1 // Hashing map implementation -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2004, 2005, 2006, 2009, 2010 4 // Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 17 // Under Section 7 of GPL version 3, you are granted additional 18 // permissions described in the GCC Runtime Library Exception, version 19 // 3.1, as published by the Free Software Foundation. 20 21 // You should have received a copy of the GNU General Public License and 22 // a copy of the GCC Runtime Library Exception along with this program; 23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 // <http://www.gnu.org/licenses/>. 25 26 /* 27 * Copyright (c) 1996 28 * Silicon Graphics Computer Systems, Inc. 29 * 30 * Permission to use, copy, modify, distribute and sell this software 31 * and its documentation for any purpose is hereby granted without fee, 32 * provided that the above copyright notice appear in all copies and 33 * that both that copyright notice and this permission notice appear 34 * in supporting documentation. Silicon Graphics makes no 35 * representations about the suitability of this software for any 36 * purpose. It is provided "as is" without express or implied warranty. 37 * 38 * 39 * Copyright (c) 1994 40 * Hewlett-Packard Company 41 * 42 * Permission to use, copy, modify, distribute and sell this software 43 * and its documentation for any purpose is hereby granted without fee, 44 * provided that the above copyright notice appear in all copies and 45 * that both that copyright notice and this permission notice appear 46 * in supporting documentation. Hewlett-Packard Company makes no 47 * representations about the suitability of this software for any 48 * purpose. It is provided "as is" without express or implied warranty. 49 * 50 */ 51 52 /** @file backward/hash_map 53 * This file is a GNU extension to the Standard C++ Library (possibly 54 * containing extensions from the HP/SGI STL subset). 55 */ 56 57 #ifndef _BACKWARD_HASH_MAP 58 #define _BACKWARD_HASH_MAP 1 59 60 #ifndef _GLIBCXX_PERMIT_BACKWARD_HASH 61 #include "backward_warning.h" 62 #endif 63 64 #include <bits/c++config.h> 65 #include <backward/hashtable.h> 66 #include <bits/concept_check.h> 67 68 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 69 { 70 _GLIBCXX_BEGIN_NAMESPACE_VERSION 71 72 using std::equal_to; 73 using std::allocator; 74 using std::pair; 75 using std::_Select1st; 76 77 /** 78 * This is an SGI extension. 79 * @ingroup SGIextensions 80 * @doctodo 81 */ 82 template<class _Key, class _Tp, class _HashFn = hash<_Key>, 83 class _EqualKey = equal_to<_Key>, class _Alloc = allocator<_Tp> > 84 class hash_map 85 { 86 private: 87 typedef hashtable<pair<const _Key, _Tp>,_Key, _HashFn, 88 _Select1st<pair<const _Key, _Tp> >, 89 _EqualKey, _Alloc> _Ht; 90 91 _Ht _M_ht; 92 93 public: 94 typedef typename _Ht::key_type key_type; 95 typedef _Tp data_type; 96 typedef _Tp mapped_type; 97 typedef typename _Ht::value_type value_type; 98 typedef typename _Ht::hasher hasher; 99 typedef typename _Ht::key_equal key_equal; 100 101 typedef typename _Ht::size_type size_type; 102 typedef typename _Ht::difference_type difference_type; 103 typedef typename _Ht::pointer pointer; 104 typedef typename _Ht::const_pointer const_pointer; 105 typedef typename _Ht::reference reference; 106 typedef typename _Ht::const_reference const_reference; 107 108 typedef typename _Ht::iterator iterator; 109 typedef typename _Ht::const_iterator const_iterator; 110 111 typedef typename _Ht::allocator_type allocator_type; 112 113 hasher 114 hash_funct() const 115 { return _M_ht.hash_funct(); } 116 117 key_equal 118 key_eq() const 119 { return _M_ht.key_eq(); } 120 121 allocator_type 122 get_allocator() const 123 { return _M_ht.get_allocator(); } 124 125 hash_map() 126 : _M_ht(100, hasher(), key_equal(), allocator_type()) {} 127 128 explicit 129 hash_map(size_type __n) 130 : _M_ht(__n, hasher(), key_equal(), allocator_type()) {} 131 132 hash_map(size_type __n, const hasher& __hf) 133 : _M_ht(__n, __hf, key_equal(), allocator_type()) {} 134 135 hash_map(size_type __n, const hasher& __hf, const key_equal& __eql, 136 const allocator_type& __a = allocator_type()) 137 : _M_ht(__n, __hf, __eql, __a) {} 138 139 template<class _InputIterator> 140 hash_map(_InputIterator __f, _InputIterator __l) 141 : _M_ht(100, hasher(), key_equal(), allocator_type()) 142 { _M_ht.insert_unique(__f, __l); } 143 144 template<class _InputIterator> 145 hash_map(_InputIterator __f, _InputIterator __l, size_type __n) 146 : _M_ht(__n, hasher(), key_equal(), allocator_type()) 147 { _M_ht.insert_unique(__f, __l); } 148 149 template<class _InputIterator> 150 hash_map(_InputIterator __f, _InputIterator __l, size_type __n, 151 const hasher& __hf) 152 : _M_ht(__n, __hf, key_equal(), allocator_type()) 153 { _M_ht.insert_unique(__f, __l); } 154 155 template<class _InputIterator> 156 hash_map(_InputIterator __f, _InputIterator __l, size_type __n, 157 const hasher& __hf, const key_equal& __eql, 158 const allocator_type& __a = allocator_type()) 159 : _M_ht(__n, __hf, __eql, __a) 160 { _M_ht.insert_unique(__f, __l); } 161 162 size_type 163 size() const 164 { return _M_ht.size(); } 165 166 size_type 167 max_size() const 168 { return _M_ht.max_size(); } 169 170 bool 171 empty() const 172 { return _M_ht.empty(); } 173 174 void 175 swap(hash_map& __hs) 176 { _M_ht.swap(__hs._M_ht); } 177 178 template<class _K1, class _T1, class _HF, class _EqK, class _Al> 179 friend bool 180 operator== (const hash_map<_K1, _T1, _HF, _EqK, _Al>&, 181 const hash_map<_K1, _T1, _HF, _EqK, _Al>&); 182 183 iterator 184 begin() 185 { return _M_ht.begin(); } 186 187 iterator 188 end() 189 { return _M_ht.end(); } 190 191 const_iterator 192 begin() const 193 { return _M_ht.begin(); } 194 195 const_iterator 196 end() const 197 { return _M_ht.end(); } 198 199 pair<iterator, bool> 200 insert(const value_type& __obj) 201 { return _M_ht.insert_unique(__obj); } 202 203 template<class _InputIterator> 204 void 205 insert(_InputIterator __f, _InputIterator __l) 206 { _M_ht.insert_unique(__f, __l); } 207 208 pair<iterator, bool> 209 insert_noresize(const value_type& __obj) 210 { return _M_ht.insert_unique_noresize(__obj); } 211 212 iterator 213 find(const key_type& __key) 214 { return _M_ht.find(__key); } 215 216 const_iterator 217 find(const key_type& __key) const 218 { return _M_ht.find(__key); } 219 220 _Tp& 221 operator[](const key_type& __key) 222 { return _M_ht.find_or_insert(value_type(__key, _Tp())).second; } 223 224 size_type 225 count(const key_type& __key) const 226 { return _M_ht.count(__key); } 227 228 pair<iterator, iterator> 229 equal_range(const key_type& __key) 230 { return _M_ht.equal_range(__key); } 231 232 pair<const_iterator, const_iterator> 233 equal_range(const key_type& __key) const 234 { return _M_ht.equal_range(__key); } 235 236 size_type 237 erase(const key_type& __key) 238 {return _M_ht.erase(__key); } 239 240 void 241 erase(iterator __it) 242 { _M_ht.erase(__it); } 243 244 void 245 erase(iterator __f, iterator __l) 246 { _M_ht.erase(__f, __l); } 247 248 void 249 clear() 250 { _M_ht.clear(); } 251 252 void 253 resize(size_type __hint) 254 { _M_ht.resize(__hint); } 255 256 size_type 257 bucket_count() const 258 { return _M_ht.bucket_count(); } 259 260 size_type 261 max_bucket_count() const 262 { return _M_ht.max_bucket_count(); } 263 264 size_type 265 elems_in_bucket(size_type __n) const 266 { return _M_ht.elems_in_bucket(__n); } 267 }; 268 269 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc> 270 inline bool 271 operator==(const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1, 272 const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2) 273 { return __hm1._M_ht == __hm2._M_ht; } 274 275 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc> 276 inline bool 277 operator!=(const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1, 278 const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2) 279 { return !(__hm1 == __hm2); } 280 281 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc> 282 inline void 283 swap(hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1, 284 hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2) 285 { __hm1.swap(__hm2); } 286 287 288 /** 289 * This is an SGI extension. 290 * @ingroup SGIextensions 291 * @doctodo 292 */ 293 template<class _Key, class _Tp, 294 class _HashFn = hash<_Key>, 295 class _EqualKey = equal_to<_Key>, 296 class _Alloc = allocator<_Tp> > 297 class hash_multimap 298 { 299 // concept requirements 300 __glibcxx_class_requires(_Key, _SGIAssignableConcept) 301 __glibcxx_class_requires(_Tp, _SGIAssignableConcept) 302 __glibcxx_class_requires3(_HashFn, size_t, _Key, _UnaryFunctionConcept) 303 __glibcxx_class_requires3(_EqualKey, _Key, _Key, _BinaryPredicateConcept) 304 305 private: 306 typedef hashtable<pair<const _Key, _Tp>, _Key, _HashFn, 307 _Select1st<pair<const _Key, _Tp> >, _EqualKey, _Alloc> 308 _Ht; 309 310 _Ht _M_ht; 311 312 public: 313 typedef typename _Ht::key_type key_type; 314 typedef _Tp data_type; 315 typedef _Tp mapped_type; 316 typedef typename _Ht::value_type value_type; 317 typedef typename _Ht::hasher hasher; 318 typedef typename _Ht::key_equal key_equal; 319 320 typedef typename _Ht::size_type size_type; 321 typedef typename _Ht::difference_type difference_type; 322 typedef typename _Ht::pointer pointer; 323 typedef typename _Ht::const_pointer const_pointer; 324 typedef typename _Ht::reference reference; 325 typedef typename _Ht::const_reference const_reference; 326 327 typedef typename _Ht::iterator iterator; 328 typedef typename _Ht::const_iterator const_iterator; 329 330 typedef typename _Ht::allocator_type allocator_type; 331 332 hasher 333 hash_funct() const 334 { return _M_ht.hash_funct(); } 335 336 key_equal 337 key_eq() const 338 { return _M_ht.key_eq(); } 339 340 allocator_type 341 get_allocator() const 342 { return _M_ht.get_allocator(); } 343 344 hash_multimap() 345 : _M_ht(100, hasher(), key_equal(), allocator_type()) {} 346 347 explicit 348 hash_multimap(size_type __n) 349 : _M_ht(__n, hasher(), key_equal(), allocator_type()) {} 350 351 hash_multimap(size_type __n, const hasher& __hf) 352 : _M_ht(__n, __hf, key_equal(), allocator_type()) {} 353 354 hash_multimap(size_type __n, const hasher& __hf, const key_equal& __eql, 355 const allocator_type& __a = allocator_type()) 356 : _M_ht(__n, __hf, __eql, __a) {} 357 358 template<class _InputIterator> 359 hash_multimap(_InputIterator __f, _InputIterator __l) 360 : _M_ht(100, hasher(), key_equal(), allocator_type()) 361 { _M_ht.insert_equal(__f, __l); } 362 363 template<class _InputIterator> 364 hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n) 365 : _M_ht(__n, hasher(), key_equal(), allocator_type()) 366 { _M_ht.insert_equal(__f, __l); } 367 368 template<class _InputIterator> 369 hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n, 370 const hasher& __hf) 371 : _M_ht(__n, __hf, key_equal(), allocator_type()) 372 { _M_ht.insert_equal(__f, __l); } 373 374 template<class _InputIterator> 375 hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n, 376 const hasher& __hf, const key_equal& __eql, 377 const allocator_type& __a = allocator_type()) 378 : _M_ht(__n, __hf, __eql, __a) 379 { _M_ht.insert_equal(__f, __l); } 380 381 size_type 382 size() const 383 { return _M_ht.size(); } 384 385 size_type 386 max_size() const 387 { return _M_ht.max_size(); } 388 389 bool 390 empty() const 391 { return _M_ht.empty(); } 392 393 void 394 swap(hash_multimap& __hs) 395 { _M_ht.swap(__hs._M_ht); } 396 397 template<class _K1, class _T1, class _HF, class _EqK, class _Al> 398 friend bool 399 operator==(const hash_multimap<_K1, _T1, _HF, _EqK, _Al>&, 400 const hash_multimap<_K1, _T1, _HF, _EqK, _Al>&); 401 402 iterator 403 begin() 404 { return _M_ht.begin(); } 405 406 iterator 407 end() 408 { return _M_ht.end(); } 409 410 const_iterator 411 begin() const 412 { return _M_ht.begin(); } 413 414 const_iterator 415 end() const 416 { return _M_ht.end(); } 417 418 iterator 419 insert(const value_type& __obj) 420 { return _M_ht.insert_equal(__obj); } 421 422 template<class _InputIterator> 423 void 424 insert(_InputIterator __f, _InputIterator __l) 425 { _M_ht.insert_equal(__f,__l); } 426 427 iterator 428 insert_noresize(const value_type& __obj) 429 { return _M_ht.insert_equal_noresize(__obj); } 430 431 iterator 432 find(const key_type& __key) 433 { return _M_ht.find(__key); } 434 435 const_iterator 436 find(const key_type& __key) const 437 { return _M_ht.find(__key); } 438 439 size_type 440 count(const key_type& __key) const 441 { return _M_ht.count(__key); } 442 443 pair<iterator, iterator> 444 equal_range(const key_type& __key) 445 { return _M_ht.equal_range(__key); } 446 447 pair<const_iterator, const_iterator> 448 equal_range(const key_type& __key) const 449 { return _M_ht.equal_range(__key); } 450 451 size_type 452 erase(const key_type& __key) 453 { return _M_ht.erase(__key); } 454 455 void 456 erase(iterator __it) 457 { _M_ht.erase(__it); } 458 459 void 460 erase(iterator __f, iterator __l) 461 { _M_ht.erase(__f, __l); } 462 463 void 464 clear() 465 { _M_ht.clear(); } 466 467 void 468 resize(size_type __hint) 469 { _M_ht.resize(__hint); } 470 471 size_type 472 bucket_count() const 473 { return _M_ht.bucket_count(); } 474 475 size_type 476 max_bucket_count() const 477 { return _M_ht.max_bucket_count(); } 478 479 size_type 480 elems_in_bucket(size_type __n) const 481 { return _M_ht.elems_in_bucket(__n); } 482 }; 483 484 template<class _Key, class _Tp, class _HF, class _EqKey, class _Alloc> 485 inline bool 486 operator==(const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1, 487 const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2) 488 { return __hm1._M_ht == __hm2._M_ht; } 489 490 template<class _Key, class _Tp, class _HF, class _EqKey, class _Alloc> 491 inline bool 492 operator!=(const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1, 493 const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2) 494 { return !(__hm1 == __hm2); } 495 496 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc> 497 inline void 498 swap(hash_multimap<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1, 499 hash_multimap<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2) 500 { __hm1.swap(__hm2); } 501 502 _GLIBCXX_END_NAMESPACE_VERSION 503 } // namespace 504 505 namespace std _GLIBCXX_VISIBILITY(default) 506 { 507 _GLIBCXX_BEGIN_NAMESPACE_VERSION 508 509 // Specialization of insert_iterator so that it will work for hash_map 510 // and hash_multimap. 511 template<class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc> 512 class insert_iterator<__gnu_cxx::hash_map<_Key, _Tp, _HashFn, 513 _EqKey, _Alloc> > 514 { 515 protected: 516 typedef __gnu_cxx::hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc> 517 _Container; 518 _Container* container; 519 520 public: 521 typedef _Container container_type; 522 typedef output_iterator_tag iterator_category; 523 typedef void value_type; 524 typedef void difference_type; 525 typedef void pointer; 526 typedef void reference; 527 528 insert_iterator(_Container& __x) 529 : container(&__x) {} 530 531 insert_iterator(_Container& __x, typename _Container::iterator) 532 : container(&__x) {} 533 534 insert_iterator<_Container>& 535 operator=(const typename _Container::value_type& __value) 536 { 537 container->insert(__value); 538 return *this; 539 } 540 541 insert_iterator<_Container>& 542 operator*() 543 { return *this; } 544 545 insert_iterator<_Container>& 546 operator++() { return *this; } 547 548 insert_iterator<_Container>& 549 operator++(int) 550 { return *this; } 551 }; 552 553 template<class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc> 554 class insert_iterator<__gnu_cxx::hash_multimap<_Key, _Tp, _HashFn, 555 _EqKey, _Alloc> > 556 { 557 protected: 558 typedef __gnu_cxx::hash_multimap<_Key, _Tp, _HashFn, _EqKey, _Alloc> 559 _Container; 560 _Container* container; 561 typename _Container::iterator iter; 562 563 public: 564 typedef _Container container_type; 565 typedef output_iterator_tag iterator_category; 566 typedef void value_type; 567 typedef void difference_type; 568 typedef void pointer; 569 typedef void reference; 570 571 insert_iterator(_Container& __x) 572 : container(&__x) {} 573 574 insert_iterator(_Container& __x, typename _Container::iterator) 575 : container(&__x) {} 576 577 insert_iterator<_Container>& 578 operator=(const typename _Container::value_type& __value) 579 { 580 container->insert(__value); 581 return *this; 582 } 583 584 insert_iterator<_Container>& 585 operator*() 586 { return *this; } 587 588 insert_iterator<_Container>& 589 operator++() 590 { return *this; } 591 592 insert_iterator<_Container>& 593 operator++(int) 594 { return *this; } 595 }; 596 597 _GLIBCXX_END_NAMESPACE_VERSION 598 } // namespace 599 600 #endif 601
