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re PR c++/51930 (Explicitly instantiated template gets hidden visibility)
[thirdparty/gcc.git] / libstdc++-v3 / src / c++98 / istream.cc
1 // Input streams -*- C++ -*-
2
3 // Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
4 // Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
20
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
25
26 //
27 // ISO C++ 14882: 27.6.1 Input streams
28 //
29
30 #include <istream>
31
32 namespace std _GLIBCXX_VISIBILITY(default)
33 {
34 _GLIBCXX_BEGIN_NAMESPACE_VERSION
35
36 template<>
37 basic_istream<char>&
38 basic_istream<char>::
39 getline(char_type* __s, streamsize __n, char_type __delim)
40 {
41 _M_gcount = 0;
42 ios_base::iostate __err = ios_base::goodbit;
43 sentry __cerb(*this, true);
44 if (__cerb)
45 {
46 __try
47 {
48 const int_type __idelim = traits_type::to_int_type(__delim);
49 const int_type __eof = traits_type::eof();
50 __streambuf_type* __sb = this->rdbuf();
51 int_type __c = __sb->sgetc();
52
53 while (_M_gcount + 1 < __n
54 && !traits_type::eq_int_type(__c, __eof)
55 && !traits_type::eq_int_type(__c, __idelim))
56 {
57 streamsize __size = std::min(streamsize(__sb->egptr()
58 - __sb->gptr()),
59 streamsize(__n - _M_gcount
60 - 1));
61 if (__size > 1)
62 {
63 const char_type* __p = traits_type::find(__sb->gptr(),
64 __size,
65 __delim);
66 if (__p)
67 __size = __p - __sb->gptr();
68 traits_type::copy(__s, __sb->gptr(), __size);
69 __s += __size;
70 __sb->__safe_gbump(__size);
71 _M_gcount += __size;
72 __c = __sb->sgetc();
73 }
74 else
75 {
76 *__s++ = traits_type::to_char_type(__c);
77 ++_M_gcount;
78 __c = __sb->snextc();
79 }
80 }
81
82 if (traits_type::eq_int_type(__c, __eof))
83 __err |= ios_base::eofbit;
84 else if (traits_type::eq_int_type(__c, __idelim))
85 {
86 ++_M_gcount;
87 __sb->sbumpc();
88 }
89 else
90 __err |= ios_base::failbit;
91 }
92 __catch(__cxxabiv1::__forced_unwind&)
93 {
94 this->_M_setstate(ios_base::badbit);
95 __throw_exception_again;
96 }
97 __catch(...)
98 { this->_M_setstate(ios_base::badbit); }
99 }
100 // _GLIBCXX_RESOLVE_LIB_DEFECTS
101 // 243. get and getline when sentry reports failure.
102 if (__n > 0)
103 *__s = char_type();
104 if (!_M_gcount)
105 __err |= ios_base::failbit;
106 if (__err)
107 this->setstate(__err);
108 return *this;
109 }
110
111 template<>
112 basic_istream<char>&
113 basic_istream<char>::
114 ignore(streamsize __n, int_type __delim)
115 {
116 if (traits_type::eq_int_type(__delim, traits_type::eof()))
117 return ignore(__n);
118
119 _M_gcount = 0;
120 sentry __cerb(*this, true);
121 if (__n > 0 && __cerb)
122 {
123 ios_base::iostate __err = ios_base::goodbit;
124 __try
125 {
126 const char_type __cdelim = traits_type::to_char_type(__delim);
127 const int_type __eof = traits_type::eof();
128 __streambuf_type* __sb = this->rdbuf();
129 int_type __c = __sb->sgetc();
130
131 bool __large_ignore = false;
132 while (true)
133 {
134 while (_M_gcount < __n
135 && !traits_type::eq_int_type(__c, __eof)
136 && !traits_type::eq_int_type(__c, __delim))
137 {
138 streamsize __size = std::min(streamsize(__sb->egptr()
139 - __sb->gptr()),
140 streamsize(__n - _M_gcount));
141 if (__size > 1)
142 {
143 const char_type* __p = traits_type::find(__sb->gptr(),
144 __size,
145 __cdelim);
146 if (__p)
147 __size = __p - __sb->gptr();
148 __sb->__safe_gbump(__size);
149 _M_gcount += __size;
150 __c = __sb->sgetc();
151 }
152 else
153 {
154 ++_M_gcount;
155 __c = __sb->snextc();
156 }
157 }
158 if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max
159 && !traits_type::eq_int_type(__c, __eof)
160 && !traits_type::eq_int_type(__c, __delim))
161 {
162 _M_gcount =
163 __gnu_cxx::__numeric_traits<streamsize>::__min;
164 __large_ignore = true;
165 }
166 else
167 break;
168 }
169
170 if (__large_ignore)
171 _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max;
172
173 if (traits_type::eq_int_type(__c, __eof))
174 __err |= ios_base::eofbit;
175 else if (traits_type::eq_int_type(__c, __delim))
176 {
177 if (_M_gcount
178 < __gnu_cxx::__numeric_traits<streamsize>::__max)
179 ++_M_gcount;
180 __sb->sbumpc();
181 }
182 }
183 __catch(__cxxabiv1::__forced_unwind&)
184 {
185 this->_M_setstate(ios_base::badbit);
186 __throw_exception_again;
187 }
188 __catch(...)
189 { this->_M_setstate(ios_base::badbit); }
190 if (__err)
191 this->setstate(__err);
192 }
193 return *this;
194 }
195
196 template<>
197 basic_istream<char>&
198 operator>>(basic_istream<char>& __in, char* __s)
199 {
200 typedef basic_istream<char> __istream_type;
201 typedef __istream_type::int_type __int_type;
202 typedef __istream_type::char_type __char_type;
203 typedef __istream_type::traits_type __traits_type;
204 typedef __istream_type::__streambuf_type __streambuf_type;
205 typedef __istream_type::__ctype_type __ctype_type;
206
207 streamsize __extracted = 0;
208 ios_base::iostate __err = ios_base::goodbit;
209 __istream_type::sentry __cerb(__in, false);
210 if (__cerb)
211 {
212 __try
213 {
214 // Figure out how many characters to extract.
215 streamsize __num = __in.width();
216 if (__num <= 0)
217 __num = __gnu_cxx::__numeric_traits<streamsize>::__max;
218
219 const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
220
221 const __int_type __eof = __traits_type::eof();
222 __streambuf_type* __sb = __in.rdbuf();
223 __int_type __c = __sb->sgetc();
224
225 while (__extracted < __num - 1
226 && !__traits_type::eq_int_type(__c, __eof)
227 && !__ct.is(ctype_base::space,
228 __traits_type::to_char_type(__c)))
229 {
230 streamsize __size = std::min(streamsize(__sb->egptr()
231 - __sb->gptr()),
232 streamsize(__num - __extracted
233 - 1));
234 if (__size > 1)
235 {
236 __size = (__ct.scan_is(ctype_base::space,
237 __sb->gptr() + 1,
238 __sb->gptr() + __size)
239 - __sb->gptr());
240 __traits_type::copy(__s, __sb->gptr(), __size);
241 __s += __size;
242 __sb->__safe_gbump(__size);
243 __extracted += __size;
244 __c = __sb->sgetc();
245 }
246 else
247 {
248 *__s++ = __traits_type::to_char_type(__c);
249 ++__extracted;
250 __c = __sb->snextc();
251 }
252 }
253
254 if (__traits_type::eq_int_type(__c, __eof))
255 __err |= ios_base::eofbit;
256
257 // _GLIBCXX_RESOLVE_LIB_DEFECTS
258 // 68. Extractors for char* should store null at end
259 *__s = __char_type();
260 __in.width(0);
261 }
262 __catch(__cxxabiv1::__forced_unwind&)
263 {
264 __in._M_setstate(ios_base::badbit);
265 __throw_exception_again;
266 }
267 __catch(...)
268 { __in._M_setstate(ios_base::badbit); }
269 }
270 if (!__extracted)
271 __err |= ios_base::failbit;
272 if (__err)
273 __in.setstate(__err);
274 return __in;
275 }
276
277 template<>
278 basic_istream<char>&
279 operator>>(basic_istream<char>& __in, basic_string<char>& __str)
280 {
281 typedef basic_istream<char> __istream_type;
282 typedef __istream_type::int_type __int_type;
283 typedef __istream_type::traits_type __traits_type;
284 typedef __istream_type::__streambuf_type __streambuf_type;
285 typedef __istream_type::__ctype_type __ctype_type;
286 typedef basic_string<char> __string_type;
287 typedef __string_type::size_type __size_type;
288
289 __size_type __extracted = 0;
290 ios_base::iostate __err = ios_base::goodbit;
291 __istream_type::sentry __cerb(__in, false);
292 if (__cerb)
293 {
294 __try
295 {
296 __str.erase();
297 const streamsize __w = __in.width();
298 const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
299 : __str.max_size();
300 const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
301 const __int_type __eof = __traits_type::eof();
302 __streambuf_type* __sb = __in.rdbuf();
303 __int_type __c = __sb->sgetc();
304
305 while (__extracted < __n
306 && !__traits_type::eq_int_type(__c, __eof)
307 && !__ct.is(ctype_base::space,
308 __traits_type::to_char_type(__c)))
309 {
310 streamsize __size = std::min(streamsize(__sb->egptr()
311 - __sb->gptr()),
312 streamsize(__n - __extracted));
313 if (__size > 1)
314 {
315 __size = (__ct.scan_is(ctype_base::space,
316 __sb->gptr() + 1,
317 __sb->gptr() + __size)
318 - __sb->gptr());
319 __str.append(__sb->gptr(), __size);
320 __sb->__safe_gbump(__size);
321 __extracted += __size;
322 __c = __sb->sgetc();
323 }
324 else
325 {
326 __str += __traits_type::to_char_type(__c);
327 ++__extracted;
328 __c = __sb->snextc();
329 }
330 }
331
332 if (__traits_type::eq_int_type(__c, __eof))
333 __err |= ios_base::eofbit;
334 __in.width(0);
335 }
336 __catch(__cxxabiv1::__forced_unwind&)
337 {
338 __in._M_setstate(ios_base::badbit);
339 __throw_exception_again;
340 }
341 __catch(...)
342 {
343 // _GLIBCXX_RESOLVE_LIB_DEFECTS
344 // 91. Description of operator>> and getline() for string<>
345 // might cause endless loop
346 __in._M_setstate(ios_base::badbit);
347 }
348 }
349 if (!__extracted)
350 __err |= ios_base::failbit;
351 if (__err)
352 __in.setstate(__err);
353 return __in;
354 }
355
356 template<>
357 basic_istream<char>&
358 getline(basic_istream<char>& __in, basic_string<char>& __str,
359 char __delim)
360 {
361 typedef basic_istream<char> __istream_type;
362 typedef __istream_type::int_type __int_type;
363 typedef __istream_type::char_type __char_type;
364 typedef __istream_type::traits_type __traits_type;
365 typedef __istream_type::__streambuf_type __streambuf_type;
366 typedef basic_string<char> __string_type;
367 typedef __string_type::size_type __size_type;
368
369 __size_type __extracted = 0;
370 const __size_type __n = __str.max_size();
371 ios_base::iostate __err = ios_base::goodbit;
372 __istream_type::sentry __cerb(__in, true);
373 if (__cerb)
374 {
375 __try
376 {
377 __str.erase();
378 const __int_type __idelim = __traits_type::to_int_type(__delim);
379 const __int_type __eof = __traits_type::eof();
380 __streambuf_type* __sb = __in.rdbuf();
381 __int_type __c = __sb->sgetc();
382
383 while (__extracted < __n
384 && !__traits_type::eq_int_type(__c, __eof)
385 && !__traits_type::eq_int_type(__c, __idelim))
386 {
387 streamsize __size = std::min(streamsize(__sb->egptr()
388 - __sb->gptr()),
389 streamsize(__n - __extracted));
390 if (__size > 1)
391 {
392 const __char_type* __p = __traits_type::find(__sb->gptr(),
393 __size,
394 __delim);
395 if (__p)
396 __size = __p - __sb->gptr();
397 __str.append(__sb->gptr(), __size);
398 __sb->__safe_gbump(__size);
399 __extracted += __size;
400 __c = __sb->sgetc();
401 }
402 else
403 {
404 __str += __traits_type::to_char_type(__c);
405 ++__extracted;
406 __c = __sb->snextc();
407 }
408 }
409
410 if (__traits_type::eq_int_type(__c, __eof))
411 __err |= ios_base::eofbit;
412 else if (__traits_type::eq_int_type(__c, __idelim))
413 {
414 ++__extracted;
415 __sb->sbumpc();
416 }
417 else
418 __err |= ios_base::failbit;
419 }
420 __catch(__cxxabiv1::__forced_unwind&)
421 {
422 __in._M_setstate(ios_base::badbit);
423 __throw_exception_again;
424 }
425 __catch(...)
426 {
427 // _GLIBCXX_RESOLVE_LIB_DEFECTS
428 // 91. Description of operator>> and getline() for string<>
429 // might cause endless loop
430 __in._M_setstate(ios_base::badbit);
431 }
432 }
433 if (!__extracted)
434 __err |= ios_base::failbit;
435 if (__err)
436 __in.setstate(__err);
437 return __in;
438 }
439
440 #ifdef _GLIBCXX_USE_WCHAR_T
441 template<>
442 basic_istream<wchar_t>&
443 basic_istream<wchar_t>::
444 getline(char_type* __s, streamsize __n, char_type __delim)
445 {
446 _M_gcount = 0;
447 ios_base::iostate __err = ios_base::goodbit;
448 sentry __cerb(*this, true);
449 if (__cerb)
450 {
451 __try
452 {
453 const int_type __idelim = traits_type::to_int_type(__delim);
454 const int_type __eof = traits_type::eof();
455 __streambuf_type* __sb = this->rdbuf();
456 int_type __c = __sb->sgetc();
457
458 while (_M_gcount + 1 < __n
459 && !traits_type::eq_int_type(__c, __eof)
460 && !traits_type::eq_int_type(__c, __idelim))
461 {
462 streamsize __size = std::min(streamsize(__sb->egptr()
463 - __sb->gptr()),
464 streamsize(__n - _M_gcount
465 - 1));
466 if (__size > 1)
467 {
468 const char_type* __p = traits_type::find(__sb->gptr(),
469 __size,
470 __delim);
471 if (__p)
472 __size = __p - __sb->gptr();
473 traits_type::copy(__s, __sb->gptr(), __size);
474 __s += __size;
475 __sb->__safe_gbump(__size);
476 _M_gcount += __size;
477 __c = __sb->sgetc();
478 }
479 else
480 {
481 *__s++ = traits_type::to_char_type(__c);
482 ++_M_gcount;
483 __c = __sb->snextc();
484 }
485 }
486
487 if (traits_type::eq_int_type(__c, __eof))
488 __err |= ios_base::eofbit;
489 else if (traits_type::eq_int_type(__c, __idelim))
490 {
491 ++_M_gcount;
492 __sb->sbumpc();
493 }
494 else
495 __err |= ios_base::failbit;
496 }
497 __catch(__cxxabiv1::__forced_unwind&)
498 {
499 this->_M_setstate(ios_base::badbit);
500 __throw_exception_again;
501 }
502 __catch(...)
503 { this->_M_setstate(ios_base::badbit); }
504 }
505 // _GLIBCXX_RESOLVE_LIB_DEFECTS
506 // 243. get and getline when sentry reports failure.
507 if (__n > 0)
508 *__s = char_type();
509 if (!_M_gcount)
510 __err |= ios_base::failbit;
511 if (__err)
512 this->setstate(__err);
513 return *this;
514 }
515
516 template<>
517 basic_istream<wchar_t>&
518 basic_istream<wchar_t>::
519 ignore(streamsize __n, int_type __delim)
520 {
521 if (traits_type::eq_int_type(__delim, traits_type::eof()))
522 return ignore(__n);
523
524 _M_gcount = 0;
525 sentry __cerb(*this, true);
526 if (__n > 0 && __cerb)
527 {
528 ios_base::iostate __err = ios_base::goodbit;
529 __try
530 {
531 const char_type __cdelim = traits_type::to_char_type(__delim);
532 const int_type __eof = traits_type::eof();
533 __streambuf_type* __sb = this->rdbuf();
534 int_type __c = __sb->sgetc();
535
536 bool __large_ignore = false;
537 while (true)
538 {
539 while (_M_gcount < __n
540 && !traits_type::eq_int_type(__c, __eof)
541 && !traits_type::eq_int_type(__c, __delim))
542 {
543 streamsize __size = std::min(streamsize(__sb->egptr()
544 - __sb->gptr()),
545 streamsize(__n - _M_gcount));
546 if (__size > 1)
547 {
548 const char_type* __p = traits_type::find(__sb->gptr(),
549 __size,
550 __cdelim);
551 if (__p)
552 __size = __p - __sb->gptr();
553 __sb->__safe_gbump(__size);
554 _M_gcount += __size;
555 __c = __sb->sgetc();
556 }
557 else
558 {
559 ++_M_gcount;
560 __c = __sb->snextc();
561 }
562 }
563 if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max
564 && !traits_type::eq_int_type(__c, __eof)
565 && !traits_type::eq_int_type(__c, __delim))
566 {
567 _M_gcount =
568 __gnu_cxx::__numeric_traits<streamsize>::__min;
569 __large_ignore = true;
570 }
571 else
572 break;
573 }
574
575 if (__large_ignore)
576 _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max;
577
578 if (traits_type::eq_int_type(__c, __eof))
579 __err |= ios_base::eofbit;
580 else if (traits_type::eq_int_type(__c, __delim))
581 {
582 if (_M_gcount
583 < __gnu_cxx::__numeric_traits<streamsize>::__max)
584 ++_M_gcount;
585 __sb->sbumpc();
586 }
587 }
588 __catch(__cxxabiv1::__forced_unwind&)
589 {
590 this->_M_setstate(ios_base::badbit);
591 __throw_exception_again;
592 }
593 __catch(...)
594 { this->_M_setstate(ios_base::badbit); }
595 if (__err)
596 this->setstate(__err);
597 }
598 return *this;
599 }
600
601 template<>
602 basic_istream<wchar_t>&
603 getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str,
604 wchar_t __delim)
605 {
606 typedef basic_istream<wchar_t> __istream_type;
607 typedef __istream_type::int_type __int_type;
608 typedef __istream_type::char_type __char_type;
609 typedef __istream_type::traits_type __traits_type;
610 typedef __istream_type::__streambuf_type __streambuf_type;
611 typedef basic_string<wchar_t> __string_type;
612 typedef __string_type::size_type __size_type;
613
614 __size_type __extracted = 0;
615 const __size_type __n = __str.max_size();
616 ios_base::iostate __err = ios_base::goodbit;
617 __istream_type::sentry __cerb(__in, true);
618 if (__cerb)
619 {
620 __try
621 {
622 __str.erase();
623 const __int_type __idelim = __traits_type::to_int_type(__delim);
624 const __int_type __eof = __traits_type::eof();
625 __streambuf_type* __sb = __in.rdbuf();
626 __int_type __c = __sb->sgetc();
627
628 while (__extracted < __n
629 && !__traits_type::eq_int_type(__c, __eof)
630 && !__traits_type::eq_int_type(__c, __idelim))
631 {
632 streamsize __size = std::min(streamsize(__sb->egptr()
633 - __sb->gptr()),
634 streamsize(__n - __extracted));
635 if (__size > 1)
636 {
637 const __char_type* __p = __traits_type::find(__sb->gptr(),
638 __size,
639 __delim);
640 if (__p)
641 __size = __p - __sb->gptr();
642 __str.append(__sb->gptr(), __size);
643 __sb->__safe_gbump(__size);
644 __extracted += __size;
645 __c = __sb->sgetc();
646 }
647 else
648 {
649 __str += __traits_type::to_char_type(__c);
650 ++__extracted;
651 __c = __sb->snextc();
652 }
653 }
654
655 if (__traits_type::eq_int_type(__c, __eof))
656 __err |= ios_base::eofbit;
657 else if (__traits_type::eq_int_type(__c, __idelim))
658 {
659 ++__extracted;
660 __sb->sbumpc();
661 }
662 else
663 __err |= ios_base::failbit;
664 }
665 __catch(__cxxabiv1::__forced_unwind&)
666 {
667 __in._M_setstate(ios_base::badbit);
668 __throw_exception_again;
669 }
670 __catch(...)
671 {
672 // _GLIBCXX_RESOLVE_LIB_DEFECTS
673 // 91. Description of operator>> and getline() for string<>
674 // might cause endless loop
675 __in._M_setstate(ios_base::badbit);
676 }
677 }
678 if (!__extracted)
679 __err |= ios_base::failbit;
680 if (__err)
681 __in.setstate(__err);
682 return __in;
683 }
684 #endif
685
686 _GLIBCXX_END_NAMESPACE_VERSION
687 } // namespace
Mirror of https://gcc.gnu.org/git/gcc.git