forked from swiftlang/swift-corelibs-foundation
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathCFStringEncodingConverter.c
1029 lines (853 loc) · 47.7 KB
/
CFStringEncodingConverter.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
/* CFStringEncodingConverter.c
Copyright (c) 1998-2016, Apple Inc. and the Swift project authors
Portions Copyright (c) 2014-2016 Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See http://swift.org/LICENSE.txt for license information
See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
Responsibility: Foundation Team
*/
#include "CFInternal.h"
#include <CoreFoundation/CFArray.h>
#include <CoreFoundation/CFDictionary.h>
#include "CFICUConverters.h"
#include <CoreFoundation/CFUniChar.h>
#include <CoreFoundation/CFPriv.h>
#include "CFUnicodeDecomposition.h"
#include "CFStringEncodingConverterExt.h"
#include "CFStringEncodingConverterPriv.h"
#include <stdlib.h>
typedef CFIndex (*_CFToBytesProc)(const void *converter, uint32_t flags, const UniChar *characters, CFIndex numChars, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen);
typedef CFIndex (*_CFToUnicodeProc)(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen);
typedef struct {
const CFStringEncodingConverter *definition;
_CFToBytesProc toBytes;
_CFToUnicodeProc toUnicode;
_CFToUnicodeProc toCanonicalUnicode;
CFStringEncodingToBytesFallbackProc toBytesFallback;
CFStringEncodingToUnicodeFallbackProc toUnicodeFallback;
} _CFEncodingConverter;
/* Macros
*/
#define TO_BYTE(conv,flags,chars,numChars,bytes,max,used) (conv->toBytes ? conv->toBytes(conv,flags,chars,numChars,bytes,max,used) : ((CFStringEncodingToBytesProc)conv->definition->toBytes)(flags,chars,numChars,bytes,max,used))
#define TO_UNICODE(conv,flags,bytes,numBytes,chars,max,used) (conv->toUnicode ? (flags & (kCFStringEncodingUseCanonical|kCFStringEncodingUseHFSPlusCanonical) ? conv->toCanonicalUnicode(conv,flags,bytes,numBytes,chars,max,used) : conv->toUnicode(conv,flags,bytes,numBytes,chars,max,used)) : ((CFStringEncodingToUnicodeProc)conv->definition->toUnicode)(flags,bytes,numBytes,chars,max,used))
#define ASCIINewLine 0x0a
#define kSurrogateHighStart 0xD800
#define kSurrogateHighEnd 0xDBFF
#define kSurrogateLowStart 0xDC00
#define kSurrogateLowEnd 0xDFFF
static const uint8_t __CFMaximumConvertedLength = 20;
/* Mapping 128..255 to lossy ASCII
*/
static const struct {
unsigned char chars[4];
} _toLossyASCIITable[] = {
{{' ', 0, 0, 0}}, // NO-BREAK SPACE
{{'!', 0, 0, 0}}, // INVERTED EXCLAMATION MARK
{{'c', 0, 0, 0}}, // CENT SIGN
{{'L', 0, 0, 0}}, // POUND SIGN
{{'$', 0, 0, 0}}, // CURRENCY SIGN
{{'Y', 0, 0, 0}}, // YEN SIGN
{{'|', 0, 0, 0}}, // BROKEN BAR
{{0, 0, 0, 0}}, // SECTION SIGN
{{0, 0, 0, 0}}, // DIAERESIS
{{'(', 'C', ')', 0}}, // COPYRIGHT SIGN
{{'a', 0, 0, 0}}, // FEMININE ORDINAL INDICATOR
{{'<', '<', 0, 0}}, // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
{{0, 0, 0, 0}}, // NOT SIGN
{{'-', 0, 0, 0}}, // SOFT HYPHEN
{{'(', 'R', ')', 0}}, // REGISTERED SIGN
{{0, 0, 0, 0}}, // MACRON
{{0, 0, 0, 0}}, // DEGREE SIGN
{{'+', '-', 0, 0}}, // PLUS-MINUS SIGN
{{'2', 0, 0, 0}}, // SUPERSCRIPT TWO
{{'3', 0, 0, 0}}, // SUPERSCRIPT THREE
{{0, 0, 0, 0}}, // ACUTE ACCENT
{{0, 0, 0, 0}}, // MICRO SIGN
{{0, 0, 0, 0}}, // PILCROW SIGN
{{0, 0, 0, 0}}, // MIDDLE DOT
{{0, 0, 0, 0}}, // CEDILLA
{{'1', 0, 0, 0}}, // SUPERSCRIPT ONE
{{'o', 0, 0, 0}}, // MASCULINE ORDINAL INDICATOR
{{'>', '>', 0, 0}}, // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
{{'1', '/', '4', 0}}, // VULGAR FRACTION ONE QUARTER
{{'1', '/', '2', 0}}, // VULGAR FRACTION ONE HALF
{{'3', '/', '4', 0}}, // VULGAR FRACTION THREE QUARTERS
{{'?', 0, 0, 0}}, // INVERTED QUESTION MARK
{{'A', 0, 0, 0}}, // LATIN CAPITAL LETTER A WITH GRAVE
{{'A', 0, 0, 0}}, // LATIN CAPITAL LETTER A WITH ACUTE
{{'A', 0, 0, 0}}, // LATIN CAPITAL LETTER A WITH CIRCUMFLEX
{{'A', 0, 0, 0}}, // LATIN CAPITAL LETTER A WITH TILDE
{{'A', 0, 0, 0}}, // LATIN CAPITAL LETTER A WITH DIAERESIS
{{'A', 0, 0, 0}}, // LATIN CAPITAL LETTER A WITH RING ABOVE
{{'A', 'E', 0, 0}}, // LATIN CAPITAL LETTER AE
{{'C', 0, 0, 0}}, // LATIN CAPITAL LETTER C WITH CEDILLA
{{'E', 0, 0, 0}}, // LATIN CAPITAL LETTER E WITH GRAVE
{{'E', 0, 0, 0}}, // LATIN CAPITAL LETTER E WITH ACUTE
{{'E', 0, 0, 0}}, // LATIN CAPITAL LETTER E WITH CIRCUMFLEX
{{'E', 0, 0, 0}}, // LATIN CAPITAL LETTER E WITH DIAERESIS
{{'I', 0, 0, 0}}, // LATIN CAPITAL LETTER I WITH GRAVE
{{'I', 0, 0, 0}}, // LATIN CAPITAL LETTER I WITH ACUTE
{{'I', 0, 0, 0}}, // LATIN CAPITAL LETTER I WITH CIRCUMFLEX
{{'I', 0, 0, 0}}, // LATIN CAPITAL LETTER I WITH DIAERESIS
{{'T', 'H', 0, 0}}, // LATIN CAPITAL LETTER ETH (Icelandic)
{{'N', 0, 0, 0}}, // LATIN CAPITAL LETTER N WITH TILDE
{{'O', 0, 0, 0}}, // LATIN CAPITAL LETTER O WITH GRAVE
{{'O', 0, 0, 0}}, // LATIN CAPITAL LETTER O WITH ACUTE
{{'O', 0, 0, 0}}, // LATIN CAPITAL LETTER O WITH CIRCUMFLEX
{{'O', 0, 0, 0}}, // LATIN CAPITAL LETTER O WITH TILDE
{{'O', 0, 0, 0}}, // LATIN CAPITAL LETTER O WITH DIAERESIS
{{'X', 0, 0, 0}}, // MULTIPLICATION SIGN
{{'O', 0, 0, 0}}, // LATIN CAPITAL LETTER O WITH STROKE
{{'U', 0, 0, 0}}, // LATIN CAPITAL LETTER U WITH GRAVE
{{'U', 0, 0, 0}}, // LATIN CAPITAL LETTER U WITH ACUTE
{{'U', 0, 0, 0}}, // LATIN CAPITAL LETTER U WITH CIRCUMFLEX
{{'U', 0, 0, 0}}, // LATIN CAPITAL LETTER U WITH DIAERESIS
{{'Y', 0, 0, 0}}, // LATIN CAPITAL LETTER Y WITH ACUTE
{{'t', 'h', 0, 0}}, // LATIN CAPITAL LETTER THORN (Icelandic)
{{'s', 0, 0, 0}}, // LATIN SMALL LETTER SHARP S (German)
{{'a', 0, 0, 0}}, // LATIN SMALL LETTER A WITH GRAVE
{{'a', 0, 0, 0}}, // LATIN SMALL LETTER A WITH ACUTE
{{'a', 0, 0, 0}}, // LATIN SMALL LETTER A WITH CIRCUMFLEX
{{'a', 0, 0, 0}}, // LATIN SMALL LETTER A WITH TILDE
{{'a', 0, 0, 0}}, // LATIN SMALL LETTER A WITH DIAERESIS
{{'a', 0, 0, 0}}, // LATIN SMALL LETTER A WITH RING ABOVE
{{'a', 'e', 0, 0}}, // LATIN SMALL LETTER AE
{{'c', 0, 0, 0}}, // LATIN SMALL LETTER C WITH CEDILLA
{{'e', 0, 0, 0}}, // LATIN SMALL LETTER E WITH GRAVE
{{'e', 0, 0, 0}}, // LATIN SMALL LETTER E WITH ACUTE
{{'e', 0, 0, 0}}, // LATIN SMALL LETTER E WITH CIRCUMFLEX
{{'e', 0, 0, 0}}, // LATIN SMALL LETTER E WITH DIAERESIS
{{'i', 0, 0, 0}}, // LATIN SMALL LETTER I WITH GRAVE
{{'i', 0, 0, 0}}, // LATIN SMALL LETTER I WITH ACUTE
{{'i', 0, 0, 0}}, // LATIN SMALL LETTER I WITH CIRCUMFLEX
{{'i', 0, 0, 0}}, // LATIN SMALL LETTER I WITH DIAERESIS
{{'T', 'H', 0, 0}}, // LATIN SMALL LETTER ETH (Icelandic)
{{'n', 0, 0, 0}}, // LATIN SMALL LETTER N WITH TILDE
{{'o', 0, 0, 0}}, // LATIN SMALL LETTER O WITH GRAVE
{{'o', 0, 0, 0}}, // LATIN SMALL LETTER O WITH ACUTE
{{'o', 0, 0, 0}}, // LATIN SMALL LETTER O WITH CIRCUMFLEX
{{'o', 0, 0, 0}}, // LATIN SMALL LETTER O WITH TILDE
{{'o', 0, 0, 0}}, // LATIN SMALL LETTER O WITH DIAERESIS
{{'/', 0, 0, 0}}, // DIVISION SIGN
{{'o', 0, 0, 0}}, // LATIN SMALL LETTER O WITH STROKE
{{'u', 0, 0, 0}}, // LATIN SMALL LETTER U WITH GRAVE
{{'u', 0, 0, 0}}, // LATIN SMALL LETTER U WITH ACUTE
{{'u', 0, 0, 0}}, // LATIN SMALL LETTER U WITH CIRCUMFLEX
{{'u', 0, 0, 0}}, // LATIN SMALL LETTER U WITH DIAERESIS
{{'y', 0, 0, 0}}, // LATIN SMALL LETTER Y WITH ACUTE
{{'t', 'h', 0, 0}}, // LATIN SMALL LETTER THORN (Icelandic)
{{'y', 0, 0, 0}}, // LATIN SMALL LETTER Y WITH DIAERESIS
};
CF_INLINE CFIndex __CFToASCIILatin1Fallback(UniChar character, uint8_t *bytes, CFIndex maxByteLen) {
const uint8_t *losChars = (const uint8_t*)_toLossyASCIITable + (character - 0xA0) * sizeof(uint8_t[4]);
CFIndex numBytes = 0;
CFIndex idx, max = (maxByteLen && (maxByteLen < 4) ? maxByteLen : 4);
for (idx = 0;idx < max;idx++) {
if (losChars[idx]) {
if (maxByteLen) bytes[idx] = losChars[idx];
++numBytes;
} else {
break;
}
}
return numBytes;
}
static CFIndex __CFDefaultToBytesFallbackProc(const UniChar *characters, CFIndex numChars, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen) {
CFIndex processCharLen = 1, filledBytesLen = 1;
uint8_t byte = '?';
if (*characters < 0xA0) { // 0x80 to 0x9F maps to ASCII C0 range
byte = (uint8_t)(*characters - 0x80);
} else if (*characters < 0x100) {
*usedByteLen = __CFToASCIILatin1Fallback(*characters, bytes, maxByteLen);
return 1;
} else if (*characters >= kSurrogateHighStart && *characters <= kSurrogateLowEnd) {
processCharLen = (numChars > 1 && *characters <= kSurrogateLowStart && *(characters + 1) >= kSurrogateLowStart && *(characters + 1) <= kSurrogateLowEnd ? 2 : 1);
} else if (CFUniCharIsMemberOf(*characters, kCFUniCharWhitespaceCharacterSet)) {
byte = ' ';
} else if (CFUniCharIsMemberOf(*characters, kCFUniCharWhitespaceAndNewlineCharacterSet)) {
byte = ASCIINewLine;
} else if (*characters == 0x2026) { // ellipsis
if (0 == maxByteLen) {
filledBytesLen = 3;
} else if (maxByteLen > 2) {
memset(bytes, '.', 3);
*usedByteLen = 3;
return processCharLen;
}
} else if (CFUniCharIsMemberOf(*characters, kCFUniCharDecomposableCharacterSet)) {
UTF32Char decomposed[MAX_DECOMPOSED_LENGTH];
(void)CFUniCharDecomposeCharacter(*characters, decomposed, MAX_DECOMPOSED_LENGTH);
if (*decomposed < 0x80) {
byte = (uint8_t)(*decomposed);
} else {
UTF16Char theChar = *decomposed;
return __CFDefaultToBytesFallbackProc(&theChar, 1, bytes, maxByteLen, usedByteLen);
}
}
if (maxByteLen) *bytes = byte;
*usedByteLen = filledBytesLen;
return processCharLen;
}
static CFIndex __CFDefaultToUnicodeFallbackProc(const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
if (maxCharLen) *characters = (UniChar)'?';
*usedCharLen = 1;
return 1;
}
#define TO_BYTE_FALLBACK(conv,chars,numChars,bytes,max,used) (conv->toBytesFallback(chars,numChars,bytes,max,used))
#define TO_UNICODE_FALLBACK(conv,bytes,numBytes,chars,max,used) (conv->toUnicodeFallback(bytes,numBytes,chars,max,used))
#define EXTRA_BASE (0x0F00)
/* Wrapper funcs for non-standard converters
*/
static CFIndex __CFToBytesCheapEightBitWrapper(const void *converter, uint32_t flags, const UniChar *characters, CFIndex numChars, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen) {
CFIndex processedCharLen = 0;
CFIndex length = (maxByteLen && (maxByteLen < numChars) ? maxByteLen : numChars);
uint8_t byte;
while (processedCharLen < length) {
if (!((CFStringEncodingCheapEightBitToBytesProc)((const _CFEncodingConverter*)converter)->definition->toBytes)(flags, characters[processedCharLen], &byte)) break;
if (maxByteLen) bytes[processedCharLen] = byte;
processedCharLen++;
}
*usedByteLen = processedCharLen;
return processedCharLen;
}
static CFIndex __CFToUnicodeCheapEightBitWrapper(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
CFIndex processedByteLen = 0;
CFIndex length = (maxCharLen && (maxCharLen < numBytes) ? maxCharLen : numBytes);
UniChar character;
while (processedByteLen < length) {
if (!((CFStringEncodingCheapEightBitToUnicodeProc)((const _CFEncodingConverter*)converter)->definition->toUnicode)(flags, bytes[processedByteLen], &character)) break;
if (maxCharLen) characters[processedByteLen] = character;
processedByteLen++;
}
*usedCharLen = processedByteLen;
return processedByteLen;
}
static CFIndex __CFToCanonicalUnicodeCheapEightBitWrapper(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
CFIndex processedByteLen = 0;
CFIndex theUsedCharLen = 0;
UTF32Char charBuffer[MAX_DECOMPOSED_LENGTH];
CFIndex usedLen;
UniChar character;
bool isHFSPlus = (flags & kCFStringEncodingUseHFSPlusCanonical ? true : false);
while ((processedByteLen < numBytes) && (!maxCharLen || (theUsedCharLen < maxCharLen))) {
if (!((CFStringEncodingCheapEightBitToUnicodeProc)((const _CFEncodingConverter*)converter)->definition->toUnicode)(flags, bytes[processedByteLen], &character)) break;
if (CFUniCharIsDecomposableCharacter(character, isHFSPlus)) {
CFIndex idx;
usedLen = CFUniCharDecomposeCharacter(character, charBuffer, MAX_DECOMPOSED_LENGTH);
*usedCharLen = theUsedCharLen;
for (idx = 0;idx < usedLen;idx++) {
if (charBuffer[idx] > 0xFFFF) { // Non-BMP
if (theUsedCharLen + 2 > maxCharLen) return processedByteLen;
theUsedCharLen += 2;
if (maxCharLen) {
charBuffer[idx] = charBuffer[idx] - 0x10000;
*(characters++) = (UniChar)(charBuffer[idx] >> 10) + 0xD800UL;
*(characters++) = (UniChar)(charBuffer[idx] & 0x3FF) + 0xDC00UL;
}
} else {
if (theUsedCharLen + 1 > maxCharLen) return processedByteLen;
++theUsedCharLen;
*(characters++) = charBuffer[idx];
}
}
} else {
if (maxCharLen) *(characters++) = character;
++theUsedCharLen;
}
processedByteLen++;
}
*usedCharLen = theUsedCharLen;
return processedByteLen;
}
static CFIndex __CFToBytesStandardEightBitWrapper(const void *converter, uint32_t flags, const UniChar *characters, CFIndex numChars, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen) {
CFIndex processedCharLen = 0;
uint8_t byte;
CFIndex usedLen;
*usedByteLen = 0;
while (numChars && (!maxByteLen || (*usedByteLen < maxByteLen))) {
if (!(usedLen = ((CFStringEncodingStandardEightBitToBytesProc)((const _CFEncodingConverter*)converter)->definition->toBytes)(flags, characters, numChars, &byte))) break;
if (maxByteLen) bytes[*usedByteLen] = byte;
(*usedByteLen)++;
characters += usedLen;
numChars -= usedLen;
processedCharLen += usedLen;
}
return processedCharLen;
}
static CFIndex __CFToUnicodeStandardEightBitWrapper(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
CFIndex processedByteLen = 0;
UniChar charBuffer[__CFMaximumConvertedLength];
CFIndex usedLen;
*usedCharLen = 0;
while ((processedByteLen < numBytes) && (!maxCharLen || (*usedCharLen < maxCharLen))) {
if (!(usedLen = ((CFStringEncodingCheapEightBitToUnicodeProc)((const _CFEncodingConverter*)converter)->definition->toUnicode)(flags, bytes[processedByteLen], charBuffer))) break;
if (maxCharLen) {
CFIndex idx;
if (*usedCharLen + usedLen > maxCharLen) break;
for (idx = 0;idx < usedLen;idx++) {
characters[*usedCharLen + idx] = charBuffer[idx];
}
}
*usedCharLen += usedLen;
processedByteLen++;
}
return processedByteLen;
}
static CFIndex __CFToCanonicalUnicodeStandardEightBitWrapper(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
CFIndex processedByteLen = 0;
UniChar charBuffer[__CFMaximumConvertedLength];
UTF32Char decompBuffer[MAX_DECOMPOSED_LENGTH];
CFIndex usedLen;
CFIndex decompedLen;
CFIndex idx, decompIndex;
bool isHFSPlus = (flags & kCFStringEncodingUseHFSPlusCanonical ? true : false);
CFIndex theUsedCharLen = 0;
while ((processedByteLen < numBytes) && (!maxCharLen || (theUsedCharLen < maxCharLen))) {
if (!(usedLen = ((CFStringEncodingCheapEightBitToUnicodeProc)((const _CFEncodingConverter*)converter)->definition->toUnicode)(flags, bytes[processedByteLen], charBuffer))) break;
for (idx = 0;idx < usedLen;idx++) {
if (CFUniCharIsDecomposableCharacter(charBuffer[idx], isHFSPlus)) {
decompedLen = CFUniCharDecomposeCharacter(charBuffer[idx], decompBuffer, MAX_DECOMPOSED_LENGTH);
*usedCharLen = theUsedCharLen;
for (decompIndex = 0;decompIndex < decompedLen;decompIndex++) {
if (decompBuffer[decompIndex] > 0xFFFF) { // Non-BMP
if (theUsedCharLen + 2 > maxCharLen) return processedByteLen;
theUsedCharLen += 2;
if (maxCharLen) {
charBuffer[idx] = charBuffer[idx] - 0x10000;
*(characters++) = (charBuffer[idx] >> 10) + 0xD800UL;
*(characters++) = (charBuffer[idx] & 0x3FF) + 0xDC00UL;
}
} else {
if (theUsedCharLen + 1 > maxCharLen) return processedByteLen;
++theUsedCharLen;
*(characters++) = charBuffer[idx];
}
}
} else {
if (maxCharLen) *(characters++) = charBuffer[idx];
++theUsedCharLen;
}
}
processedByteLen++;
}
*usedCharLen = theUsedCharLen;
return processedByteLen;
}
static CFIndex __CFToBytesCheapMultiByteWrapper(const void *converter, uint32_t flags, const UniChar *characters, CFIndex numChars, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen) {
CFIndex processedCharLen = 0;
uint8_t byteBuffer[__CFMaximumConvertedLength];
CFIndex usedLen;
*usedByteLen = 0;
while ((processedCharLen < numChars) && (!maxByteLen || (*usedByteLen < maxByteLen))) {
if (!(usedLen = ((CFStringEncodingCheapMultiByteToBytesProc)((const _CFEncodingConverter*)converter)->definition->toBytes)(flags, characters[processedCharLen], byteBuffer))) break;
if (maxByteLen) {
CFIndex idx;
if (*usedByteLen + usedLen > maxByteLen) break;
for (idx = 0;idx <usedLen;idx++) {
bytes[*usedByteLen + idx] = byteBuffer[idx];
}
}
*usedByteLen += usedLen;
processedCharLen++;
}
return processedCharLen;
}
static CFIndex __CFToUnicodeCheapMultiByteWrapper(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
CFIndex processedByteLen = 0;
UniChar character;
CFIndex usedLen;
*usedCharLen = 0;
while (numBytes && (!maxCharLen || (*usedCharLen < maxCharLen))) {
if (!(usedLen = ((CFStringEncodingCheapMultiByteToUnicodeProc)((const _CFEncodingConverter*)converter)->definition->toUnicode)(flags, bytes, numBytes, &character))) break;
if (maxCharLen) *(characters++) = character;
(*usedCharLen)++;
processedByteLen += usedLen;
bytes += usedLen;
numBytes -= usedLen;
}
return processedByteLen;
}
static CFIndex __CFToCanonicalUnicodeCheapMultiByteWrapper(const void *converter, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
CFIndex processedByteLen = 0;
UTF32Char charBuffer[MAX_DECOMPOSED_LENGTH];
UniChar character;
CFIndex usedLen;
CFIndex decomposedLen;
CFIndex theUsedCharLen = 0;
bool isHFSPlus = (flags & kCFStringEncodingUseHFSPlusCanonical ? true : false);
while (numBytes && (!maxCharLen || (theUsedCharLen < maxCharLen))) {
if (!(usedLen = ((CFStringEncodingCheapMultiByteToUnicodeProc)((const _CFEncodingConverter*)converter)->definition->toUnicode)(flags, bytes, numBytes, &character))) break;
if (CFUniCharIsDecomposableCharacter(character, isHFSPlus)) {
CFIndex idx;
decomposedLen = CFUniCharDecomposeCharacter(character, charBuffer, MAX_DECOMPOSED_LENGTH);
*usedCharLen = theUsedCharLen;
for (idx = 0;idx < decomposedLen;idx++) {
if (charBuffer[idx] > 0xFFFF) { // Non-BMP
if (theUsedCharLen + 2 > maxCharLen) return processedByteLen;
theUsedCharLen += 2;
if (maxCharLen) {
charBuffer[idx] = charBuffer[idx] - 0x10000;
*(characters++) = (UniChar)(charBuffer[idx] >> 10) + 0xD800UL;
*(characters++) = (UniChar)(charBuffer[idx] & 0x3FF) + 0xDC00UL;
}
} else {
if (theUsedCharLen + 1 > maxCharLen) return processedByteLen;
++theUsedCharLen;
*(characters++) = charBuffer[idx];
}
}
} else {
if (maxCharLen) *(characters++) = character;
++theUsedCharLen;
}
processedByteLen += usedLen;
bytes += usedLen;
numBytes -= usedLen;
}
*usedCharLen = theUsedCharLen;
return processedByteLen;
}
/* static functions
*/
CF_INLINE _CFEncodingConverter *__CFEncodingConverterFromDefinition(const CFStringEncodingConverter *definition, CFStringEncoding encoding) {
#define NUM_OF_ENTRIES_CYCLE (10)
static uint32_t _currentIndex = 0;
static uint32_t _allocatedSize = 0;
static _CFEncodingConverter *_allocatedEntries = NULL;
_CFEncodingConverter *converter;
if ((_currentIndex + 1) >= _allocatedSize) {
_currentIndex = 0;
_allocatedSize = 0;
_allocatedEntries = NULL;
}
if (_allocatedEntries == NULL) { // Not allocated yet
_allocatedEntries = (_CFEncodingConverter *)CFAllocatorAllocate(kCFAllocatorSystemDefault, sizeof(_CFEncodingConverter) * NUM_OF_ENTRIES_CYCLE, 0);
_allocatedSize = NUM_OF_ENTRIES_CYCLE;
converter = &(_allocatedEntries[_currentIndex]);
} else {
converter = &(_allocatedEntries[++_currentIndex]);
}
memset(converter, 0, sizeof(_CFEncodingConverter));
converter->definition = definition;
switch (definition->encodingClass) {
case kCFStringEncodingConverterStandard:
converter->toBytes = NULL;
converter->toUnicode = NULL;
converter->toCanonicalUnicode = NULL;
break;
case kCFStringEncodingConverterCheapEightBit:
converter->toBytes = __CFToBytesCheapEightBitWrapper;
converter->toUnicode = __CFToUnicodeCheapEightBitWrapper;
converter->toCanonicalUnicode = __CFToCanonicalUnicodeCheapEightBitWrapper;
break;
case kCFStringEncodingConverterStandardEightBit:
converter->toBytes = __CFToBytesStandardEightBitWrapper;
converter->toUnicode = __CFToUnicodeStandardEightBitWrapper;
converter->toCanonicalUnicode = __CFToCanonicalUnicodeStandardEightBitWrapper;
break;
case kCFStringEncodingConverterCheapMultiByte:
converter->toBytes = __CFToBytesCheapMultiByteWrapper;
converter->toUnicode = __CFToUnicodeCheapMultiByteWrapper;
converter->toCanonicalUnicode = __CFToCanonicalUnicodeCheapMultiByteWrapper;
break;
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
case kCFStringEncodingConverterICU:
converter->toBytes = (_CFToBytesProc)__CFStringEncodingGetICUName(encoding);
break;
#endif
case kCFStringEncodingConverterPlatformSpecific:
break;
default: // Shouln't be here
return NULL;
}
converter->toBytesFallback = (definition->toBytesFallback ? definition->toBytesFallback : __CFDefaultToBytesFallbackProc);
converter->toUnicodeFallback = (definition->toUnicodeFallback ? definition->toUnicodeFallback : __CFDefaultToUnicodeFallbackProc);
return converter;
}
CF_INLINE const CFStringEncodingConverter *__CFStringEncodingConverterGetDefinition(CFStringEncoding encoding) {
switch (encoding) {
case kCFStringEncodingUTF8:
return &__CFConverterUTF8;
case kCFStringEncodingMacRoman:
return &__CFConverterMacRoman;
case kCFStringEncodingWindowsLatin1:
return &__CFConverterWinLatin1;
case kCFStringEncodingASCII:
return &__CFConverterASCII;
case kCFStringEncodingISOLatin1:
return &__CFConverterISOLatin1;
case kCFStringEncodingNextStepLatin:
return &__CFConverterNextStepLatin;
default:
return __CFStringEncodingGetExternalConverter(encoding);
}
}
static const _CFEncodingConverter *__CFGetConverter(uint32_t encoding) {
const _CFEncodingConverter *converter = NULL;
const _CFEncodingConverter **commonConverterSlot = NULL;
static _CFEncodingConverter *commonConverters[3] = {NULL, NULL, NULL}; // UTF8, MacRoman/WinLatin1, and the default encoding*
static CFMutableDictionaryRef mappingTable = NULL;
static OSSpinLock lock = OS_SPINLOCK_INIT;
switch (encoding) {
case kCFStringEncodingUTF8: commonConverterSlot = (const _CFEncodingConverter **)&(commonConverters[0]); break;
/* the swith here should avoid possible bootstrap issues in the default: case below when invoked from CFStringGetSystemEncoding() */
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI || DEPLOYMENT_TARGET_LINUX
case kCFStringEncodingMacRoman: commonConverterSlot = (const _CFEncodingConverter **)&(commonConverters[1]); break;
#elif DEPLOYMENT_TARGET_WINDOWS
case kCFStringEncodingWindowsLatin1: commonConverterSlot = (const _CFEncodingConverter **)(&(commonConverters[1])); break;
#else
#warning This case must match __defaultEncoding value defined in CFString.c
case kCFStringEncodingISOLatin1: commonConverterSlot = (const _CFEncodingConverter **)(&(commonConverters[1])); break;
#endif
default: if (CFStringGetSystemEncoding() == encoding) commonConverterSlot = (const _CFEncodingConverter **)&(commonConverters[2]); break;
}
OSSpinLockLock(&lock);
converter = ((NULL == commonConverterSlot) ? ((NULL == mappingTable) ? NULL : (const _CFEncodingConverter *)CFDictionaryGetValue(mappingTable, (const void *)(uintptr_t)encoding)) : *commonConverterSlot);
OSSpinLockUnlock(&lock);
if (NULL == converter) {
const CFStringEncodingConverter *definition = __CFStringEncodingConverterGetDefinition(encoding);
if (NULL != definition) {
OSSpinLockLock(&lock);
converter = ((NULL == commonConverterSlot) ? ((NULL == mappingTable) ? NULL : (const _CFEncodingConverter *)CFDictionaryGetValue(mappingTable, (const void *)(uintptr_t)encoding)) : *commonConverterSlot);
if (NULL == converter) {
converter = __CFEncodingConverterFromDefinition(definition, encoding);
if (NULL == commonConverterSlot) {
if (NULL == mappingTable) mappingTable = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
CFDictionarySetValue(mappingTable, (const void *)(uintptr_t)encoding, converter);
} else {
*commonConverterSlot = converter;
}
}
OSSpinLockUnlock(&lock);
}
}
return converter;
}
/* Public API
*/
uint32_t CFStringEncodingUnicodeToBytes(uint32_t encoding, uint32_t flags, const UniChar *characters, CFIndex numChars, CFIndex *usedCharLen, uint8_t *bytes, CFIndex maxByteLen, CFIndex *usedByteLen) {
if (encoding == kCFStringEncodingUTF8) {
static CFStringEncodingToBytesProc __CFToUTF8 = NULL;
CFIndex convertedCharLen;
CFIndex usedLen;
if ((flags & kCFStringEncodingUseCanonical) || (flags & kCFStringEncodingUseHFSPlusCanonical)) {
(void)CFUniCharDecompose(characters, numChars, &convertedCharLen, (void *)bytes, maxByteLen, &usedLen, true, kCFUniCharUTF8Format, (flags & kCFStringEncodingUseHFSPlusCanonical ? true : false));
} else {
if (!__CFToUTF8) {
const CFStringEncodingConverter *utf8Converter = CFStringEncodingGetConverter(kCFStringEncodingUTF8);
__CFToUTF8 = (CFStringEncodingToBytesProc)utf8Converter->toBytes;
}
convertedCharLen = __CFToUTF8(0, characters, numChars, bytes, maxByteLen, &usedLen);
}
if (usedCharLen) *usedCharLen = convertedCharLen;
if (usedByteLen) *usedByteLen = usedLen;
if (convertedCharLen == numChars) {
return kCFStringEncodingConversionSuccess;
} else if ((maxByteLen > 0) && ((maxByteLen - usedLen) < 10)) { // could be filled outbuf
UTF16Char character = characters[convertedCharLen];
if (((character >= kSurrogateLowStart) && (character <= kSurrogateLowEnd)) || ((character >= kSurrogateHighStart) && (character <= kSurrogateHighEnd) && ((1 == (numChars - convertedCharLen)) || (characters[convertedCharLen + 1] < kSurrogateLowStart) || (characters[convertedCharLen + 1] > kSurrogateLowEnd)))) return kCFStringEncodingInvalidInputStream;
return kCFStringEncodingInsufficientOutputBufferLength;
} else {
return kCFStringEncodingInvalidInputStream;
}
} else {
const _CFEncodingConverter *converter = __CFGetConverter(encoding);
CFIndex usedLen = 0;
CFIndex localUsedByteLen;
CFIndex theUsedByteLen = 0;
uint32_t theResult = kCFStringEncodingConversionSuccess;
CFStringEncodingToBytesPrecomposeProc toBytesPrecompose = NULL;
CFStringEncodingIsValidCombiningCharacterProc isValidCombiningChar = NULL;
if (!converter) return kCFStringEncodingConverterUnavailable;
if (flags & kCFStringEncodingSubstituteCombinings) {
if (!(flags & kCFStringEncodingAllowLossyConversion)) isValidCombiningChar = converter->definition->isValidCombiningChar;
} else {
isValidCombiningChar = converter->definition->isValidCombiningChar;
if (!(flags & kCFStringEncodingIgnoreCombinings)) {
toBytesPrecompose = converter->definition->toBytesPrecompose;
flags |= kCFStringEncodingComposeCombinings;
}
}
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
if (kCFStringEncodingConverterICU == converter->definition->encodingClass) return __CFStringEncodingICUToBytes((const char *)converter->toBytes, flags, characters, numChars, usedCharLen, bytes, maxByteLen, usedByteLen);
#endif
/* Platform converter */
if (kCFStringEncodingConverterPlatformSpecific == converter->definition->encodingClass) return __CFStringEncodingPlatformUnicodeToBytes(encoding, flags, characters, numChars, usedCharLen, bytes, maxByteLen, usedByteLen);
while ((usedLen < numChars) && (!maxByteLen || (theUsedByteLen < maxByteLen))) {
if ((usedLen += TO_BYTE(converter, flags, characters + usedLen, numChars - usedLen, bytes + theUsedByteLen, (maxByteLen ? maxByteLen - theUsedByteLen : 0), &localUsedByteLen)) < numChars) {
CFIndex dummy;
if (isValidCombiningChar && (usedLen > 0) && isValidCombiningChar(characters[usedLen])) {
if (toBytesPrecompose) {
CFIndex localUsedLen = usedLen;
while (isValidCombiningChar(characters[--usedLen]));
theUsedByteLen += localUsedByteLen;
if (converter->definition->maxBytesPerChar > 1) {
TO_BYTE(converter, flags, characters + usedLen, localUsedLen - usedLen, NULL, 0, &localUsedByteLen);
theUsedByteLen -= localUsedByteLen;
} else {
theUsedByteLen--;
}
if ((localUsedLen = toBytesPrecompose(flags, characters + usedLen, numChars - usedLen, bytes + theUsedByteLen, (maxByteLen ? maxByteLen - theUsedByteLen : 0), &localUsedByteLen)) > 0) {
usedLen += localUsedLen;
if ((usedLen < numChars) && isValidCombiningChar(characters[usedLen])) { // There is a non-base char not combined remaining
theUsedByteLen += localUsedByteLen;
theResult = kCFStringEncodingInvalidInputStream;
break;
}
} else if (flags & kCFStringEncodingAllowLossyConversion) {
uint8_t lossyByte = CFStringEncodingMaskToLossyByte(flags);
if (lossyByte) {
while (isValidCombiningChar(characters[++usedLen]));
localUsedByteLen = 1;
if (maxByteLen) *(bytes + theUsedByteLen) = lossyByte;
} else {
++usedLen;
usedLen += TO_BYTE_FALLBACK(converter, characters + usedLen, numChars - usedLen, bytes + theUsedByteLen, (maxByteLen ? maxByteLen - theUsedByteLen : 0), &localUsedByteLen);
}
} else {
theResult = kCFStringEncodingInvalidInputStream;
break;
}
} else if (maxByteLen && ((maxByteLen == theUsedByteLen + localUsedByteLen) || TO_BYTE(converter, flags, characters + usedLen, numChars - usedLen, NULL, 0, &dummy))) { // buffer was filled up
theUsedByteLen += localUsedByteLen;
theResult = kCFStringEncodingInsufficientOutputBufferLength;
break;
} else if (flags & kCFStringEncodingIgnoreCombinings) {
while ((++usedLen < numChars) && isValidCombiningChar(characters[usedLen]));
} else {
uint8_t lossyByte = CFStringEncodingMaskToLossyByte(flags);
theUsedByteLen += localUsedByteLen;
if (lossyByte) {
++usedLen;
localUsedByteLen = 1;
if (maxByteLen) *(bytes + theUsedByteLen) = lossyByte;
} else {
usedLen += TO_BYTE_FALLBACK(converter, characters + usedLen, numChars - usedLen, bytes + theUsedByteLen, (maxByteLen ? maxByteLen - theUsedByteLen : 0), &localUsedByteLen);
}
}
} else if (maxByteLen && ((maxByteLen == theUsedByteLen + localUsedByteLen) || TO_BYTE(converter, flags, characters + usedLen, numChars - usedLen, NULL, 0, &dummy))) { // buffer was filled up
theUsedByteLen += localUsedByteLen;
if (flags & kCFStringEncodingAllowLossyConversion && !CFStringEncodingMaskToLossyByte(flags)) {
CFIndex localUsedLen;
localUsedByteLen = 0;
// after the buffer is full, we still try out all the rest of the characters
// if all characters cannot be converted, we mark the result as insufficient output buffer
while ((usedLen < numChars) && !localUsedByteLen && (localUsedLen = TO_BYTE_FALLBACK(converter, characters + usedLen, numChars - usedLen, NULL, 0, &localUsedByteLen))) {
if (localUsedByteLen == 0) {
usedLen += localUsedLen;
}
}
}
if (usedLen < numChars) theResult = kCFStringEncodingInsufficientOutputBufferLength;
break;
} else if (flags & kCFStringEncodingAllowLossyConversion) {
uint8_t lossyByte = CFStringEncodingMaskToLossyByte(flags);
theUsedByteLen += localUsedByteLen;
if (lossyByte) {
++usedLen;
localUsedByteLen = 1;
if (maxByteLen) *(bytes + theUsedByteLen) = lossyByte;
} else {
usedLen += TO_BYTE_FALLBACK(converter, characters + usedLen, numChars - usedLen, bytes + theUsedByteLen, (maxByteLen ? maxByteLen - theUsedByteLen : 0), &localUsedByteLen);
}
} else {
theUsedByteLen += localUsedByteLen;
theResult = kCFStringEncodingInvalidInputStream;
break;
}
}
theUsedByteLen += localUsedByteLen;
}
if (usedLen < numChars && maxByteLen && theResult == kCFStringEncodingConversionSuccess) {
if (flags & kCFStringEncodingAllowLossyConversion && !CFStringEncodingMaskToLossyByte(flags)) {
CFIndex localUsedLen;
localUsedByteLen = 0;
while ((usedLen < numChars) && !localUsedByteLen && (localUsedLen = TO_BYTE_FALLBACK(converter, characters + usedLen, numChars - usedLen, NULL, 0, &localUsedByteLen))) {
if (!localUsedByteLen) {
usedLen += localUsedLen;
}
}
}
if (usedLen < numChars) theResult = kCFStringEncodingInsufficientOutputBufferLength;
}
if (usedByteLen) *usedByteLen = theUsedByteLen;
if (usedCharLen) *usedCharLen = usedLen;
return theResult;
}
}
uint32_t CFStringEncodingBytesToUnicode(uint32_t encoding, uint32_t flags, const uint8_t *bytes, CFIndex numBytes, CFIndex *usedByteLen, UniChar *characters, CFIndex maxCharLen, CFIndex *usedCharLen) {
const _CFEncodingConverter *converter = __CFGetConverter(encoding);
CFIndex usedLen = 0;
CFIndex theUsedCharLen = 0;
CFIndex localUsedCharLen;
uint32_t theResult = kCFStringEncodingConversionSuccess;
if (!converter) return kCFStringEncodingConverterUnavailable;
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
if (kCFStringEncodingConverterICU == converter->definition->encodingClass) return __CFStringEncodingICUToUnicode((const char *)converter->toBytes, flags, bytes, numBytes, usedByteLen, characters, maxCharLen, usedCharLen);
#endif
/* Platform converter */
if (kCFStringEncodingConverterPlatformSpecific == converter->definition->encodingClass) return __CFStringEncodingPlatformBytesToUnicode(encoding, flags, bytes, numBytes, usedByteLen, characters, maxCharLen, usedCharLen);
while ((usedLen < numBytes) && (!maxCharLen || (theUsedCharLen < maxCharLen))) {
if ((usedLen += TO_UNICODE(converter, flags, bytes + usedLen, numBytes - usedLen, characters + theUsedCharLen, (maxCharLen ? maxCharLen - theUsedCharLen : 0), &localUsedCharLen)) < numBytes) {
CFIndex tempUsedCharLen;
if (maxCharLen && ((maxCharLen == theUsedCharLen + localUsedCharLen) || (((flags & (kCFStringEncodingUseCanonical|kCFStringEncodingUseHFSPlusCanonical)) || (maxCharLen == theUsedCharLen + localUsedCharLen + 1)) && TO_UNICODE(converter, flags, bytes + usedLen, numBytes - usedLen, NULL, 0, &tempUsedCharLen)))) { // buffer was filled up
theUsedCharLen += localUsedCharLen;
theResult = kCFStringEncodingInsufficientOutputBufferLength;
break;
} else if (flags & kCFStringEncodingAllowLossyConversion) {
theUsedCharLen += localUsedCharLen;
usedLen += TO_UNICODE_FALLBACK(converter, bytes + usedLen, numBytes - usedLen, characters + theUsedCharLen, (maxCharLen ? maxCharLen - theUsedCharLen : 0), &localUsedCharLen);
} else {
theUsedCharLen += localUsedCharLen;
theResult = kCFStringEncodingInvalidInputStream;
break;
}
}
theUsedCharLen += localUsedCharLen;
}
if (usedLen < numBytes && maxCharLen && theResult == kCFStringEncodingConversionSuccess) {
theResult = kCFStringEncodingInsufficientOutputBufferLength;
}
if (usedCharLen) *usedCharLen = theUsedCharLen;
if (usedByteLen) *usedByteLen = usedLen;
return theResult;
}
CF_PRIVATE bool CFStringEncodingIsValidEncoding(uint32_t encoding) {
return (CFStringEncodingGetConverter(encoding) ? true : false);
}
CF_PRIVATE CFIndex CFStringEncodingCharLengthForBytes(uint32_t encoding, uint32_t flags, const uint8_t *bytes, CFIndex numBytes) {
const _CFEncodingConverter *converter = __CFGetConverter(encoding);
if (converter) {
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
if (kCFStringEncodingConverterICU == converter->definition->encodingClass) return __CFStringEncodingICUCharLength((const char *)converter->toBytes, flags, bytes, numBytes);
#endif
if (kCFStringEncodingConverterPlatformSpecific == converter->definition->encodingClass) return __CFStringEncodingPlatformCharLengthForBytes(encoding, flags, bytes, numBytes);
if (1 == converter->definition->maxBytesPerChar) return numBytes;
if (NULL == converter->definition->toUnicodeLen) {
CFIndex usedByteLen = 0;
CFIndex totalLength = 0;
CFIndex usedCharLen;
while (numBytes > 0) {
usedByteLen = TO_UNICODE(converter, flags, bytes, numBytes, NULL, 0, &usedCharLen);
bytes += usedByteLen;
numBytes -= usedByteLen;
totalLength += usedCharLen;
if (numBytes > 0) {
if (0 == (flags & kCFStringEncodingAllowLossyConversion)) return 0;
usedByteLen = TO_UNICODE_FALLBACK(converter, bytes, numBytes, NULL, 0, &usedCharLen);
bytes += usedByteLen;
numBytes -= usedByteLen;
totalLength += usedCharLen;
}
}
return totalLength;
} else {
return converter->definition->toUnicodeLen(flags, bytes, numBytes);
}
}
return 0;
}
CF_PRIVATE CFIndex CFStringEncodingByteLengthForCharacters(uint32_t encoding, uint32_t flags, const UniChar *characters, CFIndex numChars) {
const _CFEncodingConverter *converter = __CFGetConverter(encoding);
if (converter) {
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
if (kCFStringEncodingConverterICU == converter->definition->encodingClass) return __CFStringEncodingICUByteLength((const char *)converter->toBytes, flags, characters, numChars);
#endif
if (kCFStringEncodingConverterPlatformSpecific == converter->definition->encodingClass) return __CFStringEncodingPlatformByteLengthForCharacters(encoding, flags, characters, numChars);
if (1 == converter->definition->maxBytesPerChar) return numChars;
if (NULL == converter->definition->toBytesLen) {
CFIndex usedByteLen;
return ((kCFStringEncodingConversionSuccess == CFStringEncodingUnicodeToBytes(encoding, flags, characters, numChars, NULL, NULL, 0, &usedByteLen)) ? usedByteLen : 0);
} else {
return converter->definition->toBytesLen(flags, characters, numChars);
}
}
return 0;
}
void CFStringEncodingRegisterFallbackProcedures(uint32_t encoding, CFStringEncodingToBytesFallbackProc toBytes, CFStringEncodingToUnicodeFallbackProc toUnicode) {
_CFEncodingConverter *converter = (_CFEncodingConverter *)__CFGetConverter(encoding);
if (NULL != converter) {
const CFStringEncodingConverter *body = CFStringEncodingGetConverter(encoding);
converter->toBytesFallback = ((NULL == toBytes) ? ((NULL == body) ? __CFDefaultToBytesFallbackProc : body->toBytesFallback) : toBytes);
converter->toUnicodeFallback = ((NULL == toUnicode) ? ((NULL == body) ? __CFDefaultToUnicodeFallbackProc : body->toUnicodeFallback) : toUnicode);
}
}
CF_PRIVATE const CFStringEncodingConverter *CFStringEncodingGetConverter(uint32_t encoding) {
const _CFEncodingConverter *converter = __CFGetConverter(encoding);
return ((NULL == converter) ? NULL : converter->definition);
}
static const CFStringEncoding __CFBuiltinEncodings[] = {
kCFStringEncodingMacRoman,
kCFStringEncodingWindowsLatin1,
kCFStringEncodingISOLatin1,
kCFStringEncodingNextStepLatin,
kCFStringEncodingASCII,
kCFStringEncodingUTF8,
/* These seven are available only in CFString-level */
kCFStringEncodingNonLossyASCII,
kCFStringEncodingUTF16,
kCFStringEncodingUTF16BE,
kCFStringEncodingUTF16LE,
kCFStringEncodingUTF32,
kCFStringEncodingUTF32BE,
kCFStringEncodingUTF32LE,
kCFStringEncodingInvalidId,
};
static CFComparisonResult __CFStringEncodingComparator(const void *v1, const void *v2, void *context) {
CFComparisonResult val1 = (*(const CFStringEncoding *)v1) & 0xFFFF;
CFComparisonResult val2 = (*(const CFStringEncoding *)v2) & 0xFFFF;
return ((val1 == val2) ? ((CFComparisonResult)(*(const CFStringEncoding *)v1) - (CFComparisonResult)(*(const CFStringEncoding *)v2)) : val1 - val2);
}
static void __CFStringEncodingFliterDupes(CFStringEncoding *encodings, CFIndex numSlots) {
CFStringEncoding last = kCFStringEncodingInvalidId;
const CFStringEncoding *limitEncodings = encodings + numSlots;
while (encodings < limitEncodings) {
if (last == *encodings) {
if ((encodings + 1) < limitEncodings) memmove(encodings, encodings + 1, sizeof(CFStringEncoding) * (limitEncodings - encodings - 1));
--limitEncodings;
} else {
last = *(encodings++);
}
}
}
CF_PRIVATE const CFStringEncoding *CFStringEncodingListOfAvailableEncodings(void) {
static const CFStringEncoding *encodings = NULL;
if (NULL == encodings) {
CFStringEncoding *list = (CFStringEncoding *)__CFBuiltinEncodings;
CFIndex numICUConverters = 0, numPlatformConverters = 0;
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
CFStringEncoding *icuConverters = __CFStringEncodingCreateICUEncodings(NULL, &numICUConverters);
#else
CFStringEncoding *icuConverters = NULL;
#endif
CFStringEncoding *platformConverters = __CFStringEncodingCreateListOfAvailablePlatformConverters(NULL, &numPlatformConverters);
if ((NULL != icuConverters) || (NULL != platformConverters)) {
CFIndex numSlots = (sizeof(__CFBuiltinEncodings) / sizeof(*__CFBuiltinEncodings)) + numICUConverters + numPlatformConverters;
list = (CFStringEncoding *)CFAllocatorAllocate(NULL, sizeof(CFStringEncoding) * numSlots, 0);
memcpy(list, __CFBuiltinEncodings, sizeof(__CFBuiltinEncodings));
if (NULL != icuConverters) {
memcpy(list + (sizeof(__CFBuiltinEncodings) / sizeof(*__CFBuiltinEncodings)), icuConverters, sizeof(CFStringEncoding) * numICUConverters);