Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-bimap.hh @ 22:d77477b4e151

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Let _int_rc() also handle (i.e. ignore) a local version suffix
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 12:05:57 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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1 /*
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2 * Copyright © 2019 Adobe Inc.
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3 *
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4 * This is part of HarfBuzz, a text shaping library.
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5 *
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6 * Permission is hereby granted, without written agreement and without
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7 * license or royalty fees, to use, copy, modify, and distribute this
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8 * software and its documentation for any purpose, provided that the
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9 * above copyright notice and the following two paragraphs appear in
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10 * all copies of this software.
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11 *
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12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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16 * DAMAGE.
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17 *
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18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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23 *
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24 * Adobe Author(s): Michiharu Ariza
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25 */
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27 #ifndef HB_BIMAP_HH
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28 #define HB_BIMAP_HH
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30 #include "hb.hh"
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31 #include "hb-map.hh"
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33 /* Bi-directional map */
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34 struct hb_bimap_t
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35 {
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36 void reset ()
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37 {
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38 forw_map.reset ();
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39 back_map.reset ();
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40 }
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42 void resize (unsigned pop)
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43 {
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44 forw_map.resize (pop);
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45 back_map.resize (pop);
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46 }
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48 bool in_error () const { return forw_map.in_error () || back_map.in_error (); }
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49
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50 void set (hb_codepoint_t lhs, hb_codepoint_t rhs)
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51 {
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52 if (in_error ()) return;
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53 if (unlikely (lhs == HB_MAP_VALUE_INVALID)) return;
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54 if (unlikely (rhs == HB_MAP_VALUE_INVALID)) { del (lhs); return; }
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56 forw_map.set (lhs, rhs);
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57 if (unlikely (in_error ())) return;
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59 back_map.set (rhs, lhs);
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60 if (unlikely (in_error ())) forw_map.del (lhs);
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61 }
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62
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63 hb_codepoint_t get (hb_codepoint_t lhs) const { return forw_map.get (lhs); }
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64 hb_codepoint_t backward (hb_codepoint_t rhs) const { return back_map.get (rhs); }
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66 hb_codepoint_t operator [] (hb_codepoint_t lhs) const { return get (lhs); }
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67 bool has (hb_codepoint_t lhs) const { return forw_map.has (lhs); }
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70 void del (hb_codepoint_t lhs)
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71 {
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72 back_map.del (get (lhs));
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73 forw_map.del (lhs);
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74 }
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76 void clear ()
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77 {
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78 forw_map.clear ();
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79 back_map.clear ();
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80 }
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81
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82 bool is_empty () const { return forw_map.is_empty (); }
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84 unsigned int get_population () const { return forw_map.get_population (); }
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86 protected:
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87 hb_map_t forw_map;
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88 hb_map_t back_map;
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89 };
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91 /* Inremental bimap: only lhs is given, rhs is incrementally assigned */
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92 struct hb_inc_bimap_t : hb_bimap_t
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93 {
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94 /* Add a mapping from lhs to rhs with a unique value if lhs is unknown.
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95 * Return the rhs value as the result.
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96 */
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97 hb_codepoint_t add (hb_codepoint_t lhs)
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98 {
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99 hb_codepoint_t rhs = forw_map[lhs];
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100 if (rhs == HB_MAP_VALUE_INVALID)
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101 {
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102 rhs = next_value++;
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103 set (lhs, rhs);
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104 }
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105 return rhs;
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106 }
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107
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108 hb_codepoint_t skip ()
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109 { return next_value++; }
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110
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111 hb_codepoint_t get_next_value () const
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112 { return next_value; }
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113
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114 void add_set (const hb_set_t *set)
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115 {
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116 hb_codepoint_t i = HB_SET_VALUE_INVALID;
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117 while (hb_set_next (set, &i)) add (i);
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118 }
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119
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120 /* Create an identity map. */
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121 bool identity (unsigned int size)
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122 {
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123 clear ();
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124 for (hb_codepoint_t i = 0; i < size; i++) set (i, i);
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125 return !in_error ();
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126 }
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127
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128 protected:
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129 static int cmp_id (const void* a, const void* b)
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130 { return (int)*(const hb_codepoint_t *)a - (int)*(const hb_codepoint_t *)b; }
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131
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132 public:
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133 /* Optional: after finished adding all mappings in a random order,
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134 * reassign rhs to lhs so that they are in the same order. */
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135 void sort ()
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136 {
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137 hb_codepoint_t count = get_population ();
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138 hb_vector_t <hb_codepoint_t> work;
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139 work.resize (count);
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140
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141 for (hb_codepoint_t rhs = 0; rhs < count; rhs++)
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142 work[rhs] = back_map[rhs];
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143
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144 work.qsort (cmp_id);
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145
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146 clear ();
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147 for (hb_codepoint_t rhs = 0; rhs < count; rhs++)
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148 set (work[rhs], rhs);
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149 }
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150
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151 protected:
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152 unsigned int next_value = 0;
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153 };
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154
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155 #endif /* HB_BIMAP_HH */