[220] | 1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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| 2 | * |
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| 3 | * This file is a part of LEMON, a generic C++ optimization library. |
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| 4 | * |
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[1270] | 5 | * Copyright (C) 2003-2013 |
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[220] | 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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| 8 | * |
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| 9 | * Permission to use, modify and distribute this software is granted |
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| 10 | * provided that this copyright notice appears in all copies. For |
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| 11 | * precise terms see the accompanying LICENSE file. |
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| 12 | * |
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| 13 | * This software is provided "AS IS" with no warranty of any kind, |
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| 14 | * express or implied, and with no claim as to its suitability for any |
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| 15 | * purpose. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | #ifndef LEMON_CORE_H |
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| 20 | #define LEMON_CORE_H |
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| 21 | |
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| 22 | #include <vector> |
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| 23 | #include <algorithm> |
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| 24 | |
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[543] | 25 | #include <lemon/config.h> |
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[220] | 26 | #include <lemon/bits/enable_if.h> |
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| 27 | #include <lemon/bits/traits.h> |
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[319] | 28 | #include <lemon/assert.h> |
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[220] | 29 | |
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[718] | 30 | // Disable the following warnings when compiling with MSVC: |
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| 31 | // C4250: 'class1' : inherits 'class2::member' via dominance |
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[1327] | 32 | // C4267: conversion from 'size_t' to 'type', possible loss of data |
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[718] | 33 | // C4355: 'this' : used in base member initializer list |
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| 34 | // C4503: 'function' : decorated name length exceeded, name was truncated |
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| 35 | // C4800: 'type' : forcing value to bool 'true' or 'false' (performance warning) |
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| 36 | // C4996: 'function': was declared deprecated |
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| 37 | #ifdef _MSC_VER |
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[1327] | 38 | #pragma warning( disable : 4250 4267 4355 4503 4800 4996 ) |
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[718] | 39 | #endif |
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| 40 | |
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[1325] | 41 | #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8) |
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[1236] | 42 | // Needed by the [DI]GRAPH_TYPEDEFS marcos for gcc 4.8 |
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| 43 | #pragma GCC diagnostic ignored "-Wunused-local-typedefs" |
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| 44 | #endif |
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| 45 | |
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[220] | 46 | ///\file |
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| 47 | ///\brief LEMON core utilities. |
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[229] | 48 | /// |
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| 49 | ///This header file contains core utilities for LEMON. |
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[233] | 50 | ///It is automatically included by all graph types, therefore it usually |
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[229] | 51 | ///do not have to be included directly. |
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[220] | 52 | |
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| 53 | namespace lemon { |
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| 54 | |
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| 55 | /// \brief Dummy type to make it easier to create invalid iterators. |
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| 56 | /// |
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| 57 | /// Dummy type to make it easier to create invalid iterators. |
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| 58 | /// See \ref INVALID for the usage. |
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| 59 | struct Invalid { |
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| 60 | public: |
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| 61 | bool operator==(Invalid) { return true; } |
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| 62 | bool operator!=(Invalid) { return false; } |
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| 63 | bool operator< (Invalid) { return false; } |
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| 64 | }; |
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| 65 | |
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| 66 | /// \brief Invalid iterators. |
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| 67 | /// |
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| 68 | /// \ref Invalid is a global type that converts to each iterator |
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| 69 | /// in such a way that the value of the target iterator will be invalid. |
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| 70 | #ifdef LEMON_ONLY_TEMPLATES |
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| 71 | const Invalid INVALID = Invalid(); |
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| 72 | #else |
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| 73 | extern const Invalid INVALID; |
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| 74 | #endif |
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| 75 | |
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| 76 | /// \addtogroup gutils |
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| 77 | /// @{ |
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| 78 | |
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[300] | 79 | ///Create convenience typedefs for the digraph types and iterators |
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[220] | 80 | |
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[282] | 81 | ///This \c \#define creates convenient type definitions for the following |
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| 82 | ///types of \c Digraph: \c Node, \c NodeIt, \c Arc, \c ArcIt, \c InArcIt, |
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[220] | 83 | ///\c OutArcIt, \c BoolNodeMap, \c IntNodeMap, \c DoubleNodeMap, |
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| 84 | ///\c BoolArcMap, \c IntArcMap, \c DoubleArcMap. |
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| 85 | /// |
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| 86 | ///\note If the graph type is a dependent type, ie. the graph type depend |
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| 87 | ///on a template parameter, then use \c TEMPLATE_DIGRAPH_TYPEDEFS() |
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| 88 | ///macro. |
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| 89 | #define DIGRAPH_TYPEDEFS(Digraph) \ |
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| 90 | typedef Digraph::Node Node; \ |
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| 91 | typedef Digraph::NodeIt NodeIt; \ |
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| 92 | typedef Digraph::Arc Arc; \ |
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| 93 | typedef Digraph::ArcIt ArcIt; \ |
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| 94 | typedef Digraph::InArcIt InArcIt; \ |
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| 95 | typedef Digraph::OutArcIt OutArcIt; \ |
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| 96 | typedef Digraph::NodeMap<bool> BoolNodeMap; \ |
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| 97 | typedef Digraph::NodeMap<int> IntNodeMap; \ |
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| 98 | typedef Digraph::NodeMap<double> DoubleNodeMap; \ |
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| 99 | typedef Digraph::ArcMap<bool> BoolArcMap; \ |
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| 100 | typedef Digraph::ArcMap<int> IntArcMap; \ |
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[300] | 101 | typedef Digraph::ArcMap<double> DoubleArcMap |
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[220] | 102 | |
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[300] | 103 | ///Create convenience typedefs for the digraph types and iterators |
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[220] | 104 | |
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| 105 | ///\see DIGRAPH_TYPEDEFS |
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| 106 | /// |
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| 107 | ///\note Use this macro, if the graph type is a dependent type, |
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| 108 | ///ie. the graph type depend on a template parameter. |
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| 109 | #define TEMPLATE_DIGRAPH_TYPEDEFS(Digraph) \ |
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| 110 | typedef typename Digraph::Node Node; \ |
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| 111 | typedef typename Digraph::NodeIt NodeIt; \ |
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| 112 | typedef typename Digraph::Arc Arc; \ |
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| 113 | typedef typename Digraph::ArcIt ArcIt; \ |
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| 114 | typedef typename Digraph::InArcIt InArcIt; \ |
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| 115 | typedef typename Digraph::OutArcIt OutArcIt; \ |
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| 116 | typedef typename Digraph::template NodeMap<bool> BoolNodeMap; \ |
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| 117 | typedef typename Digraph::template NodeMap<int> IntNodeMap; \ |
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| 118 | typedef typename Digraph::template NodeMap<double> DoubleNodeMap; \ |
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| 119 | typedef typename Digraph::template ArcMap<bool> BoolArcMap; \ |
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| 120 | typedef typename Digraph::template ArcMap<int> IntArcMap; \ |
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[300] | 121 | typedef typename Digraph::template ArcMap<double> DoubleArcMap |
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[220] | 122 | |
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[300] | 123 | ///Create convenience typedefs for the graph types and iterators |
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[220] | 124 | |
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[282] | 125 | ///This \c \#define creates the same convenient type definitions as defined |
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[220] | 126 | ///by \ref DIGRAPH_TYPEDEFS(Graph) and six more, namely it creates |
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| 127 | ///\c Edge, \c EdgeIt, \c IncEdgeIt, \c BoolEdgeMap, \c IntEdgeMap, |
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| 128 | ///\c DoubleEdgeMap. |
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| 129 | /// |
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| 130 | ///\note If the graph type is a dependent type, ie. the graph type depend |
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[282] | 131 | ///on a template parameter, then use \c TEMPLATE_GRAPH_TYPEDEFS() |
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[220] | 132 | ///macro. |
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| 133 | #define GRAPH_TYPEDEFS(Graph) \ |
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| 134 | DIGRAPH_TYPEDEFS(Graph); \ |
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| 135 | typedef Graph::Edge Edge; \ |
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| 136 | typedef Graph::EdgeIt EdgeIt; \ |
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| 137 | typedef Graph::IncEdgeIt IncEdgeIt; \ |
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| 138 | typedef Graph::EdgeMap<bool> BoolEdgeMap; \ |
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| 139 | typedef Graph::EdgeMap<int> IntEdgeMap; \ |
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[300] | 140 | typedef Graph::EdgeMap<double> DoubleEdgeMap |
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[220] | 141 | |
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[300] | 142 | ///Create convenience typedefs for the graph types and iterators |
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[220] | 143 | |
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| 144 | ///\see GRAPH_TYPEDEFS |
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| 145 | /// |
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| 146 | ///\note Use this macro, if the graph type is a dependent type, |
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| 147 | ///ie. the graph type depend on a template parameter. |
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| 148 | #define TEMPLATE_GRAPH_TYPEDEFS(Graph) \ |
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| 149 | TEMPLATE_DIGRAPH_TYPEDEFS(Graph); \ |
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| 150 | typedef typename Graph::Edge Edge; \ |
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| 151 | typedef typename Graph::EdgeIt EdgeIt; \ |
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| 152 | typedef typename Graph::IncEdgeIt IncEdgeIt; \ |
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| 153 | typedef typename Graph::template EdgeMap<bool> BoolEdgeMap; \ |
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| 154 | typedef typename Graph::template EdgeMap<int> IntEdgeMap; \ |
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[300] | 155 | typedef typename Graph::template EdgeMap<double> DoubleEdgeMap |
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[220] | 156 | |
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[1187] | 157 | ///Create convenience typedefs for the bipartite graph types and iterators |
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| 158 | |
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[1194] | 159 | ///This \c \#define creates the same convenient type definitions as |
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| 160 | ///defined by \ref GRAPH_TYPEDEFS(BpGraph) and ten more, namely it |
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| 161 | ///creates \c RedNode, \c RedNodeIt, \c BoolRedNodeMap, |
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| 162 | ///\c IntRedNodeMap, \c DoubleRedNodeMap, \c BlueNode, \c BlueNodeIt, |
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| 163 | ///\c BoolBlueNodeMap, \c IntBlueNodeMap, \c DoubleBlueNodeMap. |
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[1187] | 164 | /// |
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| 165 | ///\note If the graph type is a dependent type, ie. the graph type depend |
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| 166 | ///on a template parameter, then use \c TEMPLATE_BPGRAPH_TYPEDEFS() |
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| 167 | ///macro. |
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| 168 | #define BPGRAPH_TYPEDEFS(BpGraph) \ |
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| 169 | GRAPH_TYPEDEFS(BpGraph); \ |
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| 170 | typedef BpGraph::RedNode RedNode; \ |
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[1194] | 171 | typedef BpGraph::RedNodeIt RedNodeIt; \ |
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| 172 | typedef BpGraph::RedNodeMap<bool> BoolRedNodeMap; \ |
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| 173 | typedef BpGraph::RedNodeMap<int> IntRedNodeMap; \ |
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| 174 | typedef BpGraph::RedNodeMap<double> DoubleRedNodeMap; \ |
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[1187] | 175 | typedef BpGraph::BlueNode BlueNode; \ |
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[1194] | 176 | typedef BpGraph::BlueNodeIt BlueNodeIt; \ |
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| 177 | typedef BpGraph::BlueNodeMap<bool> BoolBlueNodeMap; \ |
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| 178 | typedef BpGraph::BlueNodeMap<int> IntBlueNodeMap; \ |
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| 179 | typedef BpGraph::BlueNodeMap<double> DoubleBlueNodeMap |
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[1187] | 180 | |
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| 181 | ///Create convenience typedefs for the bipartite graph types and iterators |
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| 182 | |
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| 183 | ///\see BPGRAPH_TYPEDEFS |
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| 184 | /// |
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| 185 | ///\note Use this macro, if the graph type is a dependent type, |
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| 186 | ///ie. the graph type depend on a template parameter. |
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[1194] | 187 | #define TEMPLATE_BPGRAPH_TYPEDEFS(BpGraph) \ |
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| 188 | TEMPLATE_GRAPH_TYPEDEFS(BpGraph); \ |
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| 189 | typedef typename BpGraph::RedNode RedNode; \ |
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| 190 | typedef typename BpGraph::RedNodeIt RedNodeIt; \ |
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| 191 | typedef typename BpGraph::template RedNodeMap<bool> BoolRedNodeMap; \ |
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| 192 | typedef typename BpGraph::template RedNodeMap<int> IntRedNodeMap; \ |
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| 193 | typedef typename BpGraph::template RedNodeMap<double> DoubleRedNodeMap; \ |
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| 194 | typedef typename BpGraph::BlueNode BlueNode; \ |
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| 195 | typedef typename BpGraph::BlueNodeIt BlueNodeIt; \ |
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| 196 | typedef typename BpGraph::template BlueNodeMap<bool> BoolBlueNodeMap; \ |
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| 197 | typedef typename BpGraph::template BlueNodeMap<int> IntBlueNodeMap; \ |
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| 198 | typedef typename BpGraph::template BlueNodeMap<double> DoubleBlueNodeMap |
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[1187] | 199 | |
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[282] | 200 | /// \brief Function to count the items in a graph. |
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[220] | 201 | /// |
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[282] | 202 | /// This function counts the items (nodes, arcs etc.) in a graph. |
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| 203 | /// The complexity of the function is linear because |
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[220] | 204 | /// it iterates on all of the items. |
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| 205 | template <typename Graph, typename Item> |
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| 206 | inline int countItems(const Graph& g) { |
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| 207 | typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt; |
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| 208 | int num = 0; |
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| 209 | for (ItemIt it(g); it != INVALID; ++it) { |
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| 210 | ++num; |
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| 211 | } |
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| 212 | return num; |
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| 213 | } |
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| 214 | |
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| 215 | // Node counting: |
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| 216 | |
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| 217 | namespace _core_bits { |
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| 218 | |
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| 219 | template <typename Graph, typename Enable = void> |
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| 220 | struct CountNodesSelector { |
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| 221 | static int count(const Graph &g) { |
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| 222 | return countItems<Graph, typename Graph::Node>(g); |
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| 223 | } |
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| 224 | }; |
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| 225 | |
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| 226 | template <typename Graph> |
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| 227 | struct CountNodesSelector< |
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| 228 | Graph, typename |
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| 229 | enable_if<typename Graph::NodeNumTag, void>::type> |
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| 230 | { |
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| 231 | static int count(const Graph &g) { |
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| 232 | return g.nodeNum(); |
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| 233 | } |
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| 234 | }; |
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| 235 | } |
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| 236 | |
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| 237 | /// \brief Function to count the nodes in the graph. |
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| 238 | /// |
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| 239 | /// This function counts the nodes in the graph. |
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[282] | 240 | /// The complexity of the function is <em>O</em>(<em>n</em>), but for some |
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| 241 | /// graph structures it is specialized to run in <em>O</em>(1). |
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[220] | 242 | /// |
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[282] | 243 | /// \note If the graph contains a \c nodeNum() member function and a |
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| 244 | /// \c NodeNumTag tag then this function calls directly the member |
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[220] | 245 | /// function to query the cardinality of the node set. |
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| 246 | template <typename Graph> |
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| 247 | inline int countNodes(const Graph& g) { |
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| 248 | return _core_bits::CountNodesSelector<Graph>::count(g); |
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| 249 | } |
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| 250 | |
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[1187] | 251 | namespace _graph_utils_bits { |
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[1270] | 252 | |
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[1187] | 253 | template <typename Graph, typename Enable = void> |
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| 254 | struct CountRedNodesSelector { |
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| 255 | static int count(const Graph &g) { |
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| 256 | return countItems<Graph, typename Graph::RedNode>(g); |
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| 257 | } |
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| 258 | }; |
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| 259 | |
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| 260 | template <typename Graph> |
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| 261 | struct CountRedNodesSelector< |
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[1270] | 262 | Graph, typename |
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| 263 | enable_if<typename Graph::NodeNumTag, void>::type> |
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[1187] | 264 | { |
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| 265 | static int count(const Graph &g) { |
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| 266 | return g.redNum(); |
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| 267 | } |
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[1270] | 268 | }; |
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[1187] | 269 | } |
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| 270 | |
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| 271 | /// \brief Function to count the red nodes in the graph. |
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| 272 | /// |
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| 273 | /// This function counts the red nodes in the graph. |
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| 274 | /// The complexity of the function is O(n) but for some |
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| 275 | /// graph structures it is specialized to run in O(1). |
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| 276 | /// |
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[1270] | 277 | /// If the graph contains a \e redNum() member function and a |
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[1187] | 278 | /// \e NodeNumTag tag then this function calls directly the member |
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| 279 | /// function to query the cardinality of the node set. |
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| 280 | template <typename Graph> |
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| 281 | inline int countRedNodes(const Graph& g) { |
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| 282 | return _graph_utils_bits::CountRedNodesSelector<Graph>::count(g); |
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| 283 | } |
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| 284 | |
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| 285 | namespace _graph_utils_bits { |
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[1270] | 286 | |
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[1187] | 287 | template <typename Graph, typename Enable = void> |
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| 288 | struct CountBlueNodesSelector { |
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| 289 | static int count(const Graph &g) { |
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| 290 | return countItems<Graph, typename Graph::BlueNode>(g); |
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| 291 | } |
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| 292 | }; |
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| 293 | |
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| 294 | template <typename Graph> |
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| 295 | struct CountBlueNodesSelector< |
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[1270] | 296 | Graph, typename |
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| 297 | enable_if<typename Graph::NodeNumTag, void>::type> |
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[1187] | 298 | { |
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| 299 | static int count(const Graph &g) { |
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| 300 | return g.blueNum(); |
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| 301 | } |
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[1270] | 302 | }; |
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[1187] | 303 | } |
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| 304 | |
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| 305 | /// \brief Function to count the blue nodes in the graph. |
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| 306 | /// |
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| 307 | /// This function counts the blue nodes in the graph. |
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| 308 | /// The complexity of the function is O(n) but for some |
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| 309 | /// graph structures it is specialized to run in O(1). |
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| 310 | /// |
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[1270] | 311 | /// If the graph contains a \e blueNum() member function and a |
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[1187] | 312 | /// \e NodeNumTag tag then this function calls directly the member |
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| 313 | /// function to query the cardinality of the node set. |
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| 314 | template <typename Graph> |
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| 315 | inline int countBlueNodes(const Graph& g) { |
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| 316 | return _graph_utils_bits::CountBlueNodesSelector<Graph>::count(g); |
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| 317 | } |
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| 318 | |
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[220] | 319 | // Arc counting: |
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| 320 | |
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| 321 | namespace _core_bits { |
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| 322 | |
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| 323 | template <typename Graph, typename Enable = void> |
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| 324 | struct CountArcsSelector { |
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| 325 | static int count(const Graph &g) { |
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| 326 | return countItems<Graph, typename Graph::Arc>(g); |
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| 327 | } |
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| 328 | }; |
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| 329 | |
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| 330 | template <typename Graph> |
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| 331 | struct CountArcsSelector< |
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| 332 | Graph, |
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| 333 | typename enable_if<typename Graph::ArcNumTag, void>::type> |
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| 334 | { |
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| 335 | static int count(const Graph &g) { |
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| 336 | return g.arcNum(); |
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| 337 | } |
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| 338 | }; |
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| 339 | } |
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| 340 | |
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| 341 | /// \brief Function to count the arcs in the graph. |
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| 342 | /// |
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| 343 | /// This function counts the arcs in the graph. |
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[282] | 344 | /// The complexity of the function is <em>O</em>(<em>m</em>), but for some |
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| 345 | /// graph structures it is specialized to run in <em>O</em>(1). |
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[220] | 346 | /// |
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[282] | 347 | /// \note If the graph contains a \c arcNum() member function and a |
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| 348 | /// \c ArcNumTag tag then this function calls directly the member |
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[220] | 349 | /// function to query the cardinality of the arc set. |
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| 350 | template <typename Graph> |
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| 351 | inline int countArcs(const Graph& g) { |
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| 352 | return _core_bits::CountArcsSelector<Graph>::count(g); |
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| 353 | } |
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| 354 | |
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| 355 | // Edge counting: |
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[282] | 356 | |
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[220] | 357 | namespace _core_bits { |
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| 358 | |
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| 359 | template <typename Graph, typename Enable = void> |
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| 360 | struct CountEdgesSelector { |
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| 361 | static int count(const Graph &g) { |
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| 362 | return countItems<Graph, typename Graph::Edge>(g); |
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| 363 | } |
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| 364 | }; |
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| 365 | |
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| 366 | template <typename Graph> |
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| 367 | struct CountEdgesSelector< |
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| 368 | Graph, |
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| 369 | typename enable_if<typename Graph::EdgeNumTag, void>::type> |
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| 370 | { |
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| 371 | static int count(const Graph &g) { |
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| 372 | return g.edgeNum(); |
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| 373 | } |
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| 374 | }; |
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| 375 | } |
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| 376 | |
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| 377 | /// \brief Function to count the edges in the graph. |
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| 378 | /// |
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| 379 | /// This function counts the edges in the graph. |
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[282] | 380 | /// The complexity of the function is <em>O</em>(<em>m</em>), but for some |
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| 381 | /// graph structures it is specialized to run in <em>O</em>(1). |
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[220] | 382 | /// |
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[282] | 383 | /// \note If the graph contains a \c edgeNum() member function and a |
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| 384 | /// \c EdgeNumTag tag then this function calls directly the member |
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[220] | 385 | /// function to query the cardinality of the edge set. |
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| 386 | template <typename Graph> |
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| 387 | inline int countEdges(const Graph& g) { |
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| 388 | return _core_bits::CountEdgesSelector<Graph>::count(g); |
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| 389 | |
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| 390 | } |
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| 391 | |
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| 392 | |
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| 393 | template <typename Graph, typename DegIt> |
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| 394 | inline int countNodeDegree(const Graph& _g, const typename Graph::Node& _n) { |
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| 395 | int num = 0; |
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| 396 | for (DegIt it(_g, _n); it != INVALID; ++it) { |
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| 397 | ++num; |
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| 398 | } |
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| 399 | return num; |
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| 400 | } |
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| 401 | |
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| 402 | /// \brief Function to count the number of the out-arcs from node \c n. |
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| 403 | /// |
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| 404 | /// This function counts the number of the out-arcs from node \c n |
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[282] | 405 | /// in the graph \c g. |
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[220] | 406 | template <typename Graph> |
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[282] | 407 | inline int countOutArcs(const Graph& g, const typename Graph::Node& n) { |
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| 408 | return countNodeDegree<Graph, typename Graph::OutArcIt>(g, n); |
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[220] | 409 | } |
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| 410 | |
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| 411 | /// \brief Function to count the number of the in-arcs to node \c n. |
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| 412 | /// |
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| 413 | /// This function counts the number of the in-arcs to node \c n |
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[282] | 414 | /// in the graph \c g. |
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[220] | 415 | template <typename Graph> |
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[282] | 416 | inline int countInArcs(const Graph& g, const typename Graph::Node& n) { |
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| 417 | return countNodeDegree<Graph, typename Graph::InArcIt>(g, n); |
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[220] | 418 | } |
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| 419 | |
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| 420 | /// \brief Function to count the number of the inc-edges to node \c n. |
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| 421 | /// |
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| 422 | /// This function counts the number of the inc-edges to node \c n |
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[282] | 423 | /// in the undirected graph \c g. |
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[220] | 424 | template <typename Graph> |
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[282] | 425 | inline int countIncEdges(const Graph& g, const typename Graph::Node& n) { |
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| 426 | return countNodeDegree<Graph, typename Graph::IncEdgeIt>(g, n); |
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[220] | 427 | } |
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| 428 | |
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| 429 | namespace _core_bits { |
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| 430 | |
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| 431 | template <typename Digraph, typename Item, typename RefMap> |
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| 432 | class MapCopyBase { |
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| 433 | public: |
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| 434 | virtual void copy(const Digraph& from, const RefMap& refMap) = 0; |
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| 435 | |
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| 436 | virtual ~MapCopyBase() {} |
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| 437 | }; |
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| 438 | |
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| 439 | template <typename Digraph, typename Item, typename RefMap, |
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[282] | 440 | typename FromMap, typename ToMap> |
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[220] | 441 | class MapCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
| 442 | public: |
---|
| 443 | |
---|
[282] | 444 | MapCopy(const FromMap& map, ToMap& tmap) |
---|
| 445 | : _map(map), _tmap(tmap) {} |
---|
[220] | 446 | |
---|
| 447 | virtual void copy(const Digraph& digraph, const RefMap& refMap) { |
---|
| 448 | typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt; |
---|
| 449 | for (ItemIt it(digraph); it != INVALID; ++it) { |
---|
| 450 | _tmap.set(refMap[it], _map[it]); |
---|
| 451 | } |
---|
| 452 | } |
---|
| 453 | |
---|
| 454 | private: |
---|
[282] | 455 | const FromMap& _map; |
---|
[220] | 456 | ToMap& _tmap; |
---|
| 457 | }; |
---|
| 458 | |
---|
| 459 | template <typename Digraph, typename Item, typename RefMap, typename It> |
---|
| 460 | class ItemCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
| 461 | public: |
---|
| 462 | |
---|
[282] | 463 | ItemCopy(const Item& item, It& it) : _item(item), _it(it) {} |
---|
[220] | 464 | |
---|
| 465 | virtual void copy(const Digraph&, const RefMap& refMap) { |
---|
| 466 | _it = refMap[_item]; |
---|
| 467 | } |
---|
| 468 | |
---|
| 469 | private: |
---|
[282] | 470 | Item _item; |
---|
[220] | 471 | It& _it; |
---|
| 472 | }; |
---|
| 473 | |
---|
| 474 | template <typename Digraph, typename Item, typename RefMap, typename Ref> |
---|
| 475 | class RefCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
| 476 | public: |
---|
| 477 | |
---|
| 478 | RefCopy(Ref& map) : _map(map) {} |
---|
| 479 | |
---|
| 480 | virtual void copy(const Digraph& digraph, const RefMap& refMap) { |
---|
| 481 | typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt; |
---|
| 482 | for (ItemIt it(digraph); it != INVALID; ++it) { |
---|
| 483 | _map.set(it, refMap[it]); |
---|
| 484 | } |
---|
| 485 | } |
---|
| 486 | |
---|
| 487 | private: |
---|
| 488 | Ref& _map; |
---|
| 489 | }; |
---|
| 490 | |
---|
| 491 | template <typename Digraph, typename Item, typename RefMap, |
---|
| 492 | typename CrossRef> |
---|
| 493 | class CrossRefCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
| 494 | public: |
---|
| 495 | |
---|
| 496 | CrossRefCopy(CrossRef& cmap) : _cmap(cmap) {} |
---|
| 497 | |
---|
| 498 | virtual void copy(const Digraph& digraph, const RefMap& refMap) { |
---|
| 499 | typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt; |
---|
| 500 | for (ItemIt it(digraph); it != INVALID; ++it) { |
---|
| 501 | _cmap.set(refMap[it], it); |
---|
| 502 | } |
---|
| 503 | } |
---|
| 504 | |
---|
| 505 | private: |
---|
| 506 | CrossRef& _cmap; |
---|
| 507 | }; |
---|
| 508 | |
---|
| 509 | template <typename Digraph, typename Enable = void> |
---|
| 510 | struct DigraphCopySelector { |
---|
| 511 | template <typename From, typename NodeRefMap, typename ArcRefMap> |
---|
[282] | 512 | static void copy(const From& from, Digraph &to, |
---|
[220] | 513 | NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) { |
---|
[980] | 514 | to.clear(); |
---|
[220] | 515 | for (typename From::NodeIt it(from); it != INVALID; ++it) { |
---|
| 516 | nodeRefMap[it] = to.addNode(); |
---|
| 517 | } |
---|
| 518 | for (typename From::ArcIt it(from); it != INVALID; ++it) { |
---|
| 519 | arcRefMap[it] = to.addArc(nodeRefMap[from.source(it)], |
---|
| 520 | nodeRefMap[from.target(it)]); |
---|
| 521 | } |
---|
| 522 | } |
---|
| 523 | }; |
---|
| 524 | |
---|
| 525 | template <typename Digraph> |
---|
| 526 | struct DigraphCopySelector< |
---|
| 527 | Digraph, |
---|
| 528 | typename enable_if<typename Digraph::BuildTag, void>::type> |
---|
| 529 | { |
---|
| 530 | template <typename From, typename NodeRefMap, typename ArcRefMap> |
---|
[282] | 531 | static void copy(const From& from, Digraph &to, |
---|
[220] | 532 | NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) { |
---|
| 533 | to.build(from, nodeRefMap, arcRefMap); |
---|
| 534 | } |
---|
| 535 | }; |
---|
| 536 | |
---|
| 537 | template <typename Graph, typename Enable = void> |
---|
| 538 | struct GraphCopySelector { |
---|
| 539 | template <typename From, typename NodeRefMap, typename EdgeRefMap> |
---|
[282] | 540 | static void copy(const From& from, Graph &to, |
---|
[220] | 541 | NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) { |
---|
[980] | 542 | to.clear(); |
---|
[220] | 543 | for (typename From::NodeIt it(from); it != INVALID; ++it) { |
---|
| 544 | nodeRefMap[it] = to.addNode(); |
---|
| 545 | } |
---|
| 546 | for (typename From::EdgeIt it(from); it != INVALID; ++it) { |
---|
| 547 | edgeRefMap[it] = to.addEdge(nodeRefMap[from.u(it)], |
---|
| 548 | nodeRefMap[from.v(it)]); |
---|
| 549 | } |
---|
| 550 | } |
---|
| 551 | }; |
---|
| 552 | |
---|
| 553 | template <typename Graph> |
---|
| 554 | struct GraphCopySelector< |
---|
| 555 | Graph, |
---|
| 556 | typename enable_if<typename Graph::BuildTag, void>::type> |
---|
| 557 | { |
---|
| 558 | template <typename From, typename NodeRefMap, typename EdgeRefMap> |
---|
[282] | 559 | static void copy(const From& from, Graph &to, |
---|
[1193] | 560 | NodeRefMap& nodeRefMap, |
---|
| 561 | EdgeRefMap& edgeRefMap) { |
---|
[220] | 562 | to.build(from, nodeRefMap, edgeRefMap); |
---|
| 563 | } |
---|
| 564 | }; |
---|
| 565 | |
---|
[1190] | 566 | template <typename BpGraph, typename Enable = void> |
---|
| 567 | struct BpGraphCopySelector { |
---|
[1193] | 568 | template <typename From, typename RedNodeRefMap, |
---|
| 569 | typename BlueNodeRefMap, typename EdgeRefMap> |
---|
[1190] | 570 | static void copy(const From& from, BpGraph &to, |
---|
[1193] | 571 | RedNodeRefMap& redNodeRefMap, |
---|
| 572 | BlueNodeRefMap& blueNodeRefMap, |
---|
| 573 | EdgeRefMap& edgeRefMap) { |
---|
[1190] | 574 | to.clear(); |
---|
[1194] | 575 | for (typename From::RedNodeIt it(from); it != INVALID; ++it) { |
---|
[1193] | 576 | redNodeRefMap[it] = to.addRedNode(); |
---|
[1190] | 577 | } |
---|
[1194] | 578 | for (typename From::BlueNodeIt it(from); it != INVALID; ++it) { |
---|
[1193] | 579 | blueNodeRefMap[it] = to.addBlueNode(); |
---|
[1190] | 580 | } |
---|
| 581 | for (typename From::EdgeIt it(from); it != INVALID; ++it) { |
---|
[1193] | 582 | edgeRefMap[it] = to.addEdge(redNodeRefMap[from.redNode(it)], |
---|
| 583 | blueNodeRefMap[from.blueNode(it)]); |
---|
[1190] | 584 | } |
---|
| 585 | } |
---|
| 586 | }; |
---|
| 587 | |
---|
| 588 | template <typename BpGraph> |
---|
| 589 | struct BpGraphCopySelector< |
---|
| 590 | BpGraph, |
---|
| 591 | typename enable_if<typename BpGraph::BuildTag, void>::type> |
---|
| 592 | { |
---|
[1193] | 593 | template <typename From, typename RedNodeRefMap, |
---|
| 594 | typename BlueNodeRefMap, typename EdgeRefMap> |
---|
[1190] | 595 | static void copy(const From& from, BpGraph &to, |
---|
[1193] | 596 | RedNodeRefMap& redNodeRefMap, |
---|
| 597 | BlueNodeRefMap& blueNodeRefMap, |
---|
| 598 | EdgeRefMap& edgeRefMap) { |
---|
| 599 | to.build(from, redNodeRefMap, blueNodeRefMap, edgeRefMap); |
---|
[1190] | 600 | } |
---|
| 601 | }; |
---|
| 602 | |
---|
[220] | 603 | } |
---|
| 604 | |
---|
[1023] | 605 | /// \brief Check whether a graph is undirected. |
---|
[966] | 606 | /// |
---|
| 607 | /// This function returns \c true if the given graph is undirected. |
---|
| 608 | #ifdef DOXYGEN |
---|
| 609 | template <typename GR> |
---|
| 610 | bool undirected(const GR& g) { return false; } |
---|
| 611 | #else |
---|
| 612 | template <typename GR> |
---|
| 613 | typename enable_if<UndirectedTagIndicator<GR>, bool>::type |
---|
| 614 | undirected(const GR&) { |
---|
| 615 | return true; |
---|
| 616 | } |
---|
| 617 | template <typename GR> |
---|
| 618 | typename disable_if<UndirectedTagIndicator<GR>, bool>::type |
---|
| 619 | undirected(const GR&) { |
---|
| 620 | return false; |
---|
| 621 | } |
---|
| 622 | #endif |
---|
| 623 | |
---|
[220] | 624 | /// \brief Class to copy a digraph. |
---|
| 625 | /// |
---|
| 626 | /// Class to copy a digraph to another digraph (duplicate a digraph). The |
---|
[282] | 627 | /// simplest way of using it is through the \c digraphCopy() function. |
---|
[220] | 628 | /// |
---|
[282] | 629 | /// This class not only make a copy of a digraph, but it can create |
---|
[220] | 630 | /// references and cross references between the nodes and arcs of |
---|
[282] | 631 | /// the two digraphs, and it can copy maps to use with the newly created |
---|
| 632 | /// digraph. |
---|
[220] | 633 | /// |
---|
[282] | 634 | /// To make a copy from a digraph, first an instance of DigraphCopy |
---|
| 635 | /// should be created, then the data belongs to the digraph should |
---|
[220] | 636 | /// assigned to copy. In the end, the \c run() member should be |
---|
| 637 | /// called. |
---|
| 638 | /// |
---|
[282] | 639 | /// The next code copies a digraph with several data: |
---|
[220] | 640 | ///\code |
---|
[282] | 641 | /// DigraphCopy<OrigGraph, NewGraph> cg(orig_graph, new_graph); |
---|
| 642 | /// // Create references for the nodes |
---|
[220] | 643 | /// OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph); |
---|
[282] | 644 | /// cg.nodeRef(nr); |
---|
| 645 | /// // Create cross references (inverse) for the arcs |
---|
[220] | 646 | /// NewGraph::ArcMap<OrigGraph::Arc> acr(new_graph); |
---|
[282] | 647 | /// cg.arcCrossRef(acr); |
---|
| 648 | /// // Copy an arc map |
---|
[220] | 649 | /// OrigGraph::ArcMap<double> oamap(orig_graph); |
---|
| 650 | /// NewGraph::ArcMap<double> namap(new_graph); |
---|
[282] | 651 | /// cg.arcMap(oamap, namap); |
---|
| 652 | /// // Copy a node |
---|
[220] | 653 | /// OrigGraph::Node on; |
---|
| 654 | /// NewGraph::Node nn; |
---|
[282] | 655 | /// cg.node(on, nn); |
---|
| 656 | /// // Execute copying |
---|
| 657 | /// cg.run(); |
---|
[220] | 658 | ///\endcode |
---|
[282] | 659 | template <typename From, typename To> |
---|
[220] | 660 | class DigraphCopy { |
---|
| 661 | private: |
---|
| 662 | |
---|
| 663 | typedef typename From::Node Node; |
---|
| 664 | typedef typename From::NodeIt NodeIt; |
---|
| 665 | typedef typename From::Arc Arc; |
---|
| 666 | typedef typename From::ArcIt ArcIt; |
---|
| 667 | |
---|
| 668 | typedef typename To::Node TNode; |
---|
| 669 | typedef typename To::Arc TArc; |
---|
| 670 | |
---|
| 671 | typedef typename From::template NodeMap<TNode> NodeRefMap; |
---|
| 672 | typedef typename From::template ArcMap<TArc> ArcRefMap; |
---|
| 673 | |
---|
| 674 | public: |
---|
| 675 | |
---|
[282] | 676 | /// \brief Constructor of DigraphCopy. |
---|
[220] | 677 | /// |
---|
[282] | 678 | /// Constructor of DigraphCopy for copying the content of the |
---|
| 679 | /// \c from digraph into the \c to digraph. |
---|
| 680 | DigraphCopy(const From& from, To& to) |
---|
[220] | 681 | : _from(from), _to(to) {} |
---|
| 682 | |
---|
[282] | 683 | /// \brief Destructor of DigraphCopy |
---|
[220] | 684 | /// |
---|
[282] | 685 | /// Destructor of DigraphCopy. |
---|
[220] | 686 | ~DigraphCopy() { |
---|
| 687 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
| 688 | delete _node_maps[i]; |
---|
| 689 | } |
---|
| 690 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
| 691 | delete _arc_maps[i]; |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | } |
---|
| 695 | |
---|
[282] | 696 | /// \brief Copy the node references into the given map. |
---|
[220] | 697 | /// |
---|
[282] | 698 | /// This function copies the node references into the given map. |
---|
| 699 | /// The parameter should be a map, whose key type is the Node type of |
---|
| 700 | /// the source digraph, while the value type is the Node type of the |
---|
| 701 | /// destination digraph. |
---|
[220] | 702 | template <typename NodeRef> |
---|
| 703 | DigraphCopy& nodeRef(NodeRef& map) { |
---|
| 704 | _node_maps.push_back(new _core_bits::RefCopy<From, Node, |
---|
| 705 | NodeRefMap, NodeRef>(map)); |
---|
| 706 | return *this; |
---|
| 707 | } |
---|
| 708 | |
---|
[282] | 709 | /// \brief Copy the node cross references into the given map. |
---|
[220] | 710 | /// |
---|
[282] | 711 | /// This function copies the node cross references (reverse references) |
---|
| 712 | /// into the given map. The parameter should be a map, whose key type |
---|
| 713 | /// is the Node type of the destination digraph, while the value type is |
---|
| 714 | /// the Node type of the source digraph. |
---|
[220] | 715 | template <typename NodeCrossRef> |
---|
| 716 | DigraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
| 717 | _node_maps.push_back(new _core_bits::CrossRefCopy<From, Node, |
---|
| 718 | NodeRefMap, NodeCrossRef>(map)); |
---|
| 719 | return *this; |
---|
| 720 | } |
---|
| 721 | |
---|
[282] | 722 | /// \brief Make a copy of the given node map. |
---|
[220] | 723 | /// |
---|
[282] | 724 | /// This function makes a copy of the given node map for the newly |
---|
| 725 | /// created digraph. |
---|
| 726 | /// The key type of the new map \c tmap should be the Node type of the |
---|
| 727 | /// destination digraph, and the key type of the original map \c map |
---|
| 728 | /// should be the Node type of the source digraph. |
---|
| 729 | template <typename FromMap, typename ToMap> |
---|
| 730 | DigraphCopy& nodeMap(const FromMap& map, ToMap& tmap) { |
---|
[220] | 731 | _node_maps.push_back(new _core_bits::MapCopy<From, Node, |
---|
[282] | 732 | NodeRefMap, FromMap, ToMap>(map, tmap)); |
---|
[220] | 733 | return *this; |
---|
| 734 | } |
---|
| 735 | |
---|
| 736 | /// \brief Make a copy of the given node. |
---|
| 737 | /// |
---|
[282] | 738 | /// This function makes a copy of the given node. |
---|
| 739 | DigraphCopy& node(const Node& node, TNode& tnode) { |
---|
[220] | 740 | _node_maps.push_back(new _core_bits::ItemCopy<From, Node, |
---|
[282] | 741 | NodeRefMap, TNode>(node, tnode)); |
---|
[220] | 742 | return *this; |
---|
| 743 | } |
---|
| 744 | |
---|
[282] | 745 | /// \brief Copy the arc references into the given map. |
---|
[220] | 746 | /// |
---|
[282] | 747 | /// This function copies the arc references into the given map. |
---|
| 748 | /// The parameter should be a map, whose key type is the Arc type of |
---|
| 749 | /// the source digraph, while the value type is the Arc type of the |
---|
| 750 | /// destination digraph. |
---|
[220] | 751 | template <typename ArcRef> |
---|
| 752 | DigraphCopy& arcRef(ArcRef& map) { |
---|
| 753 | _arc_maps.push_back(new _core_bits::RefCopy<From, Arc, |
---|
| 754 | ArcRefMap, ArcRef>(map)); |
---|
| 755 | return *this; |
---|
| 756 | } |
---|
| 757 | |
---|
[282] | 758 | /// \brief Copy the arc cross references into the given map. |
---|
[220] | 759 | /// |
---|
[282] | 760 | /// This function copies the arc cross references (reverse references) |
---|
| 761 | /// into the given map. The parameter should be a map, whose key type |
---|
| 762 | /// is the Arc type of the destination digraph, while the value type is |
---|
| 763 | /// the Arc type of the source digraph. |
---|
[220] | 764 | template <typename ArcCrossRef> |
---|
| 765 | DigraphCopy& arcCrossRef(ArcCrossRef& map) { |
---|
| 766 | _arc_maps.push_back(new _core_bits::CrossRefCopy<From, Arc, |
---|
| 767 | ArcRefMap, ArcCrossRef>(map)); |
---|
| 768 | return *this; |
---|
| 769 | } |
---|
| 770 | |
---|
[282] | 771 | /// \brief Make a copy of the given arc map. |
---|
[220] | 772 | /// |
---|
[282] | 773 | /// This function makes a copy of the given arc map for the newly |
---|
| 774 | /// created digraph. |
---|
| 775 | /// The key type of the new map \c tmap should be the Arc type of the |
---|
| 776 | /// destination digraph, and the key type of the original map \c map |
---|
| 777 | /// should be the Arc type of the source digraph. |
---|
| 778 | template <typename FromMap, typename ToMap> |
---|
| 779 | DigraphCopy& arcMap(const FromMap& map, ToMap& tmap) { |
---|
[220] | 780 | _arc_maps.push_back(new _core_bits::MapCopy<From, Arc, |
---|
[282] | 781 | ArcRefMap, FromMap, ToMap>(map, tmap)); |
---|
[220] | 782 | return *this; |
---|
| 783 | } |
---|
| 784 | |
---|
| 785 | /// \brief Make a copy of the given arc. |
---|
| 786 | /// |
---|
[282] | 787 | /// This function makes a copy of the given arc. |
---|
| 788 | DigraphCopy& arc(const Arc& arc, TArc& tarc) { |
---|
[220] | 789 | _arc_maps.push_back(new _core_bits::ItemCopy<From, Arc, |
---|
[282] | 790 | ArcRefMap, TArc>(arc, tarc)); |
---|
[220] | 791 | return *this; |
---|
| 792 | } |
---|
| 793 | |
---|
[282] | 794 | /// \brief Execute copying. |
---|
[220] | 795 | /// |
---|
[282] | 796 | /// This function executes the copying of the digraph along with the |
---|
| 797 | /// copying of the assigned data. |
---|
[220] | 798 | void run() { |
---|
| 799 | NodeRefMap nodeRefMap(_from); |
---|
| 800 | ArcRefMap arcRefMap(_from); |
---|
| 801 | _core_bits::DigraphCopySelector<To>:: |
---|
[282] | 802 | copy(_from, _to, nodeRefMap, arcRefMap); |
---|
[220] | 803 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
| 804 | _node_maps[i]->copy(_from, nodeRefMap); |
---|
| 805 | } |
---|
| 806 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
| 807 | _arc_maps[i]->copy(_from, arcRefMap); |
---|
| 808 | } |
---|
| 809 | } |
---|
| 810 | |
---|
| 811 | protected: |
---|
| 812 | |
---|
| 813 | const From& _from; |
---|
| 814 | To& _to; |
---|
| 815 | |
---|
| 816 | std::vector<_core_bits::MapCopyBase<From, Node, NodeRefMap>* > |
---|
[282] | 817 | _node_maps; |
---|
[220] | 818 | |
---|
| 819 | std::vector<_core_bits::MapCopyBase<From, Arc, ArcRefMap>* > |
---|
[282] | 820 | _arc_maps; |
---|
[220] | 821 | |
---|
| 822 | }; |
---|
| 823 | |
---|
| 824 | /// \brief Copy a digraph to another digraph. |
---|
| 825 | /// |
---|
[282] | 826 | /// This function copies a digraph to another digraph. |
---|
| 827 | /// The complete usage of it is detailed in the DigraphCopy class, but |
---|
| 828 | /// a short example shows a basic work: |
---|
[220] | 829 | ///\code |
---|
[282] | 830 | /// digraphCopy(src, trg).nodeRef(nr).arcCrossRef(acr).run(); |
---|
[220] | 831 | ///\endcode |
---|
| 832 | /// |
---|
| 833 | /// After the copy the \c nr map will contain the mapping from the |
---|
| 834 | /// nodes of the \c from digraph to the nodes of the \c to digraph and |
---|
[282] | 835 | /// \c acr will contain the mapping from the arcs of the \c to digraph |
---|
[220] | 836 | /// to the arcs of the \c from digraph. |
---|
| 837 | /// |
---|
| 838 | /// \see DigraphCopy |
---|
[282] | 839 | template <typename From, typename To> |
---|
| 840 | DigraphCopy<From, To> digraphCopy(const From& from, To& to) { |
---|
| 841 | return DigraphCopy<From, To>(from, to); |
---|
[220] | 842 | } |
---|
| 843 | |
---|
| 844 | /// \brief Class to copy a graph. |
---|
| 845 | /// |
---|
| 846 | /// Class to copy a graph to another graph (duplicate a graph). The |
---|
[282] | 847 | /// simplest way of using it is through the \c graphCopy() function. |
---|
[220] | 848 | /// |
---|
[282] | 849 | /// This class not only make a copy of a graph, but it can create |
---|
[220] | 850 | /// references and cross references between the nodes, edges and arcs of |
---|
[282] | 851 | /// the two graphs, and it can copy maps for using with the newly created |
---|
| 852 | /// graph. |
---|
[220] | 853 | /// |
---|
| 854 | /// To make a copy from a graph, first an instance of GraphCopy |
---|
| 855 | /// should be created, then the data belongs to the graph should |
---|
| 856 | /// assigned to copy. In the end, the \c run() member should be |
---|
| 857 | /// called. |
---|
| 858 | /// |
---|
| 859 | /// The next code copies a graph with several data: |
---|
| 860 | ///\code |
---|
[282] | 861 | /// GraphCopy<OrigGraph, NewGraph> cg(orig_graph, new_graph); |
---|
| 862 | /// // Create references for the nodes |
---|
[220] | 863 | /// OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph); |
---|
[282] | 864 | /// cg.nodeRef(nr); |
---|
| 865 | /// // Create cross references (inverse) for the edges |
---|
| 866 | /// NewGraph::EdgeMap<OrigGraph::Edge> ecr(new_graph); |
---|
| 867 | /// cg.edgeCrossRef(ecr); |
---|
| 868 | /// // Copy an edge map |
---|
| 869 | /// OrigGraph::EdgeMap<double> oemap(orig_graph); |
---|
| 870 | /// NewGraph::EdgeMap<double> nemap(new_graph); |
---|
| 871 | /// cg.edgeMap(oemap, nemap); |
---|
| 872 | /// // Copy a node |
---|
[220] | 873 | /// OrigGraph::Node on; |
---|
| 874 | /// NewGraph::Node nn; |
---|
[282] | 875 | /// cg.node(on, nn); |
---|
| 876 | /// // Execute copying |
---|
| 877 | /// cg.run(); |
---|
[220] | 878 | ///\endcode |
---|
[282] | 879 | template <typename From, typename To> |
---|
[220] | 880 | class GraphCopy { |
---|
| 881 | private: |
---|
| 882 | |
---|
| 883 | typedef typename From::Node Node; |
---|
| 884 | typedef typename From::NodeIt NodeIt; |
---|
| 885 | typedef typename From::Arc Arc; |
---|
| 886 | typedef typename From::ArcIt ArcIt; |
---|
| 887 | typedef typename From::Edge Edge; |
---|
| 888 | typedef typename From::EdgeIt EdgeIt; |
---|
| 889 | |
---|
| 890 | typedef typename To::Node TNode; |
---|
| 891 | typedef typename To::Arc TArc; |
---|
| 892 | typedef typename To::Edge TEdge; |
---|
| 893 | |
---|
| 894 | typedef typename From::template NodeMap<TNode> NodeRefMap; |
---|
| 895 | typedef typename From::template EdgeMap<TEdge> EdgeRefMap; |
---|
| 896 | |
---|
| 897 | struct ArcRefMap { |
---|
[282] | 898 | ArcRefMap(const From& from, const To& to, |
---|
[220] | 899 | const EdgeRefMap& edge_ref, const NodeRefMap& node_ref) |
---|
[282] | 900 | : _from(from), _to(to), |
---|
[220] | 901 | _edge_ref(edge_ref), _node_ref(node_ref) {} |
---|
| 902 | |
---|
| 903 | typedef typename From::Arc Key; |
---|
| 904 | typedef typename To::Arc Value; |
---|
| 905 | |
---|
| 906 | Value operator[](const Key& key) const { |
---|
| 907 | bool forward = _from.u(key) != _from.v(key) ? |
---|
| 908 | _node_ref[_from.source(key)] == |
---|
| 909 | _to.source(_to.direct(_edge_ref[key], true)) : |
---|
| 910 | _from.direction(key); |
---|
| 911 | return _to.direct(_edge_ref[key], forward); |
---|
| 912 | } |
---|
| 913 | |
---|
[282] | 914 | const From& _from; |
---|
[220] | 915 | const To& _to; |
---|
| 916 | const EdgeRefMap& _edge_ref; |
---|
| 917 | const NodeRefMap& _node_ref; |
---|
| 918 | }; |
---|
| 919 | |
---|
| 920 | public: |
---|
| 921 | |
---|
[282] | 922 | /// \brief Constructor of GraphCopy. |
---|
[220] | 923 | /// |
---|
[282] | 924 | /// Constructor of GraphCopy for copying the content of the |
---|
| 925 | /// \c from graph into the \c to graph. |
---|
| 926 | GraphCopy(const From& from, To& to) |
---|
[220] | 927 | : _from(from), _to(to) {} |
---|
| 928 | |
---|
[282] | 929 | /// \brief Destructor of GraphCopy |
---|
[220] | 930 | /// |
---|
[282] | 931 | /// Destructor of GraphCopy. |
---|
[220] | 932 | ~GraphCopy() { |
---|
| 933 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
| 934 | delete _node_maps[i]; |
---|
| 935 | } |
---|
| 936 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
| 937 | delete _arc_maps[i]; |
---|
| 938 | } |
---|
| 939 | for (int i = 0; i < int(_edge_maps.size()); ++i) { |
---|
| 940 | delete _edge_maps[i]; |
---|
| 941 | } |
---|
| 942 | } |
---|
| 943 | |
---|
[282] | 944 | /// \brief Copy the node references into the given map. |
---|
[220] | 945 | /// |
---|
[282] | 946 | /// This function copies the node references into the given map. |
---|
| 947 | /// The parameter should be a map, whose key type is the Node type of |
---|
| 948 | /// the source graph, while the value type is the Node type of the |
---|
| 949 | /// destination graph. |
---|
[220] | 950 | template <typename NodeRef> |
---|
| 951 | GraphCopy& nodeRef(NodeRef& map) { |
---|
| 952 | _node_maps.push_back(new _core_bits::RefCopy<From, Node, |
---|
| 953 | NodeRefMap, NodeRef>(map)); |
---|
| 954 | return *this; |
---|
| 955 | } |
---|
| 956 | |
---|
[282] | 957 | /// \brief Copy the node cross references into the given map. |
---|
[220] | 958 | /// |
---|
[282] | 959 | /// This function copies the node cross references (reverse references) |
---|
| 960 | /// into the given map. The parameter should be a map, whose key type |
---|
| 961 | /// is the Node type of the destination graph, while the value type is |
---|
| 962 | /// the Node type of the source graph. |
---|
[220] | 963 | template <typename NodeCrossRef> |
---|
| 964 | GraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
| 965 | _node_maps.push_back(new _core_bits::CrossRefCopy<From, Node, |
---|
| 966 | NodeRefMap, NodeCrossRef>(map)); |
---|
| 967 | return *this; |
---|
| 968 | } |
---|
| 969 | |
---|
[282] | 970 | /// \brief Make a copy of the given node map. |
---|
[220] | 971 | /// |
---|
[282] | 972 | /// This function makes a copy of the given node map for the newly |
---|
| 973 | /// created graph. |
---|
| 974 | /// The key type of the new map \c tmap should be the Node type of the |
---|
| 975 | /// destination graph, and the key type of the original map \c map |
---|
| 976 | /// should be the Node type of the source graph. |
---|
| 977 | template <typename FromMap, typename ToMap> |
---|
| 978 | GraphCopy& nodeMap(const FromMap& map, ToMap& tmap) { |
---|
[220] | 979 | _node_maps.push_back(new _core_bits::MapCopy<From, Node, |
---|
[282] | 980 | NodeRefMap, FromMap, ToMap>(map, tmap)); |
---|
[220] | 981 | return *this; |
---|
| 982 | } |
---|
| 983 | |
---|
| 984 | /// \brief Make a copy of the given node. |
---|
| 985 | /// |
---|
[282] | 986 | /// This function makes a copy of the given node. |
---|
| 987 | GraphCopy& node(const Node& node, TNode& tnode) { |
---|
[220] | 988 | _node_maps.push_back(new _core_bits::ItemCopy<From, Node, |
---|
[282] | 989 | NodeRefMap, TNode>(node, tnode)); |
---|
[220] | 990 | return *this; |
---|
| 991 | } |
---|
| 992 | |
---|
[282] | 993 | /// \brief Copy the arc references into the given map. |
---|
[220] | 994 | /// |
---|
[282] | 995 | /// This function copies the arc references into the given map. |
---|
| 996 | /// The parameter should be a map, whose key type is the Arc type of |
---|
| 997 | /// the source graph, while the value type is the Arc type of the |
---|
| 998 | /// destination graph. |
---|
[220] | 999 | template <typename ArcRef> |
---|
| 1000 | GraphCopy& arcRef(ArcRef& map) { |
---|
| 1001 | _arc_maps.push_back(new _core_bits::RefCopy<From, Arc, |
---|
| 1002 | ArcRefMap, ArcRef>(map)); |
---|
| 1003 | return *this; |
---|
| 1004 | } |
---|
| 1005 | |
---|
[282] | 1006 | /// \brief Copy the arc cross references into the given map. |
---|
[220] | 1007 | /// |
---|
[282] | 1008 | /// This function copies the arc cross references (reverse references) |
---|
| 1009 | /// into the given map. The parameter should be a map, whose key type |
---|
| 1010 | /// is the Arc type of the destination graph, while the value type is |
---|
| 1011 | /// the Arc type of the source graph. |
---|
[220] | 1012 | template <typename ArcCrossRef> |
---|
| 1013 | GraphCopy& arcCrossRef(ArcCrossRef& map) { |
---|
| 1014 | _arc_maps.push_back(new _core_bits::CrossRefCopy<From, Arc, |
---|
| 1015 | ArcRefMap, ArcCrossRef>(map)); |
---|
| 1016 | return *this; |
---|
| 1017 | } |
---|
| 1018 | |
---|
[282] | 1019 | /// \brief Make a copy of the given arc map. |
---|
[220] | 1020 | /// |
---|
[282] | 1021 | /// This function makes a copy of the given arc map for the newly |
---|
| 1022 | /// created graph. |
---|
| 1023 | /// The key type of the new map \c tmap should be the Arc type of the |
---|
| 1024 | /// destination graph, and the key type of the original map \c map |
---|
| 1025 | /// should be the Arc type of the source graph. |
---|
| 1026 | template <typename FromMap, typename ToMap> |
---|
| 1027 | GraphCopy& arcMap(const FromMap& map, ToMap& tmap) { |
---|
[220] | 1028 | _arc_maps.push_back(new _core_bits::MapCopy<From, Arc, |
---|
[282] | 1029 | ArcRefMap, FromMap, ToMap>(map, tmap)); |
---|
[220] | 1030 | return *this; |
---|
| 1031 | } |
---|
| 1032 | |
---|
| 1033 | /// \brief Make a copy of the given arc. |
---|
| 1034 | /// |
---|
[282] | 1035 | /// This function makes a copy of the given arc. |
---|
| 1036 | GraphCopy& arc(const Arc& arc, TArc& tarc) { |
---|
[220] | 1037 | _arc_maps.push_back(new _core_bits::ItemCopy<From, Arc, |
---|
[282] | 1038 | ArcRefMap, TArc>(arc, tarc)); |
---|
[220] | 1039 | return *this; |
---|
| 1040 | } |
---|
| 1041 | |
---|
[282] | 1042 | /// \brief Copy the edge references into the given map. |
---|
[220] | 1043 | /// |
---|
[282] | 1044 | /// This function copies the edge references into the given map. |
---|
| 1045 | /// The parameter should be a map, whose key type is the Edge type of |
---|
| 1046 | /// the source graph, while the value type is the Edge type of the |
---|
| 1047 | /// destination graph. |
---|
[220] | 1048 | template <typename EdgeRef> |
---|
| 1049 | GraphCopy& edgeRef(EdgeRef& map) { |
---|
| 1050 | _edge_maps.push_back(new _core_bits::RefCopy<From, Edge, |
---|
| 1051 | EdgeRefMap, EdgeRef>(map)); |
---|
| 1052 | return *this; |
---|
| 1053 | } |
---|
| 1054 | |
---|
[282] | 1055 | /// \brief Copy the edge cross references into the given map. |
---|
[220] | 1056 | /// |
---|
[282] | 1057 | /// This function copies the edge cross references (reverse references) |
---|
| 1058 | /// into the given map. The parameter should be a map, whose key type |
---|
| 1059 | /// is the Edge type of the destination graph, while the value type is |
---|
| 1060 | /// the Edge type of the source graph. |
---|
[220] | 1061 | template <typename EdgeCrossRef> |
---|
| 1062 | GraphCopy& edgeCrossRef(EdgeCrossRef& map) { |
---|
| 1063 | _edge_maps.push_back(new _core_bits::CrossRefCopy<From, |
---|
| 1064 | Edge, EdgeRefMap, EdgeCrossRef>(map)); |
---|
| 1065 | return *this; |
---|
| 1066 | } |
---|
| 1067 | |
---|
[282] | 1068 | /// \brief Make a copy of the given edge map. |
---|
[220] | 1069 | /// |
---|
[282] | 1070 | /// This function makes a copy of the given edge map for the newly |
---|
| 1071 | /// created graph. |
---|
| 1072 | /// The key type of the new map \c tmap should be the Edge type of the |
---|
| 1073 | /// destination graph, and the key type of the original map \c map |
---|
| 1074 | /// should be the Edge type of the source graph. |
---|
| 1075 | template <typename FromMap, typename ToMap> |
---|
| 1076 | GraphCopy& edgeMap(const FromMap& map, ToMap& tmap) { |
---|
[220] | 1077 | _edge_maps.push_back(new _core_bits::MapCopy<From, Edge, |
---|
[282] | 1078 | EdgeRefMap, FromMap, ToMap>(map, tmap)); |
---|
[220] | 1079 | return *this; |
---|
| 1080 | } |
---|
| 1081 | |
---|
| 1082 | /// \brief Make a copy of the given edge. |
---|
| 1083 | /// |
---|
[282] | 1084 | /// This function makes a copy of the given edge. |
---|
| 1085 | GraphCopy& edge(const Edge& edge, TEdge& tedge) { |
---|
[220] | 1086 | _edge_maps.push_back(new _core_bits::ItemCopy<From, Edge, |
---|
[282] | 1087 | EdgeRefMap, TEdge>(edge, tedge)); |
---|
[220] | 1088 | return *this; |
---|
| 1089 | } |
---|
| 1090 | |
---|
[282] | 1091 | /// \brief Execute copying. |
---|
[220] | 1092 | /// |
---|
[282] | 1093 | /// This function executes the copying of the graph along with the |
---|
| 1094 | /// copying of the assigned data. |
---|
[220] | 1095 | void run() { |
---|
| 1096 | NodeRefMap nodeRefMap(_from); |
---|
| 1097 | EdgeRefMap edgeRefMap(_from); |
---|
[282] | 1098 | ArcRefMap arcRefMap(_from, _to, edgeRefMap, nodeRefMap); |
---|
[220] | 1099 | _core_bits::GraphCopySelector<To>:: |
---|
[282] | 1100 | copy(_from, _to, nodeRefMap, edgeRefMap); |
---|
[220] | 1101 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
| 1102 | _node_maps[i]->copy(_from, nodeRefMap); |
---|
| 1103 | } |
---|
| 1104 | for (int i = 0; i < int(_edge_maps.size()); ++i) { |
---|
| 1105 | _edge_maps[i]->copy(_from, edgeRefMap); |
---|
| 1106 | } |
---|
| 1107 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
| 1108 | _arc_maps[i]->copy(_from, arcRefMap); |
---|
| 1109 | } |
---|
| 1110 | } |
---|
| 1111 | |
---|
| 1112 | private: |
---|
| 1113 | |
---|
| 1114 | const From& _from; |
---|
| 1115 | To& _to; |
---|
| 1116 | |
---|
| 1117 | std::vector<_core_bits::MapCopyBase<From, Node, NodeRefMap>* > |
---|
[282] | 1118 | _node_maps; |
---|
[220] | 1119 | |
---|
| 1120 | std::vector<_core_bits::MapCopyBase<From, Arc, ArcRefMap>* > |
---|
[282] | 1121 | _arc_maps; |
---|
[220] | 1122 | |
---|
| 1123 | std::vector<_core_bits::MapCopyBase<From, Edge, EdgeRefMap>* > |
---|
[282] | 1124 | _edge_maps; |
---|
[220] | 1125 | |
---|
| 1126 | }; |
---|
| 1127 | |
---|
| 1128 | /// \brief Copy a graph to another graph. |
---|
| 1129 | /// |
---|
[282] | 1130 | /// This function copies a graph to another graph. |
---|
| 1131 | /// The complete usage of it is detailed in the GraphCopy class, |
---|
| 1132 | /// but a short example shows a basic work: |
---|
[220] | 1133 | ///\code |
---|
[282] | 1134 | /// graphCopy(src, trg).nodeRef(nr).edgeCrossRef(ecr).run(); |
---|
[220] | 1135 | ///\endcode |
---|
| 1136 | /// |
---|
| 1137 | /// After the copy the \c nr map will contain the mapping from the |
---|
| 1138 | /// nodes of the \c from graph to the nodes of the \c to graph and |
---|
[282] | 1139 | /// \c ecr will contain the mapping from the edges of the \c to graph |
---|
| 1140 | /// to the edges of the \c from graph. |
---|
[220] | 1141 | /// |
---|
| 1142 | /// \see GraphCopy |
---|
[282] | 1143 | template <typename From, typename To> |
---|
| 1144 | GraphCopy<From, To> |
---|
| 1145 | graphCopy(const From& from, To& to) { |
---|
| 1146 | return GraphCopy<From, To>(from, to); |
---|
[220] | 1147 | } |
---|
| 1148 | |
---|
[1190] | 1149 | /// \brief Class to copy a bipartite graph. |
---|
| 1150 | /// |
---|
| 1151 | /// Class to copy a bipartite graph to another graph (duplicate a |
---|
| 1152 | /// graph). The simplest way of using it is through the |
---|
| 1153 | /// \c bpGraphCopy() function. |
---|
| 1154 | /// |
---|
| 1155 | /// This class not only make a copy of a bipartite graph, but it can |
---|
| 1156 | /// create references and cross references between the nodes, edges |
---|
| 1157 | /// and arcs of the two graphs, and it can copy maps for using with |
---|
| 1158 | /// the newly created graph. |
---|
| 1159 | /// |
---|
| 1160 | /// To make a copy from a graph, first an instance of BpGraphCopy |
---|
| 1161 | /// should be created, then the data belongs to the graph should |
---|
| 1162 | /// assigned to copy. In the end, the \c run() member should be |
---|
| 1163 | /// called. |
---|
| 1164 | /// |
---|
| 1165 | /// The next code copies a graph with several data: |
---|
| 1166 | ///\code |
---|
| 1167 | /// BpGraphCopy<OrigBpGraph, NewBpGraph> cg(orig_graph, new_graph); |
---|
| 1168 | /// // Create references for the nodes |
---|
| 1169 | /// OrigBpGraph::NodeMap<NewBpGraph::Node> nr(orig_graph); |
---|
| 1170 | /// cg.nodeRef(nr); |
---|
| 1171 | /// // Create cross references (inverse) for the edges |
---|
| 1172 | /// NewBpGraph::EdgeMap<OrigBpGraph::Edge> ecr(new_graph); |
---|
| 1173 | /// cg.edgeCrossRef(ecr); |
---|
[1194] | 1174 | /// // Copy a red node map |
---|
| 1175 | /// OrigBpGraph::RedNodeMap<double> ormap(orig_graph); |
---|
| 1176 | /// NewBpGraph::RedNodeMap<double> nrmap(new_graph); |
---|
| 1177 | /// cg.redNodeMap(ormap, nrmap); |
---|
[1190] | 1178 | /// // Copy a node |
---|
| 1179 | /// OrigBpGraph::Node on; |
---|
| 1180 | /// NewBpGraph::Node nn; |
---|
| 1181 | /// cg.node(on, nn); |
---|
| 1182 | /// // Execute copying |
---|
| 1183 | /// cg.run(); |
---|
| 1184 | ///\endcode |
---|
| 1185 | template <typename From, typename To> |
---|
| 1186 | class BpGraphCopy { |
---|
| 1187 | private: |
---|
| 1188 | |
---|
| 1189 | typedef typename From::Node Node; |
---|
| 1190 | typedef typename From::RedNode RedNode; |
---|
| 1191 | typedef typename From::BlueNode BlueNode; |
---|
| 1192 | typedef typename From::NodeIt NodeIt; |
---|
| 1193 | typedef typename From::Arc Arc; |
---|
| 1194 | typedef typename From::ArcIt ArcIt; |
---|
| 1195 | typedef typename From::Edge Edge; |
---|
| 1196 | typedef typename From::EdgeIt EdgeIt; |
---|
| 1197 | |
---|
| 1198 | typedef typename To::Node TNode; |
---|
[1193] | 1199 | typedef typename To::RedNode TRedNode; |
---|
| 1200 | typedef typename To::BlueNode TBlueNode; |
---|
[1190] | 1201 | typedef typename To::Arc TArc; |
---|
| 1202 | typedef typename To::Edge TEdge; |
---|
| 1203 | |
---|
[1194] | 1204 | typedef typename From::template RedNodeMap<TRedNode> RedNodeRefMap; |
---|
| 1205 | typedef typename From::template BlueNodeMap<TBlueNode> BlueNodeRefMap; |
---|
[1190] | 1206 | typedef typename From::template EdgeMap<TEdge> EdgeRefMap; |
---|
| 1207 | |
---|
[1193] | 1208 | struct NodeRefMap { |
---|
| 1209 | NodeRefMap(const From& from, const RedNodeRefMap& red_node_ref, |
---|
| 1210 | const BlueNodeRefMap& blue_node_ref) |
---|
| 1211 | : _from(from), _red_node_ref(red_node_ref), |
---|
| 1212 | _blue_node_ref(blue_node_ref) {} |
---|
| 1213 | |
---|
| 1214 | typedef typename From::Node Key; |
---|
| 1215 | typedef typename To::Node Value; |
---|
| 1216 | |
---|
| 1217 | Value operator[](const Key& key) const { |
---|
[1195] | 1218 | if (_from.red(key)) { |
---|
| 1219 | return _red_node_ref[_from.asRedNodeUnsafe(key)]; |
---|
[1193] | 1220 | } else { |
---|
[1195] | 1221 | return _blue_node_ref[_from.asBlueNodeUnsafe(key)]; |
---|
[1193] | 1222 | } |
---|
| 1223 | } |
---|
| 1224 | |
---|
| 1225 | const From& _from; |
---|
| 1226 | const RedNodeRefMap& _red_node_ref; |
---|
| 1227 | const BlueNodeRefMap& _blue_node_ref; |
---|
| 1228 | }; |
---|
| 1229 | |
---|
[1190] | 1230 | struct ArcRefMap { |
---|
| 1231 | ArcRefMap(const From& from, const To& to, const EdgeRefMap& edge_ref) |
---|
| 1232 | : _from(from), _to(to), _edge_ref(edge_ref) {} |
---|
| 1233 | |
---|
| 1234 | typedef typename From::Arc Key; |
---|
| 1235 | typedef typename To::Arc Value; |
---|
| 1236 | |
---|
| 1237 | Value operator[](const Key& key) const { |
---|
| 1238 | return _to.direct(_edge_ref[key], _from.direction(key)); |
---|
| 1239 | } |
---|
| 1240 | |
---|
| 1241 | const From& _from; |
---|
| 1242 | const To& _to; |
---|
| 1243 | const EdgeRefMap& _edge_ref; |
---|
| 1244 | }; |
---|
| 1245 | |
---|
| 1246 | public: |
---|
| 1247 | |
---|
| 1248 | /// \brief Constructor of BpGraphCopy. |
---|
| 1249 | /// |
---|
| 1250 | /// Constructor of BpGraphCopy for copying the content of the |
---|
| 1251 | /// \c from graph into the \c to graph. |
---|
| 1252 | BpGraphCopy(const From& from, To& to) |
---|
| 1253 | : _from(from), _to(to) {} |
---|
| 1254 | |
---|
| 1255 | /// \brief Destructor of BpGraphCopy |
---|
| 1256 | /// |
---|
| 1257 | /// Destructor of BpGraphCopy. |
---|
| 1258 | ~BpGraphCopy() { |
---|
| 1259 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
| 1260 | delete _node_maps[i]; |
---|
| 1261 | } |
---|
| 1262 | for (int i = 0; i < int(_red_maps.size()); ++i) { |
---|
| 1263 | delete _red_maps[i]; |
---|
| 1264 | } |
---|
| 1265 | for (int i = 0; i < int(_blue_maps.size()); ++i) { |
---|
| 1266 | delete _blue_maps[i]; |
---|
| 1267 | } |
---|
| 1268 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
| 1269 | delete _arc_maps[i]; |
---|
| 1270 | } |
---|
| 1271 | for (int i = 0; i < int(_edge_maps.size()); ++i) { |
---|
| 1272 | delete _edge_maps[i]; |
---|
| 1273 | } |
---|
| 1274 | } |
---|
| 1275 | |
---|
| 1276 | /// \brief Copy the node references into the given map. |
---|
| 1277 | /// |
---|
| 1278 | /// This function copies the node references into the given map. |
---|
| 1279 | /// The parameter should be a map, whose key type is the Node type of |
---|
| 1280 | /// the source graph, while the value type is the Node type of the |
---|
| 1281 | /// destination graph. |
---|
| 1282 | template <typename NodeRef> |
---|
| 1283 | BpGraphCopy& nodeRef(NodeRef& map) { |
---|
| 1284 | _node_maps.push_back(new _core_bits::RefCopy<From, Node, |
---|
| 1285 | NodeRefMap, NodeRef>(map)); |
---|
| 1286 | return *this; |
---|
| 1287 | } |
---|
| 1288 | |
---|
| 1289 | /// \brief Copy the node cross references into the given map. |
---|
| 1290 | /// |
---|
| 1291 | /// This function copies the node cross references (reverse references) |
---|
| 1292 | /// into the given map. The parameter should be a map, whose key type |
---|
| 1293 | /// is the Node type of the destination graph, while the value type is |
---|
| 1294 | /// the Node type of the source graph. |
---|
| 1295 | template <typename NodeCrossRef> |
---|
| 1296 | BpGraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
| 1297 | _node_maps.push_back(new _core_bits::CrossRefCopy<From, Node, |
---|
| 1298 | NodeRefMap, NodeCrossRef>(map)); |
---|
| 1299 | return *this; |
---|
| 1300 | } |
---|
| 1301 | |
---|
| 1302 | /// \brief Make a copy of the given node map. |
---|
| 1303 | /// |
---|
| 1304 | /// This function makes a copy of the given node map for the newly |
---|
| 1305 | /// created graph. |
---|
| 1306 | /// The key type of the new map \c tmap should be the Node type of the |
---|
| 1307 | /// destination graph, and the key type of the original map \c map |
---|
| 1308 | /// should be the Node type of the source graph. |
---|
| 1309 | template <typename FromMap, typename ToMap> |
---|
| 1310 | BpGraphCopy& nodeMap(const FromMap& map, ToMap& tmap) { |
---|
| 1311 | _node_maps.push_back(new _core_bits::MapCopy<From, Node, |
---|
| 1312 | NodeRefMap, FromMap, ToMap>(map, tmap)); |
---|
| 1313 | return *this; |
---|
| 1314 | } |
---|
| 1315 | |
---|
| 1316 | /// \brief Make a copy of the given node. |
---|
| 1317 | /// |
---|
| 1318 | /// This function makes a copy of the given node. |
---|
| 1319 | BpGraphCopy& node(const Node& node, TNode& tnode) { |
---|
| 1320 | _node_maps.push_back(new _core_bits::ItemCopy<From, Node, |
---|
| 1321 | NodeRefMap, TNode>(node, tnode)); |
---|
| 1322 | return *this; |
---|
| 1323 | } |
---|
| 1324 | |
---|
| 1325 | /// \brief Copy the red node references into the given map. |
---|
| 1326 | /// |
---|
| 1327 | /// This function copies the red node references into the given |
---|
| 1328 | /// map. The parameter should be a map, whose key type is the |
---|
| 1329 | /// Node type of the source graph with the red item set, while the |
---|
| 1330 | /// value type is the Node type of the destination graph. |
---|
| 1331 | template <typename RedRef> |
---|
| 1332 | BpGraphCopy& redRef(RedRef& map) { |
---|
| 1333 | _red_maps.push_back(new _core_bits::RefCopy<From, RedNode, |
---|
[1193] | 1334 | RedNodeRefMap, RedRef>(map)); |
---|
[1190] | 1335 | return *this; |
---|
| 1336 | } |
---|
| 1337 | |
---|
| 1338 | /// \brief Copy the red node cross references into the given map. |
---|
| 1339 | /// |
---|
| 1340 | /// This function copies the red node cross references (reverse |
---|
| 1341 | /// references) into the given map. The parameter should be a map, |
---|
| 1342 | /// whose key type is the Node type of the destination graph with |
---|
| 1343 | /// the red item set, while the value type is the Node type of the |
---|
| 1344 | /// source graph. |
---|
| 1345 | template <typename RedCrossRef> |
---|
| 1346 | BpGraphCopy& redCrossRef(RedCrossRef& map) { |
---|
| 1347 | _red_maps.push_back(new _core_bits::CrossRefCopy<From, RedNode, |
---|
[1193] | 1348 | RedNodeRefMap, RedCrossRef>(map)); |
---|
[1190] | 1349 | return *this; |
---|
| 1350 | } |
---|
| 1351 | |
---|
| 1352 | /// \brief Make a copy of the given red node map. |
---|
| 1353 | /// |
---|
| 1354 | /// This function makes a copy of the given red node map for the newly |
---|
| 1355 | /// created graph. |
---|
| 1356 | /// The key type of the new map \c tmap should be the Node type of |
---|
| 1357 | /// the destination graph with the red items, and the key type of |
---|
| 1358 | /// the original map \c map should be the Node type of the source |
---|
| 1359 | /// graph. |
---|
| 1360 | template <typename FromMap, typename ToMap> |
---|
[1194] | 1361 | BpGraphCopy& redNodeMap(const FromMap& map, ToMap& tmap) { |
---|
[1190] | 1362 | _red_maps.push_back(new _core_bits::MapCopy<From, RedNode, |
---|
[1193] | 1363 | RedNodeRefMap, FromMap, ToMap>(map, tmap)); |
---|
| 1364 | return *this; |
---|
| 1365 | } |
---|
| 1366 | |
---|
| 1367 | /// \brief Make a copy of the given red node. |
---|
| 1368 | /// |
---|
| 1369 | /// This function makes a copy of the given red node. |
---|
| 1370 | BpGraphCopy& redNode(const RedNode& node, TRedNode& tnode) { |
---|
| 1371 | _red_maps.push_back(new _core_bits::ItemCopy<From, RedNode, |
---|
| 1372 | RedNodeRefMap, TRedNode>(node, tnode)); |
---|
[1190] | 1373 | return *this; |
---|
| 1374 | } |
---|
| 1375 | |
---|
| 1376 | /// \brief Copy the blue node references into the given map. |
---|
| 1377 | /// |
---|
| 1378 | /// This function copies the blue node references into the given |
---|
| 1379 | /// map. The parameter should be a map, whose key type is the |
---|
| 1380 | /// Node type of the source graph with the blue item set, while the |
---|
| 1381 | /// value type is the Node type of the destination graph. |
---|
| 1382 | template <typename BlueRef> |
---|
| 1383 | BpGraphCopy& blueRef(BlueRef& map) { |
---|
| 1384 | _blue_maps.push_back(new _core_bits::RefCopy<From, BlueNode, |
---|
[1193] | 1385 | BlueNodeRefMap, BlueRef>(map)); |
---|
[1190] | 1386 | return *this; |
---|
| 1387 | } |
---|
| 1388 | |
---|
| 1389 | /// \brief Copy the blue node cross references into the given map. |
---|
| 1390 | /// |
---|
| 1391 | /// This function copies the blue node cross references (reverse |
---|
| 1392 | /// references) into the given map. The parameter should be a map, |
---|
| 1393 | /// whose key type is the Node type of the destination graph with |
---|
| 1394 | /// the blue item set, while the value type is the Node type of the |
---|
| 1395 | /// source graph. |
---|
| 1396 | template <typename BlueCrossRef> |
---|
| 1397 | BpGraphCopy& blueCrossRef(BlueCrossRef& map) { |
---|
| 1398 | _blue_maps.push_back(new _core_bits::CrossRefCopy<From, BlueNode, |
---|
[1193] | 1399 | BlueNodeRefMap, BlueCrossRef>(map)); |
---|
[1190] | 1400 | return *this; |
---|
| 1401 | } |
---|
| 1402 | |
---|
| 1403 | /// \brief Make a copy of the given blue node map. |
---|
| 1404 | /// |
---|
| 1405 | /// This function makes a copy of the given blue node map for the newly |
---|
| 1406 | /// created graph. |
---|
| 1407 | /// The key type of the new map \c tmap should be the Node type of |
---|
| 1408 | /// the destination graph with the blue items, and the key type of |
---|
| 1409 | /// the original map \c map should be the Node type of the source |
---|
| 1410 | /// graph. |
---|
| 1411 | template <typename FromMap, typename ToMap> |
---|
[1194] | 1412 | BpGraphCopy& blueNodeMap(const FromMap& map, ToMap& tmap) { |
---|
[1190] | 1413 | _blue_maps.push_back(new _core_bits::MapCopy<From, BlueNode, |
---|
[1193] | 1414 | BlueNodeRefMap, FromMap, ToMap>(map, tmap)); |
---|
| 1415 | return *this; |
---|
| 1416 | } |
---|
| 1417 | |
---|
| 1418 | /// \brief Make a copy of the given blue node. |
---|
| 1419 | /// |
---|
| 1420 | /// This function makes a copy of the given blue node. |
---|
| 1421 | BpGraphCopy& blueNode(const BlueNode& node, TBlueNode& tnode) { |
---|
| 1422 | _blue_maps.push_back(new _core_bits::ItemCopy<From, BlueNode, |
---|
| 1423 | BlueNodeRefMap, TBlueNode>(node, tnode)); |
---|
[1190] | 1424 | return *this; |
---|
| 1425 | } |
---|
| 1426 | |
---|
| 1427 | /// \brief Copy the arc references into the given map. |
---|
| 1428 | /// |
---|
| 1429 | /// This function copies the arc references into the given map. |
---|
| 1430 | /// The parameter should be a map, whose key type is the Arc type of |
---|
| 1431 | /// the source graph, while the value type is the Arc type of the |
---|
| 1432 | /// destination graph. |
---|
| 1433 | template <typename ArcRef> |
---|
| 1434 | BpGraphCopy& arcRef(ArcRef& map) { |
---|
| 1435 | _arc_maps.push_back(new _core_bits::RefCopy<From, Arc, |
---|
| 1436 | ArcRefMap, ArcRef>(map)); |
---|
| 1437 | return *this; |
---|
| 1438 | } |
---|
| 1439 | |
---|
| 1440 | /// \brief Copy the arc cross references into the given map. |
---|
| 1441 | /// |
---|
| 1442 | /// This function copies the arc cross references (reverse references) |
---|
| 1443 | /// into the given map. The parameter should be a map, whose key type |
---|
| 1444 | /// is the Arc type of the destination graph, while the value type is |
---|
| 1445 | /// the Arc type of the source graph. |
---|
| 1446 | template <typename ArcCrossRef> |
---|
| 1447 | BpGraphCopy& arcCrossRef(ArcCrossRef& map) { |
---|
| 1448 | _arc_maps.push_back(new _core_bits::CrossRefCopy<From, Arc, |
---|
| 1449 | ArcRefMap, ArcCrossRef>(map)); |
---|
| 1450 | return *this; |
---|
| 1451 | } |
---|
| 1452 | |
---|
| 1453 | /// \brief Make a copy of the given arc map. |
---|
| 1454 | /// |
---|
| 1455 | /// This function makes a copy of the given arc map for the newly |
---|
| 1456 | /// created graph. |
---|
| 1457 | /// The key type of the new map \c tmap should be the Arc type of the |
---|
| 1458 | /// destination graph, and the key type of the original map \c map |
---|
| 1459 | /// should be the Arc type of the source graph. |
---|
| 1460 | template <typename FromMap, typename ToMap> |
---|
| 1461 | BpGraphCopy& arcMap(const FromMap& map, ToMap& tmap) { |
---|
| 1462 | _arc_maps.push_back(new _core_bits::MapCopy<From, Arc, |
---|
| 1463 | ArcRefMap, FromMap, ToMap>(map, tmap)); |
---|
| 1464 | return *this; |
---|
| 1465 | } |
---|
| 1466 | |
---|
| 1467 | /// \brief Make a copy of the given arc. |
---|
| 1468 | /// |
---|
| 1469 | /// This function makes a copy of the given arc. |
---|
| 1470 | BpGraphCopy& arc(const Arc& arc, TArc& tarc) { |
---|
| 1471 | _arc_maps.push_back(new _core_bits::ItemCopy<From, Arc, |
---|
| 1472 | ArcRefMap, TArc>(arc, tarc)); |
---|
| 1473 | return *this; |
---|
| 1474 | } |
---|
| 1475 | |
---|
| 1476 | /// \brief Copy the edge references into the given map. |
---|
| 1477 | /// |
---|
| 1478 | /// This function copies the edge references into the given map. |
---|
| 1479 | /// The parameter should be a map, whose key type is the Edge type of |
---|
| 1480 | /// the source graph, while the value type is the Edge type of the |
---|
| 1481 | /// destination graph. |
---|
| 1482 | template <typename EdgeRef> |
---|
| 1483 | BpGraphCopy& edgeRef(EdgeRef& map) { |
---|
| 1484 | _edge_maps.push_back(new _core_bits::RefCopy<From, Edge, |
---|
| 1485 | EdgeRefMap, EdgeRef>(map)); |
---|
| 1486 | return *this; |
---|
| 1487 | } |
---|
| 1488 | |
---|
| 1489 | /// \brief Copy the edge cross references into the given map. |
---|
| 1490 | /// |
---|
| 1491 | /// This function copies the edge cross references (reverse references) |
---|
| 1492 | /// into the given map. The parameter should be a map, whose key type |
---|
| 1493 | /// is the Edge type of the destination graph, while the value type is |
---|
| 1494 | /// the Edge type of the source graph. |
---|
| 1495 | template <typename EdgeCrossRef> |
---|
| 1496 | BpGraphCopy& edgeCrossRef(EdgeCrossRef& map) { |
---|
| 1497 | _edge_maps.push_back(new _core_bits::CrossRefCopy<From, |
---|
| 1498 | Edge, EdgeRefMap, EdgeCrossRef>(map)); |
---|
| 1499 | return *this; |
---|
| 1500 | } |
---|
| 1501 | |
---|
| 1502 | /// \brief Make a copy of the given edge map. |
---|
| 1503 | /// |
---|
| 1504 | /// This function makes a copy of the given edge map for the newly |
---|
| 1505 | /// created graph. |
---|
| 1506 | /// The key type of the new map \c tmap should be the Edge type of the |
---|
| 1507 | /// destination graph, and the key type of the original map \c map |
---|
| 1508 | /// should be the Edge type of the source graph. |
---|
| 1509 | template <typename FromMap, typename ToMap> |
---|
| 1510 | BpGraphCopy& edgeMap(const FromMap& map, ToMap& tmap) { |
---|
| 1511 | _edge_maps.push_back(new _core_bits::MapCopy<From, Edge, |
---|
| 1512 | EdgeRefMap, FromMap, ToMap>(map, tmap)); |
---|
| 1513 | return *this; |
---|
| 1514 | } |
---|
| 1515 | |
---|
| 1516 | /// \brief Make a copy of the given edge. |
---|
| 1517 | /// |
---|
| 1518 | /// This function makes a copy of the given edge. |
---|
| 1519 | BpGraphCopy& edge(const Edge& edge, TEdge& tedge) { |
---|
| 1520 | _edge_maps.push_back(new _core_bits::ItemCopy<From, Edge, |
---|
| 1521 | EdgeRefMap, TEdge>(edge, tedge)); |
---|
| 1522 | return *this; |
---|
| 1523 | } |
---|
| 1524 | |
---|
| 1525 | /// \brief Execute copying. |
---|
| 1526 | /// |
---|
| 1527 | /// This function executes the copying of the graph along with the |
---|
| 1528 | /// copying of the assigned data. |
---|
| 1529 | void run() { |
---|
[1193] | 1530 | RedNodeRefMap redNodeRefMap(_from); |
---|
| 1531 | BlueNodeRefMap blueNodeRefMap(_from); |
---|
| 1532 | NodeRefMap nodeRefMap(_from, redNodeRefMap, blueNodeRefMap); |
---|
[1190] | 1533 | EdgeRefMap edgeRefMap(_from); |
---|
| 1534 | ArcRefMap arcRefMap(_from, _to, edgeRefMap); |
---|
| 1535 | _core_bits::BpGraphCopySelector<To>:: |
---|
[1193] | 1536 | copy(_from, _to, redNodeRefMap, blueNodeRefMap, edgeRefMap); |
---|
[1190] | 1537 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
| 1538 | _node_maps[i]->copy(_from, nodeRefMap); |
---|
| 1539 | } |
---|
| 1540 | for (int i = 0; i < int(_red_maps.size()); ++i) { |
---|
[1193] | 1541 | _red_maps[i]->copy(_from, redNodeRefMap); |
---|
[1190] | 1542 | } |
---|
| 1543 | for (int i = 0; i < int(_blue_maps.size()); ++i) { |
---|
[1193] | 1544 | _blue_maps[i]->copy(_from, blueNodeRefMap); |
---|
[1190] | 1545 | } |
---|
| 1546 | for (int i = 0; i < int(_edge_maps.size()); ++i) { |
---|
| 1547 | _edge_maps[i]->copy(_from, edgeRefMap); |
---|
| 1548 | } |
---|
| 1549 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
| 1550 | _arc_maps[i]->copy(_from, arcRefMap); |
---|
| 1551 | } |
---|
| 1552 | } |
---|
| 1553 | |
---|
| 1554 | private: |
---|
| 1555 | |
---|
| 1556 | const From& _from; |
---|
| 1557 | To& _to; |
---|
| 1558 | |
---|
| 1559 | std::vector<_core_bits::MapCopyBase<From, Node, NodeRefMap>* > |
---|
| 1560 | _node_maps; |
---|
| 1561 | |
---|
[1193] | 1562 | std::vector<_core_bits::MapCopyBase<From, RedNode, RedNodeRefMap>* > |
---|
[1190] | 1563 | _red_maps; |
---|
| 1564 | |
---|
[1193] | 1565 | std::vector<_core_bits::MapCopyBase<From, BlueNode, BlueNodeRefMap>* > |
---|
[1190] | 1566 | _blue_maps; |
---|
| 1567 | |
---|
| 1568 | std::vector<_core_bits::MapCopyBase<From, Arc, ArcRefMap>* > |
---|
| 1569 | _arc_maps; |
---|
| 1570 | |
---|
| 1571 | std::vector<_core_bits::MapCopyBase<From, Edge, EdgeRefMap>* > |
---|
| 1572 | _edge_maps; |
---|
| 1573 | |
---|
| 1574 | }; |
---|
| 1575 | |
---|
| 1576 | /// \brief Copy a graph to another graph. |
---|
| 1577 | /// |
---|
| 1578 | /// This function copies a graph to another graph. |
---|
| 1579 | /// The complete usage of it is detailed in the BpGraphCopy class, |
---|
| 1580 | /// but a short example shows a basic work: |
---|
| 1581 | ///\code |
---|
| 1582 | /// graphCopy(src, trg).nodeRef(nr).edgeCrossRef(ecr).run(); |
---|
| 1583 | ///\endcode |
---|
| 1584 | /// |
---|
| 1585 | /// After the copy the \c nr map will contain the mapping from the |
---|
| 1586 | /// nodes of the \c from graph to the nodes of the \c to graph and |
---|
| 1587 | /// \c ecr will contain the mapping from the edges of the \c to graph |
---|
| 1588 | /// to the edges of the \c from graph. |
---|
| 1589 | /// |
---|
| 1590 | /// \see BpGraphCopy |
---|
| 1591 | template <typename From, typename To> |
---|
| 1592 | BpGraphCopy<From, To> |
---|
| 1593 | bpGraphCopy(const From& from, To& to) { |
---|
| 1594 | return BpGraphCopy<From, To>(from, to); |
---|
| 1595 | } |
---|
| 1596 | |
---|
[220] | 1597 | namespace _core_bits { |
---|
| 1598 | |
---|
| 1599 | template <typename Graph, typename Enable = void> |
---|
| 1600 | struct FindArcSelector { |
---|
| 1601 | typedef typename Graph::Node Node; |
---|
| 1602 | typedef typename Graph::Arc Arc; |
---|
| 1603 | static Arc find(const Graph &g, Node u, Node v, Arc e) { |
---|
| 1604 | if (e == INVALID) { |
---|
| 1605 | g.firstOut(e, u); |
---|
| 1606 | } else { |
---|
| 1607 | g.nextOut(e); |
---|
| 1608 | } |
---|
| 1609 | while (e != INVALID && g.target(e) != v) { |
---|
| 1610 | g.nextOut(e); |
---|
| 1611 | } |
---|
| 1612 | return e; |
---|
| 1613 | } |
---|
| 1614 | }; |
---|
| 1615 | |
---|
| 1616 | template <typename Graph> |
---|
| 1617 | struct FindArcSelector< |
---|
| 1618 | Graph, |
---|
[282] | 1619 | typename enable_if<typename Graph::FindArcTag, void>::type> |
---|
[220] | 1620 | { |
---|
| 1621 | typedef typename Graph::Node Node; |
---|
| 1622 | typedef typename Graph::Arc Arc; |
---|
| 1623 | static Arc find(const Graph &g, Node u, Node v, Arc prev) { |
---|
| 1624 | return g.findArc(u, v, prev); |
---|
| 1625 | } |
---|
| 1626 | }; |
---|
| 1627 | } |
---|
| 1628 | |
---|
[282] | 1629 | /// \brief Find an arc between two nodes of a digraph. |
---|
[220] | 1630 | /// |
---|
[282] | 1631 | /// This function finds an arc from node \c u to node \c v in the |
---|
| 1632 | /// digraph \c g. |
---|
[220] | 1633 | /// |
---|
| 1634 | /// If \c prev is \ref INVALID (this is the default value), then |
---|
| 1635 | /// it finds the first arc from \c u to \c v. Otherwise it looks for |
---|
| 1636 | /// the next arc from \c u to \c v after \c prev. |
---|
| 1637 | /// \return The found arc or \ref INVALID if there is no such an arc. |
---|
| 1638 | /// |
---|
| 1639 | /// Thus you can iterate through each arc from \c u to \c v as it follows. |
---|
| 1640 | ///\code |
---|
[282] | 1641 | /// for(Arc e = findArc(g,u,v); e != INVALID; e = findArc(g,u,v,e)) { |
---|
[220] | 1642 | /// ... |
---|
| 1643 | /// } |
---|
| 1644 | ///\endcode |
---|
| 1645 | /// |
---|
[282] | 1646 | /// \note \ref ConArcIt provides iterator interface for the same |
---|
| 1647 | /// functionality. |
---|
| 1648 | /// |
---|
[220] | 1649 | ///\sa ConArcIt |
---|
[282] | 1650 | ///\sa ArcLookUp, AllArcLookUp, DynArcLookUp |
---|
[220] | 1651 | template <typename Graph> |
---|
| 1652 | inline typename Graph::Arc |
---|
| 1653 | findArc(const Graph &g, typename Graph::Node u, typename Graph::Node v, |
---|
| 1654 | typename Graph::Arc prev = INVALID) { |
---|
| 1655 | return _core_bits::FindArcSelector<Graph>::find(g, u, v, prev); |
---|
| 1656 | } |
---|
| 1657 | |
---|
[282] | 1658 | /// \brief Iterator for iterating on parallel arcs connecting the same nodes. |
---|
[220] | 1659 | /// |
---|
[282] | 1660 | /// Iterator for iterating on parallel arcs connecting the same nodes. It is |
---|
| 1661 | /// a higher level interface for the \ref findArc() function. You can |
---|
[220] | 1662 | /// use it the following way: |
---|
| 1663 | ///\code |
---|
| 1664 | /// for (ConArcIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
---|
| 1665 | /// ... |
---|
| 1666 | /// } |
---|
| 1667 | ///\endcode |
---|
| 1668 | /// |
---|
| 1669 | ///\sa findArc() |
---|
[282] | 1670 | ///\sa ArcLookUp, AllArcLookUp, DynArcLookUp |
---|
[606] | 1671 | template <typename GR> |
---|
| 1672 | class ConArcIt : public GR::Arc { |
---|
[664] | 1673 | typedef typename GR::Arc Parent; |
---|
| 1674 | |
---|
[220] | 1675 | public: |
---|
| 1676 | |
---|
[664] | 1677 | typedef typename GR::Arc Arc; |
---|
| 1678 | typedef typename GR::Node Node; |
---|
[220] | 1679 | |
---|
| 1680 | /// \brief Constructor. |
---|
| 1681 | /// |
---|
[282] | 1682 | /// Construct a new ConArcIt iterating on the arcs that |
---|
| 1683 | /// connects nodes \c u and \c v. |
---|
[664] | 1684 | ConArcIt(const GR& g, Node u, Node v) : _graph(g) { |
---|
[220] | 1685 | Parent::operator=(findArc(_graph, u, v)); |
---|
| 1686 | } |
---|
| 1687 | |
---|
| 1688 | /// \brief Constructor. |
---|
| 1689 | /// |
---|
[282] | 1690 | /// Construct a new ConArcIt that continues the iterating from arc \c a. |
---|
[664] | 1691 | ConArcIt(const GR& g, Arc a) : Parent(a), _graph(g) {} |
---|
[220] | 1692 | |
---|
| 1693 | /// \brief Increment operator. |
---|
| 1694 | /// |
---|
| 1695 | /// It increments the iterator and gives back the next arc. |
---|
| 1696 | ConArcIt& operator++() { |
---|
| 1697 | Parent::operator=(findArc(_graph, _graph.source(*this), |
---|
| 1698 | _graph.target(*this), *this)); |
---|
| 1699 | return *this; |
---|
| 1700 | } |
---|
| 1701 | private: |
---|
[664] | 1702 | const GR& _graph; |
---|
[220] | 1703 | }; |
---|
| 1704 | |
---|
| 1705 | namespace _core_bits { |
---|
| 1706 | |
---|
| 1707 | template <typename Graph, typename Enable = void> |
---|
| 1708 | struct FindEdgeSelector { |
---|
| 1709 | typedef typename Graph::Node Node; |
---|
| 1710 | typedef typename Graph::Edge Edge; |
---|
| 1711 | static Edge find(const Graph &g, Node u, Node v, Edge e) { |
---|
| 1712 | bool b; |
---|
| 1713 | if (u != v) { |
---|
| 1714 | if (e == INVALID) { |
---|
| 1715 | g.firstInc(e, b, u); |
---|
| 1716 | } else { |
---|
| 1717 | b = g.u(e) == u; |
---|
| 1718 | g.nextInc(e, b); |
---|
| 1719 | } |
---|
| 1720 | while (e != INVALID && (b ? g.v(e) : g.u(e)) != v) { |
---|
| 1721 | g.nextInc(e, b); |
---|
| 1722 | } |
---|
| 1723 | } else { |
---|
| 1724 | if (e == INVALID) { |
---|
| 1725 | g.firstInc(e, b, u); |
---|
| 1726 | } else { |
---|
| 1727 | b = true; |
---|
| 1728 | g.nextInc(e, b); |
---|
| 1729 | } |
---|
| 1730 | while (e != INVALID && (!b || g.v(e) != v)) { |
---|
| 1731 | g.nextInc(e, b); |
---|
| 1732 | } |
---|
| 1733 | } |
---|
| 1734 | return e; |
---|
| 1735 | } |
---|
| 1736 | }; |
---|
| 1737 | |
---|
| 1738 | template <typename Graph> |
---|
| 1739 | struct FindEdgeSelector< |
---|
| 1740 | Graph, |
---|
| 1741 | typename enable_if<typename Graph::FindEdgeTag, void>::type> |
---|
| 1742 | { |
---|
| 1743 | typedef typename Graph::Node Node; |
---|
| 1744 | typedef typename Graph::Edge Edge; |
---|
| 1745 | static Edge find(const Graph &g, Node u, Node v, Edge prev) { |
---|
| 1746 | return g.findEdge(u, v, prev); |
---|
| 1747 | } |
---|
| 1748 | }; |
---|
| 1749 | } |
---|
| 1750 | |
---|
[282] | 1751 | /// \brief Find an edge between two nodes of a graph. |
---|
[220] | 1752 | /// |
---|
[282] | 1753 | /// This function finds an edge from node \c u to node \c v in graph \c g. |
---|
| 1754 | /// If node \c u and node \c v is equal then each loop edge |
---|
[220] | 1755 | /// will be enumerated once. |
---|
| 1756 | /// |
---|
| 1757 | /// If \c prev is \ref INVALID (this is the default value), then |
---|
[282] | 1758 | /// it finds the first edge from \c u to \c v. Otherwise it looks for |
---|
| 1759 | /// the next edge from \c u to \c v after \c prev. |
---|
| 1760 | /// \return The found edge or \ref INVALID if there is no such an edge. |
---|
[220] | 1761 | /// |
---|
[282] | 1762 | /// Thus you can iterate through each edge between \c u and \c v |
---|
| 1763 | /// as it follows. |
---|
[220] | 1764 | ///\code |
---|
[282] | 1765 | /// for(Edge e = findEdge(g,u,v); e != INVALID; e = findEdge(g,u,v,e)) { |
---|
[220] | 1766 | /// ... |
---|
| 1767 | /// } |
---|
| 1768 | ///\endcode |
---|
| 1769 | /// |
---|
[282] | 1770 | /// \note \ref ConEdgeIt provides iterator interface for the same |
---|
| 1771 | /// functionality. |
---|
| 1772 | /// |
---|
[220] | 1773 | ///\sa ConEdgeIt |
---|
| 1774 | template <typename Graph> |
---|
| 1775 | inline typename Graph::Edge |
---|
| 1776 | findEdge(const Graph &g, typename Graph::Node u, typename Graph::Node v, |
---|
| 1777 | typename Graph::Edge p = INVALID) { |
---|
| 1778 | return _core_bits::FindEdgeSelector<Graph>::find(g, u, v, p); |
---|
| 1779 | } |
---|
| 1780 | |
---|
[282] | 1781 | /// \brief Iterator for iterating on parallel edges connecting the same nodes. |
---|
[220] | 1782 | /// |
---|
[282] | 1783 | /// Iterator for iterating on parallel edges connecting the same nodes. |
---|
| 1784 | /// It is a higher level interface for the findEdge() function. You can |
---|
[220] | 1785 | /// use it the following way: |
---|
| 1786 | ///\code |
---|
[282] | 1787 | /// for (ConEdgeIt<Graph> it(g, u, v); it != INVALID; ++it) { |
---|
[220] | 1788 | /// ... |
---|
| 1789 | /// } |
---|
| 1790 | ///\endcode |
---|
| 1791 | /// |
---|
| 1792 | ///\sa findEdge() |
---|
[606] | 1793 | template <typename GR> |
---|
| 1794 | class ConEdgeIt : public GR::Edge { |
---|
[664] | 1795 | typedef typename GR::Edge Parent; |
---|
| 1796 | |
---|
[220] | 1797 | public: |
---|
| 1798 | |
---|
[664] | 1799 | typedef typename GR::Edge Edge; |
---|
| 1800 | typedef typename GR::Node Node; |
---|
[220] | 1801 | |
---|
| 1802 | /// \brief Constructor. |
---|
| 1803 | /// |
---|
[282] | 1804 | /// Construct a new ConEdgeIt iterating on the edges that |
---|
| 1805 | /// connects nodes \c u and \c v. |
---|
[664] | 1806 | ConEdgeIt(const GR& g, Node u, Node v) : _graph(g), _u(u), _v(v) { |
---|
[449] | 1807 | Parent::operator=(findEdge(_graph, _u, _v)); |
---|
[220] | 1808 | } |
---|
| 1809 | |
---|
| 1810 | /// \brief Constructor. |
---|
| 1811 | /// |
---|
[282] | 1812 | /// Construct a new ConEdgeIt that continues iterating from edge \c e. |
---|
[664] | 1813 | ConEdgeIt(const GR& g, Edge e) : Parent(e), _graph(g) {} |
---|
[220] | 1814 | |
---|
| 1815 | /// \brief Increment operator. |
---|
| 1816 | /// |
---|
| 1817 | /// It increments the iterator and gives back the next edge. |
---|
| 1818 | ConEdgeIt& operator++() { |
---|
[449] | 1819 | Parent::operator=(findEdge(_graph, _u, _v, *this)); |
---|
[220] | 1820 | return *this; |
---|
| 1821 | } |
---|
| 1822 | private: |
---|
[664] | 1823 | const GR& _graph; |
---|
[449] | 1824 | Node _u, _v; |
---|
[220] | 1825 | }; |
---|
| 1826 | |
---|
| 1827 | |
---|
[282] | 1828 | ///Dynamic arc look-up between given endpoints. |
---|
[220] | 1829 | |
---|
| 1830 | ///Using this class, you can find an arc in a digraph from a given |
---|
[282] | 1831 | ///source to a given target in amortized time <em>O</em>(log<em>d</em>), |
---|
[220] | 1832 | ///where <em>d</em> is the out-degree of the source node. |
---|
| 1833 | /// |
---|
| 1834 | ///It is possible to find \e all parallel arcs between two nodes with |
---|
[233] | 1835 | ///the \c operator() member. |
---|
[220] | 1836 | /// |
---|
[282] | 1837 | ///This is a dynamic data structure. Consider to use \ref ArcLookUp or |
---|
| 1838 | ///\ref AllArcLookUp if your digraph is not changed so frequently. |
---|
[220] | 1839 | /// |
---|
[282] | 1840 | ///This class uses a self-adjusting binary search tree, the Splay tree |
---|
| 1841 | ///of Sleator and Tarjan to guarantee the logarithmic amortized |
---|
| 1842 | ///time bound for arc look-ups. This class also guarantees the |
---|
[220] | 1843 | ///optimal time bound in a constant factor for any distribution of |
---|
| 1844 | ///queries. |
---|
| 1845 | /// |
---|
[606] | 1846 | ///\tparam GR The type of the underlying digraph. |
---|
[220] | 1847 | /// |
---|
| 1848 | ///\sa ArcLookUp |
---|
| 1849 | ///\sa AllArcLookUp |
---|
[606] | 1850 | template <typename GR> |
---|
[220] | 1851 | class DynArcLookUp |
---|
[606] | 1852 | : protected ItemSetTraits<GR, typename GR::Arc>::ItemNotifier::ObserverBase |
---|
[220] | 1853 | { |
---|
[606] | 1854 | typedef typename ItemSetTraits<GR, typename GR::Arc> |
---|
[220] | 1855 | ::ItemNotifier::ObserverBase Parent; |
---|
| 1856 | |
---|
[606] | 1857 | TEMPLATE_DIGRAPH_TYPEDEFS(GR); |
---|
[664] | 1858 | |
---|
| 1859 | public: |
---|
| 1860 | |
---|
| 1861 | /// The Digraph type |
---|
[606] | 1862 | typedef GR Digraph; |
---|
[1270] | 1863 | |
---|
[220] | 1864 | protected: |
---|
| 1865 | |
---|
[956] | 1866 | class AutoNodeMap : public ItemSetTraits<GR, Node>::template Map<Arc>::Type |
---|
| 1867 | { |
---|
[664] | 1868 | typedef typename ItemSetTraits<GR, Node>::template Map<Arc>::Type Parent; |
---|
| 1869 | |
---|
[220] | 1870 | public: |
---|
| 1871 | |
---|
[606] | 1872 | AutoNodeMap(const GR& digraph) : Parent(digraph, INVALID) {} |
---|
[220] | 1873 | |
---|
| 1874 | virtual void add(const Node& node) { |
---|
| 1875 | Parent::add(node); |
---|
| 1876 | Parent::set(node, INVALID); |
---|
| 1877 | } |
---|
| 1878 | |
---|
| 1879 | virtual void add(const std::vector<Node>& nodes) { |
---|
| 1880 | Parent::add(nodes); |
---|
| 1881 | for (int i = 0; i < int(nodes.size()); ++i) { |
---|
| 1882 | Parent::set(nodes[i], INVALID); |
---|
| 1883 | } |
---|
| 1884 | } |
---|
| 1885 | |
---|
| 1886 | virtual void build() { |
---|
| 1887 | Parent::build(); |
---|
| 1888 | Node it; |
---|
| 1889 | typename Parent::Notifier* nf = Parent::notifier(); |
---|
| 1890 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
| 1891 | Parent::set(it, INVALID); |
---|
| 1892 | } |
---|
| 1893 | } |
---|
| 1894 | }; |
---|
| 1895 | |
---|
| 1896 | class ArcLess { |
---|
| 1897 | const Digraph &g; |
---|
| 1898 | public: |
---|
| 1899 | ArcLess(const Digraph &_g) : g(_g) {} |
---|
| 1900 | bool operator()(Arc a,Arc b) const |
---|
| 1901 | { |
---|
| 1902 | return g.target(a)<g.target(b); |
---|
| 1903 | } |
---|
| 1904 | }; |
---|
| 1905 | |
---|
[956] | 1906 | protected: |
---|
[664] | 1907 | |
---|
| 1908 | const Digraph &_g; |
---|
| 1909 | AutoNodeMap _head; |
---|
| 1910 | typename Digraph::template ArcMap<Arc> _parent; |
---|
| 1911 | typename Digraph::template ArcMap<Arc> _left; |
---|
| 1912 | typename Digraph::template ArcMap<Arc> _right; |
---|
| 1913 | |
---|
[220] | 1914 | public: |
---|
| 1915 | |
---|
| 1916 | ///Constructor |
---|
| 1917 | |
---|
| 1918 | ///Constructor. |
---|
| 1919 | /// |
---|
| 1920 | ///It builds up the search database. |
---|
| 1921 | DynArcLookUp(const Digraph &g) |
---|
| 1922 | : _g(g),_head(g),_parent(g),_left(g),_right(g) |
---|
| 1923 | { |
---|
| 1924 | Parent::attach(_g.notifier(typename Digraph::Arc())); |
---|
| 1925 | refresh(); |
---|
| 1926 | } |
---|
| 1927 | |
---|
| 1928 | protected: |
---|
| 1929 | |
---|
| 1930 | virtual void add(const Arc& arc) { |
---|
| 1931 | insert(arc); |
---|
| 1932 | } |
---|
| 1933 | |
---|
| 1934 | virtual void add(const std::vector<Arc>& arcs) { |
---|
| 1935 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
| 1936 | insert(arcs[i]); |
---|
| 1937 | } |
---|
| 1938 | } |
---|
| 1939 | |
---|
| 1940 | virtual void erase(const Arc& arc) { |
---|
| 1941 | remove(arc); |
---|
| 1942 | } |
---|
| 1943 | |
---|
| 1944 | virtual void erase(const std::vector<Arc>& arcs) { |
---|
| 1945 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
| 1946 | remove(arcs[i]); |
---|
| 1947 | } |
---|
| 1948 | } |
---|
| 1949 | |
---|
| 1950 | virtual void build() { |
---|
| 1951 | refresh(); |
---|
| 1952 | } |
---|
| 1953 | |
---|
| 1954 | virtual void clear() { |
---|
| 1955 | for(NodeIt n(_g);n!=INVALID;++n) { |
---|
[628] | 1956 | _head[n] = INVALID; |
---|
[220] | 1957 | } |
---|
| 1958 | } |
---|
| 1959 | |
---|
| 1960 | void insert(Arc arc) { |
---|
| 1961 | Node s = _g.source(arc); |
---|
| 1962 | Node t = _g.target(arc); |
---|
[628] | 1963 | _left[arc] = INVALID; |
---|
| 1964 | _right[arc] = INVALID; |
---|
[220] | 1965 | |
---|
| 1966 | Arc e = _head[s]; |
---|
| 1967 | if (e == INVALID) { |
---|
[628] | 1968 | _head[s] = arc; |
---|
| 1969 | _parent[arc] = INVALID; |
---|
[220] | 1970 | return; |
---|
| 1971 | } |
---|
| 1972 | while (true) { |
---|
| 1973 | if (t < _g.target(e)) { |
---|
| 1974 | if (_left[e] == INVALID) { |
---|
[628] | 1975 | _left[e] = arc; |
---|
| 1976 | _parent[arc] = e; |
---|
[220] | 1977 | splay(arc); |
---|
| 1978 | return; |
---|
| 1979 | } else { |
---|
| 1980 | e = _left[e]; |
---|
| 1981 | } |
---|
| 1982 | } else { |
---|
| 1983 | if (_right[e] == INVALID) { |
---|
[628] | 1984 | _right[e] = arc; |
---|
| 1985 | _parent[arc] = e; |
---|
[220] | 1986 | splay(arc); |
---|
| 1987 | return; |
---|
| 1988 | } else { |
---|
| 1989 | e = _right[e]; |
---|
| 1990 | } |
---|
| 1991 | } |
---|
| 1992 | } |
---|
| 1993 | } |
---|
| 1994 | |
---|
| 1995 | void remove(Arc arc) { |
---|
| 1996 | if (_left[arc] == INVALID) { |
---|
| 1997 | if (_right[arc] != INVALID) { |
---|
[628] | 1998 | _parent[_right[arc]] = _parent[arc]; |
---|
[220] | 1999 | } |
---|
| 2000 | if (_parent[arc] != INVALID) { |
---|
| 2001 | if (_left[_parent[arc]] == arc) { |
---|
[628] | 2002 | _left[_parent[arc]] = _right[arc]; |
---|
[220] | 2003 | } else { |
---|
[628] | 2004 | _right[_parent[arc]] = _right[arc]; |
---|
[220] | 2005 | } |
---|
| 2006 | } else { |
---|
[628] | 2007 | _head[_g.source(arc)] = _right[arc]; |
---|
[220] | 2008 | } |
---|
| 2009 | } else if (_right[arc] == INVALID) { |
---|
[628] | 2010 | _parent[_left[arc]] = _parent[arc]; |
---|
[220] | 2011 | if (_parent[arc] != INVALID) { |
---|
| 2012 | if (_left[_parent[arc]] == arc) { |
---|
[628] | 2013 | _left[_parent[arc]] = _left[arc]; |
---|
[220] | 2014 | } else { |
---|
[628] | 2015 | _right[_parent[arc]] = _left[arc]; |
---|
[220] | 2016 | } |
---|
| 2017 | } else { |
---|
[628] | 2018 | _head[_g.source(arc)] = _left[arc]; |
---|
[220] | 2019 | } |
---|
| 2020 | } else { |
---|
| 2021 | Arc e = _left[arc]; |
---|
| 2022 | if (_right[e] != INVALID) { |
---|
| 2023 | e = _right[e]; |
---|
| 2024 | while (_right[e] != INVALID) { |
---|
| 2025 | e = _right[e]; |
---|
| 2026 | } |
---|
| 2027 | Arc s = _parent[e]; |
---|
[628] | 2028 | _right[_parent[e]] = _left[e]; |
---|
[220] | 2029 | if (_left[e] != INVALID) { |
---|
[628] | 2030 | _parent[_left[e]] = _parent[e]; |
---|
[220] | 2031 | } |
---|
| 2032 | |
---|
[628] | 2033 | _left[e] = _left[arc]; |
---|
| 2034 | _parent[_left[arc]] = e; |
---|
| 2035 | _right[e] = _right[arc]; |
---|
| 2036 | _parent[_right[arc]] = e; |
---|
[220] | 2037 | |
---|
[628] | 2038 | _parent[e] = _parent[arc]; |
---|
[220] | 2039 | if (_parent[arc] != INVALID) { |
---|
| 2040 | if (_left[_parent[arc]] == arc) { |
---|
[628] | 2041 | _left[_parent[arc]] = e; |
---|
[220] | 2042 | } else { |
---|
[628] | 2043 | _right[_parent[arc]] = e; |
---|
[220] | 2044 | } |
---|
| 2045 | } |
---|
| 2046 | splay(s); |
---|
| 2047 | } else { |
---|
[628] | 2048 | _right[e] = _right[arc]; |
---|
| 2049 | _parent[_right[arc]] = e; |
---|
| 2050 | _parent[e] = _parent[arc]; |
---|
[220] | 2051 | |
---|
| 2052 | if (_parent[arc] != INVALID) { |
---|
| 2053 | if (_left[_parent[arc]] == arc) { |
---|
[628] | 2054 | _left[_parent[arc]] = e; |
---|
[220] | 2055 | } else { |
---|
[628] | 2056 | _right[_parent[arc]] = e; |
---|
[220] | 2057 | } |
---|
| 2058 | } else { |
---|
[628] | 2059 | _head[_g.source(arc)] = e; |
---|
[220] | 2060 | } |
---|
| 2061 | } |
---|
| 2062 | } |
---|
| 2063 | } |
---|
| 2064 | |
---|
| 2065 | Arc refreshRec(std::vector<Arc> &v,int a,int b) |
---|
| 2066 | { |
---|
| 2067 | int m=(a+b)/2; |
---|
| 2068 | Arc me=v[m]; |
---|
| 2069 | if (a < m) { |
---|
| 2070 | Arc left = refreshRec(v,a,m-1); |
---|
[628] | 2071 | _left[me] = left; |
---|
| 2072 | _parent[left] = me; |
---|
[220] | 2073 | } else { |
---|
[628] | 2074 | _left[me] = INVALID; |
---|
[220] | 2075 | } |
---|
| 2076 | if (m < b) { |
---|
| 2077 | Arc right = refreshRec(v,m+1,b); |
---|
[628] | 2078 | _right[me] = right; |
---|
| 2079 | _parent[right] = me; |
---|
[220] | 2080 | } else { |
---|
[628] | 2081 | _right[me] = INVALID; |
---|
[220] | 2082 | } |
---|
| 2083 | return me; |
---|
| 2084 | } |
---|
| 2085 | |
---|
| 2086 | void refresh() { |
---|
| 2087 | for(NodeIt n(_g);n!=INVALID;++n) { |
---|
| 2088 | std::vector<Arc> v; |
---|
[233] | 2089 | for(OutArcIt a(_g,n);a!=INVALID;++a) v.push_back(a); |
---|
| 2090 | if (!v.empty()) { |
---|
[220] | 2091 | std::sort(v.begin(),v.end(),ArcLess(_g)); |
---|
| 2092 | Arc head = refreshRec(v,0,v.size()-1); |
---|
[628] | 2093 | _head[n] = head; |
---|
| 2094 | _parent[head] = INVALID; |
---|
[220] | 2095 | } |
---|
[628] | 2096 | else _head[n] = INVALID; |
---|
[220] | 2097 | } |
---|
| 2098 | } |
---|
| 2099 | |
---|
| 2100 | void zig(Arc v) { |
---|
| 2101 | Arc w = _parent[v]; |
---|
[628] | 2102 | _parent[v] = _parent[w]; |
---|
| 2103 | _parent[w] = v; |
---|
| 2104 | _left[w] = _right[v]; |
---|
| 2105 | _right[v] = w; |
---|
[220] | 2106 | if (_parent[v] != INVALID) { |
---|
| 2107 | if (_right[_parent[v]] == w) { |
---|
[628] | 2108 | _right[_parent[v]] = v; |
---|
[220] | 2109 | } else { |
---|
[628] | 2110 | _left[_parent[v]] = v; |
---|
[220] | 2111 | } |
---|
| 2112 | } |
---|
| 2113 | if (_left[w] != INVALID){ |
---|
[628] | 2114 | _parent[_left[w]] = w; |
---|
[220] | 2115 | } |
---|
| 2116 | } |
---|
| 2117 | |
---|
| 2118 | void zag(Arc v) { |
---|
| 2119 | Arc w = _parent[v]; |
---|
[628] | 2120 | _parent[v] = _parent[w]; |
---|
| 2121 | _parent[w] = v; |
---|
| 2122 | _right[w] = _left[v]; |
---|
| 2123 | _left[v] = w; |
---|
[220] | 2124 | if (_parent[v] != INVALID){ |
---|
| 2125 | if (_left[_parent[v]] == w) { |
---|
[628] | 2126 | _left[_parent[v]] = v; |
---|
[220] | 2127 | } else { |
---|
[628] | 2128 | _right[_parent[v]] = v; |
---|
[220] | 2129 | } |
---|
| 2130 | } |
---|
| 2131 | if (_right[w] != INVALID){ |
---|
[628] | 2132 | _parent[_right[w]] = w; |
---|
[220] | 2133 | } |
---|
| 2134 | } |
---|
| 2135 | |
---|
| 2136 | void splay(Arc v) { |
---|
| 2137 | while (_parent[v] != INVALID) { |
---|
| 2138 | if (v == _left[_parent[v]]) { |
---|
| 2139 | if (_parent[_parent[v]] == INVALID) { |
---|
| 2140 | zig(v); |
---|
| 2141 | } else { |
---|
| 2142 | if (_parent[v] == _left[_parent[_parent[v]]]) { |
---|
| 2143 | zig(_parent[v]); |
---|
| 2144 | zig(v); |
---|
| 2145 | } else { |
---|
| 2146 | zig(v); |
---|
| 2147 | zag(v); |
---|
| 2148 | } |
---|
| 2149 | } |
---|
| 2150 | } else { |
---|
| 2151 | if (_parent[_parent[v]] == INVALID) { |
---|
| 2152 | zag(v); |
---|
| 2153 | } else { |
---|
| 2154 | if (_parent[v] == _left[_parent[_parent[v]]]) { |
---|
| 2155 | zag(v); |
---|
| 2156 | zig(v); |
---|
| 2157 | } else { |
---|
| 2158 | zag(_parent[v]); |
---|
| 2159 | zag(v); |
---|
| 2160 | } |
---|
| 2161 | } |
---|
| 2162 | } |
---|
| 2163 | } |
---|
| 2164 | _head[_g.source(v)] = v; |
---|
| 2165 | } |
---|
| 2166 | |
---|
| 2167 | |
---|
| 2168 | public: |
---|
| 2169 | |
---|
| 2170 | ///Find an arc between two nodes. |
---|
| 2171 | |
---|
[233] | 2172 | ///Find an arc between two nodes. |
---|
[282] | 2173 | ///\param s The source node. |
---|
| 2174 | ///\param t The target node. |
---|
[233] | 2175 | ///\param p The previous arc between \c s and \c t. It it is INVALID or |
---|
| 2176 | ///not given, the operator finds the first appropriate arc. |
---|
| 2177 | ///\return An arc from \c s to \c t after \c p or |
---|
| 2178 | ///\ref INVALID if there is no more. |
---|
| 2179 | /// |
---|
| 2180 | ///For example, you can count the number of arcs from \c u to \c v in the |
---|
| 2181 | ///following way. |
---|
| 2182 | ///\code |
---|
| 2183 | ///DynArcLookUp<ListDigraph> ae(g); |
---|
| 2184 | ///... |
---|
[282] | 2185 | ///int n = 0; |
---|
| 2186 | ///for(Arc a = ae(u,v); a != INVALID; a = ae(u,v,a)) n++; |
---|
[233] | 2187 | ///\endcode |
---|
| 2188 | /// |
---|
[282] | 2189 | ///Finding the arcs take at most <em>O</em>(log<em>d</em>) |
---|
[233] | 2190 | ///amortized time, specifically, the time complexity of the lookups |
---|
| 2191 | ///is equal to the optimal search tree implementation for the |
---|
| 2192 | ///current query distribution in a constant factor. |
---|
| 2193 | /// |
---|
| 2194 | ///\note This is a dynamic data structure, therefore the data |
---|
[282] | 2195 | ///structure is updated after each graph alteration. Thus although |
---|
| 2196 | ///this data structure is theoretically faster than \ref ArcLookUp |
---|
[313] | 2197 | ///and \ref AllArcLookUp, it often provides worse performance than |
---|
[233] | 2198 | ///them. |
---|
| 2199 | Arc operator()(Node s, Node t, Arc p = INVALID) const { |
---|
| 2200 | if (p == INVALID) { |
---|
| 2201 | Arc a = _head[s]; |
---|
| 2202 | if (a == INVALID) return INVALID; |
---|
| 2203 | Arc r = INVALID; |
---|
| 2204 | while (true) { |
---|
| 2205 | if (_g.target(a) < t) { |
---|
| 2206 | if (_right[a] == INVALID) { |
---|
| 2207 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
| 2208 | return r; |
---|
| 2209 | } else { |
---|
| 2210 | a = _right[a]; |
---|
| 2211 | } |
---|
| 2212 | } else { |
---|
| 2213 | if (_g.target(a) == t) { |
---|
| 2214 | r = a; |
---|
| 2215 | } |
---|
| 2216 | if (_left[a] == INVALID) { |
---|
| 2217 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
| 2218 | return r; |
---|
| 2219 | } else { |
---|
| 2220 | a = _left[a]; |
---|
| 2221 | } |
---|
| 2222 | } |
---|
| 2223 | } |
---|
| 2224 | } else { |
---|
| 2225 | Arc a = p; |
---|
| 2226 | if (_right[a] != INVALID) { |
---|
| 2227 | a = _right[a]; |
---|
| 2228 | while (_left[a] != INVALID) { |
---|
| 2229 | a = _left[a]; |
---|
| 2230 | } |
---|
[220] | 2231 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
[233] | 2232 | } else { |
---|
| 2233 | while (_parent[a] != INVALID && _right[_parent[a]] == a) { |
---|
| 2234 | a = _parent[a]; |
---|
| 2235 | } |
---|
| 2236 | if (_parent[a] == INVALID) { |
---|
[220] | 2237 | return INVALID; |
---|
| 2238 | } else { |
---|
[233] | 2239 | a = _parent[a]; |
---|
[220] | 2240 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
| 2241 | } |
---|
| 2242 | } |
---|
[233] | 2243 | if (_g.target(a) == t) return a; |
---|
| 2244 | else return INVALID; |
---|
[220] | 2245 | } |
---|
| 2246 | } |
---|
| 2247 | |
---|
| 2248 | }; |
---|
| 2249 | |
---|
[282] | 2250 | ///Fast arc look-up between given endpoints. |
---|
[220] | 2251 | |
---|
| 2252 | ///Using this class, you can find an arc in a digraph from a given |
---|
[282] | 2253 | ///source to a given target in time <em>O</em>(log<em>d</em>), |
---|
[220] | 2254 | ///where <em>d</em> is the out-degree of the source node. |
---|
| 2255 | /// |
---|
| 2256 | ///It is not possible to find \e all parallel arcs between two nodes. |
---|
| 2257 | ///Use \ref AllArcLookUp for this purpose. |
---|
| 2258 | /// |
---|
[282] | 2259 | ///\warning This class is static, so you should call refresh() (or at |
---|
| 2260 | ///least refresh(Node)) to refresh this data structure whenever the |
---|
| 2261 | ///digraph changes. This is a time consuming (superlinearly proportional |
---|
| 2262 | ///(<em>O</em>(<em>m</em> log<em>m</em>)) to the number of arcs). |
---|
[220] | 2263 | /// |
---|
[606] | 2264 | ///\tparam GR The type of the underlying digraph. |
---|
[220] | 2265 | /// |
---|
| 2266 | ///\sa DynArcLookUp |
---|
| 2267 | ///\sa AllArcLookUp |
---|
[606] | 2268 | template<class GR> |
---|
[220] | 2269 | class ArcLookUp |
---|
| 2270 | { |
---|
[664] | 2271 | TEMPLATE_DIGRAPH_TYPEDEFS(GR); |
---|
| 2272 | |
---|
[220] | 2273 | public: |
---|
[664] | 2274 | |
---|
| 2275 | /// The Digraph type |
---|
[606] | 2276 | typedef GR Digraph; |
---|
[220] | 2277 | |
---|
| 2278 | protected: |
---|
| 2279 | const Digraph &_g; |
---|
| 2280 | typename Digraph::template NodeMap<Arc> _head; |
---|
| 2281 | typename Digraph::template ArcMap<Arc> _left; |
---|
| 2282 | typename Digraph::template ArcMap<Arc> _right; |
---|
| 2283 | |
---|
| 2284 | class ArcLess { |
---|
| 2285 | const Digraph &g; |
---|
| 2286 | public: |
---|
| 2287 | ArcLess(const Digraph &_g) : g(_g) {} |
---|
| 2288 | bool operator()(Arc a,Arc b) const |
---|
| 2289 | { |
---|
| 2290 | return g.target(a)<g.target(b); |
---|
| 2291 | } |
---|
| 2292 | }; |
---|
| 2293 | |
---|
| 2294 | public: |
---|
| 2295 | |
---|
| 2296 | ///Constructor |
---|
| 2297 | |
---|
| 2298 | ///Constructor. |
---|
| 2299 | /// |
---|
| 2300 | ///It builds up the search database, which remains valid until the digraph |
---|
| 2301 | ///changes. |
---|
| 2302 | ArcLookUp(const Digraph &g) :_g(g),_head(g),_left(g),_right(g) {refresh();} |
---|
| 2303 | |
---|
| 2304 | private: |
---|
| 2305 | Arc refreshRec(std::vector<Arc> &v,int a,int b) |
---|
| 2306 | { |
---|
| 2307 | int m=(a+b)/2; |
---|
| 2308 | Arc me=v[m]; |
---|
| 2309 | _left[me] = a<m?refreshRec(v,a,m-1):INVALID; |
---|
| 2310 | _right[me] = m<b?refreshRec(v,m+1,b):INVALID; |
---|
| 2311 | return me; |
---|
| 2312 | } |
---|
| 2313 | public: |
---|
[282] | 2314 | ///Refresh the search data structure at a node. |
---|
[220] | 2315 | |
---|
| 2316 | ///Build up the search database of node \c n. |
---|
| 2317 | /// |
---|
[282] | 2318 | ///It runs in time <em>O</em>(<em>d</em> log<em>d</em>), where <em>d</em> |
---|
| 2319 | ///is the number of the outgoing arcs of \c n. |
---|
[220] | 2320 | void refresh(Node n) |
---|
| 2321 | { |
---|
| 2322 | std::vector<Arc> v; |
---|
| 2323 | for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e); |
---|
| 2324 | if(v.size()) { |
---|
| 2325 | std::sort(v.begin(),v.end(),ArcLess(_g)); |
---|
| 2326 | _head[n]=refreshRec(v,0,v.size()-1); |
---|
| 2327 | } |
---|
| 2328 | else _head[n]=INVALID; |
---|
| 2329 | } |
---|
| 2330 | ///Refresh the full data structure. |
---|
| 2331 | |
---|
| 2332 | ///Build up the full search database. In fact, it simply calls |
---|
| 2333 | ///\ref refresh(Node) "refresh(n)" for each node \c n. |
---|
| 2334 | /// |
---|
[282] | 2335 | ///It runs in time <em>O</em>(<em>m</em> log<em>D</em>), where <em>m</em> is |
---|
| 2336 | ///the number of the arcs in the digraph and <em>D</em> is the maximum |
---|
[220] | 2337 | ///out-degree of the digraph. |
---|
| 2338 | void refresh() |
---|
| 2339 | { |
---|
| 2340 | for(NodeIt n(_g);n!=INVALID;++n) refresh(n); |
---|
| 2341 | } |
---|
| 2342 | |
---|
| 2343 | ///Find an arc between two nodes. |
---|
| 2344 | |
---|
[313] | 2345 | ///Find an arc between two nodes in time <em>O</em>(log<em>d</em>), |
---|
| 2346 | ///where <em>d</em> is the number of outgoing arcs of \c s. |
---|
[282] | 2347 | ///\param s The source node. |
---|
| 2348 | ///\param t The target node. |
---|
[220] | 2349 | ///\return An arc from \c s to \c t if there exists, |
---|
| 2350 | ///\ref INVALID otherwise. |
---|
| 2351 | /// |
---|
| 2352 | ///\warning If you change the digraph, refresh() must be called before using |
---|
| 2353 | ///this operator. If you change the outgoing arcs of |
---|
[282] | 2354 | ///a single node \c n, then \ref refresh(Node) "refresh(n)" is enough. |
---|
[220] | 2355 | Arc operator()(Node s, Node t) const |
---|
| 2356 | { |
---|
| 2357 | Arc e; |
---|
| 2358 | for(e=_head[s]; |
---|
| 2359 | e!=INVALID&&_g.target(e)!=t; |
---|
| 2360 | e = t < _g.target(e)?_left[e]:_right[e]) ; |
---|
| 2361 | return e; |
---|
| 2362 | } |
---|
| 2363 | |
---|
| 2364 | }; |
---|
| 2365 | |
---|
[282] | 2366 | ///Fast look-up of all arcs between given endpoints. |
---|
[220] | 2367 | |
---|
| 2368 | ///This class is the same as \ref ArcLookUp, with the addition |
---|
[282] | 2369 | ///that it makes it possible to find all parallel arcs between given |
---|
| 2370 | ///endpoints. |
---|
[220] | 2371 | /// |
---|
[282] | 2372 | ///\warning This class is static, so you should call refresh() (or at |
---|
| 2373 | ///least refresh(Node)) to refresh this data structure whenever the |
---|
| 2374 | ///digraph changes. This is a time consuming (superlinearly proportional |
---|
| 2375 | ///(<em>O</em>(<em>m</em> log<em>m</em>)) to the number of arcs). |
---|
[220] | 2376 | /// |
---|
[606] | 2377 | ///\tparam GR The type of the underlying digraph. |
---|
[220] | 2378 | /// |
---|
| 2379 | ///\sa DynArcLookUp |
---|
| 2380 | ///\sa ArcLookUp |
---|
[606] | 2381 | template<class GR> |
---|
| 2382 | class AllArcLookUp : public ArcLookUp<GR> |
---|
[220] | 2383 | { |
---|
[606] | 2384 | using ArcLookUp<GR>::_g; |
---|
| 2385 | using ArcLookUp<GR>::_right; |
---|
| 2386 | using ArcLookUp<GR>::_left; |
---|
| 2387 | using ArcLookUp<GR>::_head; |
---|
[220] | 2388 | |
---|
[606] | 2389 | TEMPLATE_DIGRAPH_TYPEDEFS(GR); |
---|
[220] | 2390 | |
---|
[664] | 2391 | typename GR::template ArcMap<Arc> _next; |
---|
[220] | 2392 | |
---|
| 2393 | Arc refreshNext(Arc head,Arc next=INVALID) |
---|
| 2394 | { |
---|
| 2395 | if(head==INVALID) return next; |
---|
| 2396 | else { |
---|
| 2397 | next=refreshNext(_right[head],next); |
---|
| 2398 | _next[head]=( next!=INVALID && _g.target(next)==_g.target(head)) |
---|
| 2399 | ? next : INVALID; |
---|
| 2400 | return refreshNext(_left[head],head); |
---|
| 2401 | } |
---|
| 2402 | } |
---|
| 2403 | |
---|
| 2404 | void refreshNext() |
---|
| 2405 | { |
---|
| 2406 | for(NodeIt n(_g);n!=INVALID;++n) refreshNext(_head[n]); |
---|
| 2407 | } |
---|
| 2408 | |
---|
| 2409 | public: |
---|
[664] | 2410 | |
---|
| 2411 | /// The Digraph type |
---|
| 2412 | typedef GR Digraph; |
---|
| 2413 | |
---|
[220] | 2414 | ///Constructor |
---|
| 2415 | |
---|
| 2416 | ///Constructor. |
---|
| 2417 | /// |
---|
| 2418 | ///It builds up the search database, which remains valid until the digraph |
---|
| 2419 | ///changes. |
---|
[606] | 2420 | AllArcLookUp(const Digraph &g) : ArcLookUp<GR>(g), _next(g) {refreshNext();} |
---|
[220] | 2421 | |
---|
| 2422 | ///Refresh the data structure at a node. |
---|
| 2423 | |
---|
| 2424 | ///Build up the search database of node \c n. |
---|
| 2425 | /// |
---|
[282] | 2426 | ///It runs in time <em>O</em>(<em>d</em> log<em>d</em>), where <em>d</em> is |
---|
[220] | 2427 | ///the number of the outgoing arcs of \c n. |
---|
| 2428 | void refresh(Node n) |
---|
| 2429 | { |
---|
[606] | 2430 | ArcLookUp<GR>::refresh(n); |
---|
[220] | 2431 | refreshNext(_head[n]); |
---|
| 2432 | } |
---|
| 2433 | |
---|
| 2434 | ///Refresh the full data structure. |
---|
| 2435 | |
---|
| 2436 | ///Build up the full search database. In fact, it simply calls |
---|
| 2437 | ///\ref refresh(Node) "refresh(n)" for each node \c n. |
---|
| 2438 | /// |
---|
[282] | 2439 | ///It runs in time <em>O</em>(<em>m</em> log<em>D</em>), where <em>m</em> is |
---|
| 2440 | ///the number of the arcs in the digraph and <em>D</em> is the maximum |
---|
[220] | 2441 | ///out-degree of the digraph. |
---|
| 2442 | void refresh() |
---|
| 2443 | { |
---|
| 2444 | for(NodeIt n(_g);n!=INVALID;++n) refresh(_head[n]); |
---|
| 2445 | } |
---|
| 2446 | |
---|
| 2447 | ///Find an arc between two nodes. |
---|
| 2448 | |
---|
| 2449 | ///Find an arc between two nodes. |
---|
[282] | 2450 | ///\param s The source node. |
---|
| 2451 | ///\param t The target node. |
---|
[220] | 2452 | ///\param prev The previous arc between \c s and \c t. It it is INVALID or |
---|
| 2453 | ///not given, the operator finds the first appropriate arc. |
---|
| 2454 | ///\return An arc from \c s to \c t after \c prev or |
---|
| 2455 | ///\ref INVALID if there is no more. |
---|
| 2456 | /// |
---|
| 2457 | ///For example, you can count the number of arcs from \c u to \c v in the |
---|
| 2458 | ///following way. |
---|
| 2459 | ///\code |
---|
| 2460 | ///AllArcLookUp<ListDigraph> ae(g); |
---|
| 2461 | ///... |
---|
[282] | 2462 | ///int n = 0; |
---|
| 2463 | ///for(Arc a = ae(u,v); a != INVALID; a=ae(u,v,a)) n++; |
---|
[220] | 2464 | ///\endcode |
---|
| 2465 | /// |
---|
[313] | 2466 | ///Finding the first arc take <em>O</em>(log<em>d</em>) time, |
---|
| 2467 | ///where <em>d</em> is the number of outgoing arcs of \c s. Then the |
---|
[220] | 2468 | ///consecutive arcs are found in constant time. |
---|
| 2469 | /// |
---|
| 2470 | ///\warning If you change the digraph, refresh() must be called before using |
---|
| 2471 | ///this operator. If you change the outgoing arcs of |
---|
[282] | 2472 | ///a single node \c n, then \ref refresh(Node) "refresh(n)" is enough. |
---|
[220] | 2473 | /// |
---|
[1149] | 2474 | Arc operator()(Node s, Node t, Arc prev=INVALID) const |
---|
[220] | 2475 | { |
---|
[1149] | 2476 | if(prev==INVALID) |
---|
| 2477 | { |
---|
| 2478 | Arc f=INVALID; |
---|
| 2479 | Arc e; |
---|
| 2480 | for(e=_head[s]; |
---|
| 2481 | e!=INVALID&&_g.target(e)!=t; |
---|
| 2482 | e = t < _g.target(e)?_left[e]:_right[e]) ; |
---|
| 2483 | while(e!=INVALID) |
---|
| 2484 | if(_g.target(e)==t) |
---|
| 2485 | { |
---|
| 2486 | f = e; |
---|
| 2487 | e = _left[e]; |
---|
| 2488 | } |
---|
| 2489 | else e = _right[e]; |
---|
| 2490 | return f; |
---|
| 2491 | } |
---|
| 2492 | else return _next[prev]; |
---|
[220] | 2493 | } |
---|
| 2494 | |
---|
| 2495 | }; |
---|
| 2496 | |
---|
| 2497 | /// @} |
---|
| 2498 | |
---|
| 2499 | } //namespace lemon |
---|
| 2500 | |
---|
| 2501 | #endif |
---|