1/*
2 * Copyright © 2018 Ebrahim Byagowi
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
25#ifndef HB_AAT_LTAG_TABLE_HH
26#define HB_AAT_LTAG_TABLE_HH
27
28#include "hb-open-type.hh"
29
30/*
31 * ltag -- Language Tag
32 * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ltag.html
33 */
34#define HB_AAT_TAG_ltag HB_TAG('l','t','a','g')
35
36
37namespace AAT {
38
39using namespace OT;
40
41
42struct FTStringRange
43{
44 friend struct ltag;
45
46 bool sanitize (hb_sanitize_context_t *c, const void *base) const
47 {
48 TRACE_SANITIZE (this);
49 return_trace (c->check_struct (this) && (base+tag).sanitize (c, length));
50 }
51
52 protected:
53 NNOffsetTo<UnsizedArrayOf<HBUINT8>>
54 tag; /* Offset from the start of the table to
55 * the beginning of the string */
56 HBUINT16 length; /* String length (in bytes) */
57 public:
58 DEFINE_SIZE_STATIC (4);
59};
60
61struct ltag
62{
63 static constexpr hb_tag_t tableTag = HB_AAT_TAG_ltag;
64
65 hb_language_t get_language (unsigned int i) const
66 {
67 const FTStringRange &range = tagRanges[i];
68 return hb_language_from_string ((const char *) (this+range.tag).arrayZ,
69 range.length);
70 }
71
72 bool sanitize (hb_sanitize_context_t *c) const
73 {
74 TRACE_SANITIZE (this);
75 return_trace (likely (c->check_struct (this) &&
76 version >= 1 &&
77 tagRanges.sanitize (c, this)));
78 }
79
80 protected:
81 HBUINT32 version; /* Table version; currently 1 */
82 HBUINT32 flags; /* Table flags; currently none defined */
83 LArrayOf<FTStringRange>
84 tagRanges; /* Range for each tag's string */
85 public:
86 DEFINE_SIZE_ARRAY (12, tagRanges);
87};
88
89} /* namespace AAT */
90
91
92#endif /* HB_AAT_LTAG_TABLE_HH */
93