lemon/bits/default_map.h
author Peter Kovacs <kpeter@inf.elte.hu>
Tue, 15 Mar 2011 19:32:21 +0100
changeset 936 ddd3c0d3d9bf
parent 627 20dac2104519
child 1092 dceba191c00d
permissions -rw-r--r--
Implement the scaling Price Refinement heuristic in CostScaling (#417)
instead of Early Termination.

These two heuristics are similar, but the newer one is faster
and not only makes it possible to skip some epsilon phases, but
it can improve the performance of the other phases, as well.
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2010
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_BITS_DEFAULT_MAP_H
    20 #define LEMON_BITS_DEFAULT_MAP_H
    21 
    22 #include <lemon/config.h>
    23 #include <lemon/bits/array_map.h>
    24 #include <lemon/bits/vector_map.h>
    25 //#include <lemon/bits/debug_map.h>
    26 
    27 //\ingroup graphbits
    28 //\file
    29 //\brief Graph maps that construct and destruct their elements dynamically.
    30 
    31 namespace lemon {
    32 
    33 
    34   //#ifndef LEMON_USE_DEBUG_MAP
    35 
    36   template <typename _Graph, typename _Item, typename _Value>
    37   struct DefaultMapSelector {
    38     typedef ArrayMap<_Graph, _Item, _Value> Map;
    39   };
    40 
    41   // bool
    42   template <typename _Graph, typename _Item>
    43   struct DefaultMapSelector<_Graph, _Item, bool> {
    44     typedef VectorMap<_Graph, _Item, bool> Map;
    45   };
    46 
    47   // char
    48   template <typename _Graph, typename _Item>
    49   struct DefaultMapSelector<_Graph, _Item, char> {
    50     typedef VectorMap<_Graph, _Item, char> Map;
    51   };
    52 
    53   template <typename _Graph, typename _Item>
    54   struct DefaultMapSelector<_Graph, _Item, signed char> {
    55     typedef VectorMap<_Graph, _Item, signed char> Map;
    56   };
    57 
    58   template <typename _Graph, typename _Item>
    59   struct DefaultMapSelector<_Graph, _Item, unsigned char> {
    60     typedef VectorMap<_Graph, _Item, unsigned char> Map;
    61   };
    62 
    63 
    64   // int
    65   template <typename _Graph, typename _Item>
    66   struct DefaultMapSelector<_Graph, _Item, signed int> {
    67     typedef VectorMap<_Graph, _Item, signed int> Map;
    68   };
    69 
    70   template <typename _Graph, typename _Item>
    71   struct DefaultMapSelector<_Graph, _Item, unsigned int> {
    72     typedef VectorMap<_Graph, _Item, unsigned int> Map;
    73   };
    74 
    75 
    76   // short
    77   template <typename _Graph, typename _Item>
    78   struct DefaultMapSelector<_Graph, _Item, signed short> {
    79     typedef VectorMap<_Graph, _Item, signed short> Map;
    80   };
    81 
    82   template <typename _Graph, typename _Item>
    83   struct DefaultMapSelector<_Graph, _Item, unsigned short> {
    84     typedef VectorMap<_Graph, _Item, unsigned short> Map;
    85   };
    86 
    87 
    88   // long
    89   template <typename _Graph, typename _Item>
    90   struct DefaultMapSelector<_Graph, _Item, signed long> {
    91     typedef VectorMap<_Graph, _Item, signed long> Map;
    92   };
    93 
    94   template <typename _Graph, typename _Item>
    95   struct DefaultMapSelector<_Graph, _Item, unsigned long> {
    96     typedef VectorMap<_Graph, _Item, unsigned long> Map;
    97   };
    98 
    99 
   100 #if defined LEMON_HAVE_LONG_LONG
   101 
   102   // long long
   103   template <typename _Graph, typename _Item>
   104   struct DefaultMapSelector<_Graph, _Item, signed long long> {
   105     typedef VectorMap<_Graph, _Item, signed long long> Map;
   106   };
   107 
   108   template <typename _Graph, typename _Item>
   109   struct DefaultMapSelector<_Graph, _Item, unsigned long long> {
   110     typedef VectorMap<_Graph, _Item, unsigned long long> Map;
   111   };
   112 
   113 #endif
   114 
   115 
   116   // float
   117   template <typename _Graph, typename _Item>
   118   struct DefaultMapSelector<_Graph, _Item, float> {
   119     typedef VectorMap<_Graph, _Item, float> Map;
   120   };
   121 
   122 
   123   // double
   124   template <typename _Graph, typename _Item>
   125   struct DefaultMapSelector<_Graph, _Item, double> {
   126     typedef VectorMap<_Graph, _Item,  double> Map;
   127   };
   128 
   129 
   130   // long double
   131   template <typename _Graph, typename _Item>
   132   struct DefaultMapSelector<_Graph, _Item, long double> {
   133     typedef VectorMap<_Graph, _Item, long double> Map;
   134   };
   135 
   136 
   137   // pointer
   138   template <typename _Graph, typename _Item, typename _Ptr>
   139   struct DefaultMapSelector<_Graph, _Item, _Ptr*> {
   140     typedef VectorMap<_Graph, _Item, _Ptr*> Map;
   141   };
   142 
   143 // #else
   144 
   145 //   template <typename _Graph, typename _Item, typename _Value>
   146 //   struct DefaultMapSelector {
   147 //     typedef DebugMap<_Graph, _Item, _Value> Map;
   148 //   };
   149 
   150 // #endif
   151 
   152   // DefaultMap class
   153   template <typename _Graph, typename _Item, typename _Value>
   154   class DefaultMap
   155     : public DefaultMapSelector<_Graph, _Item, _Value>::Map {
   156     typedef typename DefaultMapSelector<_Graph, _Item, _Value>::Map Parent;
   157 
   158   public:
   159     typedef DefaultMap<_Graph, _Item, _Value> Map;
   160 
   161     typedef typename Parent::GraphType GraphType;
   162     typedef typename Parent::Value Value;
   163 
   164     explicit DefaultMap(const GraphType& graph) : Parent(graph) {}
   165     DefaultMap(const GraphType& graph, const Value& value)
   166       : Parent(graph, value) {}
   167 
   168     DefaultMap& operator=(const DefaultMap& cmap) {
   169       return operator=<DefaultMap>(cmap);
   170     }
   171 
   172     template <typename CMap>
   173     DefaultMap& operator=(const CMap& cmap) {
   174       Parent::operator=(cmap);
   175       return *this;
   176     }
   177 
   178   };
   179 
   180 }
   181 
   182 #endif