annotate mupdf-source/thirdparty/harfbuzz/src/hb-ot-shaper-indic-machine.rl @ 32:72c1b70d4f5c

Also apply -Werror=implicit-function-declaration
author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 15:10:12 +0200
parents b50eed0cc0ef
children
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2
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1 /*
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2 * Copyright © 2011,2012 Google, 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 * Google Author(s): Behdad Esfahbod
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25 */
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26
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27 #ifndef HB_OT_SHAPER_INDIC_MACHINE_HH
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28 #define HB_OT_SHAPER_INDIC_MACHINE_HH
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29
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30 #include "hb.hh"
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31
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32 #include "hb-ot-layout.hh"
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33 #include "hb-ot-shaper-indic.hh"
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34
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35 /* buffer var allocations */
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36 #define indic_category() ot_shaper_var_u8_category() /* indic_category_t */
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37 #define indic_position() ot_shaper_var_u8_auxiliary() /* indic_position_t */
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38
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39 using indic_category_t = unsigned;
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40 using indic_position_t = ot_position_t;
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41
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42 #define I_Cat(Cat) indic_syllable_machine_ex_##Cat
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43
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44 enum indic_syllable_type_t {
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45 indic_consonant_syllable,
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46 indic_vowel_syllable,
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47 indic_standalone_cluster,
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48 indic_symbol_cluster,
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49 indic_broken_cluster,
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50 indic_non_indic_cluster,
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51 };
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52
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53 %%{
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54 machine indic_syllable_machine;
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55 alphtype unsigned char;
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56 write exports;
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57 write data;
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58 }%%
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59
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60 %%{
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61
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62
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63 export X = 0;
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64 export C = 1;
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65 export V = 2;
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66 export N = 3;
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67 export H = 4;
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68 export ZWNJ = 5;
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69 export ZWJ = 6;
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70 export M = 7;
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71 export SM = 8;
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72 export A = 9;
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73 export VD = 9;
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74 export PLACEHOLDER = 10;
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75 export DOTTEDCIRCLE = 11;
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76 export RS = 12;
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77 export MPst = 13;
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78 export Repha = 14;
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79 export Ra = 15;
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80 export CM = 16;
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81 export Symbol= 17;
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82 export CS = 18;
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83
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84
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85 c = (C | Ra); # is_consonant
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86 n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
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87 z = ZWJ|ZWNJ; # is_joiner
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88 reph = (Ra H | Repha); # possible reph
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89
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90 cn = c.ZWJ?.n?;
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91 symbol = Symbol.N?;
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92 matra_group = z*.(M | SM? MPst).N?.H?;
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93 syllable_tail = (z?.SM.SM?.ZWNJ?)? (A | VD)*;
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94 halant_group = (z?.H.(ZWJ.N?)?);
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95 final_halant_group = halant_group | H.ZWNJ;
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96 medial_group = CM?;
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97 halant_or_matra_group = (final_halant_group | matra_group*);
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98
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99 complex_syllable_tail = (halant_group.cn)* medial_group halant_or_matra_group syllable_tail;
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100
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101 consonant_syllable = (Repha|CS)? cn complex_syllable_tail;
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102 vowel_syllable = reph? V.n? (ZWJ | complex_syllable_tail);
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103 standalone_cluster = ((Repha|CS)? PLACEHOLDER | reph? DOTTEDCIRCLE).n? complex_syllable_tail;
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104 symbol_cluster = symbol syllable_tail;
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105 broken_cluster = reph? n? complex_syllable_tail;
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106 other = any;
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107
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108 main := |*
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109 consonant_syllable => { found_syllable (indic_consonant_syllable); };
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110 vowel_syllable => { found_syllable (indic_vowel_syllable); };
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111 standalone_cluster => { found_syllable (indic_standalone_cluster); };
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112 symbol_cluster => { found_syllable (indic_symbol_cluster); };
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113 broken_cluster => { found_syllable (indic_broken_cluster); buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE; };
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114 other => { found_syllable (indic_non_indic_cluster); };
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115 *|;
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116
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117
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118 }%%
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119
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120 #define found_syllable(syllable_type) \
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121 HB_STMT_START { \
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122 if (0) fprintf (stderr, "syllable %d..%d %s\n", ts, te, #syllable_type); \
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123 for (unsigned int i = ts; i < te; i++) \
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124 info[i].syllable() = (syllable_serial << 4) | syllable_type; \
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125 syllable_serial++; \
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126 if (syllable_serial == 16) syllable_serial = 1; \
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127 } HB_STMT_END
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128
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129 inline void
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130 find_syllables_indic (hb_buffer_t *buffer)
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131 {
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132 unsigned int p, pe, eof, ts, te, act;
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133 int cs;
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134 hb_glyph_info_t *info = buffer->info;
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135 %%{
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136 write init;
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137 getkey info[p].indic_category();
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138 }%%
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139
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140 p = 0;
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141 pe = eof = buffer->len;
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142
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143 unsigned int syllable_serial = 1;
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144 %%{
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145 write exec;
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146 }%%
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147 }
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148
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149 #undef found_syllable
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150
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151 #endif /* HB_OT_SHAPER_INDIC_MACHINE_HH */