Mercurial > ~mikael > mcabber > hg

annotate mcabber/libjabber/expat.c @ 946:5c1dfc8e54d7 0.8.0

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Ready for release 0.8.0
author Mikael Berthe <mikael@lilotux.net>
date Sun, 13 Aug 2006 21:01:30 +0200
parents c3ae9251c197
children
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1 /*
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2 * This program is free software; you can redistribute it and/or modify
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3 * it under the terms of the GNU General Public License as published by
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4 * the Free Software Foundation; either version 2 of the License, or
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5 * (at your option) any later version.
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6 *
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7 * This program is distributed in the hope that it will be useful,
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8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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10 * GNU General Public License for more details.
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11 *
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12 * You should have received a copy of the GNU General Public License
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13 * along with this program; if not, write to the Free Software
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14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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15 *
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16 * Jabber
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17 * Copyright (C) 1998-1999 The Jabber Team http://jabber.org/
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18 */
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19
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20 #include <libxode.h>
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21
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22 /**
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23 * callback function used for start elements
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24 *
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25 * This function is used internally by expat.c as a callback function
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26 * given to expat. It will create a new xmlnode and add it to the
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27 * already created xmlnode tree.
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28 *
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29 * @param userdata pointer to the parent xmlnode instance (NULL if this function is called for the root note)
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30 * @param name name of the starting element
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31 * @param atts attributes that are contained in the start element
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32 */
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33 void expat_startElement(void* userdata, const char* name, const char** atts)
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34 {
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35 /* get the xmlnode pointed to by the userdata */
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36 xmlnode *x = userdata;
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37 xmlnode current = *x;
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38
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39 if (current == NULL)
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40 {
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41 /* allocate a base node */
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42 current = xmlnode_new_tag(name);
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43 xmlnode_put_expat_attribs(current, atts);
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44 *x = current;
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45 }
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46 else
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47 {
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48 *x = xmlnode_insert_tag(current, name);
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49 xmlnode_put_expat_attribs(*x, atts);
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50 }
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51 }
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52
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53 /**
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54 * callback function used for end elements
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55 *
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56 * This function is used internally by expat.c as a callback function
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57 * given to expat. It will complete an xmlnode and update the userdata pointer
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58 * to point to the node that is parent of the next starting element.
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59 *
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60 * @param userdata pointer to the current xmlnode
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61 * @param name name of the ending element (ignored by this function)
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62 */
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63 void expat_endElement(void* userdata, const char* name)
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64 {
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65 xmlnode *x = userdata;
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66 xmlnode current = *x;
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67
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68 current->complete = 1;
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69 current = xmlnode_get_parent(current);
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70
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71 /* if it's NULL we've hit the top folks, otherwise back up a level */
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72 if(current != NULL)
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73 *x = current;
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74 }
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75
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76 /**
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77 * callback function for CDATA nodes
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78 *
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79 * This function will insert CDATA in an xmlnode
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80 *
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81 * @param userdata pointer to the current xmlnode
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82 * @param s pointer to the CDATA string (not zero terminated!)
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83 * @param len length of the CDATA string
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84 */
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85 void expat_charData(void* userdata, const char* s, int len)
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86 {
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87 xmlnode *x = userdata;
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88 xmlnode current = *x;
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89
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90 xmlnode_insert_cdata(current, s, len);
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91 }
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92
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93 /**
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94 * create an xmlnode instance (possibly including other xmlnode instances) by parsing a string
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95 *
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96 * This function will parse a string containing an XML document and create an xmlnode graph
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97 *
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98 * @param str the string containing the XML document (not necessarily zero terminated)
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99 * @param len the length of the string (without the zero byte, if present)
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100 * @return the graph of xmlnodes that represent the parsed document, NULL on failure
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101 */
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102 xmlnode xmlnode_str(char *str, int len)
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103 {
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104 XML_Parser p;
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105 xmlnode *x, node; /* pointer to an xmlnode */
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106
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107 if(NULL == str)
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108 return NULL;
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109
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110 x = malloc(sizeof(void *));
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111
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112 *x = NULL; /* pointer to NULL */
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113 p = XML_ParserCreate(NULL);
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114 XML_SetUserData(p, x);
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115 XML_SetElementHandler(p, expat_startElement, expat_endElement);
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116 XML_SetCharacterDataHandler(p, expat_charData);
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117 if(!XML_Parse(p, str, len, 1))
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118 {
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119 /* jdebug(ZONE,"xmlnode_str_error: %s",(char *)XML_ErrorString(XML_GetErrorCode(p)));*/
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120 xmlnode_free(*x);
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121 *x = NULL;
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122 }
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123 node = *x;
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124 free(x);
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125 XML_ParserFree(p);
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126 return node; /* return the xmlnode x points to */
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127 }
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128
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129 /**
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130 * create an xmlnode instance (possibly including other xmlnode instances) by parsing a file
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131 *
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132 * This function will parse a file containing an XML document and create an xmlnode graph
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133 *
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134 * @param file the filename
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135 * @return the graph of xmlnodes that represent the parsed document, NULL on failure
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136 */
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137 xmlnode xmlnode_file(char *file)
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138 {
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139 XML_Parser p;
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140 xmlnode *x, node; /* pointer to an xmlnode */
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141 char buf[BUFSIZ];
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142 int done, fd, len;
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143
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144 if(NULL == file)
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145 return NULL;
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146
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147 fd = open(file,O_RDONLY);
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148 if(fd < 0)
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149 return NULL;
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150
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151 x = malloc(sizeof(void *));
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152
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153 *x = NULL; /* pointer to NULL */
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154 p = XML_ParserCreate(NULL);
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155 XML_SetUserData(p, x);
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156 XML_SetElementHandler(p, expat_startElement, expat_endElement);
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157 XML_SetCharacterDataHandler(p, expat_charData);
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158 do{
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159 len = read(fd, buf, BUFSIZ);
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160 done = len < BUFSIZ;
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161 if(!XML_Parse(p, buf, len, done))
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162 {
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163 /* jdebug(ZONE,"xmlnode_file_parseerror: %s",(char *)XML_ErrorString(XML_GetErrorCode(p)));*/
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164 xmlnode_free(*x);
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165 *x = NULL;
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166 done = 1;
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167 }
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168 }while(!done);
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169
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170 node = *x;
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171 XML_ParserFree(p);
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172 free(x);
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173 close(fd);
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174 return node; /* return the xmlnode x points to */
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175 }
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176
417
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177 /**
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178 * write an xmlnode to a file (without a size limit)
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179 *
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180 * @param file the target file
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181 * @param node the xmlnode that should be written
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182 * @return 1 on success, -1 on failure
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183 */
25
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184 int xmlnode2file(char *file, xmlnode node)
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185 {
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186 return xmlnode2file_limited(file, node, 0);
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187 }
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188
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189 /**
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190 * write an xmlnode to a file, limited by size
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191 *
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192 * @param file the target file
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193 * @param node the xmlnode that should be written
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194 * @param sizelimit the maximum length of the file to be written
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195 * @return 1 on success, 0 if failed due to size limit, -1 on failure
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196 */
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197 int xmlnode2file_limited(char *file, xmlnode node, size_t sizelimit)
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198 {
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199 char *doc, *ftmp;
25
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200 int fd, i;
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201 size_t doclen;
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202
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203 if(file == NULL || node == NULL)
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204 return -1;
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205
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206 ftmp = spools(xmlnode_pool(node),file,".t.m.p",xmlnode_pool(node));
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207 fd = open(ftmp, O_CREAT | O_WRONLY | O_TRUNC, 0600);
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208 if(fd < 0)
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209 return -1;
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210
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211 doc = xmlnode2str(node);
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212 doclen = strlen(doc);
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213
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214 if (sizelimit > 0 && doclen > sizelimit)
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215 {
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216 close(fd);
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217 return 0;
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218 }
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219
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220 i = write(fd,doc,doclen);
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221 if(i < 0)
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222 return -1;
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223
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224 close(fd);
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225
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226 if(rename(ftmp,file) < 0)
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227 {
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228 unlink(ftmp);
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229 return -1;
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230 }
25
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231 return 1;
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232 }
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233
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234 /**
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235 * append attributes in the expat format to an existing xmlnode
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236 *
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237 * @param owner where to add the attributes
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238 * @param atts the attributes in expat format (even indexes are the attribute names, odd indexes the values)
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239 */
25
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240 void xmlnode_put_expat_attribs(xmlnode owner, const char** atts)
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241 {
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242 int i = 0;
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243 if (atts == NULL) return;
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244 while (atts[i] != '\0')
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245 {
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246 xmlnode_put_attrib(owner, atts[i], atts[i+1]);
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247 i += 2;
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248 }
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249 }