1/*
2 * Copyright (C) 2012 Grigori Goronzy <greg@kinoho.net>
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "hb.hh"
18#include "hb-unicode.hh"
19#include "hb-machinery.hh"
20
21#include "hb-ucd-table.hh"
22
23static hb_unicode_combining_class_t
24hb_ucd_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
25 hb_codepoint_t unicode,
26 void *user_data HB_UNUSED)
27{
28 return (hb_unicode_combining_class_t) _hb_ucd_ccc (unicode);
29}
30
31static hb_unicode_general_category_t
32hb_ucd_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
33 hb_codepoint_t unicode,
34 void *user_data HB_UNUSED)
35{
36 return (hb_unicode_general_category_t) _hb_ucd_gc (unicode);
37}
38
39static hb_codepoint_t
40hb_ucd_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
41 hb_codepoint_t unicode,
42 void *user_data HB_UNUSED)
43{
44 return unicode + _hb_ucd_bmg (unicode);
45}
46
47static hb_script_t
48hb_ucd_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
49 hb_codepoint_t unicode,
50 void *user_data HB_UNUSED)
51{
52 return _hb_ucd_sc_map[_hb_ucd_sc (unicode)];
53}
54
55
56#define SBASE 0xAC00u
57#define LBASE 0x1100u
58#define VBASE 0x1161u
59#define TBASE 0x11A7u
60#define SCOUNT 11172u
61#define LCOUNT 19u
62#define VCOUNT 21u
63#define TCOUNT 28u
64#define NCOUNT (VCOUNT * TCOUNT)
65
66static inline bool
67_hb_ucd_decompose_hangul (hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b)
68{
69 unsigned si = ab - SBASE;
70
71 if (si >= SCOUNT)
72 return false;
73
74 if (si % TCOUNT)
75 {
76 /* LV,T */
77 *a = SBASE + (si / TCOUNT) * TCOUNT;
78 *b = TBASE + (si % TCOUNT);
79 return true;
80 } else {
81 /* L,V */
82 *a = LBASE + (si / NCOUNT);
83 *b = VBASE + (si % NCOUNT) / TCOUNT;
84 return true;
85 }
86}
87
88static inline bool
89_hb_ucd_compose_hangul (hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab)
90{
91 if (a >= SBASE && a < (SBASE + SCOUNT) && b > TBASE && b < (TBASE + TCOUNT) &&
92 !((a - SBASE) % TCOUNT))
93 {
94 /* LV,T */
95 *ab = a + (b - TBASE);
96 return true;
97 }
98 else if (a >= LBASE && a < (LBASE + LCOUNT) && b >= VBASE && b < (VBASE + VCOUNT))
99 {
100 /* L,V */
101 int li = a - LBASE;
102 int vi = b - VBASE;
103 *ab = SBASE + li * NCOUNT + vi * TCOUNT;
104 return true;
105 }
106 else
107 return false;
108}
109
110static int
111_cmp_pair (const void *_key, const void *_item)
112{
113 uint64_t& a = * (uint64_t*) _key;
114 uint64_t b = (* (uint64_t*) _item) & HB_CODEPOINT_ENCODE3(0x1FFFFFu, 0x1FFFFFu, 0);
115
116 return a < b ? -1 : a > b ? +1 : 0;
117}
118static int
119_cmp_pair_11_7_14 (const void *_key, const void *_item)
120{
121 uint32_t& a = * (uint32_t*) _key;
122 uint32_t b = (* (uint32_t*) _item) & HB_CODEPOINT_ENCODE3_11_7_14(0x1FFFFFu, 0x1FFFFFu, 0);
123
124 return a < b ? -1 : a > b ? +1 : 0;
125}
126
127static hb_bool_t
128hb_ucd_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
129 hb_codepoint_t a, hb_codepoint_t b, hb_codepoint_t *ab,
130 void *user_data HB_UNUSED)
131{
132 if (_hb_ucd_compose_hangul (a, b, ab)) return true;
133
134 hb_codepoint_t u = 0;
135
136 if ((a & 0xFFFFF800u) == 0x0000u && (b & 0xFFFFFF80) == 0x0300u)
137 {
138 uint32_t k = HB_CODEPOINT_ENCODE3_11_7_14 (a, b, 0);
139 const uint32_t *v = hb_bsearch (k,
140 _hb_ucd_dm2_u32_map,
141 ARRAY_LENGTH (_hb_ucd_dm2_u32_map),
142 sizeof (*_hb_ucd_dm2_u32_map),
143 _cmp_pair_11_7_14);
144 if (likely (!v)) return false;
145 u = HB_CODEPOINT_DECODE3_11_7_14_3 (*v);
146 }
147 else
148 {
149 uint64_t k = HB_CODEPOINT_ENCODE3 (a, b, 0);
150 const uint64_t *v = hb_bsearch (k,
151 _hb_ucd_dm2_u64_map,
152 ARRAY_LENGTH (_hb_ucd_dm2_u64_map),
153 sizeof (*_hb_ucd_dm2_u64_map),
154 _cmp_pair);
155 if (likely (!v)) return false;
156 u = HB_CODEPOINT_DECODE3_3 (*v);
157 }
158
159 if (unlikely (!u)) return false;
160 *ab = u;
161 return true;
162}
163
164static hb_bool_t
165hb_ucd_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
166 hb_codepoint_t ab, hb_codepoint_t *a, hb_codepoint_t *b,
167 void *user_data HB_UNUSED)
168{
169 if (_hb_ucd_decompose_hangul (ab, a, b)) return true;
170
171 unsigned i = _hb_ucd_dm (ab);
172
173 if (likely (!i)) return false;
174 i--;
175
176 if (i < ARRAY_LENGTH (_hb_ucd_dm1_p0_map) + ARRAY_LENGTH (_hb_ucd_dm1_p2_map))
177 {
178 if (i < ARRAY_LENGTH (_hb_ucd_dm1_p0_map))
179 *a = _hb_ucd_dm1_p0_map[i];
180 else
181 {
182 i -= ARRAY_LENGTH (_hb_ucd_dm1_p0_map);
183 *a = 0x20000 | _hb_ucd_dm1_p2_map[i];
184 }
185 *b = 0;
186 return true;
187 }
188 i -= ARRAY_LENGTH (_hb_ucd_dm1_p0_map) + ARRAY_LENGTH (_hb_ucd_dm1_p2_map);
189
190 if (i < ARRAY_LENGTH (_hb_ucd_dm2_u32_map))
191 {
192 uint32_t v = _hb_ucd_dm2_u32_map[i];
193 *a = HB_CODEPOINT_DECODE3_11_7_14_1 (v);
194 *b = HB_CODEPOINT_DECODE3_11_7_14_2 (v);
195 return true;
196 }
197 i -= ARRAY_LENGTH (_hb_ucd_dm2_u32_map);
198
199 uint64_t v = _hb_ucd_dm2_u64_map[i];
200 *a = HB_CODEPOINT_DECODE3_1 (v);
201 *b = HB_CODEPOINT_DECODE3_2 (v);
202 return true;
203}
204
205
206#if HB_USE_ATEXIT
207static void free_static_ucd_funcs ();
208#endif
209
210static struct hb_ucd_unicode_funcs_lazy_loader_t : hb_unicode_funcs_lazy_loader_t<hb_ucd_unicode_funcs_lazy_loader_t>
211{
212 static hb_unicode_funcs_t *create ()
213 {
214 hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (nullptr);
215
216 hb_unicode_funcs_set_combining_class_func (funcs, hb_ucd_combining_class, nullptr, nullptr);
217 hb_unicode_funcs_set_general_category_func (funcs, hb_ucd_general_category, nullptr, nullptr);
218 hb_unicode_funcs_set_mirroring_func (funcs, hb_ucd_mirroring, nullptr, nullptr);
219 hb_unicode_funcs_set_script_func (funcs, hb_ucd_script, nullptr, nullptr);
220 hb_unicode_funcs_set_compose_func (funcs, hb_ucd_compose, nullptr, nullptr);
221 hb_unicode_funcs_set_decompose_func (funcs, hb_ucd_decompose, nullptr, nullptr);
222
223 hb_unicode_funcs_make_immutable (funcs);
224
225#if HB_USE_ATEXIT
226 atexit (free_static_ucd_funcs);
227#endif
228
229 return funcs;
230 }
231} static_ucd_funcs;
232
233#if HB_USE_ATEXIT
234static
235void free_static_ucd_funcs ()
236{
237 static_ucd_funcs.free_instance ();
238}
239#endif
240
241hb_unicode_funcs_t *
242hb_ucd_get_unicode_funcs ()
243{
244#ifdef HB_NO_UCD
245 return hb_unicode_funcs_get_empty ();
246#endif
247 return static_ucd_funcs.get_unconst ();
248}
249