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Diffstat (limited to 'src/boost/libs/graph/example/last-mod-time.cpp')
-rw-r--r-- | src/boost/libs/graph/example/last-mod-time.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/boost/libs/graph/example/last-mod-time.cpp b/src/boost/libs/graph/example/last-mod-time.cpp new file mode 100644 index 00000000..95d13c7a --- /dev/null +++ b/src/boost/libs/graph/example/last-mod-time.cpp @@ -0,0 +1,108 @@ +//======================================================================= +// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee, +// +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +//======================================================================= + + +/* + IMPORTANT: + ~~~~~~~~~~ + + This example appears to be broken and crashes at runtime, see https://github.com/boostorg/graph/issues/148 + +*/ + +#ifdef _MSC_VER +#define _CRT_SECURE_NO_WARNINGS +#endif + +#include <boost/config.hpp> +#include <iostream> +#include <fstream> +#include <string> +#include <ctime> +#ifdef BOOST_HAS_UNISTD_H +#include <unistd.h> +#endif +#include <sys/stat.h> +#include <boost/graph/adjacency_list.hpp> + +using namespace boost; + +template < typename Graph, typename VertexNamePropertyMap > void +read_graph_file(std::istream & graph_in, std::istream & name_in, + Graph & g, VertexNamePropertyMap name_map) +{ + typedef typename graph_traits < Graph >::vertices_size_type size_type; + size_type n_vertices; + typename graph_traits < Graph >::vertex_descriptor u; + typename property_traits < VertexNamePropertyMap >::value_type name; + + graph_in >> n_vertices; // read in number of vertices + for (size_type i = 0; i < n_vertices; ++i) { // Add n vertices to the graph + u = add_vertex(g); + name_in >> name; + put(name_map, u, name); // ** Attach name property to vertex u ** + } + size_type src, targ; + while (graph_in >> src) // Read in edges + if (graph_in >> targ) + add_edge(src, targ, g); // add an edge to the graph + else + break; +} + + +int +main(int argc, const char** argv) +{ + typedef adjacency_list < listS, // Store out-edges of each vertex in a std::list + vecS, // Store vertex set in a std::vector + directedS, // The graph is directed + property < vertex_name_t, std::string > // Add a vertex property + >graph_type; + + graph_type g; // use default constructor to create empty graph + std::ifstream file_in(argc >= 2 ? argv[1] : "makefile-dependencies.dat"), + name_in(argc >= 2 ? argv[1] : "makefile-target-names.dat"); + if (!file_in) { + std::cerr << "** Error: could not open file makefile-target-names.dat" + << std::endl; + exit(-1); + } + // Obtain internal property map from the graph + property_map < graph_type, vertex_name_t >::type name_map = + get(vertex_name, g); + read_graph_file(file_in, name_in, g, name_map); + + // Create storage for last modified times + std::vector < time_t > last_mod_vec(num_vertices(g)); + // Create nickname for the property map type + typedef iterator_property_map < std::vector < time_t >::iterator, + property_map < graph_type, vertex_index_t >::type, time_t, time_t&> iter_map_t; + // Create last modified time property map + iter_map_t mod_time_map(last_mod_vec.begin(), get(vertex_index, g)); + + property_map < graph_type, vertex_name_t >::type name = get(vertex_name, g); + struct stat stat_buf; + graph_traits < graph_type >::vertex_descriptor u; + typedef graph_traits < graph_type >::vertex_iterator vertex_iter_t; + std::pair < vertex_iter_t, vertex_iter_t > p; + for (p = vertices(g); p.first != p.second; ++p.first) { + u = *p.first; + if (stat(name[u].c_str(), &stat_buf) != 0) + std::cerr << "error in stat() for file " << name[u] << std::endl; + put(mod_time_map, u, stat_buf.st_mtime); + } + + for (p = vertices(g); p.first != p.second; ++p.first) { + std::cout << name[*p.first] << " was last modified at " + << ctime(&mod_time_map[*p.first]); + } + assert(num_vertices(g) == 15); + assert(num_edges(g) == 19); + return 0; +} |