1 // Input streams -*- C++ -*-
3 // Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
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 3, 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 // 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.
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/>.
27 // ISO C++ 14882: 27.6.1 Input streams
32 namespace std _GLIBCXX_VISIBILITY(default)
34 _GLIBCXX_BEGIN_NAMESPACE_VERSION
39 getline(char_type* __s, streamsize __n, char_type __delim)
42 ios_base::iostate __err = ios_base::goodbit;
43 sentry __cerb(*this, true);
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();
53 while (_M_gcount + 1 < __n
54 && !traits_type::eq_int_type(__c, __eof)
55 && !traits_type::eq_int_type(__c, __idelim))
57 streamsize __size = std::min(streamsize(__sb->egptr()
59 streamsize(__n - _M_gcount
63 const char_type* __p = traits_type::find(__sb->gptr(),
67 __size = __p - __sb->gptr();
68 traits_type::copy(__s, __sb->gptr(), __size);
70 __sb->__safe_gbump(__size);
76 *__s++ = traits_type::to_char_type(__c);
82 if (traits_type::eq_int_type(__c, __eof))
83 __err |= ios_base::eofbit;
84 else if (traits_type::eq_int_type(__c, __idelim))
90 __err |= ios_base::failbit;
92 __catch(__cxxabiv1::__forced_unwind&)
94 this->_M_setstate(ios_base::badbit);
95 __throw_exception_again;
98 { this->_M_setstate(ios_base::badbit); }
100 // _GLIBCXX_RESOLVE_LIB_DEFECTS
101 // 243. get and getline when sentry reports failure.
105 __err |= ios_base::failbit;
107 this->setstate(__err);
113 basic_istream<char>::
114 ignore(streamsize __n, int_type __delim)
116 if (traits_type::eq_int_type(__delim, traits_type::eof()))
120 sentry __cerb(*this, true);
121 if (__n > 0 && __cerb)
123 ios_base::iostate __err = ios_base::goodbit;
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();
131 bool __large_ignore = false;
134 while (_M_gcount < __n
135 && !traits_type::eq_int_type(__c, __eof)
136 && !traits_type::eq_int_type(__c, __delim))
138 streamsize __size = std::min(streamsize(__sb->egptr()
140 streamsize(__n - _M_gcount));
143 const char_type* __p = traits_type::find(__sb->gptr(),
147 __size = __p - __sb->gptr();
148 __sb->__safe_gbump(__size);
155 __c = __sb->snextc();
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))
163 __gnu_cxx::__numeric_traits<streamsize>::__min;
164 __large_ignore = true;
171 _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max;
173 if (traits_type::eq_int_type(__c, __eof))
174 __err |= ios_base::eofbit;
175 else if (traits_type::eq_int_type(__c, __delim))
178 < __gnu_cxx::__numeric_traits<streamsize>::__max)
183 __catch(__cxxabiv1::__forced_unwind&)
185 this->_M_setstate(ios_base::badbit);
186 __throw_exception_again;
189 { this->_M_setstate(ios_base::badbit); }
191 this->setstate(__err);
198 operator>>(basic_istream<char>& __in, char* __s)
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;
207 streamsize __extracted = 0;
208 ios_base::iostate __err = ios_base::goodbit;
209 __istream_type::sentry __cerb(__in, false);
214 // Figure out how many characters to extract.
215 streamsize __num = __in.width();
217 __num = __gnu_cxx::__numeric_traits<streamsize>::__max;
219 const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
221 const __int_type __eof = __traits_type::eof();
222 __streambuf_type* __sb = __in.rdbuf();
223 __int_type __c = __sb->sgetc();
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)))
230 streamsize __size = std::min(streamsize(__sb->egptr()
232 streamsize(__num - __extracted
236 __size = (__ct.scan_is(ctype_base::space,
238 __sb->gptr() + __size)
240 __traits_type::copy(__s, __sb->gptr(), __size);
242 __sb->__safe_gbump(__size);
243 __extracted += __size;
248 *__s++ = __traits_type::to_char_type(__c);
250 __c = __sb->snextc();
254 if (__traits_type::eq_int_type(__c, __eof))
255 __err |= ios_base::eofbit;
257 // _GLIBCXX_RESOLVE_LIB_DEFECTS
258 // 68. Extractors for char* should store null at end
259 *__s = __char_type();
262 __catch(__cxxabiv1::__forced_unwind&)
264 __in._M_setstate(ios_base::badbit);
265 __throw_exception_again;
268 { __in._M_setstate(ios_base::badbit); }
271 __err |= ios_base::failbit;
273 __in.setstate(__err);
279 operator>>(basic_istream<char>& __in, basic_string<char>& __str)
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;
289 __size_type __extracted = 0;
290 ios_base::iostate __err = ios_base::goodbit;
291 __istream_type::sentry __cerb(__in, false);
297 const streamsize __w = __in.width();
298 const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
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();
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)))
310 streamsize __size = std::min(streamsize(__sb->egptr()
312 streamsize(__n - __extracted));
315 __size = (__ct.scan_is(ctype_base::space,
317 __sb->gptr() + __size)
319 __str.append(__sb->gptr(), __size);
320 __sb->__safe_gbump(__size);
321 __extracted += __size;
326 __str += __traits_type::to_char_type(__c);
328 __c = __sb->snextc();
332 if (__traits_type::eq_int_type(__c, __eof))
333 __err |= ios_base::eofbit;
336 __catch(__cxxabiv1::__forced_unwind&)
338 __in._M_setstate(ios_base::badbit);
339 __throw_exception_again;
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);
350 __err |= ios_base::failbit;
352 __in.setstate(__err);
358 getline(basic_istream<char>& __in, basic_string<char>& __str,
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;
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);
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();
383 while (__extracted < __n
384 && !__traits_type::eq_int_type(__c, __eof)
385 && !__traits_type::eq_int_type(__c, __idelim))
387 streamsize __size = std::min(streamsize(__sb->egptr()
389 streamsize(__n - __extracted));
392 const __char_type* __p = __traits_type::find(__sb->gptr(),
396 __size = __p - __sb->gptr();
397 __str.append(__sb->gptr(), __size);
398 __sb->__safe_gbump(__size);
399 __extracted += __size;
404 __str += __traits_type::to_char_type(__c);
406 __c = __sb->snextc();
410 if (__traits_type::eq_int_type(__c, __eof))
411 __err |= ios_base::eofbit;
412 else if (__traits_type::eq_int_type(__c, __idelim))
418 __err |= ios_base::failbit;
420 __catch(__cxxabiv1::__forced_unwind&)
422 __in._M_setstate(ios_base::badbit);
423 __throw_exception_again;
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);
434 __err |= ios_base::failbit;
436 __in.setstate(__err);
440 #ifdef _GLIBCXX_USE_WCHAR_T
442 basic_istream<wchar_t>&
443 basic_istream<wchar_t>::
444 getline(char_type* __s, streamsize __n, char_type __delim)
447 ios_base::iostate __err = ios_base::goodbit;
448 sentry __cerb(*this, true);
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();
458 while (_M_gcount + 1 < __n
459 && !traits_type::eq_int_type(__c, __eof)
460 && !traits_type::eq_int_type(__c, __idelim))
462 streamsize __size = std::min(streamsize(__sb->egptr()
464 streamsize(__n - _M_gcount
468 const char_type* __p = traits_type::find(__sb->gptr(),
472 __size = __p - __sb->gptr();
473 traits_type::copy(__s, __sb->gptr(), __size);
475 __sb->__safe_gbump(__size);
481 *__s++ = traits_type::to_char_type(__c);
483 __c = __sb->snextc();
487 if (traits_type::eq_int_type(__c, __eof))
488 __err |= ios_base::eofbit;
489 else if (traits_type::eq_int_type(__c, __idelim))
495 __err |= ios_base::failbit;
497 __catch(__cxxabiv1::__forced_unwind&)
499 this->_M_setstate(ios_base::badbit);
500 __throw_exception_again;
503 { this->_M_setstate(ios_base::badbit); }
505 // _GLIBCXX_RESOLVE_LIB_DEFECTS
506 // 243. get and getline when sentry reports failure.
510 __err |= ios_base::failbit;
512 this->setstate(__err);
517 basic_istream<wchar_t>&
518 basic_istream<wchar_t>::
519 ignore(streamsize __n, int_type __delim)
521 if (traits_type::eq_int_type(__delim, traits_type::eof()))
525 sentry __cerb(*this, true);
526 if (__n > 0 && __cerb)
528 ios_base::iostate __err = ios_base::goodbit;
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();
536 bool __large_ignore = false;
539 while (_M_gcount < __n
540 && !traits_type::eq_int_type(__c, __eof)
541 && !traits_type::eq_int_type(__c, __delim))
543 streamsize __size = std::min(streamsize(__sb->egptr()
545 streamsize(__n - _M_gcount));
548 const char_type* __p = traits_type::find(__sb->gptr(),
552 __size = __p - __sb->gptr();
553 __sb->__safe_gbump(__size);
560 __c = __sb->snextc();
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))
568 __gnu_cxx::__numeric_traits<streamsize>::__min;
569 __large_ignore = true;
576 _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max;
578 if (traits_type::eq_int_type(__c, __eof))
579 __err |= ios_base::eofbit;
580 else if (traits_type::eq_int_type(__c, __delim))
583 < __gnu_cxx::__numeric_traits<streamsize>::__max)
588 __catch(__cxxabiv1::__forced_unwind&)
590 this->_M_setstate(ios_base::badbit);
591 __throw_exception_again;
594 { this->_M_setstate(ios_base::badbit); }
596 this->setstate(__err);
602 basic_istream<wchar_t>&
603 getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str,
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;
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);
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();
628 while (__extracted < __n
629 && !__traits_type::eq_int_type(__c, __eof)
630 && !__traits_type::eq_int_type(__c, __idelim))
632 streamsize __size = std::min(streamsize(__sb->egptr()
634 streamsize(__n - __extracted));
637 const __char_type* __p = __traits_type::find(__sb->gptr(),
641 __size = __p - __sb->gptr();
642 __str.append(__sb->gptr(), __size);
643 __sb->__safe_gbump(__size);
644 __extracted += __size;
649 __str += __traits_type::to_char_type(__c);
651 __c = __sb->snextc();
655 if (__traits_type::eq_int_type(__c, __eof))
656 __err |= ios_base::eofbit;
657 else if (__traits_type::eq_int_type(__c, __idelim))
663 __err |= ios_base::failbit;
665 __catch(__cxxabiv1::__forced_unwind&)
667 __in._M_setstate(ios_base::badbit);
668 __throw_exception_again;
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);
679 __err |= ios_base::failbit;
681 __in.setstate(__err);
686 _GLIBCXX_END_NAMESPACE_VERSION