Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/gumbo-parser/src/vector.c @ 43:202a1f38a622

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FIX: New added code snippets did not yet account for the changed return values from "_fromto()"
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:15:08 +0200
parents b50eed0cc0ef
children
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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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17 #include "vector.h"
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19 #include <assert.h>
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20 #include <stdlib.h>
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21 #include <string.h>
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22 #include <strings.h>
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24 #include "util.h"
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26 struct GumboInternalParser;
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28 const GumboVector kGumboEmptyVector = {NULL, 0, 0};
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30 void gumbo_vector_init(struct GumboInternalParser* parser,
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31 size_t initial_capacity, GumboVector* vector) {
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32 vector->length = 0;
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33 vector->capacity = initial_capacity;
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34 if (initial_capacity > 0) {
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35 vector->data =
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36 gumbo_parser_allocate(parser, sizeof(void*) * initial_capacity);
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37 } else {
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38 vector->data = NULL;
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39 }
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40 }
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42 void gumbo_vector_destroy(
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43 struct GumboInternalParser* parser, GumboVector* vector) {
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44 if (vector->capacity > 0) {
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45 gumbo_parser_deallocate(parser, vector->data);
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46 }
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47 }
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49 static void enlarge_vector_if_full(
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50 struct GumboInternalParser* parser, GumboVector* vector) {
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51 if (vector->length >= vector->capacity) {
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52 if (vector->capacity) {
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53 size_t old_num_bytes = sizeof(void*) * vector->capacity;
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54 vector->capacity *= 2;
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55 size_t num_bytes = sizeof(void*) * vector->capacity;
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56 void** temp = gumbo_parser_allocate(parser, num_bytes);
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57 memcpy(temp, vector->data, old_num_bytes);
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58 gumbo_parser_deallocate(parser, vector->data);
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59 vector->data = temp;
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60 } else {
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61 // 0-capacity vector; no previous array to deallocate.
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62 vector->capacity = 2;
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63 vector->data =
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64 gumbo_parser_allocate(parser, sizeof(void*) * vector->capacity);
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65 }
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66 }
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67 }
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69 void gumbo_vector_add(
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70 struct GumboInternalParser* parser, void* element, GumboVector* vector) {
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71 enlarge_vector_if_full(parser, vector);
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72 assert(vector->data);
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73 assert(vector->length < vector->capacity);
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74 vector->data[vector->length++] = element;
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75 }
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76
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77 void* gumbo_vector_pop(
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78 struct GumboInternalParser* parser, GumboVector* vector) {
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79 if (vector->length == 0) {
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80 return NULL;
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81 }
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82 return vector->data[--vector->length];
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83 }
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84
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85 int gumbo_vector_index_of(GumboVector* vector, const void* element) {
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86 for (unsigned int i = 0; i < vector->length; ++i) {
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87 if (vector->data[i] == element) {
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88 return i;
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89 }
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90 }
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91 return -1;
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92 }
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93
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94 void gumbo_vector_insert_at(struct GumboInternalParser* parser, void* element,
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95 unsigned int index, GumboVector* vector) {
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96 assert(index >= 0);
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97 assert(index <= vector->length);
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98 enlarge_vector_if_full(parser, vector);
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99 ++vector->length;
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100 memmove(&vector->data[index + 1], &vector->data[index],
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101 sizeof(void*) * (vector->length - index - 1));
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102 vector->data[index] = element;
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103 }
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104
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105 void gumbo_vector_remove(
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106 struct GumboInternalParser* parser, void* node, GumboVector* vector) {
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107 int index = gumbo_vector_index_of(vector, node);
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108 if (index == -1) {
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109 return;
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110 }
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111 gumbo_vector_remove_at(parser, index, vector);
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112 }
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113
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114 void* gumbo_vector_remove_at(struct GumboInternalParser* parser,
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115 unsigned int index, GumboVector* vector) {
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116 assert(index >= 0);
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117 assert(index < vector->length);
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118 void* result = vector->data[index];
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119 memmove(&vector->data[index], &vector->data[index + 1],
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120 sizeof(void*) * (vector->length - index - 1));
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121 --vector->length;
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122 return result;
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123 }