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_FILE_HPP_INCLUDED |
9 | #define BOOST_IOSTREAMS_FILE_HPP_INCLUDED |
10 | |
11 | #if defined(_MSC_VER) |
12 | # pragma once |
13 | #endif |
14 | |
15 | #include <boost/iostreams/detail/config/wide_streams.hpp> |
16 | #ifndef BOOST_IOSTREAMS_NO_LOCALE |
17 | # include <locale> |
18 | #endif |
19 | #include <string> // pathnames, char_traits. |
20 | #include <boost/iostreams/categories.hpp> |
21 | #include <boost/iostreams/detail/ios.hpp> // openmode, seekdir, int types. |
22 | #include <boost/iostreams/detail/fstream.hpp> |
23 | #include <boost/iostreams/operations.hpp> // seek. |
24 | #include <boost/shared_ptr.hpp> |
25 | |
26 | // Must come last. |
27 | #include <boost/iostreams/detail/config/disable_warnings.hpp> // MSVC. |
28 | |
29 | namespace boost { namespace iostreams { |
30 | |
31 | template<typename Ch> |
32 | class basic_file { |
33 | public: |
34 | typedef Ch char_type; |
35 | struct category |
36 | : public seekable_device_tag, |
37 | public closable_tag, |
38 | public localizable_tag, |
39 | public flushable_tag |
40 | { }; |
41 | basic_file( const std::string& path, |
42 | BOOST_IOS::openmode mode = |
43 | BOOST_IOS::in | BOOST_IOS::out, |
44 | BOOST_IOS::openmode base_mode = |
45 | BOOST_IOS::in | BOOST_IOS::out ); |
46 | std::streamsize read(char_type* s, std::streamsize n); |
47 | bool putback(char_type c); |
48 | std::streamsize write(const char_type* s, std::streamsize n); |
49 | std::streampos seek( stream_offset off, BOOST_IOS::seekdir way, |
50 | BOOST_IOS::openmode which = |
51 | BOOST_IOS::in | BOOST_IOS::out ); |
52 | void open( const std::string& path, |
53 | BOOST_IOS::openmode mode = |
54 | BOOST_IOS::in | BOOST_IOS::out, |
55 | BOOST_IOS::openmode base_mode = |
56 | BOOST_IOS::in | BOOST_IOS::out ); |
57 | bool is_open() const; |
58 | void close(); |
59 | bool flush(); |
60 | #ifndef BOOST_IOSTREAMS_NO_LOCALE |
61 | void imbue(const std::locale& loc) { pimpl_->file_.pubimbue(loc); } |
62 | #endif |
63 | private: |
64 | struct impl { |
65 | impl(const std::string& path, BOOST_IOS::openmode mode) |
66 | { file_.open(path.c_str(), mode); } |
67 | ~impl() { if (file_.is_open()) file_.close(); } |
68 | BOOST_IOSTREAMS_BASIC_FILEBUF(Ch) file_; |
69 | }; |
70 | shared_ptr<impl> pimpl_; |
71 | }; |
72 | |
73 | typedef basic_file<char> file; |
74 | typedef basic_file<wchar_t> wfile; |
75 | |
76 | template<typename Ch> |
77 | struct basic_file_source : private basic_file<Ch> { |
78 | typedef Ch char_type; |
79 | struct category |
80 | : input_seekable, |
81 | device_tag, |
82 | closable_tag |
83 | { }; |
84 | using basic_file<Ch>::read; |
85 | using basic_file<Ch>::putback; |
86 | using basic_file<Ch>::seek; |
87 | using basic_file<Ch>::is_open; |
88 | using basic_file<Ch>::close; |
89 | basic_file_source( const std::string& path, |
90 | BOOST_IOS::openmode mode = |
91 | BOOST_IOS::in ) |
92 | : basic_file<Ch>(path, mode & ~BOOST_IOS::out, BOOST_IOS::in) |
93 | { } |
94 | void open( const std::string& path, |
95 | BOOST_IOS::openmode mode = BOOST_IOS::in ) |
96 | { |
97 | basic_file<Ch>::open(path, mode & ~BOOST_IOS::out, BOOST_IOS::in); |
98 | } |
99 | }; |
100 | |
101 | typedef basic_file_source<char> file_source; |
102 | typedef basic_file_source<wchar_t> wfile_source; |
103 | |
104 | template<typename Ch> |
105 | struct basic_file_sink : private basic_file<Ch> { |
106 | typedef Ch char_type; |
107 | struct category |
108 | : output_seekable, |
109 | device_tag, |
110 | closable_tag, |
111 | flushable_tag |
112 | { }; |
113 | using basic_file<Ch>::write; |
114 | using basic_file<Ch>::seek; |
115 | using basic_file<Ch>::is_open; |
116 | using basic_file<Ch>::close; |
117 | using basic_file<Ch>::flush; |
118 | basic_file_sink( const std::string& path, |
119 | BOOST_IOS::openmode mode = BOOST_IOS::out ) |
120 | : basic_file<Ch>(path, mode & ~BOOST_IOS::in, BOOST_IOS::out) |
121 | { } |
122 | void open( const std::string& path, |
123 | BOOST_IOS::openmode mode = BOOST_IOS::out ) |
124 | { |
125 | basic_file<Ch>::open(path, mode & ~BOOST_IOS::in, BOOST_IOS::out); |
126 | } |
127 | }; |
128 | |
129 | typedef basic_file_sink<char> file_sink; |
130 | typedef basic_file_sink<wchar_t> wfile_sink; |
131 | |
132 | //------------------Implementation of basic_file------------------------------// |
133 | |
134 | template<typename Ch> |
135 | basic_file<Ch>::basic_file |
136 | ( const std::string& path, BOOST_IOS::openmode mode, |
137 | BOOST_IOS::openmode base_mode ) |
138 | { |
139 | open(path, mode, base_mode); |
140 | } |
141 | |
142 | template<typename Ch> |
143 | inline std::streamsize basic_file<Ch>::read |
144 | (char_type* s, std::streamsize n) |
145 | { |
146 | std::streamsize result = pimpl_->file_.sgetn(s, n); |
147 | return result != 0 ? result : -1; |
148 | } |
149 | |
150 | template<typename Ch> |
151 | inline bool basic_file<Ch>::putback(char_type c) |
152 | { |
153 | return !!pimpl_->file_.sputbackc(c); |
154 | } |
155 | |
156 | template<typename Ch> |
157 | inline std::streamsize basic_file<Ch>::write |
158 | (const char_type* s, std::streamsize n) |
159 | { return pimpl_->file_.sputn(s, n); } |
160 | |
161 | template<typename Ch> |
162 | std::streampos basic_file<Ch>::seek |
163 | ( stream_offset off, BOOST_IOS::seekdir way, |
164 | BOOST_IOS::openmode ) |
165 | { return iostreams::seek(pimpl_->file_, off, way); } |
166 | |
167 | template<typename Ch> |
168 | void basic_file<Ch>::open |
169 | ( const std::string& path, BOOST_IOS::openmode mode, |
170 | BOOST_IOS::openmode base_mode ) |
171 | { |
172 | pimpl_.reset(new impl(path, mode | base_mode)); |
173 | } |
174 | |
175 | template<typename Ch> |
176 | bool basic_file<Ch>::is_open() const { return pimpl_->file_.is_open(); } |
177 | |
178 | template<typename Ch> |
179 | void basic_file<Ch>::close() { pimpl_->file_.close(); } |
180 | |
181 | template<typename Ch> |
182 | bool basic_file<Ch>::flush() |
183 | { return pimpl_->file_.BOOST_IOSTREAMS_PUBSYNC() == 0; } |
184 | |
185 | //----------------------------------------------------------------------------// |
186 | |
187 | } } // End namespaces iostreams, boost. |
188 | |
189 | #include <boost/iostreams/detail/config/enable_warnings.hpp> // MSVC |
190 | |
191 | #endif // #ifndef BOOST_IOSTREAMS_FILE_HPP_INCLUDED |
192 | |