source: mainline/uspace/lib/cpp/include/impl/istream.hpp@ a9caea1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since a9caea1 was a9caea1, checked in by Dzejrou <dzejrou@…>, 7 years ago

cpp: added some basic implementations to std::basic_istream, but for more locale and numeric_limits is needed
  • Property mode set to 100644
File size: 11.0 KB
Line 
1/*
2 * Copyright (c) 2017 Jaroslav Jindrak
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef LIBCPP_ISTREAM
30#define LIBCPP_ISTREAM
31
32#include <iosfwd>
33#include <utility>
34
35namespace std
36{
37
38 /**
39 * 27.7.2.1, class template basic_stream:
40 */
41
42 template<class Char, class Traits = char_traits<Char>>
43 class basic_istream: virtual public basic_ios<Char, Traits>
44 {
45 public:
46 using traits_type = Traits;
47 using char_type = Char;
48 using int_type = typename traits_type::int_type;
49 using pos_type = typename traits_type::pos_type;
50 using off_type = typename traits_type::off_type;
51
52 /**
53 * 27.7.2.1.1, constructor/destructor:
54 */
55
56 explicit basic_istream(basic_streambuf<Char, Traits>* sb)
57 : gcount_{0}
58 {
59 basic_ios::init(sb);
60 }
61
62 virtual ~basic_stream()
63 { /* DUMMY BODY */ }
64
65 /**
66 * 27.7.2.1.3, prefix/suffix:
67 */
68
69 class sentry
70 {
71 public:
72 explicit sentry(basic_istream<Char, Traits>& is, bool noskipws = false)
73 : ok_{false}
74 {
75 if (!is.good())
76 is.setstate(ios_base::failbit);
77 else
78 {
79 if (is.tie())
80 is.tie()->flush();
81
82 if (!noskipws && ((is.flags() & ios_base::skipws) != 0))
83 {
84 // TODO: implement when we have istream_iterator and locale,
85 // skip whitespace using is.locale()
86 }
87 }
88 }
89
90 ~sentry() = default;
91
92 explicit operator bool() const
93 {
94 return ok_;
95 }
96
97 sentry(const sentry&) = delete;
98 sentry& operator=(const sentry&) = delete;
99
100 private:
101 using traits_type = Traits;
102 bool ok_;
103 }
104
105 /**
106 * 27.7.2.2, formatted input:
107 */
108
109 basic_istream<Char, Traits> operator>>(
110 basic_istream<Char, Traits>& (*pf)(basic_istream<Char, Traits>&)
111 )
112 {
113 // TODO: implement
114 }
115
116 basic_istream<Char, Traits> operator>>(
117 basic_ios<Char, Traits>& (*pf)(basic_ios<Char, Traits>&)
118 )
119 {
120 // TODO: implement
121 }
122
123 basic_istream<Char, Traits> operator>>(
124 ios_base& (*pf)(ios_base&)
125 )
126 {
127 // TODO: implement
128 }
129
130 basic_istream<Char, Traits> operator>>(bool& x)
131 {
132 // TODO: implement
133 }
134
135 basic_istream<Char, Traits> operator>>(short& x)
136 {
137 // TODO: implement
138 }
139
140 basic_istream<Char, Traits> operator>>(unsigned short& x)
141 {
142 // TODO: implement
143 }
144
145 basic_istream<Char, Traits> operator>>(int& x)
146 {
147 // TODO: implement
148 }
149
150 basic_istream<Char, Traits> operator>>(unsigned int& x)
151 {
152 // TODO: implement
153 }
154
155 basic_istream<Char, Traits> operator>>(long& x)
156 {
157 // TODO: implement
158 }
159
160 basic_istream<Char, Traits> operator>>(unsigned long& x)
161 {
162 // TODO: implement
163 }
164
165 basic_istream<Char, Traits> operator>>(long long& x)
166 {
167 // TODO: implement
168 }
169
170 basic_istream<Char, Traits> operator>>(unsigned long long& x)
171 {
172 // TODO: implement
173 }
174
175 basic_istream<Char, Traits> operator>>(float& x)
176 {
177 // TODO: implement
178 }
179
180 basic_istream<Char, Traits> operator>>(double& x)
181 {
182 // TODO: implement
183 }
184
185 basic_istream<Char, Traits> operator>>(long double& x)
186 {
187 // TODO: implement
188 }
189
190 basic_istream<Char, Traits> operator>>(void*& p)
191 {
192 // TODO: implement
193 }
194
195 basic_istream<Char, Traits> operator>>(basic_streambuf<Char, Traits>* sb)
196 {
197 // TODO: implement
198 }
199
200 /**
201 * 27.7.2.3, unformatted input:
202 */
203
204 streamsize gcount() const
205 {
206 return gcount_;
207 }
208
209 int_type get()
210 {
211 // TODO: implement
212 }
213
214 basic_istream<Char, Traits>& get(char_type& c)
215 {
216 // TODO: implement
217 }
218
219 basic_istream<Char, Traits>& get(char_type* s, streamsize n)
220 {
221 // TODO: implement
222 }
223
224 basic_istream<Char, Traits>& get(char_type* s, streamsize n, char_type delim)
225 {
226 // TODO: implement
227 }
228
229 basic_istream<Char, Traits>& get(basic_streambuf<Char, Traits>& sb)
230 {
231 // TODO: implement
232 }
233
234 basic_istream<Char, Traits>& get(basic_streambuf<Char, Traits>& sb, char_type delim)
235 {
236 // TODO: implement
237 }
238
239 basic_istream<Char, Traits>& getline(char_type* s, streamsize n)
240 {
241 // TODO: implement
242 }
243
244 basic_istream<Char, Traits>& getline(char_type* s, streamsize n, char_type delim)
245 {
246 // TODO: implement
247 }
248
249 basic_istream<Char, Traits>& ignore(streamsize n = 1, int_type delim = traits_type::eof())
250 {
251 // TODO: implement
252 }
253
254 int_type peek()
255 {
256 // TODO: implement
257 }
258
259 basic_istream<Char, Traits>& read(char_type* s, streamsize n)
260 {
261 // TODO: implement
262 }
263
264 streamsize readsome(char_type* s, streamsize n)
265 {
266 // TODO: implement
267 }
268
269 basic_istream<Char, Traits>& putback(char_type c)
270 {
271 // TODO: implement
272 }
273
274 basic_istream<Char, Traits>& unget()
275 {
276 // TODO: implement
277 }
278
279 int sync()
280 {
281 // TODO: implement
282 }
283
284 pos_type tellg()
285 {
286 // TODO: implement
287 }
288
289 basic_istream<Char, Traits>& seekg(pos_type pos)
290 {
291 // TODO: implement
292 }
293
294 basic_istream<Char, Traits>& seekg(off_type off, ios_base::seekdir way)
295 {
296 // TODO: implement
297 }
298
299 protected:
300 streamsize gcount_;
301
302 basic_istream(const basic_istream&) = delete;
303
304 basic_istream(basic_istream&& rhs)
305 {
306 gcount_ = rhs.gcout_;
307
308 basic_ios::move(rhs);
309
310 rhs.gcount_ = 0;
311 }
312
313 /**
314 * 27.7.2.1.2, assign/swap:
315 */
316
317 basic_istream& operator=(const basic_istream& rhs) = delete;
318
319 basic_istream& operator=(basic_istream&& rhs)
320 {
321 swap(rhs);
322
323 return *this;
324 }
325
326 void swap(basic_stream& rhs)
327 {
328 basic_ios::swap(rhs);
329 swap(gcoung_, rhs.gcount_);
330 }
331 };
332
333 /**
334 * 27.7.2.2.3, character extraction templates:
335 */
336
337 template<class Char, class Traits>
338 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is,
339 Char& c)
340 {
341 // TODO: implement
342 }
343
344 template<class Char, class Traits>
345 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is,
346 unsigned char& c)
347 {
348 // TODO: implement
349 }
350
351 template<class Char, class Traits>
352 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is,
353 signed char& c)
354 {
355 // TODO: implement
356 }
357
358 template<class Char, class Traits>
359 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is,
360 Char* c)
361 {
362 // TODO: implement
363 }
364
365 template<class Char, class Traits>
366 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is,
367 unsigned char* c)
368 {
369 // TODO: implement
370 }
371
372 template<class Char, class Traits>
373 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is,
374 signed char* c)
375 {
376 // TODO: implement
377 }
378
379 using istream = basic_istream<char>;
380 using wistream = basic_istream<wchar_t>;
381
382 template<class Char, class Traits = char_traits<Char>>
383 class basic_iostream;
384
385 using iostream = basic_iostream<char>;
386 using wiostream = basic_iostream<wchar_t>;
387
388 template<class Char, class Traits = char_traits<Char>>
389 basic_istream<Char, Traits>& ws(basic_istream<Char, Traits>& is);
390
391 template<class Char, class Tratis = char_traits<Char>>
392 basic_istream<Char, Traits>& operator>>(basic_istream<Char, Traits>& is, T& x);
393}
394
395#endif
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