Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  1. // HP/SGI iterator extensions -*- C++ -*-
  2.  
  3. // Copyright (C) 2001-2013 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. /*
  26.  *
  27.  * Copyright (c) 1994
  28.  * Hewlett-Packard Company
  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.  Hewlett-Packard Company 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) 1996-1998
  40.  * Silicon Graphics Computer Systems, Inc.
  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.  Silicon Graphics 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. /** @file ext/iterator
  52.  *  This file is a GNU extension to the Standard C++ Library (possibly
  53.  *  containing extensions from the HP/SGI STL subset).
  54.  */
  55.  
  56. #ifndef _EXT_ITERATOR
  57. #define _EXT_ITERATOR 1
  58.  
  59. #pragma GCC system_header
  60.  
  61. #include <bits/concept_check.h>
  62. #include <iterator>
  63.  
  64. namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
  65. {
  66. _GLIBCXX_BEGIN_NAMESPACE_VERSION
  67.  
  68.   // There are two signatures for distance.  In addition to the one
  69.   // taking two iterators and returning a result, there is another
  70.   // taking two iterators and a reference-to-result variable, and
  71.   // returning nothing.  The latter seems to be an SGI extension.
  72.   // -- pedwards
  73.   template<typename _InputIterator, typename _Distance>
  74.     inline void
  75.     __distance(_InputIterator __first, _InputIterator __last,
  76.                _Distance& __n, std::input_iterator_tag)
  77.     {
  78.       // concept requirements
  79.       __glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)
  80.       while (__first != __last)
  81.         {
  82.           ++__first;
  83.           ++__n;
  84.         }
  85.     }
  86.  
  87.   template<typename _RandomAccessIterator, typename _Distance>
  88.     inline void
  89.     __distance(_RandomAccessIterator __first, _RandomAccessIterator __last,
  90.                _Distance& __n, std::random_access_iterator_tag)
  91.     {
  92.       // concept requirements
  93.       __glibcxx_function_requires(_RandomAccessIteratorConcept<
  94.                                   _RandomAccessIterator>)
  95.       __n += __last - __first;
  96.     }
  97.  
  98.   /**
  99.    *  This is an SGI extension.
  100.    *  @ingroup SGIextensions
  101.    *  @doctodo
  102.   */
  103.   template<typename _InputIterator, typename _Distance>
  104.     inline void
  105.     distance(_InputIterator __first, _InputIterator __last,
  106.              _Distance& __n)
  107.     {
  108.       // concept requirements -- taken care of in __distance
  109.       __distance(__first, __last, __n, std::__iterator_category(__first));
  110.     }
  111.  
  112. _GLIBCXX_END_NAMESPACE_VERSION
  113. } // namespace
  114.  
  115. #endif
  116.  
  117.