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comparison mupdf-source/thirdparty/harfbuzz/src/hb-buffer-deserialize-text.rl @ 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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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * Copyright © 2013 Google, Inc.
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 *
24 * Google Author(s): Behdad Esfahbod
25 */
26
27 #ifndef HB_BUFFER_DESERIALIZE_TEXT_HH
28 #define HB_BUFFER_DESERIALIZE_TEXT_HH
29
30 #include "hb.hh"
31
32 %%{
33
34 machine deserialize_text;
35 alphtype unsigned char;
36 write data;
37
38 action clear_item {
39 hb_memset (&info, 0, sizeof (info));
40 hb_memset (&pos , 0, sizeof (pos ));
41 }
42
43 action add_item {
44 buffer->add_info (info);
45 if (unlikely (!buffer->successful))
46 return false;
47 buffer->pos[buffer->len - 1] = pos;
48 *end_ptr = p;
49 }
50
51 action tok {
52 tok = p;
53 }
54
55 action ensure_glyphs { if (unlikely (!buffer->ensure_glyphs ())) return false; }
56 action ensure_unicode { if (unlikely (!buffer->ensure_unicode ())) return false; }
57
58 action parse_glyph {
59 /* TODO Unescape delimiters. */
60 if (!hb_font_glyph_from_string (font,
61 tok, p - tok,
62 &info.codepoint))
63 return false;
64 }
65
66 action parse_hexdigits {if (!parse_hex (tok, p, &info.codepoint )) return false; }
67
68 action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; }
69 action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; }
70 action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; }
71 action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; }
72 action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; }
73 action parse_glyph_flags{ if (!parse_uint (tok, p, &info.mask )) return false; }
74
75 unum = '0' | [1-9] digit*;
76 num = '-'? unum;
77
78 glyph_id = unum;
79 glyph_name = ([^\\\]=@+,#|] | '\\' [\\\]=@+,|]) *;
80
81 glyph = (glyph_id | glyph_name) >tok %parse_glyph;
82 cluster = '=' (unum >tok %parse_cluster);
83 offsets = '@' (num >tok %parse_x_offset) ',' (num >tok %parse_y_offset );
84 advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?;
85 glyphflags= '#' (unum >tok %parse_glyph_flags);
86
87 glyph_item =
88 (
89 glyph
90 cluster?
91 offsets?
92 advances?
93 glyphflags?
94 )
95 >clear_item
96 @ensure_glyphs
97 %add_item
98 ;
99
100 unicode = 'U' '+' xdigit+ >tok %parse_hexdigits;
101
102 unicode_item =
103 (
104 unicode
105 cluster?
106 )
107 >clear_item
108 @ensure_unicode
109 %add_item
110 ;
111
112 glyphs = glyph_item (space* '|' space* glyph_item)* space* ('|'|']')?;
113 unicodes = unicode_item (space* '|' space* unicode_item)* space* ('|'|'>')?;
114
115 main := space* ( ('[' glyphs) | ('<' unicodes) );
116
117 }%%
118
119 static hb_bool_t
120 _hb_buffer_deserialize_text (hb_buffer_t *buffer,
121 const char *buf,
122 unsigned int buf_len,
123 const char **end_ptr,
124 hb_font_t *font)
125 {
126 const char *p = buf, *pe = buf + buf_len;
127
128 /* Ensure we have positions. */
129 (void) hb_buffer_get_glyph_positions (buffer, nullptr);
130
131 while (p < pe && ISSPACE (*p))
132 p++;
133
134 const char *eof = pe, *tok = nullptr;
135 int cs;
136 hb_glyph_info_t info = {0};
137 hb_glyph_position_t pos = {0};
138 %%{
139 write init;
140 write exec;
141 }%%
142
143 *end_ptr = p;
144
145 return p == pe && *(p-1) != ']';
146 }
147
148 #endif /* HB_BUFFER_DESERIALIZE_TEXT_HH */