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1 | // | ||
2 | // Copyright (c) 2022 Vinnie Falco (vinnie.falco@gmail.com) | ||
3 | // | ||
4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
6 | // | ||
7 | // Official repository: https://github.com/cppalliance/http_proto | ||
8 | // | ||
9 | |||
10 | #include <boost/http_proto/file_stdio.hpp> | ||
11 | #include <boost/http_proto/error.hpp> | ||
12 | #include "detail/win32_unicode_path.hpp" | ||
13 | #include <boost/system/errc.hpp> | ||
14 | #include <boost/config/workaround.hpp> | ||
15 | #include <boost/core/exchange.hpp> | ||
16 | #include <limits> | ||
17 | |||
18 | namespace boost { | ||
19 | namespace http_proto { | ||
20 | |||
21 | 23 | file_stdio:: | |
22 | ~file_stdio() | ||
23 | { | ||
24 |
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23 | if(f_) |
25 | 11 | fclose(f_); | |
26 | 23 | } | |
27 | |||
28 | 1 | file_stdio:: | |
29 | file_stdio( | ||
30 | 1 | file_stdio&& other) noexcept | |
31 | 1 | : f_(boost::exchange(other.f_, nullptr)) | |
32 | { | ||
33 | 1 | } | |
34 | |||
35 | file_stdio& | ||
36 | 3 | file_stdio:: | |
37 | operator=( | ||
38 | file_stdio&& other) noexcept | ||
39 | { | ||
40 |
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3 | if(&other == this) |
41 | 1 | return *this; | |
42 |
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2 | if(f_) |
43 | 1 | fclose(f_); | |
44 | 2 | f_ = other.f_; | |
45 | 2 | other.f_ = nullptr; | |
46 | 2 | return *this; | |
47 | } | ||
48 | |||
49 | void | ||
50 | 1 | file_stdio:: | |
51 | native_handle(std::FILE* f) | ||
52 | { | ||
53 |
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1 | if(f_) |
54 | 1 | fclose(f_); | |
55 | 1 | f_ = f; | |
56 | 1 | } | |
57 | |||
58 | void | ||
59 | 4 | file_stdio:: | |
60 | close( | ||
61 | system::error_code& ec) | ||
62 | { | ||
63 |
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4 | if(f_) |
64 | { | ||
65 | 4 | int failed = fclose(f_); | |
66 | 4 | f_ = nullptr; | |
67 |
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4 | if(failed) |
68 | { | ||
69 | ✗ | ec.assign(errno, | |
70 | system::generic_category()); | ||
71 | ✗ | return; | |
72 | } | ||
73 | } | ||
74 | 4 | ec = {}; | |
75 | } | ||
76 | |||
77 | void | ||
78 | 21 | file_stdio:: | |
79 | open(char const* path, file_mode mode, | ||
80 | system::error_code& ec) | ||
81 | { | ||
82 |
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21 | if(f_) |
83 | { | ||
84 | 1 | fclose(f_); | |
85 | 1 | f_ = nullptr; | |
86 | } | ||
87 | 21 | ec = {}; | |
88 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
89 | boost::winapi::WCHAR_ const* s; | ||
90 | detail::win32_unicode_path unicode_path(path, ec); | ||
91 | if (ec) | ||
92 | return; | ||
93 | #else | ||
94 | char const* s; | ||
95 | #endif | ||
96 |
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21 | switch(mode) |
97 | { | ||
98 | 2 | default: | |
99 | case file_mode::read: | ||
100 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
101 | s = L"rb"; | ||
102 | #else | ||
103 | 2 | s = "rb"; | |
104 | #endif | ||
105 | 2 | break; | |
106 | |||
107 | 1 | case file_mode::scan: | |
108 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
109 | s = L"rbS"; | ||
110 | #else | ||
111 | 1 | s = "rb"; | |
112 | #endif | ||
113 | 1 | break; | |
114 | |||
115 | 10 | case file_mode::write: | |
116 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
117 | s = L"wb+"; | ||
118 | #else | ||
119 | 10 | s = "wb+"; | |
120 | #endif | ||
121 | 10 | break; | |
122 | |||
123 | 2 | case file_mode::write_new: | |
124 | { | ||
125 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
126 | # if (defined(BOOST_MSVC) && BOOST_MSVC >= 1910) || (defined(_MSVC_STL_VERSION) && _MSVC_STL_VERSION >= 141) | ||
127 | s = L"wbx"; | ||
128 | # else | ||
129 | std::FILE* f0; | ||
130 | auto const ev = ::_wfopen_s(&f0, unicode_path.c_str(), L"rb"); | ||
131 | if(! ev) | ||
132 | { | ||
133 | std::fclose(f0); | ||
134 | ec = make_error_code( | ||
135 | system::errc::file_exists); | ||
136 | return; | ||
137 | } | ||
138 | else if(ev != | ||
139 | system::errc::no_such_file_or_directory) | ||
140 | { | ||
141 | ec.assign(ev, | ||
142 | system::generic_category()); | ||
143 | return; | ||
144 | } | ||
145 | s = L"wb"; | ||
146 | # endif | ||
147 | #else | ||
148 | 2 | s = "wbx"; | |
149 | #endif | ||
150 | 2 | break; | |
151 | } | ||
152 | |||
153 | 2 | case file_mode::write_existing: | |
154 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
155 | s = L"rb+"; | ||
156 | #else | ||
157 | 2 | s = "rb+"; | |
158 | #endif | ||
159 | 2 | break; | |
160 | |||
161 | 2 | case file_mode::append: | |
162 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
163 | s = L"ab"; | ||
164 | #else | ||
165 | 2 | s = "ab"; | |
166 | #endif | ||
167 | 2 | break; | |
168 | |||
169 | 2 | case file_mode::append_existing: | |
170 | { | ||
171 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
172 | std::FILE* f0; | ||
173 | auto const ev = | ||
174 | ::_wfopen_s(&f0, unicode_path.c_str(), L"rb+"); | ||
175 | if(ev) | ||
176 | { | ||
177 | ec.assign(ev, | ||
178 | system::generic_category()); | ||
179 | return; | ||
180 | } | ||
181 | #else | ||
182 | auto const f0 = | ||
183 | 2 | std::fopen(path, "rb+"); | |
184 |
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2 | if(! f0) |
185 | { | ||
186 | 1 | ec.assign(errno, | |
187 | system::generic_category()); | ||
188 | 1 | return; | |
189 | } | ||
190 | #endif | ||
191 | 1 | std::fclose(f0); | |
192 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
193 | s = L"ab"; | ||
194 | #else | ||
195 | 1 | s = "ab"; | |
196 | #endif | ||
197 | 1 | break; | |
198 | } | ||
199 | } | ||
200 | |||
201 | #if defined(BOOST_MSVC) || defined(_MSVC_STL_VERSION) | ||
202 | auto const ev = ::_wfopen_s( | ||
203 | &f_, unicode_path.c_str(), s); | ||
204 | if(ev) | ||
205 | { | ||
206 | f_ = nullptr; | ||
207 | ec.assign(ev, | ||
208 | system::generic_category()); | ||
209 | return; | ||
210 | } | ||
211 | #else | ||
212 | 20 | f_ = std::fopen(path, s); | |
213 |
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20 | if(! f_) |
214 | { | ||
215 | 2 | ec.assign(errno, | |
216 | system::generic_category()); | ||
217 | 2 | return; | |
218 | } | ||
219 | #endif | ||
220 | } | ||
221 | |||
222 | std::uint64_t | ||
223 | 2 | file_stdio:: | |
224 | size( | ||
225 | system::error_code& ec) const | ||
226 | { | ||
227 |
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2 | if(! f_) |
228 | { | ||
229 | 1 | ec = make_error_code( | |
230 | system::errc::bad_file_descriptor); | ||
231 | 1 | return 0; | |
232 | } | ||
233 | 1 | long pos = std::ftell(f_); | |
234 |
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1 | if(pos == -1L) |
235 | { | ||
236 | ✗ | ec.assign(errno, | |
237 | system::generic_category()); | ||
238 | ✗ | return 0; | |
239 | } | ||
240 | 1 | int result = std::fseek(f_, 0, SEEK_END); | |
241 |
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1 | if(result != 0) |
242 | { | ||
243 | ✗ | ec.assign(errno, | |
244 | system::generic_category()); | ||
245 | ✗ | return 0; | |
246 | } | ||
247 | 1 | long size = std::ftell(f_); | |
248 |
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1 | if(size == -1L) |
249 | { | ||
250 | ✗ | ec.assign(errno, | |
251 | system::generic_category()); | ||
252 | ✗ | std::fseek(f_, pos, SEEK_SET); | |
253 | ✗ | return 0; | |
254 | } | ||
255 | 1 | result = std::fseek(f_, pos, SEEK_SET); | |
256 |
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1 | if(result != 0) |
257 | ✗ | ec.assign(errno, | |
258 | system::generic_category()); | ||
259 | else | ||
260 | 1 | ec = {}; | |
261 | 1 | return size; | |
262 | } | ||
263 | |||
264 | std::uint64_t | ||
265 | 3 | file_stdio:: | |
266 | pos( | ||
267 | system::error_code& ec) const | ||
268 | { | ||
269 |
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3 | if(! f_) |
270 | { | ||
271 | 1 | ec = make_error_code( | |
272 | system::errc::bad_file_descriptor); | ||
273 | 1 | return 0; | |
274 | } | ||
275 | 2 | long pos = std::ftell(f_); | |
276 |
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2 | if(pos == -1L) |
277 | { | ||
278 | ✗ | ec.assign(errno, | |
279 | system::generic_category()); | ||
280 | ✗ | return 0; | |
281 | } | ||
282 | 2 | ec = {}; | |
283 | 2 | return pos; | |
284 | } | ||
285 | |||
286 | void | ||
287 | 2 | file_stdio:: | |
288 | seek(std::uint64_t offset, | ||
289 | system::error_code& ec) | ||
290 | { | ||
291 |
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2 | if(! f_) |
292 | { | ||
293 | 1 | ec = make_error_code( | |
294 | system::errc::bad_file_descriptor); | ||
295 | 1 | return; | |
296 | } | ||
297 |
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1 | if(offset > static_cast<std::uint64_t>((std::numeric_limits<long>::max)())) |
298 | { | ||
299 | ✗ | ec = make_error_code( | |
300 | system::errc::invalid_seek); | ||
301 | ✗ | return; | |
302 | } | ||
303 | 1 | int result = std::fseek(f_, | |
304 | static_cast<long>(offset), SEEK_SET); | ||
305 |
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1 | if(result != 0) |
306 | ✗ | ec.assign(errno, | |
307 | system::generic_category()); | ||
308 | else | ||
309 | 1 | ec = {}; | |
310 | } | ||
311 | |||
312 | std::size_t | ||
313 | 3 | file_stdio:: | |
314 | read(void* buffer, std::size_t n, | ||
315 | system::error_code& ec) const | ||
316 | { | ||
317 |
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3 | if(! f_) |
318 | { | ||
319 | 1 | ec = make_error_code( | |
320 | system::errc::bad_file_descriptor); | ||
321 | 1 | return 0; | |
322 | } | ||
323 | 2 | auto nread = std::fread(buffer, 1, n, f_); | |
324 |
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2 | if(std::ferror(f_)) |
325 | { | ||
326 | ✗ | ec.assign(errno, | |
327 | system::generic_category()); | ||
328 | ✗ | return 0; | |
329 | } | ||
330 | 2 | return nread; | |
331 | } | ||
332 | |||
333 | std::size_t | ||
334 | 5 | file_stdio:: | |
335 | write(void const* buffer, std::size_t n, | ||
336 | system::error_code& ec) | ||
337 | { | ||
338 |
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5 | if(! f_) |
339 | { | ||
340 | 1 | ec = make_error_code( | |
341 | system::errc::bad_file_descriptor); | ||
342 | 1 | return 0; | |
343 | } | ||
344 | 4 | auto nwritten = std::fwrite(buffer, 1, n, f_); | |
345 |
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4 | if(std::ferror(f_)) |
346 | { | ||
347 | ✗ | ec.assign(errno, | |
348 | system::generic_category()); | ||
349 | ✗ | return 0; | |
350 | } | ||
351 | 4 | return nwritten; | |
352 | } | ||
353 | |||
354 | } // http_proto | ||
355 | } // boost | ||
356 |