Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-buffer-deserialize-text.rl @ 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
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 © 2013 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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27 #ifndef HB_BUFFER_DESERIALIZE_TEXT_HH
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28 #define HB_BUFFER_DESERIALIZE_TEXT_HH
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30 #include "hb.hh"
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32 %%{
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33
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34 machine deserialize_text;
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35 alphtype unsigned char;
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36 write data;
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37
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38 action clear_item {
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39 hb_memset (&info, 0, sizeof (info));
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40 hb_memset (&pos , 0, sizeof (pos ));
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41 }
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42
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43 action add_item {
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44 buffer->add_info (info);
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45 if (unlikely (!buffer->successful))
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46 return false;
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47 buffer->pos[buffer->len - 1] = pos;
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48 *end_ptr = p;
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49 }
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51 action tok {
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52 tok = p;
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53 }
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55 action ensure_glyphs { if (unlikely (!buffer->ensure_glyphs ())) return false; }
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56 action ensure_unicode { if (unlikely (!buffer->ensure_unicode ())) return false; }
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58 action parse_glyph {
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59 /* TODO Unescape delimiters. */
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60 if (!hb_font_glyph_from_string (font,
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61 tok, p - tok,
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62 &info.codepoint))
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63 return false;
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64 }
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65
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66 action parse_hexdigits {if (!parse_hex (tok, p, &info.codepoint )) return false; }
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68 action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; }
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69 action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; }
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70 action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; }
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71 action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; }
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72 action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; }
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73 action parse_glyph_flags{ if (!parse_uint (tok, p, &info.mask )) return false; }
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74
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75 unum = '0' | [1-9] digit*;
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76 num = '-'? unum;
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78 glyph_id = unum;
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79 glyph_name = ([^\\\]=@+,#|] | '\\' [\\\]=@+,|]) *;
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80
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81 glyph = (glyph_id | glyph_name) >tok %parse_glyph;
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82 cluster = '=' (unum >tok %parse_cluster);
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83 offsets = '@' (num >tok %parse_x_offset) ',' (num >tok %parse_y_offset );
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84 advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?;
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85 glyphflags= '#' (unum >tok %parse_glyph_flags);
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86
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87 glyph_item =
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88 (
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89 glyph
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90 cluster?
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91 offsets?
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92 advances?
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93 glyphflags?
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94 )
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95 >clear_item
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96 @ensure_glyphs
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97 %add_item
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98 ;
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99
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100 unicode = 'U' '+' xdigit+ >tok %parse_hexdigits;
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101
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102 unicode_item =
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103 (
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104 unicode
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105 cluster?
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106 )
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107 >clear_item
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108 @ensure_unicode
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109 %add_item
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110 ;
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111
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112 glyphs = glyph_item (space* '|' space* glyph_item)* space* ('|'|']')?;
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113 unicodes = unicode_item (space* '|' space* unicode_item)* space* ('|'|'>')?;
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114
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115 main := space* ( ('[' glyphs) | ('<' unicodes) );
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116
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117 }%%
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118
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119 static hb_bool_t
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120 _hb_buffer_deserialize_text (hb_buffer_t *buffer,
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121 const char *buf,
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122 unsigned int buf_len,
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123 const char **end_ptr,
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124 hb_font_t *font)
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125 {
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126 const char *p = buf, *pe = buf + buf_len;
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127
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128 /* Ensure we have positions. */
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129 (void) hb_buffer_get_glyph_positions (buffer, nullptr);
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130
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131 while (p < pe && ISSPACE (*p))
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132 p++;
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133
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134 const char *eof = pe, *tok = nullptr;
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135 int cs;
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136 hb_glyph_info_t info = {0};
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137 hb_glyph_position_t pos = {0};
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138 %%{
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139 write init;
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140 write exec;
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141 }%%
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142
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143 *end_ptr = p;
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144
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145 return p == pe && *(p-1) != ']';
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146 }
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147
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148 #endif /* HB_BUFFER_DESERIALIZE_TEXT_HH */