93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
//=======================================================================
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// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee,
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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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#include <boost/config.hpp>
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#include <fstream>
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#include <iostream>
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#include <string>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/graph/graph_utility.hpp>
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using namespace boost;
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namespace std
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{
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template < typename T >
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std::istream & operator >> (std::istream & in, std::pair < T, T > &p)
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{
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in >> p.first >> p.second;
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return in;
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}
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}
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typedef adjacency_list < listS, // Store out-edges of each vertex in a std::list
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vecS, // Store vertex set in a std::vector
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directedS // The file dependency graph is directed
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> file_dep_graph;
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typedef graph_traits < file_dep_graph >::vertex_descriptor vertex_t;
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typedef graph_traits < file_dep_graph >::edge_descriptor edge_t;
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void
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topo_sort_dfs(const file_dep_graph & g, vertex_t u, vertex_t * &topo_order,
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int *mark)
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{
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mark[u] = 1; // 1 means visited, 0 means not yet visited
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graph_traits < file_dep_graph >::adjacency_iterator vi, vi_end;
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for (boost::tie(vi, vi_end) = adjacent_vertices(u, g); vi != vi_end; ++vi)
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if (mark[*vi] == 0)
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topo_sort_dfs(g, *vi, topo_order, mark);
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*--topo_order = u;
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}
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void
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topo_sort(const file_dep_graph & g, vertex_t * topo_order)
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{
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std::vector < int >mark(num_vertices(g), 0);
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graph_traits < file_dep_graph >::vertex_iterator vi, vi_end;
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for (boost::tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi)
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if (mark[*vi] == 0)
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topo_sort_dfs(g, *vi, topo_order, &mark[0]);
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}
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int
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main(int argc, const char** argv)
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{
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std::ifstream file_in(argc >= 2 ? argv[1] : "makefile-dependencies.dat");
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typedef graph_traits < file_dep_graph >::vertices_size_type size_type;
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size_type n_vertices;
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file_in >> n_vertices; // read in number of vertices
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std::istream_iterator < std::pair < size_type, size_type > >
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input_begin(file_in), input_end;
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#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
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// VC++ can't handle the iterator constructor
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file_dep_graph g(n_vertices);
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while (input_begin != input_end) {
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size_type i, j;
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boost::tie(i, j) = *input_begin++;
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add_edge(i, j, g);
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}
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#else
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file_dep_graph g(input_begin, input_end, n_vertices);
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#endif
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std::vector < std::string > name(num_vertices(g));
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std::ifstream name_in(argc >= 3 ? argv[2] : "makefile-target-names.dat");
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graph_traits < file_dep_graph >::vertex_iterator vi, vi_end;
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for (boost::tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi)
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name_in >> name[*vi];
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std::vector < vertex_t > order(num_vertices(g));
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topo_sort(g, &order[0] + num_vertices(g));
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for (size_type i = 0; i < num_vertices(g); ++i)
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std::cout << name[order[i]] << std::endl;
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return 0;
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}
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