LEMON/LEMON-official Changeset - r189:a63ed81c57ba

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Changeset - r189:a63ed81c57ba

« 188:70694e

190:1e6af6 »

r189:a63ed81c57ba

Fri, 04 Jul 2008 15:21:48

[Not Reviewed]

0 comments (0 inline)

deba@inf.elte.hu
deba@inf.elte.hu

Section readers moved to distinct class

0 1 0

default

1 file changed with 248 insertions and 198 deletions:

lemon/lgf_reader.h

248

198

↑ Collapse diff ↑

lemon/lgf_reader.h

Show inline comments

@@ -416,15 +416,13 @@
 		  ///       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. The readers
 		  /// also can load extra sections with the \c sectionLines() and
-		  /// sectionStream() functions.
+		  /// \c nodes(), \c arcs() or \c attributes() functions.
 		  ///
 		  /// The \c useNodes() and \c useArcs() functions are used to tell the reader
 		  /// that the nodes or arcs should not be constructed (added to the
 		  /// graph) during the reading, but instead the label map of the items
 		  /// are given as a parameter of these functions. An
 		  /// application of these function is multipass reading, which is
@@ -470,15 +468,12 @@
 		    ArcMaps _arc_maps;
 		    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*>
 		      Attributes;
 		    Attributes _attributes;
 		    typedef std::map<std::string, _reader_bits::Section*> Sections;
 		    Sections _sections;
 		    bool _use_nodes;
 		    bool _use_arcs;
 		    bool _skip_nodes;
 		    bool _skip_arcs;
@@ -534,13 +529,12 @@
 		      _attributes.swap(other._attributes);
 		      _nodes_caption = other._nodes_caption;
 		      _arcs_caption = other._arcs_caption;
 		      _attributes_caption = other._attributes_caption;
 		      _sections.swap(other._sections);
+		    }
 		    /// \brief Destructor
 		    ~DigraphReader() {
 		      for (typename NodeMaps::iterator it = _node_maps.begin();
 			   it != _node_maps.end(); ++it) {
@@ -554,17 +548,12 @@
 		      for (typename Attributes::iterator it = _attributes.begin();
 			   it != _attributes.end(); ++it) {
 			delete it->second;
+		      }
 		      for (typename Sections::iterator it = _sections.begin();
 			   it != _sections.end(); ++it) {
 			delete it->second;
+		      }
 		      if (local_is) {
 			delete _is;
+		      }
+		    }
@@ -705,89 +694,12 @@
 		      _attributes_caption = caption;
 		      return *this;
+		    }
 		    /// @}
 		    /// \name Section readers
 		    /// @{
 		    /// \brief Add a section processor with line oriented reading
 		    ///
 		    /// In the \e LGF file extra sections can be placed, which contain
 		    /// any data in arbitrary format. These sections can be read with
 		    /// this function line by line. The first parameter is the type
 		    /// descriptor of the section, the second is a functor, which
 		    /// takes just one \c std::string parameter. At the reading
 		    /// process, each line of the section will be given to the functor
 		    /// object. However, the empty lines and the comment lines are
 		    /// filtered out, and the leading whitespaces are stipped from
 		    /// each processed string.
 		    ///
 		    /// For example let's see a section, which contain several
 		    /// integers, which should be inserted into a vector.
 		    ///\code
 		    ///  @numbers
 		    ///  12 45 23
 		    ///  4
 		    ///  23 6
 		    ///\endcode
 		    ///
 		    /// The functor is implemented as an struct:
 		    ///\code
 		    ///  struct NumberSection {
 		    ///    std::vector<int>& _data;
 		    ///    NumberSection(std::vector<int>& data) : _data(data) {}
 		    ///    void operator()(const std::string& line) {
 		    ///      std::istringstream ls(line);
 		    ///      int value;
 		    ///      while (ls >> value) _data.push_back(value);
 		    ///    }
 		    ///  };
 		    ///
 		    ///  // ...
 		    ///
 		    ///  reader.sectionLines("numbers", NumberSection(vec));
 		    ///\endcode
 		    template <typename Functor>
 		    DigraphReader& sectionLines(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is not empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 				   "Multiple reading of section.");
 		      LEMON_ASSERT(type != "nodes" && type != "arcs" && type != "edges" &&
 				   type != "attributes", "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 		        new _reader_bits::LineSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// \brief Add a section processor with stream oriented reading
 		    ///
 		    /// In the \e LGF file extra sections can be placed, which contain
 		    /// any data in arbitrary format. These sections can be read
 		    /// directly with this function. The first parameter is the type
 		    /// of the section, the second is a functor, which takes an \c
 		    /// std::istream& and an 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>
 		    DigraphReader& sectionStream(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is not empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 				   "Multiple reading of section.");
 		      LEMON_ASSERT(type != "nodes" && type != "arcs" && type != "edges" &&
 				   type != "attributes", "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 			 new _reader_bits::StreamSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// @}
 		    /// \name Using previously constructed node or arc set
 		    /// @{
 		    /// \brief Use previously constructed node set
 		    ///
 		    /// Use previously constructed node set, and specify the node
@@ -1185,13 +1097,12 @@
 			throw DataFormatError("Cannot find file");
+		      }
 		      bool nodes_done = _skip_nodes;
 		      bool arcs_done = _skip_arcs;
 		      bool attributes_done = false;
 		      std::set<std::string> extra_sections;
 		      line_num = 0;
 		      readLine();
 		      skipSection();
 		      while (readSuccess()) {
@@ -1219,22 +1130,12 @@
 			  } else if (section == "attributes" && !attributes_done) {
 			    if (_attributes_caption.empty() || _attributes_caption == caption) {
 			      readAttributes();
 			      attributes_done = true;
+			    }
 			  } else {
 			    if (extra_sections.find(section) != extra_sections.end()) {
 			      std::ostringstream msg;
 			      msg << "Multiple occurence of section " << section;
 			      throw DataFormatError(msg.str().c_str());
+			    }
 			    Sections::iterator it = _sections.find(section);
 			    if (it != _sections.end()) {
 			      extra_sections.insert(section);
 			      it->second->process(*_is, line_num);
+			    }
 			    readLine();
 			    skipSection();
+			  }
 			} catch (DataFormatError& error) {
 			  error.line(line_num);
 			  throw;
@@ -1292,13 +1193,12 @@
 		    typedef _Graph Graph;
 		    TEMPLATE_GRAPH_TYPEDEFS(Graph);
 		  private:
 		    std::istream* _is;
 		    bool local_is;
 		    Graph& _graph;
 		    std::string _nodes_caption;
@@ -1319,15 +1219,12 @@
 		    EdgeMaps _edge_maps;
 		    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*>
 		      Attributes;
 		    Attributes _attributes;
 		    typedef std::map<std::string, _reader_bits::Section*> Sections;
 		    Sections _sections;
 		    bool _use_nodes;
 		    bool _use_edges;
 		    bool _skip_nodes;
 		    bool _skip_edges;
@@ -1383,13 +1280,12 @@
 		      _attributes.swap(other._attributes);
 		      _nodes_caption = other._nodes_caption;
 		      _edges_caption = other._edges_caption;
 		      _attributes_caption = other._attributes_caption;
 		      _sections.swap(other._sections);
+		    }
 		    /// \brief Destructor
 		    ~GraphReader() {
 		      for (typename NodeMaps::iterator it = _node_maps.begin();
 			   it != _node_maps.end(); ++it) {
@@ -1403,17 +1299,12 @@
 		      for (typename Attributes::iterator it = _attributes.begin();
 			   it != _attributes.end(); ++it) {
 			delete it->second;
+		      }
 		      for (typename Sections::iterator it = _sections.begin();
 			   it != _sections.end(); ++it) {
 			delete it->second;
+		      }
 		      if (local_is) {
 			delete _is;
+		      }
+		    }
@@ -1600,89 +1491,12 @@
 		      _attributes_caption = caption;
 		      return *this;
+		    }
 		    /// @}
 		    /// \name Section readers
 		    /// @{
 		    /// \brief Add a section processor with line oriented reading
 		    ///
 		    /// In the \e LGF file extra sections can be placed, which contain
 		    /// any data in arbitrary format. These sections can be read with
 		    /// this function line by line. The first parameter is the type
 		    /// descriptor of the section, the second is a functor, which
 		    /// takes just one \c std::string parameter. At the reading
 		    /// process, each line of the section will be given to the functor
 		    /// object. However, the empty lines and the comment lines are
 		    /// filtered out, and the leading whitespaces are stipped from
 		    /// each processed string.
 		    ///
 		    /// For example let's see a section, which contain several
 		    /// integers, which should be inserted into a vector.
 		    ///\code
 		    ///  @numbers
 		    ///  12 45 23
 		    ///  4
 		    ///  23 6
 		    ///\endcode
 		    ///
 		    /// The functor is implemented as an struct:
 		    ///\code
 		    ///  struct NumberSection {
 		    ///    std::vector<int>& _data;
 		    ///    NumberSection(std::vector<int>& data) : _data(data) {}
 		    ///    void operator()(const std::string& line) {
 		    ///      std::istringstream ls(line);
 		    ///      int value;
 		    ///      while (ls >> value) _data.push_back(value);
 		    ///    }
 		    ///  };
 		    ///
 		    ///  // ...
 		    ///
 		    ///  reader.sectionLines("numbers", NumberSection(vec));
 		    ///\endcode
 		    template <typename Functor>
 		    GraphReader& sectionLines(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is not empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 				   "Multiple reading of section.");
 		      LEMON_ASSERT(type != "nodes" && type != "arcs" && type != "edges" &&
 				   type != "attributes", "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 		        new _reader_bits::LineSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// \brief Add a section processor with stream oriented reading
 		    ///
 		    /// In the \e LGF file extra sections can be placed, which contain
 		    /// any data in arbitrary format. These sections can be read
 		    /// directly with this function. The first parameter is the type
 		    /// of the section, the second is a functor, which takes an \c
 		    /// std::istream& and an 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>
 		    GraphReader& sectionStream(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is not empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 				   "Multiple reading of section.");
 		      LEMON_ASSERT(type != "nodes" && type != "arcs" && type != "edges" &&
 				   type != "attributes", "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 			 new _reader_bits::StreamSection<Functor>(functor)));
 		      return *this;
+		    }
 		    /// @}
 		    /// \name Using previously constructed node or edge set
 		    /// @{
 		    /// \brief Use previously constructed node set
 		    ///
 		    /// Use previously constructed node set, and specify the node
@@ -2078,13 +1892,12 @@
 		      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
 		      bool nodes_done = _skip_nodes;
 		      bool edges_done = _skip_edges;
 		      bool attributes_done = false;
 		      std::set<std::string> extra_sections;
 		      line_num = 0;
 		      readLine();
 		      skipSection();
 		      while (readSuccess()) {
@@ -2112,22 +1925,12 @@
 			  } else if (section == "attributes" && !attributes_done) {
 			    if (_attributes_caption.empty() || _attributes_caption == caption) {
 			      readAttributes();
 			      attributes_done = true;
+			    }
 			  } else {
 			    if (extra_sections.find(section) != extra_sections.end()) {
 			      std::ostringstream msg;
 			      msg << "Multiple occurence of section " << section;
 			      throw DataFormatError(msg.str().c_str());
+			    }
 			    Sections::iterator it = _sections.find(section);
 			    if (it != _sections.end()) {
 			      extra_sections.insert(section);
 			      it->second->process(*_is, line_num);
+			    }
 			    readLine();
 			    skipSection();
+			  }
 			} catch (DataFormatError& error) {
 			  error.line(line_num);
 			  throw;
@@ -2171,12 +1974,259 @@
 		  template <typename Graph>
 		  GraphReader<Graph> graphReader(const char* fn, Graph& graph) {
 		    GraphReader<Graph> tmp(fn, graph);
 		    return tmp;
+		  }
 		  /// \brief Section reader class
 		  ///
 		  /// In the \e LGF file extra sections can be placed, which contain
 		  /// any data in arbitrary format. Such sections can be read with
 		  /// this class. A reading rule can be added with two different
 		  /// functions, with the \c sectionLines() function a functor can
 		  /// process the section line-by-line. While with the \c
 		  /// sectionStream() member the section can be read from an input
 		  /// stream.
 		  class SectionReader {
 		  private:
 		    std::istream* _is;
 		    bool local_is;
 		    typedef std::map<std::string, _reader_bits::Section*> Sections;
 		    Sections _sections;
 		    int line_num;
 		    std::istringstream line;
 		  public:
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section reader, which reads from the given input
 		    /// stream.
 		    SectionReader(std::istream& is)
 		      : _is(&is), local_is(false) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section reader, which reads from the given file.
 		    SectionReader(const std::string& fn)
 		      : _is(new std::ifstream(fn.c_str())), local_is(true) {}
 		    /// \brief Constructor
 		    ///
 		    /// Construct a section reader, which reads from the given file.
 		    SectionReader(const char* fn)
 		      : _is(new std::ifstream(fn)), local_is(true) {}
 		    /// \brief Copy constructor
 		    ///
 		    /// The copy constructor transfers all data from the other reader,
 		    /// therefore the copied reader will not be usable more.
 		    SectionReader(SectionReader& other)
 		      : _is(other._is), local_is(other.local_is) {
 		      other._is = 0;
 		      other.local_is = false;
 		      _sections.swap(other._sections);
+		    }
 		    /// \brief Destructor
 		    ~SectionReader() {
 		      for (Sections::iterator it = _sections.begin();
 			   it != _sections.end(); ++it) {
 			delete it->second;
+		      }
 		      if (local_is) {
 			delete _is;
+		      }
+		    }
 		  private:
 		    SectionReader& operator=(const SectionReader&);
 		  public:
 		    /// \name Section readers
 		    /// @{
 		    /// \brief Add a section processor with line oriented reading
 		    ///
 		    /// The first parameter is the type descriptor of the section, the
 		    /// second is a functor, which takes just one \c std::string
 		    /// parameter. At the reading process, each line of the section
 		    /// will be given to the functor object. However, the empty lines
 		    /// and the comment lines are filtered out, and the leading
 		    /// whitespaces are trimmed from each processed string.
 		    ///
 		    /// For example let's see a section, which contain several
 		    /// integers, which should be inserted into a vector.
 		    ///\code
 		    ///  @numbers
 		    ///  12 45 23
 		    ///  4
 		    ///  23 6
 		    ///\endcode
 		    ///
 		    /// The functor is implemented as an struct:
 		    ///\code
 		    ///  struct NumberSection {
 		    ///    std::vector<int>& _data;
 		    ///    NumberSection(std::vector<int>& data) : _data(data) {}
 		    ///    void operator()(const std::string& line) {
 		    ///      std::istringstream ls(line);
 		    ///      int value;
 		    ///      while (ls >> value) _data.push_back(value);
 		    ///    }
 		    ///  };
 		    ///
 		    ///  // ...
 		    ///
 		    ///  reader.sectionLines("numbers", NumberSection(vec));
 		    ///\endcode
 		    template <typename Functor>
 		    SectionReader& sectionLines(const std::string& type, Functor functor) {
 		      LEMON_ASSERT(!type.empty(), "Type is not empty.");
 		      LEMON_ASSERT(_sections.find(type) == _sections.end(),
 				   "Multiple reading of section.");
 		      _sections.insert(std::make_pair(type,
 		        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 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 not 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 DataFormatError("Extra character on the end of line");
 			  if (extra_sections.find(section) != extra_sections.end()) {
 			    std::ostringstream msg;
 			    msg << "Multiple occurence of section " << section;
 			    throw DataFormatError(msg.str().c_str());
+			  }
 			  Sections::iterator it = _sections.find(section);
 			  if (it != _sections.end()) {
 			    extra_sections.insert(section);
 			    it->second->process(*_is, line_num);
+			  }
 			  readLine();
 			  skipSection();
 			} catch (DataFormatError& error) {
 			  error.line(line_num);
 			  throw;
+			}
+		      }
 		      for (Sections::iterator it = _sections.begin();
 			   it != _sections.end(); ++it) {
 			if (extra_sections.find(it->first) == extra_sections.end()) {
 			  std::ostringstream os;
 			  os << "Cannot find section: " << it->first;
 			  throw DataFormatError(os.str().c_str());
+			}
+		      }
+		    }
 		    /// @}
 		  };
 		  /// \relates SectionReader
 		  inline SectionReader sectionReader(std::istream& is) {
 		    SectionReader tmp(is);
 		    return tmp;
+		  }
 		  /// \relates SectionReader
 		  inline SectionReader sectionReader(const std::string& fn) {
 		    SectionReader tmp(fn);
 		    return tmp;
+		  }
 		  /// \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

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