author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:01:42 +0200 | |
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permissions | -rw-r--r-- |
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//======================================================================= |
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// Copyright 2001 Universite Joseph Fourier, Grenoble. |
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// Author: François Faure |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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//======================================================================= |
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#ifndef BOOST_GRAPH_ADJACENCY_LIST_IO_HPP |
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#define BOOST_GRAPH_ADJACENCY_LIST_IO_HPP |
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#include <iostream> |
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#include <vector> |
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#include <boost/graph/adjacency_list.hpp> |
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#include <cctype> |
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// Method read to parse an adjacency list from an input stream. Examples: |
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// cin >> read( G ); |
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// cin >> read( G, NodePropertySubset(), EdgepropertySubset() ); |
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// |
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// Method write to print an adjacency list to an output stream. Examples: |
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// cout << write( G ); |
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// cout << write( G, NodePropertySubset(), EdgepropertySubset() ); |
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namespace boost { |
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/* outline |
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- basic property input |
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- get property subset |
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- graph parser |
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- property printer |
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- graph printer |
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- user methods |
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*/ |
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//=========================================================================== |
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// basic property input |
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template<class Tag, class Value, class Next> |
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std::istream& operator >> ( std::istream& in, property<Tag,Value,Next>& p ) |
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{ |
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in >> p.m_value >> *(static_cast<Next*>(&p)); // houpla !! |
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return in; |
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} |
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template<class Tag, class Value> |
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std::istream& operator >> ( std::istream& in, property<Tag,Value,no_property>& p ) |
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{ |
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in >> p.m_value; |
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return in; |
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} |
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inline std::istream& operator >> ( std::istream& in, no_property& ) |
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{ |
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return in; |
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} |
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// basic property input |
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//=========================================================================== |
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// get property subsets |
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// get a single property tagged Stag |
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template<class Tag, class Value, class Next, class V, class Stag> |
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void get |
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( property<Tag,Value,Next>& p, const V& v, Stag s ) |
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{ |
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get( *(static_cast<Next*>(&p)),v,s ); |
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} |
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template<class Value, class Next, class V, class Stag> |
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void get |
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( property<Stag,Value,Next>& p, const V& v, Stag ) |
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{ |
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p.m_value = v; |
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} |
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// get a subset of properties tagged Stag |
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template<class Tag, class Value, class Next, |
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class Stag, class Svalue, class Snext> |
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void getSubset |
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( property<Tag,Value,Next>& p, const property<Stag,Svalue,Snext>& s ) |
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{ |
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get( p, s.m_value, Stag() ); |
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getSubset( p, Snext(s) ); |
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} |
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template<class Tag, class Value, class Next, |
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class Stag, class Svalue> |
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void getSubset |
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( property<Tag,Value,Next>& p, const property<Stag,Svalue,no_property>& s) |
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{ |
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get( p, s.m_value, Stag() ); |
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} |
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inline void getSubset |
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( no_property& p, const no_property& s ) |
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{ |
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} |
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#if !defined(BOOST_GRAPH_NO_BUNDLED_PROPERTIES) |
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template<typename T, typename U> |
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void getSubset(T& p, const U& s) |
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{ |
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p = s; |
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} |
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template<typename T> |
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void getSubset(T&, const no_property&) |
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{ |
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} |
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#endif |
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// get property subset |
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//=========================================================================== |
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// graph parser |
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typedef enum{ PARSE_NUM_NODES, PARSE_VERTEX, PARSE_EDGE } GraphParserState; |
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template<class Graph_t, class VertexProperty, class EdgeProperty, class VertexPropertySubset, |
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class EdgePropertySubset> |
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struct GraphParser |
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{ |
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typedef Graph_t Graph; |
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GraphParser( Graph* g ): graph(g) |
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{} |
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GraphParser& operator () ( std::istream& in ) |
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{ |
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typedef typename graph_traits<Graph>::vertex_descriptor Vertex; |
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std::vector<Vertex> nodes; |
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GraphParserState state = PARSE_VERTEX; |
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unsigned int numLine = 1; |
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char c; |
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while ( in.get(c) ) |
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{ |
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if( c== '#' ) skip(in); |
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else if( c== 'n' ) state = PARSE_NUM_NODES; |
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else if( c== 'v' ) state = PARSE_VERTEX; |
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else if( c== 'e' ) state = PARSE_EDGE; |
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else if( c== '\n' ) numLine++; |
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else if( !std::isspace(c) ){ |
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in.putback(c); |
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if( state == PARSE_VERTEX ){ |
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VertexPropertySubset readProp; |
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if( in >> readProp ) |
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{ |
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VertexProperty vp; |
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getSubset( vp, readProp ); |
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nodes.push_back( add_vertex(vp, *graph) ); |
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} |
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else |
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std::cerr<<"read vertex, parse error at line"<<numLine<<std::endl; |
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} |
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else if( state == PARSE_EDGE ) { |
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int source, target; |
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EdgePropertySubset readProp; |
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in >> source >> target; |
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if( in >> readProp ) |
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{ |
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EdgeProperty ep; |
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getSubset( ep, readProp ); |
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add_edge(nodes[source], nodes[target], ep, *graph); |
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} |
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else |
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std::cerr<<"read edge, parse error at line"<<numLine<<std::endl; |
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} |
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else { // state == PARSE_NUM_NODES |
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int n; |
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if( in >> n ){ |
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for( int i=0; i<n; ++i ) |
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nodes.push_back( add_vertex( *graph )); |
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} |
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else |
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std::cerr<<"read num_nodes, parse error at line "<< numLine << std::endl; |
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} |
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} |
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} |
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return (*this); |
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} |
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|
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|
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protected: |
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|
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Graph* graph; |
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|
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void skip( std::istream& in ) |
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{ |
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char c = 0; |
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while( c!='\n' && !in.eof() ) |
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in.get(c); |
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in.putback(c); |
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} |
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}; |
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|
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// parser |
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//======================================================================= |
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// property printer |
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|
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#if defined(BOOST_GRAPH_NO_BUNDLED_PROPERTIES) |
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template<class Graph, class Property> |
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struct PropertyPrinter |
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{ |
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typedef typename Property::value_type Value; |
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typedef typename Property::tag_type Tag; |
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typedef typename Property::next_type Next; |
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|
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PropertyPrinter( const Graph& g ):graph(&g){} |
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template<class Iterator> |
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PropertyPrinter& operator () ( std::ostream& out, Iterator it ) |
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{ |
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typename property_map<Graph,Tag>::type ps = get(Tag(), *graph); |
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out << ps[ *it ] <<" "; |
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PropertyPrinter<Graph,Next> print(*graph); |
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print(out, it); |
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return (*this); |
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} |
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private: |
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const Graph* graph; |
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}; |
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#else |
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template<class Graph, typename Property> |
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struct PropertyPrinter |
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{ |
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PropertyPrinter( const Graph& g ):graph(&g){} |
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template<class Iterator> |
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PropertyPrinter& operator () ( std::ostream& out, Iterator it ) |
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{ |
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out << (*graph)[ *it ] <<" "; |
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return (*this); |
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} |
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private: |
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const Graph* graph; |
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}; |
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template<class Graph, typename Tag, typename Value, typename Next> |
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struct PropertyPrinter<Graph, property<Tag, Value, Next> > |
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{ |
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PropertyPrinter( const Graph& g ):graph(&g){} |
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template<class Iterator> |
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PropertyPrinter& operator () ( std::ostream& out, Iterator it ) |
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{ |
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typename property_map<Graph,Tag>::type ps = get(Tag(), *graph); |
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out << ps[ *it ] <<" "; |
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PropertyPrinter<Graph,Next> print(*graph); |
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print(out, it); |
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return (*this); |
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} |
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private: |
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const Graph* graph; |
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}; |
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#endif |
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template<class Graph> |
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struct PropertyPrinter<Graph, no_property> |
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{ |
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PropertyPrinter( const Graph& ){} |
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template<class Iterator> |
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PropertyPrinter& operator () ( std::ostream&, Iterator it ){ return *this; } |
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}; |
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// property printer |
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//========================================================================= |
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// graph printer |
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template<class Graph_t, class EdgeProperty> |
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struct EdgePrinter |
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{ |
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typedef Graph_t Graph; |
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typedef typename graph_traits<Graph>::vertex_descriptor Vertex; |
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|
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EdgePrinter( const Graph& g ) |
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: graph(g) |
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{} |
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const EdgePrinter& operator () ( std::ostream& out ) const |
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{ |
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// assign indices to vertices |
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std::map<Vertex,int> indices; |
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int num = 0; |
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typename graph_traits<Graph>::vertex_iterator vi; |
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for (vi = vertices(graph).first; vi != vertices(graph).second; ++vi){ |
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indices[*vi] = num++; |
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} |
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|
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// write edges |
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PropertyPrinter<Graph, EdgeProperty> print_Edge(graph); |
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out << "e" << std::endl; |
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typename graph_traits<Graph>::edge_iterator ei; |
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for (ei = edges(graph).first; ei != edges(graph).second; ++ei){ |
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out << indices[source(*ei,graph)] << " " << indices[target(*ei,graph)] << " "; |
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print_Edge(out,ei); |
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out << std::endl; |
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} |
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out << std::endl; |
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return (*this); |
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} |
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protected: |
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const Graph& graph; |
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}; |
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template<class Graph, class V, class E> |
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struct GraphPrinter: public EdgePrinter<Graph,E> |
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{ |
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GraphPrinter( const Graph& g ) |
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: EdgePrinter<Graph,E>(g) |
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{} |
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const GraphPrinter& operator () ( std::ostream& out ) const |
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{ |
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PropertyPrinter<Graph, V> printNode(this->graph); |
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out << "v"<<std::endl; |
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typename graph_traits<Graph>::vertex_iterator vi; |
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for (vi = vertices(this->graph).first; vi != vertices(this->graph).second; ++vi){ |
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printNode(out,vi); |
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out << std::endl; |
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} |
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EdgePrinter<Graph,E>::operator ()( out ); |
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return (*this); |
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} |
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}; |
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|
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template<class Graph, class E> |
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struct GraphPrinter<Graph,no_property,E> |
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: public EdgePrinter<Graph,E> |
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{ |
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GraphPrinter( const Graph& g ) |
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: EdgePrinter<Graph,E>(g) |
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{} |
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|
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const GraphPrinter& operator () ( std::ostream& out ) const |
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{ |
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out << "n "<< num_vertices(this->graph) << std::endl; |
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EdgePrinter<Graph,E>::operator ()( out ); |
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return (*this); |
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} |
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}; |
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|
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// graph printer |
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//========================================================================= |
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// user methods |
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/// input stream for reading a graph |
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template<class Graph, class VP, class EP, class VPS, class EPS> |
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std::istream& operator >> ( std::istream& in, GraphParser<Graph,VP,EP,VPS,EPS> gp ) |
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{ |
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gp(in); |
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return in; |
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} |
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|
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/// graph parser for given subsets of internal vertex and edge properties |
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template<class EL, class VL, class D, class VP, class EP, class GP, class VPS, class EPS> |
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GraphParser<adjacency_list<EL,VL,D,VP,EP,GP>,VP,EP,VPS,EPS> |
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read( adjacency_list<EL,VL,D,VP,EP,GP>& g, VPS vps, EPS eps ) |
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{ |
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return GraphParser<adjacency_list<EL,VL,D,VP,EP,GP>,VP,EP,VPS,EPS>(&g); |
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} |
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|
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/// graph parser for all internal vertex and edge properties |
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template<class EL, class VL, class D, class VP, class EP, class GP> |
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GraphParser<adjacency_list<EL,VL,D,VP,EP,GP>,VP,EP,VP,EP> |
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read( adjacency_list<EL,VL,D,VP,EP,GP>& g ) |
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{ |
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return GraphParser<adjacency_list<EL,VL,D,VP,EP,GP>,VP,EP,VP,EP>(&g); |
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} |
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|
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|
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/// output stream for writing a graph |
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template<class Graph, class VP, class EP> |
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std::ostream& operator << ( std::ostream& out, const GraphPrinter<Graph,VP,EP>& gp ) |
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{ |
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gp(out); |
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return out; |
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} |
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|
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/// write the graph with given property subsets |
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template<class EL, class VL, class D, class VP, class EP, class GP, class VPS, class EPS> |
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GraphPrinter<adjacency_list<EL,VL,D,VP,EP,GP>,VPS,EPS> |
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write( const adjacency_list<EL,VL,D,VP,EP,GP>& g, VPS, EPS ) |
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{ |
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return GraphPrinter<adjacency_list<EL,VL,D,VP,EP,GP>,VPS,EPS>(g); |
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} |
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|
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/// write the graph with all internal vertex and edge properties |
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template<class EL, class VL, class D, class VP, class EP, class GP> |
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GraphPrinter<adjacency_list<EL,VL,D,VP,EP,GP>,VP,EP> |
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write( const adjacency_list<EL,VL,D,VP,EP,GP>& g ) |
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{ |
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return GraphPrinter<adjacency_list<EL,VL,D,VP,EP,GP>,VP,EP>(g); |
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} |
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|
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// user methods |
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//========================================================================= |
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}// boost |
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#endif |