Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. // -*- C++ -*-
  2.  
  3. // Copyright (C) 2005-2015 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 terms
  7. // of the GNU General Public License as published by the Free Software
  8. // Foundation; either version 3, or (at your option) any later
  9. // version.
  10.  
  11. // This library is distributed in the hope that it will be useful, but
  12. // WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14. // 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. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  26.  
  27. // Permission to use, copy, modify, sell, and distribute this software
  28. // is hereby granted without fee, provided that the above copyright
  29. // notice appears in all copies, and that both that copyright notice
  30. // and this permission notice appear in supporting documentation. None
  31. // of the above authors, nor IBM Haifa Research Laboratories, make any
  32. // representation about the suitability of this software for any
  33. // purpose. It is provided "as is" without express or implied
  34. // warranty.
  35.  
  36. /**
  37.  * @file hash_exponential_size_policy_imp.hpp
  38.  * Contains a resize size policy implementation.
  39.  */
  40.  
  41. PB_DS_CLASS_T_DEC
  42. PB_DS_CLASS_C_DEC::
  43. hash_exponential_size_policy(size_type start_size, size_type grow_factor) :
  44.   m_start_size(start_size),
  45.   m_grow_factor(grow_factor)
  46. { }
  47.  
  48. PB_DS_CLASS_T_DEC
  49. void
  50. PB_DS_CLASS_C_DEC::
  51. swap(PB_DS_CLASS_C_DEC& other)
  52. {
  53.   std::swap(m_start_size, other.m_start_size);
  54.   std::swap(m_grow_factor, other.m_grow_factor);
  55. }
  56.  
  57. PB_DS_CLASS_T_DEC
  58. typename PB_DS_CLASS_C_DEC::size_type
  59. PB_DS_CLASS_C_DEC::
  60. get_nearest_larger_size(size_type size) const
  61. {
  62.   size_type ret = m_start_size;
  63.   while (ret <= size)
  64.     {
  65.       const size_type next_ret = ret*  m_grow_factor;
  66.       if (next_ret < ret)
  67.         __throw_insert_error();
  68.       ret = next_ret;
  69.     }
  70.   return ret;
  71. }
  72.  
  73. PB_DS_CLASS_T_DEC
  74. typename PB_DS_CLASS_C_DEC::size_type
  75. PB_DS_CLASS_C_DEC::
  76. get_nearest_smaller_size(size_type size) const
  77. {
  78.   size_type ret = m_start_size;
  79.   while (true)
  80.     {
  81.       const size_type next_ret = ret*  m_grow_factor;
  82.       if (next_ret < ret)
  83.         __throw_resize_error();
  84.       if (next_ret >= size)
  85.         return (ret);
  86.       ret = next_ret;
  87.     }
  88.   return ret;
  89. }
  90.  
  91.