libstdc++-v3/include/bits/vector.tcc

   1 // Vector implementation (out of line) -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 /*
  31  *
  32  * Copyright (c) 1994
  33  * Hewlett-Packard Company
  34  *
  35  * Permission to use, copy, modify, distribute and sell this software
  36  * and its documentation for any purpose is hereby granted without fee,
  37  * provided that the above copyright notice appear in all copies and
  38  * that both that copyright notice and this permission notice appear
  39  * in supporting documentation.  Hewlett-Packard Company makes no
  40  * representations about the suitability of this software for any
  41  * purpose.  It is provided "as is" without express or implied warranty.
  42  *
  43  *
  44  * Copyright (c) 1996
  45  * Silicon Graphics Computer Systems, Inc.
  46  *
  47  * Permission to use, copy, modify, distribute and sell this software
  48  * and its documentation for any purpose is hereby granted without fee,
  49  * provided that the above copyright notice appear in all copies and
  50  * that both that copyright notice and this permission notice appear
  51  * in supporting documentation.  Silicon Graphics makes no
  52  * representations about the suitability of this  software for any
  53  * purpose.  It is provided "as is" without express or implied warranty.
  54  */
  55
  56 /** @file vector.tcc
  57  *  This is an internal header file, included by other library headers.
  58  *  You should not attempt to use it directly.
  59  */
  60
  61 #ifndef _VECTOR_TCC
  62 #define _VECTOR_TCC 1
  63
  64 namespace std
  65 {
  66   template<typename _Tp, typename _Alloc>
  67     void
  68     vector<_Tp,_Alloc>::
  69     reserve(size_type __n)
  70     {
  71       if (__n > this->max_size())
  72         __throw_length_error("vector::reserve");
  73       if (this->capacity() < __n)
  74         {
  75           const size_type __old_size = size();
  76           pointer __tmp = _M_allocate_and_copy(__n,
  77                                                this->_M_start,
  78                                                this->_M_finish);
  79           std::_Destroy(this->_M_start, this->_M_finish);
  80           _M_deallocate(this->_M_start,
  81                         this->_M_end_of_storage - this->_M_start);
  82           this->_M_start = __tmp;
  83           this->_M_finish = __tmp + __old_size;
  84           this->_M_end_of_storage = this->_M_start + __n;
  85         }
  86     }
  87
  88   template<typename _Tp, typename _Alloc>
  89     typename vector<_Tp,_Alloc>::iterator
  90     vector<_Tp,_Alloc>::
  91     insert(iterator __position, const value_type& __x)
  92     {
  93       size_type __n = __position - begin();
  94       if (this->_M_finish != this->_M_end_of_storage && __position == end())
  95       {
  96         std::_Construct(this->_M_finish, __x);
  97         ++this->_M_finish;
  98       }
  99       else
 100         _M_insert_aux(__position, __x);
 101       return begin() + __n;
 102     }
 103
 104   template<typename _Tp, typename _Alloc>
 105     typename vector<_Tp,_Alloc>::iterator
 106     vector<_Tp,_Alloc>::
 107     erase(iterator __position)
 108     {
 109       if (__position + 1 != end())
 110         std::copy(__position + 1, end(), __position);
 111       --this->_M_finish;
 112       std::_Destroy(this->_M_finish);
 113       return __position;
 114     }
 115
 116   template<typename _Tp, typename _Alloc>
 117     typename vector<_Tp,_Alloc>::iterator
 118     vector<_Tp,_Alloc>::
 119     erase(iterator __first, iterator __last)
 120     {
 121       iterator __i(copy(__last, end(), __first));
 122       std::_Destroy(__i, end());
 123       this->_M_finish = this->_M_finish - (__last - __first);
 124       return __first;
 125     }
 126
 127   template<typename _Tp, typename _Alloc>
 128     vector<_Tp,_Alloc>&
 129     vector<_Tp,_Alloc>::
 130     operator=(const vector<_Tp,_Alloc>& __x)
 131     {
 132       if (&__x != this)
 133       {
 134         const size_type __xlen = __x.size();
 135         if (__xlen > capacity())
 136         {
 137           pointer __tmp = _M_allocate_and_copy(__xlen, __x.begin(), __x.end());
 138           std::_Destroy(this->_M_start, this->_M_finish);
 139           _M_deallocate(this->_M_start,
 140                         this->_M_end_of_storage - this->_M_start);
 141           this->_M_start = __tmp;
 142           this->_M_end_of_storage = this->_M_start + __xlen;
 143         }
 144         else if (size() >= __xlen)
 145         {
 146           iterator __i(copy(__x.begin(), __x.end(), begin()));
 147           std::_Destroy(__i, end());
 148         }
 149         else
 150         {
 151           std::copy(__x.begin(), __x.begin() + size(), this->_M_start);
 152           std::uninitialized_copy(__x.begin() + size(), __x.end(), this->_M_finish);
 153         }
 154         this->_M_finish = this->_M_start + __xlen;
 155       }
 156       return *this;
 157     }
 158
 159   template<typename _Tp, typename _Alloc>
 160     void
 161     vector<_Tp,_Alloc>::
 162     _M_fill_assign(size_t __n, const value_type& __val)
 163     {
 164       if (__n > capacity())
 165       {
 166         vector __tmp(__n, __val, get_allocator());
 167         __tmp.swap(*this);
 168       }
 169       else if (__n > size())
 170       {
 171         std::fill(begin(), end(), __val);
 172         this->_M_finish
 173           = std::uninitialized_fill_n(this->_M_finish, __n - size(), __val);
 174       }
 175       else
 176         erase(fill_n(begin(), __n, __val), end());
 177     }
 178
 179   template<typename _Tp, typename _Alloc> template<typename _InputIterator>
 180     void
 181     vector<_Tp,_Alloc>::
 182     _M_assign_aux(_InputIterator __first, _InputIterator __last, input_iterator_tag)
 183     {
 184       iterator __cur(begin());
 185       for ( ; __first != __last && __cur != end(); ++__cur, ++__first)
 186         *__cur = *__first;
 187       if (__first == __last)
 188         erase(__cur, end());
 189       else
 190         insert(end(), __first, __last);
 191     }
 192
 193   template<typename _Tp, typename _Alloc> template<typename _ForwardIterator>
 194     void
 195     vector<_Tp,_Alloc>::
 196     _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
 197                   forward_iterator_tag)
 198     {
 199       size_type __len = std::distance(__first, __last);
 200
 201       if (__len > capacity())
 202       {
 203         pointer __tmp(_M_allocate_and_copy(__len, __first, __last));
 204         std::_Destroy(this->_M_start, this->_M_finish);
 205         _M_deallocate(this->_M_start,
 206                       this->_M_end_of_storage - this->_M_start);
 207         this->_M_start = __tmp;
 208         this->_M_end_of_storage = this->_M_finish = this->_M_start + __len;
 209       }
 210       else if (size() >= __len)
 211       {
 212         iterator __new_finish(copy(__first, __last, this->_M_start));
 213         std::_Destroy(__new_finish, end());
 214         this->_M_finish = __new_finish.base();
 215       }
 216       else
 217       {
 218         _ForwardIterator __mid = __first;
 219         std::advance(__mid, size());
 220         std::copy(__first, __mid, this->_M_start);
 221         this->_M_finish = std::uninitialized_copy(__mid, __last, this->_M_finish);
 222       }
 223     }
 224
 225   template<typename _Tp, typename _Alloc>
 226     void
 227     vector<_Tp,_Alloc>::
 228     _M_insert_aux(iterator __position, const _Tp& __x)
 229     {
 230       if (this->_M_finish != this->_M_end_of_storage)
 231       {
 232         std::_Construct(this->_M_finish, *(this->_M_finish - 1));
 233         ++this->_M_finish;
 234         _Tp __x_copy = __x;
 235         std::copy_backward(__position,
 236                            iterator(this->_M_finish-2),
 237                            iterator(this->_M_finish-1));
 238         *__position = __x_copy;
 239       }
 240       else
 241       {
 242         const size_type __old_size = size();
 243         const size_type __len = __old_size != 0 ? 2 * __old_size : 1;
 244         iterator __new_start(_M_allocate(__len));
 245         iterator __new_finish(__new_start);
 246         try
 247           {
 248             __new_finish = std::uninitialized_copy(iterator(this->_M_start),
 249                                                    __position,
 250                                                    __new_start);
 251             std::_Construct(__new_finish.base(), __x);
 252             ++__new_finish;
 253             __new_finish = std::uninitialized_copy(__position,
 254                                                    iterator(this->_M_finish),
 255                                                    __new_finish);
 256           }
 257         catch(...)
 258           {
 259             std::_Destroy(__new_start,__new_finish);
 260             _M_deallocate(__new_start.base(),__len);
 261             __throw_exception_again;
 262           }
 263         std::_Destroy(begin(), end());
 264         _M_deallocate(this->_M_start,
 265                       this->_M_end_of_storage - this->_M_start);
 266         this->_M_start = __new_start.base();
 267         this->_M_finish = __new_finish.base();
 268         this->_M_end_of_storage = __new_start.base() + __len;
 269       }
 270     }
 271
 272   #ifdef _GLIBCXX_DEPRECATED
 273   template<typename _Tp, typename _Alloc>
 274     void
 275     vector<_Tp,_Alloc>::
 276     _M_insert_aux(iterator __position)
 277     {
 278       if (_M_finish != _M_end_of_storage)
 279       {
 280         std::_Construct(_M_finish, *(_M_finish - 1));
 281         ++_M_finish;
 282         std::copy_backward(__position, iterator(_M_finish - 2),
 283                            iterator(_M_finish - 1));
 284         *__position = value_type();
 285       }
 286       else
 287       {
 288         const size_type __old_size = size();
 289         const size_type __len = __old_size != 0 ? 2 * __old_size : 1;
 290         pointer __new_start = _M_allocate(__len);
 291         pointer __new_finish = __new_start;
 292         try
 293           {
 294             __new_finish = std::uninitialized_copy(iterator(_M_start), __position,
 295                                                    __new_start);
 296             std::_Construct(__new_finish);
 297             ++__new_finish;
 298             __new_finish = std::uninitialized_copy(__position, iterator(_M_finish),
 299                                                    __new_finish);
 300           }
 301         catch(...)
 302           {
 303             std::_Destroy(__new_start,__new_finish);
 304             _M_deallocate(__new_start,__len);
 305             __throw_exception_again;
 306           }
 307         std::_Destroy(begin(), end());
 308         _M_deallocate(_M_start, _M_end_of_storage - _M_start);
 309         _M_start = __new_start;
 310         _M_finish = __new_finish;
 311         _M_end_of_storage = __new_start + __len;
 312       }
 313     }
 314   #endif
 315
 316   template<typename _Tp, typename _Alloc>
 317     void
 318     vector<_Tp,_Alloc>::
 319     _M_fill_insert(iterator __position, size_type __n, const value_type& __x)
 320     {
 321       if (__n != 0)
 322       {
 323         if (size_type(this->_M_end_of_storage - this->_M_finish) >= __n)
 324           {
 325            value_type __x_copy = __x;
 326            const size_type __elems_after = end() - __position;
 327            iterator __old_finish(this->_M_finish);
 328            if (__elems_after > __n)
 329              {
 330                std::uninitialized_copy(this->_M_finish - __n,
 331                                        this->_M_finish,
 332                                        this->_M_finish);
 333                this->_M_finish += __n;
 334                std::copy_backward(__position, __old_finish - __n, __old_finish);
 335                std::fill(__position, __position + __n, __x_copy);
 336              }
 337            else
 338              {
 339                std::uninitialized_fill_n(this->_M_finish,
 340                                          __n - __elems_after,
 341                                          __x_copy);
 342                this->_M_finish += __n - __elems_after;
 343                std::uninitialized_copy(__position, __old_finish, this->_M_finish);
 344                this->_M_finish += __elems_after;
 345                std::fill(__position, __old_finish, __x_copy);
 346              }
 347           }
 348         else
 349           {
 350             const size_type __old_size = size();
 351             const size_type __len = __old_size + std::max(__old_size, __n);
 352             iterator __new_start(_M_allocate(__len));
 353             iterator __new_finish(__new_start);
 354             try
 355               {
 356                 __new_finish = std::uninitialized_copy(begin(), __position,
 357                                                        __new_start);
 358                 __new_finish = std::uninitialized_fill_n(__new_finish, __n, __x);
 359                 __new_finish = std::uninitialized_copy(__position, end(),
 360                                                        __new_finish);
 361               }
 362             catch(...)
 363               {
 364                 std::_Destroy(__new_start,__new_finish);
 365                 _M_deallocate(__new_start.base(),__len);
 366                 __throw_exception_again;
 367               }
 368             std::_Destroy(this->_M_start, this->_M_finish);
 369             _M_deallocate(this->_M_start,
 370                           this->_M_end_of_storage - this->_M_start);
 371             this->_M_start = __new_start.base();
 372             this->_M_finish = __new_finish.base();
 373             this->_M_end_of_storage = __new_start.base() + __len;
 374           }
 375       }
 376     }
 377
 378   template<typename _Tp, typename _Alloc> template<typename _InputIterator>
 379     void
 380     vector<_Tp,_Alloc>::
 381     _M_range_insert(iterator __pos,
 382                     _InputIterator __first, _InputIterator __last,
 383                     input_iterator_tag)
 384     {
 385       for ( ; __first != __last; ++__first)
 386       {
 387         __pos = insert(__pos, *__first);
 388         ++__pos;
 389       }
 390     }
 391
 392   template<typename _Tp, typename _Alloc> template<typename _ForwardIterator>
 393     void
 394     vector<_Tp,_Alloc>::
 395     _M_range_insert(iterator __position,_ForwardIterator __first,
 396                     _ForwardIterator __last, forward_iterator_tag)
 397     {
 398       if (__first != __last)
 399       {
 400         size_type __n = std::distance(__first, __last);
 401         if (size_type(this->_M_end_of_storage - this->_M_finish) >= __n)
 402         {
 403           const size_type __elems_after = end() - __position;
 404           iterator __old_finish(this->_M_finish);
 405           if (__elems_after > __n)
 406           {
 407             std::uninitialized_copy(this->_M_finish - __n,
 408                                     this->_M_finish,
 409                                     this->_M_finish);
 410             this->_M_finish += __n;
 411             std::copy_backward(__position, __old_finish - __n, __old_finish);
 412             std::copy(__first, __last, __position);
 413           }
 414           else
 415           {
 416             _ForwardIterator __mid = __first;
 417             std::advance(__mid, __elems_after);
 418             std::uninitialized_copy(__mid, __last, this->_M_finish);
 419             this->_M_finish += __n - __elems_after;
 420             std::uninitialized_copy(__position, __old_finish, this->_M_finish);
 421             this->_M_finish += __elems_after;
 422             std::copy(__first, __mid, __position);
 423           }
 424         }
 425         else
 426         {
 427           const size_type __old_size = size();
 428           const size_type __len = __old_size + std::max(__old_size, __n);
 429           iterator __new_start(_M_allocate(__len));
 430           iterator __new_finish(__new_start);
 431           try
 432             {
 433               __new_finish = std::uninitialized_copy(iterator(this->_M_start),
 434                                                      __position, __new_start);
 435               __new_finish = std::uninitialized_copy(__first, __last, __new_finish);
 436               __new_finish = std::uninitialized_copy(__position,
 437                                                      iterator(this->_M_finish),
 438                                                      __new_finish);
 439             }
 440           catch(...)
 441             {
 442               std::_Destroy(__new_start,__new_finish);
 443               _M_deallocate(__new_start.base(), __len);
 444               __throw_exception_again;
 445             }
 446           std::_Destroy(this->_M_start, this->_M_finish);
 447           _M_deallocate(this->_M_start,
 448                         this->_M_end_of_storage - this->_M_start);
 449           this->_M_start = __new_start.base();
 450           this->_M_finish = __new_finish.base();
 451           this->_M_end_of_storage = __new_start.base() + __len;
 452         }
 453       }
 454     }
 455 } // namespace std
 456
 457 #endif /* _VECTOR_TCC */