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

   1 // Vector implementation (out of line) -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004 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 _GLIBCXX_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(__N("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_impl._M_start,
  78                                                this->_M_impl._M_finish);
  79           std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish);
  80           _M_deallocate(this->_M_impl._M_start,
  81                         this->_M_impl._M_end_of_storage
  82                         - this->_M_impl._M_start);
  83           this->_M_impl._M_start = __tmp;
  84           this->_M_impl._M_finish = __tmp + __old_size;
  85           this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n;
  86         }
  87     }
  88
  89   template<typename _Tp, typename _Alloc>
  90     typename vector<_Tp, _Alloc>::iterator
  91     vector<_Tp, _Alloc>::
  92     insert(iterator __position, const value_type& __x)
  93     {
  94       const size_type __n = __position - begin();
  95       if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage
  96           && __position == end())
  97         {
  98           std::_Construct(this->_M_impl._M_finish, __x);
  99           ++this->_M_impl._M_finish;
 100         }
 101       else
 102         _M_insert_aux(__position, __x);
 103       return begin() + __n;
 104     }
 105
 106   template<typename _Tp, typename _Alloc>
 107     typename vector<_Tp, _Alloc>::iterator
 108     vector<_Tp, _Alloc>::
 109     erase(iterator __position)
 110     {
 111       if (__position + 1 != end())
 112         std::copy(__position + 1, end(), __position);
 113       --this->_M_impl._M_finish;
 114       std::_Destroy(this->_M_impl._M_finish);
 115       return __position;
 116     }
 117
 118   template<typename _Tp, typename _Alloc>
 119     typename vector<_Tp, _Alloc>::iterator
 120     vector<_Tp, _Alloc>::
 121     erase(iterator __first, iterator __last)
 122     {
 123       iterator __i(copy(__last, end(), __first));
 124       std::_Destroy(__i, end());
 125       this->_M_impl._M_finish = this->_M_impl._M_finish - (__last - __first);
 126       return __first;
 127     }
 128
 129   template<typename _Tp, typename _Alloc>
 130     vector<_Tp, _Alloc>&
 131     vector<_Tp, _Alloc>::
 132     operator=(const vector<_Tp, _Alloc>& __x)
 133     {
 134       if (&__x != this)
 135         {
 136           const size_type __xlen = __x.size();
 137           if (__xlen > capacity())
 138             {
 139               pointer __tmp = _M_allocate_and_copy(__xlen, __x.begin(),
 140                                                    __x.end());
 141               std::_Destroy(this->_M_impl._M_start,
 142                             this->_M_impl._M_finish);
 143               _M_deallocate(this->_M_impl._M_start,
 144                             this->_M_impl._M_end_of_storage
 145                             - this->_M_impl._M_start);
 146               this->_M_impl._M_start = __tmp;
 147               this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __xlen;
 148             }
 149           else if (size() >= __xlen)
 150             {
 151               iterator __i(copy(__x.begin(), __x.end(), begin()));
 152               std::_Destroy(__i, end());
 153             }
 154           else
 155             {
 156               std::copy(__x.begin(), __x.begin() + size(),
 157                         this->_M_impl._M_start);
 158               std::uninitialized_copy(__x.begin() + size(),
 159                                       __x.end(), this->_M_impl._M_finish);
 160             }
 161           this->_M_impl._M_finish = this->_M_impl._M_start + __xlen;
 162         }
 163       return *this;
 164     }
 165
 166   template<typename _Tp, typename _Alloc>
 167     void
 168     vector<_Tp, _Alloc>::
 169     _M_fill_assign(size_t __n, const value_type& __val)
 170     {
 171       if (__n > capacity())
 172         {
 173           vector __tmp(__n, __val, get_allocator());
 174           __tmp.swap(*this);
 175         }
 176       else if (__n > size())
 177         {
 178           std::fill(begin(), end(), __val);
 179           this->_M_impl._M_finish = std::uninitialized_fill_n(this->
 180                                                               _M_impl._M_finish,
 181                                                               __n - size(),
 182                                                               __val);
 183         }
 184       else
 185         erase(fill_n(begin(), __n, __val), end());
 186     }
 187
 188   template<typename _Tp, typename _Alloc>
 189     template<typename _InputIterator>
 190       void
 191       vector<_Tp, _Alloc>::
 192       _M_assign_aux(_InputIterator __first, _InputIterator __last,
 193                     input_iterator_tag)
 194       {
 195         iterator __cur(begin());
 196         for (; __first != __last && __cur != end(); ++__cur, ++__first)
 197           *__cur = *__first;
 198         if (__first == __last)
 199           erase(__cur, end());
 200         else
 201           insert(end(), __first, __last);
 202       }
 203
 204   template<typename _Tp, typename _Alloc>
 205     template<typename _ForwardIterator>
 206       void
 207       vector<_Tp, _Alloc>::
 208       _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
 209                     forward_iterator_tag)
 210       {
 211         const size_type __len = std::distance(__first, __last);
 212
 213         if (__len > capacity())
 214           {
 215             pointer __tmp(_M_allocate_and_copy(__len, __first, __last));
 216             std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish);
 217             _M_deallocate(this->_M_impl._M_start,
 218                           this->_M_impl._M_end_of_storage
 219                           - this->_M_impl._M_start);
 220             this->_M_impl._M_start = __tmp;
 221             this->_M_impl._M_finish = this->_M_impl._M_start + __len;
 222             this->_M_impl._M_end_of_storage = this->_M_impl._M_finish;
 223           }
 224         else if (size() >= __len)
 225           {
 226             iterator __new_finish(copy(__first, __last,
 227                                        this->_M_impl._M_start));
 228             std::_Destroy(__new_finish, end());
 229             this->_M_impl._M_finish = __new_finish.base();
 230           }
 231         else
 232           {
 233             _ForwardIterator __mid = __first;
 234             std::advance(__mid, size());
 235             std::copy(__first, __mid, this->_M_impl._M_start);
 236             this->_M_impl._M_finish = std::uninitialized_copy(__mid,
 237                                                               __last,
 238                                                               this->_M_impl.
 239                                                               _M_finish);
 240           }
 241       }
 242
 243   template<typename _Tp, typename _Alloc>
 244     void
 245     vector<_Tp, _Alloc>::
 246     _M_insert_aux(iterator __position, const _Tp& __x)
 247     {
 248       if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
 249         {
 250           std::_Construct(this->_M_impl._M_finish,
 251                           *(this->_M_impl._M_finish - 1));
 252           ++this->_M_impl._M_finish;
 253           _Tp __x_copy = __x;
 254           std::copy_backward(__position,
 255                              iterator(this->_M_impl._M_finish-2),
 256                              iterator(this->_M_impl._M_finish-1));
 257           *__position = __x_copy;
 258         }
 259       else
 260         {
 261           const size_type __old_size = size();
 262           const size_type __len = __old_size != 0 ? 2 * __old_size : 1;
 263           iterator __new_start(this->_M_allocate(__len));
 264           iterator __new_finish(__new_start);
 265           try
 266             {
 267               __new_finish = std::uninitialized_copy(iterator(this->
 268                                                               _M_impl._M_start),
 269                                                      __position,
 270                                                      __new_start);
 271               std::_Construct(__new_finish.base(), __x);
 272               ++__new_finish;
 273               __new_finish = std::uninitialized_copy(__position,
 274                                                      iterator(this->_M_impl.
 275                                                               _M_finish),
 276                                                      __new_finish);
 277           }
 278           catch(...)
 279             {
 280               std::_Destroy(__new_start,__new_finish);
 281               _M_deallocate(__new_start.base(),__len);
 282               __throw_exception_again;
 283             }
 284           std::_Destroy(begin(), end());
 285           _M_deallocate(this->_M_impl._M_start,
 286                         this->_M_impl._M_end_of_storage
 287                         - this->_M_impl._M_start);
 288           this->_M_impl._M_start = __new_start.base();
 289           this->_M_impl._M_finish = __new_finish.base();
 290           this->_M_impl._M_end_of_storage = __new_start.base() + __len;
 291         }
 292     }
 293
 294   template<typename _Tp, typename _Alloc>
 295     void
 296     vector<_Tp, _Alloc>::
 297     _M_fill_insert(iterator __position, size_type __n, const value_type& __x)
 298     {
 299       if (__n != 0)
 300         {
 301           if (size_type(this->_M_impl._M_end_of_storage
 302                         - this->_M_impl._M_finish) >= __n)
 303             {
 304               value_type __x_copy = __x;
 305               const size_type __elems_after = end() - __position;
 306               iterator __old_finish(this->_M_impl._M_finish);
 307               if (__elems_after > __n)
 308                 {
 309                   std::uninitialized_copy(this->_M_impl._M_finish - __n,
 310                                           this->_M_impl._M_finish,
 311                                           this->_M_impl._M_finish);
 312                   this->_M_impl._M_finish += __n;
 313                   std::copy_backward(__position, __old_finish - __n,
 314                                      __old_finish);
 315                   std::fill(__position, __position + __n, __x_copy);
 316                 }
 317               else
 318                 {
 319                   std::uninitialized_fill_n(this->_M_impl._M_finish,
 320                                             __n - __elems_after,
 321                                             __x_copy);
 322                   this->_M_impl._M_finish += __n - __elems_after;
 323                   std::uninitialized_copy(__position, __old_finish,
 324                                           this->_M_impl._M_finish);
 325                   this->_M_impl._M_finish += __elems_after;
 326                   std::fill(__position, __old_finish, __x_copy);
 327                 }
 328             }
 329           else
 330             {
 331               const size_type __old_size = size();
 332               const size_type __len = __old_size + std::max(__old_size, __n);
 333               iterator __new_start(this->_M_allocate(__len));
 334               iterator __new_finish(__new_start);
 335               try
 336                 {
 337                   __new_finish = std::uninitialized_copy(begin(), __position,
 338                                                          __new_start);
 339                   __new_finish = std::uninitialized_fill_n(__new_finish, __n,
 340                                                            __x);
 341                   __new_finish = std::uninitialized_copy(__position, end(),
 342                                                          __new_finish);
 343                 }
 344               catch(...)
 345                 {
 346                   std::_Destroy(__new_start,__new_finish);
 347                   _M_deallocate(__new_start.base(),__len);
 348                   __throw_exception_again;
 349                 }
 350               std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish);
 351               _M_deallocate(this->_M_impl._M_start,
 352                             this->_M_impl._M_end_of_storage
 353                             - this->_M_impl._M_start);
 354               this->_M_impl._M_start = __new_start.base();
 355               this->_M_impl._M_finish = __new_finish.base();
 356               this->_M_impl._M_end_of_storage = __new_start.base() + __len;
 357             }
 358         }
 359     }
 360
 361   template<typename _Tp, typename _Alloc> template<typename _InputIterator>
 362     void
 363     vector<_Tp, _Alloc>::
 364     _M_range_insert(iterator __pos, _InputIterator __first,
 365                     _InputIterator __last, input_iterator_tag)
 366     {
 367       for (; __first != __last; ++__first)
 368         {
 369           __pos = insert(__pos, *__first);
 370           ++__pos;
 371         }
 372     }
 373
 374   template<typename _Tp, typename _Alloc>
 375     template<typename _ForwardIterator>
 376       void
 377       vector<_Tp, _Alloc>::
 378       _M_range_insert(iterator __position,_ForwardIterator __first,
 379                       _ForwardIterator __last, forward_iterator_tag)
 380       {
 381         if (__first != __last)
 382           {
 383             const size_type __n = std::distance(__first, __last);
 384             if (size_type(this->_M_impl._M_end_of_storage
 385                           - this->_M_impl._M_finish) >= __n)
 386               {
 387                 const size_type __elems_after = end() - __position;
 388                 iterator __old_finish(this->_M_impl._M_finish);
 389                 if (__elems_after > __n)
 390                   {
 391                     std::uninitialized_copy(this->_M_impl._M_finish - __n,
 392                                             this->_M_impl._M_finish,
 393                                             this->_M_impl._M_finish);
 394                     this->_M_impl._M_finish += __n;
 395                     std::copy_backward(__position, __old_finish - __n,
 396                                        __old_finish);
 397                     std::copy(__first, __last, __position);
 398                   }
 399                 else
 400                   {
 401                     _ForwardIterator __mid = __first;
 402                     std::advance(__mid, __elems_after);
 403                     std::uninitialized_copy(__mid, __last,
 404                                             this->_M_impl._M_finish);
 405                     this->_M_impl._M_finish += __n - __elems_after;
 406                     std::uninitialized_copy(__position, __old_finish,
 407                                             this->_M_impl._M_finish);
 408                     this->_M_impl._M_finish += __elems_after;
 409                     std::copy(__first, __mid, __position);
 410                   }
 411               }
 412             else
 413               {
 414                 const size_type __old_size = size();
 415                 const size_type __len = __old_size + std::max(__old_size, __n);
 416                 iterator __new_start(this->_M_allocate(__len));
 417                 iterator __new_finish(__new_start);
 418                 try
 419                   {
 420                     __new_finish = std::uninitialized_copy(iterator(this->
 421                                                                     _M_impl.
 422                                                                     _M_start),
 423                                                            __position,
 424                                                            __new_start);
 425                     __new_finish = std::uninitialized_copy(__first, __last,
 426                                                            __new_finish);
 427                     __new_finish = std::uninitialized_copy(__position,
 428                                                            iterator(this->
 429                                                                     _M_impl.
 430                                                                     _M_finish),
 431                                                            __new_finish);
 432                   }
 433                 catch(...)
 434                   {
 435                     std::_Destroy(__new_start,__new_finish);
 436                     _M_deallocate(__new_start.base(), __len);
 437                     __throw_exception_again;
 438                   }
 439                 std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish);
 440                 _M_deallocate(this->_M_impl._M_start,
 441                               this->_M_impl._M_end_of_storage
 442                               - this->_M_impl._M_start);
 443                 this->_M_impl._M_start = __new_start.base();
 444                 this->_M_impl._M_finish = __new_finish.base();
 445                 this->_M_impl._M_end_of_storage = __new_start.base() + __len;
 446               }
 447           }
 448       }
 449 } // namespace std
 450
 451 #endif /* _VECTOR_TCC */