| 6554 |
serge |
1 |
// Input streams -*- C++ -*- |
|
|
2 |
|
|
|
3 |
// Copyright (C) 2004-2015 Free Software Foundation, Inc. |
|
|
4 |
// |
|
|
5 |
// This file is part of the GNU ISO C++ Library. This library is free |
|
|
6 |
// software; you can redistribute it and/or modify it under the |
|
|
7 |
// terms of the GNU General Public License as published by the |
|
|
8 |
// Free Software Foundation; either version 3, or (at your option) |
|
|
9 |
// any later version. |
|
|
10 |
|
|
|
11 |
// This library is distributed in the hope that it will be useful, |
|
|
12 |
// but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
13 |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
|
14 |
// GNU General Public License for more details. |
|
|
15 |
|
|
|
16 |
// Under Section 7 of GPL version 3, you are granted additional |
|
|
17 |
// permissions described in the GCC Runtime Library Exception, version |
|
|
18 |
// 3.1, as published by the Free Software Foundation. |
|
|
19 |
|
|
|
20 |
// You should have received a copy of the GNU General Public License and |
|
|
21 |
// a copy of the GCC Runtime Library Exception along with this program; |
|
|
22 |
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
|
|
23 |
// . |
|
|
24 |
|
|
|
25 |
// |
|
|
26 |
// ISO C++ 14882: 27.6.1 Input streams |
|
|
27 |
// |
|
|
28 |
|
|
|
29 |
#include |
|
|
30 |
|
|
|
31 |
namespace std _GLIBCXX_VISIBILITY(default) |
|
|
32 |
{ |
|
|
33 |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
|
|
34 |
|
|
|
35 |
template<> |
|
|
36 |
basic_istream& |
|
|
37 |
basic_istream:: |
|
|
38 |
getline(char_type* __s, streamsize __n, char_type __delim) |
|
|
39 |
{ |
|
|
40 |
_M_gcount = 0; |
|
|
41 |
ios_base::iostate __err = ios_base::goodbit; |
|
|
42 |
sentry __cerb(*this, true); |
|
|
43 |
if (__cerb) |
|
|
44 |
{ |
|
|
45 |
__try |
|
|
46 |
{ |
|
|
47 |
const int_type __idelim = traits_type::to_int_type(__delim); |
|
|
48 |
const int_type __eof = traits_type::eof(); |
|
|
49 |
__streambuf_type* __sb = this->rdbuf(); |
|
|
50 |
int_type __c = __sb->sgetc(); |
|
|
51 |
|
|
|
52 |
while (_M_gcount + 1 < __n |
|
|
53 |
&& !traits_type::eq_int_type(__c, __eof) |
|
|
54 |
&& !traits_type::eq_int_type(__c, __idelim)) |
|
|
55 |
{ |
|
|
56 |
streamsize __size = std::min(streamsize(__sb->egptr() |
|
|
57 |
- __sb->gptr()), |
|
|
58 |
streamsize(__n - _M_gcount |
|
|
59 |
- 1)); |
|
|
60 |
if (__size > 1) |
|
|
61 |
{ |
|
|
62 |
const char_type* __p = traits_type::find(__sb->gptr(), |
|
|
63 |
__size, |
|
|
64 |
__delim); |
|
|
65 |
if (__p) |
|
|
66 |
__size = __p - __sb->gptr(); |
|
|
67 |
traits_type::copy(__s, __sb->gptr(), __size); |
|
|
68 |
__s += __size; |
|
|
69 |
__sb->__safe_gbump(__size); |
|
|
70 |
_M_gcount += __size; |
|
|
71 |
__c = __sb->sgetc(); |
|
|
72 |
} |
|
|
73 |
else |
|
|
74 |
{ |
|
|
75 |
*__s++ = traits_type::to_char_type(__c); |
|
|
76 |
++_M_gcount; |
|
|
77 |
__c = __sb->snextc(); |
|
|
78 |
} |
|
|
79 |
} |
|
|
80 |
|
|
|
81 |
if (traits_type::eq_int_type(__c, __eof)) |
|
|
82 |
__err |= ios_base::eofbit; |
|
|
83 |
else if (traits_type::eq_int_type(__c, __idelim)) |
|
|
84 |
{ |
|
|
85 |
++_M_gcount; |
|
|
86 |
__sb->sbumpc(); |
|
|
87 |
} |
|
|
88 |
else |
|
|
89 |
__err |= ios_base::failbit; |
|
|
90 |
} |
|
|
91 |
__catch(__cxxabiv1::__forced_unwind&) |
|
|
92 |
{ |
|
|
93 |
this->_M_setstate(ios_base::badbit); |
|
|
94 |
__throw_exception_again; |
|
|
95 |
} |
|
|
96 |
__catch(...) |
|
|
97 |
{ this->_M_setstate(ios_base::badbit); } |
|
|
98 |
} |
|
|
99 |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
|
|
100 |
// 243. get and getline when sentry reports failure. |
|
|
101 |
if (__n > 0) |
|
|
102 |
*__s = char_type(); |
|
|
103 |
if (!_M_gcount) |
|
|
104 |
__err |= ios_base::failbit; |
|
|
105 |
if (__err) |
|
|
106 |
this->setstate(__err); |
|
|
107 |
return *this; |
|
|
108 |
} |
|
|
109 |
|
|
|
110 |
template<> |
|
|
111 |
basic_istream& |
|
|
112 |
basic_istream:: |
|
|
113 |
ignore(streamsize __n, int_type __delim) |
|
|
114 |
{ |
|
|
115 |
if (traits_type::eq_int_type(__delim, traits_type::eof())) |
|
|
116 |
return ignore(__n); |
|
|
117 |
|
|
|
118 |
_M_gcount = 0; |
|
|
119 |
sentry __cerb(*this, true); |
|
|
120 |
if (__n > 0 && __cerb) |
|
|
121 |
{ |
|
|
122 |
ios_base::iostate __err = ios_base::goodbit; |
|
|
123 |
__try |
|
|
124 |
{ |
|
|
125 |
const char_type __cdelim = traits_type::to_char_type(__delim); |
|
|
126 |
const int_type __eof = traits_type::eof(); |
|
|
127 |
__streambuf_type* __sb = this->rdbuf(); |
|
|
128 |
int_type __c = __sb->sgetc(); |
|
|
129 |
|
|
|
130 |
bool __large_ignore = false; |
|
|
131 |
while (true) |
|
|
132 |
{ |
|
|
133 |
while (_M_gcount < __n |
|
|
134 |
&& !traits_type::eq_int_type(__c, __eof) |
|
|
135 |
&& !traits_type::eq_int_type(__c, __delim)) |
|
|
136 |
{ |
|
|
137 |
streamsize __size = std::min(streamsize(__sb->egptr() |
|
|
138 |
- __sb->gptr()), |
|
|
139 |
streamsize(__n - _M_gcount)); |
|
|
140 |
if (__size > 1) |
|
|
141 |
{ |
|
|
142 |
const char_type* __p = traits_type::find(__sb->gptr(), |
|
|
143 |
__size, |
|
|
144 |
__cdelim); |
|
|
145 |
if (__p) |
|
|
146 |
__size = __p - __sb->gptr(); |
|
|
147 |
__sb->__safe_gbump(__size); |
|
|
148 |
_M_gcount += __size; |
|
|
149 |
__c = __sb->sgetc(); |
|
|
150 |
} |
|
|
151 |
else |
|
|
152 |
{ |
|
|
153 |
++_M_gcount; |
|
|
154 |
__c = __sb->snextc(); |
|
|
155 |
} |
|
|
156 |
} |
|
|
157 |
if (__n == __gnu_cxx::__numeric_traits::__max |
|
|
158 |
&& !traits_type::eq_int_type(__c, __eof) |
|
|
159 |
&& !traits_type::eq_int_type(__c, __delim)) |
|
|
160 |
{ |
|
|
161 |
_M_gcount = |
|
|
162 |
__gnu_cxx::__numeric_traits::__min; |
|
|
163 |
__large_ignore = true; |
|
|
164 |
} |
|
|
165 |
else |
|
|
166 |
break; |
|
|
167 |
} |
|
|
168 |
|
|
|
169 |
if (__large_ignore) |
|
|
170 |
_M_gcount = __gnu_cxx::__numeric_traits::__max; |
|
|
171 |
|
|
|
172 |
if (traits_type::eq_int_type(__c, __eof)) |
|
|
173 |
__err |= ios_base::eofbit; |
|
|
174 |
else if (traits_type::eq_int_type(__c, __delim)) |
|
|
175 |
{ |
|
|
176 |
if (_M_gcount |
|
|
177 |
< __gnu_cxx::__numeric_traits::__max) |
|
|
178 |
++_M_gcount; |
|
|
179 |
__sb->sbumpc(); |
|
|
180 |
} |
|
|
181 |
} |
|
|
182 |
__catch(__cxxabiv1::__forced_unwind&) |
|
|
183 |
{ |
|
|
184 |
this->_M_setstate(ios_base::badbit); |
|
|
185 |
__throw_exception_again; |
|
|
186 |
} |
|
|
187 |
__catch(...) |
|
|
188 |
{ this->_M_setstate(ios_base::badbit); } |
|
|
189 |
if (__err) |
|
|
190 |
this->setstate(__err); |
|
|
191 |
} |
|
|
192 |
return *this; |
|
|
193 |
} |
|
|
194 |
|
|
|
195 |
template<> |
|
|
196 |
basic_istream& |
|
|
197 |
operator>>(basic_istream& __in, char* __s) |
|
|
198 |
{ |
|
|
199 |
typedef basic_istream __istream_type; |
|
|
200 |
typedef __istream_type::int_type __int_type; |
|
|
201 |
typedef __istream_type::char_type __char_type; |
|
|
202 |
typedef __istream_type::traits_type __traits_type; |
|
|
203 |
typedef __istream_type::__streambuf_type __streambuf_type; |
|
|
204 |
typedef __istream_type::__ctype_type __ctype_type; |
|
|
205 |
|
|
|
206 |
streamsize __extracted = 0; |
|
|
207 |
ios_base::iostate __err = ios_base::goodbit; |
|
|
208 |
__istream_type::sentry __cerb(__in, false); |
|
|
209 |
if (__cerb) |
|
|
210 |
{ |
|
|
211 |
__try |
|
|
212 |
{ |
|
|
213 |
// Figure out how many characters to extract. |
|
|
214 |
streamsize __num = __in.width(); |
|
|
215 |
if (__num <= 0) |
|
|
216 |
__num = __gnu_cxx::__numeric_traits::__max; |
|
|
217 |
|
|
|
218 |
const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); |
|
|
219 |
|
|
|
220 |
const __int_type __eof = __traits_type::eof(); |
|
|
221 |
__streambuf_type* __sb = __in.rdbuf(); |
|
|
222 |
__int_type __c = __sb->sgetc(); |
|
|
223 |
|
|
|
224 |
while (__extracted < __num - 1 |
|
|
225 |
&& !__traits_type::eq_int_type(__c, __eof) |
|
|
226 |
&& !__ct.is(ctype_base::space, |
|
|
227 |
__traits_type::to_char_type(__c))) |
|
|
228 |
{ |
|
|
229 |
streamsize __size = std::min(streamsize(__sb->egptr() |
|
|
230 |
- __sb->gptr()), |
|
|
231 |
streamsize(__num - __extracted |
|
|
232 |
- 1)); |
|
|
233 |
if (__size > 1) |
|
|
234 |
{ |
|
|
235 |
__size = (__ct.scan_is(ctype_base::space, |
|
|
236 |
__sb->gptr() + 1, |
|
|
237 |
__sb->gptr() + __size) |
|
|
238 |
- __sb->gptr()); |
|
|
239 |
__traits_type::copy(__s, __sb->gptr(), __size); |
|
|
240 |
__s += __size; |
|
|
241 |
__sb->__safe_gbump(__size); |
|
|
242 |
__extracted += __size; |
|
|
243 |
__c = __sb->sgetc(); |
|
|
244 |
} |
|
|
245 |
else |
|
|
246 |
{ |
|
|
247 |
*__s++ = __traits_type::to_char_type(__c); |
|
|
248 |
++__extracted; |
|
|
249 |
__c = __sb->snextc(); |
|
|
250 |
} |
|
|
251 |
} |
|
|
252 |
|
|
|
253 |
if (__traits_type::eq_int_type(__c, __eof)) |
|
|
254 |
__err |= ios_base::eofbit; |
|
|
255 |
|
|
|
256 |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
|
|
257 |
// 68. Extractors for char* should store null at end |
|
|
258 |
*__s = __char_type(); |
|
|
259 |
__in.width(0); |
|
|
260 |
} |
|
|
261 |
__catch(__cxxabiv1::__forced_unwind&) |
|
|
262 |
{ |
|
|
263 |
__in._M_setstate(ios_base::badbit); |
|
|
264 |
__throw_exception_again; |
|
|
265 |
} |
|
|
266 |
__catch(...) |
|
|
267 |
{ __in._M_setstate(ios_base::badbit); } |
|
|
268 |
} |
|
|
269 |
if (!__extracted) |
|
|
270 |
__err |= ios_base::failbit; |
|
|
271 |
if (__err) |
|
|
272 |
__in.setstate(__err); |
|
|
273 |
return __in; |
|
|
274 |
} |
|
|
275 |
|
|
|
276 |
#ifdef _GLIBCXX_USE_WCHAR_T |
|
|
277 |
template<> |
|
|
278 |
basic_istream& |
|
|
279 |
basic_istream:: |
|
|
280 |
getline(char_type* __s, streamsize __n, char_type __delim) |
|
|
281 |
{ |
|
|
282 |
_M_gcount = 0; |
|
|
283 |
ios_base::iostate __err = ios_base::goodbit; |
|
|
284 |
sentry __cerb(*this, true); |
|
|
285 |
if (__cerb) |
|
|
286 |
{ |
|
|
287 |
__try |
|
|
288 |
{ |
|
|
289 |
const int_type __idelim = traits_type::to_int_type(__delim); |
|
|
290 |
const int_type __eof = traits_type::eof(); |
|
|
291 |
__streambuf_type* __sb = this->rdbuf(); |
|
|
292 |
int_type __c = __sb->sgetc(); |
|
|
293 |
|
|
|
294 |
while (_M_gcount + 1 < __n |
|
|
295 |
&& !traits_type::eq_int_type(__c, __eof) |
|
|
296 |
&& !traits_type::eq_int_type(__c, __idelim)) |
|
|
297 |
{ |
|
|
298 |
streamsize __size = std::min(streamsize(__sb->egptr() |
|
|
299 |
- __sb->gptr()), |
|
|
300 |
streamsize(__n - _M_gcount |
|
|
301 |
- 1)); |
|
|
302 |
if (__size > 1) |
|
|
303 |
{ |
|
|
304 |
const char_type* __p = traits_type::find(__sb->gptr(), |
|
|
305 |
__size, |
|
|
306 |
__delim); |
|
|
307 |
if (__p) |
|
|
308 |
__size = __p - __sb->gptr(); |
|
|
309 |
traits_type::copy(__s, __sb->gptr(), __size); |
|
|
310 |
__s += __size; |
|
|
311 |
__sb->__safe_gbump(__size); |
|
|
312 |
_M_gcount += __size; |
|
|
313 |
__c = __sb->sgetc(); |
|
|
314 |
} |
|
|
315 |
else |
|
|
316 |
{ |
|
|
317 |
*__s++ = traits_type::to_char_type(__c); |
|
|
318 |
++_M_gcount; |
|
|
319 |
__c = __sb->snextc(); |
|
|
320 |
} |
|
|
321 |
} |
|
|
322 |
|
|
|
323 |
if (traits_type::eq_int_type(__c, __eof)) |
|
|
324 |
__err |= ios_base::eofbit; |
|
|
325 |
else if (traits_type::eq_int_type(__c, __idelim)) |
|
|
326 |
{ |
|
|
327 |
++_M_gcount; |
|
|
328 |
__sb->sbumpc(); |
|
|
329 |
} |
|
|
330 |
else |
|
|
331 |
__err |= ios_base::failbit; |
|
|
332 |
} |
|
|
333 |
__catch(__cxxabiv1::__forced_unwind&) |
|
|
334 |
{ |
|
|
335 |
this->_M_setstate(ios_base::badbit); |
|
|
336 |
__throw_exception_again; |
|
|
337 |
} |
|
|
338 |
__catch(...) |
|
|
339 |
{ this->_M_setstate(ios_base::badbit); } |
|
|
340 |
} |
|
|
341 |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
|
|
342 |
// 243. get and getline when sentry reports failure. |
|
|
343 |
if (__n > 0) |
|
|
344 |
*__s = char_type(); |
|
|
345 |
if (!_M_gcount) |
|
|
346 |
__err |= ios_base::failbit; |
|
|
347 |
if (__err) |
|
|
348 |
this->setstate(__err); |
|
|
349 |
return *this; |
|
|
350 |
} |
|
|
351 |
|
|
|
352 |
template<> |
|
|
353 |
basic_istream& |
|
|
354 |
basic_istream:: |
|
|
355 |
ignore(streamsize __n, int_type __delim) |
|
|
356 |
{ |
|
|
357 |
if (traits_type::eq_int_type(__delim, traits_type::eof())) |
|
|
358 |
return ignore(__n); |
|
|
359 |
|
|
|
360 |
_M_gcount = 0; |
|
|
361 |
sentry __cerb(*this, true); |
|
|
362 |
if (__n > 0 && __cerb) |
|
|
363 |
{ |
|
|
364 |
ios_base::iostate __err = ios_base::goodbit; |
|
|
365 |
__try |
|
|
366 |
{ |
|
|
367 |
const char_type __cdelim = traits_type::to_char_type(__delim); |
|
|
368 |
const int_type __eof = traits_type::eof(); |
|
|
369 |
__streambuf_type* __sb = this->rdbuf(); |
|
|
370 |
int_type __c = __sb->sgetc(); |
|
|
371 |
|
|
|
372 |
bool __large_ignore = false; |
|
|
373 |
while (true) |
|
|
374 |
{ |
|
|
375 |
while (_M_gcount < __n |
|
|
376 |
&& !traits_type::eq_int_type(__c, __eof) |
|
|
377 |
&& !traits_type::eq_int_type(__c, __delim)) |
|
|
378 |
{ |
|
|
379 |
streamsize __size = std::min(streamsize(__sb->egptr() |
|
|
380 |
- __sb->gptr()), |
|
|
381 |
streamsize(__n - _M_gcount)); |
|
|
382 |
if (__size > 1) |
|
|
383 |
{ |
|
|
384 |
const char_type* __p = traits_type::find(__sb->gptr(), |
|
|
385 |
__size, |
|
|
386 |
__cdelim); |
|
|
387 |
if (__p) |
|
|
388 |
__size = __p - __sb->gptr(); |
|
|
389 |
__sb->__safe_gbump(__size); |
|
|
390 |
_M_gcount += __size; |
|
|
391 |
__c = __sb->sgetc(); |
|
|
392 |
} |
|
|
393 |
else |
|
|
394 |
{ |
|
|
395 |
++_M_gcount; |
|
|
396 |
__c = __sb->snextc(); |
|
|
397 |
} |
|
|
398 |
} |
|
|
399 |
if (__n == __gnu_cxx::__numeric_traits::__max |
|
|
400 |
&& !traits_type::eq_int_type(__c, __eof) |
|
|
401 |
&& !traits_type::eq_int_type(__c, __delim)) |
|
|
402 |
{ |
|
|
403 |
_M_gcount = |
|
|
404 |
__gnu_cxx::__numeric_traits::__min; |
|
|
405 |
__large_ignore = true; |
|
|
406 |
} |
|
|
407 |
else |
|
|
408 |
break; |
|
|
409 |
} |
|
|
410 |
|
|
|
411 |
if (__large_ignore) |
|
|
412 |
_M_gcount = __gnu_cxx::__numeric_traits::__max; |
|
|
413 |
|
|
|
414 |
if (traits_type::eq_int_type(__c, __eof)) |
|
|
415 |
__err |= ios_base::eofbit; |
|
|
416 |
else if (traits_type::eq_int_type(__c, __delim)) |
|
|
417 |
{ |
|
|
418 |
if (_M_gcount |
|
|
419 |
< __gnu_cxx::__numeric_traits::__max) |
|
|
420 |
++_M_gcount; |
|
|
421 |
__sb->sbumpc(); |
|
|
422 |
} |
|
|
423 |
} |
|
|
424 |
__catch(__cxxabiv1::__forced_unwind&) |
|
|
425 |
{ |
|
|
426 |
this->_M_setstate(ios_base::badbit); |
|
|
427 |
__throw_exception_again; |
|
|
428 |
} |
|
|
429 |
__catch(...) |
|
|
430 |
{ this->_M_setstate(ios_base::badbit); } |
|
|
431 |
if (__err) |
|
|
432 |
this->setstate(__err); |
|
|
433 |
} |
|
|
434 |
return *this; |
|
|
435 |
} |
|
|
436 |
#endif |
|
|
437 |
|
|
|
438 |
|
|
|
439 |
_GLIBCXX_END_NAMESPACE_VERSION |
|
|
440 |
} // namespace |