1 | /* |
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2 | * ---------------------------------------------------------------------- |
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3 | * Rappture Library Header |
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4 | * |
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5 | * ====================================================================== |
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6 | * AUTHOR: Derrick Kearney, Purdue University |
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7 | * Copyright (c) 2005 |
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8 | * Purdue Research Foundation, West Lafayette, IN |
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9 | * ====================================================================== |
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10 | */ |
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11 | |
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12 | #include "scew.h" |
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13 | #include "scew_extras.h" |
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14 | #include <iostream> |
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15 | #include <string> |
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16 | #include <sstream> |
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17 | #include <fstream> |
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18 | #include <stdlib.h> |
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19 | #include <errno.h> |
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20 | #include <time.h> |
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21 | |
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22 | /* indentation size (in whitespaces) */ |
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23 | #define INDENT_SIZE 4 |
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24 | |
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25 | #ifndef _RpLIBRARY_H |
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26 | #define _RpLIBRARY_H |
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27 | |
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28 | class RpLibrary |
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29 | { |
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30 | public: |
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31 | |
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32 | // users member fxns |
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33 | |
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34 | RpLibrary* element (std::string path = "", std::string as = "object"); |
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35 | |
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36 | // should return RpObject& but for simplicity right now it doesnt |
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37 | // RpObject will either be an Array, RpString, RpNumber ... |
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38 | |
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39 | RpLibrary* children ( std::string path = "", |
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40 | RpLibrary* rpChildNode = NULL, |
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41 | std::string type = "", |
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42 | int* childCount = NULL ); |
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43 | |
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44 | RpLibrary* get (std::string path = ""); |
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45 | std::string getString (std::string path = ""); |
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46 | double getDouble (std::string path = ""); |
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47 | |
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48 | RpLibrary& put ( std::string path, |
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49 | std::string value, |
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50 | std::string id = "", |
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51 | int append = 0 ); |
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52 | |
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53 | RpLibrary& put ( std::string path, |
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54 | double value, |
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55 | std::string id = "", |
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56 | int append = 0 ); |
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57 | |
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58 | RpLibrary& remove (std::string path = ""); |
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59 | |
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60 | std::string xml(); |
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61 | |
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62 | std::string nodeType(); |
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63 | std::string nodeId(); |
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64 | std::string nodeComp(); |
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65 | |
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66 | void result(); |
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67 | const char* nodeTypeC(); |
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68 | const char* nodeIdC(); |
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69 | const char* nodeCompC(); |
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70 | |
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71 | // no arg constructor |
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72 | // used when we dont want to read an xml file to populate the xml tree |
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73 | // we are building a new xml structure |
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74 | RpLibrary () |
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75 | : parser (NULL), |
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76 | tree (NULL), |
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77 | root (NULL) |
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78 | { |
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79 | tree = scew_tree_create(); |
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80 | freeTree = 1; |
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81 | root = scew_tree_add_root(tree, "run"); |
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82 | } |
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83 | |
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84 | RpLibrary ( |
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85 | std::string filePath |
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86 | ) |
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87 | : parser (NULL), |
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88 | tree (NULL), |
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89 | root (NULL) |
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90 | { |
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91 | |
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92 | if (filePath.length() != 0) { |
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93 | // file path should not be null or empty string unless we are |
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94 | // creating a new xml file |
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95 | |
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96 | parser = scew_parser_create(); |
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97 | |
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98 | scew_parser_ignore_whitespaces(parser, 1); |
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99 | |
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100 | /* Loads an XML file */ |
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101 | if (!scew_parser_load_file(parser, filePath.c_str())) |
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102 | { |
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103 | scew_error code = scew_error_code(); |
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104 | printf("Unable to load file (error #%d: %s)\n", code, |
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105 | scew_error_string(code)); |
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106 | |
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107 | /* |
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108 | std::cout << "Unable to load file (error #" \ |
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109 | << code << ": " << scew_error_string(code) \ |
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110 | << ")\n" << std::endl; |
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111 | */ |
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112 | |
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113 | if (code == scew_error_expat) |
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114 | { |
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115 | enum XML_Error expat_code = |
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116 | scew_error_expat_code(parser); |
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117 | printf("Expat error #%d (line %d, column %d): %s\n", |
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118 | expat_code, |
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119 | scew_error_expat_line(parser), |
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120 | scew_error_expat_column(parser), |
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121 | scew_error_expat_string(expat_code)); |
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122 | } |
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123 | // should probably exit program or something |
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124 | // return EXIT_FAILURE; |
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125 | |
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126 | } |
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127 | |
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128 | tree = scew_parser_tree(parser); |
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129 | freeTree = 0; |
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130 | root = scew_tree_root(tree); |
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131 | } |
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132 | else { |
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133 | // create a new xml (from an empty file) |
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134 | } |
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135 | } |
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136 | |
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137 | |
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138 | // copy constructor |
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139 | // for some reason making this a const gives me problems when calling xml() |
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140 | // need help looking into this |
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141 | // RpLibrary ( const RpLibrary& other ) |
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142 | RpLibrary ( RpLibrary& other ) |
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143 | : parser (NULL), |
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144 | tree (NULL), |
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145 | root (NULL) |
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146 | { |
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147 | std::string buffer; |
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148 | int buffLen; |
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149 | |
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150 | // fill in the current RpLibrary's data with other's data |
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151 | parser = scew_parser_create(); |
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152 | scew_parser_ignore_whitespaces(parser, 1); |
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153 | |
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154 | // Loads the XML from other |
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155 | // the length cannot be 0 because xml() should not be returning |
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156 | // empty strings |
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157 | buffer = other.xml(); |
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158 | buffLen = buffer.length(); |
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159 | |
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160 | if (buffLen > 0) { |
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161 | if (!scew_parser_load_buffer(parser,buffer.c_str(),buffLen)) |
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162 | { |
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163 | // there was an error loading the buffer |
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164 | // how do you tell the user, you couldn't make a copy? |
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165 | scew_error code = scew_error_code(); |
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166 | printf("Unable to load buffer (error #%d: %s)\n", code, |
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167 | scew_error_string(code)); |
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168 | |
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169 | if (code == scew_error_expat) |
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170 | { |
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171 | enum XML_Error expat_code = |
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172 | scew_error_expat_code(parser); |
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173 | printf("Expat error #%d (line %d, column %d): %s\n", |
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174 | expat_code, |
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175 | scew_error_expat_line(parser), |
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176 | scew_error_expat_column(parser), |
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177 | scew_error_expat_string(expat_code)); |
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178 | } |
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179 | |
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180 | // return an empty RpLibrary? |
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181 | // return EXIT_FAILURE; |
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182 | |
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183 | parser = NULL; |
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184 | } |
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185 | else { |
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186 | |
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187 | // parsing the buffer was successful |
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188 | // populate the new data members. |
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189 | |
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190 | tree = scew_parser_tree(parser); |
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191 | freeTree = 0; |
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192 | root = scew_tree_root(tree); |
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193 | |
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194 | } |
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195 | |
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196 | } // end if (buffer.length() != 0) { |
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197 | }// end copy constructor |
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198 | |
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199 | // for some reason making this a const gives me problems when calling xml() |
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200 | // need help looking into this |
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201 | // RpLibrary& operator= (const RpLibrary& other) { |
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202 | RpLibrary& operator= (RpLibrary& other) { |
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203 | |
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204 | std::string buffer; |
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205 | int buffLen; |
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206 | |
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207 | scew_parser* tmp_parser; |
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208 | scew_tree* tmp_tree; |
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209 | scew_element* tmp_root; |
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210 | int tmp_freeTree; |
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211 | |
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212 | if (this != &other) { |
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213 | |
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214 | tmp_parser = parser; |
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215 | tmp_tree = tree; |
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216 | tmp_root = root; |
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217 | tmp_freeTree = freeTree; |
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218 | |
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219 | // fill in the current RpLibrary's data with other's data |
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220 | parser = scew_parser_create(); |
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221 | scew_parser_ignore_whitespaces(parser, 1); |
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222 | |
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223 | // Loads the XML from other |
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224 | // the length cannot be 0 because xml() should not be returning |
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225 | // empty strings |
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226 | buffer = other.xml(); |
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227 | buffLen = buffer.length(); |
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228 | |
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229 | if (buffLen > 0) { |
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230 | if (!scew_parser_load_buffer(parser,buffer.c_str(),buffLen)) |
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231 | { |
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232 | // there was an error loading the buffer |
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233 | // how do you tell the user, you couldn't make a copy? |
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234 | scew_error code = scew_error_code(); |
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235 | printf("Unable to load buffer (error #%d: %s)\n", code, |
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236 | scew_error_string(code)); |
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237 | |
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238 | if (code == scew_error_expat) |
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239 | { |
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240 | enum XML_Error expat_code = |
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241 | scew_error_expat_code(parser); |
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242 | printf("Expat error #%d (line %d, column %d): %s\n", |
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243 | expat_code, |
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244 | scew_error_expat_line(parser), |
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245 | scew_error_expat_column(parser), |
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246 | scew_error_expat_string(expat_code)); |
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247 | } |
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248 | |
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249 | // return things back to the way they used to be |
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250 | // or maybe return an empty RpLibrary? |
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251 | // return EXIT_FAILURE; |
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252 | |
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253 | // return this object to its previous state. |
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254 | parser = tmp_parser; |
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255 | } |
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256 | else { |
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257 | |
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258 | // parsing the buffer was successful |
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259 | // populate the new data members. |
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260 | |
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261 | tree = scew_parser_tree(parser); |
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262 | freeTree = 0; |
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263 | root = scew_tree_root(tree); |
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264 | |
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265 | // free the current RpLibrary's data |
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266 | // we do the free so far down so we can see if |
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267 | // parsing the other object's xml fails. |
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268 | // if the parsing fails, we can still return this |
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269 | // object to its previous state. |
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270 | if (tmp_tree && tmp_freeTree) { |
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271 | scew_tree_free(tmp_tree); |
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272 | tmp_tree = NULL; |
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273 | } |
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274 | if (tmp_parser) { |
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275 | scew_parser_free(tmp_parser); |
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276 | tmp_parser = NULL; |
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277 | } |
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278 | if (tmp_root) { |
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279 | tmp_root = NULL; |
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280 | } |
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281 | } |
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282 | |
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283 | } // end if (buffer.length() != 0) { |
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284 | } // end if (this != &other) |
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285 | |
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286 | return *this; |
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287 | } // end operator= |
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288 | |
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289 | |
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290 | // default destructor |
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291 | virtual ~RpLibrary () |
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292 | { |
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293 | // clean up dynamic memory |
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294 | |
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295 | if (tree && freeTree) { |
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296 | scew_tree_free(tree); |
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297 | tree = NULL; |
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298 | } |
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299 | if (parser) { |
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300 | scew_parser_free(parser); |
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301 | parser = NULL; |
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302 | } |
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303 | if (root) { |
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304 | // scew_element_free(root); |
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305 | root = NULL; |
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306 | } |
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307 | } |
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308 | |
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309 | private: |
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310 | |
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311 | scew_parser* parser; |
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312 | scew_tree* tree; |
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313 | scew_element* root; |
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314 | |
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315 | // flag to tell if we are responsible for calling scew_tree_free |
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316 | // on the tree structure. if we get our tree by using the |
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317 | // scew_tree_create |
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318 | // fxn, we need to free it. if we get our tree using the |
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319 | // scew_parser_tree |
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320 | // fxn, then it will be free'd when the parser is free'd. |
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321 | int freeTree; |
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322 | |
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323 | |
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324 | RpLibrary ( scew_element* node) |
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325 | : parser (NULL), |
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326 | tree (NULL), |
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327 | root (node) |
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328 | |
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329 | {} |
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330 | |
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331 | |
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332 | std::string _get_attribute(scew_element* element, std::string attributeName); |
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333 | int _path2list (std::string& path, std::string** list, int listLen); |
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334 | std::string _node2name (scew_element* node); |
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335 | std::string _node2comp (scew_element* node); |
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336 | int _splitPath (std::string& path, |
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337 | std::string& tagName, |
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338 | int* idx, |
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339 | std::string& id ); |
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340 | scew_element* _find (std::string path, int create); |
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341 | void print_indent (unsigned int indent, std::stringstream& outString); |
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342 | void print_attributes (scew_element* element, std::stringstream& outString); |
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343 | void print_element( scew_element* element, |
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344 | unsigned int indent, |
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345 | std::stringstream& outString ); |
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346 | |
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347 | |
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348 | }; |
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349 | |
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350 | /*--------------------------------------------------------------------------*/ |
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351 | /*--------------------------------------------------------------------------*/ |
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352 | |
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353 | #endif |
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