1 | /** |
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2 | * |
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3 | * @file element.c |
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4 | * @author Aleix Conchillo Flaque <aleix@member.fsf.org> |
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5 | * @date Mon Nov 25, 2002 00:48 |
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6 | * @brief SCEW element type implementation |
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7 | * |
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8 | * $Id: element.c,v 1.2 2004/02/18 21:51:31 aleix Exp $ |
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9 | * |
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10 | * @if copyright |
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11 | * |
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12 | * Copyright (C) 2002, 2003, 2004 Aleix Conchillo Flaque |
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13 | * |
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14 | * SCEW is free software; you can redistribute it and/or |
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15 | * modify it under the terms of the GNU Lesser General Public |
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16 | * License as published by the Free Software Foundation; either |
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17 | * version 2.1 of the License, or (at your option) any later version. |
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18 | * |
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19 | * SCEW is distributed in the hope that it will be useful, |
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20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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22 | * Lesser General Public License for more details. |
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23 | * |
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24 | * You should have received a copy of the GNU Lesser General Public |
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25 | * License along with this library; if not, write to the Free Software |
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26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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27 | * |
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28 | * @endif |
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29 | */ |
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30 | |
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31 | #include "xelement.h" |
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32 | |
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33 | #include "xerror.h" |
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34 | |
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35 | #include "str.h" |
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36 | |
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37 | #include <assert.h> |
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38 | #include <string.h> |
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39 | |
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40 | |
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41 | scew_element* |
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42 | scew_element_create(XML_Char const* name) |
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43 | { |
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44 | scew_element* element = NULL; |
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45 | |
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46 | assert(name != NULL); |
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47 | |
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48 | element = (scew_element*) calloc(1, sizeof(scew_element)); |
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49 | if (element != NULL) |
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50 | { |
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51 | element->name = scew_strdup(name); |
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52 | element->attributes = attribute_list_create(); |
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53 | } |
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54 | else |
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55 | { |
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56 | set_last_error(scew_error_no_memory); |
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57 | } |
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58 | |
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59 | return element; |
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60 | } |
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61 | |
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62 | void |
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63 | scew_element_free(scew_element* element) |
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64 | { |
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65 | scew_element* left = NULL; |
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66 | scew_element* right = NULL; |
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67 | |
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68 | if (element == NULL) |
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69 | { |
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70 | return; |
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71 | } |
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72 | |
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73 | left = element->left; |
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74 | right = element->right; |
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75 | if (left != NULL) |
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76 | { |
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77 | left->right = right; |
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78 | } |
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79 | if (right != NULL) |
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80 | { |
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81 | right->left = left; |
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82 | } |
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83 | |
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84 | free(element->name); |
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85 | free(element->contents); |
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86 | attribute_list_free(element->attributes); |
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87 | |
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88 | if (element->parent != NULL) |
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89 | { |
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90 | if (element->parent->child == element) |
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91 | { |
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92 | element->parent->child = element->right; |
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93 | } |
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94 | if (element->parent->last_child == element) |
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95 | { |
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96 | element->parent->last_child = element->left; |
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97 | } |
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98 | element->parent->n_children--; |
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99 | } |
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100 | |
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101 | while (element->child != NULL) |
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102 | { |
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103 | scew_element_free(element->child); |
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104 | } |
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105 | |
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106 | free(element); |
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107 | } |
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108 | |
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109 | unsigned int |
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110 | scew_element_count(scew_element const* parent) |
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111 | { |
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112 | assert(parent != NULL); |
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113 | |
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114 | return parent->n_children; |
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115 | } |
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116 | |
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117 | scew_element* |
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118 | scew_element_next(scew_element const* parent, scew_element const* element) |
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119 | { |
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120 | scew_element *next_element; |
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121 | |
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122 | if (element == NULL) |
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123 | { |
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124 | if (parent == NULL) |
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125 | { |
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126 | return NULL; |
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127 | } |
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128 | next_element = parent->child; |
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129 | } |
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130 | else |
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131 | { |
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132 | next_element = element->right; |
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133 | } |
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134 | |
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135 | return next_element; |
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136 | } |
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137 | |
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138 | scew_element* |
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139 | scew_element_by_index(scew_element* parent, unsigned int idx) |
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140 | { |
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141 | unsigned int i = 0; |
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142 | scew_element* element = NULL; |
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143 | |
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144 | assert(parent != NULL); |
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145 | assert(idx < parent->n_children); |
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146 | |
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147 | element = parent->child; |
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148 | for (i = 0; (i < idx) && (element != NULL); ++i) |
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149 | { |
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150 | element = element->right; |
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151 | } |
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152 | |
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153 | return element; |
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154 | } |
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155 | |
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156 | scew_element* |
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157 | scew_element_by_name(scew_element const* parent, XML_Char const* name) |
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158 | { |
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159 | scew_element* element = NULL; |
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160 | |
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161 | assert(parent != NULL); |
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162 | |
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163 | if (name == NULL) |
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164 | { |
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165 | return NULL; |
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166 | } |
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167 | |
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168 | element = scew_element_next(parent, 0); |
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169 | while (element && scew_strcmp(element->name, name)) |
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170 | { |
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171 | element = scew_element_next(parent, element); |
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172 | } |
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173 | |
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174 | return element; |
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175 | } |
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176 | |
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177 | scew_element** |
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178 | scew_element_list(scew_element const* parent, XML_Char const* name, |
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179 | unsigned int* count) |
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180 | { |
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181 | unsigned int curr = 0; |
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182 | unsigned int max = 0; |
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183 | scew_element** list = NULL; |
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184 | scew_element* element; |
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185 | |
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186 | assert(parent != NULL); |
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187 | assert(name != NULL); |
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188 | assert(count != NULL); |
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189 | |
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190 | element = scew_element_next(parent, 0); |
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191 | while (element) |
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192 | { |
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193 | if (!scew_strcmp(element->name, name)) |
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194 | { |
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195 | if (curr >= max) |
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196 | { |
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197 | max = (max + 1) * 2; |
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198 | list = (scew_element**) realloc(list, |
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199 | sizeof(scew_element*) * max); |
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200 | if (!list) |
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201 | { |
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202 | set_last_error(scew_error_no_memory); |
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203 | return NULL; |
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204 | } |
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205 | } |
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206 | list[curr++] = element; |
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207 | } |
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208 | element = scew_element_next(parent, element); |
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209 | } |
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210 | |
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211 | *count = curr; |
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212 | |
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213 | return list; |
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214 | } |
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215 | |
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216 | void |
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217 | scew_element_list_free(scew_element** lst) |
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218 | { |
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219 | free(lst); |
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220 | } |
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221 | |
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222 | XML_Char const* |
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223 | scew_element_name(scew_element const* element) |
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224 | { |
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225 | assert(element != NULL); |
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226 | |
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227 | return element->name; |
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228 | } |
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229 | |
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230 | XML_Char const* |
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231 | scew_element_contents(scew_element const* element) |
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232 | { |
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233 | assert(element != NULL); |
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234 | |
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235 | return element->contents; |
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236 | } |
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237 | |
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238 | XML_Char const* |
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239 | scew_element_set_name(scew_element* element, XML_Char const* name) |
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240 | { |
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241 | assert(element != NULL); |
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242 | assert(name != NULL); |
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243 | |
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244 | free(element->name); |
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245 | element->name = scew_strdup(name); |
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246 | |
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247 | return element->name; |
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248 | } |
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249 | |
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250 | XML_Char const* |
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251 | scew_element_set_contents(scew_element* element, XML_Char const* data) |
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252 | { |
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253 | assert(element != NULL); |
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254 | assert(data != NULL); |
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255 | |
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256 | free(element->contents); |
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257 | element->contents = scew_strdup(data); |
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258 | |
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259 | return element->contents; |
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260 | } |
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261 | |
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262 | scew_element* |
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263 | scew_element_add(scew_element* element, XML_Char const* name) |
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264 | { |
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265 | scew_element* new_elem = scew_element_create(name); |
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266 | |
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267 | return scew_element_add_elem(element, new_elem); |
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268 | } |
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269 | |
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270 | scew_element* |
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271 | scew_element_add_elem(scew_element* element, scew_element* new_elem) |
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272 | { |
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273 | scew_element* current = NULL; |
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274 | |
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275 | assert(element != NULL); |
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276 | assert(new_elem != NULL); |
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277 | |
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278 | element->n_children++; |
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279 | |
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280 | new_elem->parent = element; |
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281 | if (element->child == NULL) |
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282 | { |
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283 | element->child = new_elem; |
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284 | } |
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285 | else |
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286 | { |
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287 | current = element->last_child; |
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288 | current->right = new_elem; |
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289 | new_elem->left = current; |
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290 | } |
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291 | element->last_child = new_elem; |
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292 | |
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293 | return new_elem; |
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294 | } |
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295 | |
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296 | void |
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297 | scew_element_del(scew_element* element) |
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298 | { |
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299 | scew_element_free(element); |
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300 | } |
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301 | |
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302 | void |
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303 | scew_element_del_by_name(scew_element* element, XML_Char const* name) |
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304 | { |
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305 | scew_element_free(scew_element_by_name(element, name)); |
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306 | } |
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307 | |
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308 | void |
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309 | scew_element_del_by_index(scew_element* element, unsigned int idx) |
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310 | { |
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311 | scew_element_free(scew_element_by_index(element, idx)); |
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312 | } |
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313 | |
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314 | void |
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315 | scew_element_list_del(scew_element* element, XML_Char const* name) |
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316 | { |
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317 | unsigned int i = 0; |
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318 | unsigned int count = 0; |
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319 | scew_element** list = NULL; |
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320 | |
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321 | if ((element == NULL) || (name == NULL)) |
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322 | { |
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323 | return; |
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324 | } |
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325 | |
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326 | list = scew_element_list(element, name, &count); |
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327 | if (list == NULL) |
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328 | { |
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329 | return; |
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330 | } |
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331 | |
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332 | for (i = 0; i < count; i++) |
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333 | { |
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334 | scew_element_free(list[i]); |
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335 | } |
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336 | scew_element_list_free(list); |
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337 | } |
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338 | |
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339 | scew_attribute* |
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340 | scew_element_add_attr(scew_element* element, scew_attribute* attribute) |
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341 | { |
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342 | return attribute_list_add(element->attributes, attribute); |
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343 | } |
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344 | |
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345 | scew_attribute* |
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346 | scew_element_add_attr_pair(scew_element* element, XML_Char const* name, |
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347 | XML_Char const* value) |
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348 | { |
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349 | scew_attribute* attribute = scew_attribute_create(name, value); |
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350 | |
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351 | return attribute_list_add(element->attributes, attribute); |
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352 | } |
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353 | |
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354 | void |
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355 | scew_element_del_attr(scew_element* element, XML_Char const* name) |
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356 | { |
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357 | attribute_list_del(element->attributes, name); |
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358 | } |
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