Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/leptonica/src/map.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 /*====================================================================*
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2 - Copyright (C) 2001 Leptonica. All rights reserved.
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3 -
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4 - Redistribution and use in source and binary forms, with or without
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5 - modification, are permitted provided that the following conditions
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6 - are met:
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7 - 1. Redistributions of source code must retain the above copyright
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8 - notice, this list of conditions and the following disclaimer.
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9 - 2. Redistributions in binary form must reproduce the above
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10 - copyright notice, this list of conditions and the following
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11 - disclaimer in the documentation and/or other materials
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12 - provided with the distribution.
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13 -
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14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 *====================================================================*/
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26
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27 /*!
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28 * \file map.c
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29 * <pre>
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30 *
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31 * This is an interface for map and set functions, based on using
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32 * red-black binary search trees. Because these trees are sorted,
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33 * they are O(nlogn) to build. They allow logn insertion, find
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34 * and deletion of elements.
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35 *
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36 * Both the map and set are ordered by key value, with unique keys.
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37 * For the map, the elements are key/value pairs.
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38 * For the set we only store unique, ordered keys, and the value
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39 * (set to 0 in the implementation) is ignored.
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40 *
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41 * The keys for the map and set can be any of the three types in the
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42 * l_rbtree_keytype enum. The values stored can be any of the four
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43 * types in the rb_type union.
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44 *
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45 * In-order forward and reverse iterators are provided for maps and sets.
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46 * To forward iterate over the map for any type of key (in this example,
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47 * uint32), extracting integer values:
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48 *
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49 * L_AMAP *m = l_amapCreate(L_UINT_TYPE);
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50 * [add elements to the map ...]
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51 * L_AMAP_NODE *n = l_amapGetFirst(m);
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52 * while (n) {
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53 * l_int32 val = n->value.itype;
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54 * // do something ...
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55 * n = l_amapGetNext(n);
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56 * }
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57 *
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58 * If the nodes are deleted during the iteration:
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59 *
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60 * L_AMAP *m = l_amapCreate(L_UINT_TYPE);
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61 * [add elements to the map ...]
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62 * L_AMAP_NODE *n = l_amapGetFirst(m);
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63 * L_AMAP_NODE *nn;
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64 * while (n) {
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65 * nn = l_amapGetNext(n);
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66 * l_int32 val = n->value.itype;
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67 * l_uint32 key = n->key.utype;
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68 * // do something ...
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69 * l_amapDelete(m, n->key);
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70 * n = nn;
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71 * }
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72 *
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73 * See prog/maptest.c and prog/settest.c for more examples of usage.
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74 *
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75 * Interface to (a) map using a general key and storing general values
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76 * L_AMAP *l_amapCreate()
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77 * RB_TYPE *l_amapFind()
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78 * void l_amapInsert()
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79 * void l_amapDelete()
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80 * void l_amapDestroy()
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81 * L_AMAP_NODE *l_amapGetFirst()
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82 * L_AMAP_NODE *l_amapGetNext()
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83 * L_AMAP_NODE *l_amapGetLast()
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84 * L_AMAP_NODE *l_amapGetPrev()
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85 * l_int32 l_amapSize()
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86 *
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87 * Interface to (a) set using a general key
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88 * L_ASET *l_asetCreate()
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89 * RB_TYPE *l_asetFind()
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90 * void l_asetInsert()
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91 * void l_asetDelete()
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92 * void l_asetDestroy()
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93 * L_ASET_NODE *l_asetGetFirst()
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94 * L_ASET_NODE *l_asetGetNext()
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95 * L_ASET_NODE *l_asetGetLast()
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96 * L_ASET_NODE *l_asetGetPrev()
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97 * l_int32 l_asetSize()
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diff changeset
98 * </pre>
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diff changeset
99 */
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100
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diff changeset
101 #ifdef HAVE_CONFIG_H
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102 #include <config_auto.h>
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diff changeset
103 #endif /* HAVE_CONFIG_H */
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104
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105 #include "allheaders.h"
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106
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107 /* ------------------------------------------------------------- *
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108 * Interface to Map *
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109 * ------------------------------------------------------------- */
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110 L_AMAP *
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111 l_amapCreate(l_int32 keytype)
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112 {
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diff changeset
113 L_AMAP *m;
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114
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diff changeset
115 if (keytype != L_INT_TYPE && keytype != L_UINT_TYPE &&
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116 keytype != L_FLOAT_TYPE)
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117 return (L_AMAP *)ERROR_PTR("invalid keytype", __func__, NULL);
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118
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119 m = (L_AMAP *)LEPT_CALLOC(1, sizeof(L_AMAP));
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120 m->keytype = keytype;
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121 return m;
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122 }
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123
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124 RB_TYPE *
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125 l_amapFind(L_AMAP *m,
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126 RB_TYPE key)
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127 {
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128 return l_rbtreeLookup(m, key);
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129 }
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130
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131 void
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132 l_amapInsert(L_AMAP *m,
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133 RB_TYPE key,
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diff changeset
134 RB_TYPE value)
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135 {
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136 l_rbtreeInsert(m, key, value);
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137 }
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138
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139 void
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diff changeset
140 l_amapDelete(L_AMAP *m,
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diff changeset
141 RB_TYPE key)
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142 {
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143 l_rbtreeDelete(m, key);
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144 }
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145
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146 void
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diff changeset
147 l_amapDestroy(L_AMAP **pm)
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148 {
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diff changeset
149 l_rbtreeDestroy(pm);
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150 }
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diff changeset
151
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diff changeset
152 L_AMAP_NODE *
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153 l_amapGetFirst(L_AMAP *m)
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diff changeset
154 {
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diff changeset
155 return l_rbtreeGetFirst(m);
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156 }
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diff changeset
157
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diff changeset
158 L_AMAP_NODE *
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diff changeset
159 l_amapGetNext(L_AMAP_NODE *n)
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diff changeset
160 {
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diff changeset
161 return l_rbtreeGetNext(n);
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162 }
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diff changeset
163
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diff changeset
164 L_AMAP_NODE *
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diff changeset
165 l_amapGetLast(L_AMAP *m)
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diff changeset
166 {
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parents:
diff changeset
167 return l_rbtreeGetLast(m);
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diff changeset
168 }
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diff changeset
169
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diff changeset
170 L_AMAP_NODE *
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diff changeset
171 l_amapGetPrev(L_AMAP_NODE *n)
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diff changeset
172 {
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diff changeset
173 return l_rbtreeGetPrev(n);
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diff changeset
174 }
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diff changeset
175
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diff changeset
176 l_int32
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diff changeset
177 l_amapSize(L_AMAP *m)
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diff changeset
178 {
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diff changeset
179 return l_rbtreeGetCount(m);
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diff changeset
180 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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diff changeset
181
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diff changeset
182
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parents:
diff changeset
183 /* ------------------------------------------------------------- *
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parents:
diff changeset
184 * Interface to Set *
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parents:
diff changeset
185 * ------------------------------------------------------------- */
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
186 L_ASET *
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parents:
diff changeset
187 l_asetCreate(l_int32 keytype)
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parents:
diff changeset
188 {
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
189 L_ASET *s;
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parents:
diff changeset
190
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parents:
diff changeset
191 if (keytype != L_INT_TYPE && keytype != L_UINT_TYPE &&
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 keytype != L_FLOAT_TYPE)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
193 return (L_ASET *)ERROR_PTR("invalid keytype", __func__, NULL);
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parents:
diff changeset
194
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parents:
diff changeset
195 s = (L_ASET *)LEPT_CALLOC(1, sizeof(L_ASET));
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
196 s->keytype = keytype;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
197 return s;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
198 }
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
199
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
200 /*
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
201 * l_asetFind()
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
202 *
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203 * This returns NULL if not found, non-null if it is. In the latter
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204 * case, the value stored in the returned pointer has no significance.
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205 */
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206 RB_TYPE *
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207 l_asetFind(L_ASET *s,
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208 RB_TYPE key)
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209 {
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210 return l_rbtreeLookup(s, key);
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211 }
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212
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213 void
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214 l_asetInsert(L_ASET *s,
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215 RB_TYPE key)
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parents:
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216 {
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217 RB_TYPE value;
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218
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219 value.itype = 0; /* meaningless */
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220 l_rbtreeInsert(s, key, value);
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221 }
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222
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223 void
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224 l_asetDelete(L_ASET *s,
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225 RB_TYPE key)
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parents:
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226 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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227 l_rbtreeDelete(s, key);
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228 }
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229
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230 void
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231 l_asetDestroy(L_ASET **ps)
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232 {
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parents:
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233 l_rbtreeDestroy(ps);
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234 }
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235
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parents:
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236 L_ASET_NODE *
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237 l_asetGetFirst(L_ASET *s)
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diff changeset
238 {
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parents:
diff changeset
239 return l_rbtreeGetFirst(s);
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240 }
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parents:
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241
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parents:
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242 L_ASET_NODE *
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parents:
diff changeset
243 l_asetGetNext(L_ASET_NODE *n)
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diff changeset
244 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
245 return l_rbtreeGetNext(n);
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parents:
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246 }
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
247
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parents:
diff changeset
248 L_ASET_NODE *
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parents:
diff changeset
249 l_asetGetLast(L_ASET *s)
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parents:
diff changeset
250 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
251 return l_rbtreeGetLast(s);
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parents:
diff changeset
252 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
253
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
254 L_ASET_NODE *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 l_asetGetPrev(L_ASET_NODE *n)
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parents:
diff changeset
256 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
257 return l_rbtreeGetPrev(n);
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parents:
diff changeset
258 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
259
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
260 l_int32
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
261 l_asetSize(L_ASET *s)
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parents:
diff changeset
262 {
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
263 return l_rbtreeGetCount(s);
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
264 }