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comparison: intl/icu/source/i18n/uspoof.cpp

intl/icu/source/i18n/uspoof.cpp

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1 /*
2 ***************************************************************************
3 * Copyright (C) 2008-2013, International Business Machines Corporation
4 * and others. All Rights Reserved.
5 ***************************************************************************
6 * file name: uspoof.cpp
7 * encoding: US-ASCII
8 * tab size: 8 (not used)
9 * indentation:4
10 *
11 * created on: 2008Feb13
12 * created by: Andy Heninger
13 *
14 * Unicode Spoof Detection
15 */
16 #include "unicode/utypes.h"
17 #include "unicode/normalizer2.h"
18 #include "unicode/uspoof.h"
19 #include "unicode/ustring.h"
20 #include "unicode/utf16.h"
21 #include "cmemory.h"
22 #include "cstring.h"
23 #include "identifier_info.h"
24 #include "mutex.h"
25 #include "scriptset.h"
26 #include "uassert.h"
27 #include "ucln_in.h"
28 #include "uspoof_impl.h"
29 #include "umutex.h"
30
31
32 #if !UCONFIG_NO_NORMALIZATION
33
34 U_NAMESPACE_USE
35
36
37 //
38 // Static Objects used by the spoof impl, their thread safe initialization and their cleanup.
39 //
40 static UnicodeSet *gInclusionSet = NULL;
41 static UnicodeSet *gRecommendedSet = NULL;
42 static const Normalizer2 *gNfdNormalizer = NULL;
43 static UMutex gInitMutex = U_MUTEX_INITIALIZER;
44
45 static UBool U_CALLCONV
46 uspoof_cleanup(void) {
47 delete gInclusionSet;
48 gInclusionSet = NULL;
49 delete gRecommendedSet;
50 gRecommendedSet = NULL;
51 gNfdNormalizer = NULL;
52 return TRUE;
53 }
54
55 static void initializeStatics() {
56 Mutex m(&gInitMutex);
57 UErrorCode status = U_ZERO_ERROR;
58 if (gInclusionSet == NULL) {
59 gInclusionSet = new UnicodeSet(UNICODE_STRING_SIMPLE("[\
60 \\-.\\u00B7\\u05F3\\u05F4\\u0F0B\\u200C\\u200D\\u2019]"), status);
61 gRecommendedSet = new UnicodeSet(UNICODE_STRING_SIMPLE("[\
62 [0-z\\u00C0-\\u017E\\u01A0\\u01A1\\u01AF\\u01B0\\u01CD-\
63 \\u01DC\\u01DE-\\u01E3\\u01E6-\\u01F5\\u01F8-\\u021B\\u021E\
64 \\u021F\\u0226-\\u0233\\u02BB\\u02BC\\u02EC\\u0300-\\u0304\
65 \\u0306-\\u030C\\u030F-\\u0311\\u0313\\u0314\\u031B\\u0323-\
66 \\u0328\\u032D\\u032E\\u0330\\u0331\\u0335\\u0338\\u0339\
67 \\u0342-\\u0345\\u037B-\\u03CE\\u03FC-\\u045F\\u048A-\\u0525\
68 \\u0531-\\u0586\\u05D0-\\u05F2\\u0621-\\u063F\\u0641-\\u0655\
69 \\u0660-\\u0669\\u0670-\\u068D\\u068F-\\u06D5\\u06E5\\u06E6\
70 \\u06EE-\\u06FF\\u0750-\\u07B1\\u0901-\\u0939\\u093C-\\u094D\
71 \\u0950\\u0960-\\u0972\\u0979-\\u0A4D\\u0A5C-\\u0A74\\u0A81-\
72 \\u0B43\\u0B47-\\u0B61\\u0B66-\\u0C56\\u0C60\\u0C61\\u0C66-\
73 \\u0CD6\\u0CE0-\\u0CEF\\u0D02-\\u0D28\\u0D2A-\\u0D39\\u0D3D-\
74 \\u0D43\\u0D46-\\u0D4D\\u0D57-\\u0D61\\u0D66-\\u0D8E\\u0D91-\
75 \\u0DA5\\u0DA7-\\u0DDE\\u0DF2\\u0E01-\\u0ED9\\u0F00\\u0F20-\
76 \\u0F8B\\u0F90-\\u109D\\u10D0-\\u10F0\\u10F7-\\u10FA\\u1200-\
77 \\u135A\\u135F\\u1380-\\u138F\\u1401-\\u167F\\u1780-\\u17A2\
78 \\u17A5-\\u17A7\\u17A9-\\u17B3\\u17B6-\\u17CA\\u17D2\\u17D7-\
79 \\u17DC\\u17E0-\\u17E9\\u1810-\\u18A8\\u18AA-\\u18F5\\u1E00-\
80 \\u1E99\\u1F00-\\u1FFC\\u2D30-\\u2D65\\u2D80-\\u2DDE\\u3005-\
81 \\u3007\\u3041-\\u31B7\\u3400-\\u9FCB\\uA000-\\uA48C\\uA67F\
82 \\uA717-\\uA71F\\uA788\\uAA60-\\uAA7B\\uAC00-\\uD7A3\\uFA0E-\
83 \\uFA29\\U00020000-\
84 \\U0002B734]-[[:Cn:][:nfkcqc=n:][:XIDC=n:]]]"), status);
85 gNfdNormalizer = Normalizer2::getNFDInstance(status);
86 }
87 ucln_i18n_registerCleanup(UCLN_I18N_SPOOF, uspoof_cleanup);
88
89 return;
90 }
91
92
93 U_CAPI USpoofChecker * U_EXPORT2
94 uspoof_open(UErrorCode *status) {
95 if (U_FAILURE(*status)) {
96 return NULL;
97 }
98 initializeStatics();
99 SpoofImpl *si = new SpoofImpl(SpoofData::getDefault(*status), *status);
100 if (U_FAILURE(*status)) {
101 delete si;
102 si = NULL;
103 }
104 return reinterpret_cast<USpoofChecker *>(si);
105 }
106
107
108 U_CAPI USpoofChecker * U_EXPORT2
109 uspoof_openFromSerialized(const void *data, int32_t length, int32_t *pActualLength,
110 UErrorCode *status) {
111 if (U_FAILURE(*status)) {
112 return NULL;
113 }
114 initializeStatics();
115 SpoofData *sd = new SpoofData(data, length, *status);
116 SpoofImpl *si = new SpoofImpl(sd, *status);
117 if (U_FAILURE(*status)) {
118 delete sd;
119 delete si;
120 return NULL;
121 }
122 if (sd == NULL || si == NULL) {
123 *status = U_MEMORY_ALLOCATION_ERROR;
124 delete sd;
125 delete si;
126 return NULL;
127 }
128
129 if (pActualLength != NULL) {
130 *pActualLength = sd->fRawData->fLength;
131 }
132 return reinterpret_cast<USpoofChecker *>(si);
133 }
134
135
136 U_CAPI USpoofChecker * U_EXPORT2
137 uspoof_clone(const USpoofChecker *sc, UErrorCode *status) {
138 const SpoofImpl *src = SpoofImpl::validateThis(sc, *status);
139 if (src == NULL) {
140 return NULL;
141 }
142 SpoofImpl *result = new SpoofImpl(*src, *status); // copy constructor
143 if (U_FAILURE(*status)) {
144 delete result;
145 result = NULL;
146 }
147 return reinterpret_cast<USpoofChecker *>(result);
148 }
149
150
151 U_CAPI void U_EXPORT2
152 uspoof_close(USpoofChecker *sc) {
153 UErrorCode status = U_ZERO_ERROR;
154 SpoofImpl *This = SpoofImpl::validateThis(sc, status);
155 delete This;
156 }
157
158
159 U_CAPI void U_EXPORT2
160 uspoof_setChecks(USpoofChecker *sc, int32_t checks, UErrorCode *status) {
161 SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
162 if (This == NULL) {
163 return;
164 }
165
166 // Verify that the requested checks are all ones (bits) that
167 // are acceptable, known values.
168 if (checks & ~USPOOF_ALL_CHECKS) {
169 *status = U_ILLEGAL_ARGUMENT_ERROR;
170 return;
171 }
172
173 This->fChecks = checks;
174 }
175
176
177 U_CAPI int32_t U_EXPORT2
178 uspoof_getChecks(const USpoofChecker *sc, UErrorCode *status) {
179 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
180 if (This == NULL) {
181 return 0;
182 }
183 return This->fChecks;
184 }
185
186 U_CAPI void U_EXPORT2
187 uspoof_setRestrictionLevel(USpoofChecker *sc, URestrictionLevel restrictionLevel) {
188 UErrorCode status = U_ZERO_ERROR;
189 SpoofImpl *This = SpoofImpl::validateThis(sc, status);
190 if (This != NULL) {
191 This->fRestrictionLevel = restrictionLevel;
192 }
193 }
194
195 U_CAPI URestrictionLevel U_EXPORT2
196 uspoof_getRestrictionLevel(const USpoofChecker *sc) {
197 UErrorCode status = U_ZERO_ERROR;
198 const SpoofImpl *This = SpoofImpl::validateThis(sc, status);
199 if (This == NULL) {
200 return USPOOF_UNRESTRICTIVE;
201 }
202 return This->fRestrictionLevel;
203 }
204
205 U_CAPI void U_EXPORT2
206 uspoof_setAllowedLocales(USpoofChecker *sc, const char *localesList, UErrorCode *status) {
207 SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
208 if (This == NULL) {
209 return;
210 }
211 This->setAllowedLocales(localesList, *status);
212 }
213
214 U_CAPI const char * U_EXPORT2
215 uspoof_getAllowedLocales(USpoofChecker *sc, UErrorCode *status) {
216 SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
217 if (This == NULL) {
218 return NULL;
219 }
220 return This->getAllowedLocales(*status);
221 }
222
223
224 U_CAPI const USet * U_EXPORT2
225 uspoof_getAllowedChars(const USpoofChecker *sc, UErrorCode *status) {
226 const UnicodeSet *result = uspoof_getAllowedUnicodeSet(sc, status);
227 return result->toUSet();
228 }
229
230 U_CAPI const UnicodeSet * U_EXPORT2
231 uspoof_getAllowedUnicodeSet(const USpoofChecker *sc, UErrorCode *status) {
232 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
233 if (This == NULL) {
234 return NULL;
235 }
236 return This->fAllowedCharsSet;
237 }
238
239
240 U_CAPI void U_EXPORT2
241 uspoof_setAllowedChars(USpoofChecker *sc, const USet *chars, UErrorCode *status) {
242 const UnicodeSet *set = UnicodeSet::fromUSet(chars);
243 uspoof_setAllowedUnicodeSet(sc, set, status);
244 }
245
246
247 U_CAPI void U_EXPORT2
248 uspoof_setAllowedUnicodeSet(USpoofChecker *sc, const UnicodeSet *chars, UErrorCode *status) {
249 SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
250 if (This == NULL) {
251 return;
252 }
253 if (chars->isBogus()) {
254 *status = U_ILLEGAL_ARGUMENT_ERROR;
255 return;
256 }
257 UnicodeSet *clonedSet = static_cast<UnicodeSet *>(chars->clone());
258 if (clonedSet == NULL || clonedSet->isBogus()) {
259 *status = U_MEMORY_ALLOCATION_ERROR;
260 return;
261 }
262 clonedSet->freeze();
263 delete This->fAllowedCharsSet;
264 This->fAllowedCharsSet = clonedSet;
265 This->fChecks |= USPOOF_CHAR_LIMIT;
266 }
267
268
269 U_CAPI int32_t U_EXPORT2
270 uspoof_check(const USpoofChecker *sc,
271 const UChar *id, int32_t length,
272 int32_t *position,
273 UErrorCode *status) {
274
275 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
276 if (This == NULL) {
277 return 0;
278 }
279 if (length < -1) {
280 *status = U_ILLEGAL_ARGUMENT_ERROR;
281 return 0;
282 }
283 UnicodeString idStr((length == -1), id, length); // Aliasing constructor.
284 int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status);
285 return result;
286 }
287
288
289 U_CAPI int32_t U_EXPORT2
290 uspoof_checkUTF8(const USpoofChecker *sc,
291 const char *id, int32_t length,
292 int32_t *position,
293 UErrorCode *status) {
294
295 if (U_FAILURE(*status)) {
296 return 0;
297 }
298 UnicodeString idStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
299 int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status);
300 return result;
301 }
302
303
304 U_CAPI int32_t U_EXPORT2
305 uspoof_areConfusable(const USpoofChecker *sc,
306 const UChar *id1, int32_t length1,
307 const UChar *id2, int32_t length2,
308 UErrorCode *status) {
309 SpoofImpl::validateThis(sc, *status);
310 if (U_FAILURE(*status)) {
311 return 0;
312 }
313 if (length1 < -1 || length2 < -1) {
314 *status = U_ILLEGAL_ARGUMENT_ERROR;
315 return 0;
316 }
317
318 UnicodeString id1Str((length1==-1), id1, length1); // Aliasing constructor
319 UnicodeString id2Str((length2==-1), id2, length2); // Aliasing constructor
320 return uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
321 }
322
323
324 U_CAPI int32_t U_EXPORT2
325 uspoof_areConfusableUTF8(const USpoofChecker *sc,
326 const char *id1, int32_t length1,
327 const char *id2, int32_t length2,
328 UErrorCode *status) {
329 SpoofImpl::validateThis(sc, *status);
330 if (U_FAILURE(*status)) {
331 return 0;
332 }
333 if (length1 < -1 || length2 < -1) {
334 *status = U_ILLEGAL_ARGUMENT_ERROR;
335 return 0;
336 }
337 UnicodeString id1Str = UnicodeString::fromUTF8(StringPiece(id1, length1>=0? length1 : uprv_strlen(id1)));
338 UnicodeString id2Str = UnicodeString::fromUTF8(StringPiece(id2, length2>=0? length2 : uprv_strlen(id2)));
339 int32_t results = uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
340 return results;
341 }
342
343
344 U_CAPI int32_t U_EXPORT2
345 uspoof_areConfusableUnicodeString(const USpoofChecker *sc,
346 const icu::UnicodeString &id1,
347 const icu::UnicodeString &id2,
348 UErrorCode *status) {
349 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
350 if (U_FAILURE(*status)) {
351 return 0;
352 }
353 //
354 // See section 4 of UAX 39 for the algorithm for checking whether two strings are confusable,
355 // and for definitions of the types (single, whole, mixed-script) of confusables.
356
357 // We only care about a few of the check flags. Ignore the others.
358 // If no tests relavant to this function have been specified, return an error.
359 // TODO: is this really the right thing to do? It's probably an error on the caller's part,
360 // but logically we would just return 0 (no error).
361 if ((This->fChecks & (USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE |
362 USPOOF_WHOLE_SCRIPT_CONFUSABLE)) == 0) {
363 *status = U_INVALID_STATE_ERROR;
364 return 0;
365 }
366 int32_t flagsForSkeleton = This->fChecks & USPOOF_ANY_CASE;
367
368 int32_t result = 0;
369 IdentifierInfo *identifierInfo = This->getIdentifierInfo(*status);
370 if (U_FAILURE(*status)) {
371 return 0;
372 }
373 identifierInfo->setIdentifier(id1, *status);
374 int32_t id1ScriptCount = identifierInfo->getScriptCount();
375 identifierInfo->setIdentifier(id2, *status);
376 int32_t id2ScriptCount = identifierInfo->getScriptCount();
377 This->releaseIdentifierInfo(identifierInfo);
378 identifierInfo = NULL;
379
380 if (This->fChecks & USPOOF_SINGLE_SCRIPT_CONFUSABLE) {
381 UnicodeString id1Skeleton;
382 UnicodeString id2Skeleton;
383 if (id1ScriptCount <= 1 && id2ScriptCount <= 1) {
384 flagsForSkeleton |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
385 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status);
386 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status);
387 if (id1Skeleton == id2Skeleton) {
388 result |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
389 }
390 }
391 }
392
393 if (result & USPOOF_SINGLE_SCRIPT_CONFUSABLE) {
394 // If the two inputs are single script confusable they cannot also be
395 // mixed or whole script confusable, according to the UAX39 definitions.
396 // So we can skip those tests.
397 return result;
398 }
399
400 // Two identifiers are whole script confusable if each is of a single script
401 // and they are mixed script confusable.
402 UBool possiblyWholeScriptConfusables =
403 id1ScriptCount <= 1 && id2ScriptCount <= 1 && (This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE);
404
405 //
406 // Mixed Script Check
407 //
408 if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) || possiblyWholeScriptConfusables ) {
409 // For getSkeleton(), resetting the USPOOF_SINGLE_SCRIPT_CONFUSABLE flag will get us
410 // the mixed script table skeleton, which is what we want.
411 // The Any Case / Lower Case bit in the skelton flags was set at the top of the function.
412 UnicodeString id1Skeleton;
413 UnicodeString id2Skeleton;
414 flagsForSkeleton &= ~USPOOF_SINGLE_SCRIPT_CONFUSABLE;
415 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status);
416 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status);
417 if (id1Skeleton == id2Skeleton) {
418 result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
419 if (possiblyWholeScriptConfusables) {
420 result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
421 }
422 }
423 }
424
425 return result;
426 }
427
428
429
430
431 U_CAPI int32_t U_EXPORT2
432 uspoof_checkUnicodeString(const USpoofChecker *sc,
433 const icu::UnicodeString &id,
434 int32_t *position,
435 UErrorCode *status) {
436 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
437 if (This == NULL) {
438 return 0;
439 }
440 int32_t result = 0;
441
442 IdentifierInfo *identifierInfo = NULL;
443 if ((This->fChecks) & (USPOOF_RESTRICTION_LEVEL | USPOOF_MIXED_NUMBERS)) {
444 identifierInfo = This->getIdentifierInfo(*status);
445 if (U_FAILURE(*status)) {
446 goto cleanupAndReturn;
447 }
448 identifierInfo->setIdentifier(id, *status);
449 identifierInfo->setIdentifierProfile(*This->fAllowedCharsSet);
450 }
451
452
453 if ((This->fChecks) & USPOOF_RESTRICTION_LEVEL) {
454 URestrictionLevel idRestrictionLevel = identifierInfo->getRestrictionLevel(*status);
455 if (idRestrictionLevel > This->fRestrictionLevel) {
456 result |= USPOOF_RESTRICTION_LEVEL;
457 }
458 if (This->fChecks & USPOOF_AUX_INFO) {
459 result |= idRestrictionLevel;
460 }
461 }
462
463 if ((This->fChecks) & USPOOF_MIXED_NUMBERS) {
464 const UnicodeSet *numerics = identifierInfo->getNumerics();
465 if (numerics->size() > 1) {
466 result |= USPOOF_MIXED_NUMBERS;
467 }
468
469 // TODO: ICU4J returns the UnicodeSet of the numerics found in the identifier.
470 // We have no easy way to do the same in C.
471 // if (checkResult != null) {
472 // checkResult.numerics = numerics;
473 // }
474 }
475
476
477 if (This->fChecks & (USPOOF_CHAR_LIMIT)) {
478 int32_t i;
479 UChar32 c;
480 int32_t length = id.length();
481 for (i=0; i<length ;) {
482 c = id.char32At(i);
483 i += U16_LENGTH(c);
484 if (!This->fAllowedCharsSet->contains(c)) {
485 result |= USPOOF_CHAR_LIMIT;
486 break;
487 }
488 }
489 }
490
491 if (This->fChecks &
492 (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE | USPOOF_INVISIBLE)) {
493 // These are the checks that need to be done on NFD input
494 UnicodeString nfdText;
495 gNfdNormalizer->normalize(id, nfdText, *status);
496 int32_t nfdLength = nfdText.length();
497
498 if (This->fChecks & USPOOF_INVISIBLE) {
499
500 // scan for more than one occurence of the same non-spacing mark
501 // in a sequence of non-spacing marks.
502 int32_t i;
503 UChar32 c;
504 UChar32 firstNonspacingMark = 0;
505 UBool haveMultipleMarks = FALSE;
506 UnicodeSet marksSeenSoFar; // Set of combining marks in a single combining sequence.
507
508 for (i=0; i<nfdLength ;) {
509 c = nfdText.char32At(i);
510 i += U16_LENGTH(c);
511 if (u_charType(c) != U_NON_SPACING_MARK) {
512 firstNonspacingMark = 0;
513 if (haveMultipleMarks) {
514 marksSeenSoFar.clear();
515 haveMultipleMarks = FALSE;
516 }
517 continue;
518 }
519 if (firstNonspacingMark == 0) {
520 firstNonspacingMark = c;
521 continue;
522 }
523 if (!haveMultipleMarks) {
524 marksSeenSoFar.add(firstNonspacingMark);
525 haveMultipleMarks = TRUE;
526 }
527 if (marksSeenSoFar.contains(c)) {
528 // report the error, and stop scanning.
529 // No need to find more than the first failure.
530 result |= USPOOF_INVISIBLE;
531 break;
532 }
533 marksSeenSoFar.add(c);
534 }
535 }
536
537
538 if (This->fChecks & (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE)) {
539 // The basic test is the same for both whole and mixed script confusables.
540 // Compute the set of scripts that every input character has a confusable in.
541 // For this computation an input character is always considered to be
542 // confusable with itself in its own script.
543 //
544 // If the number of such scripts is two or more, and the input consisted of
545 // characters all from a single script, we have a whole script confusable.
546 // (The two scripts will be the original script and the one that is confusable)
547 //
548 // If the number of such scripts >= one, and the original input contained characters from
549 // more than one script, we have a mixed script confusable. (We can transform
550 // some of the characters, and end up with a visually similar string all in
551 // one script.)
552
553 if (identifierInfo == NULL) {
554 identifierInfo = This->getIdentifierInfo(*status);
555 if (U_FAILURE(*status)) {
556 goto cleanupAndReturn;
557 }
558 identifierInfo->setIdentifier(id, *status);
559 }
560
561 int32_t scriptCount = identifierInfo->getScriptCount();
562
563 ScriptSet scripts;
564 This->wholeScriptCheck(nfdText, &scripts, *status);
565 int32_t confusableScriptCount = scripts.countMembers();
566 //printf("confusableScriptCount = %d\n", confusableScriptCount);
567
568 if ((This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE) &&
569 confusableScriptCount >= 2 &&
570 scriptCount == 1) {
571 result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
572 }
573
574 if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) &&
575 confusableScriptCount >= 1 &&
576 scriptCount > 1) {
577 result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
578 }
579 }
580 }
581
582 cleanupAndReturn:
583 This->releaseIdentifierInfo(identifierInfo);
584 if (position != NULL) {
585 *position = 0;
586 }
587 return result;
588 }
589
590
591 U_CAPI int32_t U_EXPORT2
592 uspoof_getSkeleton(const USpoofChecker *sc,
593 uint32_t type,
594 const UChar *id, int32_t length,
595 UChar *dest, int32_t destCapacity,
596 UErrorCode *status) {
597
598 SpoofImpl::validateThis(sc, *status);
599 if (U_FAILURE(*status)) {
600 return 0;
601 }
602 if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
603 *status = U_ILLEGAL_ARGUMENT_ERROR;
604 return 0;
605 }
606
607 UnicodeString idStr((length==-1), id, length); // Aliasing constructor
608 UnicodeString destStr;
609 uspoof_getSkeletonUnicodeString(sc, type, idStr, destStr, status);
610 destStr.extract(dest, destCapacity, *status);
611 return destStr.length();
612 }
613
614
615
616 U_I18N_API UnicodeString & U_EXPORT2
617 uspoof_getSkeletonUnicodeString(const USpoofChecker *sc,
618 uint32_t type,
619 const UnicodeString &id,
620 UnicodeString &dest,
621 UErrorCode *status) {
622 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
623 if (U_FAILURE(*status)) {
624 return dest;
625 }
626
627 int32_t tableMask = 0;
628 switch (type) {
629 case 0:
630 tableMask = USPOOF_ML_TABLE_FLAG;
631 break;
632 case USPOOF_SINGLE_SCRIPT_CONFUSABLE:
633 tableMask = USPOOF_SL_TABLE_FLAG;
634 break;
635 case USPOOF_ANY_CASE:
636 tableMask = USPOOF_MA_TABLE_FLAG;
637 break;
638 case USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_ANY_CASE:
639 tableMask = USPOOF_SA_TABLE_FLAG;
640 break;
641 default:
642 *status = U_ILLEGAL_ARGUMENT_ERROR;
643 return dest;
644 }
645
646 UnicodeString nfdId;
647 gNfdNormalizer->normalize(id, nfdId, *status);
648
649 // Apply the skeleton mapping to the NFD normalized input string
650 // Accumulate the skeleton, possibly unnormalized, in a UnicodeString.
651 int32_t inputIndex = 0;
652 UnicodeString skelStr;
653 int32_t normalizedLen = nfdId.length();
654 for (inputIndex=0; inputIndex < normalizedLen; ) {
655 UChar32 c = nfdId.char32At(inputIndex);
656 inputIndex += U16_LENGTH(c);
657 This->confusableLookup(c, tableMask, skelStr);
658 }
659
660 gNfdNormalizer->normalize(skelStr, dest, *status);
661 return dest;
662 }
663
664
665 U_CAPI int32_t U_EXPORT2
666 uspoof_getSkeletonUTF8(const USpoofChecker *sc,
667 uint32_t type,
668 const char *id, int32_t length,
669 char *dest, int32_t destCapacity,
670 UErrorCode *status) {
671 SpoofImpl::validateThis(sc, *status);
672 if (U_FAILURE(*status)) {
673 return 0;
674 }
675 if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
676 *status = U_ILLEGAL_ARGUMENT_ERROR;
677 return 0;
678 }
679
680 UnicodeString srcStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
681 UnicodeString destStr;
682 uspoof_getSkeletonUnicodeString(sc, type, srcStr, destStr, status);
683 if (U_FAILURE(*status)) {
684 return 0;
685 }
686
687 int32_t lengthInUTF8 = 0;
688 u_strToUTF8(dest, destCapacity, &lengthInUTF8,
689 destStr.getBuffer(), destStr.length(), status);
690 return lengthInUTF8;
691 }
692
693
694 U_CAPI int32_t U_EXPORT2
695 uspoof_serialize(USpoofChecker *sc,void *buf, int32_t capacity, UErrorCode *status) {
696 SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
697 if (This == NULL) {
698 U_ASSERT(U_FAILURE(*status));
699 return 0;
700 }
701 int32_t dataSize = This->fSpoofData->fRawData->fLength;
702 if (capacity < dataSize) {
703 *status = U_BUFFER_OVERFLOW_ERROR;
704 return dataSize;
705 }
706 uprv_memcpy(buf, This->fSpoofData->fRawData, dataSize);
707 return dataSize;
708 }
709
710 U_CAPI const USet * U_EXPORT2
711 uspoof_getInclusionSet(UErrorCode *) {
712 initializeStatics();
713 return gInclusionSet->toUSet();
714 }
715
716 U_CAPI const USet * U_EXPORT2
717 uspoof_getRecommendedSet(UErrorCode *) {
718 initializeStatics();
719 return gRecommendedSet->toUSet();
720 }
721
722 U_I18N_API const UnicodeSet * U_EXPORT2
723 uspoof_getInclusionUnicodeSet(UErrorCode *) {
724 initializeStatics();
725 return gInclusionSet;
726 }
727
728 U_I18N_API const UnicodeSet * U_EXPORT2
729 uspoof_getRecommendedUnicodeSet(UErrorCode *) {
730 initializeStatics();
731 return gRecommendedSet;
732 }
733
734
735
736 #endif // !UCONFIG_NO_NORMALIZATION

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