lemon/lgf_reader.h
author Alpar Juttner <alpar@cs.elte.hu>
Sun, 13 Jul 2008 16:35:05 +0100
changeset 207 574b963d0275
parent 197 5893bacaa720
child 209 765619b7cbb2
permissions -rw-r--r--
Merge
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/* -*- C++ -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library
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 *
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 * Copyright (C) 2003-2008
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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///\ingroup lemon_io
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///\file
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///\brief \ref lgf-format "Lemon Graph Format" reader.
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#ifndef LEMON_LGF_READER_H
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#define LEMON_LGF_READER_H
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include <set>
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#include <map>
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#include <lemon/assert.h>
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#include <lemon/graph_utils.h>
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#include <lemon/lgf_writer.h>
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#include <lemon/concept_check.h>
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#include <lemon/concepts/maps.h>
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namespace lemon {
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  namespace _reader_bits {
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    template <typename Value>
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    struct DefaultConverter {
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      Value operator()(const std::string& str) {
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	std::istringstream is(str);
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	Value value;
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	is >> value;
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	char c;
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	if (is >> std::ws >> c) {
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	  throw DataFormatError("Remaining characters in token");
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	}
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	return value;
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      }
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    };
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    template <>
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    struct DefaultConverter<std::string> {
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      std::string operator()(const std::string& str) {
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	return str;
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      }
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    };
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    template <typename _Item>    
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    class MapStorageBase {
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    public:
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      typedef _Item Item;
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    public:
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      MapStorageBase() {}
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      virtual ~MapStorageBase() {}
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      virtual void set(const Item& item, const std::string& value) = 0;
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    };
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    template <typename _Item, typename _Map, 
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	      typename _Converter = DefaultConverter<typename _Map::Value> >
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    class MapStorage : public MapStorageBase<_Item> {
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    public:
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      typedef _Map Map;
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      typedef _Converter Converter;
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      typedef _Item Item;
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    private:
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      Map& _map;
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      Converter _converter;
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    public:
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      MapStorage(Map& map, const Converter& converter = Converter()) 
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	: _map(map), _converter(converter) {}
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      virtual ~MapStorage() {}
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      virtual void set(const Item& item ,const std::string& value) {
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	_map.set(item, _converter(value));
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      }
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    };
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    template <typename _Graph, bool _dir, typename _Map, 
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	      typename _Converter = DefaultConverter<typename _Map::Value> >
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    class GraphArcMapStorage : public MapStorageBase<typename _Graph::Edge> {
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    public:
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      typedef _Map Map;
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      typedef _Converter Converter;
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      typedef _Graph Graph;
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      typedef typename Graph::Edge Item;
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      static const bool dir = _dir;
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    private:
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      const Graph& _graph;
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      Map& _map;
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      Converter _converter;
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    public:
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      GraphArcMapStorage(const Graph& graph, Map& map, 
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			 const Converter& converter = Converter()) 
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	: _graph(graph), _map(map), _converter(converter) {}
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      virtual ~GraphArcMapStorage() {}
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      virtual void set(const Item& item ,const std::string& value) {
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	_map.set(_graph.direct(item, dir), _converter(value));
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      }
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    };
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    class ValueStorageBase {
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    public:
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      ValueStorageBase() {}
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      virtual ~ValueStorageBase() {}
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      virtual void set(const std::string&) = 0;
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    };
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    template <typename _Value, typename _Converter = DefaultConverter<_Value> >
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    class ValueStorage : public ValueStorageBase {
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    public:
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      typedef _Value Value;
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      typedef _Converter Converter;
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    private:
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      Value& _value;
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      Converter _converter;
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    public:
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      ValueStorage(Value& value, const Converter& converter = Converter())
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 	: _value(value), _converter(converter) {}
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      virtual void set(const std::string& value) {
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	_value = _converter(value);
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      }
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    };
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    template <typename Value>
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    struct MapLookUpConverter {
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      const std::map<std::string, Value>& _map;
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      MapLookUpConverter(const std::map<std::string, Value>& map)
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        : _map(map) {}
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      Value operator()(const std::string& str) {
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        typename std::map<std::string, Value>::const_iterator it =
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          _map.find(str);
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        if (it == _map.end()) {
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          std::ostringstream msg;
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          msg << "Item not found: " << str;
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          throw DataFormatError(msg.str().c_str());
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        }
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        return it->second;
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      }
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    };
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    template <typename Graph>
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    struct GraphArcLookUpConverter {
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      const Graph& _graph;
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      const std::map<std::string, typename Graph::Edge>& _map;
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      GraphArcLookUpConverter(const Graph& graph, 
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			      const std::map<std::string,
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			                     typename Graph::Edge>& map) 
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	: _graph(graph), _map(map) {}
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      typename Graph::Arc operator()(const std::string& str) {
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	if (str.empty() || (str[0] != '+' && str[0] != '-')) {
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	  throw DataFormatError("Item must start with '+' or '-'");
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	}
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	typename std::map<std::string, typename Graph::Edge>
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	  ::const_iterator it = _map.find(str.substr(1));
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	if (it == _map.end()) {
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	  throw DataFormatError("Item not found");
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	}
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	return _graph.direct(it->second, str[0] == '+');
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      }
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    };
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    inline bool isWhiteSpace(char c) {
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      return c == ' ' || c == '\t' || c == '\v' || 
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        c == '\n' || c == '\r' || c == '\f'; 
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    }
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    inline bool isOct(char c) {
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      return '0' <= c && c <='7'; 
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    }
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    inline int valueOct(char c) {
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      LEMON_ASSERT(isOct(c), "The character is not octal.");
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      return c - '0';
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    }
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    inline bool isHex(char c) {
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      return ('0' <= c && c <= '9') || 
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	('a' <= c && c <= 'z') || 
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	('A' <= c && c <= 'Z'); 
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    }
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    inline int valueHex(char c) {
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      LEMON_ASSERT(isHex(c), "The character is not hexadecimal.");
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      if ('0' <= c && c <= '9') return c - '0';
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      if ('a' <= c && c <= 'z') return c - 'a' + 10;
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      return c - 'A' + 10;
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    }
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    inline bool isIdentifierFirstChar(char c) {
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      return ('a' <= c && c <= 'z') ||
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	('A' <= c && c <= 'Z') || c == '_';
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    }
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    inline bool isIdentifierChar(char c) {
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      return isIdentifierFirstChar(c) ||
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	('0' <= c && c <= '9');
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    }
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    inline char readEscape(std::istream& is) {
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      char c;
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      if (!is.get(c))
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	throw DataFormatError("Escape format error");
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      switch (c) {
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      case '\\':
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	return '\\';
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      case '\"':
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	return '\"';
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      case '\'':
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	return '\'';
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      case '\?':
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	return '\?';
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      case 'a':
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	return '\a';
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      case 'b':
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	return '\b';
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      case 'f':
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	return '\f';
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      case 'n':
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	return '\n';
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      case 'r':
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	return '\r';
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      case 't':
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	return '\t';
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      case 'v':
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	return '\v';
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      case 'x':
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	{
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	  int code;
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	  if (!is.get(c) || !isHex(c)) 
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	    throw DataFormatError("Escape format error");
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	  else if (code = valueHex(c), !is.get(c) || !isHex(c)) is.putback(c);
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	  else code = code * 16 + valueHex(c);
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	  return code;
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	}
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      default:
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	{
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	  int code;
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	  if (!isOct(c)) 
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	    throw DataFormatError("Escape format error");
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	  else if (code = valueOct(c), !is.get(c) || !isOct(c)) 
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	    is.putback(c);
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	  else if (code = code * 8 + valueOct(c), !is.get(c) || !isOct(c)) 
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	    is.putback(c);
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	  else code = code * 8 + valueOct(c);
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	  return code;
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	}	      
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      } 
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    }
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    inline std::istream& readToken(std::istream& is, std::string& str) {
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      std::ostringstream os;
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      char c;
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      is >> std::ws;
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      if (!is.get(c)) 
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	return is;
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      if (c == '\"') {
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	while (is.get(c) && c != '\"') {
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	  if (c == '\\') 
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	    c = readEscape(is);
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	  os << c;
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	}
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	if (!is) 
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	  throw DataFormatError("Quoted format error");
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      } else {
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	is.putback(c);
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	while (is.get(c) && !isWhiteSpace(c)) {
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	  if (c == '\\') 
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	    c = readEscape(is);
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	  os << c;
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	}
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	if (!is) {
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	  is.clear();
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	} else {
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	  is.putback(c);
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	}
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      }
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      str = os.str();
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      return is;
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    }
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    class Section {
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    public:
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      virtual ~Section() {}
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      virtual void process(std::istream& is, int& line_num) = 0;
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    };
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    template <typename Functor>
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    class LineSection : public Section {
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    private:
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      Functor _functor;
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    public:
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      LineSection(const Functor& functor) : _functor(functor) {}
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      virtual ~LineSection() {}
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      virtual void process(std::istream& is, int& line_num) {
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	char c;
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	std::string line;
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	while (is.get(c) && c != '@') {
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	  if (c == '\n') {
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	    ++line_num;
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	  } else if (c == '#') {
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	    getline(is, line);
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	    ++line_num;
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	  } else if (!isWhiteSpace(c)) {
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	    is.putback(c);
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	    getline(is, line);
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	    _functor(line);
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	    ++line_num;
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	  }
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	}
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	if (is) is.putback(c);
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	else if (is.eof()) is.clear();
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      }
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    };
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    template <typename Functor>
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    class StreamSection : public Section {
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    private:
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      Functor _functor;
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    public:
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      StreamSection(const Functor& functor) : _functor(functor) {}
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      virtual ~StreamSection() {} 
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      virtual void process(std::istream& is, int& line_num) {
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	_functor(is, line_num);
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	char c;
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	std::string line;
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	while (is.get(c) && c != '@') {
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	  if (c == '\n') {
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	    ++line_num;
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	  } else if (!isWhiteSpace(c)) {
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	    getline(is, line);
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	    ++line_num;
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	  }
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	}
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	if (is) is.putback(c);
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	else if (is.eof()) is.clear();	
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      }
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    };
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  }
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  template <typename Digraph>
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  class DigraphReader;
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  template <typename Digraph>
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  DigraphReader<Digraph> digraphReader(std::istream& is, Digraph& digraph);
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  template <typename Digraph>
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  DigraphReader<Digraph> digraphReader(const std::string& fn, Digraph& digraph);
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  template <typename Digraph>
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  DigraphReader<Digraph> digraphReader(const char *fn, Digraph& digraph);
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  /// \ingroup lemon_io
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  ///  
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  /// \brief \ref lgf-format "LGF" reader for directed graphs
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  ///
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  /// This utility reads an \ref lgf-format "LGF" file.
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  ///
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  /// The reading method does a batch processing. The user creates a
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  /// reader object, then various reading rules can be added to the
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  /// reader, and eventually the reading is executed with the \c run()
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  /// member function. A map reading rule can be added to the reader
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  /// with the \c nodeMap() or \c arcMap() members. An optional
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  /// converter parameter can also be added as a standard functor
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  /// converting from \c std::string to the value type of the map. If it
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  /// is set, it will determine how the tokens in the file should be
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  /// converted to the value type of the map. If the functor is not set,
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  /// then a default conversion will be used. One map can be read into
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  /// multiple map objects at the same time. The \c attribute(), \c
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  /// node() and \c arc() functions are used to add attribute reading
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  /// rules.
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  ///
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  ///\code
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  /// DigraphReader<Digraph>(std::cin, digraph).
kpeter@192
   423
  ///   nodeMap("coordinates", coord_map).
kpeter@192
   424
  ///   arcMap("capacity", cap_map).
kpeter@192
   425
  ///   node("source", src).
kpeter@192
   426
  ///   node("target", trg).
kpeter@192
   427
  ///   attribute("caption", caption).
kpeter@192
   428
  ///   run();
alpar@156
   429
  ///\endcode
alpar@156
   430
  ///
alpar@156
   431
  /// By default the reader uses the first section in the file of the
alpar@156
   432
  /// proper type. If a section has an optional name, then it can be
deba@162
   433
  /// selected for reading by giving an optional name parameter to the
deba@189
   434
  /// \c nodes(), \c arcs() or \c attributes() functions.
alpar@156
   435
  ///
alpar@156
   436
  /// The \c useNodes() and \c useArcs() functions are used to tell the reader
alpar@156
   437
  /// that the nodes or arcs should not be constructed (added to the
alpar@156
   438
  /// graph) during the reading, but instead the label map of the items
alpar@156
   439
  /// are given as a parameter of these functions. An
kpeter@192
   440
  /// application of these functions is multipass reading, which is
kpeter@192
   441
  /// important if two \c \@arcs sections must be read from the
kpeter@192
   442
  /// file. In this case the first phase would read the node set and one
alpar@156
   443
  /// of the arc sets, while the second phase would read the second arc
alpar@156
   444
  /// set into an \e ArcSet class (\c SmartArcSet or \c ListArcSet).
alpar@156
   445
  /// The previously read label node map should be passed to the \c
alpar@156
   446
  /// useNodes() functions. Another application of multipass reading when
kpeter@192
   447
  /// paths are given as a node map or an arc map. It is impossible to read this in
alpar@156
   448
  /// a single pass, because the arcs are not constructed when the node
alpar@156
   449
  /// maps are read.
deba@127
   450
  template <typename _Digraph>
deba@127
   451
  class DigraphReader {
deba@127
   452
  public:
deba@127
   453
deba@127
   454
    typedef _Digraph Digraph;
deba@148
   455
    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
deba@127
   456
    
deba@127
   457
  private:
deba@127
   458
deba@127
   459
deba@127
   460
    std::istream* _is;
deba@127
   461
    bool local_is;
deba@127
   462
deba@127
   463
    Digraph& _digraph;
deba@127
   464
deba@127
   465
    std::string _nodes_caption;
deba@127
   466
    std::string _arcs_caption;
deba@127
   467
    std::string _attributes_caption;
deba@127
   468
deba@127
   469
    typedef std::map<std::string, Node> NodeIndex;
deba@127
   470
    NodeIndex _node_index;
deba@127
   471
    typedef std::map<std::string, Arc> ArcIndex;
deba@127
   472
    ArcIndex _arc_index;
deba@127
   473
    
deba@127
   474
    typedef std::vector<std::pair<std::string, 
deba@127
   475
      _reader_bits::MapStorageBase<Node>*> > NodeMaps;    
deba@127
   476
    NodeMaps _node_maps; 
deba@127
   477
deba@127
   478
    typedef std::vector<std::pair<std::string,
deba@127
   479
      _reader_bits::MapStorageBase<Arc>*> >ArcMaps;
deba@127
   480
    ArcMaps _arc_maps;
deba@127
   481
deba@127
   482
    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*> 
deba@127
   483
      Attributes;
deba@127
   484
    Attributes _attributes;
deba@127
   485
deba@127
   486
    bool _use_nodes;
deba@127
   487
    bool _use_arcs;
deba@127
   488
deba@188
   489
    bool _skip_nodes;
deba@188
   490
    bool _skip_arcs;
deba@188
   491
deba@127
   492
    int line_num;
deba@127
   493
    std::istringstream line;
deba@127
   494
deba@127
   495
  public:
deba@127
   496
alpar@156
   497
    /// \brief Constructor
alpar@156
   498
    ///
alpar@156
   499
    /// Construct a directed graph reader, which reads from the given
alpar@156
   500
    /// input stream.
deba@127
   501
    DigraphReader(std::istream& is, Digraph& digraph) 
deba@127
   502
      : _is(&is), local_is(false), _digraph(digraph),
deba@188
   503
	_use_nodes(false), _use_arcs(false),
deba@188
   504
	_skip_nodes(false), _skip_arcs(false) {}
deba@127
   505
alpar@156
   506
    /// \brief Constructor
alpar@156
   507
    ///
alpar@156
   508
    /// Construct a directed graph reader, which reads from the given
alpar@156
   509
    /// file.
deba@127
   510
    DigraphReader(const std::string& fn, Digraph& digraph) 
deba@127
   511
      : _is(new std::ifstream(fn.c_str())), local_is(true), _digraph(digraph),
deba@188
   512
    	_use_nodes(false), _use_arcs(false),
deba@188
   513
	_skip_nodes(false), _skip_arcs(false) {}
alpar@156
   514
    
alpar@156
   515
    /// \brief Constructor
alpar@156
   516
    ///
alpar@156
   517
    /// Construct a directed graph reader, which reads from the given
alpar@156
   518
    /// file.
deba@127
   519
    DigraphReader(const char* fn, Digraph& digraph) 
deba@127
   520
      : _is(new std::ifstream(fn)), local_is(true), _digraph(digraph),
deba@188
   521
    	_use_nodes(false), _use_arcs(false),
deba@188
   522
	_skip_nodes(false), _skip_arcs(false) {}
deba@127
   523
alpar@156
   524
    /// \brief Destructor
deba@127
   525
    ~DigraphReader() {
deba@127
   526
      for (typename NodeMaps::iterator it = _node_maps.begin(); 
deba@127
   527
	   it != _node_maps.end(); ++it) {
deba@127
   528
	delete it->second;
deba@127
   529
      }
deba@127
   530
deba@127
   531
      for (typename ArcMaps::iterator it = _arc_maps.begin(); 
deba@127
   532
	   it != _arc_maps.end(); ++it) {
deba@127
   533
	delete it->second;
deba@127
   534
      }
deba@127
   535
deba@127
   536
      for (typename Attributes::iterator it = _attributes.begin(); 
deba@127
   537
	   it != _attributes.end(); ++it) {
deba@127
   538
	delete it->second;
deba@127
   539
      }
deba@127
   540
deba@127
   541
      if (local_is) {
deba@127
   542
	delete _is;
deba@127
   543
      }
deba@127
   544
deba@127
   545
    }
deba@127
   546
deba@127
   547
  private:
deba@190
   548
deba@190
   549
    friend DigraphReader<Digraph> digraphReader<>(std::istream& is, 
deba@190
   550
						  Digraph& digraph);    
deba@190
   551
    friend DigraphReader<Digraph> digraphReader<>(const std::string& fn, 
deba@190
   552
						  Digraph& digraph);   
deba@190
   553
    friend DigraphReader<Digraph> digraphReader<>(const char *fn, 
deba@190
   554
						  Digraph& digraph);    
deba@190
   555
deba@190
   556
    DigraphReader(DigraphReader& other) 
deba@190
   557
      : _is(other._is), local_is(other.local_is), _digraph(other._digraph),
deba@190
   558
	_use_nodes(other._use_nodes), _use_arcs(other._use_arcs),
deba@190
   559
	_skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {
deba@190
   560
deba@190
   561
      other._is = 0;
deba@190
   562
      other.local_is = false;
deba@190
   563
      
deba@190
   564
      _node_index.swap(other._node_index);
deba@190
   565
      _arc_index.swap(other._arc_index);
deba@190
   566
deba@190
   567
      _node_maps.swap(other._node_maps);
deba@190
   568
      _arc_maps.swap(other._arc_maps);
deba@190
   569
      _attributes.swap(other._attributes);
deba@190
   570
deba@190
   571
      _nodes_caption = other._nodes_caption;
deba@190
   572
      _arcs_caption = other._arcs_caption;
deba@190
   573
      _attributes_caption = other._attributes_caption;
deba@190
   574
deba@190
   575
    }
deba@190
   576
deba@127
   577
    DigraphReader& operator=(const DigraphReader&);
deba@127
   578
deba@127
   579
  public:
deba@127
   580
alpar@156
   581
    /// \name Reading rules
alpar@156
   582
    /// @{
alpar@156
   583
    
alpar@156
   584
    /// \brief Node map reading rule
alpar@156
   585
    ///
alpar@156
   586
    /// Add a node map reading rule to the reader.
deba@127
   587
    template <typename Map>
deba@127
   588
    DigraphReader& nodeMap(const std::string& caption, Map& map) {
deba@127
   589
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
deba@127
   590
      _reader_bits::MapStorageBase<Node>* storage = 
deba@127
   591
	new _reader_bits::MapStorage<Node, Map>(map);
deba@127
   592
      _node_maps.push_back(std::make_pair(caption, storage));
deba@127
   593
      return *this;
deba@127
   594
    }
deba@127
   595
alpar@156
   596
    /// \brief Node map reading rule
alpar@156
   597
    ///
alpar@156
   598
    /// Add a node map reading rule with specialized converter to the
alpar@156
   599
    /// reader.
deba@127
   600
    template <typename Map, typename Converter>
deba@127
   601
    DigraphReader& nodeMap(const std::string& caption, Map& map, 
deba@127
   602
			   const Converter& converter = Converter()) {
deba@127
   603
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
deba@127
   604
      _reader_bits::MapStorageBase<Node>* storage = 
deba@127
   605
	new _reader_bits::MapStorage<Node, Map, Converter>(map, converter);
deba@127
   606
      _node_maps.push_back(std::make_pair(caption, storage));
deba@127
   607
      return *this;
deba@127
   608
    }
deba@127
   609
alpar@156
   610
    /// \brief Arc map reading rule
alpar@156
   611
    ///
alpar@156
   612
    /// Add an arc map reading rule to the reader.
deba@127
   613
    template <typename Map>
deba@127
   614
    DigraphReader& arcMap(const std::string& caption, Map& map) {
deba@127
   615
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
deba@127
   616
      _reader_bits::MapStorageBase<Arc>* storage = 
deba@127
   617
	new _reader_bits::MapStorage<Arc, Map>(map);
deba@127
   618
      _arc_maps.push_back(std::make_pair(caption, storage));
deba@127
   619
      return *this;
deba@127
   620
    }
deba@127
   621
alpar@156
   622
    /// \brief Arc map reading rule
alpar@156
   623
    ///
alpar@156
   624
    /// Add an arc map reading rule with specialized converter to the
alpar@156
   625
    /// reader.
deba@127
   626
    template <typename Map, typename Converter>
deba@127
   627
    DigraphReader& arcMap(const std::string& caption, Map& map, 
deba@127
   628
			  const Converter& converter = Converter()) {
deba@127
   629
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
deba@127
   630
      _reader_bits::MapStorageBase<Arc>* storage = 
deba@127
   631
	new _reader_bits::MapStorage<Arc, Map, Converter>(map, converter);
deba@127
   632
      _arc_maps.push_back(std::make_pair(caption, storage));
deba@127
   633
      return *this;
deba@127
   634
    }
deba@127
   635
alpar@156
   636
    /// \brief Attribute reading rule
alpar@156
   637
    ///
alpar@156
   638
    /// Add an attribute reading rule to the reader.
deba@127
   639
    template <typename Value>
deba@127
   640
    DigraphReader& attribute(const std::string& caption, Value& value) {
deba@127
   641
      _reader_bits::ValueStorageBase* storage = 
deba@127
   642
	new _reader_bits::ValueStorage<Value>(value);
deba@127
   643
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   644
      return *this;
deba@127
   645
    }
deba@127
   646
alpar@156
   647
    /// \brief Attribute reading rule
alpar@156
   648
    ///
alpar@156
   649
    /// Add an attribute reading rule with specialized converter to the
alpar@156
   650
    /// reader.
deba@127
   651
    template <typename Value, typename Converter>
deba@127
   652
    DigraphReader& attribute(const std::string& caption, Value& value, 
deba@127
   653
			     const Converter& converter = Converter()) {
deba@127
   654
      _reader_bits::ValueStorageBase* storage = 
deba@127
   655
	new _reader_bits::ValueStorage<Value, Converter>(value, converter);
deba@127
   656
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   657
      return *this;
deba@127
   658
    }
deba@127
   659
alpar@156
   660
    /// \brief Node reading rule
alpar@156
   661
    ///
alpar@156
   662
    /// Add a node reading rule to reader.
deba@127
   663
    DigraphReader& node(const std::string& caption, Node& node) {
deba@127
   664
      typedef _reader_bits::MapLookUpConverter<Node> Converter;
deba@127
   665
      Converter converter(_node_index);
deba@127
   666
      _reader_bits::ValueStorageBase* storage = 
deba@127
   667
	new _reader_bits::ValueStorage<Node, Converter>(node, converter);
deba@127
   668
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   669
      return *this;
deba@127
   670
    }
deba@127
   671
alpar@156
   672
    /// \brief Arc reading rule
alpar@156
   673
    ///
alpar@156
   674
    /// Add an arc reading rule to reader.
deba@127
   675
    DigraphReader& arc(const std::string& caption, Arc& arc) {
deba@127
   676
      typedef _reader_bits::MapLookUpConverter<Arc> Converter;
deba@127
   677
      Converter converter(_arc_index);
deba@127
   678
      _reader_bits::ValueStorageBase* storage = 
deba@127
   679
	new _reader_bits::ValueStorage<Arc, Converter>(arc, converter);
deba@127
   680
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   681
      return *this;
deba@127
   682
    }
deba@127
   683
alpar@156
   684
    /// @}
alpar@156
   685
alpar@156
   686
    /// \name Select section by name
alpar@156
   687
    /// @{
alpar@156
   688
alpar@156
   689
    /// \brief Set \c \@nodes section to be read
alpar@156
   690
    ///
alpar@156
   691
    /// Set \c \@nodes section to be read
deba@127
   692
    DigraphReader& nodes(const std::string& caption) {
deba@127
   693
      _nodes_caption = caption;
deba@127
   694
      return *this;
deba@127
   695
    }
deba@127
   696
alpar@156
   697
    /// \brief Set \c \@arcs section to be read
alpar@156
   698
    ///
alpar@156
   699
    /// Set \c \@arcs section to be read
deba@127
   700
    DigraphReader& arcs(const std::string& caption) {
deba@127
   701
      _arcs_caption = caption;
deba@127
   702
      return *this;
deba@127
   703
    }
deba@127
   704
alpar@156
   705
    /// \brief Set \c \@attributes section to be read
alpar@156
   706
    ///
alpar@156
   707
    /// Set \c \@attributes section to be read
deba@127
   708
    DigraphReader& attributes(const std::string& caption) {
deba@127
   709
      _attributes_caption = caption;
deba@127
   710
      return *this;
deba@127
   711
    }
deba@127
   712
alpar@156
   713
    /// @}
alpar@156
   714
alpar@156
   715
    /// \name Using previously constructed node or arc set
alpar@156
   716
    /// @{
alpar@156
   717
alpar@156
   718
    /// \brief Use previously constructed node set
alpar@156
   719
    ///
alpar@156
   720
    /// Use previously constructed node set, and specify the node
alpar@156
   721
    /// label map.
deba@127
   722
    template <typename Map>
deba@127
   723
    DigraphReader& useNodes(const Map& map) {
deba@127
   724
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
deba@127
   725
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); 
deba@127
   726
      _use_nodes = true;
deba@127
   727
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@127
   728
      for (NodeIt n(_digraph); n != INVALID; ++n) {
deba@127
   729
	_node_index.insert(std::make_pair(converter(map[n]), n));
deba@127
   730
      }
deba@127
   731
      return *this;
deba@127
   732
    }
deba@127
   733
alpar@156
   734
    /// \brief Use previously constructed node set
alpar@156
   735
    ///
alpar@156
   736
    /// Use previously constructed node set, and specify the node
alpar@156
   737
    /// label map and a functor which converts the label map values to
kpeter@192
   738
    /// \c std::string.
deba@127
   739
    template <typename Map, typename Converter>
deba@127
   740
    DigraphReader& useNodes(const Map& map, 
deba@127
   741
			    const Converter& converter = Converter()) {
deba@127
   742
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
deba@127
   743
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); 
deba@127
   744
      _use_nodes = true;
deba@127
   745
      for (NodeIt n(_digraph); n != INVALID; ++n) {
deba@127
   746
	_node_index.insert(std::make_pair(converter(map[n]), n));
deba@127
   747
      }
deba@127
   748
      return *this;
deba@127
   749
    }
deba@127
   750
alpar@156
   751
    /// \brief Use previously constructed arc set
alpar@156
   752
    ///
alpar@156
   753
    /// Use previously constructed arc set, and specify the arc
alpar@156
   754
    /// label map.
deba@127
   755
    template <typename Map>
deba@127
   756
    DigraphReader& useArcs(const Map& map) {
deba@127
   757
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
deba@127
   758
      LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member");
deba@127
   759
      _use_arcs = true;
deba@127
   760
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@127
   761
      for (ArcIt a(_digraph); a != INVALID; ++a) {
deba@127
   762
	_arc_index.insert(std::make_pair(converter(map[a]), a));
deba@127
   763
      }
deba@127
   764
      return *this;
deba@127
   765
    }
deba@127
   766
alpar@156
   767
    /// \brief Use previously constructed arc set
alpar@156
   768
    ///
alpar@156
   769
    /// Use previously constructed arc set, and specify the arc
alpar@156
   770
    /// label map and a functor which converts the label map values to
kpeter@192
   771
    /// \c std::string.
deba@127
   772
    template <typename Map, typename Converter>
deba@127
   773
    DigraphReader& useArcs(const Map& map, 
deba@188
   774
			   const Converter& converter = Converter()) {
deba@127
   775
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
deba@127
   776
      LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member"); 
deba@127
   777
      _use_arcs = true;
deba@127
   778
      for (ArcIt a(_digraph); a != INVALID; ++a) {
deba@127
   779
	_arc_index.insert(std::make_pair(converter(map[a]), a));
deba@127
   780
      }
deba@127
   781
      return *this;
deba@127
   782
    }
deba@127
   783
deba@188
   784
    /// \brief Skips the reading of node section
deba@188
   785
    ///
deba@188
   786
    /// Omit the reading of the node section. This implies that each node
kpeter@192
   787
    /// map reading rule will be abandoned, and the nodes of the graph
deba@188
   788
    /// will not be constructed, which usually cause that the arc set
kpeter@192
   789
    /// could not be read due to lack of node name resolving.
kpeter@192
   790
    /// Therefore \c skipArcs() function should also be used, or
kpeter@192
   791
    /// \c useNodes() should be used to specify the label of the nodes.
deba@188
   792
    DigraphReader& skipNodes() {
deba@188
   793
      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set"); 
deba@188
   794
      _skip_nodes = true;
deba@188
   795
      return *this;
deba@188
   796
    }
deba@188
   797
deba@188
   798
    /// \brief Skips the reading of arc section
deba@188
   799
    ///
deba@188
   800
    /// Omit the reading of the arc section. This implies that each arc
kpeter@192
   801
    /// map reading rule will be abandoned, and the arcs of the graph
deba@188
   802
    /// will not be constructed.
deba@188
   803
    DigraphReader& skipArcs() {
deba@188
   804
      LEMON_ASSERT(!_skip_arcs, "Skip arcs already set"); 
deba@188
   805
      _skip_arcs = true;
deba@188
   806
      return *this;
deba@188
   807
    }
deba@188
   808
alpar@156
   809
    /// @}
alpar@156
   810
deba@127
   811
  private:
deba@127
   812
deba@127
   813
    bool readLine() {
deba@127
   814
      std::string str;
deba@127
   815
      while(++line_num, std::getline(*_is, str)) {
deba@127
   816
	line.clear(); line.str(str);
deba@127
   817
	char c;
deba@127
   818
	if (line >> std::ws >> c && c != '#') {
deba@127
   819
	  line.putback(c);
deba@127
   820
	  return true;
deba@127
   821
	}
deba@127
   822
      }
deba@127
   823
      return false;
deba@127
   824
    }
deba@127
   825
deba@127
   826
    bool readSuccess() {
deba@127
   827
      return static_cast<bool>(*_is);
deba@127
   828
    }
deba@127
   829
    
deba@127
   830
    void skipSection() {
deba@127
   831
      char c;
deba@127
   832
      while (readSuccess() && line >> c && c != '@') {
deba@127
   833
	readLine();
deba@127
   834
      }
deba@127
   835
      line.putback(c);
deba@127
   836
    }
deba@127
   837
deba@127
   838
    void readNodes() {
deba@127
   839
deba@127
   840
      std::vector<int> map_index(_node_maps.size());
deba@127
   841
      int map_num, label_index;
deba@127
   842
deba@186
   843
      char c;
deba@186
   844
      if (!readLine() || !(line >> c) || c == '@') {
deba@186
   845
	if (readSuccess() && line) line.putback(c);
deba@186
   846
	if (!_node_maps.empty()) 
deba@186
   847
	  throw DataFormatError("Cannot find map names");
deba@186
   848
	return;
deba@186
   849
      }
deba@186
   850
      line.putback(c);
deba@186
   851
deba@127
   852
      {
deba@127
   853
	std::map<std::string, int> maps;
deba@127
   854
	
deba@127
   855
	std::string map;
deba@127
   856
	int index = 0;
alpar@156
   857
	while (_reader_bits::readToken(line, map)) {
deba@127
   858
	  if (maps.find(map) != maps.end()) {
deba@127
   859
	    std::ostringstream msg;
deba@127
   860
	    msg << "Multiple occurence of node map: " << map;
deba@127
   861
	    throw DataFormatError(msg.str().c_str());
deba@127
   862
	  }
deba@127
   863
	  maps.insert(std::make_pair(map, index));
deba@127
   864
	  ++index;
deba@127
   865
	}
deba@127
   866
	
deba@127
   867
	for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
deba@127
   868
	  std::map<std::string, int>::iterator jt = 
deba@127
   869
	    maps.find(_node_maps[i].first);
deba@127
   870
	  if (jt == maps.end()) {
deba@127
   871
	    std::ostringstream msg;
deba@127
   872
	    msg << "Map not found in file: " << _node_maps[i].first;
deba@127
   873
	    throw DataFormatError(msg.str().c_str());
deba@127
   874
	  }
deba@127
   875
	  map_index[i] = jt->second;
deba@127
   876
	}
deba@127
   877
deba@127
   878
	{
deba@127
   879
	  std::map<std::string, int>::iterator jt = maps.find("label");
deba@186
   880
	  if (jt != maps.end()) {
deba@186
   881
	    label_index = jt->second;
deba@186
   882
	  } else {
deba@186
   883
	    label_index = -1;
deba@186
   884
	  }
deba@127
   885
	}
deba@127
   886
	map_num = maps.size();
deba@127
   887
      }
deba@127
   888
deba@127
   889
      while (readLine() && line >> c && c != '@') {
deba@127
   890
	line.putback(c);
deba@127
   891
deba@127
   892
	std::vector<std::string> tokens(map_num);
deba@127
   893
	for (int i = 0; i < map_num; ++i) {
deba@127
   894
	  if (!_reader_bits::readToken(line, tokens[i])) {
deba@127
   895
	    std::ostringstream msg;
deba@127
   896
	    msg << "Column not found (" << i + 1 << ")";
deba@127
   897
	    throw DataFormatError(msg.str().c_str());
deba@127
   898
	  }
deba@127
   899
	}
deba@127
   900
	if (line >> std::ws >> c)
deba@127
   901
	  throw DataFormatError("Extra character on the end of line");
deba@127
   902
	
deba@127
   903
	Node n;
deba@127
   904
	if (!_use_nodes) {
deba@127
   905
	  n = _digraph.addNode();
deba@186
   906
	  if (label_index != -1)
deba@186
   907
	    _node_index.insert(std::make_pair(tokens[label_index], n));
deba@127
   908
	} else {
deba@186
   909
	  if (label_index == -1) 
deba@186
   910
	    throw DataFormatError("Label map not found in file");
deba@127
   911
	  typename std::map<std::string, Node>::iterator it =
deba@127
   912
	    _node_index.find(tokens[label_index]);
deba@127
   913
	  if (it == _node_index.end()) {
deba@127
   914
	    std::ostringstream msg;
deba@127
   915
	    msg << "Node with label not found: " << tokens[label_index];
deba@127
   916
	    throw DataFormatError(msg.str().c_str());	    
deba@127
   917
	  }
deba@127
   918
	  n = it->second;
deba@127
   919
	}
deba@127
   920
deba@127
   921
	for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
deba@127
   922
	  _node_maps[i].second->set(n, tokens[map_index[i]]);
deba@127
   923
	}
deba@127
   924
deba@127
   925
      }
deba@127
   926
      if (readSuccess()) {
deba@127
   927
	line.putback(c);
deba@127
   928
      }
deba@127
   929
    }
deba@127
   930
deba@127
   931
    void readArcs() {
deba@127
   932
deba@127
   933
      std::vector<int> map_index(_arc_maps.size());
deba@127
   934
      int map_num, label_index;
deba@127
   935
deba@186
   936
      char c;
deba@186
   937
      if (!readLine() || !(line >> c) || c == '@') {
deba@186
   938
	if (readSuccess() && line) line.putback(c);
deba@186
   939
	if (!_arc_maps.empty()) 
deba@186
   940
	  throw DataFormatError("Cannot find map names");
deba@186
   941
	return;
deba@186
   942
      }
deba@186
   943
      line.putback(c);
deba@127
   944
      
deba@127
   945
      {
deba@127
   946
	std::map<std::string, int> maps;
deba@127
   947
	
deba@127
   948
	std::string map;
deba@127
   949
	int index = 0;
alpar@156
   950
	while (_reader_bits::readToken(line, map)) {
deba@127
   951
	  if (maps.find(map) != maps.end()) {
deba@127
   952
	    std::ostringstream msg;
deba@127
   953
	    msg << "Multiple occurence of arc map: " << map;
deba@127
   954
	    throw DataFormatError(msg.str().c_str());
deba@127
   955
	  }
deba@127
   956
	  maps.insert(std::make_pair(map, index));
deba@127
   957
	  ++index;
deba@127
   958
	}
deba@127
   959
	
deba@127
   960
	for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) {
deba@127
   961
	  std::map<std::string, int>::iterator jt = 
deba@127
   962
	    maps.find(_arc_maps[i].first);
deba@127
   963
	  if (jt == maps.end()) {
deba@127
   964
	    std::ostringstream msg;
deba@127
   965
	    msg << "Map not found in file: " << _arc_maps[i].first;
deba@127
   966
	    throw DataFormatError(msg.str().c_str());
deba@127
   967
	  }
deba@127
   968
	  map_index[i] = jt->second;
deba@127
   969
	}
deba@127
   970
deba@127
   971
	{
deba@127
   972
	  std::map<std::string, int>::iterator jt = maps.find("label");
deba@186
   973
	  if (jt != maps.end()) {
deba@186
   974
	    label_index = jt->second;
deba@186
   975
	  } else {
deba@186
   976
	    label_index = -1;
deba@186
   977
	  }
deba@127
   978
	}
deba@127
   979
	map_num = maps.size();
deba@127
   980
      }
deba@127
   981
deba@127
   982
      while (readLine() && line >> c && c != '@') {
deba@127
   983
	line.putback(c);
deba@127
   984
deba@127
   985
	std::string source_token;
deba@127
   986
	std::string target_token;
deba@127
   987
deba@127
   988
	if (!_reader_bits::readToken(line, source_token))
deba@127
   989
	  throw DataFormatError("Source not found");
deba@127
   990
deba@127
   991
	if (!_reader_bits::readToken(line, target_token))
deba@186
   992
	  throw DataFormatError("Target not found");
deba@127
   993
	
deba@127
   994
	std::vector<std::string> tokens(map_num);
deba@127
   995
	for (int i = 0; i < map_num; ++i) {
deba@127
   996
	  if (!_reader_bits::readToken(line, tokens[i])) {
deba@127
   997
	    std::ostringstream msg;
deba@127
   998
	    msg << "Column not found (" << i + 1 << ")";
deba@127
   999
	    throw DataFormatError(msg.str().c_str());
deba@127
  1000
	  }
deba@127
  1001
	}
deba@127
  1002
	if (line >> std::ws >> c)
deba@127
  1003
	  throw DataFormatError("Extra character on the end of line");
deba@127
  1004
	
deba@127
  1005
	Arc a;
deba@127
  1006
	if (!_use_arcs) {
deba@127
  1007
deba@127
  1008
          typename NodeIndex::iterator it;
deba@127
  1009
 
deba@127
  1010
          it = _node_index.find(source_token);
deba@127
  1011
          if (it == _node_index.end()) {
deba@127
  1012
            std::ostringstream msg;
deba@127
  1013
            msg << "Item not found: " << source_token;
deba@127
  1014
            throw DataFormatError(msg.str().c_str());
deba@127
  1015
          }
deba@127
  1016
          Node source = it->second;
deba@127
  1017
deba@127
  1018
          it = _node_index.find(target_token);
deba@127
  1019
          if (it == _node_index.end()) {       
deba@127
  1020
            std::ostringstream msg;            
deba@127
  1021
            msg << "Item not found: " << target_token;
deba@127
  1022
            throw DataFormatError(msg.str().c_str());
deba@127
  1023
          }                                          
deba@127
  1024
          Node target = it->second;                            
deba@127
  1025
deba@127
  1026
	  a = _digraph.addArc(source, target);
deba@186
  1027
	  if (label_index != -1) 
deba@186
  1028
	    _arc_index.insert(std::make_pair(tokens[label_index], a));
deba@127
  1029
	} else {
deba@186
  1030
	  if (label_index == -1) 
deba@186
  1031
	    throw DataFormatError("Label map not found in file");
deba@127
  1032
	  typename std::map<std::string, Arc>::iterator it =
deba@127
  1033
	    _arc_index.find(tokens[label_index]);
deba@127
  1034
	  if (it == _arc_index.end()) {
deba@127
  1035
	    std::ostringstream msg;
deba@127
  1036
	    msg << "Arc with label not found: " << tokens[label_index];
deba@127
  1037
	    throw DataFormatError(msg.str().c_str());	    
deba@127
  1038
	  }
deba@127
  1039
	  a = it->second;
deba@127
  1040
	}
deba@127
  1041
deba@127
  1042
	for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) {
deba@127
  1043
	  _arc_maps[i].second->set(a, tokens[map_index[i]]);
deba@127
  1044
	}
deba@127
  1045
deba@127
  1046
      }
deba@127
  1047
      if (readSuccess()) {
deba@127
  1048
	line.putback(c);
deba@127
  1049
      }
deba@127
  1050
    }
deba@127
  1051
deba@127
  1052
    void readAttributes() {
deba@127
  1053
deba@127
  1054
      std::set<std::string> read_attr;
deba@127
  1055
deba@127
  1056
      char c;
deba@127
  1057
      while (readLine() && line >> c && c != '@') {
deba@127
  1058
	line.putback(c);
deba@127
  1059
	
deba@127
  1060
	std::string attr, token;
alpar@156
  1061
	if (!_reader_bits::readToken(line, attr))
deba@127
  1062
	  throw DataFormatError("Attribute name not found");
deba@127
  1063
	if (!_reader_bits::readToken(line, token))
deba@127
  1064
	  throw DataFormatError("Attribute value not found");
deba@127
  1065
	if (line >> c)
deba@127
  1066
	  throw DataFormatError("Extra character on the end of line");	  
deba@127
  1067
deba@127
  1068
	{
deba@127
  1069
	  std::set<std::string>::iterator it = read_attr.find(attr);
deba@127
  1070
	  if (it != read_attr.end()) {
deba@127
  1071
	    std::ostringstream msg;
deba@127
  1072
	    msg << "Multiple occurence of attribute " << attr;
deba@127
  1073
	    throw DataFormatError(msg.str().c_str());
deba@127
  1074
	  }
deba@127
  1075
	  read_attr.insert(attr);
deba@127
  1076
	}
deba@127
  1077
	
deba@127
  1078
	{
deba@127
  1079
	  typename Attributes::iterator it = _attributes.lower_bound(attr);
deba@127
  1080
	  while (it != _attributes.end() && it->first == attr) {
deba@127
  1081
	    it->second->set(token);
deba@127
  1082
	    ++it;
deba@127
  1083
	  }
deba@127
  1084
	}
deba@127
  1085
deba@127
  1086
      }
deba@127
  1087
      if (readSuccess()) {
deba@127
  1088
	line.putback(c);
deba@127
  1089
      }
deba@127
  1090
      for (typename Attributes::iterator it = _attributes.begin();
deba@127
  1091
	   it != _attributes.end(); ++it) {
deba@127
  1092
	if (read_attr.find(it->first) == read_attr.end()) {
deba@127
  1093
	  std::ostringstream msg;
deba@127
  1094
	  msg << "Attribute not found in file: " << it->first;
deba@127
  1095
	  throw DataFormatError(msg.str().c_str());
deba@127
  1096
	}	
deba@127
  1097
      }
deba@127
  1098
    }
deba@127
  1099
deba@127
  1100
  public:
alpar@156
  1101
alpar@156
  1102
    /// \name Execution of the reader    
alpar@156
  1103
    /// @{
alpar@156
  1104
alpar@156
  1105
    /// \brief Start the batch processing
alpar@156
  1106
    ///
alpar@156
  1107
    /// This function starts the batch processing
deba@127
  1108
    void run() {
deba@127
  1109
      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
deba@163
  1110
      if (!*_is) {
deba@163
  1111
	throw DataFormatError("Cannot find file");
deba@163
  1112
      }
deba@127
  1113
      
deba@188
  1114
      bool nodes_done = _skip_nodes;
deba@188
  1115
      bool arcs_done = _skip_arcs;
deba@127
  1116
      bool attributes_done = false;
deba@127
  1117
deba@127
  1118
      line_num = 0;      
deba@127
  1119
      readLine();
deba@172
  1120
      skipSection();
deba@127
  1121
deba@127
  1122
      while (readSuccess()) {
deba@127
  1123
	try {
deba@127
  1124
	  char c;
deba@127
  1125
	  std::string section, caption;
deba@127
  1126
	  line >> c;
alpar@156
  1127
	  _reader_bits::readToken(line, section);
alpar@156
  1128
	  _reader_bits::readToken(line, caption);
deba@127
  1129
deba@127
  1130
	  if (line >> c) 
deba@127
  1131
	    throw DataFormatError("Extra character on the end of line");
deba@127
  1132
deba@127
  1133
	  if (section == "nodes" && !nodes_done) {
deba@127
  1134
	    if (_nodes_caption.empty() || _nodes_caption == caption) {
deba@127
  1135
	      readNodes();
deba@127
  1136
	      nodes_done = true;
deba@127
  1137
	    }
deba@127
  1138
	  } else if ((section == "arcs" || section == "edges") && 
deba@127
  1139
		     !arcs_done) {
deba@127
  1140
	    if (_arcs_caption.empty() || _arcs_caption == caption) {
deba@127
  1141
	      readArcs();
deba@127
  1142
	      arcs_done = true;
deba@127
  1143
	    }
deba@127
  1144
	  } else if (section == "attributes" && !attributes_done) {
deba@127
  1145
	    if (_attributes_caption.empty() || _attributes_caption == caption) {
deba@127
  1146
	      readAttributes();
deba@127
  1147
	      attributes_done = true;
deba@127
  1148
	    }
deba@127
  1149
	  } else {
deba@172
  1150
	    readLine();
deba@172
  1151
	    skipSection();
deba@127
  1152
	  }
deba@127
  1153
	} catch (DataFormatError& error) {
deba@127
  1154
	  error.line(line_num);
deba@127
  1155
	  throw;
deba@127
  1156
	}	
deba@127
  1157
      }
deba@127
  1158
deba@127
  1159
      if (!nodes_done) {
deba@127
  1160
	throw DataFormatError("Section @nodes not found");
deba@127
  1161
      }
deba@127
  1162
deba@127
  1163
      if (!arcs_done) {
deba@127
  1164
	throw DataFormatError("Section @arcs not found");
deba@127
  1165
      }
deba@127
  1166
deba@127
  1167
      if (!attributes_done && !_attributes.empty()) {
deba@127
  1168
	throw DataFormatError("Section @attributes not found");
deba@127
  1169
      }
deba@127
  1170
deba@127
  1171
    }
alpar@156
  1172
alpar@156
  1173
    /// @}
deba@127
  1174
    
deba@127
  1175
  };
deba@127
  1176
kpeter@192
  1177
  /// \brief Return a \ref DigraphReader class
kpeter@192
  1178
  /// 
kpeter@192
  1179
  /// This function just returns a \ref DigraphReader class.
alpar@156
  1180
  /// \relates DigraphReader
deba@127
  1181
  template <typename Digraph>
deba@127
  1182
  DigraphReader<Digraph> digraphReader(std::istream& is, Digraph& digraph) {
deba@163
  1183
    DigraphReader<Digraph> tmp(is, digraph);
deba@163
  1184
    return tmp;
deba@127
  1185
  }
deba@127
  1186
kpeter@192
  1187
  /// \brief Return a \ref DigraphReader class
kpeter@192
  1188
  /// 
kpeter@192
  1189
  /// This function just returns a \ref DigraphReader class.
alpar@156
  1190
  /// \relates DigraphReader
deba@127
  1191
  template <typename Digraph>
deba@127
  1192
  DigraphReader<Digraph> digraphReader(const std::string& fn, 
deba@127
  1193
				       Digraph& digraph) {
deba@163
  1194
    DigraphReader<Digraph> tmp(fn, digraph);
deba@163
  1195
    return tmp;
deba@127
  1196
  }
deba@127
  1197
kpeter@192
  1198
  /// \brief Return a \ref DigraphReader class
kpeter@192
  1199
  /// 
kpeter@192
  1200
  /// This function just returns a \ref DigraphReader class.
alpar@156
  1201
  /// \relates DigraphReader
deba@127
  1202
  template <typename Digraph>
deba@127
  1203
  DigraphReader<Digraph> digraphReader(const char* fn, Digraph& digraph) {
deba@163
  1204
    DigraphReader<Digraph> tmp(fn, digraph);
deba@163
  1205
    return tmp;
deba@127
  1206
  }
deba@165
  1207
deba@190
  1208
  template <typename Graph>
deba@190
  1209
  class GraphReader;
deba@190
  1210
deba@190
  1211
  template <typename Graph>
deba@190
  1212
  GraphReader<Graph> graphReader(std::istream& is, Graph& graph);    
deba@190
  1213
deba@190
  1214
  template <typename Graph>
deba@190
  1215
  GraphReader<Graph> graphReader(const std::string& fn, Graph& graph);   
deba@190
  1216
deba@190
  1217
  template <typename Graph>
deba@190
  1218
  GraphReader<Graph> graphReader(const char *fn, Graph& graph);    
deba@190
  1219
deba@165
  1220
  /// \ingroup lemon_io
deba@165
  1221
  ///  
kpeter@192
  1222
  /// \brief \ref lgf-format "LGF" reader for undirected graphs
deba@165
  1223
  ///
deba@165
  1224
  /// This utility reads an \ref lgf-format "LGF" file.
kpeter@192
  1225
  ///
kpeter@192
  1226
  /// It can be used almost the same way as \c DigraphReader.
kpeter@192
  1227
  /// The only difference is that this class can handle edges and
kpeter@192
  1228
  /// edge maps as well as arcs and arc maps.
deba@201
  1229
  ///
deba@201
  1230
  /// The columns in the \c \@edges (or \c \@arcs) section are the
deba@201
  1231
  /// edge maps. However, if there are two maps with the same name
deba@201
  1232
  /// prefixed with \c '+' and \c '-', then these can be read into an
deba@201
  1233
  /// arc map.  Similarly, an attribute can be read into an arc, if
deba@201
  1234
  /// it's value is an edge label prefixed with \c '+' or \c '-'.
deba@165
  1235
  template <typename _Graph>
deba@165
  1236
  class GraphReader {
deba@165
  1237
  public:
deba@165
  1238
deba@165
  1239
    typedef _Graph Graph;
deba@165
  1240
    TEMPLATE_GRAPH_TYPEDEFS(Graph);
deba@165
  1241
    
deba@165
  1242
  private:
deba@165
  1243
deba@165
  1244
    std::istream* _is;
deba@165
  1245
    bool local_is;
deba@165
  1246
deba@165
  1247
    Graph& _graph;
deba@165
  1248
deba@165
  1249
    std::string _nodes_caption;
deba@165
  1250
    std::string _edges_caption;
deba@165
  1251
    std::string _attributes_caption;
deba@165
  1252
deba@165
  1253
    typedef std::map<std::string, Node> NodeIndex;
deba@165
  1254
    NodeIndex _node_index;
deba@165
  1255
    typedef std::map<std::string, Edge> EdgeIndex;
deba@165
  1256
    EdgeIndex _edge_index;
deba@165
  1257
    
deba@165
  1258
    typedef std::vector<std::pair<std::string, 
deba@165
  1259
      _reader_bits::MapStorageBase<Node>*> > NodeMaps;    
deba@165
  1260
    NodeMaps _node_maps; 
deba@165
  1261
deba@165
  1262
    typedef std::vector<std::pair<std::string,
deba@165
  1263
      _reader_bits::MapStorageBase<Edge>*> > EdgeMaps;
deba@165
  1264
    EdgeMaps _edge_maps;
deba@165
  1265
deba@165
  1266
    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*> 
deba@165
  1267
      Attributes;
deba@165
  1268
    Attributes _attributes;
deba@165
  1269
deba@165
  1270
    bool _use_nodes;
deba@165
  1271
    bool _use_edges;
deba@165
  1272
deba@188
  1273
    bool _skip_nodes;
deba@188
  1274
    bool _skip_edges;
deba@188
  1275
deba@165
  1276
    int line_num;
deba@165
  1277
    std::istringstream line;
deba@165
  1278
deba@165
  1279
  public:
deba@165
  1280
deba@165
  1281
    /// \brief Constructor
deba@165
  1282
    ///
kpeter@192
  1283
    /// Construct an undirected graph reader, which reads from the given
deba@165
  1284
    /// input stream.
deba@165
  1285
    GraphReader(std::istream& is, Graph& graph) 
deba@165
  1286
      : _is(&is), local_is(false), _graph(graph),
deba@188
  1287
	_use_nodes(false), _use_edges(false),
deba@188
  1288
	_skip_nodes(false), _skip_edges(false) {}
deba@165
  1289
deba@165
  1290
    /// \brief Constructor
deba@165
  1291
    ///
kpeter@192
  1292
    /// Construct an undirected graph reader, which reads from the given
deba@165
  1293
    /// file.
deba@165
  1294
    GraphReader(const std::string& fn, Graph& graph) 
deba@165
  1295
      : _is(new std::ifstream(fn.c_str())), local_is(true), _graph(graph),
deba@188
  1296
    	_use_nodes(false), _use_edges(false),
deba@188
  1297
	_skip_nodes(false), _skip_edges(false) {}
deba@165
  1298
    
deba@165
  1299
    /// \brief Constructor
deba@165
  1300
    ///
kpeter@192
  1301
    /// Construct an undirected graph reader, which reads from the given
deba@165
  1302
    /// file.
deba@165
  1303
    GraphReader(const char* fn, Graph& graph) 
deba@165
  1304
      : _is(new std::ifstream(fn)), local_is(true), _graph(graph),
deba@188
  1305
    	_use_nodes(false), _use_edges(false),
deba@188
  1306
	_skip_nodes(false), _skip_edges(false) {}
deba@165
  1307
deba@165
  1308
    /// \brief Destructor
deba@165
  1309
    ~GraphReader() {
deba@165
  1310
      for (typename NodeMaps::iterator it = _node_maps.begin(); 
deba@165
  1311
	   it != _node_maps.end(); ++it) {
deba@165
  1312
	delete it->second;
deba@165
  1313
      }
deba@165
  1314
deba@165
  1315
      for (typename EdgeMaps::iterator it = _edge_maps.begin(); 
deba@165
  1316
	   it != _edge_maps.end(); ++it) {
deba@165
  1317
	delete it->second;
deba@165
  1318
      }
deba@165
  1319
deba@165
  1320
      for (typename Attributes::iterator it = _attributes.begin(); 
deba@165
  1321
	   it != _attributes.end(); ++it) {
deba@165
  1322
	delete it->second;
deba@165
  1323
      }
deba@165
  1324
deba@165
  1325
      if (local_is) {
deba@165
  1326
	delete _is;
deba@165
  1327
      }
deba@165
  1328
deba@165
  1329
    }
deba@165
  1330
deba@165
  1331
  private:
deba@190
  1332
    friend GraphReader<Graph> graphReader<>(std::istream& is, Graph& graph);    
deba@190
  1333
    friend GraphReader<Graph> graphReader<>(const std::string& fn, 
deba@190
  1334
					    Graph& graph);   
deba@190
  1335
    friend GraphReader<Graph> graphReader<>(const char *fn, Graph& graph);    
deba@190
  1336
deba@190
  1337
    GraphReader(GraphReader& other) 
deba@190
  1338
      : _is(other._is), local_is(other.local_is), _graph(other._graph),
deba@190
  1339
	_use_nodes(other._use_nodes), _use_edges(other._use_edges),
deba@190
  1340
	_skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) {
deba@190
  1341
deba@190
  1342
      other._is = 0;
deba@190
  1343
      other.local_is = false;
deba@190
  1344
      
deba@190
  1345
      _node_index.swap(other._node_index);
deba@190
  1346
      _edge_index.swap(other._edge_index);
deba@190
  1347
deba@190
  1348
      _node_maps.swap(other._node_maps);
deba@190
  1349
      _edge_maps.swap(other._edge_maps);
deba@190
  1350
      _attributes.swap(other._attributes);
deba@190
  1351
deba@190
  1352
      _nodes_caption = other._nodes_caption;
deba@190
  1353
      _edges_caption = other._edges_caption;
deba@190
  1354
      _attributes_caption = other._attributes_caption;
deba@190
  1355
deba@190
  1356
    }
deba@190
  1357
deba@165
  1358
    GraphReader& operator=(const GraphReader&);
deba@165
  1359
deba@165
  1360
  public:
deba@165
  1361
deba@165
  1362
    /// \name Reading rules
deba@165
  1363
    /// @{
deba@165
  1364
    
deba@165
  1365
    /// \brief Node map reading rule
deba@165
  1366
    ///
deba@165
  1367
    /// Add a node map reading rule to the reader.
deba@165
  1368
    template <typename Map>
deba@165
  1369
    GraphReader& nodeMap(const std::string& caption, Map& map) {
deba@165
  1370
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
deba@165
  1371
      _reader_bits::MapStorageBase<Node>* storage = 
deba@165
  1372
	new _reader_bits::MapStorage<Node, Map>(map);
deba@165
  1373
      _node_maps.push_back(std::make_pair(caption, storage));
deba@165
  1374
      return *this;
deba@165
  1375
    }
deba@165
  1376
deba@165
  1377
    /// \brief Node map reading rule
deba@165
  1378
    ///
deba@165
  1379
    /// Add a node map reading rule with specialized converter to the
deba@165
  1380
    /// reader.
deba@165
  1381
    template <typename Map, typename Converter>
deba@165
  1382
    GraphReader& nodeMap(const std::string& caption, Map& map, 
deba@165
  1383
			   const Converter& converter = Converter()) {
deba@165
  1384
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
deba@165
  1385
      _reader_bits::MapStorageBase<Node>* storage = 
deba@165
  1386
	new _reader_bits::MapStorage<Node, Map, Converter>(map, converter);
deba@165
  1387
      _node_maps.push_back(std::make_pair(caption, storage));
deba@165
  1388
      return *this;
deba@165
  1389
    }
deba@165
  1390
deba@165
  1391
    /// \brief Edge map reading rule
deba@165
  1392
    ///
deba@165
  1393
    /// Add an edge map reading rule to the reader.
deba@165
  1394
    template <typename Map>
deba@165
  1395
    GraphReader& edgeMap(const std::string& caption, Map& map) {
deba@165
  1396
      checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>();
deba@165
  1397
      _reader_bits::MapStorageBase<Edge>* storage = 
deba@165
  1398
	new _reader_bits::MapStorage<Edge, Map>(map);
deba@165
  1399
      _edge_maps.push_back(std::make_pair(caption, storage));
deba@165
  1400
      return *this;
deba@165
  1401
    }
deba@165
  1402
deba@165
  1403
    /// \brief Edge map reading rule
deba@165
  1404
    ///
deba@165
  1405
    /// Add an edge map reading rule with specialized converter to the
deba@165
  1406
    /// reader.
deba@165
  1407
    template <typename Map, typename Converter>
deba@165
  1408
    GraphReader& edgeMap(const std::string& caption, Map& map, 
deba@165
  1409
			  const Converter& converter = Converter()) {
deba@165
  1410
      checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>();
deba@165
  1411
      _reader_bits::MapStorageBase<Edge>* storage = 
deba@165
  1412
	new _reader_bits::MapStorage<Edge, Map, Converter>(map, converter);
deba@165
  1413
      _edge_maps.push_back(std::make_pair(caption, storage));
deba@165
  1414
      return *this;
deba@165
  1415
    }
deba@165
  1416
deba@165
  1417
    /// \brief Arc map reading rule
deba@165
  1418
    ///
deba@165
  1419
    /// Add an arc map reading rule to the reader.
deba@165
  1420
    template <typename Map>
deba@165
  1421
    GraphReader& arcMap(const std::string& caption, Map& map) {
deba@165
  1422
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
deba@165
  1423
      _reader_bits::MapStorageBase<Edge>* forward_storage = 
deba@165
  1424
	new _reader_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map);
deba@165
  1425
      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
deba@165
  1426
      _reader_bits::MapStorageBase<Edge>* backward_storage = 
deba@165
  1427
	new _reader_bits::GraphArcMapStorage<Graph, false, Map>(_graph, map);
deba@165
  1428
      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
deba@165
  1429
      return *this;
deba@165
  1430
    }
deba@165
  1431
deba@165
  1432
    /// \brief Arc map reading rule
deba@165
  1433
    ///
deba@165
  1434
    /// Add an arc map reading rule with specialized converter to the
deba@165
  1435
    /// reader.
deba@165
  1436
    template <typename Map, typename Converter>
deba@165
  1437
    GraphReader& arcMap(const std::string& caption, Map& map, 
deba@165
  1438
			  const Converter& converter = Converter()) {
deba@165
  1439
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
deba@165
  1440
      _reader_bits::MapStorageBase<Edge>* forward_storage = 
deba@165
  1441
	new _reader_bits::GraphArcMapStorage<Graph, true, Map, Converter>
deba@165
  1442
	(_graph, map, converter);
deba@165
  1443
      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
deba@165
  1444
      _reader_bits::MapStorageBase<Edge>* backward_storage = 
deba@165
  1445
	new _reader_bits::GraphArcMapStorage<Graph, false, Map, Converter>
deba@165
  1446
	(_graph, map, converter);
deba@165
  1447
      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
deba@165
  1448
      return *this;
deba@165
  1449
    }
deba@165
  1450
deba@165
  1451
    /// \brief Attribute reading rule
deba@165
  1452
    ///
deba@165
  1453
    /// Add an attribute reading rule to the reader.
deba@165
  1454
    template <typename Value>
deba@165
  1455
    GraphReader& attribute(const std::string& caption, Value& value) {
deba@165
  1456
      _reader_bits::ValueStorageBase* storage = 
deba@165
  1457
	new _reader_bits::ValueStorage<Value>(value);
deba@165
  1458
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1459
      return *this;
deba@165
  1460
    }
deba@165
  1461
deba@165
  1462
    /// \brief Attribute reading rule
deba@165
  1463
    ///
deba@165
  1464
    /// Add an attribute reading rule with specialized converter to the
deba@165
  1465
    /// reader.
deba@165
  1466
    template <typename Value, typename Converter>
deba@165
  1467
    GraphReader& attribute(const std::string& caption, Value& value, 
deba@165
  1468
			     const Converter& converter = Converter()) {
deba@165
  1469
      _reader_bits::ValueStorageBase* storage = 
deba@165
  1470
	new _reader_bits::ValueStorage<Value, Converter>(value, converter);
deba@165
  1471
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1472
      return *this;
deba@165
  1473
    }
deba@165
  1474
deba@165
  1475
    /// \brief Node reading rule
deba@165
  1476
    ///
deba@165
  1477
    /// Add a node reading rule to reader.
deba@165
  1478
    GraphReader& node(const std::string& caption, Node& node) {
deba@165
  1479
      typedef _reader_bits::MapLookUpConverter<Node> Converter;
deba@165
  1480
      Converter converter(_node_index);
deba@165
  1481
      _reader_bits::ValueStorageBase* storage = 
deba@165
  1482
	new _reader_bits::ValueStorage<Node, Converter>(node, converter);
deba@165
  1483
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1484
      return *this;
deba@165
  1485
    }
deba@165
  1486
deba@165
  1487
    /// \brief Edge reading rule
deba@165
  1488
    ///
deba@165
  1489
    /// Add an edge reading rule to reader.
deba@165
  1490
    GraphReader& edge(const std::string& caption, Edge& edge) {
deba@165
  1491
      typedef _reader_bits::MapLookUpConverter<Edge> Converter;
deba@165
  1492
      Converter converter(_edge_index);
deba@165
  1493
      _reader_bits::ValueStorageBase* storage = 
deba@165
  1494
	new _reader_bits::ValueStorage<Edge, Converter>(edge, converter);
deba@165
  1495
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1496
      return *this;
deba@165
  1497
    }
deba@165
  1498
deba@165
  1499
    /// \brief Arc reading rule
deba@165
  1500
    ///
deba@165
  1501
    /// Add an arc reading rule to reader.
deba@165
  1502
    GraphReader& arc(const std::string& caption, Arc& arc) {
deba@165
  1503
      typedef _reader_bits::GraphArcLookUpConverter<Graph> Converter;
deba@165
  1504
      Converter converter(_graph, _edge_index);
deba@165
  1505
      _reader_bits::ValueStorageBase* storage = 
deba@165
  1506
	new _reader_bits::ValueStorage<Arc, Converter>(arc, converter);
deba@165
  1507
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1508
      return *this;
deba@165
  1509
    }
deba@165
  1510
deba@165
  1511
    /// @}
deba@165
  1512
deba@165
  1513
    /// \name Select section by name
deba@165
  1514
    /// @{
deba@165
  1515
deba@165
  1516
    /// \brief Set \c \@nodes section to be read
deba@165
  1517
    ///
kpeter@192
  1518
    /// Set \c \@nodes section to be read.
deba@165
  1519
    GraphReader& nodes(const std::string& caption) {
deba@165
  1520
      _nodes_caption = caption;
deba@165
  1521
      return *this;
deba@165
  1522
    }
deba@165
  1523
deba@165
  1524
    /// \brief Set \c \@edges section to be read
deba@165
  1525
    ///
kpeter@192
  1526
    /// Set \c \@edges section to be read.
deba@165
  1527
    GraphReader& edges(const std::string& caption) {
deba@165
  1528
      _edges_caption = caption;
deba@165
  1529
      return *this;
deba@165
  1530
    }
deba@165
  1531
deba@165
  1532
    /// \brief Set \c \@attributes section to be read
deba@165
  1533
    ///
kpeter@192
  1534
    /// Set \c \@attributes section to be read.
deba@165
  1535
    GraphReader& attributes(const std::string& caption) {
deba@165
  1536
      _attributes_caption = caption;
deba@165
  1537
      return *this;
deba@165
  1538
    }
deba@165
  1539
deba@165
  1540
    /// @}
deba@165
  1541
deba@165
  1542
    /// \name Using previously constructed node or edge set
deba@165
  1543
    /// @{
deba@165
  1544
deba@165
  1545
    /// \brief Use previously constructed node set
deba@165
  1546
    ///
deba@165
  1547
    /// Use previously constructed node set, and specify the node
deba@165
  1548
    /// label map.
deba@165
  1549
    template <typename Map>
deba@165
  1550
    GraphReader& useNodes(const Map& map) {
deba@165
  1551
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
deba@165
  1552
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); 
deba@165
  1553
      _use_nodes = true;
deba@165
  1554
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@165
  1555
      for (NodeIt n(_graph); n != INVALID; ++n) {
deba@165
  1556
	_node_index.insert(std::make_pair(converter(map[n]), n));
deba@165
  1557
      }
deba@165
  1558
      return *this;
deba@165
  1559
    }
deba@165
  1560
deba@165
  1561
    /// \brief Use previously constructed node set
deba@165
  1562
    ///
deba@165
  1563
    /// Use previously constructed node set, and specify the node
deba@165
  1564
    /// label map and a functor which converts the label map values to
kpeter@192
  1565
    /// \c std::string.
deba@165
  1566
    template <typename Map, typename Converter>
deba@165
  1567
    GraphReader& useNodes(const Map& map, 
deba@165
  1568
			    const Converter& converter = Converter()) {
deba@165
  1569
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
deba@165
  1570
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); 
deba@165
  1571
      _use_nodes = true;
deba@165
  1572
      for (NodeIt n(_graph); n != INVALID; ++n) {
deba@165
  1573
	_node_index.insert(std::make_pair(converter(map[n]), n));
deba@165
  1574
      }
deba@165
  1575
      return *this;
deba@165
  1576
    }
deba@165
  1577
deba@165
  1578
    /// \brief Use previously constructed edge set
deba@165
  1579
    ///
deba@165
  1580
    /// Use previously constructed edge set, and specify the edge
deba@165
  1581
    /// label map.
deba@165
  1582
    template <typename Map>
deba@165
  1583
    GraphReader& useEdges(const Map& map) {
deba@165
  1584
      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
deba@165
  1585
      LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member");
deba@165
  1586
      _use_edges = true;
deba@165
  1587
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@165
  1588
      for (EdgeIt a(_graph); a != INVALID; ++a) {
deba@165
  1589
	_edge_index.insert(std::make_pair(converter(map[a]), a));
deba@165
  1590
      }
deba@165
  1591
      return *this;
deba@165
  1592
    }
deba@165
  1593
deba@165
  1594
    /// \brief Use previously constructed edge set
deba@165
  1595
    ///
deba@165
  1596
    /// Use previously constructed edge set, and specify the edge
deba@165
  1597
    /// label map and a functor which converts the label map values to
kpeter@192
  1598
    /// \c std::string.
deba@165
  1599
    template <typename Map, typename Converter>
deba@165
  1600
    GraphReader& useEdges(const Map& map, 
deba@165
  1601
			    const Converter& converter = Converter()) {
deba@165
  1602
      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
deba@165
  1603
      LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member"); 
deba@165
  1604
      _use_edges = true;
deba@165
  1605
      for (EdgeIt a(_graph); a != INVALID; ++a) {
deba@165
  1606
	_edge_index.insert(std::make_pair(converter(map[a]), a));
deba@165
  1607
      }
deba@165
  1608
      return *this;
deba@165
  1609
    }
deba@165
  1610
kpeter@192
  1611
    /// \brief Skip the reading of node section
deba@188
  1612
    ///
deba@188
  1613
    /// Omit the reading of the node section. This implies that each node
kpeter@192
  1614
    /// map reading rule will be abandoned, and the nodes of the graph
deba@188
  1615
    /// will not be constructed, which usually cause that the edge set
deba@188
  1616
    /// could not be read due to lack of node name
kpeter@192
  1617
    /// could not be read due to lack of node name resolving.
kpeter@192
  1618
    /// Therefore \c skipEdges() function should also be used, or
kpeter@192
  1619
    /// \c useNodes() should be used to specify the label of the nodes.
deba@188
  1620
    GraphReader& skipNodes() {
deba@188
  1621
      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set"); 
deba@188
  1622
      _skip_nodes = true;
deba@188
  1623
      return *this;
deba@188
  1624
    }
deba@188
  1625
kpeter@192
  1626
    /// \brief Skip the reading of edge section
deba@188
  1627
    ///
deba@188
  1628
    /// Omit the reading of the edge section. This implies that each edge
kpeter@192
  1629
    /// map reading rule will be abandoned, and the edges of the graph
deba@188
  1630
    /// will not be constructed.
deba@188
  1631
    GraphReader& skipEdges() {
deba@188
  1632
      LEMON_ASSERT(!_skip_edges, "Skip edges already set"); 
deba@188
  1633
      _skip_edges = true;
deba@188
  1634
      return *this;
deba@188
  1635
    }
deba@188
  1636
deba@165
  1637
    /// @}
deba@165
  1638
deba@165
  1639
  private:
deba@165
  1640
deba@165
  1641
    bool readLine() {
deba@165
  1642
      std::string str;
deba@165
  1643
      while(++line_num, std::getline(*_is, str)) {
deba@165
  1644
	line.clear(); line.str(str);
deba@165
  1645
	char c;
deba@165
  1646
	if (line >> std::ws >> c && c != '#') {
deba@165
  1647
	  line.putback(c);
deba@165
  1648
	  return true;
deba@165
  1649
	}
deba@165
  1650
      }
deba@165
  1651
      return false;
deba@165
  1652
    }
deba@165
  1653
deba@165
  1654
    bool readSuccess() {
deba@165
  1655
      return static_cast<bool>(*_is);
deba@165
  1656
    }
deba@165
  1657
    
deba@165
  1658
    void skipSection() {
deba@165
  1659
      char c;
deba@165
  1660
      while (readSuccess() && line >> c && c != '@') {
deba@165
  1661
	readLine();
deba@165
  1662
      }
deba@165
  1663
      line.putback(c);
deba@165
  1664
    }
deba@165
  1665
deba@165
  1666
    void readNodes() {
deba@165
  1667
deba@165
  1668
      std::vector<int> map_index(_node_maps.size());
deba@165
  1669
      int map_num, label_index;
deba@165
  1670
deba@186
  1671
      char c;
deba@186
  1672
      if (!readLine() || !(line >> c) || c == '@') {
deba@186
  1673
	if (readSuccess() && line) line.putback(c);
deba@186
  1674
	if (!_node_maps.empty()) 
deba@186
  1675
	  throw DataFormatError("Cannot find map names");
deba@186
  1676
	return;
deba@186
  1677
      }
deba@186
  1678
      line.putback(c);
deba@165
  1679
      
deba@165
  1680
      {
deba@165
  1681
	std::map<std::string, int> maps;
deba@165
  1682
	
deba@165
  1683
	std::string map;
deba@165
  1684
	int index = 0;
deba@165
  1685
	while (_reader_bits::readToken(line, map)) {
deba@165
  1686
	  if (maps.find(map) != maps.end()) {
deba@165
  1687
	    std::ostringstream msg;
deba@165
  1688
	    msg << "Multiple occurence of node map: " << map;
deba@165
  1689
	    throw DataFormatError(msg.str().c_str());
deba@165
  1690
	  }
deba@165
  1691
	  maps.insert(std::make_pair(map, index));
deba@165
  1692
	  ++index;
deba@165
  1693
	}
deba@165
  1694
	
deba@165
  1695
	for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
deba@165
  1696
	  std::map<std::string, int>::iterator jt = 
deba@165
  1697
	    maps.find(_node_maps[i].first);
deba@165
  1698
	  if (jt == maps.end()) {
deba@165
  1699
	    std::ostringstream msg;
deba@165
  1700
	    msg << "Map not found in file: " << _node_maps[i].first;
deba@165
  1701
	    throw DataFormatError(msg.str().c_str());
deba@165
  1702
	  }
deba@165
  1703
	  map_index[i] = jt->second;
deba@165
  1704
	}
deba@165
  1705
deba@165
  1706
	{
deba@165
  1707
	  std::map<std::string, int>::iterator jt = maps.find("label");
deba@186
  1708
	  if (jt != maps.end()) {
deba@186
  1709
	    label_index = jt->second;
deba@186
  1710
	  } else {
deba@186
  1711
	    label_index = -1;
deba@186
  1712
	  }
deba@165
  1713
	}
deba@165
  1714
	map_num = maps.size();
deba@165
  1715
      }
deba@165
  1716
deba@165
  1717
      while (readLine() && line >> c && c != '@') {
deba@165
  1718
	line.putback(c);
deba@165
  1719
deba@165
  1720
	std::vector<std::string> tokens(map_num);
deba@165
  1721
	for (int i = 0; i < map_num; ++i) {
deba@165
  1722
	  if (!_reader_bits::readToken(line, tokens[i])) {
deba@165
  1723
	    std::ostringstream msg;
deba@165
  1724
	    msg << "Column not found (" << i + 1 << ")";
deba@165
  1725
	    throw DataFormatError(msg.str().c_str());
deba@165
  1726
	  }
deba@165
  1727
	}
deba@165
  1728
	if (line >> std::ws >> c)
deba@165
  1729
	  throw DataFormatError("Extra character on the end of line");
deba@165
  1730
	
deba@165
  1731
	Node n;
deba@165
  1732
	if (!_use_nodes) {
deba@165
  1733
	  n = _graph.addNode();
deba@186
  1734
	  if (label_index != -1) 
deba@186
  1735
	    _node_index.insert(std::make_pair(tokens[label_index], n));
deba@165
  1736
	} else {
deba@186
  1737
	  if (label_index == -1) 
deba@186
  1738
	    throw DataFormatError("Label map not found in file");
deba@165
  1739
	  typename std::map<std::string, Node>::iterator it =
deba@165
  1740
	    _node_index.find(tokens[label_index]);
deba@165
  1741
	  if (it == _node_index.end()) {
deba@165
  1742
	    std::ostringstream msg;
deba@165
  1743
	    msg << "Node with label not found: " << tokens[label_index];
deba@165
  1744
	    throw DataFormatError(msg.str().c_str());	    
deba@165
  1745
	  }
deba@165
  1746
	  n = it->second;
deba@165
  1747
	}
deba@165
  1748
deba@165
  1749
	for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
deba@165
  1750
	  _node_maps[i].second->set(n, tokens[map_index[i]]);
deba@165
  1751
	}
deba@165
  1752
deba@165
  1753
      }
deba@165
  1754
      if (readSuccess()) {
deba@165
  1755
	line.putback(c);
deba@165
  1756
      }
deba@165
  1757
    }
deba@165
  1758
deba@165
  1759
    void readEdges() {
deba@165
  1760
deba@165
  1761
      std::vector<int> map_index(_edge_maps.size());
deba@165
  1762
      int map_num, label_index;
deba@165
  1763
deba@186
  1764
      char c;
deba@186
  1765
      if (!readLine() || !(line >> c) || c == '@') {
deba@186
  1766
	if (readSuccess() && line) line.putback(c);
deba@186
  1767
	if (!_edge_maps.empty()) 
deba@186
  1768
	  throw DataFormatError("Cannot find map names");
deba@186
  1769
	return;
deba@186
  1770
      }
deba@186
  1771
      line.putback(c);
deba@165
  1772
      
deba@165
  1773
      {
deba@165
  1774
	std::map<std::string, int> maps;
deba@165
  1775
	
deba@165
  1776
	std::string map;
deba@165
  1777
	int index = 0;
deba@165
  1778
	while (_reader_bits::readToken(line, map)) {
deba@165
  1779
	  if (maps.find(map) != maps.end()) {
deba@165
  1780
	    std::ostringstream msg;
deba@165
  1781
	    msg << "Multiple occurence of edge map: " << map;
deba@165
  1782
	    throw DataFormatError(msg.str().c_str());
deba@165
  1783
	  }
deba@165
  1784
	  maps.insert(std::make_pair(map, index));
deba@165
  1785
	  ++index;
deba@165
  1786
	}
deba@165
  1787
	
deba@165
  1788
	for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) {
deba@165
  1789
	  std::map<std::string, int>::iterator jt = 
deba@165
  1790
	    maps.find(_edge_maps[i].first);
deba@165
  1791
	  if (jt == maps.end()) {
deba@165
  1792
	    std::ostringstream msg;
deba@165
  1793
	    msg << "Map not found in file: " << _edge_maps[i].first;
deba@165
  1794
	    throw DataFormatError(msg.str().c_str());
deba@165
  1795
	  }
deba@165
  1796
	  map_index[i] = jt->second;
deba@165
  1797
	}
deba@165
  1798
deba@165
  1799
	{
deba@165
  1800
	  std::map<std::string, int>::iterator jt = maps.find("label");
deba@186
  1801
	  if (jt != maps.end()) {
deba@186
  1802
	    label_index = jt->second;
deba@186
  1803
	  } else {
deba@186
  1804
	    label_index = -1;
deba@186
  1805
	  }
deba@165
  1806
	}
deba@165
  1807
	map_num = maps.size();
deba@165
  1808
      }
deba@165
  1809
deba@165
  1810
      while (readLine() && line >> c && c != '@') {
deba@165
  1811
	line.putback(c);
deba@165
  1812
deba@165
  1813
	std::string source_token;
deba@165
  1814
	std::string target_token;
deba@165
  1815
deba@165
  1816
	if (!_reader_bits::readToken(line, source_token))
deba@186
  1817
	  throw DataFormatError("Node u not found");
deba@165
  1818
deba@165
  1819
	if (!_reader_bits::readToken(line, target_token))
deba@186
  1820
	  throw DataFormatError("Node v not found");
deba@165
  1821
	
deba@165
  1822
	std::vector<std::string> tokens(map_num);
deba@165
  1823
	for (int i = 0; i < map_num; ++i) {
deba@165
  1824
	  if (!_reader_bits::readToken(line, tokens[i])) {
deba@165
  1825
	    std::ostringstream msg;
deba@165
  1826
	    msg << "Column not found (" << i + 1 << ")";
deba@165
  1827
	    throw DataFormatError(msg.str().c_str());
deba@165
  1828
	  }
deba@165
  1829
	}
deba@165
  1830
	if (line >> std::ws >> c)
deba@165
  1831
	  throw DataFormatError("Extra character on the end of line");
deba@165
  1832
	
deba@165
  1833
	Edge e;
deba@165
  1834
	if (!_use_edges) {
deba@165
  1835
deba@165
  1836
          typename NodeIndex::iterator it;
deba@165
  1837
 
deba@165
  1838
          it = _node_index.find(source_token);
deba@165
  1839
          if (it == _node_index.end()) {
deba@165
  1840
            std::ostringstream msg;
deba@165
  1841
            msg << "Item not found: " << source_token;
deba@165
  1842
            throw DataFormatError(msg.str().c_str());
deba@165
  1843
          }
deba@165
  1844
          Node source = it->second;
deba@165
  1845
deba@165
  1846
          it = _node_index.find(target_token);
deba@165
  1847
          if (it == _node_index.end()) {       
deba@165
  1848
            std::ostringstream msg;            
deba@165
  1849
            msg << "Item not found: " << target_token;
deba@165
  1850
            throw DataFormatError(msg.str().c_str());
deba@165
  1851
          }                                          
deba@165
  1852
          Node target = it->second;                            
deba@165
  1853
deba@165
  1854
	  e = _graph.addEdge(source, target);
deba@186
  1855
	  if (label_index != -1) 
deba@186
  1856
	    _edge_index.insert(std::make_pair(tokens[label_index], e));
deba@165
  1857
	} else {
deba@186
  1858
	  if (label_index == -1) 
deba@186
  1859
	    throw DataFormatError("Label map not found in file");
deba@165
  1860
	  typename std::map<std::string, Edge>::iterator it =
deba@165
  1861
	    _edge_index.find(tokens[label_index]);
deba@165
  1862
	  if (it == _edge_index.end()) {
deba@165
  1863
	    std::ostringstream msg;
deba@165
  1864
	    msg << "Edge with label not found: " << tokens[label_index];
deba@165
  1865
	    throw DataFormatError(msg.str().c_str());	    
deba@165
  1866
	  }
deba@165
  1867
	  e = it->second;
deba@165
  1868
	}
deba@165
  1869
deba@165
  1870
	for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) {
deba@165
  1871
	  _edge_maps[i].second->set(e, tokens[map_index[i]]);
deba@165
  1872
	}
deba@165
  1873
deba@165
  1874
      }
deba@165
  1875
      if (readSuccess()) {
deba@165
  1876
	line.putback(c);
deba@165
  1877
      }
deba@165
  1878
    }
deba@165
  1879
deba@165
  1880
    void readAttributes() {
deba@165
  1881
deba@165
  1882
      std::set<std::string> read_attr;
deba@165
  1883
deba@165
  1884
      char c;
deba@165
  1885
      while (readLine() && line >> c && c != '@') {
deba@165
  1886
	line.putback(c);
deba@165
  1887
	
deba@165
  1888
	std::string attr, token;
deba@165
  1889
	if (!_reader_bits::readToken(line, attr))
deba@165
  1890
	  throw DataFormatError("Attribute name not found");
deba@165
  1891
	if (!_reader_bits::readToken(line, token))
deba@165
  1892
	  throw DataFormatError("Attribute value not found");
deba@165
  1893
	if (line >> c)
deba@165
  1894
	  throw DataFormatError("Extra character on the end of line");	  
deba@165
  1895
deba@165
  1896
	{
deba@165
  1897
	  std::set<std::string>::iterator it = read_attr.find(attr);
deba@165
  1898
	  if (it != read_attr.end()) {
deba@165
  1899
	    std::ostringstream msg;
deba@165
  1900
	    msg << "Multiple occurence of attribute " << attr;
deba@165
  1901
	    throw DataFormatError(msg.str().c_str());
deba@165
  1902
	  }
deba@165
  1903
	  read_attr.insert(attr);
deba@165
  1904
	}
deba@165
  1905
	
deba@165
  1906
	{
deba@165
  1907
	  typename Attributes::iterator it = _attributes.lower_bound(attr);
deba@165
  1908
	  while (it != _attributes.end() && it->first == attr) {
deba@165
  1909
	    it->second->set(token);
deba@165
  1910
	    ++it;
deba@165
  1911
	  }
deba@165
  1912
	}
deba@165
  1913
deba@165
  1914
      }
deba@165
  1915
      if (readSuccess()) {
deba@165
  1916
	line.putback(c);
deba@165
  1917
      }
deba@165
  1918
      for (typename Attributes::iterator it = _attributes.begin();
deba@165
  1919
	   it != _attributes.end(); ++it) {
deba@165
  1920
	if (read_attr.find(it->first) == read_attr.end()) {
deba@165
  1921
	  std::ostringstream msg;
deba@165
  1922
	  msg << "Attribute not found in file: " << it->first;
deba@165
  1923
	  throw DataFormatError(msg.str().c_str());
deba@165
  1924
	}	
deba@165
  1925
      }
deba@165
  1926
    }
deba@165
  1927
deba@165
  1928
  public:
deba@165
  1929
deba@165
  1930
    /// \name Execution of the reader    
deba@165
  1931
    /// @{
deba@165
  1932
deba@165
  1933
    /// \brief Start the batch processing
deba@165
  1934
    ///
deba@165
  1935
    /// This function starts the batch processing
deba@165
  1936
    void run() {
deba@165
  1937
      
deba@165
  1938
      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
deba@165
  1939
      
deba@188
  1940
      bool nodes_done = _skip_nodes;
deba@188
  1941
      bool edges_done = _skip_edges;
deba@165
  1942
      bool attributes_done = false;
deba@165
  1943
deba@165
  1944
      line_num = 0;      
deba@165
  1945
      readLine();
deba@172
  1946
      skipSection();
deba@165
  1947
deba@165
  1948
      while (readSuccess()) {
deba@165
  1949
	try {
deba@165
  1950
	  char c;
deba@165
  1951
	  std::string section, caption;
deba@165
  1952
	  line >> c;
deba@165
  1953
	  _reader_bits::readToken(line, section);
deba@165
  1954
	  _reader_bits::readToken(line, caption);
deba@165
  1955
deba@165
  1956
	  if (line >> c) 
deba@165
  1957
	    throw DataFormatError("Extra character on the end of line");
deba@165
  1958
deba@165
  1959
	  if (section == "nodes" && !nodes_done) {
deba@165
  1960
	    if (_nodes_caption.empty() || _nodes_caption == caption) {
deba@165
  1961
	      readNodes();
deba@165
  1962
	      nodes_done = true;
deba@165
  1963
	    }
deba@165
  1964
	  } else if ((section == "edges" || section == "arcs") && 
deba@165
  1965
		     !edges_done) {
deba@165
  1966
	    if (_edges_caption.empty() || _edges_caption == caption) {
deba@165
  1967
	      readEdges();
deba@165
  1968
	      edges_done = true;
deba@165
  1969
	    }
deba@165
  1970
	  } else if (section == "attributes" && !attributes_done) {
deba@165
  1971
	    if (_attributes_caption.empty() || _attributes_caption == caption) {
deba@165
  1972
	      readAttributes();
deba@165
  1973
	      attributes_done = true;
deba@165
  1974
	    }
deba@165
  1975
	  } else {
deba@172
  1976
	    readLine();
deba@172
  1977
	    skipSection();
deba@165
  1978
	  }
deba@165
  1979
	} catch (DataFormatError& error) {
deba@165
  1980
	  error.line(line_num);
deba@165
  1981
	  throw;
deba@165
  1982
	}	
deba@165
  1983
      }
deba@165
  1984
deba@165
  1985
      if (!nodes_done) {
deba@165
  1986
	throw DataFormatError("Section @nodes not found");
deba@165
  1987
      }
deba@165
  1988
deba@165
  1989
      if (!edges_done) {
deba@165
  1990
	throw DataFormatError("Section @edges not found");
deba@165
  1991
      }
deba@165
  1992
deba@165
  1993
      if (!attributes_done && !_attributes.empty()) {
deba@165
  1994
	throw DataFormatError("Section @attributes not found");
deba@165
  1995
      }
deba@165
  1996
deba@165
  1997
    }
deba@165
  1998
deba@165
  1999
    /// @}
deba@165
  2000
    
deba@165
  2001
  };
deba@165
  2002
kpeter@192
  2003
  /// \brief Return a \ref GraphReader class
kpeter@192
  2004
  /// 
kpeter@192
  2005
  /// This function just returns a \ref GraphReader class.
deba@165
  2006
  /// \relates GraphReader
deba@165
  2007
  template <typename Graph>
deba@165
  2008
  GraphReader<Graph> graphReader(std::istream& is, Graph& graph) {
deba@165
  2009
    GraphReader<Graph> tmp(is, graph);
deba@165
  2010
    return tmp;
deba@165
  2011
  }
deba@165
  2012
kpeter@192
  2013
  /// \brief Return a \ref GraphReader class
kpeter@192
  2014
  /// 
kpeter@192
  2015
  /// This function just returns a \ref GraphReader class.
deba@165
  2016
  /// \relates GraphReader
deba@165
  2017
  template <typename Graph>
deba@165
  2018
  GraphReader<Graph> graphReader(const std::string& fn, 
deba@165
  2019
				       Graph& graph) {
deba@165
  2020
    GraphReader<Graph> tmp(fn, graph);
deba@165
  2021
    return tmp;
deba@165
  2022
  }
deba@165
  2023
kpeter@192
  2024
  /// \brief Return a \ref GraphReader class
kpeter@192
  2025
  /// 
kpeter@192
  2026
  /// This function just returns a \ref GraphReader class.
deba@165
  2027
  /// \relates GraphReader
deba@165
  2028
  template <typename Graph>
deba@165
  2029
  GraphReader<Graph> graphReader(const char* fn, Graph& graph) {
deba@165
  2030
    GraphReader<Graph> tmp(fn, graph);
deba@165
  2031
    return tmp;
deba@165
  2032
  }
deba@173
  2033
deba@190
  2034
  class SectionReader;
deba@190
  2035
deba@190
  2036
  SectionReader sectionReader(std::istream& is);
deba@190
  2037
  SectionReader sectionReader(const std::string& fn);
deba@190
  2038
  SectionReader sectionReader(const char* fn);
deba@190
  2039
  
kpeter@192
  2040
  /// \ingroup lemon_io
kpeter@192
  2041
  ///
deba@189
  2042
  /// \brief Section reader class
deba@189
  2043
  ///
kpeter@192
  2044
  /// In the \ref lgf-format "LGF" file extra sections can be placed, 
kpeter@192
  2045
  /// which contain any data in arbitrary format. Such sections can be
kpeter@192
  2046
  /// read with this class. A reading rule can be added to the class 
kpeter@192
  2047
  /// with two different functions. With the \c sectionLines() function a
kpeter@192
  2048
  /// functor can process the section line-by-line, while with the \c
deba@189
  2049
  /// sectionStream() member the section can be read from an input
deba@189
  2050
  /// stream.
deba@189
  2051
  class SectionReader {
deba@189
  2052
  private:
deba@189
  2053
    
deba@189
  2054
    std::istream* _is;
deba@189
  2055
    bool local_is;
deba@189
  2056
deba@189
  2057
    typedef std::map<std::string, _reader_bits::Section*> Sections;
deba@189
  2058
    Sections _sections;
deba@189
  2059
deba@189
  2060
    int line_num;
deba@189
  2061
    std::istringstream line;
deba@189
  2062
deba@189
  2063
  public:
deba@189
  2064
deba@189
  2065
    /// \brief Constructor
deba@189
  2066
    ///
deba@189
  2067
    /// Construct a section reader, which reads from the given input
deba@189
  2068
    /// stream.
deba@189
  2069
    SectionReader(std::istream& is) 
deba@189
  2070
      : _is(&is), local_is(false) {}
deba@189
  2071
deba@189
  2072
    /// \brief Constructor
deba@189
  2073
    ///
deba@189
  2074
    /// Construct a section reader, which reads from the given file.
deba@189
  2075
    SectionReader(const std::string& fn) 
deba@189
  2076
      : _is(new std::ifstream(fn.c_str())), local_is(true) {}
deba@189
  2077
    
deba@189
  2078
    /// \brief Constructor
deba@189
  2079
    ///
deba@189
  2080
    /// Construct a section reader, which reads from the given file.
deba@189
  2081
    SectionReader(const char* fn) 
deba@189
  2082
      : _is(new std::ifstream(fn)), local_is(true) {}
deba@189
  2083
deba@189
  2084
    /// \brief Destructor
deba@189
  2085
    ~SectionReader() {
deba@189
  2086
      for (Sections::iterator it = _sections.begin(); 
deba@189
  2087
	   it != _sections.end(); ++it) {
deba@189
  2088
	delete it->second;
deba@189
  2089
      }
deba@189
  2090
deba@189
  2091
      if (local_is) {
deba@189
  2092
	delete _is;
deba@189
  2093
      }
deba@189
  2094
deba@189
  2095
    }
deba@189
  2096
deba@189
  2097
  private:
deba@190
  2098
deba@190
  2099
    friend SectionReader sectionReader(std::istream& is);
deba@190
  2100
    friend SectionReader sectionReader(const std::string& fn);
deba@190
  2101
    friend SectionReader sectionReader(const char* fn);
deba@190
  2102
deba@190
  2103
    SectionReader(SectionReader& other) 
deba@190
  2104
      : _is(other._is), local_is(other.local_is) {
deba@190
  2105
deba@190
  2106
      other._is = 0;
deba@190
  2107
      other.local_is = false;
deba@190
  2108
      
deba@190
  2109
      _sections.swap(other._sections);
deba@190
  2110
    }
deba@189
  2111
    
deba@189
  2112
    SectionReader& operator=(const SectionReader&);
deba@189
  2113
deba@189
  2114
  public:
deba@189
  2115
deba@189
  2116
    /// \name Section readers
deba@189
  2117
    /// @{
deba@189
  2118
deba@189
  2119
    /// \brief Add a section processor with line oriented reading
deba@189
  2120
    ///
deba@189
  2121
    /// The first parameter is the type descriptor of the section, the
deba@189
  2122
    /// second is a functor, which takes just one \c std::string
deba@189
  2123
    /// parameter. At the reading process, each line of the section
deba@189
  2124
    /// will be given to the functor object. However, the empty lines
deba@189
  2125
    /// and the comment lines are filtered out, and the leading
deba@189
  2126
    /// whitespaces are trimmed from each processed string.
deba@189
  2127
    ///
deba@189
  2128
    /// For example let's see a section, which contain several
deba@189
  2129
    /// integers, which should be inserted into a vector.
deba@189
  2130
    ///\code
deba@189
  2131
    ///  @numbers
deba@189
  2132
    ///  12 45 23
deba@189
  2133
    ///  4
deba@189
  2134
    ///  23 6
deba@189
  2135
    ///\endcode
deba@189
  2136
    ///
kpeter@192
  2137
    /// The functor is implemented as a struct:
deba@189
  2138
    ///\code
deba@189
  2139
    ///  struct NumberSection {
deba@189
  2140
    ///    std::vector<int>& _data;
deba@189
  2141
    ///    NumberSection(std::vector<int>& data) : _data(data) {}
deba@189
  2142
    ///    void operator()(const std::string& line) {
deba@189
  2143
    ///      std::istringstream ls(line);
deba@189
  2144
    ///      int value;
deba@189
  2145
    ///      while (ls >> value) _data.push_back(value);
deba@189
  2146
    ///    }
deba@189
  2147
    ///  };
deba@189
  2148
    ///
deba@189
  2149
    ///  // ...
deba@189
  2150
    ///
deba@189
  2151
    ///  reader.sectionLines("numbers", NumberSection(vec));  
deba@189
  2152
    ///\endcode
deba@189
  2153
    template <typename Functor>
deba@189
  2154
    SectionReader& sectionLines(const std::string& type, Functor functor) {
kpeter@192
  2155
      LEMON_ASSERT(!type.empty(), "Type is empty.");
deba@189
  2156
      LEMON_ASSERT(_sections.find(type) == _sections.end(), 
deba@189
  2157
		   "Multiple reading of section.");
deba@189
  2158
      _sections.insert(std::make_pair(type, 
deba@189
  2159
        new _reader_bits::LineSection<Functor>(functor)));
deba@189
  2160
      return *this;
deba@189
  2161
    }
deba@189
  2162
deba@189
  2163
deba@189
  2164
    /// \brief Add a section processor with stream oriented reading
deba@189
  2165
    ///
deba@189
  2166
    /// The first parameter is the type of the section, the second is
kpeter@192
  2167
    /// a functor, which takes an \c std::istream& and an \c int&
deba@189
  2168
    /// parameter, the latter regard to the line number of stream. The
deba@189
  2169
    /// functor can read the input while the section go on, and the
deba@189
  2170
    /// line number should be modified accordingly.
deba@189
  2171
    template <typename Functor>
deba@189
  2172
    SectionReader& sectionStream(const std::string& type, Functor functor) {
kpeter@192
  2173
      LEMON_ASSERT(!type.empty(), "Type is empty.");
deba@189
  2174
      LEMON_ASSERT(_sections.find(type) == _sections.end(), 
deba@189
  2175
		   "Multiple reading of section.");
deba@189
  2176
      _sections.insert(std::make_pair(type, 
deba@189
  2177
	 new _reader_bits::StreamSection<Functor>(functor)));
deba@189
  2178
      return *this;
deba@189
  2179
    }    
deba@189
  2180
    
deba@189
  2181
    /// @}
deba@189
  2182
deba@189
  2183
  private:
deba@189
  2184
deba@189
  2185
    bool readLine() {
deba@189
  2186
      std::string str;
deba@189
  2187
      while(++line_num, std::getline(*_is, str)) {
deba@189
  2188
	line.clear(); line.str(str);
deba@189
  2189
	char c;
deba@189
  2190
	if (line >> std::ws >> c && c != '#') {
deba@189
  2191
	  line.putback(c);
deba@189
  2192
	  return true;
deba@189
  2193
	}
deba@189
  2194
      }
deba@189
  2195
      return false;
deba@189
  2196
    }
deba@189
  2197
deba@189
  2198
    bool readSuccess() {
deba@189
  2199
      return static_cast<bool>(*_is);
deba@189
  2200
    }
deba@189
  2201
    
deba@189
  2202
    void skipSection() {
deba@189
  2203
      char c;
deba@189
  2204
      while (readSuccess() && line >> c && c != '@') {
deba@189
  2205
	readLine();
deba@189
  2206
      }
deba@189
  2207
      line.putback(c);
deba@189
  2208
    }
deba@189
  2209
deba@189
  2210
  public:
deba@189
  2211
deba@189
  2212
deba@189
  2213
    /// \name Execution of the reader    
deba@189
  2214
    /// @{
deba@189
  2215
deba@189
  2216
    /// \brief Start the batch processing
deba@189
  2217
    ///
kpeter@192
  2218
    /// This function starts the batch processing.
deba@189
  2219
    void run() {
deba@189
  2220
      
deba@189
  2221
      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
deba@189
  2222
      
deba@189
  2223
      std::set<std::string> extra_sections;
deba@189
  2224
deba@189
  2225
      line_num = 0;      
deba@189
  2226
      readLine();
deba@189
  2227
      skipSection();
deba@189
  2228
deba@189
  2229
      while (readSuccess()) {
deba@189
  2230
	try {
deba@189
  2231
	  char c;
deba@189
  2232
	  std::string section, caption;
deba@189
  2233
	  line >> c;
deba@189
  2234
	  _reader_bits::readToken(line, section);
deba@189
  2235
	  _reader_bits::readToken(line, caption);
deba@189
  2236
deba@189
  2237
	  if (line >> c) 
deba@189
  2238
	    throw DataFormatError("Extra character on the end of line");
deba@189
  2239
deba@189
  2240
	  if (extra_sections.find(section) != extra_sections.end()) {
deba@189
  2241
	    std::ostringstream msg;
deba@189
  2242
	    msg << "Multiple occurence of section " << section;
deba@189
  2243
	    throw DataFormatError(msg.str().c_str());
deba@189
  2244
	  }
deba@189
  2245
	  Sections::iterator it = _sections.find(section);
deba@189
  2246
	  if (it != _sections.end()) {
deba@189
  2247
	    extra_sections.insert(section);
deba@189
  2248
	    it->second->process(*_is, line_num);
deba@189
  2249
	  }
deba@189
  2250
	  readLine();
deba@189
  2251
	  skipSection();
deba@189
  2252
	} catch (DataFormatError& error) {
deba@189
  2253
	  error.line(line_num);
deba@189
  2254
	  throw;
deba@189
  2255
	}	
deba@189
  2256
      }
deba@189
  2257
      for (Sections::iterator it = _sections.begin();
deba@189
  2258
	   it != _sections.end(); ++it) {
deba@189
  2259
	if (extra_sections.find(it->first) == extra_sections.end()) {
deba@189
  2260
	  std::ostringstream os;
deba@189
  2261
	  os << "Cannot find section: " << it->first;
deba@189
  2262
	  throw DataFormatError(os.str().c_str());
deba@189
  2263
	}
deba@189
  2264
      }
deba@189
  2265
    }
deba@189
  2266
deba@189
  2267
    /// @}
deba@189
  2268
        
deba@189
  2269
  };
deba@189
  2270
kpeter@192
  2271
  /// \brief Return a \ref SectionReader class
kpeter@192
  2272
  /// 
kpeter@192
  2273
  /// This function just returns a \ref SectionReader class.
deba@189
  2274
  /// \relates SectionReader
deba@189
  2275
  inline SectionReader sectionReader(std::istream& is) {
deba@189
  2276
    SectionReader tmp(is);
deba@189
  2277
    return tmp;
deba@189
  2278
  }
deba@189
  2279
kpeter@192
  2280
  /// \brief Return a \ref SectionReader class
kpeter@192
  2281
  /// 
kpeter@192
  2282
  /// This function just returns a \ref SectionReader class.
deba@189
  2283
  /// \relates SectionReader
deba@189
  2284
  inline SectionReader sectionReader(const std::string& fn) {
deba@189
  2285
    SectionReader tmp(fn);
deba@189
  2286
    return tmp;
deba@189
  2287
  }
deba@189
  2288
kpeter@192
  2289
  /// \brief Return a \ref SectionReader class
kpeter@192
  2290
  /// 
kpeter@192
  2291
  /// This function just returns a \ref SectionReader class.
deba@189
  2292
  /// \relates SectionReader
deba@189
  2293
  inline SectionReader sectionReader(const char* fn) {
deba@189
  2294
    SectionReader tmp(fn);
deba@189
  2295
    return tmp;
deba@189
  2296
  }
deba@189
  2297
deba@173
  2298
  /// \ingroup lemon_io
deba@173
  2299
  ///
alpar@179
  2300
  /// \brief Reader for the contents of the \ref lgf-format "LGF" file 
deba@173
  2301
  ///
deba@173
  2302
  /// This class can be used to read the sections, the map names and
deba@173
  2303
  /// the attributes from a file. Usually, the Lemon programs know
deba@173
  2304
  /// that, which type of graph, which maps and which attributes
deba@173
  2305
  /// should be read from a file, but in general tools (like glemon)
alpar@179
  2306
  /// the contents of an LGF file should be guessed somehow. This class
deba@173
  2307
  /// reads the graph and stores the appropriate information for
deba@173
  2308
  /// reading the graph.
deba@173
  2309
  ///
kpeter@192
  2310
  ///\code 
kpeter@192
  2311
  /// LgfContents contents("graph.lgf"); 
alpar@179
  2312
  /// contents.run();
deba@173
  2313
  ///
kpeter@192
  2314
  /// // Does it contain any node section and arc section?
alpar@179
  2315
  /// if (contents.nodeSectionNum() == 0 || contents.arcSectionNum()) {
kpeter@192
  2316
  ///   std::cerr << "Failure, cannot find graph." << std::endl;
deba@173
  2317
  ///   return -1;
deba@173
  2318
  /// }
kpeter@192
  2319
  /// std::cout << "The name of the default node section: " 
alpar@179
  2320
  ///           << contents.nodeSection(0) << std::endl;
kpeter@192
  2321
  /// std::cout << "The number of the arc maps: " 
alpar@179
  2322
  ///           << contents.arcMaps(0).size() << std::endl;
kpeter@192
  2323
  /// std::cout << "The name of second arc map: " 
alpar@179
  2324
  ///           << contents.arcMaps(0)[1] << std::endl;
deba@173
  2325
  ///\endcode
alpar@179
  2326
  class LgfContents {    
deba@173
  2327
  private:
deba@173
  2328
deba@173
  2329
    std::istream* _is;
deba@173
  2330
    bool local_is;
deba@173
  2331
deba@173
  2332
    std::vector<std::string> _node_sections;
deba@173
  2333
    std::vector<std::string> _edge_sections;
deba@173
  2334
    std::vector<std::string> _attribute_sections;
deba@173
  2335
    std::vector<std::string> _extra_sections;
deba@173
  2336
deba@173
  2337
    std::vector<bool> _arc_sections;
deba@173
  2338
deba@173
  2339
    std::vector<std::vector<std::string> > _node_maps;
deba@173
  2340
    std::vector<std::vector<std::string> > _edge_maps;
deba@173
  2341
deba@173
  2342
    std::vector<std::vector<std::string> > _attributes;
deba@173
  2343
deba@173
  2344
deba@173
  2345
    int line_num;
deba@173
  2346
    std::istringstream line;
deba@173
  2347
    
deba@173
  2348
  public:
deba@173
  2349
deba@173
  2350
    /// \brief Constructor
deba@173
  2351
    ///
alpar@179
  2352
    /// Construct an \e LGF contents reader, which reads from the given
deba@173
  2353
    /// input stream.
alpar@179
  2354
    LgfContents(std::istream& is) 
deba@173
  2355
      : _is(&is), local_is(false) {}
deba@173
  2356
deba@173
  2357
    /// \brief Constructor
deba@173
  2358
    ///
alpar@179
  2359
    /// Construct an \e LGF contents reader, which reads from the given
deba@173
  2360
    /// file.
alpar@179
  2361
    LgfContents(const std::string& fn) 
deba@173
  2362
      : _is(new std::ifstream(fn.c_str())), local_is(true) {}
deba@173
  2363
deba@173
  2364
    /// \brief Constructor
deba@173
  2365
    ///
alpar@179
  2366
    /// Construct an \e LGF contents reader, which reads from the given
deba@173
  2367
    /// file.
alpar@179
  2368
    LgfContents(const char* fn)
deba@173
  2369
      : _is(new std::ifstream(fn)), local_is(true) {}
deba@173
  2370
    
deba@173
  2371
    /// \brief Destructor
alpar@179
  2372
    ~LgfContents() {
deba@173
  2373
      if (local_is) delete _is;
deba@173
  2374
    }
deba@173
  2375
deba@190
  2376
  private:
deba@190
  2377
    
deba@190
  2378
    LgfContents(const LgfContents&);
deba@190
  2379
    LgfContents& operator=(const LgfContents&);
deba@190
  2380
deba@190
  2381
  public:
deba@190
  2382
deba@173
  2383
deba@173
  2384
    /// \name Node sections
deba@173
  2385
    /// @{
deba@173
  2386
deba@173
  2387
    /// \brief Gives back the number of node sections in the file.
deba@173
  2388
    ///
deba@173
  2389
    /// Gives back the number of node sections in the file.
deba@173
  2390
    int nodeSectionNum() const {
deba@173
  2391
      return _node_sections.size();
deba@173
  2392
    }
deba@173
  2393
kpeter@192
  2394
    /// \brief Returns the node section name at the given position. 
deba@173
  2395
    ///
kpeter@192
  2396
    /// Returns the node section name at the given position. 
deba@173
  2397
    const std::string& nodeSection(int i) const {
deba@173
  2398
      return _node_sections[i];
deba@173
  2399
    }
deba@173
  2400
deba@173
  2401
    /// \brief Gives back the node maps for the given section.
deba@173
  2402
    ///
deba@173
  2403
    /// Gives back the node maps for the given section.
alpar@182
  2404
    const std::vector<std::string>& nodeMapNames(int i) const {
deba@173
  2405
      return _node_maps[i];
deba@173
  2406
    }
deba@173
  2407
deba@173
  2408
    /// @}
deba@173
  2409
alpar@181
  2410
    /// \name Arc/Edge sections 
deba@173
  2411
    /// @{
deba@173
  2412
alpar@181
  2413
    /// \brief Gives back the number of arc/edge sections in the file.
deba@173
  2414
    ///
alpar@181
  2415
    /// Gives back the number of arc/edge sections in the file.
alpar@181
  2416
    /// \note It is synonym of \c edgeSectionNum().
deba@173
  2417
    int arcSectionNum() const {
deba@173
  2418
      return _edge_sections.size();
deba@173
  2419
    }
deba@173
  2420
kpeter@192
  2421
    /// \brief Returns the arc/edge section name at the given position. 
deba@173
  2422
    ///
kpeter@192
  2423
    /// Returns the arc/edge section name at the given position. 
alpar@181
  2424
    /// \note It is synonym of \c edgeSection().
deba@173
  2425
    const std::string& arcSection(int i) const {
deba@173
  2426
      return _edge_sections[i];
deba@173
  2427
    }
deba@173
  2428
alpar@181
  2429
    /// \brief Gives back the arc/edge maps for the given section.
deba@173
  2430
    ///
alpar@181
  2431
    /// Gives back the arc/edge maps for the given section.
alpar@182
  2432
    /// \note It is synonym of \c edgeMapNames().
alpar@182
  2433
    const std::vector<std::string>& arcMapNames(int i) const {
deba@173
  2434
      return _edge_maps[i];
deba@173
  2435
    }
deba@173
  2436
deba@173
  2437
    /// @}
deba@173
  2438
alpar@181
  2439
    /// \name Synonyms
deba@173
  2440
    /// @{
deba@173
  2441
alpar@181
  2442
    /// \brief Gives back the number of arc/edge sections in the file.
deba@173
  2443
    ///
alpar@181
  2444
    /// Gives back the number of arc/edge sections in the file.
alpar@181
  2445
    /// \note It is synonym of \c arcSectionNum().
deba@173
  2446
    int edgeSectionNum() const {
deba@173
  2447
      return _edge_sections.size();
deba@173
  2448
    }
deba@173
  2449
deba@173
  2450
    /// \brief Returns the section name at the given position. 
deba@173
  2451
    ///
deba@173
  2452
    /// Returns the section name at the given position. 
alpar@181
  2453
    /// \note It is synonym of \c arcSection().
deba@173
  2454
    const std::string& edgeSection(int i) const {
deba@173
  2455
      return _edge_sections[i];
deba@173
  2456
    }
deba@173
  2457
deba@173
  2458
    /// \brief Gives back the edge maps for the given section.
deba@173
  2459
    ///
deba@173
  2460
    /// Gives back the edge maps for the given section.
alpar@182
  2461
    /// \note It is synonym of \c arcMapNames().
alpar@182
  2462
    const std::vector<std::string>& edgeMapNames(int i) const {
deba@173
  2463
      return _edge_maps[i];
deba@173
  2464
    }
deba@173
  2465
deba@173
  2466
    /// @}
deba@173
  2467
deba@173
  2468
    /// \name Attribute sections   
deba@173
  2469
    /// @{
deba@173
  2470
deba@173
  2471
    /// \brief Gives back the number of attribute sections in the file.
deba@173
  2472
    ///
deba@173
  2473
    /// Gives back the number of attribute sections in the file.
deba@173
  2474
    int attributeSectionNum() const {
deba@173
  2475
      return _attribute_sections.size();
deba@173
  2476
    }
deba@173
  2477
kpeter@192
  2478
    /// \brief Returns the attribute section name at the given position. 
deba@173
  2479
    ///
kpeter@192
  2480
    /// Returns the attribute section name at the given position. 
alpar@182
  2481
    const std::string& attributeSectionNames(int i) const {
deba@173
  2482
      return _attribute_sections[i];
deba@173
  2483
    }
deba@173
  2484
deba@173
  2485
    /// \brief Gives back the attributes for the given section.
deba@173
  2486
    ///
deba@173
  2487
    /// Gives back the attributes for the given section.
deba@173
  2488
    const std::vector<std::string>& attributes(int i) const {
deba@173
  2489
      return _attributes[i];
deba@173
  2490
    }
deba@173
  2491
deba@173
  2492
    /// @}
deba@173
  2493
deba@173
  2494
    /// \name Extra sections   
deba@173
  2495
    /// @{
deba@173
  2496
deba@173
  2497
    /// \brief Gives back the number of extra sections in the file.
deba@173
  2498
    ///
deba@173
  2499
    /// Gives back the number of extra sections in the file.
deba@173
  2500
    int extraSectionNum() const {
deba@173
  2501
      return _extra_sections.size();
deba@173
  2502
    }
deba@173
  2503
deba@173
  2504
    /// \brief Returns the extra section type at the given position. 
deba@173
  2505
    ///
deba@173
  2506
    /// Returns the section type at the given position. 
deba@173
  2507
    const std::string& extraSection(int i) const {
deba@173
  2508
      return _extra_sections[i];
deba@173
  2509
    }
deba@173
  2510
deba@173
  2511
    /// @}
deba@173
  2512
deba@173
  2513
  private:
deba@173
  2514
deba@173
  2515
    bool readLine() {
deba@173
  2516
      std::string str;
deba@173
  2517
      while(++line_num, std::getline(*_is, str)) {
deba@173
  2518
	line.clear(); line.str(str);
deba@173
  2519
	char c;
deba@173
  2520
	if (line >> std::ws >> c && c != '#') {
deba@173
  2521
	  line.putback(c);
deba@173
  2522
	  return true;
deba@173
  2523
	}
deba@173
  2524
      }
deba@173
  2525
      return false;
deba@173
  2526
    }
deba@173
  2527
deba@173
  2528
    bool readSuccess() {
deba@173
  2529
      return static_cast<bool>(*_is);
deba@173
  2530
    }
deba@173
  2531
deba@173
  2532
    void skipSection() {
deba@173
  2533
      char c;
deba@173
  2534
      while (readSuccess() && line >> c && c != '@') {
deba@173
  2535
	readLine();
deba@173
  2536
      }
deba@173
  2537
      line.putback(c);
deba@173
  2538
    }
deba@173
  2539
deba@173
  2540
    void readMaps(std::vector<std::string>& maps) {
deba@186
  2541
      char c;
deba@186
  2542
      if (!readLine() || !(line >> c) || c == '@') {
deba@186
  2543
	if (readSuccess() && line) line.putback(c);
deba@186
  2544
	return;
deba@186
  2545
      }
deba@186
  2546
      line.putback(c);
deba@173
  2547
      std::string map;
deba@173
  2548
      while (_reader_bits::readToken(line, map)) {
deba@173
  2549
	maps.push_back(map);
deba@173
  2550
      }
deba@173
  2551
    }
deba@173
  2552
deba@173
  2553
    void readAttributes(std::vector<std::string>& attrs) {
deba@173
  2554
      readLine();
deba@173
  2555
      char c;
deba@173
  2556
      while (readSuccess() && line >> c && c != '@') {
deba@173
  2557
	line.putback(c);
deba@173
  2558
	std::string attr;
deba@173
  2559
	_reader_bits::readToken(line, attr);
deba@173
  2560
	attrs.push_back(attr);
deba@173
  2561
	readLine();
deba@173
  2562
      }
deba@173
  2563
      line.putback(c);
deba@173
  2564
    }
deba@173
  2565
deba@173
  2566
  public:
deba@173
  2567
alpar@179
  2568
    /// \name Execution of the contents reader    
deba@173
  2569
    /// @{
deba@173
  2570
kpeter@192
  2571
    /// \brief Starts the reading
deba@173
  2572
    ///
kpeter@192
  2573
    /// This function starts the reading.
deba@173
  2574
    void run() {
deba@173
  2575
deba@173
  2576
      readLine();
deba@173
  2577
      skipSection();
deba@173
  2578
deba@173
  2579
      while (readSuccess()) {
deba@173
  2580
deba@173
  2581
	char c;
deba@173
  2582
	line >> c;
deba@173
  2583
deba@173
  2584
	std::string section, caption;
deba@173
  2585
	_reader_bits::readToken(line, section);
deba@173
  2586
	_reader_bits::readToken(line, caption);
deba@173
  2587
deba@173
  2588
	if (section == "nodes") {
deba@173
  2589
	  _node_sections.push_back(caption);
deba@173
  2590
	  _node_maps.push_back(std::vector<std::string>());
deba@173
  2591
	  readMaps(_node_maps.back());
deba@173
  2592
	  readLine(); skipSection();
deba@173
  2593
	} else if (section == "arcs" || section == "edges") {
deba@173
  2594
	  _edge_sections.push_back(caption);
deba@173
  2595
	  _arc_sections.push_back(section == "arcs");
deba@173
  2596
	  _edge_maps.push_back(std::vector<std::string>());
deba@173
  2597
	  readMaps(_edge_maps.back());
deba@173
  2598
	  readLine(); skipSection();
deba@173
  2599
	} else if (section == "attributes") {
deba@173
  2600
	  _attribute_sections.push_back(caption);
deba@173
  2601
	  _attributes.push_back(std::vector<std::string>());
deba@173
  2602
	  readAttributes(_attributes.back());
deba@173
  2603
	} else {
deba@173
  2604
	  _extra_sections.push_back(section);
deba@173
  2605
	  readLine(); skipSection();
deba@173
  2606
	}
deba@173
  2607
      }
deba@173
  2608
    }
deba@173
  2609
deba@173
  2610
    /// @}
deba@173
  2611
    
deba@173
  2612
  };
deba@127
  2613
}
deba@127
  2614
deba@127
  2615
#endif