::stream_base<Device, Tr, Alloc> {
129public:
130 typedef typename char_type_of<Device>::type char_type;
131 struct category
132 : mode_of<Device>::type,
133 closable_tag,
134 detail::stream_traits<Device, Tr>::stream_tag
135 { };
136 BOOST_IOSTREAMS_STREAMBUF_TYPEDEFS(Tr)
137private:
138 typedef typename
139 detail::stream_traits<
140 Device, Tr
141 >::stream_type stream_type;
142public:
143 stream() { }
144 BOOST_IOSTREAMS_FORWARD( stream, open_impl, Device,
145 BOOST_IOSTREAMS_PUSH_PARAMS,
146 BOOST_IOSTREAMS_PUSH_ARGS )
147 bool is_open() const { return this->member.is_open(); }
148 void close() { this->member.close(); }
149 bool auto_close() const { return this->member.auto_close(); }
150 void set_auto_close(bool close) { this->member.set_auto_close(close); }
151 bool strict_sync() { return this->member.strict_sync(); }
152 Device& operator*() { return *this->member; }
153 Device* operator->() { return &*this->member; }
154 Device* component() { return this->member.component(); }
155private:
156 void open_impl(const Device& dev BOOST_IOSTREAMS_PUSH_PARAMS()) // For forwarding.
157 {
158 this->clear();
159 this->member.open(dev BOOST_IOSTREAMS_PUSH_ARGS());
160 }
161};
162
163#if defined(BOOST_MSVC) && (BOOST_MSVC == 1700)
164# pragma warning(pop)
165#endif
166
167} } // End namespaces iostreams, boost.
168
169#endif // #ifdef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION
170
171#endif // #ifndef BOOST_IOSTREAMS_stream_HPP_INCLUDED
172

source code of boost/libs/iostreams/include/boost/iostreams/stream.hpp