RhodeCode

    /// map reading rule will be abandoned, and the nodes of the graph

    /// will not be constructed, which usually cause that the arc set

    /// could not be read due to lack of node name resolving.

    /// Therefore \c skipArcs() function should also be used, or

    /// \c useNodes() should be used to specify the label of the nodes.

    DigraphReader& skipNodes() {

      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set");

      _skip_nodes = true;

      return *this;

    }

    /// \brief Skips the reading of arc section

    ///

    /// Omit the reading of the arc section. This implies that each arc

    /// map reading rule will be abandoned, and the arcs of the graph

    /// will not be constructed.

    DigraphReader& skipArcs() {

      LEMON_ASSERT(!_skip_arcs, "Skip arcs already set");

      _skip_arcs = true;

      return *this;

    }

    /// @}

  private:

    bool readLine() {

      std::string str;

      while(++line_num, std::getline(*_is, str)) {

        line.clear(); line.str(str);

        char c;

        if (line >> std::ws >> c && c != '#') {

          line.putback(c);

          return true;

        }

      }

      return false;

    }

    bool readSuccess() {

      return static_cast<bool>(*_is);

    }

    void skipSection() {

      char c;

      while (readSuccess() && line >> c && c != '@') {

        readLine();

      }

      line.putback(c);

    }

    void readNodes() {

      std::vector<int> map_index(_node_maps.size());

      int map_num, label_index;

      char c;

      if (!readLine() || !(line >> c) || c == '@') {

        if (readSuccess() && line) line.putback(c);

        if (!_node_maps.empty())

          throw FormatError("Cannot find map names");

        return;

      }

      line.putback(c);

      {

        std::map<std::string, int> maps;

        std::string map;

        int index = 0;

        while (_reader_bits::readToken(line, map)) {

          if (maps.find(map) != maps.end()) {

            std::ostringstream msg;

            msg << "Multiple occurence of node map: " << map;

            throw FormatError(msg.str());

          }

          maps.insert(std::make_pair(map, index));

          ++index;

        }

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

          std::map<std::string, int>::iterator jt =

            maps.find(_node_maps[i].first);

          if (jt == maps.end()) {

            std::ostringstream msg;

            msg << "Map not found: " << _node_maps[i].first;

            throw FormatError(msg.str());

          }

          map_index[i] = jt->second;

        }

        {

          std::map<std::string, int>::iterator jt = maps.find("label");

          if (jt != maps.end()) {

            label_index = jt->second;

          } else {

            label_index = -1;

          }

    /// will not be constructed, which usually cause that the edge set

    /// could not be read due to lack of node name

    /// could not be read due to lack of node name resolving.

    /// Therefore \c skipEdges() function should also be used, or

    /// \c useNodes() should be used to specify the label of the nodes.

    GraphReader& skipNodes() {

      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set");

      _skip_nodes = true;

      return *this;

    }

    /// \brief Skip the reading of edge section

    ///

    /// Omit the reading of the edge section. This implies that each edge

    /// map reading rule will be abandoned, and the edges of the graph

    /// will not be constructed.

    GraphReader& skipEdges() {

      LEMON_ASSERT(!_skip_edges, "Skip edges already set");

      _skip_edges = true;

      return *this;

    }

    /// @}

  private:

    bool readLine() {

      std::string str;

      while(++line_num, std::getline(*_is, str)) {

        line.clear(); line.str(str);

        char c;

        if (line >> std::ws >> c && c != '#') {

          line.putback(c);

          return true;

        }

      }

      return false;

    }

    bool readSuccess() {

      return static_cast<bool>(*_is);

    }

    void skipSection() {

      char c;

      while (readSuccess() && line >> c && c != '@') {

        readLine();

      }

      line.putback(c);

    }

    void readNodes() {

      std::vector<int> map_index(_node_maps.size());

      int map_num, label_index;

      char c;

      if (!readLine() || !(line >> c) || c == '@') {

        if (readSuccess() && line) line.putback(c);

        if (!_node_maps.empty())

          throw FormatError("Cannot find map names");

        return;

      }

      line.putback(c);

      {

        std::map<std::string, int> maps;

        std::string map;

        int index = 0;

        while (_reader_bits::readToken(line, map)) {

          if (maps.find(map) != maps.end()) {

            std::ostringstream msg;

            msg << "Multiple occurence of node map: " << map;

            throw FormatError(msg.str());

          }

          maps.insert(std::make_pair(map, index));

          ++index;

        }

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

          std::map<std::string, int>::iterator jt =

            maps.find(_node_maps[i].first);

          if (jt == maps.end()) {

            std::ostringstream msg;

            msg << "Map not found: " << _node_maps[i].first;

            throw FormatError(msg.str());

          }

          map_index[i] = jt->second;

        }

        {

          std::map<std::string, int>::iterator jt = maps.find("label");

          if (jt != maps.end()) {

            label_index = jt->second;

          } else {

            label_index = -1;

          }

        new _reader_bits::LineSection<Functor>(functor)));

      return *this;

    }

    /// \brief Add a section processor with stream oriented reading

    ///

    /// The first parameter is the type of the section, the second is

    /// a functor, which takes an \c std::istream& and an \c int&

    /// parameter, the latter regard to the line number of stream. The

    /// functor can read the input while the section go on, and the

    /// line number should be modified accordingly.

    template <typename Functor>

    SectionReader& sectionStream(const std::string& type, Functor functor) {

      LEMON_ASSERT(!type.empty(), "Type is empty.");

      LEMON_ASSERT(_sections.find(type) == _sections.end(),

                   "Multiple reading of section.");

      _sections.insert(std::make_pair(type,

         new _reader_bits::StreamSection<Functor>(functor)));

      return *this;

    }

    /// @}

  private:

    bool readLine() {

      std::string str;

      while(++line_num, std::getline(*_is, str)) {

        line.clear(); line.str(str);

        char c;

        if (line >> std::ws >> c && c != '#') {

          line.putback(c);

          return true;

        }

      }

      return false;

    }

    bool readSuccess() {

      return static_cast<bool>(*_is);

    }

    void skipSection() {

      char c;

      while (readSuccess() && line >> c && c != '@') {

        readLine();

      }

      line.putback(c);

    }

  public:

    /// \name Execution of the reader

    /// @{

    /// \brief Start the batch processing

    ///

    /// This function starts the batch processing.

    void run() {

      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");

      std::set<std::string> extra_sections;

      line_num = 0;

      readLine();

      skipSection();

      while (readSuccess()) {

        try {

          char c;

          std::string section, caption;

          line >> c;

          _reader_bits::readToken(line, section);

          _reader_bits::readToken(line, caption);

          if (line >> c)

            throw FormatError("Extra character at the end of line");

          if (extra_sections.find(section) != extra_sections.end()) {

            std::ostringstream msg;

            msg << "Multiple occurence of section: " << section;

            throw FormatError(msg.str());

          }

          Sections::iterator it = _sections.find(section);

          if (it != _sections.end()) {

            extra_sections.insert(section);

            it->second->process(*_is, line_num);

          }

          readLine();

          skipSection();

        } catch (FormatError& error) {

          error.line(line_num);

          error.file(_filename);

          throw;

        }

      return _attributes[i];

    }

    /// @}

    /// \name Extra sections

    /// @{

    /// \brief Gives back the number of extra sections in the file.

    ///

    /// Gives back the number of extra sections in the file.

    int extraSectionNum() const {

      return _extra_sections.size();

    }

    /// \brief Returns the extra section type at the given position.

    ///

    /// Returns the section type at the given position.

    const std::string& extraSection(int i) const {

      return _extra_sections[i];

    }

    /// @}

  private:

    bool readLine() {

      std::string str;

      while(++line_num, std::getline(*_is, str)) {

        line.clear(); line.str(str);

        char c;

        if (line >> std::ws >> c && c != '#') {

          line.putback(c);

          return true;

        }

      }

      return false;

    }

    bool readSuccess() {

      return static_cast<bool>(*_is);

    }

    void skipSection() {

      char c;

      while (readSuccess() && line >> c && c != '@') {

        readLine();

      }

      line.putback(c);

    }

    void readMaps(std::vector<std::string>& maps) {

      char c;

      if (!readLine() || !(line >> c) || c == '@') {

        if (readSuccess() && line) line.putback(c);

        return;

      }

      line.putback(c);

      std::string map;

      while (_reader_bits::readToken(line, map)) {

        maps.push_back(map);

      }

    }

    void readAttributes(std::vector<std::string>& attrs) {

      readLine();

      char c;

      while (readSuccess() && line >> c && c != '@') {

        line.putback(c);

        std::string attr;

        _reader_bits::readToken(line, attr);

        attrs.push_back(attr);

        readLine();

      }

      line.putback(c);

    }

  public:

    /// \name Execution of the contents reader

    /// @{

    /// \brief Starts the reading

    ///

    /// This function starts the reading.

    void run() {

      readLine();

      skipSection();

      while (readSuccess()) {

        char c;

        line >> c;

        std::string section, caption;

        _reader_bits::readToken(line, section);

        _reader_bits::readToken(line, caption);