Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/gumbo-parser/src/error.h @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 // Copyright 2010 Google Inc. All Rights Reserved.
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2 //
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3 // Licensed under the Apache License, Version 2.0 (the "License");
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4 // you may not use this file except in compliance with the License.
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5 // You may obtain a copy of the License at
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6 //
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7 // http://www.apache.org/licenses/LICENSE-2.0
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8 //
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9 // Unless required by applicable law or agreed to in writing, software
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10 // distributed under the License is distributed on an "AS IS" BASIS,
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11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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12 // See the License for the specific language governing permissions and
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13 // limitations under the License.
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14 //
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15 // Author: jdtang@google.com (Jonathan Tang)
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16 //
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17 // Error types, enums, and handling functions.
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18
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19 #ifndef GUMBO_ERROR_H_
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20 #define GUMBO_ERROR_H_
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21 #ifdef _MSC_VER
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22 #ifndef _CRT_SECURE_NO_WARNINGS
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23 #define _CRT_SECURE_NO_WARNINGS
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24 #endif
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25 #endif
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26 #include <stdint.h>
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27
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28 #include "gumbo.h"
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29 #include "insertion_mode.h"
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30 #include "string_buffer.h"
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31 #include "token_type.h"
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32
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33 #ifdef __cplusplus
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34 extern "C" {
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35 #endif
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36
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37 struct GumboInternalParser;
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38
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39 typedef enum {
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40 GUMBO_ERR_UTF8_INVALID,
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41 GUMBO_ERR_UTF8_TRUNCATED,
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42 GUMBO_ERR_UTF8_NULL,
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43 GUMBO_ERR_NUMERIC_CHAR_REF_NO_DIGITS,
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44 GUMBO_ERR_NUMERIC_CHAR_REF_WITHOUT_SEMICOLON,
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45 GUMBO_ERR_NUMERIC_CHAR_REF_INVALID,
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46 GUMBO_ERR_NAMED_CHAR_REF_WITHOUT_SEMICOLON,
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47 GUMBO_ERR_NAMED_CHAR_REF_INVALID,
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48 GUMBO_ERR_TAG_STARTS_WITH_QUESTION,
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49 GUMBO_ERR_TAG_EOF,
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50 GUMBO_ERR_TAG_INVALID,
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51 GUMBO_ERR_CLOSE_TAG_EMPTY,
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52 GUMBO_ERR_CLOSE_TAG_EOF,
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53 GUMBO_ERR_CLOSE_TAG_INVALID,
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54 GUMBO_ERR_SCRIPT_EOF,
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55 GUMBO_ERR_ATTR_NAME_EOF,
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56 GUMBO_ERR_ATTR_NAME_INVALID,
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57 GUMBO_ERR_ATTR_DOUBLE_QUOTE_EOF,
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58 GUMBO_ERR_ATTR_SINGLE_QUOTE_EOF,
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59 GUMBO_ERR_ATTR_UNQUOTED_EOF,
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60 GUMBO_ERR_ATTR_UNQUOTED_RIGHT_BRACKET,
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61 GUMBO_ERR_ATTR_UNQUOTED_EQUALS,
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62 GUMBO_ERR_ATTR_AFTER_EOF,
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63 GUMBO_ERR_ATTR_AFTER_INVALID,
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64 GUMBO_ERR_DUPLICATE_ATTR,
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65 GUMBO_ERR_SOLIDUS_EOF,
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66 GUMBO_ERR_SOLIDUS_INVALID,
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67 GUMBO_ERR_DASHES_OR_DOCTYPE,
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68 GUMBO_ERR_COMMENT_EOF,
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69 GUMBO_ERR_COMMENT_INVALID,
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70 GUMBO_ERR_COMMENT_BANG_AFTER_DOUBLE_DASH,
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71 GUMBO_ERR_COMMENT_DASH_AFTER_DOUBLE_DASH,
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72 GUMBO_ERR_COMMENT_SPACE_AFTER_DOUBLE_DASH,
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73 GUMBO_ERR_COMMENT_END_BANG_EOF,
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74 GUMBO_ERR_DOCTYPE_EOF,
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75 GUMBO_ERR_DOCTYPE_INVALID,
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76 GUMBO_ERR_DOCTYPE_SPACE,
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77 GUMBO_ERR_DOCTYPE_RIGHT_BRACKET,
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78 GUMBO_ERR_DOCTYPE_SPACE_OR_RIGHT_BRACKET,
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79 GUMBO_ERR_DOCTYPE_END,
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80 GUMBO_ERR_PARSER,
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81 GUMBO_ERR_UNACKNOWLEDGED_SELF_CLOSING_TAG,
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82 } GumboErrorType;
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83
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84 // Additional data for duplicated attributes.
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85 typedef struct GumboInternalDuplicateAttrError {
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86 // The name of the attribute. Owned by this struct.
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87 const char* name;
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88
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89 // The (0-based) index within the attributes vector of the original
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90 // occurrence.
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91 unsigned int original_index;
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92
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93 // The (0-based) index where the new occurrence would be.
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94 unsigned int new_index;
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95 } GumboDuplicateAttrError;
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96
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97 // A simplified representation of the tokenizer state, designed to be more
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98 // useful to clients of this library than the internal representation. This
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99 // condenses the actual states used in the tokenizer state machine into a few
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100 // values that will be familiar to users of HTML.
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101 typedef enum {
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102 GUMBO_ERR_TOKENIZER_DATA,
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103 GUMBO_ERR_TOKENIZER_CHAR_REF,
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104 GUMBO_ERR_TOKENIZER_RCDATA,
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105 GUMBO_ERR_TOKENIZER_RAWTEXT,
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106 GUMBO_ERR_TOKENIZER_PLAINTEXT,
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107 GUMBO_ERR_TOKENIZER_SCRIPT,
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108 GUMBO_ERR_TOKENIZER_TAG,
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109 GUMBO_ERR_TOKENIZER_SELF_CLOSING_TAG,
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110 GUMBO_ERR_TOKENIZER_ATTR_NAME,
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111 GUMBO_ERR_TOKENIZER_ATTR_VALUE,
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112 GUMBO_ERR_TOKENIZER_MARKUP_DECLARATION,
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113 GUMBO_ERR_TOKENIZER_COMMENT,
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114 GUMBO_ERR_TOKENIZER_DOCTYPE,
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115 GUMBO_ERR_TOKENIZER_CDATA,
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116 } GumboTokenizerErrorState;
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117
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118 // Additional data for tokenizer errors.
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119 // This records the current state and codepoint encountered - this is usually
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120 // enough to reconstruct what went wrong and provide a friendly error message.
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121 typedef struct GumboInternalTokenizerError {
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122 // The bad codepoint encountered.
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123 int codepoint;
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124
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125 // The state that the tokenizer was in at the time.
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126 GumboTokenizerErrorState state;
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127 } GumboTokenizerError;
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128
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129 // Additional data for parse errors.
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130 typedef struct GumboInternalParserError {
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131 // The type of input token that resulted in this error.
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132 GumboTokenType input_type;
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133
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134 // The HTML tag of the input token. TAG_UNKNOWN if this was not a tag token.
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135 GumboTag input_tag;
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136
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137 // The insertion mode that the parser was in at the time.
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138 GumboInsertionMode parser_state;
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139
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140 // The tag stack at the point of the error. Note that this is an GumboVector
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141 // of GumboTag's *stored by value* - cast the void* to an GumboTag directly to
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142 // get at the tag.
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143 GumboVector /* GumboTag */ tag_stack;
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144 } GumboParserError;
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145
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146 // The overall error struct representing an error in decoding/tokenizing/parsing
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147 // the HTML. This contains an enumerated type flag, a source position, and then
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148 // a union of fields containing data specific to the error.
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149 typedef struct GumboInternalError {
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150 // The type of error.
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151 GumboErrorType type;
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152
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153 // The position within the source file where the error occurred.
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154 GumboSourcePosition position;
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155
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156 // A pointer to the byte within the original source file text where the error
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157 // occurred (note that this is not the same as position.offset, as that gives
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158 // character-based instead of byte-based offsets).
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159 const char* original_text;
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160
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161 // Type-specific error information.
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162 union {
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163 // The code point we encountered, for:
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164 // * GUMBO_ERR_UTF8_INVALID
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165 // * GUMBO_ERR_UTF8_TRUNCATED
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166 // * GUMBO_ERR_NUMERIC_CHAR_REF_WITHOUT_SEMICOLON
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167 // * GUMBO_ERR_NUMERIC_CHAR_REF_INVALID
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168 uint64_t codepoint;
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169
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170 // Tokenizer errors.
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171 GumboTokenizerError tokenizer;
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172
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173 // Short textual data, for:
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174 // * GUMBO_ERR_NAMED_CHAR_REF_WITHOUT_SEMICOLON
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175 // * GUMBO_ERR_NAMED_CHAR_REF_INVALID
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176 GumboStringPiece text;
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177
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178 // Duplicate attribute data, for GUMBO_ERR_DUPLICATE_ATTR.
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179 GumboDuplicateAttrError duplicate_attr;
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180
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181 // Parser state, for GUMBO_ERR_PARSER and
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182 // GUMBO_ERR_UNACKNOWLEDGE_SELF_CLOSING_TAG.
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183 struct GumboInternalParserError parser;
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184 } v;
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185 } GumboError;
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186
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187 // Adds a new error to the parser's error list, and returns a pointer to it so
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188 // that clients can fill out the rest of its fields. May return NULL if we're
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189 // already over the max_errors field specified in GumboOptions.
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190 GumboError* gumbo_add_error(struct GumboInternalParser* parser);
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191
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192 // Initializes the errors vector in the parser.
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193 void gumbo_init_errors(struct GumboInternalParser* errors);
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194
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195 // Frees all the errors in the 'errors_' field of the parser.
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196 void gumbo_destroy_errors(struct GumboInternalParser* errors);
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197
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198 // Frees the memory used for a single GumboError.
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199 void gumbo_error_destroy(struct GumboInternalParser* parser, GumboError* error);
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200
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201 // Prints an error to a string. This fills an empty GumboStringBuffer with a
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202 // freshly-allocated buffer containing the error message text. The caller is
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203 // responsible for deleting the buffer. (Note that the buffer is allocated with
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204 // the allocator specified in the GumboParser config and hence should be freed
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205 // by gumbo_parser_deallocate().)
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206 void gumbo_error_to_string(struct GumboInternalParser* parser,
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207 const GumboError* error, GumboStringBuffer* output);
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208
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209 // Prints a caret diagnostic to a string. This fills an empty GumboStringBuffer
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210 // with a freshly-allocated buffer containing the error message text. The
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211 // caller is responsible for deleting the buffer. (Note that the buffer is
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212 // allocated with the allocator specified in the GumboParser config and hence
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213 // should be freed by gumbo_parser_deallocate().)
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214 void gumbo_caret_diagnostic_to_string(struct GumboInternalParser* parser,
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215 const GumboError* error, const char* source_text,
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216 GumboStringBuffer* output);
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217
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218 // Like gumbo_caret_diagnostic_to_string, but prints the text to stdout instead
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219 // of writing to a string.
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220 void gumbo_print_caret_diagnostic(struct GumboInternalParser* parser,
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221 const GumboError* error, const char* source_text);
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222
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223 #ifdef __cplusplus
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224 }
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225 #endif
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226
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227 #endif // GUMBO_ERROR_H_