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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 |