2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2011 Codethink Limited
4 * Copyright © 2010,2011 Google, Inc.
6 * This is part of HarfBuzz, a text shaping library.
8 * Permission is hereby granted, without written agreement and without
9 * license or royalty fees, to use, copy, modify, and distribute this
10 * software and its documentation for any purpose, provided that the
11 * above copyright notice and the following two paragraphs appear in
12 * all copies of this software.
14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
26 * Red Hat Author(s): Behdad Esfahbod
27 * Codethink Author(s): Ryan Lortie
28 * Google Author(s): Behdad Esfahbod
31 #ifndef HB_UNICODE_PRIVATE_HH
32 #define HB_UNICODE_PRIVATE_HH
34 #include "hb-private.hh"
36 #include "hb-unicode.h"
37 #include "hb-object-private.hh"
45 #define HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS \
46 HB_UNICODE_FUNC_IMPLEMENT (combining_class) \
47 HB_UNICODE_FUNC_IMPLEMENT (eastasian_width) \
48 HB_UNICODE_FUNC_IMPLEMENT (general_category) \
49 HB_UNICODE_FUNC_IMPLEMENT (mirroring) \
50 HB_UNICODE_FUNC_IMPLEMENT (script) \
51 HB_UNICODE_FUNC_IMPLEMENT (compose) \
52 HB_UNICODE_FUNC_IMPLEMENT (decompose) \
53 /* ^--- Add new callbacks here */
55 /* Simple callbacks are those taking a hb_codepoint_t and returning a hb_codepoint_t */
56 #define HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE \
57 HB_UNICODE_FUNC_IMPLEMENT (unsigned int, combining_class) \
58 HB_UNICODE_FUNC_IMPLEMENT (unsigned int, eastasian_width) \
59 HB_UNICODE_FUNC_IMPLEMENT (hb_unicode_general_category_t, general_category) \
60 HB_UNICODE_FUNC_IMPLEMENT (hb_codepoint_t, mirroring) \
61 HB_UNICODE_FUNC_IMPLEMENT (hb_script_t, script) \
62 /* ^--- Add new simple callbacks here */
64 struct _hb_unicode_funcs_t {
65 hb_object_header_t header;
68 hb_unicode_funcs_t *parent;
72 /* Don't access these directly. Call hb_unicode_*() instead. */
75 #define HB_UNICODE_FUNC_IMPLEMENT(name) hb_unicode_##name##_func_t name;
76 HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
77 #undef HB_UNICODE_FUNC_IMPLEMENT
81 #define HB_UNICODE_FUNC_IMPLEMENT(name) void *name;
82 HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
83 #undef HB_UNICODE_FUNC_IMPLEMENT
87 #define HB_UNICODE_FUNC_IMPLEMENT(name) hb_destroy_func_t name;
88 HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
89 #undef HB_UNICODE_FUNC_IMPLEMENT
95 extern HB_INTERNAL const hb_unicode_funcs_t _hb_glib_unicode_funcs;
96 #define _hb_unicode_funcs_default _hb_glib_unicode_funcs
97 #elif defined(HAVE_ICU)
98 extern HB_INTERNAL const hb_unicode_funcs_t _hb_icu_unicode_funcs;
99 #define _hb_unicode_funcs_default _hb_icu_unicode_funcs
101 #define HB_UNICODE_FUNCS_NIL 1
102 extern HB_INTERNAL const hb_unicode_funcs_t _hb_unicode_funcs_nil;
103 #define _hb_unicode_funcs_default _hb_unicode_funcs_nil
107 HB_INTERNAL unsigned int
108 _hb_unicode_modified_combining_class (hb_unicode_funcs_t *ufuncs,
109 hb_codepoint_t unicode);
111 static inline hb_bool_t
112 _hb_unicode_is_variation_selector (hb_codepoint_t unicode)
114 return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */
115 (unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */
116 (unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */
119 /* Zero-Width invisible characters:
122 * 034F COMBINING GRAPHEME JOINER
124 * 200B ZERO WIDTH SPACE
125 * 200C ZERO WIDTH NON-JOINER
126 * 200D ZERO WIDTH JOINER
127 * 200E LEFT-TO-RIGHT MARK
128 * 200F RIGHT-TO-LEFT MARK
130 * 2028 LINE SEPARATOR
132 * 202A LEFT-TO-RIGHT EMBEDDING
133 * 202B RIGHT-TO-LEFT EMBEDDING
134 * 202C POP DIRECTIONAL FORMATTING
135 * 202D LEFT-TO-RIGHT OVERRIDE
136 * 202E RIGHT-TO-LEFT OVERRIDE
139 * 2061 FUNCTION APPLICATION
140 * 2062 INVISIBLE TIMES
141 * 2063 INVISIBLE SEPARATOR
143 * FEFF ZERO WIDTH NO-BREAK SPACE
145 static inline hb_bool_t
146 _hb_unicode_is_zero_width (hb_codepoint_t ch)
148 return ((ch & ~0x007F) == 0x2000 && (
149 (ch >= 0x200B && ch <= 0x200F) ||
150 (ch >= 0x202A && ch <= 0x202E) ||
151 (ch >= 0x2060 && ch <= 0x2063) ||
153 )) || unlikely (ch == 0x0009
159 #endif /* HB_UNICODE_PRIVATE_HH */