lemon-0.x: src/lemon/graph_writer.h@7e93d3f0406d

     1 /* -*- C++ -*-

     2  * src/lemon/graph_writer.h - Part of LEMON, a generic C++ optimization library

     3  *

     4  * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

     5  * (Egervary Combinatorial Optimization Research Group, EGRES).

     6  *

     7  * Permission to use, modify and distribute this software is granted

     8  * provided that this copyright notice appears in all copies. For

     9  * precise terms see the accompanying LICENSE file.

    10  *

    11  * This software is provided "AS IS" with no warranty of any kind,

    12  * express or implied, and with no claim as to its suitability for any

    13  * purpose.

    14  *

    15  */

    17 ///\ingroup io_group

    18 ///\file

    19 ///\brief Lemon Graph Format writer.

    21 #ifndef LEMON_GRAPH_WRITER_H

    22 #define LEMON_GRAPH_WRITER_H

    24 #include <iostream>

    25 #include <sstream>

    27 #include <map>

    28 #include <vector>

    30 #include <memory>

    32 #include <lemon/map_utils.h>

    34 #include <lemon/invalid.h>

    35 #include <lemon/error.h>

    38 namespace lemon {

    40   /// \brief Standard WriterTraits for the GraphWriter class.

    41   ///

    42   /// Standard WriterTraits for the GraphWriter class.

    43   /// It defines standard writing method for all type of value.

    44   struct DefaultWriterTraits {

    46     /// \brief Template class for writing an value.

    47     ///

    48     /// Template class for writing an value.

    49     template <typename _Value>

    50     struct Writer {

    51       /// The value type.

    52       typedef _Value Value;

    54       /// \brief Writes a value to the given stream.

    55       ///

    56       /// Writes a value to the given stream.

    57       void write(std::ostream& os, const Value& value) {

    58 	os << value << '\t';

    59       }

    60     };

    62   };

    65   /// \brief Writer class for quoted strings.

    66   ///

    67   /// Writer class for quoted strings. It can process the escape

    68   /// sequences in the string.

    69   class QuotedStringWriter {

    70   public:

    71     typedef std::string Value;

    73     /// \brief Constructor for the writer.

    74     ///

    75     /// Constructor for the writer. If the given parameter is true

    76     /// the writer creates escape sequences from special characters.

    77     QuotedStringWriter(bool _escaped = true) : escaped(_escaped) {}

    79     /// \brief Writes a quoted string to the given stream.

    80     ///

    81     /// Writes a quoted string to the given stream.

    82     void write(std::ostream& os, const std::string& value) {

    83       os << "\"";

    84       if (escaped) {

    85 	std::ostringstream ls;

    86 	for (int i = 0; i < (int)value.size(); ++i) {

    87 	  writeEscape(ls, value[i]);

    88 	}

    89 	os << ls.str();

    90       } else {

    91 	os << value;

    92       }

    93       os << "\"";

    94     }

    96   private:

    98     static void writeEscape(std::ostream& os, char c) {

    99       switch (c) {

   100       case '\\':

   101 	os << "\\\\";

   102 	return;

   103       case '\"':

   104 	os << "\\\"";

   105 	return;

   106       case '\'':

   107 	os << "\\\'";

   108 	return;

   109       case '\?':

   110 	os << "\\\?";

   111 	return;

   112       case '\a':

   113 	os << "\\a";

   114 	return;

   115       case '\b':

   116 	os << "\\b";

   117 	return;

   118       case '\f':

   119 	os << "\\f";

   120 	return;

   121       case '\r':

   122 	os << "\\r";

   123 	return;

   124       case '\n':

   125 	os << "\\n";

   126 	return;

   127       case '\t':

   128 	os << "\\t";

   129 	return;

   130       case '\v':

   131 	os << "\\v";

   132 	return;

   133       default:

   134 	if (c < 0x20) {

   135 	  os << '\\' << std::oct << (int)c;

   136 	} else {

   137 	  os << c;

   138 	}

   139 	return;

   140       }

   141     }

   142   private:

   143     bool escaped;

   144   };

   147   /// \brief The graph writer class.

   148   ///

   149   ///\ingroup io_group

   150   /// The writer class for the graph output.

   151   /// \see DefaultWriterTraits

   152   /// \see QuotedStringWriter

   153   /// \see \ref GraphReader

   154   /// \see \ref graph-io-page

   155   template <typename _Graph, typename _WriterTraits = DefaultWriterTraits>

   156   class GraphWriter {

   157   public:

   159     typedef _Graph Graph;

   160     typedef typename Graph::Node Node;

   161     typedef typename Graph::NodeIt NodeIt;

   162     typedef typename Graph::Edge Edge;

   163     typedef typename Graph::EdgeIt EdgeIt;

   165     typedef _WriterTraits WriterTraits;

   167     /// \brief Construct a new GraphWriter.

   168     ///

   169     /// Construct a new GraphWriter. It writes from the given map,

   170     /// it constructs the given map and it use the given writer as the

   171     /// default skipper.

   172     GraphWriter(std::ostream& _os, const Graph& _graph)

   173       : os(_os), graph(_graph) {}

   176     /// \brief Destruct the graph writer.

   177     ///

   178     /// Destruct the graph writer.

   179     ~GraphWriter() {

   180       for (typename NodeMapWriters::iterator it = node_map_writers.begin();

   181 	   it != node_map_writers.end(); ++it) {

   182 	delete it->second;

   183       }

   185       for (typename EdgeMapWriters::iterator it = edge_map_writers.begin();

   186 	   it != edge_map_writers.end(); ++it) {

   187 	delete it->second;

   188       }

   190     }

   192     // Node map rules

   194     /// \brief Add a new node map writer command for the writer.

   195     ///

   196     /// Add a new node map writer command for the writer.

   197     template <typename Map>

   198     GraphWriter& addNodeMap(std::string name, const Map& map) {

   199       return addNodeMap<typename WriterTraits::template Writer<

   200 	typename Map::Value>, Map>(name, map);

   201     }

   203     /// \brief Add a new node map writer command for the writer.

   204     ///

   205     /// Add a new node map writer command for the writer.

   206     template <typename Writer, typename Map>

   207     GraphWriter& addNodeMap(std::string name, const Map& map,

   208 			      const Writer& writer = Writer()) {

   209       node_map_writers.push_back(

   210         make_pair(name, new MapWriter<Node, Map, Writer>(map, writer)));

   211       return *this;

   212     }

   214     // Edge map rules

   216     /// \brief Add a new edge map writer command for the writer.

   217     ///

   218     /// Add a new edge map writer command for the writer.

   219     template <typename Map>

   220     GraphWriter& addEdgeMap(std::string name, const Map& map) {

   221       return addEdgeMap<typename WriterTraits::template Writer<

   222         typename Map::Value>, Map>(name, map);

   223     }

   226     /// \brief Add a new edge map writer command for the writer.

   227     ///

   228     /// Add a new edge map writer command for the writer.

   229     template <typename Writer, typename Map>

   230     GraphWriter& addEdgeMap(std::string name,

   231 			    const Map& map, const Writer& writer = Writer()) {

   232       edge_map_writers.push_back(make_pair(name,

   233 	new MapWriter<Edge, Map, Writer>(map, writer)));

   234       return *this;

   235     }

   237     /// \brief Add a new labeled node writer for the writer.

   238     ///

   239     /// Add a new labeled node writer for the writer.

   240     GraphWriter& addNode(std::string name, const Node& node) {

   241       node_writers.push_back(make_pair(name, node));

   242       return *this;

   243     }

   245     /// \brief Add a new labeled edge writer for the writer.

   246     ///

   247     /// Add a new labeled edge writer for the writer.

   248     GraphWriter& addEdge(std::string name, const Edge& edge) {

   249       edge_writers.push_back(make_pair(name, edge));

   250       return *this;

   251     }

   253     /// \brief Executes the writer commands.

   254     ///

   255     /// Executes the writer commands.

   256     void run() {

   257       writeNodeSet();

   258       writeEdgeSet();

   259       writeNodes();

   260       writeEdges();

   261       os << "@end" << std::endl;

   262     }

   264   private:

   266     void writeNodeSet() {

   267       if (node_map_writers.size() == 0) return;

   268       os << "@nodeset" << std::endl;

   269       for (int i = 0; i < (int)node_map_writers.size(); ++i) {

   270 	os << node_map_writers[i].first << '\t';

   271       }

   272       os << std::endl;

   273       for (NodeIt it(graph); it != INVALID; ++it) {

   274 	for (int i = 0; i < (int)node_map_writers.size(); ++i) {

   275 	  node_map_writers[i].second->write(os, it);

   276 	}

   277 	os << std::endl;

   278       }

   280     }

   282     void writeEdgeSet() {

   283       if (edge_map_writers.size() == 0) return;

   284       if (node_map_writers.size() == 0) {

   285 	//	ErrorMessage message;

   286 	//	message << "Missing node id map";

   287 	//	throw IOLogicError(message);

   288       }

   289       os << "@edgeset" << std::endl;

   290       os << "\t\t";

   291       for (int i = 0; i < (int)edge_map_writers.size(); ++i) {

   292 	os << edge_map_writers[i].first << '\t';

   293       }

   294       os << std::endl;

   295       for (EdgeIt it(graph); it != INVALID; ++it) {

   296 	node_map_writers[0].second->write(os, graph.source(it));

   297 	node_map_writers[0].second->write(os, graph.target(it));

   298 	for (int i = 0; i < (int)edge_map_writers.size(); ++i) {

   299 	  edge_map_writers[i].second->write(os, it);

   300 	}

   301 	os << std::endl;

   302       }

   303     }

   305     void writeNodes() {

   306       if (node_writers.size() == 0) return;

   307       if (node_map_writers.size() == 0) {

   308 	//	throw Exception() << "Missing node id map";

   309       }

   310       os << "@nodes" << std::endl;

   311       for (int i = 0; i < (int)node_writers.size(); ++i) {

   312 	os << node_writers[i].first << '\t';

   313 	node_map_writers[0].second->write(os, node_writers[i].second);

   314 	os << std::endl;

   315       }

   316     }

   318     void writeEdges() {

   319       if (edge_writers.size() == 0) return;

   320       if (edge_map_writers.size() == 0) {

   321 	//	throw Exception() << "Missing edge id map";

   322       }

   323       os << "@edges" << std::endl;

   324       for (int i = 0; i < (int)edge_writers.size(); ++i) {

   325 	os << edge_writers[i].first << '\t';

   326 	edge_map_writers[0].second->write(os, edge_writers[i].second);

   327 	os << std::endl;

   328       }

   329     }

   331     // Writers

   333     template <class _Item>

   334     class WriterBase {

   335     public:

   336       typedef _Item Item;

   337       virtual void write(std::ostream&, const Item&) = 0;

   338     };

   340     template <class _Item, typename _Map, typename _Writer>

   341     class MapWriter : public WriterBase<_Item> {

   342     public:

   343       typedef _Map Map;

   344       typedef _Writer Writer;

   345       typedef typename Writer::Value Value;

   346       typedef _Item Item;

   348       const Map& map;

   349       Writer writer;

   351       MapWriter(const Map& _map, const Writer& _writer)

   352 	: map(_map), writer(_writer) {}

   355       virtual void write(std::ostream& os, const Item& item) {

   356 	writer.write(os, map[item]);

   357       }

   359     };

   363     typedef std::vector< std::pair<std::string, WriterBase<Node>*> >

   364       NodeMapWriters;

   365     NodeMapWriters node_map_writers;

   367     typedef std::vector< std::pair<std::string, WriterBase<Edge>*> >

   368       EdgeMapWriters;

   369     EdgeMapWriters edge_map_writers;

   371     typedef std::vector<std::pair<std::string, Node> > NodeWriters;

   372     NodeWriters node_writers;

   374     typedef std::vector<std::pair<std::string, Edge> > EdgeWriters;

   375     EdgeWriters edge_writers;

   377     std::ostream& os;

   378     const Graph& graph;

   380   };

   382   /// Ready to use writer function.

   383   template<typename Graph, typename CapacityMap, typename CostMap>

   384   void writeGraph(std::ostream& os, const Graph &g,

   385 		  const CapacityMap& capacity, const typename Graph::Node &s,

   386 		  const typename Graph::Node &t, const CostMap& cost) {

   387     GraphWriter<Graph> reader(os, g);

   388     IdMap<Graph, typename Graph::Node> nodeIdMap(g);

   389     reader.addNodeMap("id", nodeIdMap);

   390     IdMap<Graph, typename Graph::Edge> edgeIdMap(g);

   391     reader.addEdgeMap("id", edgeIdMap);

   392     reader.addEdgeMap("capacity", capacity);

   393     reader.addEdgeMap("cost", cost);

   394     reader.addNode("source", s);

   395     reader.addNode("target", t);

   396     reader.run();

   397   }

   399   /// Ready to use writer function.

   400   template<typename Graph, typename CapacityMap>

   401   void writeGraph(std::ostream& os, const Graph &g,

   402 		  const CapacityMap& capacity, const typename Graph::Node &s,

   403 		  const typename Graph::Node &t) {

   404     GraphWriter<Graph> reader(os, g);

   405     IdMap<Graph, typename Graph::Node> nodeIdMap(g);

   406     reader.addNodeMap("id", nodeIdMap);

   407     IdMap<Graph, typename Graph::Edge> edgeIdMap(g);

   408     reader.addEdgeMap("id", edgeIdMap);

   409     reader.addEdgeMap("capacity", capacity);

   410     reader.addNode("source", s);

   411     reader.addNode("target", t);

   412     reader.run();

   413   }

   415   /// Ready to use writer function.

   416   template<typename Graph, typename CapacityMap>

   417   void writeGraph(std::ostream& os, const Graph &g,

   418 		  const CapacityMap& capacity, const typename Graph::Node &s) {

   419     GraphWriter<Graph> reader(os, g);

   420     IdMap<Graph, typename Graph::Node> nodeIdMap(g);

   421     reader.addNodeMap("id", nodeIdMap);

   422     IdMap<Graph, typename Graph::Edge> edgeIdMap(g);

   423     reader.addEdgeMap("id", edgeIdMap);

   424     reader.addEdgeMap("capacity", capacity);

   425     reader.addNode("source", s);

   426     reader.run();

   427   }

   428   /// Ready to use writer function.

   429   template<typename Graph, typename CapacityMap>

   430   void writeGraph(std::ostream& os, const Graph &g,

   431 		  const CapacityMap& capacity) {

   432     GraphWriter<Graph> reader(os, g);

   433     IdMap<Graph, typename Graph::Node> nodeIdMap(g);

   434     reader.addNodeMap("id", nodeIdMap);

   435     IdMap<Graph, typename Graph::Edge> edgeIdMap(g);

   436     reader.addEdgeMap("id", edgeIdMap);

   437     reader.addEdgeMap("capacity", capacity);

   438     reader.run();

   439   }

   440   /// Ready to use writer function.

   441   template<typename Graph>

   442   void writeGraph(std::ostream& os, const Graph &g) {

   443     GraphWriter<Graph> reader(os, g);

   444     IdMap<Graph, typename Graph::Node> nodeIdMap(g);

   445     reader.addNodeMap("id", nodeIdMap);

   446     IdMap<Graph, typename Graph::Edge> edgeIdMap(g);

   447     reader.addEdgeMap("id", edgeIdMap);

   448     reader.run();

   449   }

   452 }

   454 #endif

author	deba
	Sat, 09 Apr 2005 19:30:49 +0000
changeset 1331	7e93d3f0406d
parent 1297	fde0d12545c1
child 1333	2640cf6547ff
permissions	-rw-r--r--