Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/hb-buffer-deserialize-json.rl @ 41:71bcc18e306f

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MERGE: New upstream PyMuPDF v1.26.5 including MuPDF v1.26.10 BUGS: Needs some additional changes yet. Not yet tested.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 15:24:40 +0200
parents b50eed0cc0ef
children
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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_JSON_HH
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28 #define HB_BUFFER_DESERIALIZE_JSON_HH
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29
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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_json;
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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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54
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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_name {
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59 /* TODO Unescape \" and \\ if found. */
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60 if (!hb_font_glyph_from_string (font,
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61 tok+1, p - tok - 2, /* Skip "" */
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62 &info.codepoint))
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63 return false;
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64 }
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66 action parse_codepoint { if (!parse_uint (tok, p, &info.codepoint)) return false; }
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67 action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; }
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68 action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; }
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69 action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; }
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70 action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; }
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71 action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; }
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72 action parse_glyph_flags{ if (!parse_uint (tok, p, &info.mask )) return false; }
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74 unum = '0' | [1-9] digit*;
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75 num = '-'? unum;
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77 comma = space* ',' space*;
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78 colon = space* ':' space*;
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80 codepoint = unum;
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81 glyph_name = '"' ([^\\"] | '\\' [\\"])* '"';
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83 parse_glyph_name = (glyph_name >tok %parse_glyph_name);
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84 parse_codepoint = (codepoint >tok %parse_codepoint);
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86 glyph = "\"g\"" colon (parse_glyph_name | parse_codepoint);
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87 unicode = "\"u\"" colon parse_codepoint;
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88 cluster = "\"cl\"" colon (unum >tok %parse_cluster);
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89 xoffset = "\"dx\"" colon (num >tok %parse_x_offset);
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90 yoffset = "\"dy\"" colon (num >tok %parse_y_offset);
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91 xadvance= "\"ax\"" colon (num >tok %parse_x_advance);
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92 yadvance= "\"ay\"" colon (num >tok %parse_y_advance);
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93 glyphflags="\"fl\"" colon (unum >tok %parse_glyph_flags);
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95 element = glyph @ensure_glyphs
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96 | unicode @ensure_unicode
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97 | cluster
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98 | xoffset
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99 | yoffset
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100 | xadvance
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101 | yadvance
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102 | glyphflags;
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103 item =
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104 ( '{' space* element (comma element)* space* '}')
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105 >clear_item
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106 @add_item
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107 ;
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108
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109 main := space* item (comma item)* space* (','|']')?;
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110
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111 }%%
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112
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113 static hb_bool_t
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114 _hb_buffer_deserialize_json (hb_buffer_t *buffer,
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115 const char *buf,
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116 unsigned int buf_len,
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117 const char **end_ptr,
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118 hb_font_t *font)
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119 {
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120 const char *p = buf, *pe = buf + buf_len;
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121
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122 /* Ensure we have positions. */
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123 (void) hb_buffer_get_glyph_positions (buffer, nullptr);
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124
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125 while (p < pe && ISSPACE (*p))
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126 p++;
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127 if (p < pe && *p == (buffer->len ? ',' : '['))
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128 {
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129 *end_ptr = ++p;
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130 }
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131
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132 const char *tok = nullptr;
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133 int cs;
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134 hb_glyph_info_t info = {0};
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135 hb_glyph_position_t pos = {0};
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136 %%{
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137 write init;
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138 write exec;
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139 }%%
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140
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141 *end_ptr = p;
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142
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143 return p == pe && *(p-1) != ']';
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144 }
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145
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146 #endif /* HB_BUFFER_DESERIALIZE_JSON_HH */