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25
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1 /*
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2 The contents of this file are subject to the Mozilla Public License
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3 Version 1.1 (the "License"); you may not use this file except in
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4 compliance with the License. You may obtain a copy of the License at
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5 http://www.mozilla.org/MPL/
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6
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7 Software distributed under the License is distributed on an "AS IS"
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8 basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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9 License for the specific language governing rights and limitations
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10 under the License.
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11
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12 The Original Code is expat.
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13
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14 The Initial Developer of the Original Code is James Clark.
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15 Portions created by James Clark are Copyright (C) 1998, 1999
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16 James Clark. All Rights Reserved.
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17
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18 Contributor(s):
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19
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20 Alternatively, the contents of this file may be used under the terms
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21 of the GNU General Public License (the "GPL"), in which case the
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22 provisions of the GPL are applicable instead of those above. If you
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23 wish to allow use of your version of this file only under the terms of
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24 the GPL and not to allow others to use your version of this file under
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25 the MPL, indicate your decision by deleting the provisions above and
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26 replace them with the notice and other provisions required by the
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27 GPL. If you do not delete the provisions above, a recipient may use
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28 your version of this file under either the MPL or the GPL.
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29 */
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30
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31 #ifndef XmlParse_INCLUDED
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32 #define XmlParse_INCLUDED 1
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33
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34 #ifdef __cplusplus
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35 extern "C" {
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36 #endif
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37
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38 #ifndef XMLPARSEAPI
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39 #define XMLPARSEAPI /* as nothing */
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40 #endif
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41
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42 typedef void *XML_Parser;
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43
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44 #ifdef XML_UNICODE_WCHAR_T
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45
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46 /* XML_UNICODE_WCHAR_T will work only if sizeof(wchar_t) == 2 and wchar_t
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47 uses Unicode. */
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48 /* Information is UTF-16 encoded as wchar_ts */
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49
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50 #ifndef XML_UNICODE
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51 #define XML_UNICODE
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52 #endif
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53
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54 #include <stddef.h>
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55 typedef wchar_t XML_Char;
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56 typedef wchar_t XML_LChar;
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57
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58 #else /* not XML_UNICODE_WCHAR_T */
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59
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60 #ifdef XML_UNICODE
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61
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62 /* Information is UTF-16 encoded as unsigned shorts */
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63 typedef unsigned short XML_Char;
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64 typedef char XML_LChar;
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65
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66 #else /* not XML_UNICODE */
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67
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68 /* Information is UTF-8 encoded. */
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69 typedef char XML_Char;
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70 typedef char XML_LChar;
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71
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72 #endif /* not XML_UNICODE */
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73
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74 #endif /* not XML_UNICODE_WCHAR_T */
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75
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76
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77 /* Constructs a new parser; encoding is the encoding specified by the external
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78 protocol or null if there is none specified. */
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79
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80 XML_Parser XMLPARSEAPI
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81 XML_ParserCreate(const XML_Char *encoding);
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82
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83 /* Constructs a new parser and namespace processor. Element type names
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84 and attribute names that belong to a namespace will be expanded;
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85 unprefixed attribute names are never expanded; unprefixed element type
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86 names are expanded only if there is a default namespace. The expanded
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87 name is the concatenation of the namespace URI, the namespace separator character,
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88 and the local part of the name. If the namespace separator is '\0' then
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89 the namespace URI and the local part will be concatenated without any
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90 separator. When a namespace is not declared, the name and prefix will be
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91 passed through without expansion. */
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92
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93 XML_Parser XMLPARSEAPI
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94 XML_ParserCreateNS(const XML_Char *encoding, XML_Char namespaceSeparator);
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95
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96
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97 /* atts is array of name/value pairs, terminated by 0;
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98 names and values are 0 terminated. */
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99
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100 typedef void (*XML_StartElementHandler)(void *userData,
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101 const XML_Char *name,
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102 const XML_Char **atts);
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103
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104 typedef void (*XML_EndElementHandler)(void *userData,
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105 const XML_Char *name);
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106
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107 /* s is not 0 terminated. */
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108 typedef void (*XML_CharacterDataHandler)(void *userData,
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109 const XML_Char *s,
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110 int len);
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111
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112 /* target and data are 0 terminated */
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113 typedef void (*XML_ProcessingInstructionHandler)(void *userData,
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114 const XML_Char *target,
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115 const XML_Char *data);
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116
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117 /* data is 0 terminated */
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118 typedef void (*XML_CommentHandler)(void *userData, const XML_Char *data);
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119
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120 typedef void (*XML_StartCdataSectionHandler)(void *userData);
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121 typedef void (*XML_EndCdataSectionHandler)(void *userData);
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122
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123 /* This is called for any characters in the XML document for
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124 which there is no applicable handler. This includes both
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125 characters that are part of markup which is of a kind that is
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126 not reported (comments, markup declarations), or characters
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127 that are part of a construct which could be reported but
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128 for which no handler has been supplied. The characters are passed
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129 exactly as they were in the XML document except that
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130 they will be encoded in UTF-8. Line boundaries are not normalized.
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131 Note that a byte order mark character is not passed to the default handler.
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132 There are no guarantees about how characters are divided between calls
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133 to the default handler: for example, a comment might be split between
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134 multiple calls. */
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135
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136 typedef void (*XML_DefaultHandler)(void *userData,
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137 const XML_Char *s,
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138 int len);
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139
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140 /* This is called for a declaration of an unparsed (NDATA)
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141 entity. The base argument is whatever was set by XML_SetBase.
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142 The entityName, systemId and notationName arguments will never be null.
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143 The other arguments may be. */
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144
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145 typedef void (*XML_UnparsedEntityDeclHandler)(void *userData,
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146 const XML_Char *entityName,
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147 const XML_Char *base,
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148 const XML_Char *systemId,
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149 const XML_Char *publicId,
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150 const XML_Char *notationName);
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151
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152 /* This is called for a declaration of notation.
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153 The base argument is whatever was set by XML_SetBase.
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154 The notationName will never be null. The other arguments can be. */
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155
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156 typedef void (*XML_NotationDeclHandler)(void *userData,
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157 const XML_Char *notationName,
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158 const XML_Char *base,
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159 const XML_Char *systemId,
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160 const XML_Char *publicId);
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161
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162 /* When namespace processing is enabled, these are called once for
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163 each namespace declaration. The call to the start and end element
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164 handlers occur between the calls to the start and end namespace
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165 declaration handlers. For an xmlns attribute, prefix will be null.
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166 For an xmlns="" attribute, uri will be null. */
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167
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168 typedef void (*XML_StartNamespaceDeclHandler)(void *userData,
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169 const XML_Char *prefix,
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170 const XML_Char *uri);
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171
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172 typedef void (*XML_EndNamespaceDeclHandler)(void *userData,
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173 const XML_Char *prefix);
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174
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175 /* This is called if the document is not standalone (it has an
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176 external subset or a reference to a parameter entity, but does not
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177 have standalone="yes"). If this handler returns 0, then processing
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178 will not continue, and the parser will return a
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179 XML_ERROR_NOT_STANDALONE error. */
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180
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181 typedef int (*XML_NotStandaloneHandler)(void *userData);
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182
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183 /* This is called for a reference to an external parsed general entity.
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184 The referenced entity is not automatically parsed.
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185 The application can parse it immediately or later using
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186 XML_ExternalEntityParserCreate.
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187 The parser argument is the parser parsing the entity containing the reference;
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188 it can be passed as the parser argument to XML_ExternalEntityParserCreate.
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189 The systemId argument is the system identifier as specified in the entity declaration;
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190 it will not be null.
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191 The base argument is the system identifier that should be used as the base for
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192 resolving systemId if systemId was relative; this is set by XML_SetBase;
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193 it may be null.
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194 The publicId argument is the public identifier as specified in the entity declaration,
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195 or null if none was specified; the whitespace in the public identifier
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196 will have been normalized as required by the XML spec.
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197 The context argument specifies the parsing context in the format
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198 expected by the context argument to
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199 XML_ExternalEntityParserCreate; context is valid only until the handler
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200 returns, so if the referenced entity is to be parsed later, it must be copied.
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201 The handler should return 0 if processing should not continue because of
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202 a fatal error in the handling of the external entity.
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203 In this case the calling parser will return an XML_ERROR_EXTERNAL_ENTITY_HANDLING
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204 error.
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205 Note that unlike other handlers the first argument is the parser, not userData. */
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206
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207 typedef int (*XML_ExternalEntityRefHandler)(XML_Parser parser,
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208 const XML_Char *context,
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209 const XML_Char *base,
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210 const XML_Char *systemId,
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211 const XML_Char *publicId);
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212
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213 /* This structure is filled in by the XML_UnknownEncodingHandler
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214 to provide information to the parser about encodings that are unknown
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215 to the parser.
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216 The map[b] member gives information about byte sequences
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217 whose first byte is b.
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218 If map[b] is c where c is >= 0, then b by itself encodes the Unicode scalar value c.
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219 If map[b] is -1, then the byte sequence is malformed.
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220 If map[b] is -n, where n >= 2, then b is the first byte of an n-byte
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221 sequence that encodes a single Unicode scalar value.
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222 The data member will be passed as the first argument to the convert function.
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223 The convert function is used to convert multibyte sequences;
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224 s will point to a n-byte sequence where map[(unsigned char)*s] == -n.
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225 The convert function must return the Unicode scalar value
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226 represented by this byte sequence or -1 if the byte sequence is malformed.
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227 The convert function may be null if the encoding is a single-byte encoding,
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228 that is if map[b] >= -1 for all bytes b.
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229 When the parser is finished with the encoding, then if release is not null,
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230 it will call release passing it the data member;
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231 once release has been called, the convert function will not be called again.
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232
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233 Expat places certain restrictions on the encodings that are supported
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234 using this mechanism.
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235
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236 1. Every ASCII character that can appear in a well-formed XML document,
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237 other than the characters
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238
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239 $@\^`{}~
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240
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241 must be represented by a single byte, and that byte must be the
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242 same byte that represents that character in ASCII.
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243
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244 2. No character may require more than 4 bytes to encode.
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245
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246 3. All characters encoded must have Unicode scalar values <= 0xFFFF,
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247 (ie characters that would be encoded by surrogates in UTF-16
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248 are not allowed). Note that this restriction doesn't apply to
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249 the built-in support for UTF-8 and UTF-16.
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250
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251 4. No Unicode character may be encoded by more than one distinct sequence
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252 of bytes. */
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253
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254 typedef struct {
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255 int map[256];
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256 void *data;
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257 int (*convert)(void *data, const char *s);
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258 void (*release)(void *data);
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259 } XML_Encoding;
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260
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261 /* This is called for an encoding that is unknown to the parser.
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262 The encodingHandlerData argument is that which was passed as the
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263 second argument to XML_SetUnknownEncodingHandler.
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264 The name argument gives the name of the encoding as specified in
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265 the encoding declaration.
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266 If the callback can provide information about the encoding,
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267 it must fill in the XML_Encoding structure, and return 1.
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268 Otherwise it must return 0.
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269 If info does not describe a suitable encoding,
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270 then the parser will return an XML_UNKNOWN_ENCODING error. */
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271
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272 typedef int (*XML_UnknownEncodingHandler)(void *encodingHandlerData,
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273 const XML_Char *name,
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274 XML_Encoding *info);
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275
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276 void XMLPARSEAPI
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277 XML_SetElementHandler(XML_Parser parser,
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278 XML_StartElementHandler start,
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279 XML_EndElementHandler end);
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280
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281 void XMLPARSEAPI
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282 XML_SetCharacterDataHandler(XML_Parser parser,
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283 XML_CharacterDataHandler handler);
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284
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285 void XMLPARSEAPI
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286 XML_SetProcessingInstructionHandler(XML_Parser parser,
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287 XML_ProcessingInstructionHandler handler);
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288 void XMLPARSEAPI
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289 XML_SetCommentHandler(XML_Parser parser,
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290 XML_CommentHandler handler);
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291
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292 void XMLPARSEAPI
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293 XML_SetCdataSectionHandler(XML_Parser parser,
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294 XML_StartCdataSectionHandler start,
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295 XML_EndCdataSectionHandler end);
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296
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297 /* This sets the default handler and also inhibits expansion of internal entities.
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298 The entity reference will be passed to the default handler. */
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299
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300 void XMLPARSEAPI
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301 XML_SetDefaultHandler(XML_Parser parser,
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302 XML_DefaultHandler handler);
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303
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304 /* This sets the default handler but does not inhibit expansion of internal entities.
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305 The entity reference will not be passed to the default handler. */
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306
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307 void XMLPARSEAPI
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308 XML_SetDefaultHandlerExpand(XML_Parser parser,
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309 XML_DefaultHandler handler);
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310
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311 void XMLPARSEAPI
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312 XML_SetUnparsedEntityDeclHandler(XML_Parser parser,
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313 XML_UnparsedEntityDeclHandler handler);
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314
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315 void XMLPARSEAPI
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316 XML_SetNotationDeclHandler(XML_Parser parser,
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317 XML_NotationDeclHandler handler);
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318
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319 void XMLPARSEAPI
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320 XML_SetNamespaceDeclHandler(XML_Parser parser,
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321 XML_StartNamespaceDeclHandler start,
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322 XML_EndNamespaceDeclHandler end);
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323
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324 void XMLPARSEAPI
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325 XML_SetNotStandaloneHandler(XML_Parser parser,
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326 XML_NotStandaloneHandler handler);
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327
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328 void XMLPARSEAPI
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329 XML_SetExternalEntityRefHandler(XML_Parser parser,
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330 XML_ExternalEntityRefHandler handler);
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331
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332 /* If a non-null value for arg is specified here, then it will be passed
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333 as the first argument to the external entity ref handler instead
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334 of the parser object. */
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335 void XMLPARSEAPI
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336 XML_SetExternalEntityRefHandlerArg(XML_Parser, void *arg);
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337
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338 void XMLPARSEAPI
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339 XML_SetUnknownEncodingHandler(XML_Parser parser,
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340 XML_UnknownEncodingHandler handler,
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341 void *encodingHandlerData);
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342
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343 /* This can be called within a handler for a start element, end element,
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344 processing instruction or character data. It causes the corresponding
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345 markup to be passed to the default handler. */
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346 void XMLPARSEAPI XML_DefaultCurrent(XML_Parser parser);
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347
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348 /* This value is passed as the userData argument to callbacks. */
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349 void XMLPARSEAPI
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350 XML_SetUserData(XML_Parser parser, void *userData);
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351
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352 /* Returns the last value set by XML_SetUserData or null. */
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353 #define XML_GetUserData(parser) (*(void **)(parser))
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354
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355 /* This is equivalent to supplying an encoding argument
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356 to XML_CreateParser. It must not be called after XML_Parse
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357 or XML_ParseBuffer. */
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358
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359 int XMLPARSEAPI
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360 XML_SetEncoding(XML_Parser parser, const XML_Char *encoding);
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361
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362 /* If this function is called, then the parser will be passed
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363 as the first argument to callbacks instead of userData.
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364 The userData will still be accessible using XML_GetUserData. */
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365
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366 void XMLPARSEAPI
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367 XML_UseParserAsHandlerArg(XML_Parser parser);
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368
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369 /* Sets the base to be used for resolving relative URIs in system identifiers in
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370 declarations. Resolving relative identifiers is left to the application:
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371 this value will be passed through as the base argument to the
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372 XML_ExternalEntityRefHandler, XML_NotationDeclHandler
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373 and XML_UnparsedEntityDeclHandler. The base argument will be copied.
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374 Returns zero if out of memory, non-zero otherwise. */
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375
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376 int XMLPARSEAPI
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377 XML_SetBase(XML_Parser parser, const XML_Char *base);
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378
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379 const XML_Char XMLPARSEAPI *
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380 XML_GetBase(XML_Parser parser);
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381
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382 /* Returns the number of the attributes passed in last call to the
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383 XML_StartElementHandler that were specified in the start-tag rather
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384 than defaulted. */
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385
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386 int XMLPARSEAPI XML_GetSpecifiedAttributeCount(XML_Parser parser);
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387
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388 /* Parses some input. Returns 0 if a fatal error is detected.
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389 The last call to XML_Parse must have isFinal true;
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390 len may be zero for this call (or any other). */
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391 int XMLPARSEAPI
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392 XML_Parse(XML_Parser parser, const char *s, int len, int isFinal);
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393
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394 void XMLPARSEAPI *
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395 XML_GetBuffer(XML_Parser parser, int len);
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396
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397 int XMLPARSEAPI
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398 XML_ParseBuffer(XML_Parser parser, int len, int isFinal);
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399
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400 /* Creates an XML_Parser object that can parse an external general entity;
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401 context is a '\0'-terminated string specifying the parse context;
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402 encoding is a '\0'-terminated string giving the name of the externally specified encoding,
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403 or null if there is no externally specified encoding.
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404 The context string consists of a sequence of tokens separated by formfeeds (\f);
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405 a token consisting of a name specifies that the general entity of the name
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406 is open; a token of the form prefix=uri specifies the namespace for a particular
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407 prefix; a token of the form =uri specifies the default namespace.
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408 This can be called at any point after the first call to an ExternalEntityRefHandler
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409 so longer as the parser has not yet been freed.
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410 The new parser is completely independent and may safely be used in a separate thread.
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411 The handlers and userData are initialized from the parser argument.
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412 Returns 0 if out of memory. Otherwise returns a new XML_Parser object. */
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413 XML_Parser XMLPARSEAPI
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414 XML_ExternalEntityParserCreate(XML_Parser parser,
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415 const XML_Char *context,
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416 const XML_Char *encoding);
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417
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418 enum XML_Error {
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419 XML_ERROR_NONE,
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420 XML_ERROR_NO_MEMORY,
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421 XML_ERROR_SYNTAX,
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422 XML_ERROR_NO_ELEMENTS,
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423 XML_ERROR_INVALID_TOKEN,
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424 XML_ERROR_UNCLOSED_TOKEN,
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425 XML_ERROR_PARTIAL_CHAR,
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426 XML_ERROR_TAG_MISMATCH,
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427 XML_ERROR_DUPLICATE_ATTRIBUTE,
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428 XML_ERROR_JUNK_AFTER_DOC_ELEMENT,
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429 XML_ERROR_PARAM_ENTITY_REF,
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430 XML_ERROR_UNDEFINED_ENTITY,
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431 XML_ERROR_RECURSIVE_ENTITY_REF,
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432 XML_ERROR_ASYNC_ENTITY,
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433 XML_ERROR_BAD_CHAR_REF,
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434 XML_ERROR_BINARY_ENTITY_REF,
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435 XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF,
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436 XML_ERROR_MISPLACED_XML_PI,
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437 XML_ERROR_UNKNOWN_ENCODING,
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438 XML_ERROR_INCORRECT_ENCODING,
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439 XML_ERROR_UNCLOSED_CDATA_SECTION,
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440 XML_ERROR_EXTERNAL_ENTITY_HANDLING,
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441 XML_ERROR_NOT_STANDALONE
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442 };
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443
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444 /* If XML_Parse or XML_ParseBuffer have returned 0, then XML_GetErrorCode
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445 returns information about the error. */
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446
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447 enum XML_Error XMLPARSEAPI XML_GetErrorCode(XML_Parser parser);
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448
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449 /* These functions return information about the current parse location.
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450 They may be called when XML_Parse or XML_ParseBuffer return 0;
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451 in this case the location is the location of the character at which
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452 the error was detected.
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453 They may also be called from any other callback called to report
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454 some parse event; in this the location is the location of the first
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455 of the sequence of characters that generated the event. */
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456
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457 int XMLPARSEAPI XML_GetCurrentLineNumber(XML_Parser parser);
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458 int XMLPARSEAPI XML_GetCurrentColumnNumber(XML_Parser parser);
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459 long XMLPARSEAPI XML_GetCurrentByteIndex(XML_Parser parser);
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460
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461 /* Return the number of bytes in the current event.
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462 Returns 0 if the event is in an internal entity. */
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463
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464 int XMLPARSEAPI XML_GetCurrentByteCount(XML_Parser parser);
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465
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466 /* For backwards compatibility with previous versions. */
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467 #define XML_GetErrorLineNumber XML_GetCurrentLineNumber
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468 #define XML_GetErrorColumnNumber XML_GetCurrentColumnNumber
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469 #define XML_GetErrorByteIndex XML_GetCurrentByteIndex
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470
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471 /* Frees memory used by the parser. */
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472 void XMLPARSEAPI
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473 XML_ParserFree(XML_Parser parser);
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474
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475 /* Returns a string describing the error. */
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476 const XML_LChar XMLPARSEAPI *XML_ErrorString(int code);
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477
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478 #ifdef __cplusplus
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479 }
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480 #endif
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481
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482 #endif /* not XmlParse_INCLUDED */
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