Line data Source code
1 : // Components for manipulating sequences of characters -*- C++ -*-
2 :
3 : // Copyright (C) 1997-2016 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 : // <http://www.gnu.org/licenses/>.
24 :
25 : /** @file bits/basic_string.tcc
26 : * This is an internal header file, included by other library headers.
27 : * Do not attempt to use it directly. @headername{string}
28 : */
29 :
30 : //
31 : // ISO C++ 14882: 21 Strings library
32 : //
33 :
34 : // Written by Jason Merrill based upon the specification by Takanori Adachi
35 : // in ANSI X3J16/94-0013R2. Rewritten by Nathan Myers to ISO-14882.
36 : // Non-reference-counted implementation written by Paolo Carlini and
37 : // updated by Jonathan Wakely for ISO-14882-2011.
38 :
39 : #ifndef _BASIC_STRING_TCC
40 : #define _BASIC_STRING_TCC 1
41 :
42 : #pragma GCC system_header
43 :
44 : #include <bits/cxxabi_forced.h>
45 :
46 : namespace std _GLIBCXX_VISIBILITY(default)
47 : {
48 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
49 :
50 : #if _GLIBCXX_USE_CXX11_ABI
51 :
52 : template<typename _CharT, typename _Traits, typename _Alloc>
53 : const typename basic_string<_CharT, _Traits, _Alloc>::size_type
54 : basic_string<_CharT, _Traits, _Alloc>::npos;
55 :
56 : template<typename _CharT, typename _Traits, typename _Alloc>
57 : void
58 : basic_string<_CharT, _Traits, _Alloc>::
59 : swap(basic_string& __s) _GLIBCXX_NOEXCEPT
60 : {
61 : if (this == &__s)
62 : return;
63 :
64 : _Alloc_traits::_S_on_swap(_M_get_allocator(), __s._M_get_allocator());
65 :
66 : if (_M_is_local())
67 : if (__s._M_is_local())
68 : {
69 : if (length() && __s.length())
70 : {
71 : _CharT __tmp_data[_S_local_capacity + 1];
72 : traits_type::copy(__tmp_data, __s._M_local_buf,
73 : _S_local_capacity + 1);
74 : traits_type::copy(__s._M_local_buf, _M_local_buf,
75 : _S_local_capacity + 1);
76 : traits_type::copy(_M_local_buf, __tmp_data,
77 : _S_local_capacity + 1);
78 : }
79 : else if (__s.length())
80 : {
81 : traits_type::copy(_M_local_buf, __s._M_local_buf,
82 : _S_local_capacity + 1);
83 : _M_length(__s.length());
84 : __s._M_set_length(0);
85 : return;
86 : }
87 : else if (length())
88 : {
89 : traits_type::copy(__s._M_local_buf, _M_local_buf,
90 : _S_local_capacity + 1);
91 : __s._M_length(length());
92 : _M_set_length(0);
93 : return;
94 : }
95 : }
96 : else
97 : {
98 : const size_type __tmp_capacity = __s._M_allocated_capacity;
99 : traits_type::copy(__s._M_local_buf, _M_local_buf,
100 : _S_local_capacity + 1);
101 : _M_data(__s._M_data());
102 : __s._M_data(__s._M_local_buf);
103 : _M_capacity(__tmp_capacity);
104 : }
105 : else
106 : {
107 : const size_type __tmp_capacity = _M_allocated_capacity;
108 : if (__s._M_is_local())
109 : {
110 : traits_type::copy(_M_local_buf, __s._M_local_buf,
111 : _S_local_capacity + 1);
112 : __s._M_data(_M_data());
113 : _M_data(_M_local_buf);
114 : }
115 : else
116 : {
117 : pointer __tmp_ptr = _M_data();
118 : _M_data(__s._M_data());
119 : __s._M_data(__tmp_ptr);
120 : _M_capacity(__s._M_allocated_capacity);
121 : }
122 : __s._M_capacity(__tmp_capacity);
123 : }
124 :
125 : const size_type __tmp_length = length();
126 : _M_length(__s.length());
127 : __s._M_length(__tmp_length);
128 : }
129 :
130 : template<typename _CharT, typename _Traits, typename _Alloc>
131 : typename basic_string<_CharT, _Traits, _Alloc>::pointer
132 : basic_string<_CharT, _Traits, _Alloc>::
133 : _M_create(size_type& __capacity, size_type __old_capacity)
134 : {
135 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
136 : // 83. String::npos vs. string::max_size()
137 : if (__capacity > max_size())
138 : std::__throw_length_error(__N("basic_string::_M_create"));
139 :
140 : // The below implements an exponential growth policy, necessary to
141 : // meet amortized linear time requirements of the library: see
142 : // http://gcc.gnu.org/ml/libstdc++/2001-07/msg00085.html.
143 : if (__capacity > __old_capacity && __capacity < 2 * __old_capacity)
144 : {
145 : __capacity = 2 * __old_capacity;
146 : // Never allocate a string bigger than max_size.
147 : if (__capacity > max_size())
148 : __capacity = max_size();
149 : }
150 :
151 : // NB: Need an array of char_type[__capacity], plus a terminating
152 : // null char_type() element.
153 : return _Alloc_traits::allocate(_M_get_allocator(), __capacity + 1);
154 : }
155 :
156 : // NB: This is the special case for Input Iterators, used in
157 : // istreambuf_iterators, etc.
158 : // Input Iterators have a cost structure very different from
159 : // pointers, calling for a different coding style.
160 : template<typename _CharT, typename _Traits, typename _Alloc>
161 : template<typename _InIterator>
162 : void
163 : basic_string<_CharT, _Traits, _Alloc>::
164 : _M_construct(_InIterator __beg, _InIterator __end,
165 : std::input_iterator_tag)
166 : {
167 : size_type __len = 0;
168 : size_type __capacity = size_type(_S_local_capacity);
169 :
170 : while (__beg != __end && __len < __capacity)
171 : {
172 : _M_data()[__len++] = *__beg;
173 : ++__beg;
174 : }
175 :
176 : __try
177 : {
178 : while (__beg != __end)
179 : {
180 : if (__len == __capacity)
181 : {
182 : // Allocate more space.
183 : __capacity = __len + 1;
184 : pointer __another = _M_create(__capacity, __len);
185 : this->_S_copy(__another, _M_data(), __len);
186 : _M_dispose();
187 : _M_data(__another);
188 : _M_capacity(__capacity);
189 : }
190 : _M_data()[__len++] = *__beg;
191 : ++__beg;
192 : }
193 : }
194 : __catch(...)
195 : {
196 : _M_dispose();
197 : __throw_exception_again;
198 : }
199 :
200 : _M_set_length(__len);
201 : }
202 :
203 : template<typename _CharT, typename _Traits, typename _Alloc>
204 : template<typename _InIterator>
205 : void
206 350 : basic_string<_CharT, _Traits, _Alloc>::
207 : _M_construct(_InIterator __beg, _InIterator __end,
208 : std::forward_iterator_tag)
209 : {
210 : // NB: Not required, but considered best practice.
211 350 : if (__gnu_cxx::__is_null_pointer(__beg) && __beg != __end)
212 0 : std::__throw_logic_error(__N("basic_string::"
213 : "_M_construct null not valid"));
214 :
215 350 : size_type __dnew = static_cast<size_type>(std::distance(__beg, __end));
216 :
217 350 : if (__dnew > size_type(_S_local_capacity))
218 : {
219 0 : _M_data(_M_create(__dnew, size_type(0)));
220 0 : _M_capacity(__dnew);
221 : }
222 :
223 : // Check for out_of_range and length_error exceptions.
224 : __try
225 350 : { this->_S_copy_chars(_M_data(), __beg, __end); }
226 0 : __catch(...)
227 : {
228 0 : _M_dispose();
229 0 : __throw_exception_again;
230 : }
231 :
232 350 : _M_set_length(__dnew);
233 350 : }
234 :
235 : template<typename _CharT, typename _Traits, typename _Alloc>
236 : void
237 : basic_string<_CharT, _Traits, _Alloc>::
238 : _M_construct(size_type __n, _CharT __c)
239 : {
240 : if (__n > size_type(_S_local_capacity))
241 : {
242 : _M_data(_M_create(__n, size_type(0)));
243 : _M_capacity(__n);
244 : }
245 :
246 : if (__n)
247 : this->_S_assign(_M_data(), __n, __c);
248 :
249 : _M_set_length(__n);
250 : }
251 :
252 : template<typename _CharT, typename _Traits, typename _Alloc>
253 : void
254 : basic_string<_CharT, _Traits, _Alloc>::
255 : _M_assign(const basic_string& __str)
256 : {
257 : if (this != &__str)
258 : {
259 : const size_type __rsize = __str.length();
260 : const size_type __capacity = capacity();
261 :
262 : if (__rsize > __capacity)
263 : {
264 : size_type __new_capacity = __rsize;
265 : pointer __tmp = _M_create(__new_capacity, __capacity);
266 : _M_dispose();
267 : _M_data(__tmp);
268 : _M_capacity(__new_capacity);
269 : }
270 :
271 : if (__rsize)
272 : this->_S_copy(_M_data(), __str._M_data(), __rsize);
273 :
274 : _M_set_length(__rsize);
275 : }
276 : }
277 :
278 : template<typename _CharT, typename _Traits, typename _Alloc>
279 : void
280 : basic_string<_CharT, _Traits, _Alloc>::
281 : reserve(size_type __res)
282 : {
283 : // Make sure we don't shrink below the current size.
284 : if (__res < length())
285 : __res = length();
286 :
287 : const size_type __capacity = capacity();
288 : if (__res != __capacity)
289 : {
290 : if (__res > __capacity
291 : || __res > size_type(_S_local_capacity))
292 : {
293 : pointer __tmp = _M_create(__res, __capacity);
294 : this->_S_copy(__tmp, _M_data(), length() + 1);
295 : _M_dispose();
296 : _M_data(__tmp);
297 : _M_capacity(__res);
298 : }
299 : else if (!_M_is_local())
300 : {
301 : this->_S_copy(_M_local_data(), _M_data(), length() + 1);
302 : _M_destroy(__capacity);
303 : _M_data(_M_local_data());
304 : }
305 : }
306 : }
307 :
308 : template<typename _CharT, typename _Traits, typename _Alloc>
309 : void
310 : basic_string<_CharT, _Traits, _Alloc>::
311 : _M_mutate(size_type __pos, size_type __len1, const _CharT* __s,
312 : size_type __len2)
313 : {
314 : const size_type __how_much = length() - __pos - __len1;
315 :
316 : size_type __new_capacity = length() + __len2 - __len1;
317 : pointer __r = _M_create(__new_capacity, capacity());
318 :
319 : if (__pos)
320 : this->_S_copy(__r, _M_data(), __pos);
321 : if (__s && __len2)
322 : this->_S_copy(__r + __pos, __s, __len2);
323 : if (__how_much)
324 : this->_S_copy(__r + __pos + __len2,
325 : _M_data() + __pos + __len1, __how_much);
326 :
327 : _M_dispose();
328 : _M_data(__r);
329 : _M_capacity(__new_capacity);
330 : }
331 :
332 : template<typename _CharT, typename _Traits, typename _Alloc>
333 : void
334 : basic_string<_CharT, _Traits, _Alloc>::
335 : _M_erase(size_type __pos, size_type __n)
336 : {
337 : const size_type __how_much = length() - __pos - __n;
338 :
339 : if (__how_much && __n)
340 : this->_S_move(_M_data() + __pos, _M_data() + __pos + __n, __how_much);
341 :
342 : _M_set_length(length() - __n);
343 : }
344 :
345 : template<typename _CharT, typename _Traits, typename _Alloc>
346 : void
347 : basic_string<_CharT, _Traits, _Alloc>::
348 : resize(size_type __n, _CharT __c)
349 : {
350 : const size_type __size = this->size();
351 : if (__size < __n)
352 : this->append(__n - __size, __c);
353 : else if (__n < __size)
354 : this->_M_erase(__n, __size - __n);
355 : }
356 :
357 : template<typename _CharT, typename _Traits, typename _Alloc>
358 : basic_string<_CharT, _Traits, _Alloc>&
359 : basic_string<_CharT, _Traits, _Alloc>::
360 : _M_append(const _CharT* __s, size_type __n)
361 : {
362 : const size_type __len = __n + this->size();
363 :
364 : if (__len <= this->capacity())
365 : {
366 : if (__n)
367 : this->_S_copy(this->_M_data() + this->size(), __s, __n);
368 : }
369 : else
370 : this->_M_mutate(this->size(), size_type(0), __s, __n);
371 :
372 : this->_M_set_length(__len);
373 : return *this;
374 : }
375 :
376 : template<typename _CharT, typename _Traits, typename _Alloc>
377 : template<typename _InputIterator>
378 : basic_string<_CharT, _Traits, _Alloc>&
379 : basic_string<_CharT, _Traits, _Alloc>::
380 : _M_replace_dispatch(const_iterator __i1, const_iterator __i2,
381 : _InputIterator __k1, _InputIterator __k2,
382 : std::__false_type)
383 : {
384 : const basic_string __s(__k1, __k2);
385 : const size_type __n1 = __i2 - __i1;
386 : return _M_replace(__i1 - begin(), __n1, __s._M_data(),
387 : __s.size());
388 : }
389 :
390 : template<typename _CharT, typename _Traits, typename _Alloc>
391 : basic_string<_CharT, _Traits, _Alloc>&
392 : basic_string<_CharT, _Traits, _Alloc>::
393 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
394 : _CharT __c)
395 : {
396 : _M_check_length(__n1, __n2, "basic_string::_M_replace_aux");
397 :
398 : const size_type __old_size = this->size();
399 : const size_type __new_size = __old_size + __n2 - __n1;
400 :
401 : if (__new_size <= this->capacity())
402 : {
403 : pointer __p = this->_M_data() + __pos1;
404 :
405 : const size_type __how_much = __old_size - __pos1 - __n1;
406 : if (__how_much && __n1 != __n2)
407 : this->_S_move(__p + __n2, __p + __n1, __how_much);
408 : }
409 : else
410 : this->_M_mutate(__pos1, __n1, 0, __n2);
411 :
412 : if (__n2)
413 : this->_S_assign(this->_M_data() + __pos1, __n2, __c);
414 :
415 : this->_M_set_length(__new_size);
416 : return *this;
417 : }
418 :
419 : template<typename _CharT, typename _Traits, typename _Alloc>
420 : basic_string<_CharT, _Traits, _Alloc>&
421 : basic_string<_CharT, _Traits, _Alloc>::
422 : _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
423 : const size_type __len2)
424 : {
425 : _M_check_length(__len1, __len2, "basic_string::_M_replace");
426 :
427 : const size_type __old_size = this->size();
428 : const size_type __new_size = __old_size + __len2 - __len1;
429 :
430 : if (__new_size <= this->capacity())
431 : {
432 : pointer __p = this->_M_data() + __pos;
433 :
434 : const size_type __how_much = __old_size - __pos - __len1;
435 : if (_M_disjunct(__s))
436 : {
437 : if (__how_much && __len1 != __len2)
438 : this->_S_move(__p + __len2, __p + __len1, __how_much);
439 : if (__len2)
440 : this->_S_copy(__p, __s, __len2);
441 : }
442 : else
443 : {
444 : // Work in-place.
445 : if (__len2 && __len2 <= __len1)
446 : this->_S_move(__p, __s, __len2);
447 : if (__how_much && __len1 != __len2)
448 : this->_S_move(__p + __len2, __p + __len1, __how_much);
449 : if (__len2 > __len1)
450 : {
451 : if (__s + __len2 <= __p + __len1)
452 : this->_S_move(__p, __s, __len2);
453 : else if (__s >= __p + __len1)
454 : this->_S_copy(__p, __s + __len2 - __len1, __len2);
455 : else
456 : {
457 : const size_type __nleft = (__p + __len1) - __s;
458 : this->_S_move(__p, __s, __nleft);
459 : this->_S_copy(__p + __nleft, __p + __len2,
460 : __len2 - __nleft);
461 : }
462 : }
463 : }
464 : }
465 : else
466 : this->_M_mutate(__pos, __len1, __s, __len2);
467 :
468 : this->_M_set_length(__new_size);
469 : return *this;
470 : }
471 :
472 : template<typename _CharT, typename _Traits, typename _Alloc>
473 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
474 : basic_string<_CharT, _Traits, _Alloc>::
475 : copy(_CharT* __s, size_type __n, size_type __pos) const
476 : {
477 : _M_check(__pos, "basic_string::copy");
478 : __n = _M_limit(__pos, __n);
479 : __glibcxx_requires_string_len(__s, __n);
480 : if (__n)
481 : _S_copy(__s, _M_data() + __pos, __n);
482 : // 21.3.5.7 par 3: do not append null. (good.)
483 : return __n;
484 : }
485 :
486 : #else // !_GLIBCXX_USE_CXX11_ABI
487 :
488 : template<typename _CharT, typename _Traits, typename _Alloc>
489 : const typename basic_string<_CharT, _Traits, _Alloc>::size_type
490 : basic_string<_CharT, _Traits, _Alloc>::
491 : _Rep::_S_max_size = (((npos - sizeof(_Rep_base))/sizeof(_CharT)) - 1) / 4;
492 :
493 : template<typename _CharT, typename _Traits, typename _Alloc>
494 : const _CharT
495 : basic_string<_CharT, _Traits, _Alloc>::
496 : _Rep::_S_terminal = _CharT();
497 :
498 : template<typename _CharT, typename _Traits, typename _Alloc>
499 : const typename basic_string<_CharT, _Traits, _Alloc>::size_type
500 : basic_string<_CharT, _Traits, _Alloc>::npos;
501 :
502 : // Linker sets _S_empty_rep_storage to all 0s (one reference, empty string)
503 : // at static init time (before static ctors are run).
504 : template<typename _CharT, typename _Traits, typename _Alloc>
505 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
506 : basic_string<_CharT, _Traits, _Alloc>::_Rep::_S_empty_rep_storage[
507 : (sizeof(_Rep_base) + sizeof(_CharT) + sizeof(size_type) - 1) /
508 : sizeof(size_type)];
509 :
510 : // NB: This is the special case for Input Iterators, used in
511 : // istreambuf_iterators, etc.
512 : // Input Iterators have a cost structure very different from
513 : // pointers, calling for a different coding style.
514 : template<typename _CharT, typename _Traits, typename _Alloc>
515 : template<typename _InIterator>
516 : _CharT*
517 : basic_string<_CharT, _Traits, _Alloc>::
518 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
519 : input_iterator_tag)
520 : {
521 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
522 : if (__beg == __end && __a == _Alloc())
523 : return _S_empty_rep()._M_refdata();
524 : #endif
525 : // Avoid reallocation for common case.
526 : _CharT __buf[128];
527 : size_type __len = 0;
528 : while (__beg != __end && __len < sizeof(__buf) / sizeof(_CharT))
529 : {
530 : __buf[__len++] = *__beg;
531 : ++__beg;
532 : }
533 : _Rep* __r = _Rep::_S_create(__len, size_type(0), __a);
534 : _M_copy(__r->_M_refdata(), __buf, __len);
535 : __try
536 : {
537 : while (__beg != __end)
538 : {
539 : if (__len == __r->_M_capacity)
540 : {
541 : // Allocate more space.
542 : _Rep* __another = _Rep::_S_create(__len + 1, __len, __a);
543 : _M_copy(__another->_M_refdata(), __r->_M_refdata(), __len);
544 : __r->_M_destroy(__a);
545 : __r = __another;
546 : }
547 : __r->_M_refdata()[__len++] = *__beg;
548 : ++__beg;
549 : }
550 : }
551 : __catch(...)
552 : {
553 : __r->_M_destroy(__a);
554 : __throw_exception_again;
555 : }
556 : __r->_M_set_length_and_sharable(__len);
557 : return __r->_M_refdata();
558 : }
559 :
560 : template<typename _CharT, typename _Traits, typename _Alloc>
561 : template <typename _InIterator>
562 : _CharT*
563 : basic_string<_CharT, _Traits, _Alloc>::
564 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
565 : forward_iterator_tag)
566 : {
567 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
568 : if (__beg == __end && __a == _Alloc())
569 : return _S_empty_rep()._M_refdata();
570 : #endif
571 : // NB: Not required, but considered best practice.
572 : if (__gnu_cxx::__is_null_pointer(__beg) && __beg != __end)
573 : __throw_logic_error(__N("basic_string::_S_construct null not valid"));
574 :
575 : const size_type __dnew = static_cast<size_type>(std::distance(__beg,
576 : __end));
577 : // Check for out_of_range and length_error exceptions.
578 : _Rep* __r = _Rep::_S_create(__dnew, size_type(0), __a);
579 : __try
580 : { _S_copy_chars(__r->_M_refdata(), __beg, __end); }
581 : __catch(...)
582 : {
583 : __r->_M_destroy(__a);
584 : __throw_exception_again;
585 : }
586 : __r->_M_set_length_and_sharable(__dnew);
587 : return __r->_M_refdata();
588 : }
589 :
590 : template<typename _CharT, typename _Traits, typename _Alloc>
591 : _CharT*
592 : basic_string<_CharT, _Traits, _Alloc>::
593 : _S_construct(size_type __n, _CharT __c, const _Alloc& __a)
594 : {
595 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
596 : if (__n == 0 && __a == _Alloc())
597 : return _S_empty_rep()._M_refdata();
598 : #endif
599 : // Check for out_of_range and length_error exceptions.
600 : _Rep* __r = _Rep::_S_create(__n, size_type(0), __a);
601 : if (__n)
602 : _M_assign(__r->_M_refdata(), __n, __c);
603 :
604 : __r->_M_set_length_and_sharable(__n);
605 : return __r->_M_refdata();
606 : }
607 :
608 : template<typename _CharT, typename _Traits, typename _Alloc>
609 : basic_string<_CharT, _Traits, _Alloc>::
610 : basic_string(const basic_string& __str)
611 : : _M_dataplus(__str._M_rep()->_M_grab(_Alloc(__str.get_allocator()),
612 : __str.get_allocator()),
613 : __str.get_allocator())
614 : { }
615 :
616 : template<typename _CharT, typename _Traits, typename _Alloc>
617 : basic_string<_CharT, _Traits, _Alloc>::
618 : basic_string(const _Alloc& __a)
619 : : _M_dataplus(_S_construct(size_type(), _CharT(), __a), __a)
620 : { }
621 :
622 : template<typename _CharT, typename _Traits, typename _Alloc>
623 : basic_string<_CharT, _Traits, _Alloc>::
624 : basic_string(const basic_string& __str, size_type __pos, size_type __n)
625 : : _M_dataplus(_S_construct(__str._M_data()
626 : + __str._M_check(__pos,
627 : "basic_string::basic_string"),
628 : __str._M_data() + __str._M_limit(__pos, __n)
629 : + __pos, _Alloc()), _Alloc())
630 : { }
631 :
632 : template<typename _CharT, typename _Traits, typename _Alloc>
633 : basic_string<_CharT, _Traits, _Alloc>::
634 : basic_string(const basic_string& __str, size_type __pos,
635 : size_type __n, const _Alloc& __a)
636 : : _M_dataplus(_S_construct(__str._M_data()
637 : + __str._M_check(__pos,
638 : "basic_string::basic_string"),
639 : __str._M_data() + __str._M_limit(__pos, __n)
640 : + __pos, __a), __a)
641 : { }
642 :
643 : // TBD: DPG annotate
644 : template<typename _CharT, typename _Traits, typename _Alloc>
645 : basic_string<_CharT, _Traits, _Alloc>::
646 : basic_string(const _CharT* __s, size_type __n, const _Alloc& __a)
647 : : _M_dataplus(_S_construct(__s, __s + __n, __a), __a)
648 : { }
649 :
650 : // TBD: DPG annotate
651 : template<typename _CharT, typename _Traits, typename _Alloc>
652 : basic_string<_CharT, _Traits, _Alloc>::
653 : basic_string(const _CharT* __s, const _Alloc& __a)
654 : : _M_dataplus(_S_construct(__s, __s ? __s + traits_type::length(__s) :
655 : __s + npos, __a), __a)
656 : { }
657 :
658 : template<typename _CharT, typename _Traits, typename _Alloc>
659 : basic_string<_CharT, _Traits, _Alloc>::
660 : basic_string(size_type __n, _CharT __c, const _Alloc& __a)
661 : : _M_dataplus(_S_construct(__n, __c, __a), __a)
662 : { }
663 :
664 : // TBD: DPG annotate
665 : template<typename _CharT, typename _Traits, typename _Alloc>
666 : template<typename _InputIterator>
667 : basic_string<_CharT, _Traits, _Alloc>::
668 : basic_string(_InputIterator __beg, _InputIterator __end, const _Alloc& __a)
669 : : _M_dataplus(_S_construct(__beg, __end, __a), __a)
670 : { }
671 :
672 : #if __cplusplus >= 201103L
673 : template<typename _CharT, typename _Traits, typename _Alloc>
674 : basic_string<_CharT, _Traits, _Alloc>::
675 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a)
676 : : _M_dataplus(_S_construct(__l.begin(), __l.end(), __a), __a)
677 : { }
678 : #endif
679 :
680 : template<typename _CharT, typename _Traits, typename _Alloc>
681 : basic_string<_CharT, _Traits, _Alloc>&
682 : basic_string<_CharT, _Traits, _Alloc>::
683 : assign(const basic_string& __str)
684 : {
685 : if (_M_rep() != __str._M_rep())
686 : {
687 : // XXX MT
688 : const allocator_type __a = this->get_allocator();
689 : _CharT* __tmp = __str._M_rep()->_M_grab(__a, __str.get_allocator());
690 : _M_rep()->_M_dispose(__a);
691 : _M_data(__tmp);
692 : }
693 : return *this;
694 : }
695 :
696 : template<typename _CharT, typename _Traits, typename _Alloc>
697 : basic_string<_CharT, _Traits, _Alloc>&
698 : basic_string<_CharT, _Traits, _Alloc>::
699 : assign(const _CharT* __s, size_type __n)
700 : {
701 : __glibcxx_requires_string_len(__s, __n);
702 : _M_check_length(this->size(), __n, "basic_string::assign");
703 : if (_M_disjunct(__s) || _M_rep()->_M_is_shared())
704 : return _M_replace_safe(size_type(0), this->size(), __s, __n);
705 : else
706 : {
707 : // Work in-place.
708 : const size_type __pos = __s - _M_data();
709 : if (__pos >= __n)
710 : _M_copy(_M_data(), __s, __n);
711 : else if (__pos)
712 : _M_move(_M_data(), __s, __n);
713 : _M_rep()->_M_set_length_and_sharable(__n);
714 : return *this;
715 : }
716 : }
717 :
718 : template<typename _CharT, typename _Traits, typename _Alloc>
719 : basic_string<_CharT, _Traits, _Alloc>&
720 : basic_string<_CharT, _Traits, _Alloc>::
721 : append(size_type __n, _CharT __c)
722 : {
723 : if (__n)
724 : {
725 : _M_check_length(size_type(0), __n, "basic_string::append");
726 : const size_type __len = __n + this->size();
727 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
728 : this->reserve(__len);
729 : _M_assign(_M_data() + this->size(), __n, __c);
730 : _M_rep()->_M_set_length_and_sharable(__len);
731 : }
732 : return *this;
733 : }
734 :
735 : template<typename _CharT, typename _Traits, typename _Alloc>
736 : basic_string<_CharT, _Traits, _Alloc>&
737 : basic_string<_CharT, _Traits, _Alloc>::
738 : append(const _CharT* __s, size_type __n)
739 : {
740 : __glibcxx_requires_string_len(__s, __n);
741 : if (__n)
742 : {
743 : _M_check_length(size_type(0), __n, "basic_string::append");
744 : const size_type __len = __n + this->size();
745 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
746 : {
747 : if (_M_disjunct(__s))
748 : this->reserve(__len);
749 : else
750 : {
751 : const size_type __off = __s - _M_data();
752 : this->reserve(__len);
753 : __s = _M_data() + __off;
754 : }
755 : }
756 : _M_copy(_M_data() + this->size(), __s, __n);
757 : _M_rep()->_M_set_length_and_sharable(__len);
758 : }
759 : return *this;
760 : }
761 :
762 : template<typename _CharT, typename _Traits, typename _Alloc>
763 : basic_string<_CharT, _Traits, _Alloc>&
764 : basic_string<_CharT, _Traits, _Alloc>::
765 : append(const basic_string& __str)
766 : {
767 : const size_type __size = __str.size();
768 : if (__size)
769 : {
770 : const size_type __len = __size + this->size();
771 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
772 : this->reserve(__len);
773 : _M_copy(_M_data() + this->size(), __str._M_data(), __size);
774 : _M_rep()->_M_set_length_and_sharable(__len);
775 : }
776 : return *this;
777 : }
778 :
779 : template<typename _CharT, typename _Traits, typename _Alloc>
780 : basic_string<_CharT, _Traits, _Alloc>&
781 : basic_string<_CharT, _Traits, _Alloc>::
782 : append(const basic_string& __str, size_type __pos, size_type __n)
783 : {
784 : __str._M_check(__pos, "basic_string::append");
785 : __n = __str._M_limit(__pos, __n);
786 : if (__n)
787 : {
788 : const size_type __len = __n + this->size();
789 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
790 : this->reserve(__len);
791 : _M_copy(_M_data() + this->size(), __str._M_data() + __pos, __n);
792 : _M_rep()->_M_set_length_and_sharable(__len);
793 : }
794 : return *this;
795 : }
796 :
797 : template<typename _CharT, typename _Traits, typename _Alloc>
798 : basic_string<_CharT, _Traits, _Alloc>&
799 : basic_string<_CharT, _Traits, _Alloc>::
800 : insert(size_type __pos, const _CharT* __s, size_type __n)
801 : {
802 : __glibcxx_requires_string_len(__s, __n);
803 : _M_check(__pos, "basic_string::insert");
804 : _M_check_length(size_type(0), __n, "basic_string::insert");
805 : if (_M_disjunct(__s) || _M_rep()->_M_is_shared())
806 : return _M_replace_safe(__pos, size_type(0), __s, __n);
807 : else
808 : {
809 : // Work in-place.
810 : const size_type __off = __s - _M_data();
811 : _M_mutate(__pos, 0, __n);
812 : __s = _M_data() + __off;
813 : _CharT* __p = _M_data() + __pos;
814 : if (__s + __n <= __p)
815 : _M_copy(__p, __s, __n);
816 : else if (__s >= __p)
817 : _M_copy(__p, __s + __n, __n);
818 : else
819 : {
820 : const size_type __nleft = __p - __s;
821 : _M_copy(__p, __s, __nleft);
822 : _M_copy(__p + __nleft, __p + __n, __n - __nleft);
823 : }
824 : return *this;
825 : }
826 : }
827 :
828 : template<typename _CharT, typename _Traits, typename _Alloc>
829 : typename basic_string<_CharT, _Traits, _Alloc>::iterator
830 : basic_string<_CharT, _Traits, _Alloc>::
831 : erase(iterator __first, iterator __last)
832 : {
833 : _GLIBCXX_DEBUG_PEDASSERT(__first >= _M_ibegin() && __first <= __last
834 : && __last <= _M_iend());
835 :
836 : // NB: This isn't just an optimization (bail out early when
837 : // there is nothing to do, really), it's also a correctness
838 : // issue vs MT, see libstdc++/40518.
839 : const size_type __size = __last - __first;
840 : if (__size)
841 : {
842 : const size_type __pos = __first - _M_ibegin();
843 : _M_mutate(__pos, __size, size_type(0));
844 : _M_rep()->_M_set_leaked();
845 : return iterator(_M_data() + __pos);
846 : }
847 : else
848 : return __first;
849 : }
850 :
851 : template<typename _CharT, typename _Traits, typename _Alloc>
852 : basic_string<_CharT, _Traits, _Alloc>&
853 : basic_string<_CharT, _Traits, _Alloc>::
854 : replace(size_type __pos, size_type __n1, const _CharT* __s,
855 : size_type __n2)
856 : {
857 : __glibcxx_requires_string_len(__s, __n2);
858 : _M_check(__pos, "basic_string::replace");
859 : __n1 = _M_limit(__pos, __n1);
860 : _M_check_length(__n1, __n2, "basic_string::replace");
861 : bool __left;
862 : if (_M_disjunct(__s) || _M_rep()->_M_is_shared())
863 : return _M_replace_safe(__pos, __n1, __s, __n2);
864 : else if ((__left = __s + __n2 <= _M_data() + __pos)
865 : || _M_data() + __pos + __n1 <= __s)
866 : {
867 : // Work in-place: non-overlapping case.
868 : size_type __off = __s - _M_data();
869 : __left ? __off : (__off += __n2 - __n1);
870 : _M_mutate(__pos, __n1, __n2);
871 : _M_copy(_M_data() + __pos, _M_data() + __off, __n2);
872 : return *this;
873 : }
874 : else
875 : {
876 : // Todo: overlapping case.
877 : const basic_string __tmp(__s, __n2);
878 : return _M_replace_safe(__pos, __n1, __tmp._M_data(), __n2);
879 : }
880 : }
881 :
882 : template<typename _CharT, typename _Traits, typename _Alloc>
883 : void
884 : basic_string<_CharT, _Traits, _Alloc>::_Rep::
885 : _M_destroy(const _Alloc& __a) throw ()
886 : {
887 : const size_type __size = sizeof(_Rep_base) +
888 : (this->_M_capacity + 1) * sizeof(_CharT);
889 : _Raw_bytes_alloc(__a).deallocate(reinterpret_cast<char*>(this), __size);
890 : }
891 :
892 : template<typename _CharT, typename _Traits, typename _Alloc>
893 : void
894 : basic_string<_CharT, _Traits, _Alloc>::
895 : _M_leak_hard()
896 : {
897 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
898 : if (_M_rep() == &_S_empty_rep())
899 : return;
900 : #endif
901 : if (_M_rep()->_M_is_shared())
902 : _M_mutate(0, 0, 0);
903 : _M_rep()->_M_set_leaked();
904 : }
905 :
906 : template<typename _CharT, typename _Traits, typename _Alloc>
907 : void
908 : basic_string<_CharT, _Traits, _Alloc>::
909 : _M_mutate(size_type __pos, size_type __len1, size_type __len2)
910 : {
911 : const size_type __old_size = this->size();
912 : const size_type __new_size = __old_size + __len2 - __len1;
913 : const size_type __how_much = __old_size - __pos - __len1;
914 :
915 : if (__new_size > this->capacity() || _M_rep()->_M_is_shared())
916 : {
917 : // Must reallocate.
918 : const allocator_type __a = get_allocator();
919 : _Rep* __r = _Rep::_S_create(__new_size, this->capacity(), __a);
920 :
921 : if (__pos)
922 : _M_copy(__r->_M_refdata(), _M_data(), __pos);
923 : if (__how_much)
924 : _M_copy(__r->_M_refdata() + __pos + __len2,
925 : _M_data() + __pos + __len1, __how_much);
926 :
927 : _M_rep()->_M_dispose(__a);
928 : _M_data(__r->_M_refdata());
929 : }
930 : else if (__how_much && __len1 != __len2)
931 : {
932 : // Work in-place.
933 : _M_move(_M_data() + __pos + __len2,
934 : _M_data() + __pos + __len1, __how_much);
935 : }
936 : _M_rep()->_M_set_length_and_sharable(__new_size);
937 : }
938 :
939 : template<typename _CharT, typename _Traits, typename _Alloc>
940 : void
941 : basic_string<_CharT, _Traits, _Alloc>::
942 : reserve(size_type __res)
943 : {
944 : if (__res != this->capacity() || _M_rep()->_M_is_shared())
945 : {
946 : // Make sure we don't shrink below the current size
947 : if (__res < this->size())
948 : __res = this->size();
949 : const allocator_type __a = get_allocator();
950 : _CharT* __tmp = _M_rep()->_M_clone(__a, __res - this->size());
951 : _M_rep()->_M_dispose(__a);
952 : _M_data(__tmp);
953 : }
954 : }
955 :
956 : template<typename _CharT, typename _Traits, typename _Alloc>
957 : void
958 : basic_string<_CharT, _Traits, _Alloc>::
959 : swap(basic_string& __s)
960 : {
961 : if (_M_rep()->_M_is_leaked())
962 : _M_rep()->_M_set_sharable();
963 : if (__s._M_rep()->_M_is_leaked())
964 : __s._M_rep()->_M_set_sharable();
965 : if (this->get_allocator() == __s.get_allocator())
966 : {
967 : _CharT* __tmp = _M_data();
968 : _M_data(__s._M_data());
969 : __s._M_data(__tmp);
970 : }
971 : // The code below can usually be optimized away.
972 : else
973 : {
974 : const basic_string __tmp1(_M_ibegin(), _M_iend(),
975 : __s.get_allocator());
976 : const basic_string __tmp2(__s._M_ibegin(), __s._M_iend(),
977 : this->get_allocator());
978 : *this = __tmp2;
979 : __s = __tmp1;
980 : }
981 : }
982 :
983 : template<typename _CharT, typename _Traits, typename _Alloc>
984 : typename basic_string<_CharT, _Traits, _Alloc>::_Rep*
985 : basic_string<_CharT, _Traits, _Alloc>::_Rep::
986 : _S_create(size_type __capacity, size_type __old_capacity,
987 : const _Alloc& __alloc)
988 : {
989 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
990 : // 83. String::npos vs. string::max_size()
991 : if (__capacity > _S_max_size)
992 : __throw_length_error(__N("basic_string::_S_create"));
993 :
994 : // The standard places no restriction on allocating more memory
995 : // than is strictly needed within this layer at the moment or as
996 : // requested by an explicit application call to reserve().
997 :
998 : // Many malloc implementations perform quite poorly when an
999 : // application attempts to allocate memory in a stepwise fashion
1000 : // growing each allocation size by only 1 char. Additionally,
1001 : // it makes little sense to allocate less linear memory than the
1002 : // natural blocking size of the malloc implementation.
1003 : // Unfortunately, we would need a somewhat low-level calculation
1004 : // with tuned parameters to get this perfect for any particular
1005 : // malloc implementation. Fortunately, generalizations about
1006 : // common features seen among implementations seems to suffice.
1007 :
1008 : // __pagesize need not match the actual VM page size for good
1009 : // results in practice, thus we pick a common value on the low
1010 : // side. __malloc_header_size is an estimate of the amount of
1011 : // overhead per memory allocation (in practice seen N * sizeof
1012 : // (void*) where N is 0, 2 or 4). According to folklore,
1013 : // picking this value on the high side is better than
1014 : // low-balling it (especially when this algorithm is used with
1015 : // malloc implementations that allocate memory blocks rounded up
1016 : // to a size which is a power of 2).
1017 : const size_type __pagesize = 4096;
1018 : const size_type __malloc_header_size = 4 * sizeof(void*);
1019 :
1020 : // The below implements an exponential growth policy, necessary to
1021 : // meet amortized linear time requirements of the library: see
1022 : // http://gcc.gnu.org/ml/libstdc++/2001-07/msg00085.html.
1023 : // It's active for allocations requiring an amount of memory above
1024 : // system pagesize. This is consistent with the requirements of the
1025 : // standard: http://gcc.gnu.org/ml/libstdc++/2001-07/msg00130.html
1026 : if (__capacity > __old_capacity && __capacity < 2 * __old_capacity)
1027 : __capacity = 2 * __old_capacity;
1028 :
1029 : // NB: Need an array of char_type[__capacity], plus a terminating
1030 : // null char_type() element, plus enough for the _Rep data structure.
1031 : // Whew. Seemingly so needy, yet so elemental.
1032 : size_type __size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
1033 :
1034 : const size_type __adj_size = __size + __malloc_header_size;
1035 : if (__adj_size > __pagesize && __capacity > __old_capacity)
1036 : {
1037 : const size_type __extra = __pagesize - __adj_size % __pagesize;
1038 : __capacity += __extra / sizeof(_CharT);
1039 : // Never allocate a string bigger than _S_max_size.
1040 : if (__capacity > _S_max_size)
1041 : __capacity = _S_max_size;
1042 : __size = (__capacity + 1) * sizeof(_CharT) + sizeof(_Rep);
1043 : }
1044 :
1045 : // NB: Might throw, but no worries about a leak, mate: _Rep()
1046 : // does not throw.
1047 : void* __place = _Raw_bytes_alloc(__alloc).allocate(__size);
1048 : _Rep *__p = new (__place) _Rep;
1049 : __p->_M_capacity = __capacity;
1050 : // ABI compatibility - 3.4.x set in _S_create both
1051 : // _M_refcount and _M_length. All callers of _S_create
1052 : // in basic_string.tcc then set just _M_length.
1053 : // In 4.0.x and later both _M_refcount and _M_length
1054 : // are initialized in the callers, unfortunately we can
1055 : // have 3.4.x compiled code with _S_create callers inlined
1056 : // calling 4.0.x+ _S_create.
1057 : __p->_M_set_sharable();
1058 : return __p;
1059 : }
1060 :
1061 : template<typename _CharT, typename _Traits, typename _Alloc>
1062 : _CharT*
1063 : basic_string<_CharT, _Traits, _Alloc>::_Rep::
1064 : _M_clone(const _Alloc& __alloc, size_type __res)
1065 : {
1066 : // Requested capacity of the clone.
1067 : const size_type __requested_cap = this->_M_length + __res;
1068 : _Rep* __r = _Rep::_S_create(__requested_cap, this->_M_capacity,
1069 : __alloc);
1070 : if (this->_M_length)
1071 : _M_copy(__r->_M_refdata(), _M_refdata(), this->_M_length);
1072 :
1073 : __r->_M_set_length_and_sharable(this->_M_length);
1074 : return __r->_M_refdata();
1075 : }
1076 :
1077 : template<typename _CharT, typename _Traits, typename _Alloc>
1078 : void
1079 : basic_string<_CharT, _Traits, _Alloc>::
1080 : resize(size_type __n, _CharT __c)
1081 : {
1082 : const size_type __size = this->size();
1083 : _M_check_length(__size, __n, "basic_string::resize");
1084 : if (__size < __n)
1085 : this->append(__n - __size, __c);
1086 : else if (__n < __size)
1087 : this->erase(__n);
1088 : // else nothing (in particular, avoid calling _M_mutate() unnecessarily.)
1089 : }
1090 :
1091 : template<typename _CharT, typename _Traits, typename _Alloc>
1092 : template<typename _InputIterator>
1093 : basic_string<_CharT, _Traits, _Alloc>&
1094 : basic_string<_CharT, _Traits, _Alloc>::
1095 : _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
1096 : _InputIterator __k2, __false_type)
1097 : {
1098 : const basic_string __s(__k1, __k2);
1099 : const size_type __n1 = __i2 - __i1;
1100 : _M_check_length(__n1, __s.size(), "basic_string::_M_replace_dispatch");
1101 : return _M_replace_safe(__i1 - _M_ibegin(), __n1, __s._M_data(),
1102 : __s.size());
1103 : }
1104 :
1105 : template<typename _CharT, typename _Traits, typename _Alloc>
1106 : basic_string<_CharT, _Traits, _Alloc>&
1107 : basic_string<_CharT, _Traits, _Alloc>::
1108 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
1109 : _CharT __c)
1110 : {
1111 : _M_check_length(__n1, __n2, "basic_string::_M_replace_aux");
1112 : _M_mutate(__pos1, __n1, __n2);
1113 : if (__n2)
1114 : _M_assign(_M_data() + __pos1, __n2, __c);
1115 : return *this;
1116 : }
1117 :
1118 : template<typename _CharT, typename _Traits, typename _Alloc>
1119 : basic_string<_CharT, _Traits, _Alloc>&
1120 : basic_string<_CharT, _Traits, _Alloc>::
1121 : _M_replace_safe(size_type __pos1, size_type __n1, const _CharT* __s,
1122 : size_type __n2)
1123 : {
1124 : _M_mutate(__pos1, __n1, __n2);
1125 : if (__n2)
1126 : _M_copy(_M_data() + __pos1, __s, __n2);
1127 : return *this;
1128 : }
1129 :
1130 : template<typename _CharT, typename _Traits, typename _Alloc>
1131 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1132 : basic_string<_CharT, _Traits, _Alloc>::
1133 : copy(_CharT* __s, size_type __n, size_type __pos) const
1134 : {
1135 : _M_check(__pos, "basic_string::copy");
1136 : __n = _M_limit(__pos, __n);
1137 : __glibcxx_requires_string_len(__s, __n);
1138 : if (__n)
1139 : _M_copy(__s, _M_data() + __pos, __n);
1140 : // 21.3.5.7 par 3: do not append null. (good.)
1141 : return __n;
1142 : }
1143 : #endif // !_GLIBCXX_USE_CXX11_ABI
1144 :
1145 : template<typename _CharT, typename _Traits, typename _Alloc>
1146 : basic_string<_CharT, _Traits, _Alloc>
1147 : operator+(const _CharT* __lhs,
1148 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
1149 : {
1150 : __glibcxx_requires_string(__lhs);
1151 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
1152 : typedef typename __string_type::size_type __size_type;
1153 : const __size_type __len = _Traits::length(__lhs);
1154 : __string_type __str;
1155 : __str.reserve(__len + __rhs.size());
1156 : __str.append(__lhs, __len);
1157 : __str.append(__rhs);
1158 : return __str;
1159 : }
1160 :
1161 : template<typename _CharT, typename _Traits, typename _Alloc>
1162 : basic_string<_CharT, _Traits, _Alloc>
1163 : operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Alloc>& __rhs)
1164 : {
1165 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
1166 : typedef typename __string_type::size_type __size_type;
1167 : __string_type __str;
1168 : const __size_type __len = __rhs.size();
1169 : __str.reserve(__len + 1);
1170 : __str.append(__size_type(1), __lhs);
1171 : __str.append(__rhs);
1172 : return __str;
1173 : }
1174 :
1175 : template<typename _CharT, typename _Traits, typename _Alloc>
1176 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1177 : basic_string<_CharT, _Traits, _Alloc>::
1178 : find(const _CharT* __s, size_type __pos, size_type __n) const
1179 : {
1180 : __glibcxx_requires_string_len(__s, __n);
1181 : const size_type __size = this->size();
1182 : const _CharT* __data = _M_data();
1183 :
1184 : if (__n == 0)
1185 : return __pos <= __size ? __pos : npos;
1186 :
1187 : if (__n <= __size)
1188 : {
1189 : for (; __pos <= __size - __n; ++__pos)
1190 : if (traits_type::eq(__data[__pos], __s[0])
1191 : && traits_type::compare(__data + __pos + 1,
1192 : __s + 1, __n - 1) == 0)
1193 : return __pos;
1194 : }
1195 : return npos;
1196 : }
1197 :
1198 : template<typename _CharT, typename _Traits, typename _Alloc>
1199 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1200 : basic_string<_CharT, _Traits, _Alloc>::
1201 : find(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
1202 : {
1203 : size_type __ret = npos;
1204 : const size_type __size = this->size();
1205 : if (__pos < __size)
1206 : {
1207 : const _CharT* __data = _M_data();
1208 : const size_type __n = __size - __pos;
1209 : const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
1210 : if (__p)
1211 : __ret = __p - __data;
1212 : }
1213 : return __ret;
1214 : }
1215 :
1216 : template<typename _CharT, typename _Traits, typename _Alloc>
1217 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1218 : basic_string<_CharT, _Traits, _Alloc>::
1219 : rfind(const _CharT* __s, size_type __pos, size_type __n) const
1220 : {
1221 : __glibcxx_requires_string_len(__s, __n);
1222 : const size_type __size = this->size();
1223 : if (__n <= __size)
1224 : {
1225 : __pos = std::min(size_type(__size - __n), __pos);
1226 : const _CharT* __data = _M_data();
1227 : do
1228 : {
1229 : if (traits_type::compare(__data + __pos, __s, __n) == 0)
1230 : return __pos;
1231 : }
1232 : while (__pos-- > 0);
1233 : }
1234 : return npos;
1235 : }
1236 :
1237 : template<typename _CharT, typename _Traits, typename _Alloc>
1238 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1239 : basic_string<_CharT, _Traits, _Alloc>::
1240 : rfind(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
1241 : {
1242 : size_type __size = this->size();
1243 : if (__size)
1244 : {
1245 : if (--__size > __pos)
1246 : __size = __pos;
1247 : for (++__size; __size-- > 0; )
1248 : if (traits_type::eq(_M_data()[__size], __c))
1249 : return __size;
1250 : }
1251 : return npos;
1252 : }
1253 :
1254 : template<typename _CharT, typename _Traits, typename _Alloc>
1255 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1256 : basic_string<_CharT, _Traits, _Alloc>::
1257 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
1258 : {
1259 : __glibcxx_requires_string_len(__s, __n);
1260 : for (; __n && __pos < this->size(); ++__pos)
1261 : {
1262 : const _CharT* __p = traits_type::find(__s, __n, _M_data()[__pos]);
1263 : if (__p)
1264 : return __pos;
1265 : }
1266 : return npos;
1267 : }
1268 :
1269 : template<typename _CharT, typename _Traits, typename _Alloc>
1270 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1271 : basic_string<_CharT, _Traits, _Alloc>::
1272 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
1273 : {
1274 : __glibcxx_requires_string_len(__s, __n);
1275 : size_type __size = this->size();
1276 : if (__size && __n)
1277 : {
1278 : if (--__size > __pos)
1279 : __size = __pos;
1280 : do
1281 : {
1282 : if (traits_type::find(__s, __n, _M_data()[__size]))
1283 : return __size;
1284 : }
1285 : while (__size-- != 0);
1286 : }
1287 : return npos;
1288 : }
1289 :
1290 : template<typename _CharT, typename _Traits, typename _Alloc>
1291 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1292 : basic_string<_CharT, _Traits, _Alloc>::
1293 : find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
1294 : {
1295 : __glibcxx_requires_string_len(__s, __n);
1296 : for (; __pos < this->size(); ++__pos)
1297 : if (!traits_type::find(__s, __n, _M_data()[__pos]))
1298 : return __pos;
1299 : return npos;
1300 : }
1301 :
1302 : template<typename _CharT, typename _Traits, typename _Alloc>
1303 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1304 : basic_string<_CharT, _Traits, _Alloc>::
1305 : find_first_not_of(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
1306 : {
1307 : for (; __pos < this->size(); ++__pos)
1308 : if (!traits_type::eq(_M_data()[__pos], __c))
1309 : return __pos;
1310 : return npos;
1311 : }
1312 :
1313 : template<typename _CharT, typename _Traits, typename _Alloc>
1314 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1315 : basic_string<_CharT, _Traits, _Alloc>::
1316 : find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
1317 : {
1318 : __glibcxx_requires_string_len(__s, __n);
1319 : size_type __size = this->size();
1320 : if (__size)
1321 : {
1322 : if (--__size > __pos)
1323 : __size = __pos;
1324 : do
1325 : {
1326 : if (!traits_type::find(__s, __n, _M_data()[__size]))
1327 : return __size;
1328 : }
1329 : while (__size--);
1330 : }
1331 : return npos;
1332 : }
1333 :
1334 : template<typename _CharT, typename _Traits, typename _Alloc>
1335 : typename basic_string<_CharT, _Traits, _Alloc>::size_type
1336 : basic_string<_CharT, _Traits, _Alloc>::
1337 : find_last_not_of(_CharT __c, size_type __pos) const _GLIBCXX_NOEXCEPT
1338 : {
1339 : size_type __size = this->size();
1340 : if (__size)
1341 : {
1342 : if (--__size > __pos)
1343 : __size = __pos;
1344 : do
1345 : {
1346 : if (!traits_type::eq(_M_data()[__size], __c))
1347 : return __size;
1348 : }
1349 : while (__size--);
1350 : }
1351 : return npos;
1352 : }
1353 :
1354 : template<typename _CharT, typename _Traits, typename _Alloc>
1355 : int
1356 : basic_string<_CharT, _Traits, _Alloc>::
1357 : compare(size_type __pos, size_type __n, const basic_string& __str) const
1358 : {
1359 : _M_check(__pos, "basic_string::compare");
1360 : __n = _M_limit(__pos, __n);
1361 : const size_type __osize = __str.size();
1362 : const size_type __len = std::min(__n, __osize);
1363 : int __r = traits_type::compare(_M_data() + __pos, __str.data(), __len);
1364 : if (!__r)
1365 : __r = _S_compare(__n, __osize);
1366 : return __r;
1367 : }
1368 :
1369 : template<typename _CharT, typename _Traits, typename _Alloc>
1370 : int
1371 : basic_string<_CharT, _Traits, _Alloc>::
1372 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
1373 : size_type __pos2, size_type __n2) const
1374 : {
1375 : _M_check(__pos1, "basic_string::compare");
1376 : __str._M_check(__pos2, "basic_string::compare");
1377 : __n1 = _M_limit(__pos1, __n1);
1378 : __n2 = __str._M_limit(__pos2, __n2);
1379 : const size_type __len = std::min(__n1, __n2);
1380 : int __r = traits_type::compare(_M_data() + __pos1,
1381 : __str.data() + __pos2, __len);
1382 : if (!__r)
1383 : __r = _S_compare(__n1, __n2);
1384 : return __r;
1385 : }
1386 :
1387 : template<typename _CharT, typename _Traits, typename _Alloc>
1388 : int
1389 : basic_string<_CharT, _Traits, _Alloc>::
1390 : compare(const _CharT* __s) const
1391 : {
1392 : __glibcxx_requires_string(__s);
1393 : const size_type __size = this->size();
1394 : const size_type __osize = traits_type::length(__s);
1395 : const size_type __len = std::min(__size, __osize);
1396 : int __r = traits_type::compare(_M_data(), __s, __len);
1397 : if (!__r)
1398 : __r = _S_compare(__size, __osize);
1399 : return __r;
1400 : }
1401 :
1402 : template<typename _CharT, typename _Traits, typename _Alloc>
1403 : int
1404 : basic_string <_CharT, _Traits, _Alloc>::
1405 : compare(size_type __pos, size_type __n1, const _CharT* __s) const
1406 : {
1407 : __glibcxx_requires_string(__s);
1408 : _M_check(__pos, "basic_string::compare");
1409 : __n1 = _M_limit(__pos, __n1);
1410 : const size_type __osize = traits_type::length(__s);
1411 : const size_type __len = std::min(__n1, __osize);
1412 : int __r = traits_type::compare(_M_data() + __pos, __s, __len);
1413 : if (!__r)
1414 : __r = _S_compare(__n1, __osize);
1415 : return __r;
1416 : }
1417 :
1418 : template<typename _CharT, typename _Traits, typename _Alloc>
1419 : int
1420 : basic_string <_CharT, _Traits, _Alloc>::
1421 : compare(size_type __pos, size_type __n1, const _CharT* __s,
1422 : size_type __n2) const
1423 : {
1424 : __glibcxx_requires_string_len(__s, __n2);
1425 : _M_check(__pos, "basic_string::compare");
1426 : __n1 = _M_limit(__pos, __n1);
1427 : const size_type __len = std::min(__n1, __n2);
1428 : int __r = traits_type::compare(_M_data() + __pos, __s, __len);
1429 : if (!__r)
1430 : __r = _S_compare(__n1, __n2);
1431 : return __r;
1432 : }
1433 :
1434 : // 21.3.7.9 basic_string::getline and operators
1435 : template<typename _CharT, typename _Traits, typename _Alloc>
1436 : basic_istream<_CharT, _Traits>&
1437 : operator>>(basic_istream<_CharT, _Traits>& __in,
1438 : basic_string<_CharT, _Traits, _Alloc>& __str)
1439 : {
1440 : typedef basic_istream<_CharT, _Traits> __istream_type;
1441 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
1442 : typedef typename __istream_type::ios_base __ios_base;
1443 : typedef typename __istream_type::int_type __int_type;
1444 : typedef typename __string_type::size_type __size_type;
1445 : typedef ctype<_CharT> __ctype_type;
1446 : typedef typename __ctype_type::ctype_base __ctype_base;
1447 :
1448 : __size_type __extracted = 0;
1449 : typename __ios_base::iostate __err = __ios_base::goodbit;
1450 : typename __istream_type::sentry __cerb(__in, false);
1451 : if (__cerb)
1452 : {
1453 : __try
1454 : {
1455 : // Avoid reallocation for common case.
1456 : __str.erase();
1457 : _CharT __buf[128];
1458 : __size_type __len = 0;
1459 : const streamsize __w = __in.width();
1460 : const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
1461 : : __str.max_size();
1462 : const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
1463 : const __int_type __eof = _Traits::eof();
1464 : __int_type __c = __in.rdbuf()->sgetc();
1465 :
1466 : while (__extracted < __n
1467 : && !_Traits::eq_int_type(__c, __eof)
1468 : && !__ct.is(__ctype_base::space,
1469 : _Traits::to_char_type(__c)))
1470 : {
1471 : if (__len == sizeof(__buf) / sizeof(_CharT))
1472 : {
1473 : __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
1474 : __len = 0;
1475 : }
1476 : __buf[__len++] = _Traits::to_char_type(__c);
1477 : ++__extracted;
1478 : __c = __in.rdbuf()->snextc();
1479 : }
1480 : __str.append(__buf, __len);
1481 :
1482 : if (_Traits::eq_int_type(__c, __eof))
1483 : __err |= __ios_base::eofbit;
1484 : __in.width(0);
1485 : }
1486 : __catch(__cxxabiv1::__forced_unwind&)
1487 : {
1488 : __in._M_setstate(__ios_base::badbit);
1489 : __throw_exception_again;
1490 : }
1491 : __catch(...)
1492 : {
1493 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
1494 : // 91. Description of operator>> and getline() for string<>
1495 : // might cause endless loop
1496 : __in._M_setstate(__ios_base::badbit);
1497 : }
1498 : }
1499 : // 211. operator>>(istream&, string&) doesn't set failbit
1500 : if (!__extracted)
1501 : __err |= __ios_base::failbit;
1502 : if (__err)
1503 : __in.setstate(__err);
1504 : return __in;
1505 : }
1506 :
1507 : template<typename _CharT, typename _Traits, typename _Alloc>
1508 : basic_istream<_CharT, _Traits>&
1509 : getline(basic_istream<_CharT, _Traits>& __in,
1510 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
1511 : {
1512 : typedef basic_istream<_CharT, _Traits> __istream_type;
1513 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
1514 : typedef typename __istream_type::ios_base __ios_base;
1515 : typedef typename __istream_type::int_type __int_type;
1516 : typedef typename __string_type::size_type __size_type;
1517 :
1518 : __size_type __extracted = 0;
1519 : const __size_type __n = __str.max_size();
1520 : typename __ios_base::iostate __err = __ios_base::goodbit;
1521 : typename __istream_type::sentry __cerb(__in, true);
1522 : if (__cerb)
1523 : {
1524 : __try
1525 : {
1526 : __str.erase();
1527 : const __int_type __idelim = _Traits::to_int_type(__delim);
1528 : const __int_type __eof = _Traits::eof();
1529 : __int_type __c = __in.rdbuf()->sgetc();
1530 :
1531 : while (__extracted < __n
1532 : && !_Traits::eq_int_type(__c, __eof)
1533 : && !_Traits::eq_int_type(__c, __idelim))
1534 : {
1535 : __str += _Traits::to_char_type(__c);
1536 : ++__extracted;
1537 : __c = __in.rdbuf()->snextc();
1538 : }
1539 :
1540 : if (_Traits::eq_int_type(__c, __eof))
1541 : __err |= __ios_base::eofbit;
1542 : else if (_Traits::eq_int_type(__c, __idelim))
1543 : {
1544 : ++__extracted;
1545 : __in.rdbuf()->sbumpc();
1546 : }
1547 : else
1548 : __err |= __ios_base::failbit;
1549 : }
1550 : __catch(__cxxabiv1::__forced_unwind&)
1551 : {
1552 : __in._M_setstate(__ios_base::badbit);
1553 : __throw_exception_again;
1554 : }
1555 : __catch(...)
1556 : {
1557 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
1558 : // 91. Description of operator>> and getline() for string<>
1559 : // might cause endless loop
1560 : __in._M_setstate(__ios_base::badbit);
1561 : }
1562 : }
1563 : if (!__extracted)
1564 : __err |= __ios_base::failbit;
1565 : if (__err)
1566 : __in.setstate(__err);
1567 : return __in;
1568 : }
1569 :
1570 : // Inhibit implicit instantiations for required instantiations,
1571 : // which are defined via explicit instantiations elsewhere.
1572 : #if _GLIBCXX_EXTERN_TEMPLATE > 0
1573 : extern template class basic_string<char>;
1574 : extern template
1575 : basic_istream<char>&
1576 : operator>>(basic_istream<char>&, string&);
1577 : extern template
1578 : basic_ostream<char>&
1579 : operator<<(basic_ostream<char>&, const string&);
1580 : extern template
1581 : basic_istream<char>&
1582 : getline(basic_istream<char>&, string&, char);
1583 : extern template
1584 : basic_istream<char>&
1585 : getline(basic_istream<char>&, string&);
1586 :
1587 : #ifdef _GLIBCXX_USE_WCHAR_T
1588 : extern template class basic_string<wchar_t>;
1589 : extern template
1590 : basic_istream<wchar_t>&
1591 : operator>>(basic_istream<wchar_t>&, wstring&);
1592 : extern template
1593 : basic_ostream<wchar_t>&
1594 : operator<<(basic_ostream<wchar_t>&, const wstring&);
1595 : extern template
1596 : basic_istream<wchar_t>&
1597 : getline(basic_istream<wchar_t>&, wstring&, wchar_t);
1598 : extern template
1599 : basic_istream<wchar_t>&
1600 : getline(basic_istream<wchar_t>&, wstring&);
1601 : #endif
1602 : #endif
1603 :
1604 : _GLIBCXX_END_NAMESPACE_VERSION
1605 : } // namespace std
1606 :
1607 : #endif
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