153 lines
4.0 KiB
C++
153 lines
4.0 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 &
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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
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in;
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}
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}
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typedef adjacency_list <
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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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template < typename Visitor > void
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dfs_v1(const file_dep_graph & g, vertex_t u, default_color_type * color,
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Visitor vis)
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{
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color[u] = gray_color;
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vis.discover_vertex(u, g);
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graph_traits < file_dep_graph >::out_edge_iterator ei, ei_end;
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for (boost::tie(ei, ei_end) = out_edges(u, g); ei != ei_end; ++ei) {
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if (color[target(*ei, g)] == white_color) {
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vis.tree_edge(*ei, g);
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dfs_v1(g, target(*ei, g), color, vis);
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} else if (color[target(*ei, g)] == gray_color)
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vis.back_edge(*ei, g);
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else
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vis.forward_or_cross_edge(*ei, g);
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}
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color[u] = black_color;
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vis.finish_vertex(u, g);
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}
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template < typename Visitor > void
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generic_dfs_v1(const file_dep_graph & g, Visitor vis)
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{
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std::vector < default_color_type > color(num_vertices(g), white_color);
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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 (color[*vi] == white_color)
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dfs_v1(g, *vi, &color[0], vis);
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}
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}
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struct dfs_visitor_default
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{
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template < typename V, typename G > void
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discover_vertex(V, const G &)
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{
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}
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template < typename E, typename G > void
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tree_edge(E, const G &)
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{
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}
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template < typename E, typename G > void
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back_edge(E, const G &)
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{
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}
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template < typename E, typename G > void
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forward_or_cross_edge(E, const G &)
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{
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}
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template < typename V, typename G > void
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finish_vertex(V, const G &)
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{
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}
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};
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struct topo_visitor : public dfs_visitor_default
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{
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topo_visitor(vertex_t * &order) : topo_order(order)
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{
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}
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void
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finish_vertex(vertex_t u, const file_dep_graph &)
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{
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*--topo_order = u;
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}
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vertex_t*& topo_order;
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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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topo_visitor vis(topo_order);
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generic_dfs_v1(g, vis);
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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,
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size_type > >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 >= 2 ? argv[1] : "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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