1 | /* -*- C++ -*- |
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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) 2003-2006 |
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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 | #ifndef GLEMON_XML_H |
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20 | #define GLEMON_XML_H |
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21 | |
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22 | #include <iostream> |
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23 | #include <string> |
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24 | #include <vector> |
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25 | #include <list> |
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26 | #include <map> |
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27 | #include <lemon/error.h> |
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28 | #include <lemon/assert.h> |
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29 | #include <lemon/dim2.h> |
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30 | |
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31 | namespace lemon { |
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32 | |
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33 | class XmlIo |
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34 | { |
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35 | bool _writeMode; |
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36 | public: |
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37 | ///Check if XmlIo is in write mode. |
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38 | bool write() { return _writeMode;} |
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39 | ///Check if XmlIo is in read mode. |
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40 | bool read() { return !_writeMode;} |
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41 | |
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42 | std::ostream& os; |
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43 | int level; |
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44 | |
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45 | protected: |
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46 | void indent(int level) { |
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47 | os << std::endl; |
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48 | for(int i=0;i<level;i++) os << ' '; |
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49 | } |
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50 | void tag(const std::string &_tag) { |
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51 | os << '<' << _tag << '>'; |
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52 | } |
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53 | void etag(const std::string &_tag) { |
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54 | os << "</" << _tag << '>'; |
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55 | } |
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56 | void itag(const std::string &_tag) { indent();tag(_tag); } |
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57 | void ietag(const std::string &_tag) { indent();etag(_tag); } |
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58 | |
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59 | void beginTag(const std::string &_tag) { |
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60 | itag(_tag); |
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61 | level++; |
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62 | } |
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63 | void endTag(const std::string &_tag) { |
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64 | level--; |
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65 | ietag(_tag); |
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66 | } |
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67 | |
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68 | public: |
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69 | ///Indent the line according to its level. |
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70 | |
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71 | ///\warning It can only be used in write mode. |
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72 | /// |
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73 | void indent() |
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74 | { |
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75 | if(write()) |
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76 | if(level>=0) indent(level); |
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77 | else level=0; |
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78 | else LEMON_ASSERT(true, "Invalid indentation."); |
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79 | } |
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80 | |
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81 | ///Read/write a tag |
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82 | |
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83 | ///Read/write a tag. |
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84 | ///In write mode it does not start a new line. |
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85 | class ContTag |
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86 | { |
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87 | XmlIo &ix; |
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88 | const std::string _tag; |
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89 | public: |
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90 | ///\e |
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91 | |
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92 | ///\e |
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93 | /// |
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94 | ContTag(XmlIo &_ix,const std::string &_t) : |
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95 | ix(_ix), _tag(_t) |
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96 | { |
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97 | if(ix.write()) ix.tag(_tag); |
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98 | else ix.useTag(_tag); |
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99 | } |
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100 | ~ContTag() { |
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101 | if(ix.write()) ix.etag(_tag); |
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102 | else if(!std::uncaught_exception()) ix.useTag('/'+_tag); |
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103 | } |
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104 | }; |
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105 | |
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106 | ///Read/write a tag |
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107 | |
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108 | ///Read/write a tag. |
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109 | ///The whole \<foo\> ... \</foo\> will be placed in a single line. |
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110 | class LineTag |
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111 | { |
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112 | XmlIo &ix; |
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113 | const std::string _tag; |
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114 | public: |
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115 | ///\e |
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116 | |
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117 | ///\e |
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118 | /// |
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119 | LineTag(XmlIo &_ix,const std::string &_t) : |
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120 | ix(_ix), _tag(_t) |
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121 | { |
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122 | if(ix.write()) ix.itag(_tag); |
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123 | else ix.useTag(_tag); |
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124 | } |
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125 | ~LineTag() { |
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126 | if(ix.write()) ix.etag(_tag); |
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127 | else if(!std::uncaught_exception()) ix.useTag('/'+_tag); |
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128 | } |
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129 | }; |
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130 | |
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131 | ///Read/write a tag |
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132 | |
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133 | ///Read/write a tag. |
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134 | /// |
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135 | class Tag |
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136 | { |
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137 | XmlIo &ix; |
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138 | const std::string _tag; |
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139 | public: |
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140 | ///\e |
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141 | |
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142 | ///\e |
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143 | /// |
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144 | Tag(XmlIo &_ix,const std::string &_t) : |
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145 | ix(_ix), _tag(_t) |
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146 | { |
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147 | if(ix.write()) ix.beginTag(_tag); |
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148 | else ix.useTag(_tag); |
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149 | } |
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150 | ~Tag() { |
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151 | if(ix.write()) ix.endTag(_tag); |
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152 | else if(!std::uncaught_exception()) ix.useTag('/'+_tag); |
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153 | } |
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154 | }; |
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155 | |
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156 | private: |
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157 | std::istream& is; |
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158 | std::string next_tag; |
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159 | int line_number; |
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160 | |
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161 | void skipWhiteSpaces() |
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162 | { |
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163 | if(write()) LEMON_ASSERT(true, "Can't skip whitespaces in write mode."); |
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164 | { |
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165 | char c; |
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166 | while (is.get(c) && std::isspace(c,is.getloc())) |
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167 | if(c=='\n') line_number++; |
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168 | is.unget(); |
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169 | } |
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170 | } |
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171 | protected: |
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172 | /// Use the next tag. |
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173 | |
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174 | ///\e |
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175 | /// |
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176 | void useTag() {next_tag.clear();} |
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177 | |
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178 | ///Use the next tag and check if it is equal with \c _tag |
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179 | |
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180 | ///\e |
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181 | /// |
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182 | void useTag(const std::string &_tag) { |
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183 | if(nextTag()==_tag) useTag(); |
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184 | else throw FormatError("Unexpected token name","",line_number); |
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185 | } |
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186 | public: |
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187 | ///Return the next tag (if a tag follows on the stream). |
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188 | |
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189 | ///\warning It can only be used in read mode. |
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190 | /// |
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191 | const std::string &nextTag() |
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192 | { |
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193 | if(write()) LEMON_ASSERT(true,"Don't use nextTag() in write mode"); |
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194 | else if(next_tag.empty()) { |
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195 | char c; |
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196 | skipWhiteSpaces(); |
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197 | if(!is.get(c) || c!='<') |
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198 | throw FormatError("Bad format","",line_number); |
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199 | next_tag.clear(); |
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200 | while (is.get(c) && c!='>') next_tag.push_back(c); |
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201 | if(c!='>') |
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202 | throw FormatError("Bad format","",line_number); |
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203 | } |
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204 | return next_tag; |
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205 | } |
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206 | |
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207 | /**********************************************************************/ |
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208 | |
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209 | |
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210 | ///\e |
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211 | |
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212 | ///\e |
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213 | /// |
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214 | XmlIo(std::ostream& _os) : _writeMode(true), os(_os), |
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215 | level(-1), |
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216 | is(std::cin) {} |
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217 | ///\e |
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218 | /// |
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219 | XmlIo(std::istream& _is) : _writeMode(false), |
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220 | os(std::cout), is(_is), |
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221 | line_number(1) {} |
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222 | |
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223 | ~XmlIo() { if(write()) os<< std::endl; } |
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224 | |
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225 | |
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226 | |
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227 | XmlIo &operator()(const int &v) |
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228 | { |
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229 | if(write()) os << v; |
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230 | else { |
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231 | skipWhiteSpaces(); |
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232 | if(!(is >> const_cast<int &>(v))) |
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233 | throw FormatError("Not an 'int'","",line_number); |
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234 | } |
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235 | return *this; |
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236 | } |
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237 | XmlIo &operator()(const double &v) |
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238 | { |
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239 | if(write()) os << v; |
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240 | else { |
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241 | skipWhiteSpaces(); |
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242 | if(!(is >> const_cast<double &>(v))) |
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243 | throw FormatError("Not an 'double'","",line_number); |
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244 | } |
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245 | return *this; |
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246 | } |
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247 | XmlIo &operator()(const std::string &v) |
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248 | { |
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249 | if(write()) |
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250 | for(std::string::const_iterator i=v.begin();i!=v.end();++i) |
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251 | switch(*i) { |
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252 | case '\\': |
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253 | os << "\\\\"; |
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254 | break; |
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255 | case '<': |
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256 | os << "\\<"; |
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257 | break; |
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258 | case '&': |
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259 | os << "\\&"; |
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260 | break; |
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261 | case '\n': |
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262 | os << "\\n"; |
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263 | break; |
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264 | default: |
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265 | os<<*i; |
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266 | break; |
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267 | } |
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268 | else { |
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269 | std::string &w = const_cast<std::string &>(v); |
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270 | w.clear(); |
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271 | char c; |
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272 | while (is.get(c) && c!='<') |
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273 | if(c=='\\') |
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274 | if(!is.get(c)) |
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275 | throw FormatError("Bad string","",line_number); |
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276 | else switch(c) { |
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277 | case 'n': |
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278 | w.push_back('\n'); |
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279 | break; |
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280 | default: |
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281 | w.push_back(c); |
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282 | break; |
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283 | } |
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284 | else { |
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285 | if(c=='\n') line_number++; |
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286 | w.push_back(c); |
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287 | } |
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288 | if(c!='<') |
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289 | throw FormatError("Unexpected eof","",line_number); |
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290 | is.unget(); |
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291 | } |
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292 | return *this; |
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293 | } |
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294 | |
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295 | |
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296 | XmlIo &operator()(const std::string &_tag,const int &v) |
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297 | { |
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298 | LineTag t(*this,_tag); |
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299 | (*this)(v); |
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300 | return *this; |
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301 | } |
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302 | XmlIo &operator()(const std::string &_tag,const double &v) |
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303 | { |
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304 | LineTag t(*this,_tag); |
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305 | (*this)(v); |
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306 | return *this; |
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307 | } |
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308 | XmlIo &operator()(const std::string &_tag,const std::string &v) |
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309 | { |
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310 | LineTag t(*this,_tag); |
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311 | (*this)(v); |
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312 | return *this; |
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313 | } |
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314 | ///\e |
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315 | |
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316 | ///\e |
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317 | /// |
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318 | template<class V> |
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319 | XmlIo &operator()(const std::string &_tag,const V &v) |
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320 | { |
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321 | Tag t(*this,_tag); |
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322 | xml(*this,const_cast<V &>(v)); |
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323 | return *this; |
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324 | } |
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325 | ///\e |
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326 | |
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327 | ///\e |
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328 | /// |
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329 | template<class V> |
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330 | XmlIo &operator()(const V &v) |
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331 | { |
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332 | xml(*this,const_cast<V &>(v)); |
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333 | return *this; |
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334 | } |
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335 | }; |
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336 | |
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337 | ////////////////////////////////////////////////////////////////////// |
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338 | ////////////////////////////////////////////////////////////////////// |
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339 | |
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340 | ///\e |
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341 | |
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342 | ///\relates XmlIo |
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343 | /// |
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344 | template<class A> |
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345 | void xml(XmlIo &x,std::auto_ptr<A> &v) |
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346 | { |
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347 | if(x.write()) v=new A; |
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348 | x(*v); |
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349 | } |
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350 | |
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351 | ///\e |
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352 | |
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353 | ///\relates XmlIo |
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354 | /// |
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355 | template<class A,class B> |
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356 | void xml(XmlIo &x,std::pair<A,B> &v) |
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357 | { |
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358 | x("first",v.first); |
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359 | x("second",v.second); |
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360 | } |
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361 | |
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362 | ///\e |
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363 | |
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364 | ///\relates XmlIo |
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365 | /// |
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366 | template<class T> |
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367 | void xml(XmlIo &x,std::list<T> &v) |
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368 | { |
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369 | if(x.write()) |
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370 | for(typename std::list<T>::const_iterator it=v.begin(); |
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371 | it!=v.end();++it) x("item",*it); |
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372 | else while(x.nextTag()=="item") |
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373 | { |
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374 | v.push_back(T()); |
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375 | x("item",v.back()); |
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376 | } |
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377 | } |
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378 | ///\e |
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379 | |
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380 | ///\relates XmlIo |
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381 | /// |
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382 | template<class T> |
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383 | void xml(XmlIo &x,std::vector<T> &v) |
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384 | { |
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385 | if(x.write()) |
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386 | for(typename std::vector<T>::const_iterator it=v.begin(); |
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387 | it!=v.end();++it) x("item",*it); |
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388 | else while(x.nextTag()=="item") |
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389 | { |
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390 | v.push_back(T()); |
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391 | x("item",v.back()); |
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392 | } |
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393 | } |
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394 | |
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395 | ///\e |
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396 | |
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397 | ///\relates XmlIo |
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398 | /// |
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399 | template<class K,class V> |
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400 | void xml(XmlIo &x,std::map<K,V> &v) |
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401 | { |
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402 | if(x.write()) |
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403 | for(typename std::map<K,V>::const_iterator it=v.begin(); |
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404 | it!=v.end();++it) x("item",*it); |
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405 | else while(x.nextTag()=="item") |
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406 | { |
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407 | typename std::map<K,V>::value_type it; |
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408 | x("item",it); |
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409 | v.insert(it); |
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410 | } |
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411 | } |
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412 | |
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413 | ///\e |
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414 | |
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415 | ///\relates XmlIo |
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416 | /// |
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417 | template<class T> |
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418 | void xml(XmlIo &x,lemon::dim2::Point<T> &v) |
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419 | { |
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420 | { XmlIo::LineTag t(x,"x"); x(v.x); } |
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421 | { XmlIo::ContTag t(x,"y"); x(v.y); } |
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422 | } |
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423 | |
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424 | ///\e |
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425 | |
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426 | ///\relates XmlIo |
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427 | /// |
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428 | template<class T> |
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429 | void xml(XmlIo &x,lemon::dim2::Box<T> &v) |
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430 | { |
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431 | if(x.write()) { |
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432 | if(!v.empty()) { |
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433 | x("point",v.bottomLeft()); |
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434 | if(v.bottomLeft()!=v.topRight()) x("point",v.topRight()); |
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435 | } |
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436 | } |
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437 | else { |
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438 | v.clear(); |
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439 | while(x.nextTag()=="point") { |
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440 | lemon::dim2::Point<T> co; |
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441 | x("point",co); |
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442 | v.add(co); |
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443 | } |
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444 | } |
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445 | } |
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446 | |
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447 | } |
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448 | |
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449 | #endif |
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