Ugly, not-to-be-pushed sucking in of all of Boost to get windows to work.
[dyninst.git] / external / boost / iostreams / write.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_WRITE_HPP_INCLUDED
8 #define BOOST_IOSTREAMS_WRITE_HPP_INCLUDED
9
10 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
11 # pragma once
12 #endif
13
14 #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.
15 #include <boost/detail/workaround.hpp>
16 #include <boost/iostreams/categories.hpp>
17 #include <boost/iostreams/detail/char_traits.hpp>
18 #include <boost/iostreams/detail/dispatch.hpp>
19 #include <boost/iostreams/detail/ios.hpp>  // streamsize.
20 #include <boost/iostreams/detail/streambuf.hpp>
21 #include <boost/iostreams/detail/wrap_unwrap.hpp>
22 #include <boost/iostreams/operations_fwd.hpp>
23 #include <boost/iostreams/traits.hpp>
24 #include <boost/mpl/if.hpp>
25
26 // Must come last.
27 #include <boost/iostreams/detail/config/disable_warnings.hpp>
28
29 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-----------------------------------//
30 # include <boost/iostreams/detail/vc6/write.hpp>
31 #else // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //--------------------------//
32
33 namespace boost { namespace iostreams {
34
35 namespace detail {
36
37 template<typename T> 
38 struct write_device_impl;
39
40 template<typename T> 
41 struct write_filter_impl;
42
43 } // End namespace detail.
44
45 template<typename T>
46 bool put(T& t, typename char_type_of<T>::type c)
47 { return detail::write_device_impl<T>::put(detail::unwrap(t), c); }
48
49 template<typename T>
50 inline std::streamsize write
51     (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
52 { return detail::write_device_impl<T>::write(detail::unwrap(t), s, n); }
53
54 template<typename T, typename Sink>
55 inline std::streamsize
56 write( T& t, Sink& snk, const typename char_type_of<T>::type* s, 
57        std::streamsize n )
58 { return detail::write_filter_impl<T>::write(detail::unwrap(t), snk, s, n); }
59
60 namespace detail {
61
62 //------------------Definition of write_device_impl---------------------------//
63
64 template<typename T>
65 struct write_device_impl
66     : mpl::if_<
67           is_custom<T>,
68           operations<T>,
69           write_device_impl<
70               BOOST_DEDUCED_TYPENAME
71               dispatch<
72                   T, ostream_tag, streambuf_tag, output
73               >::type
74           >
75       >::type
76     { };
77
78 template<>
79 struct write_device_impl<ostream_tag> {
80     template<typename T>
81     static bool put(T& t, typename char_type_of<T>::type c)
82     {
83         typedef typename char_type_of<T>::type          char_type;
84         typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)  traits_type;
85         return !traits_type::eq_int_type( t.rdbuf()->s.sputc(),
86                                           traits_type::eof() );
87     }
88
89     template<typename T>
90     static std::streamsize write
91         (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
92     { return t.rdbuf()->sputn(s, n); }
93 };
94
95 template<>
96 struct write_device_impl<streambuf_tag> {
97     template<typename T>
98     static bool put(T& t, typename char_type_of<T>::type c)
99     {
100         typedef typename char_type_of<T>::type          char_type;
101         typedef BOOST_IOSTREAMS_CHAR_TRAITS(char_type)  traits_type;
102         return !traits_type::eq_int_type(t.sputc(c), traits_type::eof());
103     }
104
105     template<typename T>
106     static std::streamsize write
107         (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
108     { return t.sputn(s, n); }
109 };
110
111 template<>
112 struct write_device_impl<output> {
113     template<typename T>
114     static bool put(T& t, typename char_type_of<T>::type c)
115     { return t.write(&c, 1) == 1; }
116
117     template<typename T>
118     static std::streamsize
119     write(T& t, const typename char_type_of<T>::type* s, std::streamsize n)
120     { return t.write(s, n); }
121 };
122
123 //------------------Definition of write_filter_impl---------------------------//
124
125 template<typename T>
126 struct write_filter_impl
127     : mpl::if_<
128           is_custom<T>,
129           operations<T>,
130           write_filter_impl<
131               BOOST_DEDUCED_TYPENAME
132               dispatch<
133                   T, multichar_tag, any_tag
134               >::type
135           >
136       >::type
137     { };
138
139 template<>
140 struct write_filter_impl<multichar_tag> {
141     template<typename T, typename Sink>
142     static std::streamsize
143     write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
144            std::streamsize n )
145     { return t.write(snk, s, n); }
146 };
147
148 template<>
149 struct write_filter_impl<any_tag> {
150     template<typename T, typename Sink>
151     static std::streamsize
152     write( T& t, Sink& snk, const typename char_type_of<T>::type* s,
153            std::streamsize n )
154     {
155         for (std::streamsize off = 0; off < n; ++off)
156             if (!t.put(snk, s[off]))
157                 return off;
158         return n;
159     }
160 };
161
162 } // End namespace detail.
163
164 } } // End namespaces iostreams, boost.
165
166 #endif // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300) //-------------------------//
167
168 #include <boost/iostreams/detail/config/enable_warnings.hpp>
169
170 #endif // #ifndef BOOST_IOSTREAMS_WRITE_HPP_INCLUDED