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/hash_fn/mod_based_range_hashing.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 mod_based_range_hashing.hpp
  38  * Contains a range hashing policy base.
  39  */
  40
  41 #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP
  42 #define PB_DS_MOD_BASED_RANGE_HASHING_HPP
  43
  44 namespace __gnu_pbds
  45 {
  46
  47   namespace detail
  48   {
  49
  50 #define PB_DS_CLASS_T_DEC                       \
  51     template<typename Size_Type>
  52
  53 #define PB_DS_CLASS_C_DEC                                       \
  54     mod_based_range_hashing<                                    \
  55                                                 Size_Type>
  56
  57     template<typename Size_Type>
  58     class mod_based_range_hashing
  59     {
  60     protected:
  61       typedef Size_Type size_type;
  62
  63     protected:
  64       void
  65       swap(PB_DS_CLASS_C_DEC& other);
  66
  67       void
  68       notify_resized(size_type size);
  69
  70       inline size_type
  71       range_hash(size_type hash) const;
  72
  73     private:
  74       size_type m_size;
  75     };
  76
  77     PB_DS_CLASS_T_DEC
  78     void
  79     PB_DS_CLASS_C_DEC::
  80     swap(PB_DS_CLASS_C_DEC& other)
  81     {
  82       std::swap(m_size, other.m_size);
  83     }
  84
  85     PB_DS_CLASS_T_DEC
  86     void
  87     PB_DS_CLASS_C_DEC::
  88     notify_resized(size_type size)
  89     {
  90       m_size = size;
  91     }
  92
  93     PB_DS_CLASS_T_DEC
  94     inline typename PB_DS_CLASS_C_DEC::size_type
  95     PB_DS_CLASS_C_DEC::
  96     range_hash(size_type hash) const
  97     {
  98       return (hash % m_size);
  99     }
 100
 101 #undef PB_DS_CLASS_T_DEC
 102 #undef PB_DS_CLASS_C_DEC
 103
 104   } // namespace detail
 105
 106 } // namespace __gnu_pbds
 107
 108 #endif // #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP