Sun, 21 May 2023 11:52:06 +0200
fix dav-sync crash
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2018 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <stdio.h> |
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30 | #include <stdlib.h> |
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31 | #include <string.h> |
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32 | |
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33 | #include <cx/utils.h> |
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34 | #include <cx/printf.h> |
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35 | |
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36 | #include "xml.h" |
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37 | |
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38 | static DavXmlNodeType convert_type(xmlElementType type) { |
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39 | DavXmlNodeType ct; |
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40 | switch(type) { |
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41 | default: ct = DAV_XML_NONE; break; |
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42 | case XML_ELEMENT_NODE: ct = DAV_XML_ELEMENT; break; |
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43 | case XML_TEXT_NODE: ct = DAV_XML_TEXT; |
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44 | } |
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45 | return ct; |
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46 | } |
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47 | |
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48 | typedef struct { |
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49 | xmlNode *node; |
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50 | DavXmlNode *parent; |
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51 | } ConvXmlElm; |
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52 | |
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53 | DavXmlNode* dav_convert_xml(DavSession *sn, xmlNode *node) { |
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54 | if(!node) { |
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55 | return NULL; |
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56 | } |
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57 | DavXmlNodeType newnt = convert_type(node->type); |
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58 | if(newnt == DAV_XML_NONE) { |
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59 | return NULL; |
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60 | } |
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61 | |
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62 | const CxAllocator *a = sn->mp->allocator; |
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63 | |
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64 | ConvXmlElm ce; |
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65 | ce.node = node; |
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66 | ce.parent = NULL; |
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67 | CxList *stack = cxLinkedListCreate(cxDefaultAllocator, NULL, sizeof(ConvXmlElm)); |
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68 | if(!stack) { |
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69 | return NULL; |
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70 | } |
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71 | cxListInsert(stack, 0, &ce); |
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72 | |
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73 | DavXmlNode *ret = NULL; |
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74 | |
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75 | while(stack->size > 0) { |
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76 | ConvXmlElm *c = cxListAt(stack, 0); |
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77 | cxListRemove(stack, 0); |
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78 | |
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79 | xmlNode *n = c->node; |
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80 | DavXmlNode *prev = NULL; |
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81 | while(n) { |
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82 | DavXmlNode *newxn = cxCalloc(a, 1, sizeof(DavXmlNode)); |
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83 | if(!ret) { |
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84 | ret = newxn; |
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85 | } |
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86 | newxn->type = convert_type(n->type); |
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87 | newxn->parent = c->parent; |
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88 | if(c->parent && !c->parent->children) { |
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89 | c->parent->children = newxn; |
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90 | } |
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91 | newxn->prev = prev; |
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92 | if(prev) { |
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93 | prev->next = newxn; |
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94 | } |
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95 | |
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96 | if(newxn->type == DAV_XML_ELEMENT) { |
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97 | newxn->name = dav_session_strdup(sn, (char*)n->name); |
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98 | if(n->ns && n->ns->href) { |
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99 | newxn->namespace = dav_session_strdup(sn, (char*)n->ns->href); |
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100 | } |
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101 | |
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102 | xmlAttr *attr = n->properties; |
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103 | DavXmlAttr *newattr = NULL; |
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104 | DavXmlAttr *newattr_last = NULL; |
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105 | while(attr) { |
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106 | DavXmlAttr *na = cxCalloc(a, 1, sizeof(DavXmlAttr)); |
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107 | na->name = dav_session_strdup(sn, (char*)attr->name); |
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108 | if(attr->children && attr->children->type == XML_TEXT_NODE) { |
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109 | na->value = dav_session_strdup(sn, (char*)attr->children->content); |
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110 | } |
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111 | if(!newattr) { |
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112 | newattr = na; |
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113 | } else { |
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114 | newattr_last->next = na; |
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115 | } |
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116 | newattr_last = na; |
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117 | |
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118 | attr = attr->next; |
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119 | } |
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120 | newxn->attributes = newattr; |
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121 | |
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122 | if(n->children) { |
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123 | ConvXmlElm convc; |
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124 | convc.node = n->children; |
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125 | convc.parent = newxn; |
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126 | cxListInsert(stack, 0, &convc); |
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127 | } |
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128 | } else if(newxn->type == DAV_XML_TEXT) { |
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129 | cxmutstr content = cx_strdup_a(a, cx_str((char*)n->content)); |
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130 | newxn->content = content.ptr; |
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131 | newxn->contentlength = content.length; |
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132 | } |
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133 | |
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134 | prev = newxn; |
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135 | n = n->next; |
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136 | } |
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137 | } |
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138 | |
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139 | return ret; |
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140 | } |
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141 | |
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142 | void dav_print_xml(DavXmlNode *node) { |
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143 | if(node->type == DAV_XML_ELEMENT) { |
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144 | printf("<%s", node->name); |
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145 | DavXmlAttr *attr = node->attributes; |
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146 | while(attr) { |
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147 | printf(" %s=\"%s\"", attr->name, attr->value); |
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148 | attr = attr->next; |
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149 | } |
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150 | putchar('>'); |
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151 | |
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152 | DavXmlNode *child = node->children; |
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153 | if(child) { |
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154 | dav_print_xml(child); |
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155 | } |
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156 | |
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157 | printf("</%s>", node->name); |
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158 | } else { |
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159 | fwrite(node->content, 1, node->contentlength, stdout); |
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160 | fflush(stdout); |
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161 | } |
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162 | if(node->next) { |
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163 | dav_print_xml(node->next); |
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164 | } |
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165 | } |
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166 | |
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167 | void dav_print_node(void *stream, cx_write_func writef, CxMap *nsmap, DavXmlNode *node) { |
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168 | while(node) { |
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169 | if(node->type == DAV_XML_ELEMENT) { |
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170 | char *tagend = node->children ? ">" : " />"; |
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171 | char *prefix = NULL; |
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172 | char *prefix_fr = NULL; |
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173 | if(node->namespace) { |
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174 | prefix = cxMapGet(nsmap, cx_hash_key_str(node->namespace)); |
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175 | if(!prefix) { |
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176 | cxmutstr newpre = cx_asprintf("x%d", (int)nsmap->size+1); |
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177 | // TODO: fix namespace declaration |
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178 | //ucx_map_cstr_put(nsmap, node->namespace, newpre.ptr); |
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179 | prefix = newpre.ptr; |
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180 | prefix_fr = prefix; |
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181 | cx_fprintf( |
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182 | stream, |
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183 | writef, |
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184 | "<%s:%s xmlns:%s=\"%s\"", |
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185 | prefix, |
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186 | node->name, |
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187 | prefix, |
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188 | node->namespace); |
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189 | } else { |
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190 | cx_fprintf(stream, writef, "<%s:%s", prefix, node->name); |
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191 | } |
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192 | } else { |
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193 | cx_fprintf(stream, writef, "<%s", node->name); |
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194 | } |
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195 | |
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196 | DavXmlAttr *attr = node->attributes; |
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197 | while(attr) { |
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198 | cx_fprintf(stream, writef, " %s=\"%s\"", attr->name, attr->value); |
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199 | attr = attr->next; |
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200 | } |
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201 | writef(tagend, 1, strlen(tagend), stream); // end xml tag |
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202 | |
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203 | if(node->children) { |
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204 | dav_print_node(stream, writef, nsmap, node->children); |
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205 | if(prefix) { |
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206 | cx_fprintf(stream, writef, "</%s:%s>", prefix, node->name); |
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207 | } else { |
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208 | cx_fprintf(stream, writef, "</%s>", node->name); |
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209 | } |
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210 | } |
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211 | |
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212 | if(prefix_fr) { |
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213 | free(prefix_fr); |
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214 | } |
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215 | } else if(node->type == DAV_XML_TEXT) { |
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216 | writef(node->content, 1, node->contentlength, stream); |
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217 | } |
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218 | |
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219 | node = node->next; |
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220 | } |
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221 | } |
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222 | |
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223 | /* ------------------------- public API ------------------------- */ |
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224 | |
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225 | char* dav_xml_getstring(DavXmlNode *node) { |
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226 | if(node && node->type == DAV_XML_TEXT) { |
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227 | return node->content; |
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228 | } else { |
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229 | return NULL; |
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230 | } |
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231 | } |
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232 | |
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233 | DavBool dav_xml_isstring(DavXmlNode *node) { |
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234 | if(node && node->type == DAV_XML_TEXT && !node->next) { |
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235 | return TRUE; |
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236 | } else { |
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237 | return FALSE; |
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238 | } |
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239 | } |
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240 | |
373
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241 | DavXmlNode* dav_xml_nextelm(DavXmlNode *node) { |
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242 | node = node->next; |
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243 | while(node) { |
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244 | if(node->type == DAV_XML_ELEMENT) { |
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245 | return node; |
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246 | } |
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247 | node = node->next; |
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248 | } |
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249 | return NULL; |
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250 | } |
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251 | |
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252 | DavXmlNode* dav_text_node(DavSession *sn, const char *text) { |
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253 | const CxAllocator *a = sn->mp->allocator; |
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254 | DavXmlNode *newxn = cxCalloc(a, 1, sizeof(DavXmlNode)); |
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255 | newxn->type = DAV_XML_TEXT; |
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256 | cxmutstr content = cx_strdup_a(a, cx_str(text)); |
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257 | newxn->content = content.ptr; |
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258 | newxn->contentlength = content.length; |
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259 | return newxn; |
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260 | } |
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261 | |
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262 | DavXmlNode* dav_text_element(DavSession *sn, const char *ns, const char *name, const char *text) { |
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263 | const CxAllocator *a = sn->mp->allocator; |
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264 | DavXmlNode *newelm = cxCalloc(a, 1, sizeof(DavXmlNode)); |
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265 | newelm->type = DAV_XML_ELEMENT; |
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266 | newelm->namespace = cx_strdup_a(a, cx_str(ns)).ptr; |
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267 | newelm->name = cx_strdup_a(a, cx_str(name)).ptr; |
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268 | newelm->children = dav_text_node(sn, text); |
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269 | return newelm; |
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270 | } |
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271 | |
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272 | static void dav_free_xml_node_a(const CxAllocator *a, DavXmlNode *node) { |
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273 | if(node->name) cxFree(a, node->name); |
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274 | if(node->namespace) cxFree(a, node->namespace); |
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275 | if(node->content) cxFree(a, node->content); |
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276 | DavXmlAttr *attr = node->attributes; |
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277 | while(attr) { |
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278 | if(attr->name) cxFree(a, attr->name); |
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279 | if(attr->value) cxFree(a, attr->value); |
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280 | attr = attr->next; |
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281 | } |
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282 | DavXmlNode *children = node->children; |
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283 | while(children) { |
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284 | DavXmlNode *next_ch = children->next; |
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285 | dav_free_xml_node_a(a, children); |
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286 | children = next_ch; |
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287 | } |
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288 | cxFree(a, node); |
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289 | } |
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290 | |
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291 | void dav_free_xml_node_sn(DavSession *sn, DavXmlNode *node) { |
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292 | dav_free_xml_node_a(sn->mp->allocator, node); |
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293 | } |
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294 | |
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295 | void dav_free_xml_node(DavXmlNode *node) { |
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296 | dav_free_xml_node_a(cxDefaultAllocator, node); |
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297 | } |
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298 | |
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299 | DavXmlAttr* dav_copy_xml_attr(DavXmlAttr *attr) { |
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300 | if(!attr) { |
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301 | return NULL; |
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302 | } |
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303 | DavXmlAttr *newattr = NULL; |
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304 | DavXmlAttr *prev = NULL; |
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305 | while(attr) { |
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306 | DavXmlAttr *n = calloc(1, sizeof(DavXmlAttr)); |
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307 | n->name = strdup(attr->name); |
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308 | n->value = strdup(attr->value); |
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309 | if(prev) { |
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310 | prev->next = n; |
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311 | } else { |
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312 | newattr = n; |
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313 | } |
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314 | prev = n; |
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315 | attr = attr->next; |
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316 | } |
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317 | return newattr; |
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318 | } |
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319 | |
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320 | DavXmlNode* dav_copy_node(DavXmlNode *node) { |
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321 | DavXmlNode *ret = NULL; |
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322 | DavXmlNode *prev = NULL; |
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323 | while(node) { |
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324 | DavXmlNode *copy = calloc(1, sizeof(DavXmlNode)); |
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325 | copy->type = node->type; |
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326 | if(node->type == DAV_XML_ELEMENT) { |
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327 | copy->namespace = strdup(node->namespace); |
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328 | copy->name = strdup(node->name); |
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329 | copy->children = dav_copy_node(node->children); |
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330 | copy->attributes = dav_copy_xml_attr(node->attributes); |
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331 | } else { |
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332 | copy->contentlength = node->contentlength; |
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333 | copy->content = malloc(node->contentlength+1); |
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334 | memcpy(copy->content, node->content, node->contentlength); |
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335 | copy->content[copy->contentlength] = 0; |
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336 | } |
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337 | if(!ret) { |
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338 | ret = copy; |
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339 | } |
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340 | if(prev) { |
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341 | prev->next = copy; |
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342 | copy->prev = prev; |
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343 | } |
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344 | prev = copy; |
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345 | node = node->next; |
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346 | } |
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347 | return ret; |
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348 | } |
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349 | |
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350 | |
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351 | DavXmlNode* dav_xml_createnode(const char *ns, const char *name) { |
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352 | DavXmlNode *node = calloc(1, sizeof(DavXmlNode)); |
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353 | node->type = DAV_XML_ELEMENT; |
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354 | node->namespace = strdup(ns); |
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355 | node->name = strdup(name); |
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356 | return node; |
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357 | } |
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358 | |
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359 | DavXmlNode* dav_xml_createnode_with_text(const char *ns, const char *name, const char *text) { |
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360 | DavXmlNode *node = calloc(1, sizeof(DavXmlNode)); |
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361 | node->type = DAV_XML_ELEMENT; |
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362 | node->namespace = strdup(ns); |
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363 | node->name = strdup(name); |
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364 | |
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365 | DavXmlNode *textnode = dav_xml_createtextnode(text); |
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366 | node->children = textnode; |
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367 | |
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368 | return node; |
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369 | } |
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370 | |
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371 | DavXmlNode* dav_xml_createtextnode(const char *text) { |
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372 | DavXmlNode *node = calloc(1, sizeof(DavXmlNode)); |
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373 | node->type = DAV_XML_TEXT; |
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374 | cxmutstr content = cx_strdup(cx_str((char*)text)); |
361
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375 | node->content = content.ptr; |
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376 | node->contentlength = content.length; |
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377 | return node; |
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378 | } |
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379 | |
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380 | void dav_xml_add_child(DavXmlNode *node, DavXmlNode *child) { |
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381 | DavXmlNode *last_child = NULL; |
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382 | DavXmlNode *c = node->children; |
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383 | while(c) { |
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384 | last_child = c; |
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385 | c = c->next; |
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386 | } |
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387 | if(last_child) { |
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388 | last_child->next = child; |
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389 | child->prev = last_child; |
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390 | } else { |
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391 | node->children = child; |
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392 | } |
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393 | } |
371
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394 | |
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395 | void dav_xml_add_attr(DavXmlNode *node, const char *name, const char *value) { |
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396 | DavXmlAttr *attr = calloc(1, sizeof(DavXmlAttr)); |
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397 | attr->name = strdup(name); |
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398 | attr->value = strdup(value); |
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399 | |
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400 | if(node->attributes) { |
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401 | DavXmlAttr *last; |
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402 | DavXmlAttr *end = node->attributes; |
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403 | while(end) { |
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404 | last = end; |
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405 | end = end->next; |
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406 | } |
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407 | last->next = attr; |
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408 | } else { |
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409 | node->attributes = attr; |
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410 | } |
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411 | } |
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412 | |
526
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413 | char* dav_xml_get_attr(DavXmlNode *node, const char *name) { |
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414 | DavXmlAttr *attr = node->attributes; |
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415 | while(attr) { |
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416 | if(!strcmp(attr->name, name)) { |
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417 | return attr->value; |
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418 | } |
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419 | |
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420 | attr = attr->next; |
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421 | } |
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422 | return NULL; |
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423 | } |
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424 | |
371
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425 | DavXmlNode* dav_parse_xml(DavSession *sn, const char *str, size_t len) { |
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426 | xmlDoc *doc = xmlReadMemory(str, len, NULL, NULL, 0); |
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427 | if(!doc) { |
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428 | return NULL; |
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429 | } |
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430 | xmlNode *xml_root = xmlDocGetRootElement(doc); |
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431 | if(!xml_root) { |
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432 | xmlFreeDoc(doc); |
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433 | return NULL; |
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434 | } |
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435 | DavXmlNode *x = dav_convert_xml(sn, xml_root); |
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436 | xmlFreeDoc(doc); |
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437 | return x; |
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438 | } |