lemon/lgf_reader.h
author Peter Kovacs <kpeter@inf.elte.hu>
Tue, 24 Feb 2009 09:46:02 +0100
changeset 601 e8349c6f12ca
parent 440 88ed40ad0d4f
parent 487 afd134142111
child 559 c5fd2d996909
permissions -rw-r--r--
Port NetworkSimplex from SVN -r3520 (#234)
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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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) 2003-2009
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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/core.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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        if (!(is >> value)) {
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          throw FormatError("Cannot read token");
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        }
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        char c;
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        if (is >> std::ws >> c) {
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          throw FormatError("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 FormatError(msg.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 FormatError("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 FormatError("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 FormatError("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 FormatError("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 FormatError("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 FormatError("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(Digraph& digraph, 
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                                       std::istream& is = std::cin);
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  template <typename Digraph>
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  DigraphReader<Digraph> digraphReader(Digraph& digraph, const std::string& fn);
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  template <typename Digraph>
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  DigraphReader<Digraph> digraphReader(Digraph& digraph, const char *fn);
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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>(digraph, std::cin).
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  ///   nodeMap("coordinates", coord_map).
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   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
alpar@210
   447
  /// paths are given as a node map or an arc map.
alpar@210
   448
  /// It is impossible to read this in
alpar@156
   449
  /// a single pass, because the arcs are not constructed when the node
alpar@156
   450
  /// maps are read.
deba@127
   451
  template <typename _Digraph>
deba@127
   452
  class DigraphReader {
deba@127
   453
  public:
deba@127
   454
deba@127
   455
    typedef _Digraph Digraph;
deba@148
   456
    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
alpar@209
   457
deba@127
   458
  private:
deba@127
   459
deba@127
   460
deba@127
   461
    std::istream* _is;
deba@127
   462
    bool local_is;
deba@290
   463
    std::string _filename;
deba@127
   464
deba@127
   465
    Digraph& _digraph;
deba@127
   466
deba@127
   467
    std::string _nodes_caption;
deba@127
   468
    std::string _arcs_caption;
deba@127
   469
    std::string _attributes_caption;
deba@127
   470
deba@127
   471
    typedef std::map<std::string, Node> NodeIndex;
deba@127
   472
    NodeIndex _node_index;
deba@127
   473
    typedef std::map<std::string, Arc> ArcIndex;
deba@127
   474
    ArcIndex _arc_index;
alpar@209
   475
alpar@209
   476
    typedef std::vector<std::pair<std::string,
alpar@209
   477
      _reader_bits::MapStorageBase<Node>*> > NodeMaps;
alpar@209
   478
    NodeMaps _node_maps;
deba@127
   479
deba@127
   480
    typedef std::vector<std::pair<std::string,
deba@127
   481
      _reader_bits::MapStorageBase<Arc>*> >ArcMaps;
deba@127
   482
    ArcMaps _arc_maps;
deba@127
   483
alpar@209
   484
    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*>
deba@127
   485
      Attributes;
deba@127
   486
    Attributes _attributes;
deba@127
   487
deba@127
   488
    bool _use_nodes;
deba@127
   489
    bool _use_arcs;
deba@127
   490
deba@188
   491
    bool _skip_nodes;
deba@188
   492
    bool _skip_arcs;
deba@188
   493
deba@127
   494
    int line_num;
deba@127
   495
    std::istringstream line;
deba@127
   496
deba@127
   497
  public:
deba@127
   498
alpar@156
   499
    /// \brief Constructor
alpar@156
   500
    ///
alpar@156
   501
    /// Construct a directed graph reader, which reads from the given
alpar@156
   502
    /// input stream.
kpeter@293
   503
    DigraphReader(Digraph& digraph, std::istream& is = std::cin)
deba@127
   504
      : _is(&is), local_is(false), _digraph(digraph),
alpar@209
   505
        _use_nodes(false), _use_arcs(false),
alpar@209
   506
        _skip_nodes(false), _skip_arcs(false) {}
deba@127
   507
alpar@156
   508
    /// \brief Constructor
alpar@156
   509
    ///
alpar@156
   510
    /// Construct a directed graph reader, which reads from the given
alpar@156
   511
    /// file.
kpeter@293
   512
    DigraphReader(Digraph& digraph, const std::string& fn)
deba@290
   513
      : _is(new std::ifstream(fn.c_str())), local_is(true),
deba@290
   514
        _filename(fn), _digraph(digraph),
kpeter@212
   515
        _use_nodes(false), _use_arcs(false),
deba@290
   516
        _skip_nodes(false), _skip_arcs(false) {
deba@295
   517
      if (!(*_is)) {
deba@295
   518
        delete _is;
deba@295
   519
        throw IoError("Cannot open file", fn);
deba@295
   520
      }
deba@290
   521
    }
alpar@209
   522
alpar@156
   523
    /// \brief Constructor
alpar@156
   524
    ///
alpar@156
   525
    /// Construct a directed graph reader, which reads from the given
alpar@156
   526
    /// file.
kpeter@293
   527
    DigraphReader(Digraph& digraph, const char* fn)
deba@290
   528
      : _is(new std::ifstream(fn)), local_is(true),
deba@290
   529
        _filename(fn), _digraph(digraph),
kpeter@212
   530
        _use_nodes(false), _use_arcs(false),
deba@290
   531
        _skip_nodes(false), _skip_arcs(false) {
deba@295
   532
      if (!(*_is)) {
deba@295
   533
        delete _is;
deba@295
   534
        throw IoError("Cannot open file", fn);
deba@295
   535
      }
deba@290
   536
    }
deba@127
   537
alpar@156
   538
    /// \brief Destructor
deba@127
   539
    ~DigraphReader() {
alpar@209
   540
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   541
           it != _node_maps.end(); ++it) {
alpar@209
   542
        delete it->second;
deba@127
   543
      }
deba@127
   544
alpar@209
   545
      for (typename ArcMaps::iterator it = _arc_maps.begin();
alpar@209
   546
           it != _arc_maps.end(); ++it) {
alpar@209
   547
        delete it->second;
deba@127
   548
      }
deba@127
   549
alpar@209
   550
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
   551
           it != _attributes.end(); ++it) {
alpar@209
   552
        delete it->second;
deba@127
   553
      }
deba@127
   554
deba@127
   555
      if (local_is) {
alpar@209
   556
        delete _is;
deba@127
   557
      }
deba@127
   558
deba@127
   559
    }
deba@127
   560
deba@127
   561
  private:
deba@190
   562
kpeter@487
   563
    template <typename DGR>
kpeter@487
   564
    friend DigraphReader<DGR> digraphReader(DGR& digraph, std::istream& is);
kpeter@487
   565
    template <typename DGR>
kpeter@487
   566
    friend DigraphReader<DGR> digraphReader(DGR& digraph, 
kpeter@487
   567
                                            const std::string& fn);
kpeter@487
   568
    template <typename DGR>
kpeter@487
   569
    friend DigraphReader<DGR> digraphReader(DGR& digraph, const char *fn);
alpar@209
   570
alpar@209
   571
    DigraphReader(DigraphReader& other)
deba@190
   572
      : _is(other._is), local_is(other.local_is), _digraph(other._digraph),
alpar@209
   573
        _use_nodes(other._use_nodes), _use_arcs(other._use_arcs),
alpar@209
   574
        _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {
deba@190
   575
deba@190
   576
      other._is = 0;
deba@190
   577
      other.local_is = false;
alpar@209
   578
deba@190
   579
      _node_index.swap(other._node_index);
deba@190
   580
      _arc_index.swap(other._arc_index);
deba@190
   581
deba@190
   582
      _node_maps.swap(other._node_maps);
deba@190
   583
      _arc_maps.swap(other._arc_maps);
deba@190
   584
      _attributes.swap(other._attributes);
deba@190
   585
deba@190
   586
      _nodes_caption = other._nodes_caption;
deba@190
   587
      _arcs_caption = other._arcs_caption;
deba@190
   588
      _attributes_caption = other._attributes_caption;
deba@190
   589
deba@190
   590
    }
deba@190
   591
deba@127
   592
    DigraphReader& operator=(const DigraphReader&);
deba@127
   593
deba@127
   594
  public:
deba@127
   595
alpar@156
   596
    /// \name Reading rules
alpar@156
   597
    /// @{
alpar@209
   598
alpar@156
   599
    /// \brief Node map reading rule
alpar@156
   600
    ///
alpar@156
   601
    /// Add a node map reading rule to the reader.
deba@127
   602
    template <typename Map>
deba@127
   603
    DigraphReader& nodeMap(const std::string& caption, Map& map) {
deba@127
   604
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
alpar@209
   605
      _reader_bits::MapStorageBase<Node>* storage =
alpar@209
   606
        new _reader_bits::MapStorage<Node, Map>(map);
deba@127
   607
      _node_maps.push_back(std::make_pair(caption, storage));
deba@127
   608
      return *this;
deba@127
   609
    }
deba@127
   610
alpar@156
   611
    /// \brief Node map reading rule
alpar@156
   612
    ///
alpar@156
   613
    /// Add a node map reading rule with specialized converter to the
alpar@156
   614
    /// reader.
deba@127
   615
    template <typename Map, typename Converter>
alpar@209
   616
    DigraphReader& nodeMap(const std::string& caption, Map& map,
alpar@209
   617
                           const Converter& converter = Converter()) {
deba@127
   618
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
alpar@209
   619
      _reader_bits::MapStorageBase<Node>* storage =
alpar@209
   620
        new _reader_bits::MapStorage<Node, Map, Converter>(map, converter);
deba@127
   621
      _node_maps.push_back(std::make_pair(caption, storage));
deba@127
   622
      return *this;
deba@127
   623
    }
deba@127
   624
alpar@156
   625
    /// \brief Arc map reading rule
alpar@156
   626
    ///
alpar@156
   627
    /// Add an arc map reading rule to the reader.
deba@127
   628
    template <typename Map>
deba@127
   629
    DigraphReader& arcMap(const std::string& caption, Map& map) {
deba@127
   630
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
alpar@209
   631
      _reader_bits::MapStorageBase<Arc>* storage =
alpar@209
   632
        new _reader_bits::MapStorage<Arc, Map>(map);
deba@127
   633
      _arc_maps.push_back(std::make_pair(caption, storage));
deba@127
   634
      return *this;
deba@127
   635
    }
deba@127
   636
alpar@156
   637
    /// \brief Arc map reading rule
alpar@156
   638
    ///
alpar@156
   639
    /// Add an arc map reading rule with specialized converter to the
alpar@156
   640
    /// reader.
deba@127
   641
    template <typename Map, typename Converter>
alpar@209
   642
    DigraphReader& arcMap(const std::string& caption, Map& map,
alpar@209
   643
                          const Converter& converter = Converter()) {
deba@127
   644
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
alpar@209
   645
      _reader_bits::MapStorageBase<Arc>* storage =
alpar@209
   646
        new _reader_bits::MapStorage<Arc, Map, Converter>(map, converter);
deba@127
   647
      _arc_maps.push_back(std::make_pair(caption, storage));
deba@127
   648
      return *this;
deba@127
   649
    }
deba@127
   650
alpar@156
   651
    /// \brief Attribute reading rule
alpar@156
   652
    ///
alpar@156
   653
    /// Add an attribute reading rule to the reader.
deba@127
   654
    template <typename Value>
deba@127
   655
    DigraphReader& attribute(const std::string& caption, Value& value) {
alpar@209
   656
      _reader_bits::ValueStorageBase* storage =
alpar@209
   657
        new _reader_bits::ValueStorage<Value>(value);
deba@127
   658
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   659
      return *this;
deba@127
   660
    }
deba@127
   661
alpar@156
   662
    /// \brief Attribute reading rule
alpar@156
   663
    ///
alpar@156
   664
    /// Add an attribute reading rule with specialized converter to the
alpar@156
   665
    /// reader.
deba@127
   666
    template <typename Value, typename Converter>
alpar@209
   667
    DigraphReader& attribute(const std::string& caption, Value& value,
alpar@209
   668
                             const Converter& converter = Converter()) {
alpar@209
   669
      _reader_bits::ValueStorageBase* storage =
alpar@209
   670
        new _reader_bits::ValueStorage<Value, Converter>(value, converter);
deba@127
   671
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   672
      return *this;
deba@127
   673
    }
deba@127
   674
alpar@156
   675
    /// \brief Node reading rule
alpar@156
   676
    ///
alpar@156
   677
    /// Add a node reading rule to reader.
deba@127
   678
    DigraphReader& node(const std::string& caption, Node& node) {
deba@127
   679
      typedef _reader_bits::MapLookUpConverter<Node> Converter;
deba@127
   680
      Converter converter(_node_index);
alpar@209
   681
      _reader_bits::ValueStorageBase* storage =
alpar@209
   682
        new _reader_bits::ValueStorage<Node, Converter>(node, converter);
deba@127
   683
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   684
      return *this;
deba@127
   685
    }
deba@127
   686
alpar@156
   687
    /// \brief Arc reading rule
alpar@156
   688
    ///
alpar@156
   689
    /// Add an arc reading rule to reader.
deba@127
   690
    DigraphReader& arc(const std::string& caption, Arc& arc) {
deba@127
   691
      typedef _reader_bits::MapLookUpConverter<Arc> Converter;
deba@127
   692
      Converter converter(_arc_index);
alpar@209
   693
      _reader_bits::ValueStorageBase* storage =
alpar@209
   694
        new _reader_bits::ValueStorage<Arc, Converter>(arc, converter);
deba@127
   695
      _attributes.insert(std::make_pair(caption, storage));
deba@127
   696
      return *this;
deba@127
   697
    }
deba@127
   698
alpar@156
   699
    /// @}
alpar@156
   700
alpar@156
   701
    /// \name Select section by name
alpar@156
   702
    /// @{
alpar@156
   703
alpar@156
   704
    /// \brief Set \c \@nodes section to be read
alpar@156
   705
    ///
alpar@156
   706
    /// Set \c \@nodes section to be read
deba@127
   707
    DigraphReader& nodes(const std::string& caption) {
deba@127
   708
      _nodes_caption = caption;
deba@127
   709
      return *this;
deba@127
   710
    }
deba@127
   711
alpar@156
   712
    /// \brief Set \c \@arcs section to be read
alpar@156
   713
    ///
alpar@156
   714
    /// Set \c \@arcs section to be read
deba@127
   715
    DigraphReader& arcs(const std::string& caption) {
deba@127
   716
      _arcs_caption = caption;
deba@127
   717
      return *this;
deba@127
   718
    }
deba@127
   719
alpar@156
   720
    /// \brief Set \c \@attributes section to be read
alpar@156
   721
    ///
alpar@156
   722
    /// Set \c \@attributes section to be read
deba@127
   723
    DigraphReader& attributes(const std::string& caption) {
deba@127
   724
      _attributes_caption = caption;
deba@127
   725
      return *this;
deba@127
   726
    }
deba@127
   727
alpar@156
   728
    /// @}
alpar@156
   729
alpar@156
   730
    /// \name Using previously constructed node or arc set
alpar@156
   731
    /// @{
alpar@156
   732
alpar@156
   733
    /// \brief Use previously constructed node set
alpar@156
   734
    ///
alpar@156
   735
    /// Use previously constructed node set, and specify the node
alpar@156
   736
    /// label map.
deba@127
   737
    template <typename Map>
deba@127
   738
    DigraphReader& useNodes(const Map& map) {
deba@127
   739
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
   740
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member");
deba@127
   741
      _use_nodes = true;
deba@127
   742
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@127
   743
      for (NodeIt n(_digraph); n != INVALID; ++n) {
alpar@209
   744
        _node_index.insert(std::make_pair(converter(map[n]), n));
deba@127
   745
      }
deba@127
   746
      return *this;
deba@127
   747
    }
deba@127
   748
alpar@156
   749
    /// \brief Use previously constructed node set
alpar@156
   750
    ///
alpar@156
   751
    /// Use previously constructed node set, and specify the node
alpar@156
   752
    /// label map and a functor which converts the label map values to
kpeter@192
   753
    /// \c std::string.
deba@127
   754
    template <typename Map, typename Converter>
alpar@209
   755
    DigraphReader& useNodes(const Map& map,
alpar@209
   756
                            const Converter& converter = Converter()) {
deba@127
   757
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
   758
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member");
deba@127
   759
      _use_nodes = true;
deba@127
   760
      for (NodeIt n(_digraph); n != INVALID; ++n) {
alpar@209
   761
        _node_index.insert(std::make_pair(converter(map[n]), n));
deba@127
   762
      }
deba@127
   763
      return *this;
deba@127
   764
    }
deba@127
   765
alpar@156
   766
    /// \brief Use previously constructed arc set
alpar@156
   767
    ///
alpar@156
   768
    /// Use previously constructed arc set, and specify the arc
alpar@156
   769
    /// label map.
deba@127
   770
    template <typename Map>
deba@127
   771
    DigraphReader& useArcs(const Map& map) {
deba@127
   772
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
deba@127
   773
      LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member");
deba@127
   774
      _use_arcs = true;
deba@127
   775
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@127
   776
      for (ArcIt a(_digraph); a != INVALID; ++a) {
alpar@209
   777
        _arc_index.insert(std::make_pair(converter(map[a]), a));
deba@127
   778
      }
deba@127
   779
      return *this;
deba@127
   780
    }
deba@127
   781
alpar@156
   782
    /// \brief Use previously constructed arc set
alpar@156
   783
    ///
alpar@156
   784
    /// Use previously constructed arc set, and specify the arc
alpar@156
   785
    /// label map and a functor which converts the label map values to
kpeter@192
   786
    /// \c std::string.
deba@127
   787
    template <typename Map, typename Converter>
alpar@209
   788
    DigraphReader& useArcs(const Map& map,
alpar@209
   789
                           const Converter& converter = Converter()) {
deba@127
   790
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
alpar@209
   791
      LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member");
deba@127
   792
      _use_arcs = true;
deba@127
   793
      for (ArcIt a(_digraph); a != INVALID; ++a) {
alpar@209
   794
        _arc_index.insert(std::make_pair(converter(map[a]), a));
deba@127
   795
      }
deba@127
   796
      return *this;
deba@127
   797
    }
deba@127
   798
deba@188
   799
    /// \brief Skips the reading of node section
deba@188
   800
    ///
deba@188
   801
    /// Omit the reading of the node section. This implies that each node
kpeter@192
   802
    /// map reading rule will be abandoned, and the nodes of the graph
deba@188
   803
    /// will not be constructed, which usually cause that the arc set
kpeter@192
   804
    /// could not be read due to lack of node name resolving.
kpeter@192
   805
    /// Therefore \c skipArcs() function should also be used, or
kpeter@192
   806
    /// \c useNodes() should be used to specify the label of the nodes.
deba@188
   807
    DigraphReader& skipNodes() {
alpar@209
   808
      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set");
deba@188
   809
      _skip_nodes = true;
deba@188
   810
      return *this;
deba@188
   811
    }
deba@188
   812
deba@188
   813
    /// \brief Skips the reading of arc section
deba@188
   814
    ///
deba@188
   815
    /// Omit the reading of the arc section. This implies that each arc
kpeter@192
   816
    /// map reading rule will be abandoned, and the arcs of the graph
deba@188
   817
    /// will not be constructed.
deba@188
   818
    DigraphReader& skipArcs() {
alpar@209
   819
      LEMON_ASSERT(!_skip_arcs, "Skip arcs already set");
deba@188
   820
      _skip_arcs = true;
deba@188
   821
      return *this;
deba@188
   822
    }
deba@188
   823
alpar@156
   824
    /// @}
alpar@156
   825
deba@127
   826
  private:
deba@127
   827
deba@127
   828
    bool readLine() {
deba@127
   829
      std::string str;
deba@127
   830
      while(++line_num, std::getline(*_is, str)) {
alpar@209
   831
        line.clear(); line.str(str);
alpar@209
   832
        char c;
alpar@209
   833
        if (line >> std::ws >> c && c != '#') {
alpar@209
   834
          line.putback(c);
alpar@209
   835
          return true;
alpar@209
   836
        }
deba@127
   837
      }
deba@127
   838
      return false;
deba@127
   839
    }
deba@127
   840
deba@127
   841
    bool readSuccess() {
deba@127
   842
      return static_cast<bool>(*_is);
deba@127
   843
    }
alpar@209
   844
deba@127
   845
    void skipSection() {
deba@127
   846
      char c;
deba@127
   847
      while (readSuccess() && line >> c && c != '@') {
alpar@209
   848
        readLine();
deba@127
   849
      }
deba@427
   850
      if (readSuccess()) {
deba@427
   851
        line.putback(c);
deba@427
   852
      }
deba@127
   853
    }
deba@127
   854
deba@127
   855
    void readNodes() {
deba@127
   856
deba@127
   857
      std::vector<int> map_index(_node_maps.size());
deba@127
   858
      int map_num, label_index;
deba@127
   859
deba@186
   860
      char c;
deba@186
   861
      if (!readLine() || !(line >> c) || c == '@') {
alpar@209
   862
        if (readSuccess() && line) line.putback(c);
alpar@209
   863
        if (!_node_maps.empty())
deba@290
   864
          throw FormatError("Cannot find map names");
alpar@209
   865
        return;
deba@186
   866
      }
deba@186
   867
      line.putback(c);
deba@186
   868
deba@127
   869
      {
alpar@209
   870
        std::map<std::string, int> maps;
alpar@209
   871
alpar@209
   872
        std::string map;
alpar@209
   873
        int index = 0;
alpar@209
   874
        while (_reader_bits::readToken(line, map)) {
alpar@209
   875
          if (maps.find(map) != maps.end()) {
alpar@209
   876
            std::ostringstream msg;
alpar@209
   877
            msg << "Multiple occurence of node map: " << map;
deba@290
   878
            throw FormatError(msg.str());
alpar@209
   879
          }
alpar@209
   880
          maps.insert(std::make_pair(map, index));
alpar@209
   881
          ++index;
alpar@209
   882
        }
alpar@209
   883
alpar@209
   884
        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
alpar@209
   885
          std::map<std::string, int>::iterator jt =
alpar@209
   886
            maps.find(_node_maps[i].first);
alpar@209
   887
          if (jt == maps.end()) {
alpar@209
   888
            std::ostringstream msg;
kpeter@291
   889
            msg << "Map not found: " << _node_maps[i].first;
deba@290
   890
            throw FormatError(msg.str());
alpar@209
   891
          }
alpar@209
   892
          map_index[i] = jt->second;
alpar@209
   893
        }
alpar@209
   894
alpar@209
   895
        {
alpar@209
   896
          std::map<std::string, int>::iterator jt = maps.find("label");
alpar@209
   897
          if (jt != maps.end()) {
alpar@209
   898
            label_index = jt->second;
alpar@209
   899
          } else {
alpar@209
   900
            label_index = -1;
alpar@209
   901
          }
alpar@209
   902
        }
alpar@209
   903
        map_num = maps.size();
deba@127
   904
      }
deba@127
   905
deba@127
   906
      while (readLine() && line >> c && c != '@') {
alpar@209
   907
        line.putback(c);
alpar@209
   908
alpar@209
   909
        std::vector<std::string> tokens(map_num);
alpar@209
   910
        for (int i = 0; i < map_num; ++i) {
alpar@209
   911
          if (!_reader_bits::readToken(line, tokens[i])) {
alpar@209
   912
            std::ostringstream msg;
alpar@209
   913
            msg << "Column not found (" << i + 1 << ")";
deba@290
   914
            throw FormatError(msg.str());
alpar@209
   915
          }
alpar@209
   916
        }
alpar@209
   917
        if (line >> std::ws >> c)
kpeter@291
   918
          throw FormatError("Extra character at the end of line");
alpar@209
   919
alpar@209
   920
        Node n;
alpar@209
   921
        if (!_use_nodes) {
alpar@209
   922
          n = _digraph.addNode();
alpar@209
   923
          if (label_index != -1)
alpar@209
   924
            _node_index.insert(std::make_pair(tokens[label_index], n));
alpar@209
   925
        } else {
alpar@209
   926
          if (label_index == -1)
kpeter@291
   927
            throw FormatError("Label map not found");
alpar@209
   928
          typename std::map<std::string, Node>::iterator it =
alpar@209
   929
            _node_index.find(tokens[label_index]);
alpar@209
   930
          if (it == _node_index.end()) {
alpar@209
   931
            std::ostringstream msg;
alpar@209
   932
            msg << "Node with label not found: " << tokens[label_index];
deba@290
   933
            throw FormatError(msg.str());
alpar@209
   934
          }
alpar@209
   935
          n = it->second;
alpar@209
   936
        }
alpar@209
   937
alpar@209
   938
        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
alpar@209
   939
          _node_maps[i].second->set(n, tokens[map_index[i]]);
alpar@209
   940
        }
deba@127
   941
deba@127
   942
      }
deba@127
   943
      if (readSuccess()) {
alpar@209
   944
        line.putback(c);
deba@127
   945
      }
deba@127
   946
    }
deba@127
   947
deba@127
   948
    void readArcs() {
deba@127
   949
deba@127
   950
      std::vector<int> map_index(_arc_maps.size());
deba@127
   951
      int map_num, label_index;
deba@127
   952
deba@186
   953
      char c;
deba@186
   954
      if (!readLine() || !(line >> c) || c == '@') {
alpar@209
   955
        if (readSuccess() && line) line.putback(c);
alpar@209
   956
        if (!_arc_maps.empty())
deba@290
   957
          throw FormatError("Cannot find map names");
alpar@209
   958
        return;
deba@186
   959
      }
deba@186
   960
      line.putback(c);
alpar@209
   961
deba@127
   962
      {
alpar@209
   963
        std::map<std::string, int> maps;
alpar@209
   964
alpar@209
   965
        std::string map;
alpar@209
   966
        int index = 0;
alpar@209
   967
        while (_reader_bits::readToken(line, map)) {
alpar@209
   968
          if (maps.find(map) != maps.end()) {
alpar@209
   969
            std::ostringstream msg;
alpar@209
   970
            msg << "Multiple occurence of arc map: " << map;
deba@290
   971
            throw FormatError(msg.str());
alpar@209
   972
          }
alpar@209
   973
          maps.insert(std::make_pair(map, index));
alpar@209
   974
          ++index;
alpar@209
   975
        }
alpar@209
   976
alpar@209
   977
        for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) {
alpar@209
   978
          std::map<std::string, int>::iterator jt =
alpar@209
   979
            maps.find(_arc_maps[i].first);
alpar@209
   980
          if (jt == maps.end()) {
alpar@209
   981
            std::ostringstream msg;
kpeter@291
   982
            msg << "Map not found: " << _arc_maps[i].first;
deba@290
   983
            throw FormatError(msg.str());
alpar@209
   984
          }
alpar@209
   985
          map_index[i] = jt->second;
alpar@209
   986
        }
alpar@209
   987
alpar@209
   988
        {
alpar@209
   989
          std::map<std::string, int>::iterator jt = maps.find("label");
alpar@209
   990
          if (jt != maps.end()) {
alpar@209
   991
            label_index = jt->second;
alpar@209
   992
          } else {
alpar@209
   993
            label_index = -1;
alpar@209
   994
          }
alpar@209
   995
        }
alpar@209
   996
        map_num = maps.size();
deba@127
   997
      }
deba@127
   998
deba@127
   999
      while (readLine() && line >> c && c != '@') {
alpar@209
  1000
        line.putback(c);
alpar@209
  1001
alpar@209
  1002
        std::string source_token;
alpar@209
  1003
        std::string target_token;
alpar@209
  1004
alpar@209
  1005
        if (!_reader_bits::readToken(line, source_token))
deba@290
  1006
          throw FormatError("Source not found");
alpar@209
  1007
alpar@209
  1008
        if (!_reader_bits::readToken(line, target_token))
deba@290
  1009
          throw FormatError("Target not found");
alpar@209
  1010
alpar@209
  1011
        std::vector<std::string> tokens(map_num);
alpar@209
  1012
        for (int i = 0; i < map_num; ++i) {
alpar@209
  1013
          if (!_reader_bits::readToken(line, tokens[i])) {
alpar@209
  1014
            std::ostringstream msg;
alpar@209
  1015
            msg << "Column not found (" << i + 1 << ")";
deba@290
  1016
            throw FormatError(msg.str());
alpar@209
  1017
          }
alpar@209
  1018
        }
alpar@209
  1019
        if (line >> std::ws >> c)
kpeter@291
  1020
          throw FormatError("Extra character at the end of line");
alpar@209
  1021
alpar@209
  1022
        Arc a;
alpar@209
  1023
        if (!_use_arcs) {
deba@127
  1024
deba@127
  1025
          typename NodeIndex::iterator it;
alpar@209
  1026
deba@127
  1027
          it = _node_index.find(source_token);
deba@127
  1028
          if (it == _node_index.end()) {
deba@127
  1029
            std::ostringstream msg;
deba@127
  1030
            msg << "Item not found: " << source_token;
deba@290
  1031
            throw FormatError(msg.str());
deba@127
  1032
          }
deba@127
  1033
          Node source = it->second;
deba@127
  1034
deba@127
  1035
          it = _node_index.find(target_token);
alpar@209
  1036
          if (it == _node_index.end()) {
alpar@209
  1037
            std::ostringstream msg;
deba@127
  1038
            msg << "Item not found: " << target_token;
deba@290
  1039
            throw FormatError(msg.str());
alpar@209
  1040
          }
alpar@209
  1041
          Node target = it->second;
alpar@209
  1042
alpar@209
  1043
          a = _digraph.addArc(source, target);
alpar@209
  1044
          if (label_index != -1)
alpar@209
  1045
            _arc_index.insert(std::make_pair(tokens[label_index], a));
alpar@209
  1046
        } else {
alpar@209
  1047
          if (label_index == -1)
kpeter@291
  1048
            throw FormatError("Label map not found");
alpar@209
  1049
          typename std::map<std::string, Arc>::iterator it =
alpar@209
  1050
            _arc_index.find(tokens[label_index]);
alpar@209
  1051
          if (it == _arc_index.end()) {
alpar@209
  1052
            std::ostringstream msg;
alpar@209
  1053
            msg << "Arc with label not found: " << tokens[label_index];
deba@290
  1054
            throw FormatError(msg.str());
alpar@209
  1055
          }
alpar@209
  1056
          a = it->second;
alpar@209
  1057
        }
alpar@209
  1058
alpar@209
  1059
        for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) {
alpar@209
  1060
          _arc_maps[i].second->set(a, tokens[map_index[i]]);
alpar@209
  1061
        }
deba@127
  1062
deba@127
  1063
      }
deba@127
  1064
      if (readSuccess()) {
alpar@209
  1065
        line.putback(c);
deba@127
  1066
      }
deba@127
  1067
    }
deba@127
  1068
deba@127
  1069
    void readAttributes() {
deba@127
  1070
deba@127
  1071
      std::set<std::string> read_attr;
deba@127
  1072
deba@127
  1073
      char c;
deba@127
  1074
      while (readLine() && line >> c && c != '@') {
alpar@209
  1075
        line.putback(c);
alpar@209
  1076
alpar@209
  1077
        std::string attr, token;
alpar@209
  1078
        if (!_reader_bits::readToken(line, attr))
deba@290
  1079
          throw FormatError("Attribute name not found");
alpar@209
  1080
        if (!_reader_bits::readToken(line, token))
deba@290
  1081
          throw FormatError("Attribute value not found");
alpar@209
  1082
        if (line >> c)
kpeter@291
  1083
          throw FormatError("Extra character at the end of line");
alpar@209
  1084
alpar@209
  1085
        {
alpar@209
  1086
          std::set<std::string>::iterator it = read_attr.find(attr);
alpar@209
  1087
          if (it != read_attr.end()) {
alpar@209
  1088
            std::ostringstream msg;
kpeter@291
  1089
            msg << "Multiple occurence of attribute: " << attr;
deba@290
  1090
            throw FormatError(msg.str());
alpar@209
  1091
          }
alpar@209
  1092
          read_attr.insert(attr);
alpar@209
  1093
        }
alpar@209
  1094
alpar@209
  1095
        {
alpar@209
  1096
          typename Attributes::iterator it = _attributes.lower_bound(attr);
alpar@209
  1097
          while (it != _attributes.end() && it->first == attr) {
alpar@209
  1098
            it->second->set(token);
alpar@209
  1099
            ++it;
alpar@209
  1100
          }
alpar@209
  1101
        }
deba@127
  1102
deba@127
  1103
      }
deba@127
  1104
      if (readSuccess()) {
alpar@209
  1105
        line.putback(c);
deba@127
  1106
      }
deba@127
  1107
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
  1108
           it != _attributes.end(); ++it) {
alpar@209
  1109
        if (read_attr.find(it->first) == read_attr.end()) {
alpar@209
  1110
          std::ostringstream msg;
kpeter@291
  1111
          msg << "Attribute not found: " << it->first;
deba@290
  1112
          throw FormatError(msg.str());
alpar@209
  1113
        }
deba@127
  1114
      }
deba@127
  1115
    }
deba@127
  1116
deba@127
  1117
  public:
alpar@156
  1118
alpar@209
  1119
    /// \name Execution of the reader
alpar@156
  1120
    /// @{
alpar@156
  1121
alpar@156
  1122
    /// \brief Start the batch processing
alpar@156
  1123
    ///
alpar@156
  1124
    /// This function starts the batch processing
deba@127
  1125
    void run() {
deba@127
  1126
      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
alpar@209
  1127
deba@188
  1128
      bool nodes_done = _skip_nodes;
deba@188
  1129
      bool arcs_done = _skip_arcs;
deba@127
  1130
      bool attributes_done = false;
deba@127
  1131
alpar@209
  1132
      line_num = 0;
deba@127
  1133
      readLine();
deba@172
  1134
      skipSection();
deba@127
  1135
deba@127
  1136
      while (readSuccess()) {
alpar@209
  1137
        try {
alpar@209
  1138
          char c;
alpar@209
  1139
          std::string section, caption;
alpar@209
  1140
          line >> c;
alpar@209
  1141
          _reader_bits::readToken(line, section);
alpar@209
  1142
          _reader_bits::readToken(line, caption);
alpar@209
  1143
alpar@209
  1144
          if (line >> c)
kpeter@291
  1145
            throw FormatError("Extra character at the end of line");
alpar@209
  1146
alpar@209
  1147
          if (section == "nodes" && !nodes_done) {
alpar@209
  1148
            if (_nodes_caption.empty() || _nodes_caption == caption) {
alpar@209
  1149
              readNodes();
alpar@209
  1150
              nodes_done = true;
alpar@209
  1151
            }
alpar@209
  1152
          } else if ((section == "arcs" || section == "edges") &&
alpar@209
  1153
                     !arcs_done) {
alpar@209
  1154
            if (_arcs_caption.empty() || _arcs_caption == caption) {
alpar@209
  1155
              readArcs();
alpar@209
  1156
              arcs_done = true;
alpar@209
  1157
            }
alpar@209
  1158
          } else if (section == "attributes" && !attributes_done) {
alpar@209
  1159
            if (_attributes_caption.empty() || _attributes_caption == caption) {
alpar@209
  1160
              readAttributes();
alpar@209
  1161
              attributes_done = true;
alpar@209
  1162
            }
alpar@209
  1163
          } else {
alpar@209
  1164
            readLine();
alpar@209
  1165
            skipSection();
alpar@209
  1166
          }
deba@290
  1167
        } catch (FormatError& error) {
alpar@209
  1168
          error.line(line_num);
deba@290
  1169
          error.file(_filename);
alpar@209
  1170
          throw;
alpar@209
  1171
        }
deba@127
  1172
      }
deba@127
  1173
deba@127
  1174
      if (!nodes_done) {
deba@290
  1175
        throw FormatError("Section @nodes not found");
deba@127
  1176
      }
deba@127
  1177
deba@127
  1178
      if (!arcs_done) {
deba@290
  1179
        throw FormatError("Section @arcs not found");
deba@127
  1180
      }
deba@127
  1181
deba@127
  1182
      if (!attributes_done && !_attributes.empty()) {
deba@290
  1183
        throw FormatError("Section @attributes not found");
deba@127
  1184
      }
deba@127
  1185
deba@127
  1186
    }
alpar@156
  1187
alpar@156
  1188
    /// @}
alpar@209
  1189
deba@127
  1190
  };
deba@127
  1191
kpeter@487
  1192
  /// \brief Return a \ref DigraphReader class
kpeter@487
  1193
  ///
kpeter@487
  1194
  /// This function just returns a \ref DigraphReader class.
kpeter@487
  1195
  /// \relates DigraphReader
kpeter@487
  1196
  template <typename Digraph>
kpeter@487
  1197
  DigraphReader<Digraph> digraphReader(Digraph& digraph, std::istream& is) {
kpeter@487
  1198
    DigraphReader<Digraph> tmp(digraph, is);
kpeter@487
  1199
    return tmp;
kpeter@487
  1200
  }
kpeter@487
  1201
kpeter@487
  1202
  /// \brief Return a \ref DigraphReader class
kpeter@487
  1203
  ///
kpeter@487
  1204
  /// This function just returns a \ref DigraphReader class.
kpeter@487
  1205
  /// \relates DigraphReader
kpeter@487
  1206
  template <typename Digraph>
kpeter@487
  1207
  DigraphReader<Digraph> digraphReader(Digraph& digraph,
kpeter@487
  1208
                                       const std::string& fn) {
kpeter@487
  1209
    DigraphReader<Digraph> tmp(digraph, fn);
kpeter@487
  1210
    return tmp;
kpeter@487
  1211
  }
kpeter@487
  1212
kpeter@487
  1213
  /// \brief Return a \ref DigraphReader class
kpeter@487
  1214
  ///
kpeter@487
  1215
  /// This function just returns a \ref DigraphReader class.
kpeter@487
  1216
  /// \relates DigraphReader
kpeter@487
  1217
  template <typename Digraph>
kpeter@487
  1218
  DigraphReader<Digraph> digraphReader(Digraph& digraph, const char* fn) {
kpeter@487
  1219
    DigraphReader<Digraph> tmp(digraph, fn);
kpeter@487
  1220
    return tmp;
kpeter@487
  1221
  }
kpeter@487
  1222
ladanyi@303
  1223
  template <typename Graph>
ladanyi@303
  1224
  class GraphReader;
kpeter@487
  1225
 
ladanyi@303
  1226
  template <typename Graph>
kpeter@487
  1227
  GraphReader<Graph> graphReader(Graph& graph, 
kpeter@487
  1228
                                 std::istream& is = std::cin);
ladanyi@303
  1229
  template <typename Graph>
kpeter@487
  1230
  GraphReader<Graph> graphReader(Graph& graph, const std::string& fn);
ladanyi@303
  1231
  template <typename Graph>
kpeter@487
  1232
  GraphReader<Graph> graphReader(Graph& graph, const char *fn);
deba@165
  1233
deba@165
  1234
  /// \ingroup lemon_io
alpar@209
  1235
  ///
kpeter@192
  1236
  /// \brief \ref lgf-format "LGF" reader for undirected graphs
deba@165
  1237
  ///
deba@165
  1238
  /// This utility reads an \ref lgf-format "LGF" file.
kpeter@192
  1239
  ///
kpeter@192
  1240
  /// It can be used almost the same way as \c DigraphReader.
kpeter@192
  1241
  /// The only difference is that this class can handle edges and
kpeter@192
  1242
  /// edge maps as well as arcs and arc maps.
deba@201
  1243
  ///
deba@201
  1244
  /// The columns in the \c \@edges (or \c \@arcs) section are the
deba@201
  1245
  /// edge maps. However, if there are two maps with the same name
deba@201
  1246
  /// prefixed with \c '+' and \c '-', then these can be read into an
deba@201
  1247
  /// arc map.  Similarly, an attribute can be read into an arc, if
deba@201
  1248
  /// it's value is an edge label prefixed with \c '+' or \c '-'.
deba@165
  1249
  template <typename _Graph>
deba@165
  1250
  class GraphReader {
deba@165
  1251
  public:
deba@165
  1252
deba@165
  1253
    typedef _Graph Graph;
deba@165
  1254
    TEMPLATE_GRAPH_TYPEDEFS(Graph);
alpar@209
  1255
deba@165
  1256
  private:
deba@165
  1257
deba@165
  1258
    std::istream* _is;
deba@165
  1259
    bool local_is;
deba@290
  1260
    std::string _filename;
deba@165
  1261
deba@165
  1262
    Graph& _graph;
deba@165
  1263
deba@165
  1264
    std::string _nodes_caption;
deba@165
  1265
    std::string _edges_caption;
deba@165
  1266
    std::string _attributes_caption;
deba@165
  1267
deba@165
  1268
    typedef std::map<std::string, Node> NodeIndex;
deba@165
  1269
    NodeIndex _node_index;
deba@165
  1270
    typedef std::map<std::string, Edge> EdgeIndex;
deba@165
  1271
    EdgeIndex _edge_index;
alpar@209
  1272
alpar@209
  1273
    typedef std::vector<std::pair<std::string,
alpar@209
  1274
      _reader_bits::MapStorageBase<Node>*> > NodeMaps;
alpar@209
  1275
    NodeMaps _node_maps;
deba@165
  1276
deba@165
  1277
    typedef std::vector<std::pair<std::string,
deba@165
  1278
      _reader_bits::MapStorageBase<Edge>*> > EdgeMaps;
deba@165
  1279
    EdgeMaps _edge_maps;
deba@165
  1280
alpar@209
  1281
    typedef std::multimap<std::string, _reader_bits::ValueStorageBase*>
deba@165
  1282
      Attributes;
deba@165
  1283
    Attributes _attributes;
deba@165
  1284
deba@165
  1285
    bool _use_nodes;
deba@165
  1286
    bool _use_edges;
deba@165
  1287
deba@188
  1288
    bool _skip_nodes;
deba@188
  1289
    bool _skip_edges;
deba@188
  1290
deba@165
  1291
    int line_num;
deba@165
  1292
    std::istringstream line;
deba@165
  1293
deba@165
  1294
  public:
deba@165
  1295
deba@165
  1296
    /// \brief Constructor
deba@165
  1297
    ///
kpeter@192
  1298
    /// Construct an undirected graph reader, which reads from the given
deba@165
  1299
    /// input stream.
kpeter@293
  1300
    GraphReader(Graph& graph, std::istream& is = std::cin)
deba@165
  1301
      : _is(&is), local_is(false), _graph(graph),
alpar@209
  1302
        _use_nodes(false), _use_edges(false),
alpar@209
  1303
        _skip_nodes(false), _skip_edges(false) {}
deba@165
  1304
deba@165
  1305
    /// \brief Constructor
deba@165
  1306
    ///
kpeter@192
  1307
    /// Construct an undirected graph reader, which reads from the given
deba@165
  1308
    /// file.
kpeter@293
  1309
    GraphReader(Graph& graph, const std::string& fn)
deba@290
  1310
      : _is(new std::ifstream(fn.c_str())), local_is(true),
deba@290
  1311
        _filename(fn), _graph(graph),
kpeter@212
  1312
        _use_nodes(false), _use_edges(false),
deba@290
  1313
        _skip_nodes(false), _skip_edges(false) {
deba@295
  1314
      if (!(*_is)) {
deba@295
  1315
        delete _is;
deba@295
  1316
        throw IoError("Cannot open file", fn);
deba@295
  1317
      }
deba@290
  1318
    }
alpar@209
  1319
deba@165
  1320
    /// \brief Constructor
deba@165
  1321
    ///
kpeter@192
  1322
    /// Construct an undirected graph reader, which reads from the given
deba@165
  1323
    /// file.
kpeter@293
  1324
    GraphReader(Graph& graph, const char* fn)
deba@290
  1325
      : _is(new std::ifstream(fn)), local_is(true),
deba@290
  1326
        _filename(fn), _graph(graph),
kpeter@212
  1327
        _use_nodes(false), _use_edges(false),
deba@290
  1328
        _skip_nodes(false), _skip_edges(false) {
deba@295
  1329
      if (!(*_is)) {
deba@295
  1330
        delete _is;
deba@295
  1331
        throw IoError("Cannot open file", fn);
deba@295
  1332
      }
deba@290
  1333
    }
deba@165
  1334
deba@165
  1335
    /// \brief Destructor
deba@165
  1336
    ~GraphReader() {
alpar@209
  1337
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
  1338
           it != _node_maps.end(); ++it) {
alpar@209
  1339
        delete it->second;
deba@165
  1340
      }
deba@165
  1341
alpar@209
  1342
      for (typename EdgeMaps::iterator it = _edge_maps.begin();
alpar@209
  1343
           it != _edge_maps.end(); ++it) {
alpar@209
  1344
        delete it->second;
deba@165
  1345
      }
deba@165
  1346
alpar@209
  1347
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
  1348
           it != _attributes.end(); ++it) {
alpar@209
  1349
        delete it->second;
deba@165
  1350
      }
deba@165
  1351
deba@165
  1352
      if (local_is) {
alpar@209
  1353
        delete _is;
deba@165
  1354
      }
deba@165
  1355
deba@165
  1356
    }
deba@165
  1357
deba@165
  1358
  private:
kpeter@487
  1359
    template <typename GR>
kpeter@487
  1360
    friend GraphReader<GR> graphReader(GR& graph, std::istream& is);
kpeter@487
  1361
    template <typename GR>
kpeter@487
  1362
    friend GraphReader<GR> graphReader(GR& graph, const std::string& fn); 
kpeter@487
  1363
    template <typename GR>
kpeter@487
  1364
    friend GraphReader<GR> graphReader(GR& graph, const char *fn);
alpar@209
  1365
alpar@209
  1366
    GraphReader(GraphReader& other)
deba@190
  1367
      : _is(other._is), local_is(other.local_is), _graph(other._graph),
alpar@209
  1368
        _use_nodes(other._use_nodes), _use_edges(other._use_edges),
alpar@209
  1369
        _skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) {
deba@190
  1370
deba@190
  1371
      other._is = 0;
deba@190
  1372
      other.local_is = false;
alpar@209
  1373
deba@190
  1374
      _node_index.swap(other._node_index);
deba@190
  1375
      _edge_index.swap(other._edge_index);
deba@190
  1376
deba@190
  1377
      _node_maps.swap(other._node_maps);
deba@190
  1378
      _edge_maps.swap(other._edge_maps);
deba@190
  1379
      _attributes.swap(other._attributes);
deba@190
  1380
deba@190
  1381
      _nodes_caption = other._nodes_caption;
deba@190
  1382
      _edges_caption = other._edges_caption;
deba@190
  1383
      _attributes_caption = other._attributes_caption;
deba@190
  1384
deba@190
  1385
    }
deba@190
  1386
deba@165
  1387
    GraphReader& operator=(const GraphReader&);
deba@165
  1388
deba@165
  1389
  public:
deba@165
  1390
deba@165
  1391
    /// \name Reading rules
deba@165
  1392
    /// @{
alpar@209
  1393
deba@165
  1394
    /// \brief Node map reading rule
deba@165
  1395
    ///
deba@165
  1396
    /// Add a node map reading rule to the reader.
deba@165
  1397
    template <typename Map>
deba@165
  1398
    GraphReader& nodeMap(const std::string& caption, Map& map) {
deba@165
  1399
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
alpar@209
  1400
      _reader_bits::MapStorageBase<Node>* storage =
alpar@209
  1401
        new _reader_bits::MapStorage<Node, Map>(map);
deba@165
  1402
      _node_maps.push_back(std::make_pair(caption, storage));
deba@165
  1403
      return *this;
deba@165
  1404
    }
deba@165
  1405
deba@165
  1406
    /// \brief Node map reading rule
deba@165
  1407
    ///
deba@165
  1408
    /// Add a node map reading rule with specialized converter to the
deba@165
  1409
    /// reader.
deba@165
  1410
    template <typename Map, typename Converter>
alpar@209
  1411
    GraphReader& nodeMap(const std::string& caption, Map& map,
alpar@209
  1412
                           const Converter& converter = Converter()) {
deba@165
  1413
      checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>();
alpar@209
  1414
      _reader_bits::MapStorageBase<Node>* storage =
alpar@209
  1415
        new _reader_bits::MapStorage<Node, Map, Converter>(map, converter);
deba@165
  1416
      _node_maps.push_back(std::make_pair(caption, storage));
deba@165
  1417
      return *this;
deba@165
  1418
    }
deba@165
  1419
deba@165
  1420
    /// \brief Edge map reading rule
deba@165
  1421
    ///
deba@165
  1422
    /// Add an edge map reading rule to the reader.
deba@165
  1423
    template <typename Map>
deba@165
  1424
    GraphReader& edgeMap(const std::string& caption, Map& map) {
deba@165
  1425
      checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>();
alpar@209
  1426
      _reader_bits::MapStorageBase<Edge>* storage =
alpar@209
  1427
        new _reader_bits::MapStorage<Edge, Map>(map);
deba@165
  1428
      _edge_maps.push_back(std::make_pair(caption, storage));
deba@165
  1429
      return *this;
deba@165
  1430
    }
deba@165
  1431
deba@165
  1432
    /// \brief Edge map reading rule
deba@165
  1433
    ///
deba@165
  1434
    /// Add an edge map reading rule with specialized converter to the
deba@165
  1435
    /// reader.
deba@165
  1436
    template <typename Map, typename Converter>
alpar@209
  1437
    GraphReader& edgeMap(const std::string& caption, Map& map,
alpar@209
  1438
                          const Converter& converter = Converter()) {
deba@165
  1439
      checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>();
alpar@209
  1440
      _reader_bits::MapStorageBase<Edge>* storage =
alpar@209
  1441
        new _reader_bits::MapStorage<Edge, Map, Converter>(map, converter);
deba@165
  1442
      _edge_maps.push_back(std::make_pair(caption, storage));
deba@165
  1443
      return *this;
deba@165
  1444
    }
deba@165
  1445
deba@165
  1446
    /// \brief Arc map reading rule
deba@165
  1447
    ///
deba@165
  1448
    /// Add an arc map reading rule to the reader.
deba@165
  1449
    template <typename Map>
deba@165
  1450
    GraphReader& arcMap(const std::string& caption, Map& map) {
deba@165
  1451
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
alpar@209
  1452
      _reader_bits::MapStorageBase<Edge>* forward_storage =
alpar@209
  1453
        new _reader_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map);
deba@165
  1454
      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
alpar@209
  1455
      _reader_bits::MapStorageBase<Edge>* backward_storage =
alpar@209
  1456
        new _reader_bits::GraphArcMapStorage<Graph, false, Map>(_graph, map);
deba@165
  1457
      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
deba@165
  1458
      return *this;
deba@165
  1459
    }
deba@165
  1460
deba@165
  1461
    /// \brief Arc map reading rule
deba@165
  1462
    ///
deba@165
  1463
    /// Add an arc map reading rule with specialized converter to the
deba@165
  1464
    /// reader.
deba@165
  1465
    template <typename Map, typename Converter>
alpar@209
  1466
    GraphReader& arcMap(const std::string& caption, Map& map,
alpar@209
  1467
                          const Converter& converter = Converter()) {
deba@165
  1468
      checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>();
alpar@209
  1469
      _reader_bits::MapStorageBase<Edge>* forward_storage =
alpar@209
  1470
        new _reader_bits::GraphArcMapStorage<Graph, true, Map, Converter>
alpar@209
  1471
        (_graph, map, converter);
deba@165
  1472
      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
alpar@209
  1473
      _reader_bits::MapStorageBase<Edge>* backward_storage =
alpar@209
  1474
        new _reader_bits::GraphArcMapStorage<Graph, false, Map, Converter>
alpar@209
  1475
        (_graph, map, converter);
deba@165
  1476
      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
deba@165
  1477
      return *this;
deba@165
  1478
    }
deba@165
  1479
deba@165
  1480
    /// \brief Attribute reading rule
deba@165
  1481
    ///
deba@165
  1482
    /// Add an attribute reading rule to the reader.
deba@165
  1483
    template <typename Value>
deba@165
  1484
    GraphReader& attribute(const std::string& caption, Value& value) {
alpar@209
  1485
      _reader_bits::ValueStorageBase* storage =
alpar@209
  1486
        new _reader_bits::ValueStorage<Value>(value);
deba@165
  1487
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1488
      return *this;
deba@165
  1489
    }
deba@165
  1490
deba@165
  1491
    /// \brief Attribute reading rule
deba@165
  1492
    ///
deba@165
  1493
    /// Add an attribute reading rule with specialized converter to the
deba@165
  1494
    /// reader.
deba@165
  1495
    template <typename Value, typename Converter>
alpar@209
  1496
    GraphReader& attribute(const std::string& caption, Value& value,
alpar@209
  1497
                             const Converter& converter = Converter()) {
alpar@209
  1498
      _reader_bits::ValueStorageBase* storage =
alpar@209
  1499
        new _reader_bits::ValueStorage<Value, Converter>(value, converter);
deba@165
  1500
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1501
      return *this;
deba@165
  1502
    }
deba@165
  1503
deba@165
  1504
    /// \brief Node reading rule
deba@165
  1505
    ///
deba@165
  1506
    /// Add a node reading rule to reader.
deba@165
  1507
    GraphReader& node(const std::string& caption, Node& node) {
deba@165
  1508
      typedef _reader_bits::MapLookUpConverter<Node> Converter;
deba@165
  1509
      Converter converter(_node_index);
alpar@209
  1510
      _reader_bits::ValueStorageBase* storage =
alpar@209
  1511
        new _reader_bits::ValueStorage<Node, Converter>(node, converter);
deba@165
  1512
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1513
      return *this;
deba@165
  1514
    }
deba@165
  1515
deba@165
  1516
    /// \brief Edge reading rule
deba@165
  1517
    ///
deba@165
  1518
    /// Add an edge reading rule to reader.
deba@165
  1519
    GraphReader& edge(const std::string& caption, Edge& edge) {
deba@165
  1520
      typedef _reader_bits::MapLookUpConverter<Edge> Converter;
deba@165
  1521
      Converter converter(_edge_index);
alpar@209
  1522
      _reader_bits::ValueStorageBase* storage =
alpar@209
  1523
        new _reader_bits::ValueStorage<Edge, Converter>(edge, converter);
deba@165
  1524
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1525
      return *this;
deba@165
  1526
    }
deba@165
  1527
deba@165
  1528
    /// \brief Arc reading rule
deba@165
  1529
    ///
deba@165
  1530
    /// Add an arc reading rule to reader.
deba@165
  1531
    GraphReader& arc(const std::string& caption, Arc& arc) {
deba@165
  1532
      typedef _reader_bits::GraphArcLookUpConverter<Graph> Converter;
deba@165
  1533
      Converter converter(_graph, _edge_index);
alpar@209
  1534
      _reader_bits::ValueStorageBase* storage =
alpar@209
  1535
        new _reader_bits::ValueStorage<Arc, Converter>(arc, converter);
deba@165
  1536
      _attributes.insert(std::make_pair(caption, storage));
deba@165
  1537
      return *this;
deba@165
  1538
    }
deba@165
  1539
deba@165
  1540
    /// @}
deba@165
  1541
deba@165
  1542
    /// \name Select section by name
deba@165
  1543
    /// @{
deba@165
  1544
deba@165
  1545
    /// \brief Set \c \@nodes section to be read
deba@165
  1546
    ///
kpeter@192
  1547
    /// Set \c \@nodes section to be read.
deba@165
  1548
    GraphReader& nodes(const std::string& caption) {
deba@165
  1549
      _nodes_caption = caption;
deba@165
  1550
      return *this;
deba@165
  1551
    }
deba@165
  1552
deba@165
  1553
    /// \brief Set \c \@edges section to be read
deba@165
  1554
    ///
kpeter@192
  1555
    /// Set \c \@edges section to be read.
deba@165
  1556
    GraphReader& edges(const std::string& caption) {
deba@165
  1557
      _edges_caption = caption;
deba@165
  1558
      return *this;
deba@165
  1559
    }
deba@165
  1560
deba@165
  1561
    /// \brief Set \c \@attributes section to be read
deba@165
  1562
    ///
kpeter@192
  1563
    /// Set \c \@attributes section to be read.
deba@165
  1564
    GraphReader& attributes(const std::string& caption) {
deba@165
  1565
      _attributes_caption = caption;
deba@165
  1566
      return *this;
deba@165
  1567
    }
deba@165
  1568
deba@165
  1569
    /// @}
deba@165
  1570
deba@165
  1571
    /// \name Using previously constructed node or edge set
deba@165
  1572
    /// @{
deba@165
  1573
deba@165
  1574
    /// \brief Use previously constructed node set
deba@165
  1575
    ///
deba@165
  1576
    /// Use previously constructed node set, and specify the node
deba@165
  1577
    /// label map.
deba@165
  1578
    template <typename Map>
deba@165
  1579
    GraphReader& useNodes(const Map& map) {
deba@165
  1580
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
  1581
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member");
deba@165
  1582
      _use_nodes = true;
deba@165
  1583
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@165
  1584
      for (NodeIt n(_graph); n != INVALID; ++n) {
alpar@209
  1585
        _node_index.insert(std::make_pair(converter(map[n]), n));
deba@165
  1586
      }
deba@165
  1587
      return *this;
deba@165
  1588
    }
deba@165
  1589
deba@165
  1590
    /// \brief Use previously constructed node set
deba@165
  1591
    ///
deba@165
  1592
    /// Use previously constructed node set, and specify the node
deba@165
  1593
    /// label map and a functor which converts the label map values to
kpeter@192
  1594
    /// \c std::string.
deba@165
  1595
    template <typename Map, typename Converter>
alpar@209
  1596
    GraphReader& useNodes(const Map& map,
alpar@209
  1597
                            const Converter& converter = Converter()) {
deba@165
  1598
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
  1599
      LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member");
deba@165
  1600
      _use_nodes = true;
deba@165
  1601
      for (NodeIt n(_graph); n != INVALID; ++n) {
alpar@209
  1602
        _node_index.insert(std::make_pair(converter(map[n]), n));
deba@165
  1603
      }
deba@165
  1604
      return *this;
deba@165
  1605
    }
deba@165
  1606
deba@165
  1607
    /// \brief Use previously constructed edge set
deba@165
  1608
    ///
deba@165
  1609
    /// Use previously constructed edge set, and specify the edge
deba@165
  1610
    /// label map.
deba@165
  1611
    template <typename Map>
deba@165
  1612
    GraphReader& useEdges(const Map& map) {
deba@165
  1613
      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
deba@165
  1614
      LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member");
deba@165
  1615
      _use_edges = true;
deba@165
  1616
      _writer_bits::DefaultConverter<typename Map::Value> converter;
deba@165
  1617
      for (EdgeIt a(_graph); a != INVALID; ++a) {
alpar@209
  1618
        _edge_index.insert(std::make_pair(converter(map[a]), a));
deba@165
  1619
      }
deba@165
  1620
      return *this;
deba@165
  1621
    }
deba@165
  1622
deba@165
  1623
    /// \brief Use previously constructed edge set
deba@165
  1624
    ///
deba@165
  1625
    /// Use previously constructed edge set, and specify the edge
deba@165
  1626
    /// label map and a functor which converts the label map values to
kpeter@192
  1627
    /// \c std::string.
deba@165
  1628
    template <typename Map, typename Converter>
alpar@209
  1629
    GraphReader& useEdges(const Map& map,
alpar@209
  1630
                            const Converter& converter = Converter()) {
deba@165
  1631
      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
alpar@209
  1632
      LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member");
deba@165
  1633
      _use_edges = true;
deba@165
  1634
      for (EdgeIt a(_graph); a != INVALID; ++a) {
alpar@209
  1635
        _edge_index.insert(std::make_pair(converter(map[a]), a));
deba@165
  1636
      }
deba@165
  1637
      return *this;
deba@165
  1638
    }
deba@165
  1639
kpeter@192
  1640
    /// \brief Skip the reading of node section
deba@188
  1641
    ///
deba@188
  1642
    /// Omit the reading of the node section. This implies that each node
kpeter@192
  1643
    /// map reading rule will be abandoned, and the nodes of the graph
deba@188
  1644
    /// will not be constructed, which usually cause that the edge set
deba@188
  1645
    /// could not be read due to lack of node name
kpeter@192
  1646
    /// could not be read due to lack of node name resolving.
kpeter@192
  1647
    /// Therefore \c skipEdges() function should also be used, or
kpeter@192
  1648
    /// \c useNodes() should be used to specify the label of the nodes.
deba@188
  1649
    GraphReader& skipNodes() {
alpar@209
  1650
      LEMON_ASSERT(!_skip_nodes, "Skip nodes already set");
deba@188
  1651
      _skip_nodes = true;
deba@188
  1652
      return *this;
deba@188
  1653
    }
deba@188
  1654
kpeter@192
  1655
    /// \brief Skip the reading of edge section
deba@188
  1656
    ///
deba@188
  1657
    /// Omit the reading of the edge section. This implies that each edge
kpeter@192
  1658
    /// map reading rule will be abandoned, and the edges of the graph
deba@188
  1659
    /// will not be constructed.
deba@188
  1660
    GraphReader& skipEdges() {
alpar@209
  1661
      LEMON_ASSERT(!_skip_edges, "Skip edges already set");
deba@188
  1662
      _skip_edges = true;
deba@188
  1663
      return *this;
deba@188
  1664
    }
deba@188
  1665
deba@165
  1666
    /// @}
deba@165
  1667
deba@165
  1668
  private:
deba@165
  1669
deba@165
  1670
    bool readLine() {
deba@165
  1671
      std::string str;
deba@165
  1672
      while(++line_num, std::getline(*_is, str)) {
alpar@209
  1673
        line.clear(); line.str(str);
alpar@209
  1674
        char c;
alpar@209
  1675
        if (line >> std::ws >> c && c != '#') {
alpar@209
  1676
          line.putback(c);
alpar@209
  1677
          return true;
alpar@209
  1678
        }
deba@165
  1679
      }
deba@165
  1680
      return false;
deba@165
  1681
    }
deba@165
  1682
deba@165
  1683
    bool readSuccess() {
deba@165
  1684
      return static_cast<bool>(*_is);
deba@165
  1685
    }
alpar@209
  1686
deba@165
  1687
    void skipSection() {
deba@165
  1688
      char c;
deba@165
  1689
      while (readSuccess() && line >> c && c != '@') {
alpar@209
  1690
        readLine();
deba@165
  1691
      }
deba@427
  1692
      if (readSuccess()) {
deba@427
  1693
        line.putback(c);
deba@427
  1694
      }
deba@165
  1695
    }
deba@165
  1696
deba@165
  1697
    void readNodes() {
deba@165
  1698
deba@165
  1699
      std::vector<int> map_index(_node_maps.size());
deba@165
  1700
      int map_num, label_index;
deba@165
  1701
deba@186
  1702
      char c;
deba@186
  1703
      if (!readLine() || !(line >> c) || c == '@') {
alpar@209
  1704
        if (readSuccess() && line) line.putback(c);
alpar@209
  1705
        if (!_node_maps.empty())
deba@290
  1706
          throw FormatError("Cannot find map names");
alpar@209
  1707
        return;
deba@186
  1708
      }
deba@186
  1709
      line.putback(c);
alpar@209
  1710
deba@165
  1711
      {
alpar@209
  1712
        std::map<std::string, int> maps;
alpar@209
  1713
alpar@209
  1714
        std::string map;
alpar@209
  1715
        int index = 0;
alpar@209
  1716
        while (_reader_bits::readToken(line, map)) {
alpar@209
  1717
          if (maps.find(map) != maps.end()) {
alpar@209
  1718
            std::ostringstream msg;
alpar@209
  1719
            msg << "Multiple occurence of node map: " << map;
deba@290
  1720
            throw FormatError(msg.str());
alpar@209
  1721
          }
alpar@209
  1722
          maps.insert(std::make_pair(map, index));
alpar@209
  1723
          ++index;
alpar@209
  1724
        }
alpar@209
  1725
alpar@209
  1726
        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
alpar@209
  1727
          std::map<std::string, int>::iterator jt =
alpar@209
  1728
            maps.find(_node_maps[i].first);
alpar@209
  1729
          if (jt == maps.end()) {
alpar@209
  1730
            std::ostringstream msg;
kpeter@291
  1731
            msg << "Map not found: " << _node_maps[i].first;
deba@290
  1732
            throw FormatError(msg.str());
alpar@209
  1733
          }
alpar@209
  1734
          map_index[i] = jt->second;
alpar@209
  1735
        }
alpar@209
  1736
alpar@209
  1737
        {
alpar@209
  1738
          std::map<std::string, int>::iterator jt = maps.find("label");
alpar@209
  1739
          if (jt != maps.end()) {
alpar@209
  1740
            label_index = jt->second;
alpar@209
  1741
          } else {
alpar@209
  1742
            label_index = -1;
alpar@209
  1743
          }
alpar@209
  1744
        }
alpar@209
  1745
        map_num = maps.size();
deba@165
  1746
      }
deba@165
  1747
deba@165
  1748
      while (readLine() && line >> c && c != '@') {
alpar@209
  1749
        line.putback(c);
alpar@209
  1750
alpar@209
  1751
        std::vector<std::string> tokens(map_num);
alpar@209
  1752
        for (int i = 0; i < map_num; ++i) {
alpar@209
  1753
          if (!_reader_bits::readToken(line, tokens[i])) {
alpar@209
  1754
            std::ostringstream msg;
alpar@209
  1755
            msg << "Column not found (" << i + 1 << ")";
deba@290
  1756
            throw FormatError(msg.str());
alpar@209
  1757
          }
alpar@209
  1758
        }
alpar@209
  1759
        if (line >> std::ws >> c)
kpeter@291
  1760
          throw FormatError("Extra character at the end of line");
alpar@209
  1761
alpar@209
  1762
        Node n;
alpar@209
  1763
        if (!_use_nodes) {
alpar@209
  1764
          n = _graph.addNode();
alpar@209
  1765
          if (label_index != -1)
alpar@209
  1766
            _node_index.insert(std::make_pair(tokens[label_index], n));
alpar@209
  1767
        } else {
alpar@209
  1768
          if (label_index == -1)
kpeter@291
  1769
            throw FormatError("Label map not found");
alpar@209
  1770
          typename std::map<std::string, Node>::iterator it =
alpar@209
  1771
            _node_index.find(tokens[label_index]);
alpar@209
  1772
          if (it == _node_index.end()) {
alpar@209
  1773
            std::ostringstream msg;
alpar@209
  1774
            msg << "Node with label not found: " << tokens[label_index];
deba@290
  1775
            throw FormatError(msg.str());
alpar@209
  1776
          }
alpar@209
  1777
          n = it->second;
alpar@209
  1778
        }
alpar@209
  1779
alpar@209
  1780
        for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) {
alpar@209
  1781
          _node_maps[i].second->set(n, tokens[map_index[i]]);
alpar@209
  1782
        }
deba@165
  1783
deba@165
  1784
      }
deba@165
  1785
      if (readSuccess()) {
alpar@209
  1786
        line.putback(c);
deba@165
  1787
      }
deba@165
  1788
    }
deba@165
  1789
deba@165
  1790
    void readEdges() {
deba@165
  1791
deba@165
  1792
      std::vector<int> map_index(_edge_maps.size());
deba@165
  1793
      int map_num, label_index;
deba@165
  1794
deba@186
  1795
      char c;
deba@186
  1796
      if (!readLine() || !(line >> c) || c == '@') {
alpar@209
  1797
        if (readSuccess() && line) line.putback(c);
alpar@209
  1798
        if (!_edge_maps.empty())
deba@290
  1799
          throw FormatError("Cannot find map names");
alpar@209
  1800
        return;
deba@186
  1801
      }
deba@186
  1802
      line.putback(c);
alpar@209
  1803
deba@165
  1804
      {
alpar@209
  1805
        std::map<std::string, int> maps;
alpar@209
  1806
alpar@209
  1807
        std::string map;
alpar@209
  1808
        int index = 0;
alpar@209
  1809
        while (_reader_bits::readToken(line, map)) {
alpar@209
  1810
          if (maps.find(map) != maps.end()) {
alpar@209
  1811
            std::ostringstream msg;
alpar@209
  1812
            msg << "Multiple occurence of edge map: " << map;
deba@290
  1813
            throw FormatError(msg.str());
alpar@209
  1814
          }
alpar@209
  1815
          maps.insert(std::make_pair(map, index));
alpar@209
  1816
          ++index;
alpar@209
  1817
        }
alpar@209
  1818
alpar@209
  1819
        for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) {
alpar@209
  1820
          std::map<std::string, int>::iterator jt =
alpar@209
  1821
            maps.find(_edge_maps[i].first);
alpar@209
  1822
          if (jt == maps.end()) {
alpar@209
  1823
            std::ostringstream msg;
kpeter@291
  1824
            msg << "Map not found: " << _edge_maps[i].first;
deba@290
  1825
            throw FormatError(msg.str());
alpar@209
  1826
          }
alpar@209
  1827
          map_index[i] = jt->second;
alpar@209
  1828
        }
alpar@209
  1829
alpar@209
  1830
        {
alpar@209
  1831
          std::map<std::string, int>::iterator jt = maps.find("label");
alpar@209
  1832
          if (jt != maps.end()) {
alpar@209
  1833
            label_index = jt->second;
alpar@209
  1834
          } else {
alpar@209
  1835
            label_index = -1;
alpar@209
  1836
          }
alpar@209
  1837
        }
alpar@209
  1838
        map_num = maps.size();
deba@165
  1839
      }
deba@165
  1840
deba@165
  1841
      while (readLine() && line >> c && c != '@') {
alpar@209
  1842
        line.putback(c);
alpar@209
  1843
alpar@209
  1844
        std::string source_token;
alpar@209
  1845
        std::string target_token;
alpar@209
  1846
alpar@209
  1847
        if (!_reader_bits::readToken(line, source_token))
deba@290
  1848
          throw FormatError("Node u not found");
alpar@209
  1849
alpar@209
  1850
        if (!_reader_bits::readToken(line, target_token))
deba@290
  1851
          throw FormatError("Node v not found");
alpar@209
  1852
alpar@209
  1853
        std::vector<std::string> tokens(map_num);
alpar@209
  1854
        for (int i = 0; i < map_num; ++i) {
alpar@209
  1855
          if (!_reader_bits::readToken(line, tokens[i])) {
alpar@209
  1856
            std::ostringstream msg;
alpar@209
  1857
            msg << "Column not found (" << i + 1 << ")";
deba@290
  1858
            throw FormatError(msg.str());
alpar@209
  1859
          }
alpar@209
  1860
        }
alpar@209
  1861
        if (line >> std::ws >> c)
kpeter@291
  1862
          throw FormatError("Extra character at the end of line");
alpar@209
  1863
alpar@209
  1864
        Edge e;
alpar@209
  1865
        if (!_use_edges) {
deba@165
  1866
deba@165
  1867
          typename NodeIndex::iterator it;
alpar@209
  1868
deba@165
  1869
          it = _node_index.find(source_token);
deba@165
  1870
          if (it == _node_index.end()) {
deba@165
  1871
            std::ostringstream msg;
deba@165
  1872
            msg << "Item not found: " << source_token;
deba@290
  1873
            throw FormatError(msg.str());
deba@165
  1874
          }
deba@165
  1875
          Node source = it->second;
deba@165
  1876
deba@165
  1877
          it = _node_index.find(target_token);
alpar@209
  1878
          if (it == _node_index.end()) {
alpar@209
  1879
            std::ostringstream msg;
deba@165
  1880
            msg << "Item not found: " << target_token;
deba@290
  1881
            throw FormatError(msg.str());
alpar@209
  1882
          }
alpar@209
  1883
          Node target = it->second;
alpar@209
  1884
alpar@209
  1885
          e = _graph.addEdge(source, target);
alpar@209
  1886
          if (label_index != -1)
alpar@209
  1887
            _edge_index.insert(std::make_pair(tokens[label_index], e));
alpar@209
  1888
        } else {
alpar@209
  1889
          if (label_index == -1)
kpeter@291
  1890
            throw FormatError("Label map not found");
alpar@209
  1891
          typename std::map<std::string, Edge>::iterator it =
alpar@209
  1892
            _edge_index.find(tokens[label_index]);
alpar@209
  1893
          if (it == _edge_index.end()) {
alpar@209
  1894
            std::ostringstream msg;
alpar@209
  1895
            msg << "Edge with label not found: " << tokens[label_index];
deba@290
  1896
            throw FormatError(msg.str());
alpar@209
  1897
          }
alpar@209
  1898
          e = it->second;
alpar@209
  1899
        }
alpar@209
  1900
alpar@209
  1901
        for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) {
alpar@209
  1902
          _edge_maps[i].second->set(e, tokens[map_index[i]]);
alpar@209
  1903
        }
deba@165
  1904
deba@165
  1905
      }
deba@165
  1906
      if (readSuccess()) {
alpar@209
  1907
        line.putback(c);
deba@165
  1908
      }
deba@165
  1909
    }
deba@165
  1910
deba@165
  1911
    void readAttributes() {
deba@165
  1912
deba@165
  1913
      std::set<std::string> read_attr;
deba@165
  1914
deba@165
  1915
      char c;
deba@165
  1916
      while (readLine() && line >> c && c != '@') {
alpar@209
  1917
        line.putback(c);
alpar@209
  1918
alpar@209
  1919
        std::string attr, token;
alpar@209
  1920
        if (!_reader_bits::readToken(line, attr))
deba@290
  1921
          throw FormatError("Attribute name not found");
alpar@209
  1922
        if (!_reader_bits::readToken(line, token))
deba@290
  1923
          throw FormatError("Attribute value not found");
alpar@209
  1924
        if (line >> c)
kpeter@291
  1925
          throw FormatError("Extra character at the end of line");
alpar@209
  1926
alpar@209
  1927
        {
alpar@209
  1928
          std::set<std::string>::iterator it = read_attr.find(attr);
alpar@209
  1929
          if (it != read_attr.end()) {
alpar@209
  1930
            std::ostringstream msg;
kpeter@291
  1931
            msg << "Multiple occurence of attribute: " << attr;
deba@290
  1932
            throw FormatError(msg.str());
alpar@209
  1933
          }
alpar@209
  1934
          read_attr.insert(attr);
alpar@209
  1935
        }
alpar@209
  1936
alpar@209
  1937
        {
alpar@209
  1938
          typename Attributes::iterator it = _attributes.lower_bound(attr);
alpar@209
  1939
          while (it != _attributes.end() && it->first == attr) {
alpar@209
  1940
            it->second->set(token);
alpar@209
  1941
            ++it;
alpar@209
  1942
          }
alpar@209
  1943
        }
deba@165
  1944
deba@165
  1945
      }
deba@165
  1946
      if (readSuccess()) {
alpar@209
  1947
        line.putback(c);
deba@165
  1948
      }
deba@165
  1949
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
  1950
           it != _attributes.end(); ++it) {
alpar@209
  1951
        if (read_attr.find(it->first) == read_attr.end()) {
alpar@209
  1952
          std::ostringstream msg;
kpeter@291
  1953
          msg << "Attribute not found: " << it->first;
deba@290
  1954
          throw FormatError(msg.str());
alpar@209
  1955
        }
deba@165
  1956
      }
deba@165
  1957
    }
deba@165
  1958
deba@165
  1959
  public:
deba@165
  1960
alpar@209
  1961
    /// \name Execution of the reader
deba@165
  1962
    /// @{
deba@165
  1963
deba@165
  1964
    /// \brief Start the batch processing
deba@165
  1965
    ///
deba@165
  1966
    /// This function starts the batch processing
deba@165
  1967
    void run() {
alpar@209
  1968
deba@165
  1969
      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
alpar@209
  1970
deba@188
  1971
      bool nodes_done = _skip_nodes;
deba@188
  1972
      bool edges_done = _skip_edges;
deba@165
  1973
      bool attributes_done = false;
deba@165
  1974
alpar@209
  1975
      line_num = 0;
deba@165
  1976
      readLine();
deba@172
  1977
      skipSection();
deba@165
  1978
deba@165
  1979
      while (readSuccess()) {
alpar@209
  1980
        try {
alpar@209
  1981
          char c;
alpar@209
  1982
          std::string section, caption;
alpar@209
  1983
          line >> c;
alpar@209
  1984
          _reader_bits::readToken(line, section);
alpar@209
  1985
          _reader_bits::readToken(line, caption);
alpar@209
  1986
alpar@209
  1987
          if (line >> c)
kpeter@291
  1988
            throw FormatError("Extra character at the end of line");
alpar@209
  1989
alpar@209
  1990
          if (section == "nodes" && !nodes_done) {
alpar@209
  1991
            if (_nodes_caption.empty() || _nodes_caption == caption) {
alpar@209
  1992
              readNodes();
alpar@209
  1993
              nodes_done = true;
alpar@209
  1994
            }
alpar@209
  1995
          } else if ((section == "edges" || section == "arcs") &&
alpar@209
  1996
                     !edges_done) {
alpar@209
  1997
            if (_edges_caption.empty() || _edges_caption == caption) {
alpar@209
  1998
              readEdges();
alpar@209
  1999
              edges_done = true;
alpar@209
  2000
            }
alpar@209
  2001
          } else if (section == "attributes" && !attributes_done) {
alpar@209
  2002
            if (_attributes_caption.empty() || _attributes_caption == caption) {
alpar@209
  2003
              readAttributes();
alpar@209
  2004
              attributes_done = true;
alpar@209
  2005
            }
alpar@209
  2006
          } else {
alpar@209
  2007
            readLine();
alpar@209
  2008
            skipSection();
alpar@209
  2009
          }
deba@290
  2010
        } catch (FormatError& error) {
alpar@209
  2011
          error.line(line_num);
deba@290
  2012
          error.file(_filename);
alpar@209
  2013
          throw;
alpar@209
  2014
        }
deba@165
  2015
      }
deba@165
  2016
deba@165
  2017
      if (!nodes_done) {
deba@290
  2018
        throw FormatError("Section @nodes not found");
deba@165
  2019
      }
deba@165
  2020
deba@165
  2021
      if (!edges_done) {
deba@290
  2022
        throw FormatError("Section @edges not found");
deba@165
  2023
      }
deba@165
  2024
deba@165
  2025
      if (!attributes_done && !_attributes.empty()) {
deba@290
  2026
        throw FormatError("Section @attributes not found");
deba@165
  2027
      }
deba@165
  2028
deba@165
  2029
    }
deba@165
  2030
deba@165
  2031
    /// @}
alpar@209
  2032
deba@165
  2033
  };
deba@165
  2034
kpeter@487
  2035
  /// \brief Return a \ref GraphReader class
kpeter@487
  2036
  ///
kpeter@487
  2037
  /// This function just returns a \ref GraphReader class.
kpeter@487
  2038
  /// \relates GraphReader
kpeter@487
  2039
  template <typename Graph>
kpeter@487
  2040
  GraphReader<Graph> graphReader(Graph& graph, std::istream& is) {
kpeter@487
  2041
    GraphReader<Graph> tmp(graph, is);
kpeter@487
  2042
    return tmp;
kpeter@487
  2043
  }
kpeter@487
  2044
kpeter@487
  2045
  /// \brief Return a \ref GraphReader class
kpeter@487
  2046
  ///
kpeter@487
  2047
  /// This function just returns a \ref GraphReader class.
kpeter@487
  2048
  /// \relates GraphReader
kpeter@487
  2049
  template <typename Graph>
kpeter@487
  2050
  GraphReader<Graph> graphReader(Graph& graph, const std::string& fn) {
kpeter@487
  2051
    GraphReader<Graph> tmp(graph, fn);
kpeter@487
  2052
    return tmp;
kpeter@487
  2053
  }
kpeter@487
  2054
kpeter@487
  2055
  /// \brief Return a \ref GraphReader class
kpeter@487
  2056
  ///
kpeter@487
  2057
  /// This function just returns a \ref GraphReader class.
kpeter@487
  2058
  /// \relates GraphReader
kpeter@487
  2059
  template <typename Graph>
kpeter@487
  2060
  GraphReader<Graph> graphReader(Graph& graph, const char* fn) {
kpeter@487
  2061
    GraphReader<Graph> tmp(graph, fn);
kpeter@487
  2062
    return tmp;
kpeter@487
  2063
  }
kpeter@487
  2064
deba@190
  2065
  class SectionReader;
deba@190
  2066
deba@190
  2067
  SectionReader sectionReader(std::istream& is);
deba@190
  2068
  SectionReader sectionReader(const std::string& fn);
deba@190
  2069
  SectionReader sectionReader(const char* fn);
alpar@209
  2070
kpeter@192
  2071
  /// \ingroup lemon_io
kpeter@192
  2072
  ///
deba@189
  2073
  /// \brief Section reader class
deba@189
  2074
  ///
alpar@209
  2075
  /// In the \ref lgf-format "LGF" file extra sections can be placed,
kpeter@192
  2076
  /// which contain any data in arbitrary format. Such sections can be
alpar@209
  2077
  /// read with this class. A reading rule can be added to the class
kpeter@192
  2078
  /// with two different functions. With the \c sectionLines() function a
kpeter@192
  2079
  /// functor can process the section line-by-line, while with the \c
deba@189
  2080
  /// sectionStream() member the section can be read from an input
deba@189
  2081
  /// stream.
deba@189
  2082
  class SectionReader {
deba@189
  2083
  private:
alpar@209
  2084
deba@189
  2085
    std::istream* _is;
deba@189
  2086
    bool local_is;
deba@290
  2087
    std::string _filename;
deba@189
  2088
deba@189
  2089
    typedef std::map<std::string, _reader_bits::Section*> Sections;
deba@189
  2090
    Sections _sections;
deba@189
  2091
deba@189
  2092
    int line_num;
deba@189
  2093
    std::istringstream line;
deba@189
  2094
deba@189
  2095
  public:
deba@189
  2096
deba@189
  2097
    /// \brief Constructor
deba@189
  2098
    ///
deba@189
  2099
    /// Construct a section reader, which reads from the given input
deba@189
  2100
    /// stream.
alpar@209
  2101
    SectionReader(std::istream& is)
deba@189
  2102
      : _is(&is), local_is(false) {}
deba@189
  2103
deba@189
  2104
    /// \brief Constructor
deba@189
  2105
    ///
deba@189
  2106
    /// Construct a section reader, which reads from the given file.
alpar@209
  2107
    SectionReader(const std::string& fn)
deba@290
  2108
      : _is(new std::ifstream(fn.c_str())), local_is(true),
deba@290
  2109
        _filename(fn) {
deba@295
  2110
      if (!(*_is)) {
deba@295
  2111
        delete _is;
deba@295
  2112
        throw IoError("Cannot open file", fn);
deba@295
  2113
      }
deba@290
  2114
    }
alpar@209
  2115
deba@189
  2116
    /// \brief Constructor
deba@189
  2117
    ///
deba@189
  2118
    /// Construct a section reader, which reads from the given file.
alpar@209
  2119
    SectionReader(const char* fn)
deba@290
  2120
      : _is(new std::ifstream(fn)), local_is(true),
deba@290
  2121
        _filename(fn) {
deba@295
  2122
      if (!(*_is)) {
deba@295
  2123
        delete _is;
deba@295
  2124
        throw IoError("Cannot open file", fn);
deba@295
  2125
      }
deba@290
  2126
    }
deba@189
  2127
deba@189
  2128
    /// \brief Destructor
deba@189
  2129
    ~SectionReader() {
alpar@209
  2130
      for (Sections::iterator it = _sections.begin();
alpar@209
  2131
           it != _sections.end(); ++it) {
alpar@209
  2132
        delete it->second;
deba@189
  2133
      }
deba@189
  2134
deba@189
  2135
      if (local_is) {
alpar@209
  2136
        delete _is;
deba@189
  2137
      }
deba@189
  2138
deba@189
  2139
    }
deba@189
  2140
deba@189
  2141
  private:
deba@190
  2142
deba@190
  2143
    friend SectionReader sectionReader(std::istream& is);
deba@190
  2144
    friend SectionReader sectionReader(const std::string& fn);
deba@190
  2145
    friend SectionReader sectionReader(const char* fn);
deba@190
  2146
alpar@209
  2147
    SectionReader(SectionReader& other)
deba@190
  2148
      : _is(other._is), local_is(other.local_is) {
deba@190
  2149
deba@190
  2150
      other._is = 0;
deba@190
  2151
      other.local_is = false;
alpar@209
  2152
deba@190
  2153
      _sections.swap(other._sections);
deba@190
  2154
    }
alpar@209
  2155
deba@189
  2156
    SectionReader& operator=(const SectionReader&);
deba@189
  2157
deba@189
  2158
  public:
deba@189
  2159
deba@189
  2160
    /// \name Section readers
deba@189
  2161
    /// @{
deba@189
  2162
deba@189
  2163
    /// \brief Add a section processor with line oriented reading
deba@189
  2164
    ///
deba@189
  2165
    /// The first parameter is the type descriptor of the section, the
deba@189
  2166
    /// second is a functor, which takes just one \c std::string
deba@189
  2167
    /// parameter. At the reading process, each line of the section
deba@189
  2168
    /// will be given to the functor object. However, the empty lines
deba@189
  2169
    /// and the comment lines are filtered out, and the leading
deba@189
  2170
    /// whitespaces are trimmed from each processed string.
deba@189
  2171
    ///
deba@189
  2172
    /// For example let's see a section, which contain several
deba@189
  2173
    /// integers, which should be inserted into a vector.
deba@189
  2174
    ///\code
deba@189
  2175
    ///  @numbers
deba@189
  2176
    ///  12 45 23
deba@189
  2177
    ///  4
deba@189
  2178
    ///  23 6
deba@189
  2179
    ///\endcode
deba@189
  2180
    ///
kpeter@192
  2181
    /// The functor is implemented as a struct:
deba@189
  2182
    ///\code
deba@189
  2183
    ///  struct NumberSection {
deba@189
  2184
    ///    std::vector<int>& _data;
deba@189
  2185
    ///    NumberSection(std::vector<int>& data) : _data(data) {}
deba@189
  2186
    ///    void operator()(const std::string& line) {
deba@189
  2187
    ///      std::istringstream ls(line);
deba@189
  2188
    ///      int value;
deba@189
  2189
    ///      while (ls >> value) _data.push_back(value);
deba@189
  2190
    ///    }
deba@189
  2191
    ///  };
deba@189
  2192
    ///
deba@189
  2193
    ///  // ...
deba@189
  2194
    ///
alpar@209
  2195
    ///  reader.sectionLines("numbers", NumberSection(vec));
deba@189
  2196
    ///\endcode
deba@189
  2197
    template <typename Functor>
deba@189
  2198
    SectionReader& sectionLines(const std::string& type, Functor functor) {
kpeter@192
  2199
      LEMON_ASSERT(!type.empty(), "Type is empty.");
alpar@209
  2200
      LEMON_ASSERT(_sections.find(type) == _sections.end(),
alpar@209
  2201
                   "Multiple reading of section.");
alpar@209
  2202
      _sections.insert(std::make_pair(type,
deba@189
  2203
        new _reader_bits::LineSection<Functor>(functor)));
deba@189
  2204
      return *this;
deba@189
  2205
    }
deba@189
  2206
deba@189
  2207
deba@189
  2208
    /// \brief Add a section processor with stream oriented reading
deba@189
  2209
    ///
deba@189
  2210
    /// The first parameter is the type of the section, the second is
kpeter@192
  2211
    /// a functor, which takes an \c std::istream& and an \c int&
deba@189
  2212
    /// parameter, the latter regard to the line number of stream. The
deba@189
  2213
    /// functor can read the input while the section go on, and the
deba@189
  2214
    /// line number should be modified accordingly.
deba@189
  2215
    template <typename Functor>
deba@189
  2216
    SectionReader& sectionStream(const std::string& type, Functor functor) {
kpeter@192
  2217
      LEMON_ASSERT(!type.empty(), "Type is empty.");
alpar@209
  2218
      LEMON_ASSERT(_sections.find(type) == _sections.end(),
alpar@209
  2219
                   "Multiple reading of section.");
alpar@209
  2220
      _sections.insert(std::make_pair(type,
alpar@209
  2221
         new _reader_bits::StreamSection<Functor>(functor)));
deba@189
  2222
      return *this;
alpar@209
  2223
    }
alpar@209
  2224
deba@189
  2225
    /// @}
deba@189
  2226
deba@189
  2227
  private:
deba@189
  2228
deba@189
  2229
    bool readLine() {
deba@189
  2230
      std::string str;
deba@189
  2231
      while(++line_num, std::getline(*_is, str)) {
alpar@209
  2232
        line.clear(); line.str(str);
alpar@209
  2233
        char c;
alpar@209
  2234
        if (line >> std::ws >> c && c != '#') {
alpar@209
  2235
          line.putback(c);
alpar@209
  2236
          return true;
alpar@209
  2237
        }
deba@189
  2238
      }
deba@189
  2239
      return false;
deba@189
  2240
    }
deba@189
  2241
deba@189
  2242
    bool readSuccess() {
deba@189
  2243
      return static_cast<bool>(*_is);
deba@189
  2244
    }
alpar@209
  2245
deba@189
  2246
    void skipSection() {
deba@189
  2247
      char c;
deba@189
  2248
      while (readSuccess() && line >> c && c != '@') {
alpar@209
  2249
        readLine();
deba@189
  2250
      }
deba@427
  2251
      if (readSuccess()) {
deba@427
  2252
        line.putback(c);
deba@427
  2253
      }
deba@189
  2254
    }
deba@189
  2255
deba@189
  2256
  public:
deba@189
  2257
deba@189
  2258
alpar@209
  2259
    /// \name Execution of the reader
deba@189
  2260
    /// @{
deba@189
  2261
deba@189
  2262
    /// \brief Start the batch processing
deba@189
  2263
    ///
kpeter@192
  2264
    /// This function starts the batch processing.
deba@189
  2265
    void run() {
alpar@209
  2266
deba@189
  2267
      LEMON_ASSERT(_is != 0, "This reader assigned to an other reader");
alpar@209
  2268
deba@189
  2269
      std::set<std::string> extra_sections;
deba@189
  2270
alpar@209
  2271
      line_num = 0;
deba@189
  2272
      readLine();
deba@189
  2273
      skipSection();
deba@189
  2274
deba@189
  2275
      while (readSuccess()) {
alpar@209
  2276
        try {
alpar@209
  2277
          char c;
alpar@209
  2278
          std::string section, caption;
alpar@209
  2279
          line >> c;
alpar@209
  2280
          _reader_bits::readToken(line, section);
alpar@209
  2281
          _reader_bits::readToken(line, caption);
alpar@209
  2282
alpar@209
  2283
          if (line >> c)
kpeter@291
  2284
            throw FormatError("Extra character at the end of line");
alpar@209
  2285
alpar@209
  2286
          if (extra_sections.find(section) != extra_sections.end()) {
alpar@209
  2287
            std::ostringstream msg;
kpeter@291
  2288
            msg << "Multiple occurence of section: " << section;
deba@290
  2289
            throw FormatError(msg.str());
alpar@209
  2290
          }
alpar@209
  2291
          Sections::iterator it = _sections.find(section);
alpar@209
  2292
          if (it != _sections.end()) {
alpar@209
  2293
            extra_sections.insert(section);
alpar@209
  2294
            it->second->process(*_is, line_num);
alpar@209
  2295
          }
alpar@209
  2296
          readLine();
alpar@209
  2297
          skipSection();
deba@290
  2298
        } catch (FormatError& error) {
alpar@209
  2299
          error.line(line_num);
deba@290
  2300
          error.file(_filename);
alpar@209
  2301
          throw;
alpar@209
  2302
        }
deba@189
  2303
      }
deba@189
  2304
      for (Sections::iterator it = _sections.begin();
alpar@209
  2305
           it != _sections.end(); ++it) {
alpar@209
  2306
        if (extra_sections.find(it->first) == extra_sections.end()) {
alpar@209
  2307
          std::ostringstream os;
alpar@209
  2308
          os << "Cannot find section: " << it->first;
deba@290
  2309
          throw FormatError(os.str());
alpar@209
  2310
        }
deba@189
  2311
      }
deba@189
  2312
    }
deba@189
  2313
deba@189
  2314
    /// @}
alpar@209
  2315
deba@189
  2316
  };
deba@189
  2317
kpeter@192
  2318
  /// \brief Return a \ref SectionReader class
alpar@209
  2319
  ///
kpeter@192
  2320
  /// This function just returns a \ref SectionReader class.
deba@189
  2321
  /// \relates SectionReader
deba@189
  2322
  inline SectionReader sectionReader(std::istream& is) {
deba@189
  2323
    SectionReader tmp(is);
deba@189
  2324
    return tmp;
deba@189
  2325
  }
deba@189
  2326
kpeter@192
  2327
  /// \brief Return a \ref SectionReader class
alpar@209
  2328
  ///
kpeter@192
  2329
  /// This function just returns a \ref SectionReader class.
deba@189
  2330
  /// \relates SectionReader
deba@189
  2331
  inline SectionReader sectionReader(const std::string& fn) {
deba@189
  2332
    SectionReader tmp(fn);
deba@189
  2333
    return tmp;
deba@189
  2334
  }
deba@189
  2335
kpeter@192
  2336
  /// \brief Return a \ref SectionReader class
alpar@209
  2337
  ///
kpeter@192
  2338
  /// This function just returns a \ref SectionReader class.
deba@189
  2339
  /// \relates SectionReader
deba@189
  2340
  inline SectionReader sectionReader(const char* fn) {
deba@189
  2341
    SectionReader tmp(fn);
deba@189
  2342
    return tmp;
deba@189
  2343
  }
deba@189
  2344
deba@173
  2345
  /// \ingroup lemon_io
deba@173
  2346
  ///
alpar@209
  2347
  /// \brief Reader for the contents of the \ref lgf-format "LGF" file
deba@173
  2348
  ///
deba@173
  2349
  /// This class can be used to read the sections, the map names and
ladanyi@236
  2350
  /// the attributes from a file. Usually, the LEMON programs know
deba@173
  2351
  /// that, which type of graph, which maps and which attributes
deba@173
  2352
  /// should be read from a file, but in general tools (like glemon)
alpar@179
  2353
  /// the contents of an LGF file should be guessed somehow. This class
deba@173
  2354
  /// reads the graph and stores the appropriate information for
deba@173
  2355
  /// reading the graph.
deba@173
  2356
  ///
alpar@209
  2357
  ///\code
alpar@209
  2358
  /// LgfContents contents("graph.lgf");
alpar@179
  2359
  /// contents.run();
deba@173
  2360
  ///
kpeter@192
  2361
  /// // Does it contain any node section and arc section?
alpar@179
  2362
  /// if (contents.nodeSectionNum() == 0 || contents.arcSectionNum()) {
kpeter@192
  2363
  ///   std::cerr << "Failure, cannot find graph." << std::endl;
deba@173
  2364
  ///   return -1;
deba@173
  2365
  /// }
alpar@209
  2366
  /// std::cout << "The name of the default node section: "
alpar@179
  2367
  ///           << contents.nodeSection(0) << std::endl;
alpar@209
  2368
  /// std::cout << "The number of the arc maps: "
alpar@179
  2369
  ///           << contents.arcMaps(0).size() << std::endl;
alpar@209
  2370
  /// std::cout << "The name of second arc map: "
alpar@179
  2371
  ///           << contents.arcMaps(0)[1] << std::endl;
deba@173
  2372
  ///\endcode
alpar@209
  2373
  class LgfContents {
deba@173
  2374
  private:
deba@173
  2375
deba@173
  2376
    std::istream* _is;
deba@173
  2377
    bool local_is;
deba@173
  2378
deba@173
  2379
    std::vector<std::string> _node_sections;
deba@173
  2380
    std::vector<std::string> _edge_sections;
deba@173
  2381
    std::vector<std::string> _attribute_sections;
deba@173
  2382
    std::vector<std::string> _extra_sections;
deba@173
  2383
deba@173
  2384
    std::vector<bool> _arc_sections;
deba@173
  2385
deba@173
  2386
    std::vector<std::vector<std::string> > _node_maps;
deba@173
  2387
    std::vector<std::vector<std::string> > _edge_maps;
deba@173
  2388
deba@173
  2389
    std::vector<std::vector<std::string> > _attributes;
deba@173
  2390
deba@173
  2391
deba@173
  2392
    int line_num;
deba@173
  2393
    std::istringstream line;
alpar@209
  2394
deba@173
  2395
  public:
deba@173
  2396
deba@173
  2397
    /// \brief Constructor
deba@173
  2398
    ///
alpar@179
  2399
    /// Construct an \e LGF contents reader, which reads from the given
deba@173
  2400
    /// input stream.
alpar@209
  2401
    LgfContents(std::istream& is)
deba@173
  2402
      : _is(&is), local_is(false) {}
deba@173
  2403
deba@173
  2404
    /// \brief Constructor
deba@173
  2405
    ///
alpar@179
  2406
    /// Construct an \e LGF contents reader, which reads from the given
deba@173
  2407
    /// file.
alpar@209
  2408
    LgfContents(const std::string& fn)
deba@290
  2409
      : _is(new std::ifstream(fn.c_str())), local_is(true) {
deba@295
  2410
      if (!(*_is)) {
deba@295
  2411
        delete _is;
deba@295
  2412
        throw IoError("Cannot open file", fn);
deba@295
  2413
      }
deba@290
  2414
    }
deba@173
  2415
deba@173
  2416
    /// \brief Constructor
deba@173
  2417
    ///
alpar@179
  2418
    /// Construct an \e LGF contents reader, which reads from the given
deba@173
  2419
    /// file.
alpar@179
  2420
    LgfContents(const char* fn)
deba@290
  2421
      : _is(new std::ifstream(fn)), local_is(true) {
deba@295
  2422
      if (!(*_is)) {
deba@295
  2423
        delete _is;
deba@295
  2424
        throw IoError("Cannot open file", fn);
deba@295
  2425
      }
deba@290
  2426
    }
alpar@209
  2427
deba@173
  2428
    /// \brief Destructor
alpar@179
  2429
    ~LgfContents() {
deba@173
  2430
      if (local_is) delete _is;
deba@173
  2431
    }
deba@173
  2432
deba@190
  2433
  private:
alpar@209
  2434
deba@190
  2435
    LgfContents(const LgfContents&);
deba@190
  2436
    LgfContents& operator=(const LgfContents&);
deba@190
  2437
deba@190
  2438
  public:
deba@190
  2439
deba@173
  2440
deba@173
  2441
    /// \name Node sections
deba@173
  2442
    /// @{
deba@173
  2443
deba@173
  2444
    /// \brief Gives back the number of node sections in the file.
deba@173
  2445
    ///
deba@173
  2446
    /// Gives back the number of node sections in the file.
deba@173
  2447
    int nodeSectionNum() const {
deba@173
  2448
      return _node_sections.size();
deba@173
  2449
    }
deba@173
  2450
alpar@209
  2451
    /// \brief Returns the node section name at the given position.
deba@173
  2452
    ///
alpar@209
  2453
    /// Returns the node section name at the given position.
deba@173
  2454
    const std::string& nodeSection(int i) const {
deba@173
  2455
      return _node_sections[i];
deba@173
  2456
    }
deba@173
  2457
deba@173
  2458
    /// \brief Gives back the node maps for the given section.
deba@173
  2459
    ///
deba@173
  2460
    /// Gives back the node maps for the given section.
alpar@182
  2461
    const std::vector<std::string>& nodeMapNames(int i) const {
deba@173
  2462
      return _node_maps[i];
deba@173
  2463
    }
deba@173
  2464
deba@173
  2465
    /// @}
deba@173
  2466
alpar@209
  2467
    /// \name Arc/Edge sections
deba@173
  2468
    /// @{
deba@173
  2469
alpar@181
  2470
    /// \brief Gives back the number of arc/edge sections in the file.
deba@173
  2471
    ///
alpar@181
  2472
    /// Gives back the number of arc/edge sections in the file.
alpar@181
  2473
    /// \note It is synonym of \c edgeSectionNum().
deba@173
  2474
    int arcSectionNum() const {
deba@173
  2475
      return _edge_sections.size();
deba@173
  2476
    }
deba@173
  2477
alpar@209
  2478
    /// \brief Returns the arc/edge section name at the given position.
deba@173
  2479
    ///
alpar@209
  2480
    /// Returns the arc/edge section name at the given position.
alpar@181
  2481
    /// \note It is synonym of \c edgeSection().
deba@173
  2482
    const std::string& arcSection(int i) const {
deba@173
  2483
      return _edge_sections[i];
deba@173
  2484
    }
deba@173
  2485
alpar@181
  2486
    /// \brief Gives back the arc/edge maps for the given section.
deba@173
  2487
    ///
alpar@181
  2488
    /// Gives back the arc/edge maps for the given section.
alpar@182
  2489
    /// \note It is synonym of \c edgeMapNames().
alpar@182
  2490
    const std::vector<std::string>& arcMapNames(int i) const {
deba@173
  2491
      return _edge_maps[i];
deba@173
  2492
    }
deba@173
  2493
deba@173
  2494
    /// @}
deba@173
  2495
alpar@181
  2496
    /// \name Synonyms
deba@173
  2497
    /// @{
deba@173
  2498
alpar@181
  2499
    /// \brief Gives back the number of arc/edge sections in the file.
deba@173
  2500
    ///
alpar@181
  2501
    /// Gives back the number of arc/edge sections in the file.
alpar@181
  2502
    /// \note It is synonym of \c arcSectionNum().
deba@173
  2503
    int edgeSectionNum() const {
deba@173
  2504
      return _edge_sections.size();
deba@173
  2505
    }
deba@173
  2506
alpar@209
  2507
    /// \brief Returns the section name at the given position.
deba@173
  2508
    ///
alpar@209
  2509
    /// Returns the section name at the given position.
alpar@181
  2510
    /// \note It is synonym of \c arcSection().
deba@173
  2511
    const std::string& edgeSection(int i) const {
deba@173
  2512
      return _edge_sections[i];
deba@173
  2513
    }
deba@173
  2514
deba@173
  2515
    /// \brief Gives back the edge maps for the given section.
deba@173
  2516
    ///
deba@173
  2517
    /// Gives back the edge maps for the given section.
alpar@182
  2518
    /// \note It is synonym of \c arcMapNames().
alpar@182
  2519
    const std::vector<std::string>& edgeMapNames(int i) const {
deba@173
  2520
      return _edge_maps[i];
deba@173
  2521
    }
deba@173
  2522
deba@173
  2523
    /// @}
deba@173
  2524
alpar@209
  2525
    /// \name Attribute sections
deba@173
  2526
    /// @{
deba@173
  2527
deba@173
  2528
    /// \brief Gives back the number of attribute sections in the file.
deba@173
  2529
    ///
deba@173
  2530
    /// Gives back the number of attribute sections in the file.
deba@173
  2531
    int attributeSectionNum() const {
deba@173
  2532
      return _attribute_sections.size();
deba@173
  2533
    }
deba@173
  2534
alpar@209
  2535
    /// \brief Returns the attribute section name at the given position.
deba@173
  2536
    ///
alpar@209
  2537
    /// Returns the attribute section name at the given position.
alpar@182
  2538
    const std::string& attributeSectionNames(int i) const {
deba@173
  2539
      return _attribute_sections[i];
deba@173
  2540
    }
deba@173
  2541
deba@173
  2542
    /// \brief Gives back the attributes for the given section.
deba@173
  2543
    ///
deba@173
  2544
    /// Gives back the attributes for the given section.
deba@173
  2545
    const std::vector<std::string>& attributes(int i) const {
deba@173
  2546
      return _attributes[i];
deba@173
  2547
    }
deba@173
  2548
deba@173
  2549
    /// @}
deba@173
  2550
alpar@209
  2551
    /// \name Extra sections
deba@173
  2552
    /// @{
deba@173
  2553
deba@173
  2554
    /// \brief Gives back the number of extra sections in the file.
deba@173
  2555
    ///
deba@173
  2556
    /// Gives back the number of extra sections in the file.
deba@173
  2557
    int extraSectionNum() const {
deba@173
  2558
      return _extra_sections.size();
deba@173
  2559
    }
deba@173
  2560
alpar@209
  2561
    /// \brief Returns the extra section type at the given position.
deba@173
  2562
    ///
alpar@209
  2563
    /// Returns the section type at the given position.
deba@173
  2564
    const std::string& extraSection(int i) const {
deba@173
  2565
      return _extra_sections[i];
deba@173
  2566
    }
deba@173
  2567
deba@173
  2568
    /// @}
deba@173
  2569
deba@173
  2570
  private:
deba@173
  2571
deba@173
  2572
    bool readLine() {
deba@173
  2573
      std::string str;
deba@173
  2574
      while(++line_num, std::getline(*_is, str)) {
alpar@209
  2575
        line.clear(); line.str(str);
alpar@209
  2576
        char c;
alpar@209
  2577
        if (line >> std::ws >> c && c != '#') {
alpar@209
  2578
          line.putback(c);
alpar@209
  2579
          return true;
alpar@209
  2580
        }
deba@173
  2581
      }
deba@173
  2582
      return false;
deba@173
  2583
    }
deba@173
  2584
deba@173
  2585
    bool readSuccess() {
deba@173
  2586
      return static_cast<bool>(*_is);
deba@173
  2587
    }
deba@173
  2588
deba@173
  2589
    void skipSection() {
deba@173
  2590
      char c;
deba@173
  2591
      while (readSuccess() && line >> c && c != '@') {
alpar@209
  2592
        readLine();
deba@173
  2593
      }
deba@427
  2594
      if (readSuccess()) {
deba@427
  2595
        line.putback(c);
deba@427
  2596
      }
deba@173
  2597
    }
deba@173
  2598
deba@173
  2599
    void readMaps(std::vector<std::string>& maps) {
deba@186
  2600
      char c;
deba@186
  2601
      if (!readLine() || !(line >> c) || c == '@') {
alpar@209
  2602
        if (readSuccess() && line) line.putback(c);
alpar@209
  2603
        return;
deba@186
  2604
      }
deba@186
  2605
      line.putback(c);
deba@173
  2606
      std::string map;
deba@173
  2607
      while (_reader_bits::readToken(line, map)) {
alpar@209
  2608
        maps.push_back(map);
deba@173
  2609
      }
deba@173
  2610
    }
deba@173
  2611
deba@173
  2612
    void readAttributes(std::vector<std::string>& attrs) {
deba@173
  2613
      readLine();
deba@173
  2614
      char c;
deba@173
  2615
      while (readSuccess() && line >> c && c != '@') {
alpar@209
  2616
        line.putback(c);
alpar@209
  2617
        std::string attr;
alpar@209
  2618
        _reader_bits::readToken(line, attr);
alpar@209
  2619
        attrs.push_back(attr);
alpar@209
  2620
        readLine();
deba@173
  2621
      }
deba@173
  2622
      line.putback(c);
deba@173
  2623
    }
deba@173
  2624
deba@173
  2625
  public:
deba@173
  2626
alpar@209
  2627
    /// \name Execution of the contents reader
deba@173
  2628
    /// @{
deba@173
  2629
kpeter@192
  2630
    /// \brief Starts the reading
deba@173
  2631
    ///
kpeter@192
  2632
    /// This function starts the reading.
deba@173
  2633
    void run() {
deba@173
  2634
deba@173
  2635
      readLine();
deba@173
  2636
      skipSection();
deba@173
  2637
deba@173
  2638
      while (readSuccess()) {
deba@173
  2639
alpar@209
  2640
        char c;
alpar@209
  2641
        line >> c;
alpar@209
  2642
alpar@209
  2643
        std::string section, caption;
alpar@209
  2644
        _reader_bits::readToken(line, section);
alpar@209
  2645
        _reader_bits::readToken(line, caption);
alpar@209
  2646
alpar@209
  2647
        if (section == "nodes") {
alpar@209
  2648
          _node_sections.push_back(caption);
alpar@209
  2649
          _node_maps.push_back(std::vector<std::string>());
alpar@209
  2650
          readMaps(_node_maps.back());
alpar@209
  2651
          readLine(); skipSection();
alpar@209
  2652
        } else if (section == "arcs" || section == "edges") {
alpar@209
  2653
          _edge_sections.push_back(caption);
alpar@209
  2654
          _arc_sections.push_back(section == "arcs");
alpar@209
  2655
          _edge_maps.push_back(std::vector<std::string>());
alpar@209
  2656
          readMaps(_edge_maps.back());
alpar@209
  2657
          readLine(); skipSection();
alpar@209
  2658
        } else if (section == "attributes") {
alpar@209
  2659
          _attribute_sections.push_back(caption);
alpar@209
  2660
          _attributes.push_back(std::vector<std::string>());
alpar@209
  2661
          readAttributes(_attributes.back());
alpar@209
  2662
        } else {
alpar@209
  2663
          _extra_sections.push_back(section);
alpar@209
  2664
          readLine(); skipSection();
alpar@209
  2665
        }
deba@173
  2666
      }
deba@173
  2667
    }
deba@173
  2668
deba@173
  2669
    /// @}
alpar@209
  2670
deba@173
  2671
  };
deba@127
  2672
}
deba@127
  2673
deba@127
  2674
#endif