release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/ext/pb_ds/detail/resize_policy/hash_exponential_size_policy_imp.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2009 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