Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/gumbo-parser/src/tokenizer.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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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 // This contains an implementation of a tokenizer for HTML5. It consumes a
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18 // buffer of UTF-8 characters, and then emits a stream of tokens.
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20 #ifndef GUMBO_TOKENIZER_H_
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21 #define GUMBO_TOKENIZER_H_
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23 #include <stdbool.h>
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24 #include <stddef.h>
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26 #include "gumbo.h"
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27 #include "token_type.h"
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28 #include "tokenizer_states.h"
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30 #ifdef __cplusplus
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31 extern "C" {
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32 #endif
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34 struct GumboInternalParser;
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36 // Struct containing all information pertaining to doctype tokens.
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37 typedef struct GumboInternalTokenDocType {
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38 const char* name;
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39 const char* public_identifier;
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40 const char* system_identifier;
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41 bool force_quirks;
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42 // There's no way to tell a 0-length public or system ID apart from the
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43 // absence of a public or system ID, but they're handled different by the
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44 // spec, so we need bool flags for them.
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45 bool has_public_identifier;
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46 bool has_system_identifier;
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47 } GumboTokenDocType;
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49 // Struct containing all information pertaining to start tag tokens.
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50 typedef struct GumboInternalTokenStartTag {
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51 GumboTag tag;
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52 GumboVector /* GumboAttribute */ attributes;
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53 bool is_self_closing;
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54 } GumboTokenStartTag;
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56 // A data structure representing a single token in the input stream. This
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57 // contains an enum for the type, the source position, a GumboStringPiece
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58 // pointing to the original text, and then a union for any parsed data.
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59 typedef struct GumboInternalToken {
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60 GumboTokenType type;
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61 GumboSourcePosition position;
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62 GumboStringPiece original_text;
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63 union {
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64 GumboTokenDocType doc_type;
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65 GumboTokenStartTag start_tag;
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66 GumboTag end_tag;
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67 const char* text; // For comments.
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68 int character; // For character, whitespace, null, and EOF tokens.
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69 } v;
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70 } GumboToken;
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71
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72 // Initializes the tokenizer state within the GumboParser object, setting up a
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73 // parse of the specified text.
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74 void gumbo_tokenizer_state_init(
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75 struct GumboInternalParser* parser, const char* text, size_t text_length);
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76
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77 // Destroys the tokenizer state within the GumboParser object, freeing any
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78 // dynamically-allocated structures within it.
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79 void gumbo_tokenizer_state_destroy(struct GumboInternalParser* parser);
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80
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81 // Sets the tokenizer state to the specified value. This is needed by some
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82 // parser states, which alter the state of the tokenizer in response to tags
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83 // seen.
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84 void gumbo_tokenizer_set_state(
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85 struct GumboInternalParser* parser, GumboTokenizerEnum state);
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86
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87 // Flags whether the current node is a foreign content element. This is
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88 // necessary for the markup declaration open state, where the tokenizer must be
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89 // aware of the state of the parser to properly tokenize bad comment tags.
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90 // http://www.whatwg.org/specs/web-apps/current-work/multipage/tokenization.html#markup-declaration-open-state
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91 void gumbo_tokenizer_set_is_current_node_foreign(
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92 struct GumboInternalParser* parser, bool is_foreign);
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93
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94 // Lexes a single token from the specified buffer, filling the output with the
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95 // parsed GumboToken data structure. Returns true for a successful
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96 // tokenization, false if a parse error occurs.
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97 //
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98 // Example:
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99 // struct GumboInternalParser parser;
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100 // GumboToken output;
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101 // gumbo_tokenizer_state_init(&parser, text, strlen(text));
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102 // while (gumbo_lex(&parser, &output)) {
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103 // ...do stuff with output.
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104 // gumbo_token_destroy(&parser, &token);
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105 // }
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106 // gumbo_tokenizer_state_destroy(&parser);
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107 bool gumbo_lex(struct GumboInternalParser* parser, GumboToken* output);
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108
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109 // Frees the internally-allocated pointers within an GumboToken. Note that this
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110 // doesn't free the token itself, since oftentimes it will be allocated on the
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111 // stack. A simple call to free() (or GumboParser->deallocator, if
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112 // appropriate) can handle that.
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113 //
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114 // Note that if you are handing over ownership of the internal strings to some
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115 // other data structure - for example, a parse tree - these do not need to be
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116 // freed.
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117 void gumbo_token_destroy(struct GumboInternalParser* parser, GumboToken* token);
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118
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119 #ifdef __cplusplus
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120 }
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121 #endif
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122
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123 #endif // GUMBO_TOKENIZER_H_