1 // istream classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
4 // Free Software Foundation, Inc.
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 2, or (at your option)
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.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
32 // ISO C++ 14882: 27.6.2 Output streams
35 #pragma GCC system_header
38 #include <ostream> // For flush()
42 template<typename _CharT, typename _Traits>
43 basic_istream<_CharT, _Traits>::sentry::
44 sentry(basic_istream<_CharT, _Traits>& __in, bool __noskipws)
50 if (!__noskipws && (__in.flags() & ios_base::skipws))
52 const __int_type __eof = traits_type::eof();
53 __streambuf_type* __sb = __in.rdbuf();
54 __int_type __c = __sb->sgetc();
56 if (__in._M_check_facet(__in._M_fctype))
57 while (!traits_type::eq_int_type(__c, __eof)
58 && __in._M_fctype->is(ctype_base::space,
59 traits_type::to_char_type(__c)))
62 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
63 //195. Should basic_istream::sentry's constructor ever set eofbit?
64 if (traits_type::eq_int_type(__c, __eof))
65 __in.setstate(ios_base::eofbit);
75 __in.setstate(ios_base::failbit);
79 template<typename _CharT, typename _Traits>
80 basic_istream<_CharT, _Traits>&
81 basic_istream<_CharT, _Traits>::
82 operator>>(__istream_type& (*__pf)(__istream_type&))
88 template<typename _CharT, typename _Traits>
89 basic_istream<_CharT, _Traits>&
90 basic_istream<_CharT, _Traits>::
91 operator>>(__ios_type& (*__pf)(__ios_type&))
97 template<typename _CharT, typename _Traits>
98 basic_istream<_CharT, _Traits>&
99 basic_istream<_CharT, _Traits>::
100 operator>>(ios_base& (*__pf)(ios_base&))
106 template<typename _CharT, typename _Traits>
107 basic_istream<_CharT, _Traits>&
108 basic_istream<_CharT, _Traits>::
109 operator>>(bool& __n)
111 sentry __cerb(*this, false);
116 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
117 if (_M_check_facet(_M_fnumget))
118 _M_fnumget->get(*this, 0, *this, __err, __n);
119 this->setstate(__err);
121 catch(exception& __fail)
123 // 27.6.1.2.1 Common requirements.
124 // Turn this on without causing an ios::failure to be thrown.
125 this->setstate(ios_base::badbit);
126 if ((this->exceptions() & ios_base::badbit) != 0)
127 __throw_exception_again;
133 template<typename _CharT, typename _Traits>
134 basic_istream<_CharT, _Traits>&
135 basic_istream<_CharT, _Traits>::
136 operator>>(short& __n)
138 sentry __cerb(*this, false);
143 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
145 if (_M_check_facet(_M_fnumget))
146 _M_fnumget->get(*this, 0, *this, __err, __l);
147 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
148 // 118. basic_istream uses nonexistent num_get member functions.
149 if (!(__err & ios_base::failbit)
150 && (numeric_limits<short>::min() <= __l
151 && __l <= numeric_limits<short>::max()))
154 __err |= ios_base::failbit;
156 this->setstate(__err);
158 catch(exception& __fail)
160 // 27.6.1.2.1 Common requirements.
161 // Turn this on without causing an ios::failure to be thrown.
162 this->setstate(ios_base::badbit);
163 if ((this->exceptions() & ios_base::badbit) != 0)
164 __throw_exception_again;
170 template<typename _CharT, typename _Traits>
171 basic_istream<_CharT, _Traits>&
172 basic_istream<_CharT, _Traits>::
173 operator>>(unsigned short& __n)
175 sentry __cerb(*this, false);
180 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
181 if (_M_check_facet(_M_fnumget))
182 _M_fnumget->get(*this, 0, *this, __err, __n);
183 this->setstate(__err);
185 catch(exception& __fail)
187 // 27.6.1.2.1 Common requirements.
188 // Turn this on without causing an ios::failure to be thrown.
189 this->setstate(ios_base::badbit);
190 if ((this->exceptions() & ios_base::badbit) != 0)
191 __throw_exception_again;
197 template<typename _CharT, typename _Traits>
198 basic_istream<_CharT, _Traits>&
199 basic_istream<_CharT, _Traits>::
202 sentry __cerb(*this, false);
207 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
209 if (_M_check_facet(_M_fnumget))
210 _M_fnumget->get(*this, 0, *this, __err, __l);
211 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
212 // 118. basic_istream uses nonexistent num_get member functions.
213 if (!(__err & ios_base::failbit)
214 && (numeric_limits<int>::min() <= __l
215 && __l <= numeric_limits<int>::max()))
218 __err |= ios_base::failbit;
220 this->setstate(__err);
222 catch(exception& __fail)
224 // 27.6.1.2.1 Common requirements.
225 // Turn this on without causing an ios::failure to be thrown.
226 this->setstate(ios_base::badbit);
227 if ((this->exceptions() & ios_base::badbit) != 0)
228 __throw_exception_again;
234 template<typename _CharT, typename _Traits>
235 basic_istream<_CharT, _Traits>&
236 basic_istream<_CharT, _Traits>::
237 operator>>(unsigned int& __n)
239 sentry __cerb(*this, false);
244 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
245 if (_M_check_facet(_M_fnumget))
246 _M_fnumget->get(*this, 0, *this, __err, __n);
247 this->setstate(__err);
249 catch(exception& __fail)
251 // 27.6.1.2.1 Common requirements.
252 // Turn this on without causing an ios::failure to be thrown.
253 this->setstate(ios_base::badbit);
254 if ((this->exceptions() & ios_base::badbit) != 0)
255 __throw_exception_again;
261 template<typename _CharT, typename _Traits>
262 basic_istream<_CharT, _Traits>&
263 basic_istream<_CharT, _Traits>::
264 operator>>(long& __n)
266 sentry __cerb(*this, false);
271 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
272 if (_M_check_facet(_M_fnumget))
273 _M_fnumget->get(*this, 0, *this, __err, __n);
274 this->setstate(__err);
276 catch(exception& __fail)
278 // 27.6.1.2.1 Common requirements.
279 // Turn this on without causing an ios::failure to be thrown.
280 this->setstate(ios_base::badbit);
281 if ((this->exceptions() & ios_base::badbit) != 0)
282 __throw_exception_again;
288 template<typename _CharT, typename _Traits>
289 basic_istream<_CharT, _Traits>&
290 basic_istream<_CharT, _Traits>::
291 operator>>(unsigned long& __n)
293 sentry __cerb(*this, false);
298 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
299 if (_M_check_facet(_M_fnumget))
300 _M_fnumget->get(*this, 0, *this, __err, __n);
301 this->setstate(__err);
303 catch(exception& __fail)
305 // 27.6.1.2.1 Common requirements.
306 // Turn this on without causing an ios::failure to be thrown.
307 this->setstate(ios_base::badbit);
308 if ((this->exceptions() & ios_base::badbit) != 0)
309 __throw_exception_again;
315 #ifdef _GLIBCPP_USE_LONG_LONG
316 template<typename _CharT, typename _Traits>
317 basic_istream<_CharT, _Traits>&
318 basic_istream<_CharT, _Traits>::
319 operator>>(long long& __n)
321 sentry __cerb(*this, false);
326 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
327 if (_M_check_facet(_M_fnumget))
328 _M_fnumget->get(*this, 0, *this, __err, __n);
329 this->setstate(__err);
331 catch(exception& __fail)
333 // 27.6.1.2.1 Common requirements.
334 // Turn this on without causing an ios::failure to be thrown.
335 this->setstate(ios_base::badbit);
336 if ((this->exceptions() & ios_base::badbit) != 0)
337 __throw_exception_again;
343 template<typename _CharT, typename _Traits>
344 basic_istream<_CharT, _Traits>&
345 basic_istream<_CharT, _Traits>::
346 operator>>(unsigned long long& __n)
348 sentry __cerb(*this, false);
353 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
354 if (_M_check_facet(_M_fnumget))
355 _M_fnumget->get(*this, 0, *this, __err, __n);
356 this->setstate(__err);
358 catch(exception& __fail)
360 // 27.6.1.2.1 Common requirements.
361 // Turn this on without causing an ios::failure to be thrown.
362 this->setstate(ios_base::badbit);
363 if ((this->exceptions() & ios_base::badbit) != 0)
364 __throw_exception_again;
371 template<typename _CharT, typename _Traits>
372 basic_istream<_CharT, _Traits>&
373 basic_istream<_CharT, _Traits>::
374 operator>>(float& __n)
376 sentry __cerb(*this, false);
381 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
382 if (_M_check_facet(_M_fnumget))
383 _M_fnumget->get(*this, 0, *this, __err, __n);
384 this->setstate(__err);
386 catch(exception& __fail)
388 // 27.6.1.2.1 Common requirements.
389 // Turn this on without causing an ios::failure to be thrown.
390 this->setstate(ios_base::badbit);
391 if ((this->exceptions() & ios_base::badbit) != 0)
392 __throw_exception_again;
398 template<typename _CharT, typename _Traits>
399 basic_istream<_CharT, _Traits>&
400 basic_istream<_CharT, _Traits>::
401 operator>>(double& __n)
403 sentry __cerb(*this, false);
408 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
409 if (_M_check_facet(_M_fnumget))
410 _M_fnumget->get(*this, 0, *this, __err, __n);
411 this->setstate(__err);
413 catch(exception& __fail)
415 // 27.6.1.2.1 Common requirements.
416 // Turn this on without causing an ios::failure to be thrown.
417 this->setstate(ios_base::badbit);
418 if ((this->exceptions() & ios_base::badbit) != 0)
419 __throw_exception_again;
425 template<typename _CharT, typename _Traits>
426 basic_istream<_CharT, _Traits>&
427 basic_istream<_CharT, _Traits>::
428 operator>>(long double& __n)
430 sentry __cerb(*this, false);
435 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
436 if (_M_check_facet(_M_fnumget))
437 _M_fnumget->get(*this, 0, *this, __err, __n);
438 this->setstate(__err);
440 catch(exception& __fail)
442 // 27.6.1.2.1 Common requirements.
443 // Turn this on without causing an ios::failure to be thrown.
444 this->setstate(ios_base::badbit);
445 if ((this->exceptions() & ios_base::badbit) != 0)
446 __throw_exception_again;
452 template<typename _CharT, typename _Traits>
453 basic_istream<_CharT, _Traits>&
454 basic_istream<_CharT, _Traits>::
455 operator>>(void*& __n)
457 sentry __cerb(*this, false);
462 ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
463 if (_M_check_facet(_M_fnumget))
464 _M_fnumget->get(*this, 0, *this, __err, __n);
465 this->setstate(__err);
467 catch(exception& __fail)
469 // 27.6.1.2.1 Common requirements.
470 // Turn this on without causing an ios::failure to be thrown.
471 this->setstate(ios_base::badbit);
472 if ((this->exceptions() & ios_base::badbit) != 0)
473 __throw_exception_again;
479 template<typename _CharT, typename _Traits>
480 basic_istream<_CharT, _Traits>&
481 basic_istream<_CharT, _Traits>::
482 operator>>(__streambuf_type* __sbout)
484 sentry __cerb(*this, false);
489 streamsize __xtrct = 0;
492 __streambuf_type* __sbin = this->rdbuf();
493 __xtrct = __copy_streambufs(*this, __sbin, __sbout);
495 if (!__sbout || !__xtrct)
496 this->setstate(ios_base::failbit);
498 catch(exception& __fail)
500 // 27.6.2.5.1 Common requirements.
501 // Turn this on without causing an ios::failure to be thrown.
502 this->setstate(ios_base::badbit);
503 if ((this->exceptions() & ios_base::badbit) != 0)
504 __throw_exception_again;
510 template<typename _CharT, typename _Traits>
511 typename basic_istream<_CharT, _Traits>::int_type
512 basic_istream<_CharT, _Traits>::
515 const int_type __eof = traits_type::eof();
516 int_type __c = __eof;
518 sentry __cerb(*this, true);
523 __c = this->rdbuf()->sbumpc();
524 // 27.6.1.1 paragraph 3
525 if (!traits_type::eq_int_type(__c, __eof))
528 this->setstate(ios_base::eofbit | ios_base::failbit);
530 catch(exception& __fail)
532 // 27.6.1.3 paragraph 1
533 // Turn this on without causing an ios::failure to be thrown.
534 this->setstate(ios_base::badbit);
535 if ((this->exceptions() & ios_base::badbit) != 0)
536 __throw_exception_again;
542 template<typename _CharT, typename _Traits>
543 basic_istream<_CharT, _Traits>&
544 basic_istream<_CharT, _Traits>::
548 sentry __cerb(*this, true);
553 const int_type __eof = traits_type::eof();
554 int_type __bufval = this->rdbuf()->sbumpc();
555 // 27.6.1.1 paragraph 3
556 if (!traits_type::eq_int_type(__bufval, __eof))
559 __c = traits_type::to_char_type(__bufval);
562 this->setstate(ios_base::eofbit | ios_base::failbit);
564 catch(exception& __fail)
566 // 27.6.1.3 paragraph 1
567 // Turn this on without causing an ios::failure to be thrown.
568 this->setstate(ios_base::badbit);
569 if ((this->exceptions() & ios_base::badbit) != 0)
570 __throw_exception_again;
576 template<typename _CharT, typename _Traits>
577 basic_istream<_CharT, _Traits>&
578 basic_istream<_CharT, _Traits>::
579 get(char_type* __s, streamsize __n, char_type __delim)
582 sentry __cerb(*this, true);
587 const int_type __idelim = traits_type::to_int_type(__delim);
588 const int_type __eof = traits_type::eof();
589 __streambuf_type* __sb = this->rdbuf();
590 int_type __c = __sb->sgetc();
592 while (_M_gcount + 1 < __n
593 && !traits_type::eq_int_type(__c, __eof)
594 && !traits_type::eq_int_type(__c, __idelim))
596 *__s++ = traits_type::to_char_type(__c);
597 __c = __sb->snextc();
600 if (traits_type::eq_int_type(__c, __eof))
601 this->setstate(ios_base::eofbit);
603 catch(exception& __fail)
605 // 27.6.1.3 paragraph 1
606 // Turn this on without causing an ios::failure to be thrown.
607 this->setstate(ios_base::badbit);
608 if ((this->exceptions() & ios_base::badbit) != 0)
609 __throw_exception_again;
614 this->setstate(ios_base::failbit);
618 template<typename _CharT, typename _Traits>
619 basic_istream<_CharT, _Traits>&
620 basic_istream<_CharT, _Traits>::
621 get(__streambuf_type& __sb, char_type __delim)
624 sentry __cerb(*this, true);
629 const int_type __idelim = traits_type::to_int_type(__delim);
630 const int_type __eof = traits_type::eof();
631 __streambuf_type* __this_sb = this->rdbuf();
632 int_type __c = __this_sb->sgetc();
633 char_type __c2 = traits_type::to_char_type(__c);
635 while (!traits_type::eq_int_type(__c, __eof)
636 && !traits_type::eq_int_type(__c, __idelim)
637 && !traits_type::eq_int_type(__sb.sputc(__c2), __eof))
640 __c = __this_sb->snextc();
641 __c2 = traits_type::to_char_type(__c);
643 if (traits_type::eq_int_type(__c, __eof))
644 this->setstate(ios_base::eofbit);
646 catch(exception& __fail)
648 // 27.6.1.3 paragraph 1
649 // Turn this on without causing an ios::failure to be thrown.
650 this->setstate(ios_base::badbit);
651 if ((this->exceptions() & ios_base::badbit) != 0)
652 __throw_exception_again;
656 this->setstate(ios_base::failbit);
660 template<typename _CharT, typename _Traits>
661 basic_istream<_CharT, _Traits>&
662 basic_istream<_CharT, _Traits>::
663 getline(char_type* __s, streamsize __n, char_type __delim)
666 sentry __cerb(*this, true);
671 const int_type __idelim = traits_type::to_int_type(__delim);
672 const int_type __eof = traits_type::eof();
673 __streambuf_type* __sb = this->rdbuf();
674 int_type __c = __sb->sgetc();
676 while (_M_gcount + 1 < __n
677 && !traits_type::eq_int_type(__c, __eof)
678 && !traits_type::eq_int_type(__c, __idelim))
680 *__s++ = traits_type::to_char_type(__c);
681 __c = __sb->snextc();
684 if (traits_type::eq_int_type(__c, __eof))
685 this->setstate(ios_base::eofbit);
688 if (traits_type::eq_int_type(__c, __idelim))
694 this->setstate(ios_base::failbit);
697 catch(exception& __fail)
699 // 27.6.1.3 paragraph 1
700 // Turn this on without causing an ios::failure to be thrown.
701 this->setstate(ios_base::badbit);
702 if ((this->exceptions() & ios_base::badbit) != 0)
703 __throw_exception_again;
708 this->setstate(ios_base::failbit);
712 template<typename _CharT, typename _Traits>
713 basic_istream<_CharT, _Traits>&
714 basic_istream<_CharT, _Traits>::
715 ignore(streamsize __n, int_type __delim)
718 sentry __cerb(*this, true);
719 if (__cerb && __n > 0)
723 const int_type __eof = traits_type::eof();
724 __streambuf_type* __sb = this->rdbuf();
725 int_type __c = __sb->sgetc();
727 __n = min(__n, numeric_limits<streamsize>::max());
728 while (_M_gcount < __n
729 && !traits_type::eq_int_type(__c, __eof)
730 && !traits_type::eq_int_type(__c, __delim))
732 __c = __sb->snextc();
735 if (traits_type::eq_int_type(__c, __eof))
736 this->setstate(ios_base::eofbit);
737 else if (traits_type::eq_int_type(__c, __delim))
743 catch(exception& __fail)
745 // 27.6.1.3 paragraph 1
746 // Turn this on without causing an ios::failure to be thrown.
747 this->setstate(ios_base::badbit);
748 if ((this->exceptions() & ios_base::badbit) != 0)
749 __throw_exception_again;
755 template<typename _CharT, typename _Traits>
756 typename basic_istream<_CharT, _Traits>::int_type
757 basic_istream<_CharT, _Traits>::
760 int_type __c = traits_type::eof();
762 sentry __cerb(*this, true);
766 { __c = this->rdbuf()->sgetc(); }
767 catch(exception& __fail)
769 // 27.6.1.3 paragraph 1
770 // Turn this on without causing an ios::failure to be thrown.
771 this->setstate(ios_base::badbit);
772 if ((this->exceptions() & ios_base::badbit) != 0)
773 __throw_exception_again;
779 template<typename _CharT, typename _Traits>
780 basic_istream<_CharT, _Traits>&
781 basic_istream<_CharT, _Traits>::
782 read(char_type* __s, streamsize __n)
785 sentry __cerb(*this, true);
790 _M_gcount = this->rdbuf()->sgetn(__s, __n);
791 if (_M_gcount != __n)
792 this->setstate(ios_base::eofbit | ios_base::failbit);
794 catch(exception& __fail)
796 // 27.6.1.3 paragraph 1
797 // Turn this on without causing an ios::failure to be thrown.
798 this->setstate(ios_base::badbit);
799 if ((this->exceptions() & ios_base::badbit) != 0)
800 __throw_exception_again;
804 this->setstate(ios_base::failbit);
808 template<typename _CharT, typename _Traits>
810 basic_istream<_CharT, _Traits>::
811 readsome(char_type* __s, streamsize __n)
814 sentry __cerb(*this, true);
819 streamsize __num = this->rdbuf()->in_avail();
822 __num = min(__num, __n);
824 _M_gcount = this->rdbuf()->sgetn(__s, __num);
827 this->setstate(ios_base::eofbit);
829 catch(exception& __fail)
831 // 27.6.1.3 paragraph 1
832 // Turn this on without causing an ios::failure to be thrown.
833 this->setstate(ios_base::badbit);
834 if ((this->exceptions() & ios_base::badbit) != 0)
835 __throw_exception_again;
839 this->setstate(ios_base::failbit);
843 template<typename _CharT, typename _Traits>
844 basic_istream<_CharT, _Traits>&
845 basic_istream<_CharT, _Traits>::
846 putback(char_type __c)
848 sentry __cerb(*this, true);
853 const int_type __eof = traits_type::eof();
854 __streambuf_type* __sb = this->rdbuf();
856 || traits_type::eq_int_type(__sb->sputbackc(__c), __eof))
857 this->setstate(ios_base::badbit);
859 catch(exception& __fail)
861 // 27.6.1.3 paragraph 1
862 // Turn this on without causing an ios::failure to be thrown.
863 this->setstate(ios_base::badbit);
864 if ((this->exceptions() & ios_base::badbit) != 0)
865 __throw_exception_again;
869 this->setstate(ios_base::failbit);
873 template<typename _CharT, typename _Traits>
874 basic_istream<_CharT, _Traits>&
875 basic_istream<_CharT, _Traits>::
879 sentry __cerb(*this, true);
884 const int_type __eof = traits_type::eof();
885 __streambuf_type* __sb = this->rdbuf();
887 || traits_type::eq_int_type(__sb->sungetc(), __eof))
888 this->setstate(ios_base::badbit);
890 catch(exception& __fail)
892 // 27.6.1.3 paragraph 1
893 // Turn this on without causing an ios::failure to be thrown.
894 this->setstate(ios_base::badbit);
895 if ((this->exceptions() & ios_base::badbit) != 0)
896 __throw_exception_again;
900 this->setstate(ios_base::failbit);
904 template<typename _CharT, typename _Traits>
906 basic_istream<_CharT, _Traits>::
911 sentry __cerb(*this, true);
916 __streambuf_type* __sb = this->rdbuf();
919 if (__sb->pubsync() == -1)
920 this->setstate(ios_base::badbit);
925 catch(exception& __fail)
927 // 27.6.1.3 paragraph 1
928 // Turn this on without causing an ios::failure to be thrown.
929 this->setstate(ios_base::badbit);
930 if ((this->exceptions() & ios_base::badbit) != 0)
931 __throw_exception_again;
937 template<typename _CharT, typename _Traits>
938 typename basic_istream<_CharT, _Traits>::pos_type
939 basic_istream<_CharT, _Traits>::
942 pos_type __ret = pos_type(-1);
944 sentry __cerb(*this, true);
949 __ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
951 catch(exception& __fail)
953 // 27.6.1.3 paragraph 1
954 // Turn this on without causing an ios::failure to be thrown.
955 this->setstate(ios_base::badbit);
956 if ((this->exceptions() & ios_base::badbit) != 0)
957 __throw_exception_again;
964 template<typename _CharT, typename _Traits>
965 basic_istream<_CharT, _Traits>&
966 basic_istream<_CharT, _Traits>::
967 seekg(pos_type __pos)
970 sentry __cerb(*this, true);
975 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
976 // 136. seekp, seekg setting wrong streams?
977 pos_type __err = this->rdbuf()->pubseekpos(__pos, ios_base::in);
979 // 129. Need error indication from seekp() and seekg()
980 if (__err == pos_type(off_type(-1)))
981 this->setstate(ios_base::failbit);
984 catch(exception& __fail)
986 // 27.6.1.3 paragraph 1
987 // Turn this on without causing an ios::failure to be thrown.
988 this->setstate(ios_base::badbit);
989 if ((this->exceptions() & ios_base::badbit) != 0)
990 __throw_exception_again;
996 template<typename _CharT, typename _Traits>
997 basic_istream<_CharT, _Traits>&
998 basic_istream<_CharT, _Traits>::
999 seekg(off_type __off, ios_base::seekdir __dir)
1002 sentry __cerb(*this, true);
1007 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
1008 // 136. seekp, seekg setting wrong streams?
1009 pos_type __err = this->rdbuf()->pubseekoff(__off, __dir,
1012 // 129. Need error indication from seekp() and seekg()
1013 if (__err == pos_type(off_type(-1)))
1014 this->setstate(ios_base::failbit);
1017 catch(exception& __fail)
1019 // 27.6.1.3 paragraph 1
1020 // Turn this on without causing an ios::failure to be thrown.
1021 this->setstate(ios_base::badbit);
1022 if ((this->exceptions() & ios_base::badbit) != 0)
1023 __throw_exception_again;
1029 // 27.6.1.2.3 Character extraction templates
1030 template<typename _CharT, typename _Traits>
1031 basic_istream<_CharT, _Traits>&
1032 operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
1034 typedef basic_istream<_CharT, _Traits> __istream_type;
1035 typename __istream_type::sentry __cerb(__in, false);
1040 catch(exception& __fail)
1042 // 27.6.1.2.1 Common requirements.
1043 // Turn this on without causing an ios::failure to be thrown.
1044 __in.setstate(ios_base::badbit);
1045 if ((__in.exceptions() & ios_base::badbit) != 0)
1046 __throw_exception_again;
1050 __in.setstate(ios_base::failbit);
1054 template<typename _CharT, typename _Traits>
1055 basic_istream<_CharT, _Traits>&
1056 operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
1058 typedef basic_istream<_CharT, _Traits> __istream_type;
1059 typedef typename __istream_type::__streambuf_type __streambuf_type;
1060 typedef typename _Traits::int_type int_type;
1061 typedef _CharT char_type;
1062 typedef ctype<_CharT> __ctype_type;
1063 streamsize __extracted = 0;
1065 typename __istream_type::sentry __cerb(__in, false);
1070 // Figure out how many characters to extract.
1071 streamsize __num = __in.width();
1073 __num = numeric_limits<streamsize>::max();
1075 const __ctype_type& __ctype = use_facet<__ctype_type>(__in.getloc());
1076 const int_type __eof = _Traits::eof();
1077 __streambuf_type* __sb = __in.rdbuf();
1078 int_type __c = __sb->sgetc();
1080 while (__extracted < __num - 1
1081 && __c != __eof && !__ctype.is(ctype_base::space, __c))
1085 __c = __sb->snextc();
1088 __in.setstate(ios_base::eofbit);
1090 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
1091 //68. Extractors for char* should store null at end
1096 catch(exception& __fail)
1098 // 27.6.1.2.1 Common requirements.
1099 // Turn this on without causing an ios::failure to be thrown.
1100 __in.setstate(ios_base::badbit);
1101 if ((__in.exceptions() & ios_base::badbit) != 0)
1102 __throw_exception_again;
1106 __in.setstate(ios_base::failbit);
1110 // 27.6.1.4 Standard basic_istream manipulators
1111 template<typename _CharT, typename _Traits>
1112 basic_istream<_CharT,_Traits>&
1113 ws(basic_istream<_CharT,_Traits>& __in)
1115 typedef basic_istream<_CharT, _Traits> __istream_type;
1116 typedef typename __istream_type::__streambuf_type __streambuf_type;
1117 typedef typename __istream_type::__ctype_type __ctype_type;
1118 typedef typename __istream_type::int_type __int_type;
1120 const __ctype_type& __ctype = use_facet<__ctype_type>(__in.getloc());
1121 const __int_type __eof = _Traits::eof();
1122 __streambuf_type* __sb = __in.rdbuf();
1123 __int_type __c = __sb->sgetc();
1125 while (__c != __eof && __ctype.is(ctype_base::space, __c))
1126 __c = __sb->snextc();
1128 __in.setstate(ios_base::eofbit);
1133 // 21.3.7.9 basic_string::getline and operators
1134 template<typename _CharT, typename _Traits, typename _Alloc>
1135 basic_istream<_CharT, _Traits>&
1136 operator>>(basic_istream<_CharT, _Traits>& __in,
1137 basic_string<_CharT, _Traits, _Alloc>& __str)
1139 typedef basic_istream<_CharT, _Traits> __istream_type;
1140 typedef typename __istream_type::int_type __int_type;
1141 typedef typename __istream_type::__streambuf_type __streambuf_type;
1142 typedef typename __istream_type::__ctype_type __ctype_type;
1143 typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
1144 typedef typename __string_type::size_type __size_type;
1145 __size_type __extracted = 0;
1147 typename __istream_type::sentry __cerb(__in, false);
1151 streamsize __w = __in.width();
1153 __n = __w > 0 ? static_cast<__size_type>(__w) : __str.max_size();
1155 const __ctype_type& __ctype = use_facet<__ctype_type>(__in.getloc());
1156 const __int_type __eof = _Traits::eof();
1157 __streambuf_type* __sb = __in.rdbuf();
1158 __int_type __c = __sb->sgetc();
1160 while (__extracted < __n
1161 && __c != __eof && !__ctype.is(ctype_base::space, __c))
1163 __str += _Traits::to_char_type(__c);
1165 __c = __sb->snextc();
1168 __in.setstate(ios_base::eofbit);
1171 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
1172 //211. operator>>(istream&, string&) doesn't set failbit
1174 __in.setstate (ios_base::failbit);
1179 template<typename _CharT, typename _Traits, typename _Alloc>
1180 basic_istream<_CharT, _Traits>&
1181 getline(basic_istream<_CharT, _Traits>& __in,
1182 basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
1184 typedef basic_istream<_CharT, _Traits> __istream_type;
1185 typedef typename __istream_type::int_type __int_type;
1186 typedef typename __istream_type::__streambuf_type __streambuf_type;
1187 typedef typename __istream_type::__ctype_type __ctype_type;
1188 typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
1189 typedef typename __string_type::size_type __size_type;
1191 __size_type __extracted = 0;
1192 bool __testdelim = false;
1193 typename __istream_type::sentry __cerb(__in, true);
1197 __size_type __n = __str.max_size();
1199 __int_type __idelim = _Traits::to_int_type(__delim);
1200 __streambuf_type* __sb = __in.rdbuf();
1201 __int_type __c = __sb->sbumpc();
1202 const __int_type __eof = _Traits::eof();
1203 __testdelim = _Traits::eq_int_type(__c, __idelim);
1205 while (__extracted <= __n
1206 && !_Traits::eq_int_type(__c, __eof)
1209 __str += _Traits::to_char_type(__c);
1211 __c = __sb->sbumpc();
1212 __testdelim = _Traits::eq_int_type(__c, __idelim);
1214 if (_Traits::eq_int_type(__c, __eof))
1215 __in.setstate(ios_base::eofbit);
1217 if (!__extracted && !__testdelim)
1218 __in.setstate(ios_base::failbit);
1222 template<class _CharT, class _Traits, class _Alloc>
1223 inline basic_istream<_CharT,_Traits>&
1224 getline(basic_istream<_CharT, _Traits>& __in,
1225 basic_string<_CharT,_Traits,_Alloc>& __str)
1226 { return getline(__in, __str, __in.widen('\n')); }
1228 // Inhibit implicit instantiations for required instantiations,
1229 // which are defined via explicit instantiations elsewhere.
1230 // NB: This syntax is a GNU extension.
1231 extern template class basic_istream<char>;
1232 extern template istream& ws(istream&);
1233 extern template istream& operator>>(istream&, char&);
1234 extern template istream& operator>>(istream&, char*);
1235 extern template istream& operator>>(istream&, unsigned char&);
1236 extern template istream& operator>>(istream&, signed char&);
1237 extern template istream& operator>>(istream&, unsigned char*);
1238 extern template istream& operator>>(istream&, signed char*);
1240 #ifdef _GLIBCPP_USE_WCHAR_T
1241 extern template class basic_istream<wchar_t>;
1242 extern template wistream& ws(wistream&);
1243 extern template wistream& operator>>(wistream&, wchar_t&);
1244 extern template wistream& operator>>(wistream&, wchar_t*);