RhodeCode

      Converter _converter;

    public:

      MapStorage(Map& map, const Converter& converter = Converter())

        : _map(map), _converter(converter) {}

      virtual ~MapStorage() {}

      virtual void set(const Item& item ,const std::string& value) {

        _map.set(item, _converter(value));

      }

    };

              typename _Converter = DefaultConverter<typename _Map::Value> >

    public:

      typedef _Map Map;

      typedef _Converter Converter;

      static const bool dir = _dir;

    private:

      Map& _map;

      Converter _converter;

    public:

                         const Converter& converter = Converter())

        : _graph(graph), _map(map), _converter(converter) {}

      virtual ~GraphArcMapStorage() {}

      virtual void set(const Item& item ,const std::string& value) {

        _map.set(_graph.direct(item, dir), _converter(value));

      }

    };

    class ValueStorageBase {

    public:

      ValueStorageBase() {}

      Value operator()(const std::string& str) {

        typename std::map<std::string, Value>::const_iterator it =

          _map.find(str);

        if (it == _map.end()) {

          std::ostringstream msg;

          msg << "Item not found: " << str;

          throw FormatError(msg.str());

        }

        return it->second;

      }

    };

    struct GraphArcLookUpConverter {

                              const std::map<std::string,

        : _graph(graph), _map(map) {}

        if (str.empty() || (str[0] != '+' && str[0] != '-')) {

          throw FormatError("Item must start with '+' or '-'");

        }

          ::const_iterator it = _map.find(str.substr(1));

        if (it == _map.end()) {

          throw FormatError("Item not found");

        }

        return _graph.direct(it->second, str[0] == '+');

      }

    };

    inline bool isWhiteSpace(char c) {

      return c == ' ' || c == '\t' || c == '\v' ||

        c == '\n' || c == '\r' || c == '\f';

    }

          } else if (!isWhiteSpace(c)) {

            getline(is, line);

            ++line_num;

          }

        }

        if (is) is.putback(c);

        else if (is.eof()) is.clear();

      }

    };

  }

  class DigraphReader;

  /// \ingroup lemon_io

  ///

  /// \brief \ref lgf-format "LGF" reader for directed graphs

  ///

  /// This utility reads an \ref lgf-format "LGF" file.

  ///

  /// The reading method does a batch processing. The user creates a

  /// reader object, then various reading rules can be added to the

  /// reader, and eventually the reading is executed with the \c run()

  /// member function. A map reading rule can be added to the reader

  /// with the \c nodeMap() or \c arcMap() members. An optional

  /// converter parameter can also be added as a standard functor

  /// converting from \c std::string to the value type of the map. If it

  /// is set, it will determine how the tokens in the file should be

  /// converted to the value type of the map. If the functor is not set,

  /// then a default conversion will be used. One map can be read into

  /// multiple map objects at the same time. The \c attribute(), \c

  /// node() and \c arc() functions are used to add attribute reading

  /// rules.

  ///

  ///\code

  ///   nodeMap("coordinates", coord_map).

  ///   arcMap("capacity", cap_map).

  ///   node("source", src).

  ///   node("target", trg).

  ///   attribute("caption", caption).

  ///   run();

  ///\endcode

  ///

  /// By default the reader uses the first section in the file of the

  /// proper type. If a section has an optional name, then it can be

  /// selected for reading by giving an optional name parameter to the

  /// \c nodes(), \c arcs() or \c attributes() functions.

  /// are given as a parameter of these functions. An

  /// application of these functions is multipass reading, which is

  /// important if two \c \@arcs sections must be read from the

  /// file. In this case the first phase would read the node set and one

  /// of the arc sets, while the second phase would read the second arc

  /// set into an \e ArcSet class (\c SmartArcSet or \c ListArcSet).

  /// The previously read label node map should be passed to the \c

  /// useNodes() functions. Another application of multipass reading when

  /// paths are given as a node map or an arc map.

  /// It is impossible to read this in

  /// a single pass, because the arcs are not constructed when the node

  /// maps are read.

  class DigraphReader {

  public:

  private:

    std::istream* _is;

    bool local_is;

    std::string _filename;

    std::string _nodes_caption;

    std::string _arcs_caption;

    std::string _attributes_caption;

    typedef std::map<std::string, Node> NodeIndex;

    NodeIndex _node_index;

    typedef std::map<std::string, Arc> ArcIndex;

    ArcIndex _arc_index;

    typedef std::vector<std::pair<std::string,

      _reader_bits::MapStorageBase<Node>*> > NodeMaps;

    bool _skip_nodes;

    bool _skip_arcs;

    int line_num;

    std::istringstream line;

  public:

    /// \brief Constructor

    ///

    /// Construct a directed graph reader, which reads from the given

    /// input stream.

      : _is(&is), local_is(false), _digraph(digraph),

        _use_nodes(false), _use_arcs(false),

        _skip_nodes(false), _skip_arcs(false) {}

    /// \brief Constructor

    ///

    /// Construct a directed graph reader, which reads from the given

    /// file.

      : _is(new std::ifstream(fn.c_str())), local_is(true),

        _filename(fn), _digraph(digraph),

        _use_nodes(false), _use_arcs(false),

        _skip_nodes(false), _skip_arcs(false) {

      if (!(*_is)) {

        delete _is;

        throw IoError("Cannot open file", fn);

      }

    }

    /// \brief Constructor

    ///

    /// Construct a directed graph reader, which reads from the given

    /// file.

      : _is(new std::ifstream(fn)), local_is(true),

        _filename(fn), _digraph(digraph),

        _use_nodes(false), _use_arcs(false),

        _skip_nodes(false), _skip_arcs(false) {

      if (!(*_is)) {

        delete _is;

        throw IoError("Cannot open file", fn);

      }

    }

    /// \brief Destructor

    ~DigraphReader() {

           it != _attributes.end(); ++it) {

        delete it->second;

      }

      if (local_is) {

        delete _is;

      }

    }

  private:

    DigraphReader(DigraphReader& other)

      : _is(other._is), local_is(other.local_is), _digraph(other._digraph),

        _use_nodes(other._use_nodes), _use_arcs(other._use_arcs),

        _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {

      other._is = 0;

      other.local_is = false;

      _node_index.swap(other._node_index);

      _arc_index.swap(other._arc_index);

        throw FormatError("Section @arcs not found");

      }

      if (!attributes_done && !_attributes.empty()) {

        throw FormatError("Section @attributes not found");

      }

    }

    /// @}

  };

  /// \brief Return a \ref DigraphReader class

  ///

  /// This function just returns a \ref DigraphReader class.

  /// \relates DigraphReader

    return tmp;

  }

  /// \brief Return a \ref DigraphReader class

  ///

  /// This function just returns a \ref DigraphReader class.

  /// \relates DigraphReader

    return tmp;

  }

  class GraphReader;

  /// \ingroup lemon_io

  ///

  /// \brief \ref lgf-format "LGF" reader for undirected graphs

  ///

  /// This utility reads an \ref lgf-format "LGF" file.

  ///

  /// It can be used almost the same way as \c DigraphReader.

  /// The only difference is that this class can handle edges and

  /// edge maps as well as arcs and arc maps.

  ///

  /// The columns in the \c \@edges (or \c \@arcs) section are the

  /// edge maps. However, if there are two maps with the same name

  /// prefixed with \c '+' and \c '-', then these can be read into an

  /// arc map.  Similarly, an attribute can be read into an arc, if

  /// it's value is an edge label prefixed with \c '+' or \c '-'.

  template <typename GR>

  class GraphReader {

  public:

    typedef GR Graph;

  private:

    std::istream* _is;

    bool local_is;

    std::string _filename;

    std::string _nodes_caption;

    std::string _edges_caption;

    std::string _attributes_caption;

    typedef std::map<std::string, Node> NodeIndex;

    NodeIndex _node_index;

    typedef std::map<std::string, Edge> EdgeIndex;

    EdgeIndex _edge_index;

    typedef std::vector<std::pair<std::string,

      _reader_bits::MapStorageBase<Node>*> > NodeMaps;

    bool _skip_nodes;

    bool _skip_edges;

    int line_num;

    std::istringstream line;

  public:

    /// \brief Constructor

    ///

    /// Construct an undirected graph reader, which reads from the given

    /// input stream.

      : _is(&is), local_is(false), _graph(graph),

        _use_nodes(false), _use_edges(false),

        _skip_nodes(false), _skip_edges(false) {}

    /// \brief Constructor

    ///

    /// Construct an undirected graph reader, which reads from the given

    /// file.

      : _is(new std::ifstream(fn.c_str())), local_is(true),

        _filename(fn), _graph(graph),

        _use_nodes(false), _use_edges(false),

        _skip_nodes(false), _skip_edges(false) {

      if (!(*_is)) {

        delete _is;

        throw IoError("Cannot open file", fn);

      }

    }

    /// \brief Constructor

    ///

    /// Construct an undirected graph reader, which reads from the given

    /// file.

      : _is(new std::ifstream(fn)), local_is(true),

        _filename(fn), _graph(graph),

        _use_nodes(false), _use_edges(false),

        _skip_nodes(false), _skip_edges(false) {

      if (!(*_is)) {

        delete _is;

        throw IoError("Cannot open file", fn);

      }

    }

    /// \brief Destructor

    ~GraphReader() {

      for (typename Attributes::iterator it = _attributes.begin();

           it != _attributes.end(); ++it) {

        delete it->second;

      }

      if (local_is) {

        delete _is;

      }

    }

  private:

    GraphReader(GraphReader& other)

      : _is(other._is), local_is(other.local_is), _graph(other._graph),

        _use_nodes(other._use_nodes), _use_edges(other._use_edges),

        _skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) {

      other._is = 0;

      other.local_is = false;

      _node_index.swap(other._node_index);

      _edge_index.swap(other._edge_index);

    }

    /// \brief Arc map reading rule

    ///

    /// Add an arc map reading rule to the reader.

    template <typename Map>

    GraphReader& arcMap(const std::string& caption, Map& map) {

      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();

      _reader_bits::MapStorageBase<Edge>* forward_storage =

        new _reader_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map);

      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));

      _reader_bits::MapStorageBase<Edge>* backward_storage =

      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));

      return *this;

    }

    /// \brief Arc map reading rule

    ///

    /// Add an arc map reading rule with specialized converter to the

    /// reader.

    template <typename Map, typename Converter>

    GraphReader& arcMap(const std::string& caption, Map& map,

                          const Converter& converter = Converter()) {

      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();

      _reader_bits::MapStorageBase<Edge>* forward_storage =

        (_graph, map, converter);

      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));

      _reader_bits::MapStorageBase<Edge>* backward_storage =

        (_graph, map, converter);

      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));

      return *this;

    }

    /// \brief Attribute reading rule

    ///

    /// Add an attribute reading rule to the reader.

    template <typename Value>

    GraphReader& attribute(const std::string& caption, Value& value) {

      _reader_bits::ValueStorageBase* storage =

        new _reader_bits::ValueStorage<Value>(value);

      typedef _reader_bits::MapLookUpConverter<Edge> Converter;

      Converter converter(_edge_index);

      _reader_bits::ValueStorageBase* storage =

        new _reader_bits::ValueStorage<Edge, Converter>(edge, converter);

      _attributes.insert(std::make_pair(caption, storage));

      return *this;

    }

    /// \brief Arc reading rule

    ///

    /// Add an arc reading rule to reader.

    GraphReader& arc(const std::string& caption, Arc& arc) {

      Converter converter(_graph, _edge_index);

      _reader_bits::ValueStorageBase* storage =

        new _reader_bits::ValueStorage<Arc, Converter>(arc, converter);

      _attributes.insert(std::make_pair(caption, storage));

      return *this;

    }

    /// @}

    /// \name Select section by name

    /// @{

      }

      if (!attributes_done && !_attributes.empty()) {

        throw FormatError("Section @attributes not found");

      }

    }

    /// @}

  };

  /// \brief Return a \ref GraphReader class

  ///

  /// This function just returns a \ref GraphReader class.

  /// \relates GraphReader

    return tmp;

  }

  /// \brief Return a \ref GraphReader class

  ///

  /// This function just returns a \ref GraphReader class.

  /// \relates GraphReader

    return tmp;

  }

  class SectionReader;

  SectionReader sectionReader(std::istream& is);

  SectionReader sectionReader(const std::string& fn);

  SectionReader sectionReader(const char* fn);

  /// \ingroup lemon_io

  ///

  /// \brief Section reader class

        if (extra_sections.find(it->first) == extra_sections.end()) {

          std::ostringstream os;

          os << "Cannot find section: " << it->first;

          throw FormatError(os.str());

        }

      }

    }

    /// @}

  };

  /// \brief Return a \ref SectionReader class

  ///

  /// This function just returns a \ref SectionReader class.

  /// \relates SectionReader

    return tmp;

  }

  /// \brief Return a \ref SectionReader class

  ///

  /// This function just returns a \ref SectionReader class.

  /// \relates SectionReader

  inline SectionReader sectionReader(const char* fn) {

    SectionReader tmp(fn);

    return tmp;

  }

  /// \ingroup lemon_io

  ///

  /// \brief Reader for the contents of the \ref lgf-format "LGF" file

  ///

  /// This class can be used to read the sections, the map names and

  /// the attributes from a file. Usually, the LEMON programs know

  /// that, which type of graph, which maps and which attributes

    public:

      StreamSection(const Functor& functor) : _functor(functor) {}

      virtual ~StreamSection() {}

      virtual void process(std::ostream& os) {

        _functor(os);

      }

    };

  }

  class DigraphWriter;

  /// \ingroup lemon_io

  ///

  /// \brief \ref lgf-format "LGF" writer for directed graphs

  ///

  /// This utility writes an \ref lgf-format "LGF" file.

  ///

  /// The writing method does a batch processing. The user creates a

  /// writer object, then various writing rules can be added to the

  /// writer, and eventually the writing is executed with the \c run()

  /// member function. A map writing rule can be added to the writer

  /// with the \c nodeMap() or \c arcMap() members. An optional

  /// converter parameter can also be added as a standard functor

  /// converting from the value type of the map to \c std::string. If it

  /// is set, it will determine how the value type of the map is written to

  /// the output stream. If the functor is not set, then a default

  /// conversion will be used. The \c attribute(), \c node() and \c

  /// arc() functions are used to add attribute writing rules.

  ///

  ///\code

  ///   nodeMap("coordinates", coord_map).

  ///   nodeMap("size", size).

  ///   nodeMap("title", title).

  ///   arcMap("capacity", cap_map).

  ///   node("source", src).

  ///   node("target", trg).

  ///   attribute("caption", caption).

  ///   run();

  ///\endcode

  ///

  ///

  /// By default, the writer does not write additional captions to the

  /// sections, but they can be give as an optional parameter of

  /// the \c nodes(), \c arcs() or \c

  /// attributes() functions.

  ///

  /// The \c skipNodes() and \c skipArcs() functions forbid the

  /// writing of the sections. If two arc sections should be written

  /// to the output, it can be done in two passes, the first pass

  /// writes the node section and the first arc section, then the

  /// second pass skips the node section and writes just the arc

  /// section to the stream. The output stream can be retrieved with

  /// the \c ostream() function, hence the second pass can append its

  /// output to the output of the first pass.

  class DigraphWriter {

  public:

  private:

    std::ostream* _os;

    bool local_os;

    std::string _nodes_caption;

    std::string _arcs_caption;

    std::string _attributes_caption;

    typedef std::map<Node, std::string> NodeIndex;

    NodeIndex _node_index;

    typedef std::map<Arc, std::string> ArcIndex;

    ArcIndex _arc_index;

    typedef std::vector<std::pair<std::string,

      _writer_bits::MapStorageBase<Node>* > > NodeMaps;

      _writer_bits::ValueStorageBase*> > Attributes;

    Attributes _attributes;

    bool _skip_nodes;

    bool _skip_arcs;

  public:

    /// \brief Constructor

    ///

    /// Construct a directed graph writer, which writes to the given

    /// output stream.

      : _os(&os), local_os(false), _digraph(digraph),

        _skip_nodes(false), _skip_arcs(false) {}

    /// \brief Constructor

    ///

    /// Construct a directed graph writer, which writes to the given

    /// output file.

      : _os(new std::ofstream(fn.c_str())), local_os(true), _digraph(digraph),

        _skip_nodes(false), _skip_arcs(false) {

      if (!(*_os)) {

        delete _os;

        throw IoError("Cannot write file", fn);

      }

    }

    /// \brief Constructor

    ///

    /// Construct a directed graph writer, which writes to the given

    /// output file.

      : _os(new std::ofstream(fn)), local_os(true), _digraph(digraph),

        _skip_nodes(false), _skip_arcs(false) {

      if (!(*_os)) {

        delete _os;

        throw IoError("Cannot write file", fn);

      }

    }

    /// \brief Destructor

    ~DigraphWriter() {

      for (typename NodeMaps::iterator it = _node_maps.begin();

           it != _node_maps.end(); ++it) {

      for (typename Attributes::iterator it = _attributes.begin();

           it != _attributes.end(); ++it) {

        delete it->second;

      }

      if (local_os) {

        delete _os;

      }

    }

  private:

    DigraphWriter(DigraphWriter& other)

      : _os(other._os), local_os(other.local_os), _digraph(other._digraph),

        _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {

      other._os = 0;

      other.local_os = false;

      _node_index.swap(other._node_index);

      _arc_index.swap(other._arc_index);

      _node_maps.swap(other._node_maps);

      for (typename NodeMaps::iterator it = _node_maps.begin();

           it != _node_maps.end(); ++it) {

        _writer_bits::writeToken(*_os, it->first) << '\t';

      }

      *_os << std::endl;

      std::vector<Node> nodes;

      for (NodeIt n(_digraph); n != INVALID; ++n) {

        nodes.push_back(n);

      }

      if (label == 0) {

        std::sort(nodes.begin(), nodes.end(), id_less);

      } else {

        label->sort(nodes);

      }

      for (int i = 0; i < static_cast<int>(nodes.size()); ++i) {

        Node n = nodes[i];

        if (label == 0) {

          std::ostringstream os;

          os << _digraph.id(n);

          _writer_bits::writeToken(*_os, os.str());

          *_os << '\t';

      for (typename ArcMaps::iterator it = _arc_maps.begin();

           it != _arc_maps.end(); ++it) {

        _writer_bits::writeToken(*_os, it->first) << '\t';

      }

      *_os << std::endl;

      std::vector<Arc> arcs;

      for (ArcIt n(_digraph); n != INVALID; ++n) {

        arcs.push_back(n);

      }

      if (label == 0) {

        std::sort(arcs.begin(), arcs.end(), id_less);

      } else {

        label->sort(arcs);

      }

      for (int i = 0; i < static_cast<int>(arcs.size()); ++i) {

        Arc a = arcs[i];

        _writer_bits::writeToken(*_os, _node_index.

                                 find(_digraph.source(a))->second);

        *_os << '\t';

        _writer_bits::writeToken(*_os, _node_index.

                                 find(_digraph.target(a))->second);

    }

    /// \brief Give back the stream of the writer

    ///

    /// Give back the stream of the writer.

    std::ostream& ostream() {

      return *_os;

    }

    /// @}

  };

  /// \brief Return a \ref DigraphWriter class

  ///

  /// \relates DigraphWriter

    return tmp;

  }

  /// \brief Return a \ref DigraphWriter class

  ///