forked from brandonros/quickjs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
libunicode.c
1538 lines (1449 loc) · 45.3 KB
/
libunicode.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Unicode utilities
*
* Copyright (c) 2017-2018 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include "cutils.h"
#include "libunicode.h"
#include "libunicode-table.h"
enum {
RUN_TYPE_U,
RUN_TYPE_L,
RUN_TYPE_UF,
RUN_TYPE_LF,
RUN_TYPE_UL,
RUN_TYPE_LSU,
RUN_TYPE_U2L_399_EXT2,
RUN_TYPE_UF_D20,
RUN_TYPE_UF_D1_EXT,
RUN_TYPE_U_EXT,
RUN_TYPE_LF_EXT,
RUN_TYPE_U_EXT2,
RUN_TYPE_L_EXT2,
RUN_TYPE_U_EXT3,
};
/* conv_type:
0 = to upper
1 = to lower
2 = case folding (= to lower with modifications)
*/
int lre_case_conv(uint32_t *res, uint32_t c, int conv_type)
{
if (c < 128) {
if (conv_type) {
if (c >= 'A' && c <= 'Z') {
c = c - 'A' + 'a';
}
} else {
if (c >= 'a' && c <= 'z') {
c = c - 'a' + 'A';
}
}
} else {
uint32_t v, code, data, type, len, a, is_lower;
int idx, idx_min, idx_max;
is_lower = (conv_type != 0);
idx_min = 0;
idx_max = countof(case_conv_table1) - 1;
while (idx_min <= idx_max) {
idx = (unsigned)(idx_max + idx_min) / 2;
v = case_conv_table1[idx];
code = v >> (32 - 17);
len = (v >> (32 - 17 - 7)) & 0x7f;
if (c < code) {
idx_max = idx - 1;
} else if (c >= code + len) {
idx_min = idx + 1;
} else {
type = (v >> (32 - 17 - 7 - 4)) & 0xf;
data = ((v & 0xf) << 8) | case_conv_table2[idx];
switch(type) {
case RUN_TYPE_U:
case RUN_TYPE_L:
case RUN_TYPE_UF:
case RUN_TYPE_LF:
if (conv_type == (type & 1) ||
(type >= RUN_TYPE_UF && conv_type == 2)) {
c = c - code + (case_conv_table1[data] >> (32 - 17));
}
break;
case RUN_TYPE_UL:
a = c - code;
if ((a & 1) != (1 - is_lower))
break;
c = (a ^ 1) + code;
break;
case RUN_TYPE_LSU:
a = c - code;
if (a == 1) {
c += 2 * is_lower - 1;
} else if (a == (1 - is_lower) * 2) {
c += (2 * is_lower - 1) * 2;
}
break;
case RUN_TYPE_U2L_399_EXT2:
if (!is_lower) {
res[0] = c - code + case_conv_ext[data >> 6];
res[1] = 0x399;
return 2;
} else {
c = c - code + case_conv_ext[data & 0x3f];
}
break;
case RUN_TYPE_UF_D20:
if (conv_type == 1)
break;
c = data + (conv_type == 2) * 0x20;
break;
case RUN_TYPE_UF_D1_EXT:
if (conv_type == 1)
break;
c = case_conv_ext[data] + (conv_type == 2);
break;
case RUN_TYPE_U_EXT:
case RUN_TYPE_LF_EXT:
if (is_lower != (type - RUN_TYPE_U_EXT))
break;
c = case_conv_ext[data];
break;
case RUN_TYPE_U_EXT2:
case RUN_TYPE_L_EXT2:
if (conv_type != (type - RUN_TYPE_U_EXT2))
break;
res[0] = c - code + case_conv_ext[data >> 6];
res[1] = case_conv_ext[data & 0x3f];
return 2;
default:
case RUN_TYPE_U_EXT3:
if (conv_type != 0)
break;
res[0] = case_conv_ext[data >> 8];
res[1] = case_conv_ext[(data >> 4) & 0xf];
res[2] = case_conv_ext[data & 0xf];
return 3;
}
break;
}
}
}
res[0] = c;
return 1;
}
static uint32_t get_le24(const uint8_t *ptr)
{
#if defined(__x86__) || defined(__x86_64__)
return *(uint16_t *)ptr | (ptr[2] << 16);
#else
return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16);
#endif
}
#define UNICODE_INDEX_BLOCK_LEN 32
/* return -1 if not in table, otherwise the offset in the block */
static int get_index_pos(uint32_t *pcode, uint32_t c,
const uint8_t *index_table, int index_table_len)
{
uint32_t code, v;
int idx_min, idx_max, idx;
idx_min = 0;
v = get_le24(index_table);
code = v & ((1 << 21) - 1);
if (c < code) {
*pcode = 0;
return 0;
}
idx_max = index_table_len - 1;
code = get_le24(index_table + idx_max * 3);
if (c >= code)
return -1;
/* invariant: tab[idx_min] <= c < tab2[idx_max] */
while ((idx_max - idx_min) > 1) {
idx = (idx_max + idx_min) / 2;
v = get_le24(index_table + idx * 3);
code = v & ((1 << 21) - 1);
if (c < code) {
idx_max = idx;
} else {
idx_min = idx;
}
}
v = get_le24(index_table + idx_min * 3);
*pcode = v & ((1 << 21) - 1);
return (idx_min + 1) * UNICODE_INDEX_BLOCK_LEN + (v >> 21);
}
static BOOL lre_is_in_table(uint32_t c, const uint8_t *table,
const uint8_t *index_table, int index_table_len)
{
uint32_t code, b, bit;
int pos;
const uint8_t *p;
pos = get_index_pos(&code, c, index_table, index_table_len);
if (pos < 0)
return FALSE; /* outside the table */
p = table + pos;
bit = 0;
for(;;) {
b = *p++;
if (b < 64) {
code += (b >> 3) + 1;
if (c < code)
return bit;
bit ^= 1;
code += (b & 7) + 1;
} else if (b >= 0x80) {
code += b - 0x80 + 1;
} else if (b < 0x60) {
code += (((b - 0x40) << 8) | p[0]) + 1;
p++;
} else {
code += (((b - 0x60) << 16) | (p[0] << 8) | p[1]) + 1;
p += 2;
}
if (c < code)
return bit;
bit ^= 1;
}
}
BOOL lre_is_cased(uint32_t c)
{
uint32_t v, code, len;
int idx, idx_min, idx_max;
idx_min = 0;
idx_max = countof(case_conv_table1) - 1;
while (idx_min <= idx_max) {
idx = (unsigned)(idx_max + idx_min) / 2;
v = case_conv_table1[idx];
code = v >> (32 - 17);
len = (v >> (32 - 17 - 7)) & 0x7f;
if (c < code) {
idx_max = idx - 1;
} else if (c >= code + len) {
idx_min = idx + 1;
} else {
return TRUE;
}
}
return lre_is_in_table(c, unicode_prop_Cased1_table,
unicode_prop_Cased1_index,
sizeof(unicode_prop_Cased1_index) / 3);
}
BOOL lre_is_case_ignorable(uint32_t c)
{
return lre_is_in_table(c, unicode_prop_Case_Ignorable_table,
unicode_prop_Case_Ignorable_index,
sizeof(unicode_prop_Case_Ignorable_index) / 3);
}
/* character range */
static __attribute__((unused)) void cr_dump(CharRange *cr)
{
int i;
for(i = 0; i < cr->len; i++)
printf("%d: 0x%04x\n", i, cr->points[i]);
}
static void *cr_default_realloc(void *opaque, void *ptr, size_t size)
{
return realloc(ptr, size);
}
void cr_init(CharRange *cr, void *mem_opaque, DynBufReallocFunc *realloc_func)
{
cr->len = cr->size = 0;
cr->points = NULL;
cr->mem_opaque = mem_opaque;
cr->realloc_func = realloc_func ? realloc_func : cr_default_realloc;
}
void cr_free(CharRange *cr)
{
cr->realloc_func(cr->mem_opaque, cr->points, 0);
}
int cr_realloc(CharRange *cr, int size)
{
int new_size;
uint32_t *new_buf;
if (size > cr->size) {
new_size = max_int(size, cr->size * 3 / 2);
new_buf = cr->realloc_func(cr->mem_opaque, cr->points,
new_size * sizeof(cr->points[0]));
if (!new_buf)
return -1;
cr->points = new_buf;
cr->size = new_size;
}
return 0;
}
int cr_copy(CharRange *cr, const CharRange *cr1)
{
if (cr_realloc(cr, cr1->len))
return -1;
memcpy(cr->points, cr1->points, sizeof(cr->points[0]) * cr1->len);
cr->len = cr1->len;
return 0;
}
/* merge consecutive intervals and remove empty intervals */
static void cr_compress(CharRange *cr)
{
int i, j, k, len;
uint32_t *pt;
pt = cr->points;
len = cr->len;
i = 0;
j = 0;
k = 0;
while ((i + 1) < len) {
if (pt[i] == pt[i + 1]) {
/* empty interval */
i += 2;
} else {
j = i;
while ((j + 3) < len && pt[j + 1] == pt[j + 2])
j += 2;
/* just copy */
pt[k] = pt[i];
pt[k + 1] = pt[j + 1];
k += 2;
i = j + 2;
}
}
cr->len = k;
}
/* union or intersection */
int cr_op(CharRange *cr, const uint32_t *a_pt, int a_len,
const uint32_t *b_pt, int b_len, int op)
{
int a_idx, b_idx, is_in;
uint32_t v;
a_idx = 0;
b_idx = 0;
for(;;) {
/* get one more point from a or b in increasing order */
if (a_idx < a_len && b_idx < b_len) {
if (a_pt[a_idx] < b_pt[b_idx]) {
goto a_add;
} else if (a_pt[a_idx] == b_pt[b_idx]) {
v = a_pt[a_idx];
a_idx++;
b_idx++;
} else {
goto b_add;
}
} else if (a_idx < a_len) {
a_add:
v = a_pt[a_idx++];
} else if (b_idx < b_len) {
b_add:
v = b_pt[b_idx++];
} else {
break;
}
/* add the point if the in/out status changes */
switch(op) {
case CR_OP_UNION:
is_in = (a_idx & 1) | (b_idx & 1);
break;
case CR_OP_INTER:
is_in = (a_idx & 1) & (b_idx & 1);
break;
case CR_OP_XOR:
is_in = (a_idx & 1) ^ (b_idx & 1);
break;
default:
abort();
}
if (is_in != (cr->len & 1)) {
if (cr_add_point(cr, v))
return -1;
}
}
cr_compress(cr);
return 0;
}
int cr_union1(CharRange *cr, const uint32_t *b_pt, int b_len)
{
CharRange a = *cr;
int ret;
cr->len = 0;
cr->size = 0;
cr->points = NULL;
ret = cr_op(cr, a.points, a.len, b_pt, b_len, CR_OP_UNION);
cr_free(&a);
return ret;
}
int cr_invert(CharRange *cr)
{
int len;
len = cr->len;
if (cr_realloc(cr, len + 2))
return -1;
memmove(cr->points + 1, cr->points, len * sizeof(cr->points[0]));
cr->points[0] = 0;
cr->points[len + 1] = UINT32_MAX;
cr->len = len + 2;
cr_compress(cr);
return 0;
}
#ifdef CONFIG_ALL_UNICODE
BOOL lre_is_id_start(uint32_t c)
{
return lre_is_in_table(c, unicode_prop_ID_Start_table,
unicode_prop_ID_Start_index,
sizeof(unicode_prop_ID_Start_index) / 3);
}
BOOL lre_is_id_continue(uint32_t c)
{
return lre_is_id_start(c) ||
lre_is_in_table(c, unicode_prop_ID_Continue1_table,
unicode_prop_ID_Continue1_index,
sizeof(unicode_prop_ID_Continue1_index) / 3);
}
#define UNICODE_DECOMP_LEN_MAX 18
typedef enum {
DECOMP_TYPE_C1, /* 16 bit char */
DECOMP_TYPE_L1, /* 16 bit char table */
DECOMP_TYPE_L2,
DECOMP_TYPE_L3,
DECOMP_TYPE_L4,
DECOMP_TYPE_L5, /* XXX: not used */
DECOMP_TYPE_L6, /* XXX: could remove */
DECOMP_TYPE_L7, /* XXX: could remove */
DECOMP_TYPE_LL1, /* 18 bit char table */
DECOMP_TYPE_LL2,
DECOMP_TYPE_S1, /* 8 bit char table */
DECOMP_TYPE_S2,
DECOMP_TYPE_S3,
DECOMP_TYPE_S4,
DECOMP_TYPE_S5,
DECOMP_TYPE_I1, /* increment 16 bit char value */
DECOMP_TYPE_I2_0,
DECOMP_TYPE_I2_1,
DECOMP_TYPE_I3_1,
DECOMP_TYPE_I3_2,
DECOMP_TYPE_I4_1,
DECOMP_TYPE_I4_2,
DECOMP_TYPE_B1, /* 16 bit base + 8 bit offset */
DECOMP_TYPE_B2,
DECOMP_TYPE_B3,
DECOMP_TYPE_B4,
DECOMP_TYPE_B5,
DECOMP_TYPE_B6,
DECOMP_TYPE_B7,
DECOMP_TYPE_B8,
DECOMP_TYPE_B18,
DECOMP_TYPE_LS2,
DECOMP_TYPE_PAT3,
DECOMP_TYPE_S2_UL,
DECOMP_TYPE_LS2_UL,
} DecompTypeEnum;
static uint32_t unicode_get_short_code(uint32_t c)
{
static const uint16_t unicode_short_table[2] = { 0x2044, 0x2215 };
if (c < 0x80)
return c;
else if (c < 0x80 + 0x50)
return c - 0x80 + 0x300;
else
return unicode_short_table[c - 0x80 - 0x50];
}
static uint32_t unicode_get_lower_simple(uint32_t c)
{
if (c < 0x100 || (c >= 0x410 && c <= 0x42f))
c += 0x20;
else
c++;
return c;
}
static uint16_t unicode_get16(const uint8_t *p)
{
return p[0] | (p[1] << 8);
}
static int unicode_decomp_entry(uint32_t *res, uint32_t c,
int idx, uint32_t code, uint32_t len,
uint32_t type)
{
uint32_t c1;
int l, i, p;
const uint8_t *d;
if (type == DECOMP_TYPE_C1) {
res[0] = unicode_decomp_table2[idx];
return 1;
} else {
d = unicode_decomp_data + unicode_decomp_table2[idx];
switch(type) {
case DECOMP_TYPE_L1 ... DECOMP_TYPE_L7:
l = type - DECOMP_TYPE_L1 + 1;
d += (c - code) * l * 2;
for(i = 0; i < l; i++) {
if ((res[i] = unicode_get16(d + 2 * i)) == 0)
return 0;
}
return l;
case DECOMP_TYPE_LL1 ... DECOMP_TYPE_LL2:
{
uint32_t k, p;
l = type - DECOMP_TYPE_LL1 + 1;
k = (c - code) * l;
p = len * l * 2;
for(i = 0; i < l; i++) {
c1 = unicode_get16(d + 2 * k) |
(((d[p + (k / 4)] >> ((k % 4) * 2)) & 3) << 16);
if (!c1)
return 0;
res[i] = c1;
k++;
}
}
return l;
case DECOMP_TYPE_S1 ... DECOMP_TYPE_S5:
l = type - DECOMP_TYPE_S1 + 1;
d += (c - code) * l;
for(i = 0; i < l; i++) {
if ((res[i] = unicode_get_short_code(d[i])) == 0)
return 0;
}
return l;
case DECOMP_TYPE_I1:
l = 1;
p = 0;
goto decomp_type_i;
case DECOMP_TYPE_I2_0:
case DECOMP_TYPE_I2_1:
case DECOMP_TYPE_I3_1:
case DECOMP_TYPE_I3_2:
case DECOMP_TYPE_I4_1:
case DECOMP_TYPE_I4_2:
l = 2 + ((type - DECOMP_TYPE_I2_0) >> 1);
p = ((type - DECOMP_TYPE_I2_0) & 1) + (l > 2);
decomp_type_i:
for(i = 0; i < l; i++) {
c1 = unicode_get16(d + 2 * i);
if (i == p)
c1 += c - code;
res[i] = c1;
}
return l;
case DECOMP_TYPE_B18:
l = 18;
goto decomp_type_b;
case DECOMP_TYPE_B1 ... DECOMP_TYPE_B8:
l = type - DECOMP_TYPE_B1 + 1;
decomp_type_b:
{
uint32_t c_min;
c_min = unicode_get16(d);
d += 2 + (c - code) * l;
for(i = 0; i < l; i++) {
c1 = d[i];
if (c1 == 0xff)
c1 = 0x20;
else
c1 += c_min;
res[i] = c1;
}
}
return l;
case DECOMP_TYPE_LS2:
d += (c - code) * 3;
if (!(res[0] = unicode_get16(d)))
return 0;
res[1] = unicode_get_short_code(d[2]);
return 2;
case DECOMP_TYPE_PAT3:
res[0] = unicode_get16(d);
res[2] = unicode_get16(d + 2);
d += 4 + (c - code) * 2;
res[1] = unicode_get16(d);
return 3;
case DECOMP_TYPE_S2_UL:
case DECOMP_TYPE_LS2_UL:
c1 = c - code;
if (type == DECOMP_TYPE_S2_UL) {
d += c1 & ~1;
c = unicode_get_short_code(*d);
d++;
} else {
d += (c1 >> 1) * 3;
c = unicode_get16(d);
d += 2;
}
if (c1 & 1)
c = unicode_get_lower_simple(c);
res[0] = c;
res[1] = unicode_get_short_code(*d);
return 2;
}
}
return 0;
}
/* return the length of the decomposition (length <=
UNICODE_DECOMP_LEN_MAX) or 0 if no decomposition */
static int unicode_decomp_char(uint32_t *res, uint32_t c, BOOL is_compat1)
{
uint32_t v, type, is_compat, code, len;
int idx_min, idx_max, idx;
idx_min = 0;
idx_max = countof(unicode_decomp_table1) - 1;
while (idx_min <= idx_max) {
idx = (idx_max + idx_min) / 2;
v = unicode_decomp_table1[idx];
code = v >> (32 - 18);
len = (v >> (32 - 18 - 7)) & 0x7f;
// printf("idx=%d code=%05x len=%d\n", idx, code, len);
if (c < code) {
idx_max = idx - 1;
} else if (c >= code + len) {
idx_min = idx + 1;
} else {
is_compat = v & 1;
if (is_compat1 < is_compat)
break;
type = (v >> (32 - 18 - 7 - 6)) & 0x3f;
return unicode_decomp_entry(res, c, idx, code, len, type);
}
}
return 0;
}
/* return 0 if no pair found */
static int unicode_compose_pair(uint32_t c0, uint32_t c1)
{
uint32_t code, len, type, v, idx1, d_idx, d_offset, ch;
int idx_min, idx_max, idx, d;
uint32_t pair[2];
idx_min = 0;
idx_max = countof(unicode_comp_table) - 1;
while (idx_min <= idx_max) {
idx = (idx_max + idx_min) / 2;
idx1 = unicode_comp_table[idx];
/* idx1 represent an entry of the decomposition table */
d_idx = idx1 >> 6;
d_offset = idx1 & 0x3f;
v = unicode_decomp_table1[d_idx];
code = v >> (32 - 18);
len = (v >> (32 - 18 - 7)) & 0x7f;
type = (v >> (32 - 18 - 7 - 6)) & 0x3f;
ch = code + d_offset;
unicode_decomp_entry(pair, ch, d_idx, code, len, type);
d = c0 - pair[0];
if (d == 0)
d = c1 - pair[1];
if (d < 0) {
idx_max = idx - 1;
} else if (d > 0) {
idx_min = idx + 1;
} else {
return ch;
}
}
return 0;
}
/* return the combining class of character c (between 0 and 255) */
static int unicode_get_cc(uint32_t c)
{
uint32_t code, n, type, cc, c1, b;
int pos;
const uint8_t *p;
pos = get_index_pos(&code, c,
unicode_cc_index, sizeof(unicode_cc_index) / 3);
if (pos < 0)
return 0;
p = unicode_cc_table + pos;
for(;;) {
b = *p++;
type = b >> 6;
n = b & 0x3f;
if (n < 48) {
} else if (n < 56) {
n = (n - 48) << 8;
n |= *p++;
n += 48;
} else {
n = (n - 56) << 8;
n |= *p++ << 8;
n |= *p++;
n += 48 + (1 << 11);
}
if (type <= 1)
p++;
c1 = code + n + 1;
if (c < c1) {
switch(type) {
case 0:
cc = p[-1];
break;
case 1:
cc = p[-1] + c - code;
break;
case 2:
cc = 0;
break;
default:
case 3:
cc = 230;
break;
}
return cc;
}
code = c1;
}
}
static void sort_cc(int *buf, int len)
{
int i, j, k, cc, cc1, start, ch1;
for(i = 0; i < len; i++) {
cc = unicode_get_cc(buf[i]);
if (cc != 0) {
start = i;
j = i + 1;
while (j < len) {
ch1 = buf[j];
cc1 = unicode_get_cc(ch1);
if (cc1 == 0)
break;
k = j - 1;
while (k >= start) {
if (unicode_get_cc(buf[k]) <= cc1)
break;
buf[k + 1] = buf[k];
k--;
}
buf[k + 1] = ch1;
j++;
}
#if 0
printf("cc:");
for(k = start; k < j; k++) {
printf(" %3d", unicode_get_cc(buf[k]));
}
printf("\n");
#endif
i = j;
}
}
}
static void to_nfd_rec(DynBuf *dbuf,
const int *src, int src_len, int is_compat)
{
uint32_t c, v;
int i, l;
uint32_t res[UNICODE_DECOMP_LEN_MAX];
for(i = 0; i < src_len; i++) {
c = src[i];
if (c >= 0xac00 && c < 0xd7a4) {
/* Hangul decomposition */
c -= 0xac00;
dbuf_put_u32(dbuf, 0x1100 + c / 588);
dbuf_put_u32(dbuf, 0x1161 + (c % 588) / 28);
v = c % 28;
if (v != 0)
dbuf_put_u32(dbuf, 0x11a7 + v);
} else {
l = unicode_decomp_char(res, c, is_compat);
if (l) {
to_nfd_rec(dbuf, (int *)res, l, is_compat);
} else {
dbuf_put_u32(dbuf, c);
}
}
}
}
/* return 0 if not found */
static int compose_pair(uint32_t c0, uint32_t c1)
{
/* Hangul composition */
if (c0 >= 0x1100 && c0 < 0x1100 + 19 &&
c1 >= 0x1161 && c1 < 0x1161 + 21) {
return 0xac00 + (c0 - 0x1100) * 588 + (c1 - 0x1161) * 28;
} else if (c0 >= 0xac00 && c0 < 0xac00 + 11172 &&
(c0 - 0xac00) % 28 == 0 &&
c1 >= 0x11a7 && c1 < 0x11a7 + 28) {
return c0 + c1 - 0x11a7;
} else {
return unicode_compose_pair(c0, c1);
}
}
int unicode_normalize(uint32_t **pdst, const uint32_t *src, int src_len,
UnicodeNormalizationEnum n_type,
void *opaque, DynBufReallocFunc *realloc_func)
{
int *buf, buf_len, i, p, starter_pos, cc, last_cc, out_len;
BOOL is_compat;
DynBuf dbuf_s, *dbuf = &dbuf_s;
is_compat = n_type >> 1;
dbuf_init2(dbuf, opaque, realloc_func);
if (dbuf_realloc(dbuf, sizeof(int) * src_len))
goto fail;
/* common case: latin1 is unaffected by NFC */
if (n_type == UNICODE_NFC) {
for(i = 0; i < src_len; i++) {
if (src[i] >= 0x100)
goto not_latin1;
}
buf = (int *)dbuf->buf;
memcpy(buf, src, src_len * sizeof(int));
*pdst = (uint32_t *)buf;
return src_len;
not_latin1: ;
}
to_nfd_rec(dbuf, (const int *)src, src_len, is_compat);
if (dbuf_error(dbuf)) {
fail:
*pdst = NULL;
return -1;
}
buf = (int *)dbuf->buf;
buf_len = dbuf->size / sizeof(int);
sort_cc(buf, buf_len);
if (buf_len <= 1 || (n_type & 1) != 0) {
/* NFD / NFKD */
*pdst = (uint32_t *)buf;
return buf_len;
}
i = 1;
out_len = 1;
while (i < buf_len) {
/* find the starter character and test if it is blocked from
the character at 'i' */
last_cc = unicode_get_cc(buf[i]);
starter_pos = out_len - 1;
while (starter_pos >= 0) {
cc = unicode_get_cc(buf[starter_pos]);
if (cc == 0)
break;
if (cc >= last_cc)
goto next;
last_cc = 256;
starter_pos--;
}
if (starter_pos >= 0 &&
(p = compose_pair(buf[starter_pos], buf[i])) != 0) {
buf[starter_pos] = p;
i++;
} else {
next:
buf[out_len++] = buf[i++];
}
}
*pdst = (uint32_t *)buf;
return out_len;
}
/* char ranges for various unicode properties */
static int unicode_find_name(const char *name_table, const char *name)
{
const char *p, *r;
int pos;
size_t name_len, len;
p = name_table;
pos = 0;
name_len = strlen(name);
while (*p) {
for(;;) {
r = strchr(p, ',');
if (!r)
len = strlen(p);
else
len = r - p;
if (len == name_len && !memcmp(p, name, name_len))
return pos;
p += len + 1;
if (!r)
break;
}
pos++;
}
return -1;
}
/* 'cr' must be initialized and empty. Return 0 if OK, -1 if error, -2
if not found */
int unicode_script(CharRange *cr,
const char *script_name, BOOL is_ext)
{
int script_idx;
const uint8_t *p, *p_end;
uint32_t c, c1, b, n, v, v_len, i, type;
CharRange cr1_s, *cr1;
CharRange cr2_s, *cr2 = &cr2_s;
BOOL is_common;
script_idx = unicode_find_name(unicode_script_name_table, script_name);
if (script_idx < 0)
return -2;
/* Note: we remove the "Unknown" Script */
script_idx += UNICODE_SCRIPT_Unknown + 1;
is_common = (script_idx == UNICODE_SCRIPT_Common ||
script_idx == UNICODE_SCRIPT_Inherited);
if (is_ext) {
cr1 = &cr1_s;
cr_init(cr1, cr->mem_opaque, cr->realloc_func);
cr_init(cr2, cr->mem_opaque, cr->realloc_func);
} else {
cr1 = cr;
}
p = unicode_script_table;
p_end = unicode_script_table + countof(unicode_script_table);
c = 0;
while (p < p_end) {
b = *p++;
type = b >> 7;
n = b & 0x7f;
if (n < 96) {
} else if (n < 112) {
n = (n - 96) << 8;
n |= *p++;
n += 96;
} else {
n = (n - 112) << 16;
n |= *p++ << 8;
n |= *p++;
n += 96 + (1 << 12);
}
if (type == 0)
v = 0;
else
v = *p++;
c1 = c + n + 1;
if (v == script_idx) {
if (cr_add_interval(cr1, c, c1))
goto fail;
}
c = c1;
}
if (is_ext) {
/* add the script extensions */
p = unicode_script_ext_table;
p_end = unicode_script_ext_table + countof(unicode_script_ext_table);
c = 0;
while (p < p_end) {