Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccutil/elst.cpp @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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1 /**********************************************************************
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2 * File: elst.cpp (Formerly elist.c)
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3 * Description: Embedded list handling code which is not in the include file.
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4 * Author: Phil Cheatle
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5 *
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6 * (C) Copyright 1991, Hewlett-Packard Ltd.
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7 ** Licensed under the Apache License, Version 2.0 (the "License");
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8 ** you may not use this file except in compliance with the License.
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9 ** You may obtain a copy of the License at
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10 ** http://www.apache.org/licenses/LICENSE-2.0
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11 ** Unless required by applicable law or agreed to in writing, software
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12 ** distributed under the License is distributed on an "AS IS" BASIS,
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13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 ** See the License for the specific language governing permissions and
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15 ** limitations under the License.
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16 *
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17 **********************************************************************/
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19 #include "elst.h"
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20 #include <cstdlib>
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22 namespace tesseract {
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24 /***********************************************************************
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25 * ELIST::internal_clear
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26 *
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27 * Used by the destructor and the "clear" member function of derived list
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28 * classes to destroy all the elements on the list.
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29 * The calling function passes a "zapper" function which can be called to
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30 * delete each element of the list, regardless of its derived type. This
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31 * technique permits a generic clear function to destroy elements of
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32 * different derived types correctly, without requiring virtual functions and
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33 * the consequential memory overhead.
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34 **********************************************************************/
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36 void ELIST::internal_clear( // destroy all links
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37 void (*zapper)(void *)) {
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38 // ptr to zapper functn
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39 ELIST_LINK *ptr;
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40 ELIST_LINK *next;
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42 if (!empty()) {
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43 ptr = last->next; // set to first
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44 last->next = nullptr; // break circle
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45 last = nullptr; // set list empty
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46 while (ptr) {
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47 next = ptr->next;
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48 zapper(ptr);
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49 ptr = next;
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50 }
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51 }
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52 }
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54 /***********************************************************************
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55 * ELIST::assign_to_sublist
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56 *
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57 * The list is set to a sublist of another list. "This" list must be empty
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58 * before this function is invoked. The two iterators passed must refer to
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59 * the same list, different from "this" one. The sublist removed is the
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60 * inclusive list from start_it's current position to end_it's current
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61 * position. If this range passes over the end of the source list then the
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62 * source list has its end set to the previous element of start_it. The
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63 * extracted sublist is unaffected by the end point of the source list, its
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64 * end point is always the end_it position.
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65 **********************************************************************/
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67 void ELIST::assign_to_sublist( // to this list
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68 ELIST_ITERATOR *start_it, // from list start
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69 ELIST_ITERATOR *end_it) { // from list end
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70 constexpr ERRCODE LIST_NOT_EMPTY("Destination list must be empty before extracting a sublist");
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72 if (!empty()) {
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73 LIST_NOT_EMPTY.error("ELIST.assign_to_sublist", ABORT);
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74 }
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76 last = start_it->extract_sublist(end_it);
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77 }
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79 /***********************************************************************
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80 * ELIST::sort
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81 *
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82 * Sort elements on list
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83 * NB If you don't like the const declarations in the comparator, coerce yours:
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84 * ( int (*)(const void *, const void *)
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85 **********************************************************************/
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87 void ELIST::sort( // sort elements
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88 int comparator( // comparison routine
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89 const void *, const void *)) {
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90 // Allocate an array of pointers, one per list element.
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91 auto count = length();
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93 if (count > 0) {
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94 // ptr array to sort
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95 std::vector<ELIST_LINK *> base;
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96 base.reserve(count);
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98 ELIST_ITERATOR it(this);
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100 // Extract all elements, putting the pointers in the array.
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101 for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
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102 base.push_back(it.extract());
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103 }
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104
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parents:
diff changeset
105 // Sort the pointer array.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 qsort(&base[0], count, sizeof(base[0]), comparator);
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107
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108 // Rebuild the list from the sorted pointers.
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diff changeset
109 for (auto current : base) {
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diff changeset
110 it.add_to_end(current);
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111 }
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112 }
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113 }
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114
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115 // Assuming list has been sorted already, insert new_link to
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116 // keep the list sorted according to the same comparison function.
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117 // Comparison function is the same as used by sort, i.e. uses double
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118 // indirection. Time is O(1) to add to beginning or end.
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119 // Time is linear to add pre-sorted items to an empty list.
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120 // If unique is set to true and comparator() returns 0 (an entry with the
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121 // same information as the one contained in new_link is already in the
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122 // list) - new_link is not added to the list and the function returns the
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123 // pointer to the identical entry that already exists in the list
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124 // (otherwise the function returns new_link).
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125 ELIST_LINK *ELIST::add_sorted_and_find(int comparator(const void *, const void *), bool unique,
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126 ELIST_LINK *new_link) {
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127 // Check for adding at the end.
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128 if (last == nullptr || comparator(&last, &new_link) < 0) {
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129 if (last == nullptr) {
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130 new_link->next = new_link;
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131 } else {
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132 new_link->next = last->next;
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133 last->next = new_link;
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134 }
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135 last = new_link;
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parents:
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136 } else {
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137 // Need to use an iterator.
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138 ELIST_ITERATOR it(this);
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139 for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
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140 ELIST_LINK *link = it.data();
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parents:
diff changeset
141 int compare = comparator(&link, &new_link);
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parents:
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142 if (compare > 0) {
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143 break;
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parents:
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144 } else if (unique && compare == 0) {
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parents:
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145 return link;
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parents:
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146 }
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parents:
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147 }
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parents:
diff changeset
148 if (it.cycled_list()) {
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parents:
diff changeset
149 it.add_to_end(new_link);
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parents:
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150 } else {
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parents:
diff changeset
151 it.add_before_then_move(new_link);
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152 }
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153 }
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parents:
diff changeset
154 return new_link;
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155 }
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156
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diff changeset
157 /***********************************************************************
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158 * MEMBER FUNCTIONS OF CLASS: ELIST_ITERATOR
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159 * =========================================
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diff changeset
160 **********************************************************************/
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diff changeset
161
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parents:
diff changeset
162 /***********************************************************************
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diff changeset
163 * ELIST_ITERATOR::forward
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diff changeset
164 *
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parents:
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165 * Move the iterator to the next element of the list.
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parents:
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166 * REMEMBER: ALL LISTS ARE CIRCULAR.
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parents:
diff changeset
167 **********************************************************************/
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168
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parents:
diff changeset
169 ELIST_LINK *ELIST_ITERATOR::forward() {
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diff changeset
170 #ifndef NDEBUG
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171 if (!list)
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diff changeset
172 NO_LIST.error("ELIST_ITERATOR::forward", ABORT);
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parents:
diff changeset
173 #endif
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parents:
diff changeset
174 if (list->empty()) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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175 return nullptr;
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parents:
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176 }
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177
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diff changeset
178 if (current) { // not removed so
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179 // set previous
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180 prev = current;
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diff changeset
181 started_cycling = true;
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parents:
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182 // In case next is deleted by another iterator, get next from current.
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parents:
diff changeset
183 current = current->next;
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parents:
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184 } else {
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parents:
diff changeset
185 if (ex_current_was_cycle_pt) {
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parents:
diff changeset
186 cycle_pt = next;
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187 }
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diff changeset
188 current = next;
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parents:
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189 }
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parents:
diff changeset
190 #ifndef NDEBUG
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parents:
diff changeset
191 if (!current)
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diff changeset
192 NULL_DATA.error("ELIST_ITERATOR::forward", ABORT);
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parents:
diff changeset
193 #endif
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parents:
diff changeset
194 next = current->next;
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195
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parents:
diff changeset
196 #ifndef NDEBUG
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parents:
diff changeset
197 if (!next) {
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diff changeset
198 NULL_NEXT.error("ELIST_ITERATOR::forward", ABORT,
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parents:
diff changeset
199 "This is: %p Current is: %p",
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diff changeset
200 static_cast<void *>(this),
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diff changeset
201 static_cast<void *>(current));
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parents:
diff changeset
202 }
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203 #endif
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204 return current;
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205 }
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206
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207 /***********************************************************************
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208 * ELIST_ITERATOR::data_relative
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209 *
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210 * Return the data pointer to the element "offset" elements from current.
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211 * "offset" must not be less than -1.
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212 * (This function can't be INLINEd because it contains a loop)
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213 **********************************************************************/
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214
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215 ELIST_LINK *ELIST_ITERATOR::data_relative( // get data + or - ...
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216 int8_t offset) { // offset from current
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217 ELIST_LINK *ptr;
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218
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219 #ifndef NDEBUG
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220 if (!list)
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221 NO_LIST.error("ELIST_ITERATOR::data_relative", ABORT);
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222 if (list->empty())
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223 EMPTY_LIST.error("ELIST_ITERATOR::data_relative", ABORT);
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224 if (offset < -1)
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225 BAD_PARAMETER.error("ELIST_ITERATOR::data_relative", ABORT, "offset < -l");
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226 #endif
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227
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228 if (offset == -1) {
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229 ptr = prev;
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230 } else {
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231 for (ptr = current ? current : prev; offset-- > 0; ptr = ptr->next) {
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232 ;
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233 }
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234 }
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235
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236 #ifndef NDEBUG
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237 if (!ptr)
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238 NULL_DATA.error("ELIST_ITERATOR::data_relative", ABORT);
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239 #endif
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240
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241 return ptr;
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242 }
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243
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244 /***********************************************************************
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245 * ELIST_ITERATOR::move_to_last()
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246 *
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247 * Move current so that it is set to the end of the list.
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248 * Return data just in case anyone wants it.
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249 * (This function can't be INLINEd because it contains a loop)
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250 **********************************************************************/
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251
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252 ELIST_LINK *ELIST_ITERATOR::move_to_last() {
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253 #ifndef NDEBUG
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254 if (!list)
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255 NO_LIST.error("ELIST_ITERATOR::move_to_last", ABORT);
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256 #endif
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257
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258 while (current != list->last) {
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259 forward();
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260 }
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261
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262 return current;
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263 }
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264
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265 /***********************************************************************
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266 * ELIST_ITERATOR::exchange()
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267 *
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268 * Given another iterator, whose current element is a different element on
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269 * the same list list OR an element of another list, exchange the two current
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270 * elements. On return, each iterator points to the element which was the
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271 * other iterators current on entry.
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272 * (This function hasn't been in-lined because its a bit big!)
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273 **********************************************************************/
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274
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275 void ELIST_ITERATOR::exchange( // positions of 2 links
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276 ELIST_ITERATOR *other_it) { // other iterator
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277 constexpr ERRCODE DONT_EXCHANGE_DELETED("Can't exchange deleted elements of lists");
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278
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279 ELIST_LINK *old_current;
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280
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281 #ifndef NDEBUG
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282 if (!list)
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283 NO_LIST.error("ELIST_ITERATOR::exchange", ABORT);
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284 if (!other_it)
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285 BAD_PARAMETER.error("ELIST_ITERATOR::exchange", ABORT, "other_it nullptr");
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286 if (!(other_it->list))
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287 NO_LIST.error("ELIST_ITERATOR::exchange", ABORT, "other_it");
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288 #endif
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289
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290 /* Do nothing if either list is empty or if both iterators reference the same
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291 link */
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292
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293 if ((list->empty()) || (other_it->list->empty()) || (current == other_it->current)) {
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294 return;
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295 }
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296
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297 /* Error if either current element is deleted */
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298
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299 if (!current || !other_it->current) {
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300 DONT_EXCHANGE_DELETED.error("ELIST_ITERATOR.exchange", ABORT);
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301 }
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302
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303 /* Now handle the 4 cases: doubleton list; non-doubleton adjacent elements
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304 (other before this); non-doubleton adjacent elements (this before other);
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diff changeset
305 non-adjacent elements. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
306
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
307 // adjacent links
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
308 if ((next == other_it->current) || (other_it->next == current)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
309 // doubleton list
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
310 if ((next == other_it->current) && (other_it->next == current)) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
311 prev = next = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
312 other_it->prev = other_it->next = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
313 } else { // non-doubleton with
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
314 // adjacent links
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
315 // other before this
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
316 if (other_it->next == current) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
317 other_it->prev->next = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
318 other_it->current->next = next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
319 current->next = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
320 other_it->next = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
321 prev = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
322 } else { // this before other
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
323 prev->next = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
324 current->next = other_it->next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
325 other_it->current->next = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
326 next = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
327 other_it->prev = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
328 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
329 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
330 } else { // no overlap
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
331 prev->next = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
332 current->next = other_it->next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
333 other_it->prev->next = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
334 other_it->current->next = next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
335 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
336
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
337 /* update end of list pointer when necessary (remember that the 2 iterators
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
338 may iterate over different lists!) */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
339
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
340 if (list->last == current) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
341 list->last = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
342 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
343 if (other_it->list->last == other_it->current) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
344 other_it->list->last = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
345 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
346
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
347 if (current == cycle_pt) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
348 cycle_pt = other_it->cycle_pt;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
349 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
350 if (other_it->current == other_it->cycle_pt) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
351 other_it->cycle_pt = cycle_pt;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
352 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
353
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
354 /* The actual exchange - in all cases*/
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
355
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
356 old_current = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
357 current = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
358 other_it->current = old_current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
359 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
360
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
361 /***********************************************************************
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
362 * ELIST_ITERATOR::extract_sublist()
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
363 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
364 * This is a private member, used only by ELIST::assign_to_sublist.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
365 * Given another iterator for the same list, extract the links from THIS to
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
366 * OTHER inclusive, link them into a new circular list, and return a
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
367 * pointer to the last element.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
368 * (Can't inline this function because it contains a loop)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
369 **********************************************************************/
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
370
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
371 ELIST_LINK *ELIST_ITERATOR::extract_sublist( // from this current
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
372 ELIST_ITERATOR *other_it) { // to other current
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
373 #ifndef NDEBUG
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
374 constexpr ERRCODE BAD_EXTRACTION_PTS("Can't extract sublist from points on different lists");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
375 constexpr ERRCODE DONT_EXTRACT_DELETED("Can't extract a sublist marked by deleted points");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
376 #endif
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
377 constexpr ERRCODE BAD_SUBLIST("Can't find sublist end point in original list");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
378
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
379 ELIST_ITERATOR temp_it = *this;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
380 ELIST_LINK *end_of_new_list;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
381
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
382 #ifndef NDEBUG
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
383 if (!other_it)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
384 BAD_PARAMETER.error("ELIST_ITERATOR::extract_sublist", ABORT, "other_it nullptr");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
385 if (!list)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
386 NO_LIST.error("ELIST_ITERATOR::extract_sublist", ABORT);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
387 if (list != other_it->list)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
388 BAD_EXTRACTION_PTS.error("ELIST_ITERATOR.extract_sublist", ABORT);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
389 if (list->empty())
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
390 EMPTY_LIST.error("ELIST_ITERATOR::extract_sublist", ABORT);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
391
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
392 if (!current || !other_it->current)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
393 DONT_EXTRACT_DELETED.error("ELIST_ITERATOR.extract_sublist", ABORT);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
394 #endif
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
395
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
396 ex_current_was_last = other_it->ex_current_was_last = false;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
397 ex_current_was_cycle_pt = false;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
398 other_it->ex_current_was_cycle_pt = false;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
399
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
400 temp_it.mark_cycle_pt();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
401 do { // walk sublist
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
402 if (temp_it.cycled_list()) { // can't find end pt
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
403 BAD_SUBLIST.error("ELIST_ITERATOR.extract_sublist", ABORT);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
404 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
405
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
406 if (temp_it.at_last()) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
407 list->last = prev;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
408 ex_current_was_last = other_it->ex_current_was_last = true;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
409 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
410
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
411 if (temp_it.current == cycle_pt) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
412 ex_current_was_cycle_pt = true;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
413 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
414
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
415 if (temp_it.current == other_it->cycle_pt) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
416 other_it->ex_current_was_cycle_pt = true;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
417 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
418
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
419 temp_it.forward();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
420 } while (temp_it.prev != other_it->current);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
421
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
422 // circularise sublist
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
423 other_it->current->next = current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
424 end_of_new_list = other_it->current;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
425
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
426 // sublist = whole list
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
427 if (prev == other_it->current) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
428 list->last = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
429 prev = current = next = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
430 other_it->prev = other_it->current = other_it->next = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
431 } else {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
432 prev->next = other_it->next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
433 current = other_it->current = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
434 next = other_it->next;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
435 other_it->prev = prev;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
436 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
437 return end_of_new_list;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
438 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
439
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
440 } // namespace tesseract