1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library. |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | ///\ingroup lemon_io |
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20 | ///\file |
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21 | ///\brief \ref lgf-format "LEMON Graph Format" reader. |
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22 | |
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23 | |
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24 | #ifndef LEMON_LGF_READER_H |
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25 | #define LEMON_LGF_READER_H |
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26 | |
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27 | #include <iostream> |
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28 | #include <fstream> |
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29 | #include <sstream> |
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30 | |
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31 | #include <set> |
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32 | #include <map> |
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33 | |
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34 | #include <lemon/core.h> |
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35 | |
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36 | #include <lemon/lgf_writer.h> |
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37 | |
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38 | #include <lemon/concept_check.h> |
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39 | #include <lemon/concepts/maps.h> |
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40 | |
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41 | namespace lemon { |
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42 | |
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43 | namespace _reader_bits { |
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44 | |
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45 | template <typename Value> |
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46 | struct DefaultConverter { |
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47 | Value operator()(const std::string& str) { |
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48 | std::istringstream is(str); |
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49 | Value value; |
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50 | if (!(is >> value)) { |
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51 | throw FormatError("Cannot read token"); |
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52 | } |
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53 | |
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54 | char c; |
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55 | if (is >> std::ws >> c) { |
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56 | throw FormatError("Remaining characters in token"); |
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57 | } |
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58 | return value; |
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59 | } |
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60 | }; |
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61 | |
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62 | template <> |
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63 | struct DefaultConverter<std::string> { |
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64 | std::string operator()(const std::string& str) { |
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65 | return str; |
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66 | } |
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67 | }; |
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68 | |
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69 | template <typename _Item> |
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70 | class MapStorageBase { |
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71 | public: |
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72 | typedef _Item Item; |
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73 | |
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74 | public: |
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75 | MapStorageBase() {} |
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76 | virtual ~MapStorageBase() {} |
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77 | |
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78 | virtual void set(const Item& item, const std::string& value) = 0; |
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79 | |
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80 | }; |
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81 | |
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82 | template <typename _Item, typename _Map, |
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83 | typename _Converter = DefaultConverter<typename _Map::Value> > |
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84 | class MapStorage : public MapStorageBase<_Item> { |
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85 | public: |
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86 | typedef _Map Map; |
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87 | typedef _Converter Converter; |
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88 | typedef _Item Item; |
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89 | |
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90 | private: |
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91 | Map& _map; |
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92 | Converter _converter; |
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93 | |
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94 | public: |
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95 | MapStorage(Map& map, const Converter& converter = Converter()) |
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96 | : _map(map), _converter(converter) {} |
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97 | virtual ~MapStorage() {} |
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98 | |
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99 | virtual void set(const Item& item ,const std::string& value) { |
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100 | _map.set(item, _converter(value)); |
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101 | } |
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102 | }; |
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103 | |
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104 | template <typename _Graph, bool _dir, typename _Map, |
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105 | typename _Converter = DefaultConverter<typename _Map::Value> > |
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106 | class GraphArcMapStorage : public MapStorageBase<typename _Graph::Edge> { |
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107 | public: |
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108 | typedef _Map Map; |
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109 | typedef _Converter Converter; |
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110 | typedef _Graph Graph; |
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111 | typedef typename Graph::Edge Item; |
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112 | static const bool dir = _dir; |
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113 | |
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114 | private: |
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115 | const Graph& _graph; |
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116 | Map& _map; |
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117 | Converter _converter; |
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118 | |
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119 | public: |
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120 | GraphArcMapStorage(const Graph& graph, Map& map, |
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121 | const Converter& converter = Converter()) |
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122 | : _graph(graph), _map(map), _converter(converter) {} |
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123 | virtual ~GraphArcMapStorage() {} |
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124 | |
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125 | virtual void set(const Item& item ,const std::string& value) { |
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126 | _map.set(_graph.direct(item, dir), _converter(value)); |
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127 | } |
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128 | }; |
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129 | |
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130 | class ValueStorageBase { |
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131 | public: |
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132 | ValueStorageBase() {} |
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133 | virtual ~ValueStorageBase() {} |
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134 | |
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135 | virtual void set(const std::string&) = 0; |
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136 | }; |
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137 | |
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138 | template <typename _Value, typename _Converter = DefaultConverter<_Value> > |
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139 | class ValueStorage : public ValueStorageBase { |
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140 | public: |
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141 | typedef _Value Value; |
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142 | typedef _Converter Converter; |
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143 | |
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144 | private: |
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145 | Value& _value; |
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146 | Converter _converter; |
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147 | |
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148 | public: |
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149 | ValueStorage(Value& value, const Converter& converter = Converter()) |
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150 | : _value(value), _converter(converter) {} |
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151 | |
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152 | virtual void set(const std::string& value) { |
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153 | _value = _converter(value); |
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154 | } |
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155 | }; |
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156 | |
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157 | template <typename Value> |
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158 | struct MapLookUpConverter { |
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159 | const std::map<std::string, Value>& _map; |
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160 | |
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161 | MapLookUpConverter(const std::map<std::string, Value>& map) |
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162 | : _map(map) {} |
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163 | |
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164 | Value operator()(const std::string& str) { |
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165 | typename std::map<std::string, Value>::const_iterator it = |
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166 | _map.find(str); |
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167 | if (it == _map.end()) { |
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168 | std::ostringstream msg; |
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169 | msg << "Item not found: " << str; |
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170 | throw FormatError(msg.str()); |
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171 | } |
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172 | return it->second; |
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173 | } |
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174 | }; |
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175 | |
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176 | template <typename Graph> |
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177 | struct GraphArcLookUpConverter { |
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178 | const Graph& _graph; |
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179 | const std::map<std::string, typename Graph::Edge>& _map; |
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180 | |
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181 | GraphArcLookUpConverter(const Graph& graph, |
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182 | const std::map<std::string, |
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183 | typename Graph::Edge>& map) |
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184 | : _graph(graph), _map(map) {} |
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185 | |
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186 | typename Graph::Arc operator()(const std::string& str) { |
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187 | if (str.empty() || (str[0] != '+' && str[0] != '-')) { |
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188 | throw FormatError("Item must start with '+' or '-'"); |
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189 | } |
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190 | typename std::map<std::string, typename Graph::Edge> |
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191 | ::const_iterator it = _map.find(str.substr(1)); |
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192 | if (it == _map.end()) { |
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193 | throw FormatError("Item not found"); |
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194 | } |
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195 | return _graph.direct(it->second, str[0] == '+'); |
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196 | } |
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197 | }; |
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198 | |
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199 | inline bool isWhiteSpace(char c) { |
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200 | return c == ' ' || c == '\t' || c == '\v' || |
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201 | c == '\n' || c == '\r' || c == '\f'; |
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202 | } |
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203 | |
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204 | inline bool isOct(char c) { |
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205 | return '0' <= c && c <='7'; |
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206 | } |
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207 | |
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208 | inline int valueOct(char c) { |
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209 | LEMON_ASSERT(isOct(c), "The character is not octal."); |
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210 | return c - '0'; |
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211 | } |
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212 | |
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213 | inline bool isHex(char c) { |
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214 | return ('0' <= c && c <= '9') || |
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215 | ('a' <= c && c <= 'z') || |
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216 | ('A' <= c && c <= 'Z'); |
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217 | } |
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218 | |
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219 | inline int valueHex(char c) { |
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220 | LEMON_ASSERT(isHex(c), "The character is not hexadecimal."); |
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221 | if ('0' <= c && c <= '9') return c - '0'; |
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222 | if ('a' <= c && c <= 'z') return c - 'a' + 10; |
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223 | return c - 'A' + 10; |
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224 | } |
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225 | |
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226 | inline bool isIdentifierFirstChar(char c) { |
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227 | return ('a' <= c && c <= 'z') || |
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228 | ('A' <= c && c <= 'Z') || c == '_'; |
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229 | } |
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230 | |
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231 | inline bool isIdentifierChar(char c) { |
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232 | return isIdentifierFirstChar(c) || |
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233 | ('0' <= c && c <= '9'); |
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234 | } |
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235 | |
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236 | inline char readEscape(std::istream& is) { |
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237 | char c; |
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238 | if (!is.get(c)) |
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239 | throw FormatError("Escape format error"); |
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240 | |
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241 | switch (c) { |
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242 | case '\\': |
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243 | return '\\'; |
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244 | case '\"': |
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245 | return '\"'; |
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246 | case '\'': |
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247 | return '\''; |
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248 | case '\?': |
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249 | return '\?'; |
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250 | case 'a': |
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251 | return '\a'; |
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252 | case 'b': |
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253 | return '\b'; |
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254 | case 'f': |
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255 | return '\f'; |
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256 | case 'n': |
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257 | return '\n'; |
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258 | case 'r': |
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259 | return '\r'; |
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260 | case 't': |
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261 | return '\t'; |
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262 | case 'v': |
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263 | return '\v'; |
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264 | case 'x': |
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265 | { |
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266 | int code; |
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267 | if (!is.get(c) || !isHex(c)) |
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268 | throw FormatError("Escape format error"); |
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269 | else if (code = valueHex(c), !is.get(c) || !isHex(c)) is.putback(c); |
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270 | else code = code * 16 + valueHex(c); |
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271 | return code; |
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272 | } |
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273 | default: |
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274 | { |
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275 | int code; |
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276 | if (!isOct(c)) |
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277 | throw FormatError("Escape format error"); |
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278 | else if (code = valueOct(c), !is.get(c) || !isOct(c)) |
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279 | is.putback(c); |
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280 | else if (code = code * 8 + valueOct(c), !is.get(c) || !isOct(c)) |
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281 | is.putback(c); |
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282 | else code = code * 8 + valueOct(c); |
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283 | return code; |
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284 | } |
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285 | } |
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286 | } |
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287 | |
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288 | inline std::istream& readToken(std::istream& is, std::string& str) { |
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289 | std::ostringstream os; |
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290 | |
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291 | char c; |
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292 | is >> std::ws; |
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293 | |
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294 | if (!is.get(c)) |
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295 | return is; |
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296 | |
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297 | if (c == '\"') { |
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298 | while (is.get(c) && c != '\"') { |
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299 | if (c == '\\') |
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300 | c = readEscape(is); |
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301 | os << c; |
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302 | } |
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303 | if (!is) |
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304 | throw FormatError("Quoted format error"); |
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305 | } else { |
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306 | is.putback(c); |
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307 | while (is.get(c) && !isWhiteSpace(c)) { |
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308 | if (c == '\\') |
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309 | c = readEscape(is); |
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310 | os << c; |
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311 | } |
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312 | if (!is) { |
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313 | is.clear(); |
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314 | } else { |
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315 | is.putback(c); |
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316 | } |
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317 | } |
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318 | str = os.str(); |
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319 | return is; |
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320 | } |
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321 | |
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322 | class Section { |
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323 | public: |
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324 | virtual ~Section() {} |
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325 | virtual void process(std::istream& is, int& line_num) = 0; |
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326 | }; |
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327 | |
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328 | template <typename Functor> |
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329 | class LineSection : public Section { |
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330 | private: |
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331 | |
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332 | Functor _functor; |
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333 | |
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334 | public: |
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335 | |
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336 | LineSection(const Functor& functor) : _functor(functor) {} |
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337 | virtual ~LineSection() {} |
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338 | |
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339 | virtual void process(std::istream& is, int& line_num) { |
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340 | char c; |
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341 | std::string line; |
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342 | while (is.get(c) && c != '@') { |
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343 | if (c == '\n') { |
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344 | ++line_num; |
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345 | } else if (c == '#') { |
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346 | getline(is, line); |
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347 | ++line_num; |
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348 | } else if (!isWhiteSpace(c)) { |
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349 | is.putback(c); |
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350 | getline(is, line); |
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351 | _functor(line); |
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352 | ++line_num; |
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353 | } |
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354 | } |
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355 | if (is) is.putback(c); |
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356 | else if (is.eof()) is.clear(); |
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357 | } |
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358 | }; |
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359 | |
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360 | template <typename Functor> |
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361 | class StreamSection : public Section { |
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362 | private: |
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363 | |
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364 | Functor _functor; |
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365 | |
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366 | public: |
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367 | |
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368 | StreamSection(const Functor& functor) : _functor(functor) {} |
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369 | virtual ~StreamSection() {} |
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370 | |
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371 | virtual void process(std::istream& is, int& line_num) { |
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372 | _functor(is, line_num); |
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373 | char c; |
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374 | std::string line; |
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375 | while (is.get(c) && c != '@') { |
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376 | if (c == '\n') { |
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377 | ++line_num; |
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378 | } else if (!isWhiteSpace(c)) { |
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379 | getline(is, line); |
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380 | ++line_num; |
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381 | } |
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382 | } |
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383 | if (is) is.putback(c); |
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384 | else if (is.eof()) is.clear(); |
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385 | } |
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386 | }; |
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387 | |
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388 | } |
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389 | |
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390 | template <typename Digraph> |
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391 | class DigraphReader; |
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392 | |
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393 | /// \brief Return a \ref DigraphReader class |
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394 | /// |
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395 | /// This function just returns a \ref DigraphReader class. |
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396 | /// \relates DigraphReader |
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397 | template <typename Digraph> |
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398 | DigraphReader<Digraph> digraphReader(Digraph& digraph, |
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399 | std::istream& is = std::cin) { |
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400 | DigraphReader<Digraph> tmp(digraph, is); |
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401 | return tmp; |
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402 | } |
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403 | |
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404 | /// \brief Return a \ref DigraphReader class |
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405 | /// |
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406 | /// This function just returns a \ref DigraphReader class. |
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407 | /// \relates DigraphReader |
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408 | template <typename Digraph> |
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409 | DigraphReader<Digraph> digraphReader(Digraph& digraph, |
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410 | const std::string& fn) { |
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411 | DigraphReader<Digraph> tmp(digraph, fn); |
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412 | return tmp; |
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413 | } |
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414 | |
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415 | /// \brief Return a \ref DigraphReader class |
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416 | /// |
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417 | /// This function just returns a \ref DigraphReader class. |
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418 | /// \relates DigraphReader |
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419 | template <typename Digraph> |
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420 | DigraphReader<Digraph> digraphReader(Digraph& digraph, const char* fn) { |
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421 | DigraphReader<Digraph> tmp(digraph, fn); |
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422 | return tmp; |
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423 | } |
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424 | |
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425 | /// \ingroup lemon_io |
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426 | /// |
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427 | /// \brief \ref lgf-format "LGF" reader for directed graphs |
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428 | /// |
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429 | /// This utility reads an \ref lgf-format "LGF" file. |
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430 | /// |
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431 | /// The reading method does a batch processing. The user creates a |
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432 | /// reader object, then various reading rules can be added to the |
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433 | /// reader, and eventually the reading is executed with the \c run() |
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434 | /// member function. A map reading rule can be added to the reader |
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435 | /// with the \c nodeMap() or \c arcMap() members. An optional |
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436 | /// converter parameter can also be added as a standard functor |
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437 | /// converting from \c std::string to the value type of the map. If it |
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438 | /// is set, it will determine how the tokens in the file should be |
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439 | /// converted to the value type of the map. If the functor is not set, |
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440 | /// then a default conversion will be used. One map can be read into |
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441 | /// multiple map objects at the same time. The \c attribute(), \c |
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442 | /// node() and \c arc() functions are used to add attribute reading |
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443 | /// rules. |
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444 | /// |
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445 | ///\code |
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446 | /// DigraphReader<Digraph>(digraph, std::cin). |
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447 | /// nodeMap("coordinates", coord_map). |
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448 | /// arcMap("capacity", cap_map). |
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449 | /// node("source", src). |
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450 | /// node("target", trg). |
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451 | /// attribute("caption", caption). |
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452 | /// run(); |
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453 | ///\endcode |
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454 | /// |
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455 | /// By default the reader uses the first section in the file of the |
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456 | /// proper type. If a section has an optional name, then it can be |
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457 | /// selected for reading by giving an optional name parameter to the |
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458 | /// \c nodes(), \c arcs() or \c attributes() functions. |
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459 | /// |
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460 | /// The \c useNodes() and \c useArcs() functions are used to tell the reader |
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461 | /// that the nodes or arcs should not be constructed (added to the |
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462 | /// graph) during the reading, but instead the label map of the items |
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463 | /// are given as a parameter of these functions. An |
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464 | /// application of these functions is multipass reading, which is |
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465 | /// important if two \c \@arcs sections must be read from the |
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466 | /// file. In this case the first phase would read the node set and one |
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467 | /// of the arc sets, while the second phase would read the second arc |
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468 | /// set into an \e ArcSet class (\c SmartArcSet or \c ListArcSet). |
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469 | /// The previously read label node map should be passed to the \c |
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470 | /// useNodes() functions. Another application of multipass reading when |
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471 | /// paths are given as a node map or an arc map. |
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472 | /// It is impossible to read this in |
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473 | /// a single pass, because the arcs are not constructed when the node |
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474 | /// maps are read. |
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475 | template <typename _Digraph> |
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476 | class DigraphReader { |
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477 | public: |
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478 | |
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479 | typedef _Digraph Digraph; |
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480 | TEMPLATE_DIGRAPH_TYPEDEFS(Digraph); |
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481 | |
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482 | private: |
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483 | |
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484 | |
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485 | std::istream* _is; |
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486 | bool local_is; |
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487 | std::string _filename; |
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488 | |
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489 | Digraph& _digraph; |
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490 | |
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491 | std::string _nodes_caption; |
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492 | std::string _arcs_caption; |
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493 | std::string _attributes_caption; |
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494 | |
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495 | typedef std::map<std::string, Node> NodeIndex; |
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496 | NodeIndex _node_index; |
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497 | typedef std::map<std::string, Arc> ArcIndex; |
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498 | ArcIndex _arc_index; |
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499 | |
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500 | typedef std::vector<std::pair<std::string, |
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501 | _reader_bits::MapStorageBase<Node>*> > NodeMaps; |
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502 | NodeMaps _node_maps; |
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503 | |
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504 | typedef std::vector<std::pair<std::string, |
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505 | _reader_bits::MapStorageBase<Arc>*> >ArcMaps; |
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506 | ArcMaps _arc_maps; |
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507 | |
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508 | typedef std::multimap<std::string, _reader_bits::ValueStorageBase*> |
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509 | Attributes; |
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510 | Attributes _attributes; |
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511 | |
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512 | bool _use_nodes; |
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513 | bool _use_arcs; |
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514 | |
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515 | bool _skip_nodes; |
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516 | bool _skip_arcs; |
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517 | |
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518 | int line_num; |
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519 | std::istringstream line; |
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520 | |
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521 | public: |
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522 | |
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523 | /// \brief Constructor |
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524 | /// |
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525 | /// Construct a directed graph reader, which reads from the given |
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526 | /// input stream. |
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527 | DigraphReader(Digraph& digraph, std::istream& is = std::cin) |
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528 | : _is(&is), local_is(false), _digraph(digraph), |
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529 | _use_nodes(false), _use_arcs(false), |
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530 | _skip_nodes(false), _skip_arcs(false) {} |
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531 | |
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532 | /// \brief Constructor |
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533 | /// |
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534 | /// Construct a directed graph reader, which reads from the given |
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535 | /// file. |
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536 | DigraphReader(Digraph& digraph, const std::string& fn) |
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537 | : _is(new std::ifstream(fn.c_str())), local_is(true), |
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538 | _filename(fn), _digraph(digraph), |
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539 | _use_nodes(false), _use_arcs(false), |
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540 | _skip_nodes(false), _skip_arcs(false) { |
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541 | if (!(*_is)) { |
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542 | delete _is; |
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543 | throw IoError("Cannot open file", fn); |
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544 | } |
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545 | } |
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546 | |
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547 | /// \brief Constructor |
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548 | /// |
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549 | /// Construct a directed graph reader, which reads from the given |
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550 | /// file. |
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551 | DigraphReader(Digraph& digraph, const char* fn) |
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552 | : _is(new std::ifstream(fn)), local_is(true), |
---|
553 | _filename(fn), _digraph(digraph), |
---|
554 | _use_nodes(false), _use_arcs(false), |
---|
555 | _skip_nodes(false), _skip_arcs(false) { |
---|
556 | if (!(*_is)) { |
---|
557 | delete _is; |
---|
558 | throw IoError("Cannot open file", fn); |
---|
559 | } |
---|
560 | } |
---|
561 | |
---|
562 | /// \brief Destructor |
---|
563 | ~DigraphReader() { |
---|
564 | for (typename NodeMaps::iterator it = _node_maps.begin(); |
---|
565 | it != _node_maps.end(); ++it) { |
---|
566 | delete it->second; |
---|
567 | } |
---|
568 | |
---|
569 | for (typename ArcMaps::iterator it = _arc_maps.begin(); |
---|
570 | it != _arc_maps.end(); ++it) { |
---|
571 | delete it->second; |
---|
572 | } |
---|
573 | |
---|
574 | for (typename Attributes::iterator it = _attributes.begin(); |
---|
575 | it != _attributes.end(); ++it) { |
---|
576 | delete it->second; |
---|
577 | } |
---|
578 | |
---|
579 | if (local_is) { |
---|
580 | delete _is; |
---|
581 | } |
---|
582 | |
---|
583 | } |
---|
584 | |
---|
585 | private: |
---|
586 | |
---|
587 | friend DigraphReader<Digraph> digraphReader<>(Digraph& digraph, |
---|
588 | std::istream& is); |
---|
589 | friend DigraphReader<Digraph> digraphReader<>(Digraph& digraph, |
---|
590 | const std::string& fn); |
---|
591 | friend DigraphReader<Digraph> digraphReader<>(Digraph& digraph, |
---|
592 | const char *fn); |
---|
593 | |
---|
594 | DigraphReader(DigraphReader& other) |
---|
595 | : _is(other._is), local_is(other.local_is), _digraph(other._digraph), |
---|
596 | _use_nodes(other._use_nodes), _use_arcs(other._use_arcs), |
---|
597 | _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) { |
---|
598 | |
---|
599 | other._is = 0; |
---|
600 | other.local_is = false; |
---|
601 | |
---|
602 | _node_index.swap(other._node_index); |
---|
603 | _arc_index.swap(other._arc_index); |
---|
604 | |
---|
605 | _node_maps.swap(other._node_maps); |
---|
606 | _arc_maps.swap(other._arc_maps); |
---|
607 | _attributes.swap(other._attributes); |
---|
608 | |
---|
609 | _nodes_caption = other._nodes_caption; |
---|
610 | _arcs_caption = other._arcs_caption; |
---|
611 | _attributes_caption = other._attributes_caption; |
---|
612 | |
---|
613 | } |
---|
614 | |
---|
615 | DigraphReader& operator=(const DigraphReader&); |
---|
616 | |
---|
617 | public: |
---|
618 | |
---|
619 | /// \name Reading rules |
---|
620 | /// @{ |
---|
621 | |
---|
622 | /// \brief Node map reading rule |
---|
623 | /// |
---|
624 | /// Add a node map reading rule to the reader. |
---|
625 | template <typename Map> |
---|
626 | DigraphReader& nodeMap(const std::string& caption, Map& map) { |
---|
627 | checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>(); |
---|
628 | _reader_bits::MapStorageBase<Node>* storage = |
---|
629 | new _reader_bits::MapStorage<Node, Map>(map); |
---|
630 | _node_maps.push_back(std::make_pair(caption, storage)); |
---|
631 | return *this; |
---|
632 | } |
---|
633 | |
---|
634 | /// \brief Node map reading rule |
---|
635 | /// |
---|
636 | /// Add a node map reading rule with specialized converter to the |
---|
637 | /// reader. |
---|
638 | template <typename Map, typename Converter> |
---|
639 | DigraphReader& nodeMap(const std::string& caption, Map& map, |
---|
640 | const Converter& converter = Converter()) { |
---|
641 | checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>(); |
---|
642 | _reader_bits::MapStorageBase<Node>* storage = |
---|
643 | new _reader_bits::MapStorage<Node, Map, Converter>(map, converter); |
---|
644 | _node_maps.push_back(std::make_pair(caption, storage)); |
---|
645 | return *this; |
---|
646 | } |
---|
647 | |
---|
648 | /// \brief Arc map reading rule |
---|
649 | /// |
---|
650 | /// Add an arc map reading rule to the reader. |
---|
651 | template <typename Map> |
---|
652 | DigraphReader& arcMap(const std::string& caption, Map& map) { |
---|
653 | checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>(); |
---|
654 | _reader_bits::MapStorageBase<Arc>* storage = |
---|
655 | new _reader_bits::MapStorage<Arc, Map>(map); |
---|
656 | _arc_maps.push_back(std::make_pair(caption, storage)); |
---|
657 | return *this; |
---|
658 | } |
---|
659 | |
---|
660 | /// \brief Arc map reading rule |
---|
661 | /// |
---|
662 | /// Add an arc map reading rule with specialized converter to the |
---|
663 | /// reader. |
---|
664 | template <typename Map, typename Converter> |
---|
665 | DigraphReader& arcMap(const std::string& caption, Map& map, |
---|
666 | const Converter& converter = Converter()) { |
---|
667 | checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>(); |
---|
668 | _reader_bits::MapStorageBase<Arc>* storage = |
---|
669 | new _reader_bits::MapStorage<Arc, Map, Converter>(map, converter); |
---|
670 | _arc_maps.push_back(std::make_pair(caption, storage)); |
---|
671 | return *this; |
---|
672 | } |
---|
673 | |
---|
674 | /// \brief Attribute reading rule |
---|
675 | /// |
---|
676 | /// Add an attribute reading rule to the reader. |
---|
677 | template <typename Value> |
---|
678 | DigraphReader& attribute(const std::string& caption, Value& value) { |
---|
679 | _reader_bits::ValueStorageBase* storage = |
---|
680 | new _reader_bits::ValueStorage<Value>(value); |
---|
681 | _attributes.insert(std::make_pair(caption, storage)); |
---|
682 | return *this; |
---|
683 | } |
---|
684 | |
---|
685 | /// \brief Attribute reading rule |
---|
686 | /// |
---|
687 | /// Add an attribute reading rule with specialized converter to the |
---|
688 | /// reader. |
---|
689 | template <typename Value, typename Converter> |
---|
690 | DigraphReader& attribute(const std::string& caption, Value& value, |
---|
691 | const Converter& converter = Converter()) { |
---|
692 | _reader_bits::ValueStorageBase* storage = |
---|
693 | new _reader_bits::ValueStorage<Value, Converter>(value, converter); |
---|
694 | _attributes.insert(std::make_pair(caption, storage)); |
---|
695 | return *this; |
---|
696 | } |
---|
697 | |
---|
698 | /// \brief Node reading rule |
---|
699 | /// |
---|
700 | /// Add a node reading rule to reader. |
---|
701 | DigraphReader& node(const std::string& caption, Node& node) { |
---|
702 | typedef _reader_bits::MapLookUpConverter<Node> Converter; |
---|
703 | Converter converter(_node_index); |
---|
704 | _reader_bits::ValueStorageBase* storage = |
---|
705 | new _reader_bits::ValueStorage<Node, Converter>(node, converter); |
---|
706 | _attributes.insert(std::make_pair(caption, storage)); |
---|
707 | return *this; |
---|
708 | } |
---|
709 | |
---|
710 | /// \brief Arc reading rule |
---|
711 | /// |
---|
712 | /// Add an arc reading rule to reader. |
---|
713 | DigraphReader& arc(const std::string& caption, Arc& arc) { |
---|
714 | typedef _reader_bits::MapLookUpConverter<Arc> Converter; |
---|
715 | Converter converter(_arc_index); |
---|
716 | _reader_bits::ValueStorageBase* storage = |
---|
717 | new _reader_bits::ValueStorage<Arc, Converter>(arc, converter); |
---|
718 | _attributes.insert(std::make_pair(caption, storage)); |
---|
719 | return *this; |
---|
720 | } |
---|
721 | |
---|
722 | /// @} |
---|
723 | |
---|
724 | /// \name Select section by name |
---|
725 | /// @{ |
---|
726 | |
---|
727 | /// \brief Set \c \@nodes section to be read |
---|
728 | /// |
---|
729 | /// Set \c \@nodes section to be read |
---|
730 | DigraphReader& nodes(const std::string& caption) { |
---|
731 | _nodes_caption = caption; |
---|
732 | return *this; |
---|
733 | } |
---|
734 | |
---|
735 | /// \brief Set \c \@arcs section to be read |
---|
736 | /// |
---|
737 | /// Set \c \@arcs section to be read |
---|
738 | DigraphReader& arcs(const std::string& caption) { |
---|
739 | _arcs_caption = caption; |
---|
740 | return *this; |
---|
741 | } |
---|
742 | |
---|
743 | /// \brief Set \c \@attributes section to be read |
---|
744 | /// |
---|
745 | /// Set \c \@attributes section to be read |
---|
746 | DigraphReader& attributes(const std::string& caption) { |
---|
747 | _attributes_caption = caption; |
---|
748 | return *this; |
---|
749 | } |
---|
750 | |
---|
751 | /// @} |
---|
752 | |
---|
753 | /// \name Using previously constructed node or arc set |
---|
754 | /// @{ |
---|
755 | |
---|
756 | /// \brief Use previously constructed node set |
---|
757 | /// |
---|
758 | /// Use previously constructed node set, and specify the node |
---|
759 | /// label map. |
---|
760 | template <typename Map> |
---|
761 | DigraphReader& useNodes(const Map& map) { |
---|
762 | checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>(); |
---|
763 | LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); |
---|
764 | _use_nodes = true; |
---|
765 | _writer_bits::DefaultConverter<typename Map::Value> converter; |
---|
766 | for (NodeIt n(_digraph); n != INVALID; ++n) { |
---|
767 | _node_index.insert(std::make_pair(converter(map[n]), n)); |
---|
768 | } |
---|
769 | return *this; |
---|
770 | } |
---|
771 | |
---|
772 | /// \brief Use previously constructed node set |
---|
773 | /// |
---|
774 | /// Use previously constructed node set, and specify the node |
---|
775 | /// label map and a functor which converts the label map values to |
---|
776 | /// \c std::string. |
---|
777 | template <typename Map, typename Converter> |
---|
778 | DigraphReader& useNodes(const Map& map, |
---|
779 | const Converter& converter = Converter()) { |
---|
780 | checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>(); |
---|
781 | LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); |
---|
782 | _use_nodes = true; |
---|
783 | for (NodeIt n(_digraph); n != INVALID; ++n) { |
---|
784 | _node_index.insert(std::make_pair(converter(map[n]), n)); |
---|
785 | } |
---|
786 | return *this; |
---|
787 | } |
---|
788 | |
---|
789 | /// \brief Use previously constructed arc set |
---|
790 | /// |
---|
791 | /// Use previously constructed arc set, and specify the arc |
---|
792 | /// label map. |
---|
793 | template <typename Map> |
---|
794 | DigraphReader& useArcs(const Map& map) { |
---|
795 | checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>(); |
---|
796 | LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member"); |
---|
797 | _use_arcs = true; |
---|
798 | _writer_bits::DefaultConverter<typename Map::Value> converter; |
---|
799 | for (ArcIt a(_digraph); a != INVALID; ++a) { |
---|
800 | _arc_index.insert(std::make_pair(converter(map[a]), a)); |
---|
801 | } |
---|
802 | return *this; |
---|
803 | } |
---|
804 | |
---|
805 | /// \brief Use previously constructed arc set |
---|
806 | /// |
---|
807 | /// Use previously constructed arc set, and specify the arc |
---|
808 | /// label map and a functor which converts the label map values to |
---|
809 | /// \c std::string. |
---|
810 | template <typename Map, typename Converter> |
---|
811 | DigraphReader& useArcs(const Map& map, |
---|
812 | const Converter& converter = Converter()) { |
---|
813 | checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>(); |
---|
814 | LEMON_ASSERT(!_use_arcs, "Multiple usage of useArcs() member"); |
---|
815 | _use_arcs = true; |
---|
816 | for (ArcIt a(_digraph); a != INVALID; ++a) { |
---|
817 | _arc_index.insert(std::make_pair(converter(map[a]), a)); |
---|
818 | } |
---|
819 | return *this; |
---|
820 | } |
---|
821 | |
---|
822 | /// \brief Skips the reading of node section |
---|
823 | /// |
---|
824 | /// Omit the reading of the node section. This implies that each node |
---|
825 | /// map reading rule will be abandoned, and the nodes of the graph |
---|
826 | /// will not be constructed, which usually cause that the arc set |
---|
827 | /// could not be read due to lack of node name resolving. |
---|
828 | /// Therefore \c skipArcs() function should also be used, or |
---|
829 | /// \c useNodes() should be used to specify the label of the nodes. |
---|
830 | DigraphReader& skipNodes() { |
---|
831 | LEMON_ASSERT(!_skip_nodes, "Skip nodes already set"); |
---|
832 | _skip_nodes = true; |
---|
833 | return *this; |
---|
834 | } |
---|
835 | |
---|
836 | /// \brief Skips the reading of arc section |
---|
837 | /// |
---|
838 | /// Omit the reading of the arc section. This implies that each arc |
---|
839 | /// map reading rule will be abandoned, and the arcs of the graph |
---|
840 | /// will not be constructed. |
---|
841 | DigraphReader& skipArcs() { |
---|
842 | LEMON_ASSERT(!_skip_arcs, "Skip arcs already set"); |
---|
843 | _skip_arcs = true; |
---|
844 | return *this; |
---|
845 | } |
---|
846 | |
---|
847 | /// @} |
---|
848 | |
---|
849 | private: |
---|
850 | |
---|
851 | bool readLine() { |
---|
852 | std::string str; |
---|
853 | while(++line_num, std::getline(*_is, str)) { |
---|
854 | line.clear(); line.str(str); |
---|
855 | char c; |
---|
856 | if (line >> std::ws >> c && c != '#') { |
---|
857 | line.putback(c); |
---|
858 | return true; |
---|
859 | } |
---|
860 | } |
---|
861 | return false; |
---|
862 | } |
---|
863 | |
---|
864 | bool readSuccess() { |
---|
865 | return static_cast<bool>(*_is); |
---|
866 | } |
---|
867 | |
---|
868 | void skipSection() { |
---|
869 | char c; |
---|
870 | while (readSuccess() && line >> c && c != '@') { |
---|
871 | readLine(); |
---|
872 | } |
---|
873 | line.putback(c); |
---|
874 | } |
---|
875 | |
---|
876 | void readNodes() { |
---|
877 | |
---|
878 | std::vector<int> map_index(_node_maps.size()); |
---|
879 | int map_num, label_index; |
---|
880 | |
---|
881 | char c; |
---|
882 | if (!readLine() || !(line >> c) || c == '@') { |
---|
883 | if (readSuccess() && line) line.putback(c); |
---|
884 | if (!_node_maps.empty()) |
---|
885 | throw FormatError("Cannot find map names"); |
---|
886 | return; |
---|
887 | } |
---|
888 | line.putback(c); |
---|
889 | |
---|
890 | { |
---|
891 | std::map<std::string, int> maps; |
---|
892 | |
---|
893 | std::string map; |
---|
894 | int index = 0; |
---|
895 | while (_reader_bits::readToken(line, map)) { |
---|
896 | if (maps.find(map) != maps.end()) { |
---|
897 | std::ostringstream msg; |
---|
898 | msg << "Multiple occurence of node map: " << map; |
---|
899 | throw FormatError(msg.str()); |
---|
900 | } |
---|
901 | maps.insert(std::make_pair(map, index)); |
---|
902 | ++index; |
---|
903 | } |
---|
904 | |
---|
905 | for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) { |
---|
906 | std::map<std::string, int>::iterator jt = |
---|
907 | maps.find(_node_maps[i].first); |
---|
908 | if (jt == maps.end()) { |
---|
909 | std::ostringstream msg; |
---|
910 | msg << "Map not found: " << _node_maps[i].first; |
---|
911 | throw FormatError(msg.str()); |
---|
912 | } |
---|
913 | map_index[i] = jt->second; |
---|
914 | } |
---|
915 | |
---|
916 | { |
---|
917 | std::map<std::string, int>::iterator jt = maps.find("label"); |
---|
918 | if (jt != maps.end()) { |
---|
919 | label_index = jt->second; |
---|
920 | } else { |
---|
921 | label_index = -1; |
---|
922 | } |
---|
923 | } |
---|
924 | map_num = maps.size(); |
---|
925 | } |
---|
926 | |
---|
927 | while (readLine() && line >> c && c != '@') { |
---|
928 | line.putback(c); |
---|
929 | |
---|
930 | std::vector<std::string> tokens(map_num); |
---|
931 | for (int i = 0; i < map_num; ++i) { |
---|
932 | if (!_reader_bits::readToken(line, tokens[i])) { |
---|
933 | std::ostringstream msg; |
---|
934 | msg << "Column not found (" << i + 1 << ")"; |
---|
935 | throw FormatError(msg.str()); |
---|
936 | } |
---|
937 | } |
---|
938 | if (line >> std::ws >> c) |
---|
939 | throw FormatError("Extra character at the end of line"); |
---|
940 | |
---|
941 | Node n; |
---|
942 | if (!_use_nodes) { |
---|
943 | n = _digraph.addNode(); |
---|
944 | if (label_index != -1) |
---|
945 | _node_index.insert(std::make_pair(tokens[label_index], n)); |
---|
946 | } else { |
---|
947 | if (label_index == -1) |
---|
948 | throw FormatError("Label map not found"); |
---|
949 | typename std::map<std::string, Node>::iterator it = |
---|
950 | _node_index.find(tokens[label_index]); |
---|
951 | if (it == _node_index.end()) { |
---|
952 | std::ostringstream msg; |
---|
953 | msg << "Node with label not found: " << tokens[label_index]; |
---|
954 | throw FormatError(msg.str()); |
---|
955 | } |
---|
956 | n = it->second; |
---|
957 | } |
---|
958 | |
---|
959 | for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) { |
---|
960 | _node_maps[i].second->set(n, tokens[map_index[i]]); |
---|
961 | } |
---|
962 | |
---|
963 | } |
---|
964 | if (readSuccess()) { |
---|
965 | line.putback(c); |
---|
966 | } |
---|
967 | } |
---|
968 | |
---|
969 | void readArcs() { |
---|
970 | |
---|
971 | std::vector<int> map_index(_arc_maps.size()); |
---|
972 | int map_num, label_index; |
---|
973 | |
---|
974 | char c; |
---|
975 | if (!readLine() || !(line >> c) || c == '@') { |
---|
976 | if (readSuccess() && line) line.putback(c); |
---|
977 | if (!_arc_maps.empty()) |
---|
978 | throw FormatError("Cannot find map names"); |
---|
979 | return; |
---|
980 | } |
---|
981 | line.putback(c); |
---|
982 | |
---|
983 | { |
---|
984 | std::map<std::string, int> maps; |
---|
985 | |
---|
986 | std::string map; |
---|
987 | int index = 0; |
---|
988 | while (_reader_bits::readToken(line, map)) { |
---|
989 | if (maps.find(map) != maps.end()) { |
---|
990 | std::ostringstream msg; |
---|
991 | msg << "Multiple occurence of arc map: " << map; |
---|
992 | throw FormatError(msg.str()); |
---|
993 | } |
---|
994 | maps.insert(std::make_pair(map, index)); |
---|
995 | ++index; |
---|
996 | } |
---|
997 | |
---|
998 | for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) { |
---|
999 | std::map<std::string, int>::iterator jt = |
---|
1000 | maps.find(_arc_maps[i].first); |
---|
1001 | if (jt == maps.end()) { |
---|
1002 | std::ostringstream msg; |
---|
1003 | msg << "Map not found: " << _arc_maps[i].first; |
---|
1004 | throw FormatError(msg.str()); |
---|
1005 | } |
---|
1006 | map_index[i] = jt->second; |
---|
1007 | } |
---|
1008 | |
---|
1009 | { |
---|
1010 | std::map<std::string, int>::iterator jt = maps.find("label"); |
---|
1011 | if (jt != maps.end()) { |
---|
1012 | label_index = jt->second; |
---|
1013 | } else { |
---|
1014 | label_index = -1; |
---|
1015 | } |
---|
1016 | } |
---|
1017 | map_num = maps.size(); |
---|
1018 | } |
---|
1019 | |
---|
1020 | while (readLine() && line >> c && c != '@') { |
---|
1021 | line.putback(c); |
---|
1022 | |
---|
1023 | std::string source_token; |
---|
1024 | std::string target_token; |
---|
1025 | |
---|
1026 | if (!_reader_bits::readToken(line, source_token)) |
---|
1027 | throw FormatError("Source not found"); |
---|
1028 | |
---|
1029 | if (!_reader_bits::readToken(line, target_token)) |
---|
1030 | throw FormatError("Target not found"); |
---|
1031 | |
---|
1032 | std::vector<std::string> tokens(map_num); |
---|
1033 | for (int i = 0; i < map_num; ++i) { |
---|
1034 | if (!_reader_bits::readToken(line, tokens[i])) { |
---|
1035 | std::ostringstream msg; |
---|
1036 | msg << "Column not found (" << i + 1 << ")"; |
---|
1037 | throw FormatError(msg.str()); |
---|
1038 | } |
---|
1039 | } |
---|
1040 | if (line >> std::ws >> c) |
---|
1041 | throw FormatError("Extra character at the end of line"); |
---|
1042 | |
---|
1043 | Arc a; |
---|
1044 | if (!_use_arcs) { |
---|
1045 | |
---|
1046 | typename NodeIndex::iterator it; |
---|
1047 | |
---|
1048 | it = _node_index.find(source_token); |
---|
1049 | if (it == _node_index.end()) { |
---|
1050 | std::ostringstream msg; |
---|
1051 | msg << "Item not found: " << source_token; |
---|
1052 | throw FormatError(msg.str()); |
---|
1053 | } |
---|
1054 | Node source = it->second; |
---|
1055 | |
---|
1056 | it = _node_index.find(target_token); |
---|
1057 | if (it == _node_index.end()) { |
---|
1058 | std::ostringstream msg; |
---|
1059 | msg << "Item not found: " << target_token; |
---|
1060 | throw FormatError(msg.str()); |
---|
1061 | } |
---|
1062 | Node target = it->second; |
---|
1063 | |
---|
1064 | a = _digraph.addArc(source, target); |
---|
1065 | if (label_index != -1) |
---|
1066 | _arc_index.insert(std::make_pair(tokens[label_index], a)); |
---|
1067 | } else { |
---|
1068 | if (label_index == -1) |
---|
1069 | throw FormatError("Label map not found"); |
---|
1070 | typename std::map<std::string, Arc>::iterator it = |
---|
1071 | _arc_index.find(tokens[label_index]); |
---|
1072 | if (it == _arc_index.end()) { |
---|
1073 | std::ostringstream msg; |
---|
1074 | msg << "Arc with label not found: " << tokens[label_index]; |
---|
1075 | throw FormatError(msg.str()); |
---|
1076 | } |
---|
1077 | a = it->second; |
---|
1078 | } |
---|
1079 | |
---|
1080 | for (int i = 0; i < static_cast<int>(_arc_maps.size()); ++i) { |
---|
1081 | _arc_maps[i].second->set(a, tokens[map_index[i]]); |
---|
1082 | } |
---|
1083 | |
---|
1084 | } |
---|
1085 | if (readSuccess()) { |
---|
1086 | line.putback(c); |
---|
1087 | } |
---|
1088 | } |
---|
1089 | |
---|
1090 | void readAttributes() { |
---|
1091 | |
---|
1092 | std::set<std::string> read_attr; |
---|
1093 | |
---|
1094 | char c; |
---|
1095 | while (readLine() && line >> c && c != '@') { |
---|
1096 | line.putback(c); |
---|
1097 | |
---|
1098 | std::string attr, token; |
---|
1099 | if (!_reader_bits::readToken(line, attr)) |
---|
1100 | throw FormatError("Attribute name not found"); |
---|
1101 | if (!_reader_bits::readToken(line, token)) |
---|
1102 | throw FormatError("Attribute value not found"); |
---|
1103 | if (line >> c) |
---|
1104 | throw FormatError("Extra character at the end of line"); |
---|
1105 | |
---|
1106 | { |
---|
1107 | std::set<std::string>::iterator it = read_attr.find(attr); |
---|
1108 | if (it != read_attr.end()) { |
---|
1109 | std::ostringstream msg; |
---|
1110 | msg << "Multiple occurence of attribute: " << attr; |
---|
1111 | throw FormatError(msg.str()); |
---|
1112 | } |
---|
1113 | read_attr.insert(attr); |
---|
1114 | } |
---|
1115 | |
---|
1116 | { |
---|
1117 | typename Attributes::iterator it = _attributes.lower_bound(attr); |
---|
1118 | while (it != _attributes.end() && it->first == attr) { |
---|
1119 | it->second->set(token); |
---|
1120 | ++it; |
---|
1121 | } |
---|
1122 | } |
---|
1123 | |
---|
1124 | } |
---|
1125 | if (readSuccess()) { |
---|
1126 | line.putback(c); |
---|
1127 | } |
---|
1128 | for (typename Attributes::iterator it = _attributes.begin(); |
---|
1129 | it != _attributes.end(); ++it) { |
---|
1130 | if (read_attr.find(it->first) == read_attr.end()) { |
---|
1131 | std::ostringstream msg; |
---|
1132 | msg << "Attribute not found: " << it->first; |
---|
1133 | throw FormatError(msg.str()); |
---|
1134 | } |
---|
1135 | } |
---|
1136 | } |
---|
1137 | |
---|
1138 | public: |
---|
1139 | |
---|
1140 | /// \name Execution of the reader |
---|
1141 | /// @{ |
---|
1142 | |
---|
1143 | /// \brief Start the batch processing |
---|
1144 | /// |
---|
1145 | /// This function starts the batch processing |
---|
1146 | void run() { |
---|
1147 | LEMON_ASSERT(_is != 0, "This reader assigned to an other reader"); |
---|
1148 | |
---|
1149 | bool nodes_done = _skip_nodes; |
---|
1150 | bool arcs_done = _skip_arcs; |
---|
1151 | bool attributes_done = false; |
---|
1152 | |
---|
1153 | line_num = 0; |
---|
1154 | readLine(); |
---|
1155 | skipSection(); |
---|
1156 | |
---|
1157 | while (readSuccess()) { |
---|
1158 | try { |
---|
1159 | char c; |
---|
1160 | std::string section, caption; |
---|
1161 | line >> c; |
---|
1162 | _reader_bits::readToken(line, section); |
---|
1163 | _reader_bits::readToken(line, caption); |
---|
1164 | |
---|
1165 | if (line >> c) |
---|
1166 | throw FormatError("Extra character at the end of line"); |
---|
1167 | |
---|
1168 | if (section == "nodes" && !nodes_done) { |
---|
1169 | if (_nodes_caption.empty() || _nodes_caption == caption) { |
---|
1170 | readNodes(); |
---|
1171 | nodes_done = true; |
---|
1172 | } |
---|
1173 | } else if ((section == "arcs" || section == "edges") && |
---|
1174 | !arcs_done) { |
---|
1175 | if (_arcs_caption.empty() || _arcs_caption == caption) { |
---|
1176 | readArcs(); |
---|
1177 | arcs_done = true; |
---|
1178 | } |
---|
1179 | } else if (section == "attributes" && !attributes_done) { |
---|
1180 | if (_attributes_caption.empty() || _attributes_caption == caption) { |
---|
1181 | readAttributes(); |
---|
1182 | attributes_done = true; |
---|
1183 | } |
---|
1184 | } else { |
---|
1185 | readLine(); |
---|
1186 | skipSection(); |
---|
1187 | } |
---|
1188 | } catch (FormatError& error) { |
---|
1189 | error.line(line_num); |
---|
1190 | error.file(_filename); |
---|
1191 | throw; |
---|
1192 | } |
---|
1193 | } |
---|
1194 | |
---|
1195 | if (!nodes_done) { |
---|
1196 | throw FormatError("Section @nodes not found"); |
---|
1197 | } |
---|
1198 | |
---|
1199 | if (!arcs_done) { |
---|
1200 | throw FormatError("Section @arcs not found"); |
---|
1201 | } |
---|
1202 | |
---|
1203 | if (!attributes_done && !_attributes.empty()) { |
---|
1204 | throw FormatError("Section @attributes not found"); |
---|
1205 | } |
---|
1206 | |
---|
1207 | } |
---|
1208 | |
---|
1209 | /// @} |
---|
1210 | |
---|
1211 | }; |
---|
1212 | |
---|
1213 | template <typename Graph> |
---|
1214 | class GraphReader; |
---|
1215 | |
---|
1216 | /// \brief Return a \ref GraphReader class |
---|
1217 | /// |
---|
1218 | /// This function just returns a \ref GraphReader class. |
---|
1219 | /// \relates GraphReader |
---|
1220 | template <typename Graph> |
---|
1221 | GraphReader<Graph> graphReader(Graph& graph, std::istream& is = std::cin) { |
---|
1222 | GraphReader<Graph> tmp(graph, is); |
---|
1223 | return tmp; |
---|
1224 | } |
---|
1225 | |
---|
1226 | /// \brief Return a \ref GraphReader class |
---|
1227 | /// |
---|
1228 | /// This function just returns a \ref GraphReader class. |
---|
1229 | /// \relates GraphReader |
---|
1230 | template <typename Graph> |
---|
1231 | GraphReader<Graph> graphReader(Graph& graph, const std::string& fn) { |
---|
1232 | GraphReader<Graph> tmp(graph, fn); |
---|
1233 | return tmp; |
---|
1234 | } |
---|
1235 | |
---|
1236 | /// \brief Return a \ref GraphReader class |
---|
1237 | /// |
---|
1238 | /// This function just returns a \ref GraphReader class. |
---|
1239 | /// \relates GraphReader |
---|
1240 | template <typename Graph> |
---|
1241 | GraphReader<Graph> graphReader(Graph& graph, const char* fn) { |
---|
1242 | GraphReader<Graph> tmp(graph, fn); |
---|
1243 | return tmp; |
---|
1244 | } |
---|
1245 | |
---|
1246 | /// \ingroup lemon_io |
---|
1247 | /// |
---|
1248 | /// \brief \ref lgf-format "LGF" reader for undirected graphs |
---|
1249 | /// |
---|
1250 | /// This utility reads an \ref lgf-format "LGF" file. |
---|
1251 | /// |
---|
1252 | /// It can be used almost the same way as \c DigraphReader. |
---|
1253 | /// The only difference is that this class can handle edges and |
---|
1254 | /// edge maps as well as arcs and arc maps. |
---|
1255 | /// |
---|
1256 | /// The columns in the \c \@edges (or \c \@arcs) section are the |
---|
1257 | /// edge maps. However, if there are two maps with the same name |
---|
1258 | /// prefixed with \c '+' and \c '-', then these can be read into an |
---|
1259 | /// arc map. Similarly, an attribute can be read into an arc, if |
---|
1260 | /// it's value is an edge label prefixed with \c '+' or \c '-'. |
---|
1261 | template <typename _Graph> |
---|
1262 | class GraphReader { |
---|
1263 | public: |
---|
1264 | |
---|
1265 | typedef _Graph Graph; |
---|
1266 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
---|
1267 | |
---|
1268 | private: |
---|
1269 | |
---|
1270 | std::istream* _is; |
---|
1271 | bool local_is; |
---|
1272 | std::string _filename; |
---|
1273 | |
---|
1274 | Graph& _graph; |
---|
1275 | |
---|
1276 | std::string _nodes_caption; |
---|
1277 | std::string _edges_caption; |
---|
1278 | std::string _attributes_caption; |
---|
1279 | |
---|
1280 | typedef std::map<std::string, Node> NodeIndex; |
---|
1281 | NodeIndex _node_index; |
---|
1282 | typedef std::map<std::string, Edge> EdgeIndex; |
---|
1283 | EdgeIndex _edge_index; |
---|
1284 | |
---|
1285 | typedef std::vector<std::pair<std::string, |
---|
1286 | _reader_bits::MapStorageBase<Node>*> > NodeMaps; |
---|
1287 | NodeMaps _node_maps; |
---|
1288 | |
---|
1289 | typedef std::vector<std::pair<std::string, |
---|
1290 | _reader_bits::MapStorageBase<Edge>*> > EdgeMaps; |
---|
1291 | EdgeMaps _edge_maps; |
---|
1292 | |
---|
1293 | typedef std::multimap<std::string, _reader_bits::ValueStorageBase*> |
---|
1294 | Attributes; |
---|
1295 | Attributes _attributes; |
---|
1296 | |
---|
1297 | bool _use_nodes; |
---|
1298 | bool _use_edges; |
---|
1299 | |
---|
1300 | bool _skip_nodes; |
---|
1301 | bool _skip_edges; |
---|
1302 | |
---|
1303 | int line_num; |
---|
1304 | std::istringstream line; |
---|
1305 | |
---|
1306 | public: |
---|
1307 | |
---|
1308 | /// \brief Constructor |
---|
1309 | /// |
---|
1310 | /// Construct an undirected graph reader, which reads from the given |
---|
1311 | /// input stream. |
---|
1312 | GraphReader(Graph& graph, std::istream& is = std::cin) |
---|
1313 | : _is(&is), local_is(false), _graph(graph), |
---|
1314 | _use_nodes(false), _use_edges(false), |
---|
1315 | _skip_nodes(false), _skip_edges(false) {} |
---|
1316 | |
---|
1317 | /// \brief Constructor |
---|
1318 | /// |
---|
1319 | /// Construct an undirected graph reader, which reads from the given |
---|
1320 | /// file. |
---|
1321 | GraphReader(Graph& graph, const std::string& fn) |
---|
1322 | : _is(new std::ifstream(fn.c_str())), local_is(true), |
---|
1323 | _filename(fn), _graph(graph), |
---|
1324 | _use_nodes(false), _use_edges(false), |
---|
1325 | _skip_nodes(false), _skip_edges(false) { |
---|
1326 | if (!(*_is)) { |
---|
1327 | delete _is; |
---|
1328 | throw IoError("Cannot open file", fn); |
---|
1329 | } |
---|
1330 | } |
---|
1331 | |
---|
1332 | /// \brief Constructor |
---|
1333 | /// |
---|
1334 | /// Construct an undirected graph reader, which reads from the given |
---|
1335 | /// file. |
---|
1336 | GraphReader(Graph& graph, const char* fn) |
---|
1337 | : _is(new std::ifstream(fn)), local_is(true), |
---|
1338 | _filename(fn), _graph(graph), |
---|
1339 | _use_nodes(false), _use_edges(false), |
---|
1340 | _skip_nodes(false), _skip_edges(false) { |
---|
1341 | if (!(*_is)) { |
---|
1342 | delete _is; |
---|
1343 | throw IoError("Cannot open file", fn); |
---|
1344 | } |
---|
1345 | } |
---|
1346 | |
---|
1347 | /// \brief Destructor |
---|
1348 | ~GraphReader() { |
---|
1349 | for (typename NodeMaps::iterator it = _node_maps.begin(); |
---|
1350 | it != _node_maps.end(); ++it) { |
---|
1351 | delete it->second; |
---|
1352 | } |
---|
1353 | |
---|
1354 | for (typename EdgeMaps::iterator it = _edge_maps.begin(); |
---|
1355 | it != _edge_maps.end(); ++it) { |
---|
1356 | delete it->second; |
---|
1357 | } |
---|
1358 | |
---|
1359 | for (typename Attributes::iterator it = _attributes.begin(); |
---|
1360 | it != _attributes.end(); ++it) { |
---|
1361 | delete it->second; |
---|
1362 | } |
---|
1363 | |
---|
1364 | if (local_is) { |
---|
1365 | delete _is; |
---|
1366 | } |
---|
1367 | |
---|
1368 | } |
---|
1369 | |
---|
1370 | private: |
---|
1371 | friend GraphReader<Graph> graphReader<>(Graph& graph, std::istream& is); |
---|
1372 | friend GraphReader<Graph> graphReader<>(Graph& graph, |
---|
1373 | const std::string& fn); |
---|
1374 | friend GraphReader<Graph> graphReader<>(Graph& graph, const char *fn); |
---|
1375 | |
---|
1376 | GraphReader(GraphReader& other) |
---|
1377 | : _is(other._is), local_is(other.local_is), _graph(other._graph), |
---|
1378 | _use_nodes(other._use_nodes), _use_edges(other._use_edges), |
---|
1379 | _skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) { |
---|
1380 | |
---|
1381 | other._is = 0; |
---|
1382 | other.local_is = false; |
---|
1383 | |
---|
1384 | _node_index.swap(other._node_index); |
---|
1385 | _edge_index.swap(other._edge_index); |
---|
1386 | |
---|
1387 | _node_maps.swap(other._node_maps); |
---|
1388 | _edge_maps.swap(other._edge_maps); |
---|
1389 | _attributes.swap(other._attributes); |
---|
1390 | |
---|
1391 | _nodes_caption = other._nodes_caption; |
---|
1392 | _edges_caption = other._edges_caption; |
---|
1393 | _attributes_caption = other._attributes_caption; |
---|
1394 | |
---|
1395 | } |
---|
1396 | |
---|
1397 | GraphReader& operator=(const GraphReader&); |
---|
1398 | |
---|
1399 | public: |
---|
1400 | |
---|
1401 | /// \name Reading rules |
---|
1402 | /// @{ |
---|
1403 | |
---|
1404 | /// \brief Node map reading rule |
---|
1405 | /// |
---|
1406 | /// Add a node map reading rule to the reader. |
---|
1407 | template <typename Map> |
---|
1408 | GraphReader& nodeMap(const std::string& caption, Map& map) { |
---|
1409 | checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>(); |
---|
1410 | _reader_bits::MapStorageBase<Node>* storage = |
---|
1411 | new _reader_bits::MapStorage<Node, Map>(map); |
---|
1412 | _node_maps.push_back(std::make_pair(caption, storage)); |
---|
1413 | return *this; |
---|
1414 | } |
---|
1415 | |
---|
1416 | /// \brief Node map reading rule |
---|
1417 | /// |
---|
1418 | /// Add a node map reading rule with specialized converter to the |
---|
1419 | /// reader. |
---|
1420 | template <typename Map, typename Converter> |
---|
1421 | GraphReader& nodeMap(const std::string& caption, Map& map, |
---|
1422 | const Converter& converter = Converter()) { |
---|
1423 | checkConcept<concepts::WriteMap<Node, typename Map::Value>, Map>(); |
---|
1424 | _reader_bits::MapStorageBase<Node>* storage = |
---|
1425 | new _reader_bits::MapStorage<Node, Map, Converter>(map, converter); |
---|
1426 | _node_maps.push_back(std::make_pair(caption, storage)); |
---|
1427 | return *this; |
---|
1428 | } |
---|
1429 | |
---|
1430 | /// \brief Edge map reading rule |
---|
1431 | /// |
---|
1432 | /// Add an edge map reading rule to the reader. |
---|
1433 | template <typename Map> |
---|
1434 | GraphReader& edgeMap(const std::string& caption, Map& map) { |
---|
1435 | checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>(); |
---|
1436 | _reader_bits::MapStorageBase<Edge>* storage = |
---|
1437 | new _reader_bits::MapStorage<Edge, Map>(map); |
---|
1438 | _edge_maps.push_back(std::make_pair(caption, storage)); |
---|
1439 | return *this; |
---|
1440 | } |
---|
1441 | |
---|
1442 | /// \brief Edge map reading rule |
---|
1443 | /// |
---|
1444 | /// Add an edge map reading rule with specialized converter to the |
---|
1445 | /// reader. |
---|
1446 | template <typename Map, typename Converter> |
---|
1447 | GraphReader& edgeMap(const std::string& caption, Map& map, |
---|
1448 | const Converter& converter = Converter()) { |
---|
1449 | checkConcept<concepts::WriteMap<Edge, typename Map::Value>, Map>(); |
---|
1450 | _reader_bits::MapStorageBase<Edge>* storage = |
---|
1451 | new _reader_bits::MapStorage<Edge, Map, Converter>(map, converter); |
---|
1452 | _edge_maps.push_back(std::make_pair(caption, storage)); |
---|
1453 | return *this; |
---|
1454 | } |
---|
1455 | |
---|
1456 | /// \brief Arc map reading rule |
---|
1457 | /// |
---|
1458 | /// Add an arc map reading rule to the reader. |
---|
1459 | template <typename Map> |
---|
1460 | GraphReader& arcMap(const std::string& caption, Map& map) { |
---|
1461 | checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>(); |
---|
1462 | _reader_bits::MapStorageBase<Edge>* forward_storage = |
---|
1463 | new _reader_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map); |
---|
1464 | _edge_maps.push_back(std::make_pair('+' + caption, forward_storage)); |
---|
1465 | _reader_bits::MapStorageBase<Edge>* backward_storage = |
---|
1466 | new _reader_bits::GraphArcMapStorage<Graph, false, Map>(_graph, map); |
---|
1467 | _edge_maps.push_back(std::make_pair('-' + caption, backward_storage)); |
---|
1468 | return *this; |
---|
1469 | } |
---|
1470 | |
---|
1471 | /// \brief Arc map reading rule |
---|
1472 | /// |
---|
1473 | /// Add an arc map reading rule with specialized converter to the |
---|
1474 | /// reader. |
---|
1475 | template <typename Map, typename Converter> |
---|
1476 | GraphReader& arcMap(const std::string& caption, Map& map, |
---|
1477 | const Converter& converter = Converter()) { |
---|
1478 | checkConcept<concepts::WriteMap<Arc, typename Map::Value>, Map>(); |
---|
1479 | _reader_bits::MapStorageBase<Edge>* forward_storage = |
---|
1480 | new _reader_bits::GraphArcMapStorage<Graph, true, Map, Converter> |
---|
1481 | (_graph, map, converter); |
---|
1482 | _edge_maps.push_back(std::make_pair('+' + caption, forward_storage)); |
---|
1483 | _reader_bits::MapStorageBase<Edge>* backward_storage = |
---|
1484 | new _reader_bits::GraphArcMapStorage<Graph, false, Map, Converter> |
---|
1485 | (_graph, map, converter); |
---|
1486 | _edge_maps.push_back(std::make_pair('-' + caption, backward_storage)); |
---|
1487 | return *this; |
---|
1488 | } |
---|
1489 | |
---|
1490 | /// \brief Attribute reading rule |
---|
1491 | /// |
---|
1492 | /// Add an attribute reading rule to the reader. |
---|
1493 | template <typename Value> |
---|
1494 | GraphReader& attribute(const std::string& caption, Value& value) { |
---|
1495 | _reader_bits::ValueStorageBase* storage = |
---|
1496 | new _reader_bits::ValueStorage<Value>(value); |
---|
1497 | _attributes.insert(std::make_pair(caption, storage)); |
---|
1498 | return *this; |
---|
1499 | } |
---|
1500 | |
---|
1501 | /// \brief Attribute reading rule |
---|
1502 | /// |
---|
1503 | /// Add an attribute reading rule with specialized converter to the |
---|
1504 | /// reader. |
---|
1505 | template <typename Value, typename Converter> |
---|
1506 | GraphReader& attribute(const std::string& caption, Value& value, |
---|
1507 | const Converter& converter = Converter()) { |
---|
1508 | _reader_bits::ValueStorageBase* storage = |
---|
1509 | new _reader_bits::ValueStorage<Value, Converter>(value, converter); |
---|
1510 | _attributes.insert(std::make_pair(caption, storage)); |
---|
1511 | return *this; |
---|
1512 | } |
---|
1513 | |
---|
1514 | /// \brief Node reading rule |
---|
1515 | /// |
---|
1516 | /// Add a node reading rule to reader. |
---|
1517 | GraphReader& node(const std::string& caption, Node& node) { |
---|
1518 | typedef _reader_bits::MapLookUpConverter<Node> Converter; |
---|
1519 | Converter converter(_node_index); |
---|
1520 | _reader_bits::ValueStorageBase* storage = |
---|
1521 | new _reader_bits::ValueStorage<Node, Converter>(node, converter); |
---|
1522 | _attributes.insert(std::make_pair(caption, storage)); |
---|
1523 | return *this; |
---|
1524 | } |
---|
1525 | |
---|
1526 | /// \brief Edge reading rule |
---|
1527 | /// |
---|
1528 | /// Add an edge reading rule to reader. |
---|
1529 | GraphReader& edge(const std::string& caption, Edge& edge) { |
---|
1530 | typedef _reader_bits::MapLookUpConverter<Edge> Converter; |
---|
1531 | Converter converter(_edge_index); |
---|
1532 | _reader_bits::ValueStorageBase* storage = |
---|
1533 | new _reader_bits::ValueStorage<Edge, Converter>(edge, converter); |
---|
1534 | _attributes.insert(std::make_pair(caption, storage)); |
---|
1535 | return *this; |
---|
1536 | } |
---|
1537 | |
---|
1538 | /// \brief Arc reading rule |
---|
1539 | /// |
---|
1540 | /// Add an arc reading rule to reader. |
---|
1541 | GraphReader& arc(const std::string& caption, Arc& arc) { |
---|
1542 | typedef _reader_bits::GraphArcLookUpConverter<Graph> Converter; |
---|
1543 | Converter converter(_graph, _edge_index); |
---|
1544 | _reader_bits::ValueStorageBase* storage = |
---|
1545 | new _reader_bits::ValueStorage<Arc, Converter>(arc, converter); |
---|
1546 | _attributes.insert(std::make_pair(caption, storage)); |
---|
1547 | return *this; |
---|
1548 | } |
---|
1549 | |
---|
1550 | /// @} |
---|
1551 | |
---|
1552 | /// \name Select section by name |
---|
1553 | /// @{ |
---|
1554 | |
---|
1555 | /// \brief Set \c \@nodes section to be read |
---|
1556 | /// |
---|
1557 | /// Set \c \@nodes section to be read. |
---|
1558 | GraphReader& nodes(const std::string& caption) { |
---|
1559 | _nodes_caption = caption; |
---|
1560 | return *this; |
---|
1561 | } |
---|
1562 | |
---|
1563 | /// \brief Set \c \@edges section to be read |
---|
1564 | /// |
---|
1565 | /// Set \c \@edges section to be read. |
---|
1566 | GraphReader& edges(const std::string& caption) { |
---|
1567 | _edges_caption = caption; |
---|
1568 | return *this; |
---|
1569 | } |
---|
1570 | |
---|
1571 | /// \brief Set \c \@attributes section to be read |
---|
1572 | /// |
---|
1573 | /// Set \c \@attributes section to be read. |
---|
1574 | GraphReader& attributes(const std::string& caption) { |
---|
1575 | _attributes_caption = caption; |
---|
1576 | return *this; |
---|
1577 | } |
---|
1578 | |
---|
1579 | /// @} |
---|
1580 | |
---|
1581 | /// \name Using previously constructed node or edge set |
---|
1582 | /// @{ |
---|
1583 | |
---|
1584 | /// \brief Use previously constructed node set |
---|
1585 | /// |
---|
1586 | /// Use previously constructed node set, and specify the node |
---|
1587 | /// label map. |
---|
1588 | template <typename Map> |
---|
1589 | GraphReader& useNodes(const Map& map) { |
---|
1590 | checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>(); |
---|
1591 | LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); |
---|
1592 | _use_nodes = true; |
---|
1593 | _writer_bits::DefaultConverter<typename Map::Value> converter; |
---|
1594 | for (NodeIt n(_graph); n != INVALID; ++n) { |
---|
1595 | _node_index.insert(std::make_pair(converter(map[n]), n)); |
---|
1596 | } |
---|
1597 | return *this; |
---|
1598 | } |
---|
1599 | |
---|
1600 | /// \brief Use previously constructed node set |
---|
1601 | /// |
---|
1602 | /// Use previously constructed node set, and specify the node |
---|
1603 | /// label map and a functor which converts the label map values to |
---|
1604 | /// \c std::string. |
---|
1605 | template <typename Map, typename Converter> |
---|
1606 | GraphReader& useNodes(const Map& map, |
---|
1607 | const Converter& converter = Converter()) { |
---|
1608 | checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>(); |
---|
1609 | LEMON_ASSERT(!_use_nodes, "Multiple usage of useNodes() member"); |
---|
1610 | _use_nodes = true; |
---|
1611 | for (NodeIt n(_graph); n != INVALID; ++n) { |
---|
1612 | _node_index.insert(std::make_pair(converter(map[n]), n)); |
---|
1613 | } |
---|
1614 | return *this; |
---|
1615 | } |
---|
1616 | |
---|
1617 | /// \brief Use previously constructed edge set |
---|
1618 | /// |
---|
1619 | /// Use previously constructed edge set, and specify the edge |
---|
1620 | /// label map. |
---|
1621 | template <typename Map> |
---|
1622 | GraphReader& useEdges(const Map& map) { |
---|
1623 | checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>(); |
---|
1624 | LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member"); |
---|
1625 | _use_edges = true; |
---|
1626 | _writer_bits::DefaultConverter<typename Map::Value> converter; |
---|
1627 | for (EdgeIt a(_graph); a != INVALID; ++a) { |
---|
1628 | _edge_index.insert(std::make_pair(converter(map[a]), a)); |
---|
1629 | } |
---|
1630 | return *this; |
---|
1631 | } |
---|
1632 | |
---|
1633 | /// \brief Use previously constructed edge set |
---|
1634 | /// |
---|
1635 | /// Use previously constructed edge set, and specify the edge |
---|
1636 | /// label map and a functor which converts the label map values to |
---|
1637 | /// \c std::string. |
---|
1638 | template <typename Map, typename Converter> |
---|
1639 | GraphReader& useEdges(const Map& map, |
---|
1640 | const Converter& converter = Converter()) { |
---|
1641 | checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>(); |
---|
1642 | LEMON_ASSERT(!_use_edges, "Multiple usage of useEdges() member"); |
---|
1643 | _use_edges = true; |
---|
1644 | for (EdgeIt a(_graph); a != INVALID; ++a) { |
---|
1645 | _edge_index.insert(std::make_pair(converter(map[a]), a)); |
---|
1646 | } |
---|
1647 | return *this; |
---|
1648 | } |
---|
1649 | |
---|
1650 | /// \brief Skip the reading of node section |
---|
1651 | /// |
---|
1652 | /// Omit the reading of the node section. This implies that each node |
---|
1653 | /// map reading rule will be abandoned, and the nodes of the graph |
---|
1654 | /// will not be constructed, which usually cause that the edge set |
---|
1655 | /// could not be read due to lack of node name |
---|
1656 | /// could not be read due to lack of node name resolving. |
---|
1657 | /// Therefore \c skipEdges() function should also be used, or |
---|
1658 | /// \c useNodes() should be used to specify the label of the nodes. |
---|
1659 | GraphReader& skipNodes() { |
---|
1660 | LEMON_ASSERT(!_skip_nodes, "Skip nodes already set"); |
---|
1661 | _skip_nodes = true; |
---|
1662 | return *this; |
---|
1663 | } |
---|
1664 | |
---|
1665 | /// \brief Skip the reading of edge section |
---|
1666 | /// |
---|
1667 | /// Omit the reading of the edge section. This implies that each edge |
---|
1668 | /// map reading rule will be abandoned, and the edges of the graph |
---|
1669 | /// will not be constructed. |
---|
1670 | GraphReader& skipEdges() { |
---|
1671 | LEMON_ASSERT(!_skip_edges, "Skip edges already set"); |
---|
1672 | _skip_edges = true; |
---|
1673 | return *this; |
---|
1674 | } |
---|
1675 | |
---|
1676 | /// @} |
---|
1677 | |
---|
1678 | private: |
---|
1679 | |
---|
1680 | bool readLine() { |
---|
1681 | std::string str; |
---|
1682 | while(++line_num, std::getline(*_is, str)) { |
---|
1683 | line.clear(); line.str(str); |
---|
1684 | char c; |
---|
1685 | if (line >> std::ws >> c && c != '#') { |
---|
1686 | line.putback(c); |
---|
1687 | return true; |
---|
1688 | } |
---|
1689 | } |
---|
1690 | return false; |
---|
1691 | } |
---|
1692 | |
---|
1693 | bool readSuccess() { |
---|
1694 | return static_cast<bool>(*_is); |
---|
1695 | } |
---|
1696 | |
---|
1697 | void skipSection() { |
---|
1698 | char c; |
---|
1699 | while (readSuccess() && line >> c && c != '@') { |
---|
1700 | readLine(); |
---|
1701 | } |
---|
1702 | line.putback(c); |
---|
1703 | } |
---|
1704 | |
---|
1705 | void readNodes() { |
---|
1706 | |
---|
1707 | std::vector<int> map_index(_node_maps.size()); |
---|
1708 | int map_num, label_index; |
---|
1709 | |
---|
1710 | char c; |
---|
1711 | if (!readLine() || !(line >> c) || c == '@') { |
---|
1712 | if (readSuccess() && line) line.putback(c); |
---|
1713 | if (!_node_maps.empty()) |
---|
1714 | throw FormatError("Cannot find map names"); |
---|
1715 | return; |
---|
1716 | } |
---|
1717 | line.putback(c); |
---|
1718 | |
---|
1719 | { |
---|
1720 | std::map<std::string, int> maps; |
---|
1721 | |
---|
1722 | std::string map; |
---|
1723 | int index = 0; |
---|
1724 | while (_reader_bits::readToken(line, map)) { |
---|
1725 | if (maps.find(map) != maps.end()) { |
---|
1726 | std::ostringstream msg; |
---|
1727 | msg << "Multiple occurence of node map: " << map; |
---|
1728 | throw FormatError(msg.str()); |
---|
1729 | } |
---|
1730 | maps.insert(std::make_pair(map, index)); |
---|
1731 | ++index; |
---|
1732 | } |
---|
1733 | |
---|
1734 | for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) { |
---|
1735 | std::map<std::string, int>::iterator jt = |
---|
1736 | maps.find(_node_maps[i].first); |
---|
1737 | if (jt == maps.end()) { |
---|
1738 | std::ostringstream msg; |
---|
1739 | msg << "Map not found: " << _node_maps[i].first; |
---|
1740 | throw FormatError(msg.str()); |
---|
1741 | } |
---|
1742 | map_index[i] = jt->second; |
---|
1743 | } |
---|
1744 | |
---|
1745 | { |
---|
1746 | std::map<std::string, int>::iterator jt = maps.find("label"); |
---|
1747 | if (jt != maps.end()) { |
---|
1748 | label_index = jt->second; |
---|
1749 | } else { |
---|
1750 | label_index = -1; |
---|
1751 | } |
---|
1752 | } |
---|
1753 | map_num = maps.size(); |
---|
1754 | } |
---|
1755 | |
---|
1756 | while (readLine() && line >> c && c != '@') { |
---|
1757 | line.putback(c); |
---|
1758 | |
---|
1759 | std::vector<std::string> tokens(map_num); |
---|
1760 | for (int i = 0; i < map_num; ++i) { |
---|
1761 | if (!_reader_bits::readToken(line, tokens[i])) { |
---|
1762 | std::ostringstream msg; |
---|
1763 | msg << "Column not found (" << i + 1 << ")"; |
---|
1764 | throw FormatError(msg.str()); |
---|
1765 | } |
---|
1766 | } |
---|
1767 | if (line >> std::ws >> c) |
---|
1768 | throw FormatError("Extra character at the end of line"); |
---|
1769 | |
---|
1770 | Node n; |
---|
1771 | if (!_use_nodes) { |
---|
1772 | n = _graph.addNode(); |
---|
1773 | if (label_index != -1) |
---|
1774 | _node_index.insert(std::make_pair(tokens[label_index], n)); |
---|
1775 | } else { |
---|
1776 | if (label_index == -1) |
---|
1777 | throw FormatError("Label map not found"); |
---|
1778 | typename std::map<std::string, Node>::iterator it = |
---|
1779 | _node_index.find(tokens[label_index]); |
---|
1780 | if (it == _node_index.end()) { |
---|
1781 | std::ostringstream msg; |
---|
1782 | msg << "Node with label not found: " << tokens[label_index]; |
---|
1783 | throw FormatError(msg.str()); |
---|
1784 | } |
---|
1785 | n = it->second; |
---|
1786 | } |
---|
1787 | |
---|
1788 | for (int i = 0; i < static_cast<int>(_node_maps.size()); ++i) { |
---|
1789 | _node_maps[i].second->set(n, tokens[map_index[i]]); |
---|
1790 | } |
---|
1791 | |
---|
1792 | } |
---|
1793 | if (readSuccess()) { |
---|
1794 | line.putback(c); |
---|
1795 | } |
---|
1796 | } |
---|
1797 | |
---|
1798 | void readEdges() { |
---|
1799 | |
---|
1800 | std::vector<int> map_index(_edge_maps.size()); |
---|
1801 | int map_num, label_index; |
---|
1802 | |
---|
1803 | char c; |
---|
1804 | if (!readLine() || !(line >> c) || c == '@') { |
---|
1805 | if (readSuccess() && line) line.putback(c); |
---|
1806 | if (!_edge_maps.empty()) |
---|
1807 | throw FormatError("Cannot find map names"); |
---|
1808 | return; |
---|
1809 | } |
---|
1810 | line.putback(c); |
---|
1811 | |
---|
1812 | { |
---|
1813 | std::map<std::string, int> maps; |
---|
1814 | |
---|
1815 | std::string map; |
---|
1816 | int index = 0; |
---|
1817 | while (_reader_bits::readToken(line, map)) { |
---|
1818 | if (maps.find(map) != maps.end()) { |
---|
1819 | std::ostringstream msg; |
---|
1820 | msg << "Multiple occurence of edge map: " << map; |
---|
1821 | throw FormatError(msg.str()); |
---|
1822 | } |
---|
1823 | maps.insert(std::make_pair(map, index)); |
---|
1824 | ++index; |
---|
1825 | } |
---|
1826 | |
---|
1827 | for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) { |
---|
1828 | std::map<std::string, int>::iterator jt = |
---|
1829 | maps.find(_edge_maps[i].first); |
---|
1830 | if (jt == maps.end()) { |
---|
1831 | std::ostringstream msg; |
---|
1832 | msg << "Map not found: " << _edge_maps[i].first; |
---|
1833 | throw FormatError(msg.str()); |
---|
1834 | } |
---|
1835 | map_index[i] = jt->second; |
---|
1836 | } |
---|
1837 | |
---|
1838 | { |
---|
1839 | std::map<std::string, int>::iterator jt = maps.find("label"); |
---|
1840 | if (jt != maps.end()) { |
---|
1841 | label_index = jt->second; |
---|
1842 | } else { |
---|
1843 | label_index = -1; |
---|
1844 | } |
---|
1845 | } |
---|
1846 | map_num = maps.size(); |
---|
1847 | } |
---|
1848 | |
---|
1849 | while (readLine() && line >> c && c != '@') { |
---|
1850 | line.putback(c); |
---|
1851 | |
---|
1852 | std::string source_token; |
---|
1853 | std::string target_token; |
---|
1854 | |
---|
1855 | if (!_reader_bits::readToken(line, source_token)) |
---|
1856 | throw FormatError("Node u not found"); |
---|
1857 | |
---|
1858 | if (!_reader_bits::readToken(line, target_token)) |
---|
1859 | throw FormatError("Node v not found"); |
---|
1860 | |
---|
1861 | std::vector<std::string> tokens(map_num); |
---|
1862 | for (int i = 0; i < map_num; ++i) { |
---|
1863 | if (!_reader_bits::readToken(line, tokens[i])) { |
---|
1864 | std::ostringstream msg; |
---|
1865 | msg << "Column not found (" << i + 1 << ")"; |
---|
1866 | throw FormatError(msg.str()); |
---|
1867 | } |
---|
1868 | } |
---|
1869 | if (line >> std::ws >> c) |
---|
1870 | throw FormatError("Extra character at the end of line"); |
---|
1871 | |
---|
1872 | Edge e; |
---|
1873 | if (!_use_edges) { |
---|
1874 | |
---|
1875 | typename NodeIndex::iterator it; |
---|
1876 | |
---|
1877 | it = _node_index.find(source_token); |
---|
1878 | if (it == _node_index.end()) { |
---|
1879 | std::ostringstream msg; |
---|
1880 | msg << "Item not found: " << source_token; |
---|
1881 | throw FormatError(msg.str()); |
---|
1882 | } |
---|
1883 | Node source = it->second; |
---|
1884 | |
---|
1885 | it = _node_index.find(target_token); |
---|
1886 | if (it == _node_index.end()) { |
---|
1887 | std::ostringstream msg; |
---|
1888 | msg << "Item not found: " << target_token; |
---|
1889 | throw FormatError(msg.str()); |
---|
1890 | } |
---|
1891 | Node target = it->second; |
---|
1892 | |
---|
1893 | e = _graph.addEdge(source, target); |
---|
1894 | if (label_index != -1) |
---|
1895 | _edge_index.insert(std::make_pair(tokens[label_index], e)); |
---|
1896 | } else { |
---|
1897 | if (label_index == -1) |
---|
1898 | throw FormatError("Label map not found"); |
---|
1899 | typename std::map<std::string, Edge>::iterator it = |
---|
1900 | _edge_index.find(tokens[label_index]); |
---|
1901 | if (it == _edge_index.end()) { |
---|
1902 | std::ostringstream msg; |
---|
1903 | msg << "Edge with label not found: " << tokens[label_index]; |
---|
1904 | throw FormatError(msg.str()); |
---|
1905 | } |
---|
1906 | e = it->second; |
---|
1907 | } |
---|
1908 | |
---|
1909 | for (int i = 0; i < static_cast<int>(_edge_maps.size()); ++i) { |
---|
1910 | _edge_maps[i].second->set(e, tokens[map_index[i]]); |
---|
1911 | } |
---|
1912 | |
---|
1913 | } |
---|
1914 | if (readSuccess()) { |
---|
1915 | line.putback(c); |
---|
1916 | } |
---|
1917 | } |
---|
1918 | |
---|
1919 | void readAttributes() { |
---|
1920 | |
---|
1921 | std::set<std::string> read_attr; |
---|
1922 | |
---|
1923 | char c; |
---|
1924 | while (readLine() && line >> c && c != '@') { |
---|
1925 | line.putback(c); |
---|
1926 | |
---|
1927 | std::string attr, token; |
---|
1928 | if (!_reader_bits::readToken(line, attr)) |
---|
1929 | throw FormatError("Attribute name not found"); |
---|
1930 | if (!_reader_bits::readToken(line, token)) |
---|
1931 | throw FormatError("Attribute value not found"); |
---|
1932 | if (line >> c) |
---|
1933 | throw FormatError("Extra character at the end of line"); |
---|
1934 | |
---|
1935 | { |
---|
1936 | std::set<std::string>::iterator it = read_attr.find(attr); |
---|
1937 | if (it != read_attr.end()) { |
---|
1938 | std::ostringstream msg; |
---|
1939 | msg << "Multiple occurence of attribute: " << attr; |
---|
1940 | throw FormatError(msg.str()); |
---|
1941 | } |
---|
1942 | read_attr.insert(attr); |
---|
1943 | } |
---|
1944 | |
---|
1945 | { |
---|
1946 | typename Attributes::iterator it = _attributes.lower_bound(attr); |
---|
1947 | while (it != _attributes.end() && it->first == attr) { |
---|
1948 | it->second->set(token); |
---|
1949 | ++it; |
---|
1950 | } |
---|
1951 | } |
---|
1952 | |
---|
1953 | } |
---|
1954 | if (readSuccess()) { |
---|
1955 | line.putback(c); |
---|
1956 | } |
---|
1957 | for (typename Attributes::iterator it = _attributes.begin(); |
---|
1958 | it != _attributes.end(); ++it) { |
---|
1959 | if (read_attr.find(it->first) == read_attr.end()) { |
---|
1960 | std::ostringstream msg; |
---|
1961 | msg << "Attribute not found: " << it->first; |
---|
1962 | throw FormatError(msg.str()); |
---|
1963 | } |
---|
1964 | } |
---|
1965 | } |
---|
1966 | |
---|
1967 | public: |
---|
1968 | |
---|
1969 | /// \name Execution of the reader |
---|
1970 | /// @{ |
---|
1971 | |
---|
1972 | /// \brief Start the batch processing |
---|
1973 | /// |
---|
1974 | /// This function starts the batch processing |
---|
1975 | void run() { |
---|
1976 | |
---|
1977 | LEMON_ASSERT(_is != 0, "This reader assigned to an other reader"); |
---|
1978 | |
---|
1979 | bool nodes_done = _skip_nodes; |
---|
1980 | bool edges_done = _skip_edges; |
---|
1981 | bool attributes_done = false; |
---|
1982 | |
---|
1983 | line_num = 0; |
---|
1984 | readLine(); |
---|
1985 | skipSection(); |
---|
1986 | |
---|
1987 | while (readSuccess()) { |
---|
1988 | try { |
---|
1989 | char c; |
---|
1990 | std::string section, caption; |
---|
1991 | line >> c; |
---|
1992 | _reader_bits::readToken(line, section); |
---|
1993 | _reader_bits::readToken(line, caption); |
---|
1994 | |
---|
1995 | if (line >> c) |
---|
1996 | throw FormatError("Extra character at the end of line"); |
---|
1997 | |
---|
1998 | if (section == "nodes" && !nodes_done) { |
---|
1999 | if (_nodes_caption.empty() || _nodes_caption == caption) { |
---|
2000 | readNodes(); |
---|
2001 | nodes_done = true; |
---|
2002 | } |
---|
2003 | } else if ((section == "edges" || section == "arcs") && |
---|
2004 | !edges_done) { |
---|
2005 | if (_edges_caption.empty() || _edges_caption == caption) { |
---|
2006 | readEdges(); |
---|
2007 | edges_done = true; |
---|
2008 | } |
---|
2009 | } else if (section == "attributes" && !attributes_done) { |
---|
2010 | if (_attributes_caption.empty() || _attributes_caption == caption) { |
---|
2011 | readAttributes(); |
---|
2012 | attributes_done = true; |
---|
2013 | } |
---|
2014 | } else { |
---|
2015 | readLine(); |
---|
2016 | skipSection(); |
---|
2017 | } |
---|
2018 | } catch (FormatError& error) { |
---|
2019 | error.line(line_num); |
---|
2020 | error.file(_filename); |
---|
2021 | throw; |
---|
2022 | } |
---|
2023 | } |
---|
2024 | |
---|
2025 | if (!nodes_done) { |
---|
2026 | throw FormatError("Section @nodes not found"); |
---|
2027 | } |
---|
2028 | |
---|
2029 | if (!edges_done) { |
---|
2030 | throw FormatError("Section @edges not found"); |
---|
2031 | } |
---|
2032 | |
---|
2033 | if (!attributes_done && !_attributes.empty()) { |
---|
2034 | throw FormatError("Section @attributes not found"); |
---|
2035 | } |
---|
2036 | |
---|
2037 | } |
---|
2038 | |
---|
2039 | /// @} |
---|
2040 | |
---|
2041 | }; |
---|
2042 | |
---|
2043 | class SectionReader; |
---|
2044 | |
---|
2045 | SectionReader sectionReader(std::istream& is); |
---|
2046 | SectionReader sectionReader(const std::string& fn); |
---|
2047 | SectionReader sectionReader(const char* fn); |
---|
2048 | |
---|
2049 | /// \ingroup lemon_io |
---|
2050 | /// |
---|
2051 | /// \brief Section reader class |
---|
2052 | /// |
---|
2053 | /// In the \ref lgf-format "LGF" file extra sections can be placed, |
---|
2054 | /// which contain any data in arbitrary format. Such sections can be |
---|
2055 | /// read with this class. A reading rule can be added to the class |
---|
2056 | /// with two different functions. With the \c sectionLines() function a |
---|
2057 | /// functor can process the section line-by-line, while with the \c |
---|
2058 | /// sectionStream() member the section can be read from an input |
---|
2059 | /// stream. |
---|
2060 | class SectionReader { |
---|
2061 | private: |
---|
2062 | |
---|
2063 | std::istream* _is; |
---|
2064 | bool local_is; |
---|
2065 | std::string _filename; |
---|
2066 | |
---|
2067 | typedef std::map<std::string, _reader_bits::Section*> Sections; |
---|
2068 | Sections _sections; |
---|
2069 | |
---|
2070 | int line_num; |
---|
2071 | std::istringstream line; |
---|
2072 | |
---|
2073 | public: |
---|
2074 | |
---|
2075 | /// \brief Constructor |
---|
2076 | /// |
---|
2077 | /// Construct a section reader, which reads from the given input |
---|
2078 | /// stream. |
---|
2079 | SectionReader(std::istream& is) |
---|
2080 | : _is(&is), local_is(false) {} |
---|
2081 | |
---|
2082 | /// \brief Constructor |
---|
2083 | /// |
---|
2084 | /// Construct a section reader, which reads from the given file. |
---|
2085 | SectionReader(const std::string& fn) |
---|
2086 | : _is(new std::ifstream(fn.c_str())), local_is(true), |
---|
2087 | _filename(fn) { |
---|
2088 | if (!(*_is)) { |
---|
2089 | delete _is; |
---|
2090 | throw IoError("Cannot open file", fn); |
---|
2091 | } |
---|
2092 | } |
---|
2093 | |
---|
2094 | /// \brief Constructor |
---|
2095 | /// |
---|
2096 | /// Construct a section reader, which reads from the given file. |
---|
2097 | SectionReader(const char* fn) |
---|
2098 | : _is(new std::ifstream(fn)), local_is(true), |
---|
2099 | _filename(fn) { |
---|
2100 | if (!(*_is)) { |
---|
2101 | delete _is; |
---|
2102 | throw IoError("Cannot open file", fn); |
---|
2103 | } |
---|
2104 | } |
---|
2105 | |
---|
2106 | /// \brief Destructor |
---|
2107 | ~SectionReader() { |
---|
2108 | for (Sections::iterator it = _sections.begin(); |
---|
2109 | it != _sections.end(); ++it) { |
---|
2110 | delete it->second; |
---|
2111 | } |
---|
2112 | |
---|
2113 | if (local_is) { |
---|
2114 | delete _is; |
---|
2115 | } |
---|
2116 | |
---|
2117 | } |
---|
2118 | |
---|
2119 | private: |
---|
2120 | |
---|
2121 | friend SectionReader sectionReader(std::istream& is); |
---|
2122 | friend SectionReader sectionReader(const std::string& fn); |
---|
2123 | friend SectionReader sectionReader(const char* fn); |
---|
2124 | |
---|
2125 | SectionReader(SectionReader& other) |
---|
2126 | : _is(other._is), local_is(other.local_is) { |
---|
2127 | |
---|
2128 | other._is = 0; |
---|
2129 | other.local_is = false; |
---|
2130 | |
---|
2131 | _sections.swap(other._sections); |
---|
2132 | } |
---|
2133 | |
---|
2134 | SectionReader& operator=(const SectionReader&); |
---|
2135 | |
---|
2136 | public: |
---|
2137 | |
---|
2138 | /// \name Section readers |
---|
2139 | /// @{ |
---|
2140 | |
---|
2141 | /// \brief Add a section processor with line oriented reading |
---|
2142 | /// |
---|
2143 | /// The first parameter is the type descriptor of the section, the |
---|
2144 | /// second is a functor, which takes just one \c std::string |
---|
2145 | /// parameter. At the reading process, each line of the section |
---|
2146 | /// will be given to the functor object. However, the empty lines |
---|
2147 | /// and the comment lines are filtered out, and the leading |
---|
2148 | /// whitespaces are trimmed from each processed string. |
---|
2149 | /// |
---|
2150 | /// For example let's see a section, which contain several |
---|
2151 | /// integers, which should be inserted into a vector. |
---|
2152 | ///\code |
---|
2153 | /// @numbers |
---|
2154 | /// 12 45 23 |
---|
2155 | /// 4 |
---|
2156 | /// 23 6 |
---|
2157 | ///\endcode |
---|
2158 | /// |
---|
2159 | /// The functor is implemented as a struct: |
---|
2160 | ///\code |
---|
2161 | /// struct NumberSection { |
---|
2162 | /// std::vector<int>& _data; |
---|
2163 | /// NumberSection(std::vector<int>& data) : _data(data) {} |
---|
2164 | /// void operator()(const std::string& line) { |
---|
2165 | /// std::istringstream ls(line); |
---|
2166 | /// int value; |
---|
2167 | /// while (ls >> value) _data.push_back(value); |
---|
2168 | /// } |
---|
2169 | /// }; |
---|
2170 | /// |
---|
2171 | /// // ... |
---|
2172 | /// |
---|
2173 | /// reader.sectionLines("numbers", NumberSection(vec)); |
---|
2174 | ///\endcode |
---|
2175 | template <typename Functor> |
---|
2176 | SectionReader& sectionLines(const std::string& type, Functor functor) { |
---|
2177 | LEMON_ASSERT(!type.empty(), "Type is empty."); |
---|
2178 | LEMON_ASSERT(_sections.find(type) == _sections.end(), |
---|
2179 | "Multiple reading of section."); |
---|
2180 | _sections.insert(std::make_pair(type, |
---|
2181 | new _reader_bits::LineSection<Functor>(functor))); |
---|
2182 | return *this; |
---|
2183 | } |
---|
2184 | |
---|
2185 | |
---|
2186 | /// \brief Add a section processor with stream oriented reading |
---|
2187 | /// |
---|
2188 | /// The first parameter is the type of the section, the second is |
---|
2189 | /// a functor, which takes an \c std::istream& and an \c int& |
---|
2190 | /// parameter, the latter regard to the line number of stream. The |
---|
2191 | /// functor can read the input while the section go on, and the |
---|
2192 | /// line number should be modified accordingly. |
---|
2193 | template <typename Functor> |
---|
2194 | SectionReader& sectionStream(const std::string& type, Functor functor) { |
---|
2195 | LEMON_ASSERT(!type.empty(), "Type is empty."); |
---|
2196 | LEMON_ASSERT(_sections.find(type) == _sections.end(), |
---|
2197 | "Multiple reading of section."); |
---|
2198 | _sections.insert(std::make_pair(type, |
---|
2199 | new _reader_bits::StreamSection<Functor>(functor))); |
---|
2200 | return *this; |
---|
2201 | } |
---|
2202 | |
---|
2203 | /// @} |
---|
2204 | |
---|
2205 | private: |
---|
2206 | |
---|
2207 | bool readLine() { |
---|
2208 | std::string str; |
---|
2209 | while(++line_num, std::getline(*_is, str)) { |
---|
2210 | line.clear(); line.str(str); |
---|
2211 | char c; |
---|
2212 | if (line >> std::ws >> c && c != '#') { |
---|
2213 | line.putback(c); |
---|
2214 | return true; |
---|
2215 | } |
---|
2216 | } |
---|
2217 | return false; |
---|
2218 | } |
---|
2219 | |
---|
2220 | bool readSuccess() { |
---|
2221 | return static_cast<bool>(*_is); |
---|
2222 | } |
---|
2223 | |
---|
2224 | void skipSection() { |
---|
2225 | char c; |
---|
2226 | while (readSuccess() && line >> c && c != '@') { |
---|
2227 | readLine(); |
---|
2228 | } |
---|
2229 | line.putback(c); |
---|
2230 | } |
---|
2231 | |
---|
2232 | public: |
---|
2233 | |
---|
2234 | |
---|
2235 | /// \name Execution of the reader |
---|
2236 | /// @{ |
---|
2237 | |
---|
2238 | /// \brief Start the batch processing |
---|
2239 | /// |
---|
2240 | /// This function starts the batch processing. |
---|
2241 | void run() { |
---|
2242 | |
---|
2243 | LEMON_ASSERT(_is != 0, "This reader assigned to an other reader"); |
---|
2244 | |
---|
2245 | std::set<std::string> extra_sections; |
---|
2246 | |
---|
2247 | line_num = 0; |
---|
2248 | readLine(); |
---|
2249 | skipSection(); |
---|
2250 | |
---|
2251 | while (readSuccess()) { |
---|
2252 | try { |
---|
2253 | char c; |
---|
2254 | std::string section, caption; |
---|
2255 | line >> c; |
---|
2256 | _reader_bits::readToken(line, section); |
---|
2257 | _reader_bits::readToken(line, caption); |
---|
2258 | |
---|
2259 | if (line >> c) |
---|
2260 | throw FormatError("Extra character at the end of line"); |
---|
2261 | |
---|
2262 | if (extra_sections.find(section) != extra_sections.end()) { |
---|
2263 | std::ostringstream msg; |
---|
2264 | msg << "Multiple occurence of section: " << section; |
---|
2265 | throw FormatError(msg.str()); |
---|
2266 | } |
---|
2267 | Sections::iterator it = _sections.find(section); |
---|
2268 | if (it != _sections.end()) { |
---|
2269 | extra_sections.insert(section); |
---|
2270 | it->second->process(*_is, line_num); |
---|
2271 | } |
---|
2272 | readLine(); |
---|
2273 | skipSection(); |
---|
2274 | } catch (FormatError& error) { |
---|
2275 | error.line(line_num); |
---|
2276 | error.file(_filename); |
---|
2277 | throw; |
---|
2278 | } |
---|
2279 | } |
---|
2280 | for (Sections::iterator it = _sections.begin(); |
---|
2281 | it != _sections.end(); ++it) { |
---|
2282 | if (extra_sections.find(it->first) == extra_sections.end()) { |
---|
2283 | std::ostringstream os; |
---|
2284 | os << "Cannot find section: " << it->first; |
---|
2285 | throw FormatError(os.str()); |
---|
2286 | } |
---|
2287 | } |
---|
2288 | } |
---|
2289 | |
---|
2290 | /// @} |
---|
2291 | |
---|
2292 | }; |
---|
2293 | |
---|
2294 | /// \brief Return a \ref SectionReader class |
---|
2295 | /// |
---|
2296 | /// This function just returns a \ref SectionReader class. |
---|
2297 | /// \relates SectionReader |
---|
2298 | inline SectionReader sectionReader(std::istream& is) { |
---|
2299 | SectionReader tmp(is); |
---|
2300 | return tmp; |
---|
2301 | } |
---|
2302 | |
---|
2303 | /// \brief Return a \ref SectionReader class |
---|
2304 | /// |
---|
2305 | /// This function just returns a \ref SectionReader class. |
---|
2306 | /// \relates SectionReader |
---|
2307 | inline SectionReader sectionReader(const std::string& fn) { |
---|
2308 | SectionReader tmp(fn); |
---|
2309 | return tmp; |
---|
2310 | } |
---|
2311 | |
---|
2312 | /// \brief Return a \ref SectionReader class |
---|
2313 | /// |
---|
2314 | /// This function just returns a \ref SectionReader class. |
---|
2315 | /// \relates SectionReader |
---|
2316 | inline SectionReader sectionReader(const char* fn) { |
---|
2317 | SectionReader tmp(fn); |
---|
2318 | return tmp; |
---|
2319 | } |
---|
2320 | |
---|
2321 | /// \ingroup lemon_io |
---|
2322 | /// |
---|
2323 | /// \brief Reader for the contents of the \ref lgf-format "LGF" file |
---|
2324 | /// |
---|
2325 | /// This class can be used to read the sections, the map names and |
---|
2326 | /// the attributes from a file. Usually, the LEMON programs know |
---|
2327 | /// that, which type of graph, which maps and which attributes |
---|
2328 | /// should be read from a file, but in general tools (like glemon) |
---|
2329 | /// the contents of an LGF file should be guessed somehow. This class |
---|
2330 | /// reads the graph and stores the appropriate information for |
---|
2331 | /// reading the graph. |
---|
2332 | /// |
---|
2333 | ///\code |
---|
2334 | /// LgfContents contents("graph.lgf"); |
---|
2335 | /// contents.run(); |
---|
2336 | /// |
---|
2337 | /// // Does it contain any node section and arc section? |
---|
2338 | /// if (contents.nodeSectionNum() == 0 || contents.arcSectionNum()) { |
---|
2339 | /// std::cerr << "Failure, cannot find graph." << std::endl; |
---|
2340 | /// return -1; |
---|
2341 | /// } |
---|
2342 | /// std::cout << "The name of the default node section: " |
---|
2343 | /// << contents.nodeSection(0) << std::endl; |
---|
2344 | /// std::cout << "The number of the arc maps: " |
---|
2345 | /// << contents.arcMaps(0).size() << std::endl; |
---|
2346 | /// std::cout << "The name of second arc map: " |
---|
2347 | /// << contents.arcMaps(0)[1] << std::endl; |
---|
2348 | ///\endcode |
---|
2349 | class LgfContents { |
---|
2350 | private: |
---|
2351 | |
---|
2352 | std::istream* _is; |
---|
2353 | bool local_is; |
---|
2354 | |
---|
2355 | std::vector<std::string> _node_sections; |
---|
2356 | std::vector<std::string> _edge_sections; |
---|
2357 | std::vector<std::string> _attribute_sections; |
---|
2358 | std::vector<std::string> _extra_sections; |
---|
2359 | |
---|
2360 | std::vector<bool> _arc_sections; |
---|
2361 | |
---|
2362 | std::vector<std::vector<std::string> > _node_maps; |
---|
2363 | std::vector<std::vector<std::string> > _edge_maps; |
---|
2364 | |
---|
2365 | std::vector<std::vector<std::string> > _attributes; |
---|
2366 | |
---|
2367 | |
---|
2368 | int line_num; |
---|
2369 | std::istringstream line; |
---|
2370 | |
---|
2371 | public: |
---|
2372 | |
---|
2373 | /// \brief Constructor |
---|
2374 | /// |
---|
2375 | /// Construct an \e LGF contents reader, which reads from the given |
---|
2376 | /// input stream. |
---|
2377 | LgfContents(std::istream& is) |
---|
2378 | : _is(&is), local_is(false) {} |
---|
2379 | |
---|
2380 | /// \brief Constructor |
---|
2381 | /// |
---|
2382 | /// Construct an \e LGF contents reader, which reads from the given |
---|
2383 | /// file. |
---|
2384 | LgfContents(const std::string& fn) |
---|
2385 | : _is(new std::ifstream(fn.c_str())), local_is(true) { |
---|
2386 | if (!(*_is)) { |
---|
2387 | delete _is; |
---|
2388 | throw IoError("Cannot open file", fn); |
---|
2389 | } |
---|
2390 | } |
---|
2391 | |
---|
2392 | /// \brief Constructor |
---|
2393 | /// |
---|
2394 | /// Construct an \e LGF contents reader, which reads from the given |
---|
2395 | /// file. |
---|
2396 | LgfContents(const char* fn) |
---|
2397 | : _is(new std::ifstream(fn)), local_is(true) { |
---|
2398 | if (!(*_is)) { |
---|
2399 | delete _is; |
---|
2400 | throw IoError("Cannot open file", fn); |
---|
2401 | } |
---|
2402 | } |
---|
2403 | |
---|
2404 | /// \brief Destructor |
---|
2405 | ~LgfContents() { |
---|
2406 | if (local_is) delete _is; |
---|
2407 | } |
---|
2408 | |
---|
2409 | private: |
---|
2410 | |
---|
2411 | LgfContents(const LgfContents&); |
---|
2412 | LgfContents& operator=(const LgfContents&); |
---|
2413 | |
---|
2414 | public: |
---|
2415 | |
---|
2416 | |
---|
2417 | /// \name Node sections |
---|
2418 | /// @{ |
---|
2419 | |
---|
2420 | /// \brief Gives back the number of node sections in the file. |
---|
2421 | /// |
---|
2422 | /// Gives back the number of node sections in the file. |
---|
2423 | int nodeSectionNum() const { |
---|
2424 | return _node_sections.size(); |
---|
2425 | } |
---|
2426 | |
---|
2427 | /// \brief Returns the node section name at the given position. |
---|
2428 | /// |
---|
2429 | /// Returns the node section name at the given position. |
---|
2430 | const std::string& nodeSection(int i) const { |
---|
2431 | return _node_sections[i]; |
---|
2432 | } |
---|
2433 | |
---|
2434 | /// \brief Gives back the node maps for the given section. |
---|
2435 | /// |
---|
2436 | /// Gives back the node maps for the given section. |
---|
2437 | const std::vector<std::string>& nodeMapNames(int i) const { |
---|
2438 | return _node_maps[i]; |
---|
2439 | } |
---|
2440 | |
---|
2441 | /// @} |
---|
2442 | |
---|
2443 | /// \name Arc/Edge sections |
---|
2444 | /// @{ |
---|
2445 | |
---|
2446 | /// \brief Gives back the number of arc/edge sections in the file. |
---|
2447 | /// |
---|
2448 | /// Gives back the number of arc/edge sections in the file. |
---|
2449 | /// \note It is synonym of \c edgeSectionNum(). |
---|
2450 | int arcSectionNum() const { |
---|
2451 | return _edge_sections.size(); |
---|
2452 | } |
---|
2453 | |
---|
2454 | /// \brief Returns the arc/edge section name at the given position. |
---|
2455 | /// |
---|
2456 | /// Returns the arc/edge section name at the given position. |
---|
2457 | /// \note It is synonym of \c edgeSection(). |
---|
2458 | const std::string& arcSection(int i) const { |
---|
2459 | return _edge_sections[i]; |
---|
2460 | } |
---|
2461 | |
---|
2462 | /// \brief Gives back the arc/edge maps for the given section. |
---|
2463 | /// |
---|
2464 | /// Gives back the arc/edge maps for the given section. |
---|
2465 | /// \note It is synonym of \c edgeMapNames(). |
---|
2466 | const std::vector<std::string>& arcMapNames(int i) const { |
---|
2467 | return _edge_maps[i]; |
---|
2468 | } |
---|
2469 | |
---|
2470 | /// @} |
---|
2471 | |
---|
2472 | /// \name Synonyms |
---|
2473 | /// @{ |
---|
2474 | |
---|
2475 | /// \brief Gives back the number of arc/edge sections in the file. |
---|
2476 | /// |
---|
2477 | /// Gives back the number of arc/edge sections in the file. |
---|
2478 | /// \note It is synonym of \c arcSectionNum(). |
---|
2479 | int edgeSectionNum() const { |
---|
2480 | return _edge_sections.size(); |
---|
2481 | } |
---|
2482 | |
---|
2483 | /// \brief Returns the section name at the given position. |
---|
2484 | /// |
---|
2485 | /// Returns the section name at the given position. |
---|
2486 | /// \note It is synonym of \c arcSection(). |
---|
2487 | const std::string& edgeSection(int i) const { |
---|
2488 | return _edge_sections[i]; |
---|
2489 | } |
---|
2490 | |
---|
2491 | /// \brief Gives back the edge maps for the given section. |
---|
2492 | /// |
---|
2493 | /// Gives back the edge maps for the given section. |
---|
2494 | /// \note It is synonym of \c arcMapNames(). |
---|
2495 | const std::vector<std::string>& edgeMapNames(int i) const { |
---|
2496 | return _edge_maps[i]; |
---|
2497 | } |
---|
2498 | |
---|
2499 | /// @} |
---|
2500 | |
---|
2501 | /// \name Attribute sections |
---|
2502 | /// @{ |
---|
2503 | |
---|
2504 | /// \brief Gives back the number of attribute sections in the file. |
---|
2505 | /// |
---|
2506 | /// Gives back the number of attribute sections in the file. |
---|
2507 | int attributeSectionNum() const { |
---|
2508 | return _attribute_sections.size(); |
---|
2509 | } |
---|
2510 | |
---|
2511 | /// \brief Returns the attribute section name at the given position. |
---|
2512 | /// |
---|
2513 | /// Returns the attribute section name at the given position. |
---|
2514 | const std::string& attributeSectionNames(int i) const { |
---|
2515 | return _attribute_sections[i]; |
---|
2516 | } |
---|
2517 | |
---|
2518 | /// \brief Gives back the attributes for the given section. |
---|
2519 | /// |
---|
2520 | /// Gives back the attributes for the given section. |
---|
2521 | const std::vector<std::string>& attributes(int i) const { |
---|
2522 | return _attributes[i]; |
---|
2523 | } |
---|
2524 | |
---|
2525 | /// @} |
---|
2526 | |
---|
2527 | /// \name Extra sections |
---|
2528 | /// @{ |
---|
2529 | |
---|
2530 | /// \brief Gives back the number of extra sections in the file. |
---|
2531 | /// |
---|
2532 | /// Gives back the number of extra sections in the file. |
---|
2533 | int extraSectionNum() const { |
---|
2534 | return _extra_sections.size(); |
---|
2535 | } |
---|
2536 | |
---|
2537 | /// \brief Returns the extra section type at the given position. |
---|
2538 | /// |
---|
2539 | /// Returns the section type at the given position. |
---|
2540 | const std::string& extraSection(int i) const { |
---|
2541 | return _extra_sections[i]; |
---|
2542 | } |
---|
2543 | |
---|
2544 | /// @} |
---|
2545 | |
---|
2546 | private: |
---|
2547 | |
---|
2548 | bool readLine() { |
---|
2549 | std::string str; |
---|
2550 | while(++line_num, std::getline(*_is, str)) { |
---|
2551 | line.clear(); line.str(str); |
---|
2552 | char c; |
---|
2553 | if (line >> std::ws >> c && c != '#') { |
---|
2554 | line.putback(c); |
---|
2555 | return true; |
---|
2556 | } |
---|
2557 | } |
---|
2558 | return false; |
---|
2559 | } |
---|
2560 | |
---|
2561 | bool readSuccess() { |
---|
2562 | return static_cast<bool>(*_is); |
---|
2563 | } |
---|
2564 | |
---|
2565 | void skipSection() { |
---|
2566 | char c; |
---|
2567 | while (readSuccess() && line >> c && c != '@') { |
---|
2568 | readLine(); |
---|
2569 | } |
---|
2570 | line.putback(c); |
---|
2571 | } |
---|
2572 | |
---|
2573 | void readMaps(std::vector<std::string>& maps) { |
---|
2574 | char c; |
---|
2575 | if (!readLine() || !(line >> c) || c == '@') { |
---|
2576 | if (readSuccess() && line) line.putback(c); |
---|
2577 | return; |
---|
2578 | } |
---|
2579 | line.putback(c); |
---|
2580 | std::string map; |
---|
2581 | while (_reader_bits::readToken(line, map)) { |
---|
2582 | maps.push_back(map); |
---|
2583 | } |
---|
2584 | } |
---|
2585 | |
---|
2586 | void readAttributes(std::vector<std::string>& attrs) { |
---|
2587 | readLine(); |
---|
2588 | char c; |
---|
2589 | while (readSuccess() && line >> c && c != '@') { |
---|
2590 | line.putback(c); |
---|
2591 | std::string attr; |
---|
2592 | _reader_bits::readToken(line, attr); |
---|
2593 | attrs.push_back(attr); |
---|
2594 | readLine(); |
---|
2595 | } |
---|
2596 | line.putback(c); |
---|
2597 | } |
---|
2598 | |
---|
2599 | public: |
---|
2600 | |
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2601 | /// \name Execution of the contents reader |
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2602 | /// @{ |
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2603 | |
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2604 | /// \brief Starts the reading |
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2605 | /// |
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2606 | /// This function starts the reading. |
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2607 | void run() { |
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2608 | |
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2609 | readLine(); |
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2610 | skipSection(); |
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2611 | |
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2612 | while (readSuccess()) { |
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2613 | |
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2614 | char c; |
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2615 | line >> c; |
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2616 | |
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2617 | std::string section, caption; |
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2618 | _reader_bits::readToken(line, section); |
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2619 | _reader_bits::readToken(line, caption); |
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2620 | |
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2621 | if (section == "nodes") { |
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2622 | _node_sections.push_back(caption); |
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2623 | _node_maps.push_back(std::vector<std::string>()); |
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2624 | readMaps(_node_maps.back()); |
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2625 | readLine(); skipSection(); |
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2626 | } else if (section == "arcs" || section == "edges") { |
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2627 | _edge_sections.push_back(caption); |
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2628 | _arc_sections.push_back(section == "arcs"); |
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2629 | _edge_maps.push_back(std::vector<std::string>()); |
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2630 | readMaps(_edge_maps.back()); |
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2631 | readLine(); skipSection(); |
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2632 | } else if (section == "attributes") { |
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2633 | _attribute_sections.push_back(caption); |
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2634 | _attributes.push_back(std::vector<std::string>()); |
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2635 | readAttributes(_attributes.back()); |
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2636 | } else { |
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2637 | _extra_sections.push_back(section); |
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2638 | readLine(); skipSection(); |
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2639 | } |
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2640 | } |
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2641 | } |
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2642 | |
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2643 | /// @} |
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2644 | |
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2645 | }; |
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2646 | } |
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2647 | |
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2648 | #endif |
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