1 // Versatile string -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 4 // Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 17 // Under Section 7 of GPL version 3, you are granted additional 18 // permissions described in the GCC Runtime Library Exception, version 19 // 3.1, as published by the Free Software Foundation. 20 21 // You should have received a copy of the GNU General Public License and 22 // a copy of the GCC Runtime Library Exception along with this program; 23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 // <http://www.gnu.org/licenses/>. 25 26 /** @file ext/vstring.tcc 27 * This is an internal header file, included by other library headers. 28 * Do not attempt to use it directly. @headername{ext/vstring.h} 29 */ 30 31 #ifndef _VSTRING_TCC 32 #define _VSTRING_TCC 1 33 34 #pragma GCC system_header 35 36 #include <bits/cxxabi_forced.h> 37 38 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 39 { 40 _GLIBCXX_BEGIN_NAMESPACE_VERSION 41 42 template<typename _CharT, typename _Traits, typename _Alloc, 43 template <typename, typename, typename> class _Base> 44 const typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 45 __versa_string<_CharT, _Traits, _Alloc, _Base>::npos; 46 47 template<typename _CharT, typename _Traits, typename _Alloc, 48 template <typename, typename, typename> class _Base> 49 void 50 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 51 resize(size_type __n, _CharT __c) 52 { 53 const size_type __size = this->size(); 54 if (__size < __n) 55 this->append(__n - __size, __c); 56 else if (__n < __size) 57 this->_M_erase(__n, __size - __n); 58 } 59 60 template<typename _CharT, typename _Traits, typename _Alloc, 61 template <typename, typename, typename> class _Base> 62 __versa_string<_CharT, _Traits, _Alloc, _Base>& 63 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 64 _M_append(const _CharT* __s, size_type __n) 65 { 66 const size_type __len = __n + this->size(); 67 68 if (__len <= this->capacity() && !this->_M_is_shared()) 69 { 70 if (__n) 71 this->_S_copy(this->_M_data() + this->size(), __s, __n); 72 } 73 else 74 this->_M_mutate(this->size(), size_type(0), __s, __n); 75 76 this->_M_set_length(__len); 77 return *this; 78 } 79 80 template<typename _CharT, typename _Traits, typename _Alloc, 81 template <typename, typename, typename> class _Base> 82 template<typename _InputIterator> 83 __versa_string<_CharT, _Traits, _Alloc, _Base>& 84 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 85 _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1, 86 _InputIterator __k2, std::__false_type) 87 { 88 const __versa_string __s(__k1, __k2); 89 const size_type __n1 = __i2 - __i1; 90 return _M_replace(__i1 - _M_ibegin(), __n1, __s._M_data(), 91 __s.size()); 92 } 93 94 template<typename _CharT, typename _Traits, typename _Alloc, 95 template <typename, typename, typename> class _Base> 96 __versa_string<_CharT, _Traits, _Alloc, _Base>& 97 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 98 _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2, 99 _CharT __c) 100 { 101 _M_check_length(__n1, __n2, "__versa_string::_M_replace_aux"); 102 103 const size_type __old_size = this->size(); 104 const size_type __new_size = __old_size + __n2 - __n1; 105 106 if (__new_size <= this->capacity() && !this->_M_is_shared()) 107 { 108 _CharT* __p = this->_M_data() + __pos1; 109 110 const size_type __how_much = __old_size - __pos1 - __n1; 111 if (__how_much && __n1 != __n2) 112 this->_S_move(__p + __n2, __p + __n1, __how_much); 113 } 114 else 115 this->_M_mutate(__pos1, __n1, 0, __n2); 116 117 if (__n2) 118 this->_S_assign(this->_M_data() + __pos1, __n2, __c); 119 120 this->_M_set_length(__new_size); 121 return *this; 122 } 123 124 template<typename _CharT, typename _Traits, typename _Alloc, 125 template <typename, typename, typename> class _Base> 126 __versa_string<_CharT, _Traits, _Alloc, _Base>& 127 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 128 _M_replace(size_type __pos, size_type __len1, const _CharT* __s, 129 const size_type __len2) 130 { 131 _M_check_length(__len1, __len2, "__versa_string::_M_replace"); 132 133 const size_type __old_size = this->size(); 134 const size_type __new_size = __old_size + __len2 - __len1; 135 136 if (__new_size <= this->capacity() && !this->_M_is_shared()) 137 { 138 _CharT* __p = this->_M_data() + __pos; 139 140 const size_type __how_much = __old_size - __pos - __len1; 141 if (_M_disjunct(__s)) 142 { 143 if (__how_much && __len1 != __len2) 144 this->_S_move(__p + __len2, __p + __len1, __how_much); 145 if (__len2) 146 this->_S_copy(__p, __s, __len2); 147 } 148 else 149 { 150 // Work in-place. 151 if (__len2 && __len2 <= __len1) 152 this->_S_move(__p, __s, __len2); 153 if (__how_much && __len1 != __len2) 154 this->_S_move(__p + __len2, __p + __len1, __how_much); 155 if (__len2 > __len1) 156 { 157 if (__s + __len2 <= __p + __len1) 158 this->_S_move(__p, __s, __len2); 159 else if (__s >= __p + __len1) 160 this->_S_copy(__p, __s + __len2 - __len1, __len2); 161 else 162 { 163 const size_type __nleft = (__p + __len1) - __s; 164 this->_S_move(__p, __s, __nleft); 165 this->_S_copy(__p + __nleft, __p + __len2, 166 __len2 - __nleft); 167 } 168 } 169 } 170 } 171 else 172 this->_M_mutate(__pos, __len1, __s, __len2); 173 174 this->_M_set_length(__new_size); 175 return *this; 176 } 177 178 template<typename _CharT, typename _Traits, typename _Alloc, 179 template <typename, typename, typename> class _Base> 180 __versa_string<_CharT, _Traits, _Alloc, _Base> 181 operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs, 182 const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs) 183 { 184 __versa_string<_CharT, _Traits, _Alloc, _Base> __str; 185 __str.reserve(__lhs.size() + __rhs.size()); 186 __str.append(__lhs); 187 __str.append(__rhs); 188 return __str; 189 } 190 191 template<typename _CharT, typename _Traits, typename _Alloc, 192 template <typename, typename, typename> class _Base> 193 __versa_string<_CharT, _Traits, _Alloc, _Base> 194 operator+(const _CharT* __lhs, 195 const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs) 196 { 197 __glibcxx_requires_string(__lhs); 198 typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type; 199 typedef typename __string_type::size_type __size_type; 200 const __size_type __len = _Traits::length(__lhs); 201 __string_type __str; 202 __str.reserve(__len + __rhs.size()); 203 __str.append(__lhs, __len); 204 __str.append(__rhs); 205 return __str; 206 } 207 208 template<typename _CharT, typename _Traits, typename _Alloc, 209 template <typename, typename, typename> class _Base> 210 __versa_string<_CharT, _Traits, _Alloc, _Base> 211 operator+(_CharT __lhs, 212 const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs) 213 { 214 __versa_string<_CharT, _Traits, _Alloc, _Base> __str; 215 __str.reserve(__rhs.size() + 1); 216 __str.push_back(__lhs); 217 __str.append(__rhs); 218 return __str; 219 } 220 221 template<typename _CharT, typename _Traits, typename _Alloc, 222 template <typename, typename, typename> class _Base> 223 __versa_string<_CharT, _Traits, _Alloc, _Base> 224 operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs, 225 const _CharT* __rhs) 226 { 227 __glibcxx_requires_string(__rhs); 228 typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type; 229 typedef typename __string_type::size_type __size_type; 230 const __size_type __len = _Traits::length(__rhs); 231 __string_type __str; 232 __str.reserve(__lhs.size() + __len); 233 __str.append(__lhs); 234 __str.append(__rhs, __len); 235 return __str; 236 } 237 238 template<typename _CharT, typename _Traits, typename _Alloc, 239 template <typename, typename, typename> class _Base> 240 __versa_string<_CharT, _Traits, _Alloc, _Base> 241 operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs, 242 _CharT __rhs) 243 { 244 __versa_string<_CharT, _Traits, _Alloc, _Base> __str; 245 __str.reserve(__lhs.size() + 1); 246 __str.append(__lhs); 247 __str.push_back(__rhs); 248 return __str; 249 } 250 251 template<typename _CharT, typename _Traits, typename _Alloc, 252 template <typename, typename, typename> class _Base> 253 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 254 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 255 copy(_CharT* __s, size_type __n, size_type __pos) const 256 { 257 _M_check(__pos, "__versa_string::copy"); 258 __n = _M_limit(__pos, __n); 259 __glibcxx_requires_string_len(__s, __n); 260 if (__n) 261 this->_S_copy(__s, this->_M_data() + __pos, __n); 262 // 21.3.5.7 par 3: do not append null. (good.) 263 return __n; 264 } 265 266 template<typename _CharT, typename _Traits, typename _Alloc, 267 template <typename, typename, typename> class _Base> 268 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 269 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 270 find(const _CharT* __s, size_type __pos, size_type __n) const 271 { 272 __glibcxx_requires_string_len(__s, __n); 273 const size_type __size = this->size(); 274 const _CharT* __data = this->_M_data(); 275 276 if (__n == 0) 277 return __pos <= __size ? __pos : npos; 278 279 if (__n <= __size) 280 { 281 for (; __pos <= __size - __n; ++__pos) 282 if (traits_type::eq(__data[__pos], __s[0]) 283 && traits_type::compare(__data + __pos + 1, 284 __s + 1, __n - 1) == 0) 285 return __pos; 286 } 287 return npos; 288 } 289 290 template<typename _CharT, typename _Traits, typename _Alloc, 291 template <typename, typename, typename> class _Base> 292 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 293 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 294 find(_CharT __c, size_type __pos) const 295 { 296 size_type __ret = npos; 297 const size_type __size = this->size(); 298 if (__pos < __size) 299 { 300 const _CharT* __data = this->_M_data(); 301 const size_type __n = __size - __pos; 302 const _CharT* __p = traits_type::find(__data + __pos, __n, __c); 303 if (__p) 304 __ret = __p - __data; 305 } 306 return __ret; 307 } 308 309 template<typename _CharT, typename _Traits, typename _Alloc, 310 template <typename, typename, typename> class _Base> 311 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 312 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 313 rfind(const _CharT* __s, size_type __pos, size_type __n) const 314 { 315 __glibcxx_requires_string_len(__s, __n); 316 const size_type __size = this->size(); 317 if (__n <= __size) 318 { 319 __pos = std::min(size_type(__size - __n), __pos); 320 const _CharT* __data = this->_M_data(); 321 do 322 { 323 if (traits_type::compare(__data + __pos, __s, __n) == 0) 324 return __pos; 325 } 326 while (__pos-- > 0); 327 } 328 return npos; 329 } 330 331 template<typename _CharT, typename _Traits, typename _Alloc, 332 template <typename, typename, typename> class _Base> 333 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 334 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 335 rfind(_CharT __c, size_type __pos) const 336 { 337 size_type __size = this->size(); 338 if (__size) 339 { 340 if (--__size > __pos) 341 __size = __pos; 342 for (++__size; __size-- > 0; ) 343 if (traits_type::eq(this->_M_data()[__size], __c)) 344 return __size; 345 } 346 return npos; 347 } 348 349 template<typename _CharT, typename _Traits, typename _Alloc, 350 template <typename, typename, typename> class _Base> 351 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 352 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 353 find_first_of(const _CharT* __s, size_type __pos, size_type __n) const 354 { 355 __glibcxx_requires_string_len(__s, __n); 356 for (; __n && __pos < this->size(); ++__pos) 357 { 358 const _CharT* __p = traits_type::find(__s, __n, 359 this->_M_data()[__pos]); 360 if (__p) 361 return __pos; 362 } 363 return npos; 364 } 365 366 template<typename _CharT, typename _Traits, typename _Alloc, 367 template <typename, typename, typename> class _Base> 368 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 369 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 370 find_last_of(const _CharT* __s, size_type __pos, size_type __n) const 371 { 372 __glibcxx_requires_string_len(__s, __n); 373 size_type __size = this->size(); 374 if (__size && __n) 375 { 376 if (--__size > __pos) 377 __size = __pos; 378 do 379 { 380 if (traits_type::find(__s, __n, this->_M_data()[__size])) 381 return __size; 382 } 383 while (__size-- != 0); 384 } 385 return npos; 386 } 387 388 template<typename _CharT, typename _Traits, typename _Alloc, 389 template <typename, typename, typename> class _Base> 390 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 391 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 392 find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const 393 { 394 __glibcxx_requires_string_len(__s, __n); 395 for (; __pos < this->size(); ++__pos) 396 if (!traits_type::find(__s, __n, this->_M_data()[__pos])) 397 return __pos; 398 return npos; 399 } 400 401 template<typename _CharT, typename _Traits, typename _Alloc, 402 template <typename, typename, typename> class _Base> 403 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 404 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 405 find_first_not_of(_CharT __c, size_type __pos) const 406 { 407 for (; __pos < this->size(); ++__pos) 408 if (!traits_type::eq(this->_M_data()[__pos], __c)) 409 return __pos; 410 return npos; 411 } 412 413 template<typename _CharT, typename _Traits, typename _Alloc, 414 template <typename, typename, typename> class _Base> 415 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 416 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 417 find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const 418 { 419 __glibcxx_requires_string_len(__s, __n); 420 size_type __size = this->size(); 421 if (__size) 422 { 423 if (--__size > __pos) 424 __size = __pos; 425 do 426 { 427 if (!traits_type::find(__s, __n, this->_M_data()[__size])) 428 return __size; 429 } 430 while (__size--); 431 } 432 return npos; 433 } 434 435 template<typename _CharT, typename _Traits, typename _Alloc, 436 template <typename, typename, typename> class _Base> 437 typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type 438 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 439 find_last_not_of(_CharT __c, size_type __pos) const 440 { 441 size_type __size = this->size(); 442 if (__size) 443 { 444 if (--__size > __pos) 445 __size = __pos; 446 do 447 { 448 if (!traits_type::eq(this->_M_data()[__size], __c)) 449 return __size; 450 } 451 while (__size--); 452 } 453 return npos; 454 } 455 456 template<typename _CharT, typename _Traits, typename _Alloc, 457 template <typename, typename, typename> class _Base> 458 int 459 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 460 compare(size_type __pos, size_type __n, const __versa_string& __str) const 461 { 462 _M_check(__pos, "__versa_string::compare"); 463 __n = _M_limit(__pos, __n); 464 const size_type __osize = __str.size(); 465 const size_type __len = std::min(__n, __osize); 466 int __r = traits_type::compare(this->_M_data() + __pos, 467 __str.data(), __len); 468 if (!__r) 469 __r = this->_S_compare(__n, __osize); 470 return __r; 471 } 472 473 template<typename _CharT, typename _Traits, typename _Alloc, 474 template <typename, typename, typename> class _Base> 475 int 476 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 477 compare(size_type __pos1, size_type __n1, const __versa_string& __str, 478 size_type __pos2, size_type __n2) const 479 { 480 _M_check(__pos1, "__versa_string::compare"); 481 __str._M_check(__pos2, "__versa_string::compare"); 482 __n1 = _M_limit(__pos1, __n1); 483 __n2 = __str._M_limit(__pos2, __n2); 484 const size_type __len = std::min(__n1, __n2); 485 int __r = traits_type::compare(this->_M_data() + __pos1, 486 __str.data() + __pos2, __len); 487 if (!__r) 488 __r = this->_S_compare(__n1, __n2); 489 return __r; 490 } 491 492 template<typename _CharT, typename _Traits, typename _Alloc, 493 template <typename, typename, typename> class _Base> 494 int 495 __versa_string<_CharT, _Traits, _Alloc, _Base>:: 496 compare(const _CharT* __s) const 497 { 498 __glibcxx_requires_string(__s); 499 const size_type __size = this->size(); 500 const size_type __osize = traits_type::length(__s); 501 const size_type __len = std::min(__size, __osize); 502 int __r = traits_type::compare(this->_M_data(), __s, __len); 503 if (!__r) 504 __r = this->_S_compare(__size, __osize); 505 return __r; 506 } 507 508 template<typename _CharT, typename _Traits, typename _Alloc, 509 template <typename, typename, typename> class _Base> 510 int 511 __versa_string <_CharT, _Traits, _Alloc, _Base>:: 512 compare(size_type __pos, size_type __n1, const _CharT* __s) const 513 { 514 __glibcxx_requires_string(__s); 515 _M_check(__pos, "__versa_string::compare"); 516 __n1 = _M_limit(__pos, __n1); 517 const size_type __osize = traits_type::length(__s); 518 const size_type __len = std::min(__n1, __osize); 519 int __r = traits_type::compare(this->_M_data() + __pos, __s, __len); 520 if (!__r) 521 __r = this->_S_compare(__n1, __osize); 522 return __r; 523 } 524 525 template<typename _CharT, typename _Traits, typename _Alloc, 526 template <typename, typename, typename> class _Base> 527 int 528 __versa_string <_CharT, _Traits, _Alloc, _Base>:: 529 compare(size_type __pos, size_type __n1, const _CharT* __s, 530 size_type __n2) const 531 { 532 __glibcxx_requires_string_len(__s, __n2); 533 _M_check(__pos, "__versa_string::compare"); 534 __n1 = _M_limit(__pos, __n1); 535 const size_type __len = std::min(__n1, __n2); 536 int __r = traits_type::compare(this->_M_data() + __pos, __s, __len); 537 if (!__r) 538 __r = this->_S_compare(__n1, __n2); 539 return __r; 540 } 541 542 _GLIBCXX_END_NAMESPACE_VERSION 543 } // namespace 544 545 namespace std _GLIBCXX_VISIBILITY(default) 546 { 547 _GLIBCXX_BEGIN_NAMESPACE_VERSION 548 549 template<typename _CharT, typename _Traits, typename _Alloc, 550 template <typename, typename, typename> class _Base> 551 basic_istream<_CharT, _Traits>& 552 operator>>(basic_istream<_CharT, _Traits>& __in, 553 __gnu_cxx::__versa_string<_CharT, _Traits, 554 _Alloc, _Base>& __str) 555 { 556 typedef basic_istream<_CharT, _Traits> __istream_type; 557 typedef typename __istream_type::ios_base __ios_base; 558 typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base> 559 __string_type; 560 typedef typename __istream_type::int_type __int_type; 561 typedef typename __string_type::size_type __size_type; 562 typedef ctype<_CharT> __ctype_type; 563 typedef typename __ctype_type::ctype_base __ctype_base; 564 565 __size_type __extracted = 0; 566 typename __ios_base::iostate __err = __ios_base::goodbit; 567 typename __istream_type::sentry __cerb(__in, false); 568 if (__cerb) 569 { 570 __try 571 { 572 // Avoid reallocation for common case. 573 __str.erase(); 574 _CharT __buf[128]; 575 __size_type __len = 0; 576 const streamsize __w = __in.width(); 577 const __size_type __n = __w > 0 ? static_cast<__size_type>(__w) 578 : __str.max_size(); 579 const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); 580 const __int_type __eof = _Traits::eof(); 581 __int_type __c = __in.rdbuf()->sgetc(); 582 583 while (__extracted < __n 584 && !_Traits::eq_int_type(__c, __eof) 585 && !__ct.is(__ctype_base::space, 586 _Traits::to_char_type(__c))) 587 { 588 if (__len == sizeof(__buf) / sizeof(_CharT)) 589 { 590 __str.append(__buf, sizeof(__buf) / sizeof(_CharT)); 591 __len = 0; 592 } 593 __buf[__len++] = _Traits::to_char_type(__c); 594 ++__extracted; 595 __c = __in.rdbuf()->snextc(); 596 } 597 __str.append(__buf, __len); 598 599 if (_Traits::eq_int_type(__c, __eof)) 600 __err |= __ios_base::eofbit; 601 __in.width(0); 602 } 603 __catch(__cxxabiv1::__forced_unwind&) 604 { 605 __in._M_setstate(__ios_base::badbit); 606 __throw_exception_again; 607 } 608 __catch(...) 609 { 610 // _GLIBCXX_RESOLVE_LIB_DEFECTS 611 // 91. Description of operator>> and getline() for string<> 612 // might cause endless loop 613 __in._M_setstate(__ios_base::badbit); 614 } 615 } 616 // 211. operator>>(istream&, string&) doesn't set failbit 617 if (!__extracted) 618 __err |= __ios_base::failbit; 619 if (__err) 620 __in.setstate(__err); 621 return __in; 622 } 623 624 template<typename _CharT, typename _Traits, typename _Alloc, 625 template <typename, typename, typename> class _Base> 626 basic_istream<_CharT, _Traits>& 627 getline(basic_istream<_CharT, _Traits>& __in, 628 __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str, 629 _CharT __delim) 630 { 631 typedef basic_istream<_CharT, _Traits> __istream_type; 632 typedef typename __istream_type::ios_base __ios_base; 633 typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base> 634 __string_type; 635 typedef typename __istream_type::int_type __int_type; 636 typedef typename __string_type::size_type __size_type; 637 638 __size_type __extracted = 0; 639 const __size_type __n = __str.max_size(); 640 typename __ios_base::iostate __err = __ios_base::goodbit; 641 typename __istream_type::sentry __cerb(__in, true); 642 if (__cerb) 643 { 644 __try 645 { 646 // Avoid reallocation for common case. 647 __str.erase(); 648 _CharT __buf[128]; 649 __size_type __len = 0; 650 const __int_type __idelim = _Traits::to_int_type(__delim); 651 const __int_type __eof = _Traits::eof(); 652 __int_type __c = __in.rdbuf()->sgetc(); 653 654 while (__extracted < __n 655 && !_Traits::eq_int_type(__c, __eof) 656 && !_Traits::eq_int_type(__c, __idelim)) 657 { 658 if (__len == sizeof(__buf) / sizeof(_CharT)) 659 { 660 __str.append(__buf, sizeof(__buf) / sizeof(_CharT)); 661 __len = 0; 662 } 663 __buf[__len++] = _Traits::to_char_type(__c); 664 ++__extracted; 665 __c = __in.rdbuf()->snextc(); 666 } 667 __str.append(__buf, __len); 668 669 if (_Traits::eq_int_type(__c, __eof)) 670 __err |= __ios_base::eofbit; 671 else if (_Traits::eq_int_type(__c, __idelim)) 672 { 673 ++__extracted; 674 __in.rdbuf()->sbumpc(); 675 } 676 else 677 __err |= __ios_base::failbit; 678 } 679 __catch(__cxxabiv1::__forced_unwind&) 680 { 681 __in._M_setstate(__ios_base::badbit); 682 __throw_exception_again; 683 } 684 __catch(...) 685 { 686 // _GLIBCXX_RESOLVE_LIB_DEFECTS 687 // 91. Description of operator>> and getline() for string<> 688 // might cause endless loop 689 __in._M_setstate(__ios_base::badbit); 690 } 691 } 692 if (!__extracted) 693 __err |= __ios_base::failbit; 694 if (__err) 695 __in.setstate(__err); 696 return __in; 697 } 698 699 _GLIBCXX_END_NAMESPACE_VERSION 700 } // namespace 701 702 #endif // _VSTRING_TCC 703
