ucol_sit.cpp (21660B)
1 // © 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ******************************************************************************* 5 * Copyright (C) 2004-2016, International Business Machines 6 * Corporation and others. All Rights Reserved. 7 ******************************************************************************* 8 * file name: ucol_sit.cpp 9 * encoding: UTF-8 10 * tab size: 8 (not used) 11 * indentation:4 12 * 13 * Modification history 14 * Date Name Comments 15 * 03/12/2004 weiv Creation 16 */ 17 18 #include "unicode/ustring.h" 19 #include "unicode/udata.h" 20 #include "unicode/utf16.h" 21 #include "utracimp.h" 22 #include "ucol_imp.h" 23 #include "ulocimp.h" 24 #include "cmemory.h" 25 #include "cstring.h" 26 #include "uresimp.h" 27 #include "unicode/coll.h" 28 #include "unicode/stringpiece.h" 29 #include "charstr.h" 30 31 U_NAMESPACE_USE 32 33 #ifdef UCOL_TRACE_SIT 34 # include <stdio.h> 35 #endif 36 37 #if !UCONFIG_NO_COLLATION 38 39 #include "unicode/tblcoll.h" 40 41 enum OptionsList { 42 UCOL_SIT_LANGUAGE = 0, 43 UCOL_SIT_SCRIPT = 1, 44 UCOL_SIT_REGION = 2, 45 UCOL_SIT_VARIANT = 3, 46 UCOL_SIT_KEYWORD = 4, 47 UCOL_SIT_PROVIDER = 5, 48 UCOL_SIT_LOCELEMENT_MAX = UCOL_SIT_PROVIDER, /* the last element that's part of LocElements */ 49 50 UCOL_SIT_BCP47, 51 UCOL_SIT_STRENGTH, 52 UCOL_SIT_CASE_LEVEL, 53 UCOL_SIT_CASE_FIRST, 54 UCOL_SIT_NUMERIC_COLLATION, 55 UCOL_SIT_ALTERNATE_HANDLING, 56 UCOL_SIT_NORMALIZATION_MODE, 57 UCOL_SIT_FRENCH_COLLATION, 58 UCOL_SIT_HIRAGANA_QUATERNARY, 59 UCOL_SIT_VARIABLE_TOP, 60 UCOL_SIT_VARIABLE_TOP_VALUE, 61 UCOL_SIT_ITEMS_COUNT 62 }; 63 64 /* option starters chars. */ 65 static const char alternateHArg = 'A'; 66 static const char variableTopValArg = 'B'; 67 static const char caseFirstArg = 'C'; 68 static const char numericCollArg = 'D'; 69 static const char caseLevelArg = 'E'; 70 static const char frenchCollArg = 'F'; 71 static const char hiraganaQArg = 'H'; 72 static const char keywordArg = 'K'; 73 static const char languageArg = 'L'; 74 static const char normArg = 'N'; 75 static const char providerArg = 'P'; 76 static const char regionArg = 'R'; 77 static const char strengthArg = 'S'; 78 static const char variableTopArg = 'T'; 79 static const char variantArg = 'V'; 80 static const char RFC3066Arg = 'X'; 81 static const char scriptArg = 'Z'; 82 83 static const char collationKeyword[] = "@collation="; 84 static const char providerKeyword[] = "@sp="; 85 86 87 static const int32_t locElementCount = UCOL_SIT_LOCELEMENT_MAX+1; 88 static const int32_t locElementCapacity = 32; 89 static const int32_t loc3066Capacity = 256; 90 91 /* structure containing specification of a collator. Initialized 92 * from a short string. Also used to construct a short string from a 93 * collator instance 94 */ 95 struct CollatorSpec { 96 inline CollatorSpec(); 97 98 CharString locElements[locElementCount]; 99 CharString locale; 100 UColAttributeValue options[UCOL_ATTRIBUTE_COUNT]; 101 uint32_t variableTopValue; 102 char16_t variableTopString[locElementCapacity]; 103 int32_t variableTopStringLen; 104 UBool variableTopSet; 105 CharString entries[UCOL_SIT_ITEMS_COUNT]; 106 }; 107 108 CollatorSpec::CollatorSpec() : 109 locale(), 110 variableTopValue(0), 111 variableTopString(), 112 variableTopSet(false) 113 { 114 // set collation options to default 115 for(int32_t i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) { 116 options[i] = UCOL_DEFAULT; 117 } 118 } 119 120 121 /* structure for converting between character attribute 122 * representation and real collation attribute value. 123 */ 124 struct AttributeConversion { 125 char letter; 126 UColAttributeValue value; 127 }; 128 129 static const AttributeConversion conversions[12] = { 130 { '1', UCOL_PRIMARY }, 131 { '2', UCOL_SECONDARY }, 132 { '3', UCOL_TERTIARY }, 133 { '4', UCOL_QUATERNARY }, 134 { 'D', UCOL_DEFAULT }, 135 { 'I', UCOL_IDENTICAL }, 136 { 'L', UCOL_LOWER_FIRST }, 137 { 'N', UCOL_NON_IGNORABLE }, 138 { 'O', UCOL_ON }, 139 { 'S', UCOL_SHIFTED }, 140 { 'U', UCOL_UPPER_FIRST }, 141 { 'X', UCOL_OFF } 142 }; 143 144 145 static UColAttributeValue 146 ucol_sit_letterToAttributeValue(char letter, UErrorCode *status) { 147 uint32_t i = 0; 148 for(i = 0; i < UPRV_LENGTHOF(conversions); i++) { 149 if(conversions[i].letter == letter) { 150 return conversions[i].value; 151 } 152 } 153 *status = U_ILLEGAL_ARGUMENT_ERROR; 154 #ifdef UCOL_TRACE_SIT 155 fprintf(stderr, "%s:%d: unknown letter %c: %s\n", __FILE__, __LINE__, letter, u_errorName(*status)); 156 #endif 157 return UCOL_DEFAULT; 158 } 159 160 /* function prototype for functions used to parse a short string */ 161 U_CDECL_BEGIN 162 typedef const char* U_CALLCONV 163 ActionFunction(CollatorSpec *spec, uint32_t value1, const char* string, 164 UErrorCode *status); 165 U_CDECL_END 166 167 U_CDECL_BEGIN 168 static const char* U_CALLCONV 169 _processLocaleElement(CollatorSpec *spec, uint32_t value, const char* string, 170 UErrorCode *status) 171 { 172 do { 173 if(value == UCOL_SIT_LANGUAGE || value == UCOL_SIT_KEYWORD || value == UCOL_SIT_PROVIDER) { 174 spec->locElements[value].append(uprv_tolower(*string), *status); 175 } else { 176 spec->locElements[value].append(*string, *status); 177 } 178 } while(*(++string) != '_' && *string && U_SUCCESS(*status)); 179 // don't skip the underscore at the end 180 return string; 181 } 182 U_CDECL_END 183 184 U_CDECL_BEGIN 185 static const char* U_CALLCONV 186 _processRFC3066Locale(CollatorSpec *spec, uint32_t, const char* string, 187 UErrorCode *status) 188 { 189 char terminator = *string; 190 string++; 191 const char *end = uprv_strchr(string+1, terminator); 192 if(end == nullptr || end - string >= loc3066Capacity) { 193 *status = U_BUFFER_OVERFLOW_ERROR; 194 return string; 195 } else { 196 spec->locale.copyFrom(CharString(string, static_cast<int32_t>(end-string), *status), *status); 197 return end+1; 198 } 199 } 200 201 U_CDECL_END 202 203 U_CDECL_BEGIN 204 static const char* U_CALLCONV 205 _processCollatorOption(CollatorSpec *spec, uint32_t option, const char* string, 206 UErrorCode *status) 207 { 208 spec->options[option] = ucol_sit_letterToAttributeValue(*string, status); 209 if((*(++string) != '_' && *string) || U_FAILURE(*status)) { 210 #ifdef UCOL_TRACE_SIT 211 fprintf(stderr, "%s:%d: unknown collator option at '%s': %s\n", __FILE__, __LINE__, string, u_errorName(*status)); 212 #endif 213 *status = U_ILLEGAL_ARGUMENT_ERROR; 214 } 215 return string; 216 } 217 U_CDECL_END 218 219 220 static char16_t 221 readHexCodeUnit(const char **string, UErrorCode *status) 222 { 223 char16_t result = 0; 224 int32_t value = 0; 225 char c; 226 int32_t noDigits = 0; 227 while((c = **string) != 0 && noDigits < 4) { 228 if( c >= '0' && c <= '9') { 229 value = c - '0'; 230 } else if ( c >= 'a' && c <= 'f') { 231 value = c - 'a' + 10; 232 } else if ( c >= 'A' && c <= 'F') { 233 value = c - 'A' + 10; 234 } else { 235 *status = U_ILLEGAL_ARGUMENT_ERROR; 236 #ifdef UCOL_TRACE_SIT 237 fprintf(stderr, "%s:%d: Bad hex char at '%s': %s\n", __FILE__, __LINE__, *string, u_errorName(*status)); 238 #endif 239 return 0; 240 } 241 result = (result << 4) | static_cast<char16_t>(value); 242 noDigits++; 243 (*string)++; 244 } 245 // if the string was terminated before we read 4 digits, set an error 246 if(noDigits < 4) { 247 *status = U_ILLEGAL_ARGUMENT_ERROR; 248 #ifdef UCOL_TRACE_SIT 249 fprintf(stderr, "%s:%d: Short (only %d digits, wanted 4) at '%s': %s\n", __FILE__, __LINE__, noDigits,*string, u_errorName(*status)); 250 #endif 251 } 252 return result; 253 } 254 255 U_CDECL_BEGIN 256 static const char* U_CALLCONV 257 _processVariableTop(CollatorSpec *spec, uint32_t value1, const char* string, UErrorCode *status) 258 { 259 // get four digits 260 int32_t i = 0; 261 if(!value1) { 262 while(U_SUCCESS(*status) && i < locElementCapacity && *string != 0 && *string != '_') { 263 spec->variableTopString[i++] = readHexCodeUnit(&string, status); 264 } 265 spec->variableTopStringLen = i; 266 if(i == locElementCapacity && *string != 0 && *string != '_') { 267 *status = U_BUFFER_OVERFLOW_ERROR; 268 } 269 } else { 270 spec->variableTopValue = readHexCodeUnit(&string, status); 271 } 272 if(U_SUCCESS(*status)) { 273 spec->variableTopSet = true; 274 } 275 return string; 276 } 277 U_CDECL_END 278 279 280 /* Table for parsing short strings */ 281 struct ShortStringOptions { 282 char optionStart; 283 ActionFunction *action; 284 uint32_t attr; 285 }; 286 287 static const ShortStringOptions options[UCOL_SIT_ITEMS_COUNT] = 288 { 289 /* 10 ALTERNATE_HANDLING */ {alternateHArg, _processCollatorOption, UCOL_ALTERNATE_HANDLING }, // alternate N, S, D 290 /* 15 VARIABLE_TOP_VALUE */ {variableTopValArg, _processVariableTop, 1 }, 291 /* 08 CASE_FIRST */ {caseFirstArg, _processCollatorOption, UCOL_CASE_FIRST }, // case first L, U, X, D 292 /* 09 NUMERIC_COLLATION */ {numericCollArg, _processCollatorOption, UCOL_NUMERIC_COLLATION }, // codan O, X, D 293 /* 07 CASE_LEVEL */ {caseLevelArg, _processCollatorOption, UCOL_CASE_LEVEL }, // case level O, X, D 294 /* 12 FRENCH_COLLATION */ {frenchCollArg, _processCollatorOption, UCOL_FRENCH_COLLATION }, // french O, X, D 295 /* 13 HIRAGANA_QUATERNARY] */ {hiraganaQArg, _processCollatorOption, UCOL_HIRAGANA_QUATERNARY_MODE }, // hiragana O, X, D 296 /* 04 KEYWORD */ {keywordArg, _processLocaleElement, UCOL_SIT_KEYWORD }, // keyword 297 /* 00 LANGUAGE */ {languageArg, _processLocaleElement, UCOL_SIT_LANGUAGE }, // language 298 /* 11 NORMALIZATION_MODE */ {normArg, _processCollatorOption, UCOL_NORMALIZATION_MODE }, // norm O, X, D 299 /* 02 REGION */ {regionArg, _processLocaleElement, UCOL_SIT_REGION }, // region 300 /* 06 STRENGTH */ {strengthArg, _processCollatorOption, UCOL_STRENGTH }, // strength 1, 2, 3, 4, I, D 301 /* 14 VARIABLE_TOP */ {variableTopArg, _processVariableTop, 0 }, 302 /* 03 VARIANT */ {variantArg, _processLocaleElement, UCOL_SIT_VARIANT }, // variant 303 /* 05 RFC3066BIS */ {RFC3066Arg, _processRFC3066Locale, 0 }, // rfc3066bis locale name 304 /* 01 SCRIPT */ {scriptArg, _processLocaleElement, UCOL_SIT_SCRIPT }, // script 305 /* PROVIDER */ {providerArg, _processLocaleElement, UCOL_SIT_PROVIDER } 306 }; 307 308 309 static 310 const char* ucol_sit_readOption(const char *start, CollatorSpec *spec, 311 UErrorCode *status) 312 { 313 int32_t i = 0; 314 315 for(i = 0; i < UCOL_SIT_ITEMS_COUNT; i++) { 316 if(*start == options[i].optionStart) { 317 const char* end = options[i].action(spec, options[i].attr, start+1, status); 318 #ifdef UCOL_TRACE_SIT 319 fprintf(stderr, "***Set %d to %s...\n", i, start); 320 #endif 321 // assume 'start' does not go away through all this 322 spec->entries[i].copyFrom(CharString(start, static_cast<int32_t>(end - start), *status), *status); 323 return end; 324 } 325 } 326 *status = U_ILLEGAL_ARGUMENT_ERROR; 327 #ifdef UCOL_TRACE_SIT 328 fprintf(stderr, "%s:%d: Unknown option at '%s': %s\n", __FILE__, __LINE__, start, u_errorName(*status)); 329 #endif 330 return start; 331 } 332 333 static const char* 334 ucol_sit_readSpecs(CollatorSpec *s, const char *string, 335 UParseError *parseError, UErrorCode *status) 336 { 337 const char *definition = string; 338 while(U_SUCCESS(*status) && *string) { 339 string = ucol_sit_readOption(string, s, status); 340 // advance over '_' 341 while(*string && *string == '_') { 342 string++; 343 } 344 } 345 if(U_FAILURE(*status)) { 346 parseError->offset = static_cast<int32_t>(string - definition); 347 } 348 return string; 349 } 350 351 static 352 int32_t ucol_sit_dumpSpecs(CollatorSpec *s, char *destination, int32_t capacity, UErrorCode *status) 353 { 354 int32_t i = 0, j = 0; 355 int32_t len = 0; 356 char optName; 357 if(U_SUCCESS(*status)) { 358 for(i = 0; i < UCOL_SIT_ITEMS_COUNT; i++) { 359 if(!s->entries[i].isEmpty()) { 360 if(len) { 361 if(len < capacity) { 362 uprv_strcat(destination, "_"); 363 } 364 len++; 365 } 366 optName = s->entries[i][0]; 367 if(optName == languageArg || optName == regionArg || optName == variantArg || optName == keywordArg) { 368 for(j = 0; j < s->entries[i].length(); j++) { 369 if(len + j < capacity) { 370 destination[len+j] = uprv_toupper(s->entries[i][j]); 371 } 372 } 373 len += s->entries[i].length(); 374 } else { 375 len += s->entries[i].extract(destination + len, capacity - len, *status); 376 } 377 } 378 } 379 return len; 380 } else { 381 return 0; 382 } 383 } 384 385 static void 386 ucol_sit_calculateWholeLocale(CollatorSpec *s, UErrorCode &status) { 387 // put the locale together, unless we have a done 388 // locale 389 if(s->locale.isEmpty()) { 390 // first the language 391 s->locale.append(s->locElements[UCOL_SIT_LANGUAGE], status); 392 // then the script, if present 393 if(!s->locElements[UCOL_SIT_SCRIPT].isEmpty()) { 394 s->locale.append("_", status); 395 s->locale.append(s->locElements[UCOL_SIT_SCRIPT], status); 396 } 397 // then the region, if present 398 if(!s->locElements[UCOL_SIT_REGION].isEmpty()) { 399 s->locale.append("_", status); 400 s->locale.append(s->locElements[UCOL_SIT_REGION], status); 401 } else if(!s->locElements[UCOL_SIT_VARIANT].isEmpty()) { // if there is a variant, we need an underscore 402 s->locale.append("_", status); 403 } 404 // add variant, if there 405 if(!s->locElements[UCOL_SIT_VARIANT].isEmpty()) { 406 s->locale.append("_", status); 407 s->locale.append(s->locElements[UCOL_SIT_VARIANT], status); 408 } 409 410 // if there is a collation keyword, add that too 411 if(!s->locElements[UCOL_SIT_KEYWORD].isEmpty()) { 412 s->locale.append(collationKeyword, status); 413 s->locale.append(s->locElements[UCOL_SIT_KEYWORD], status); 414 } 415 416 // if there is a provider keyword, add that too 417 if(!s->locElements[UCOL_SIT_PROVIDER].isEmpty()) { 418 s->locale.append(providerKeyword, status); 419 s->locale.append(s->locElements[UCOL_SIT_PROVIDER], status); 420 } 421 } 422 } 423 424 425 U_CAPI void U_EXPORT2 426 ucol_prepareShortStringOpen( const char *definition, 427 UBool, 428 UParseError *parseError, 429 UErrorCode *status) 430 { 431 if(U_FAILURE(*status)) return; 432 433 UParseError internalParseError; 434 435 if(!parseError) { 436 parseError = &internalParseError; 437 } 438 parseError->line = 0; 439 parseError->offset = 0; 440 parseError->preContext[0] = 0; 441 parseError->postContext[0] = 0; 442 443 444 // first we want to pick stuff out of short string. 445 // we'll end up with an UCA version, locale and a bunch of 446 // settings 447 448 // analyse the string in order to get everything we need. 449 CollatorSpec s; 450 ucol_sit_readSpecs(&s, definition, parseError, status); 451 ucol_sit_calculateWholeLocale(&s, *status); 452 453 CharString buffer = ulocimp_canonicalize(s.locale.toStringPiece(), *status); 454 455 UResourceBundle *b = ures_open(U_ICUDATA_COLL, buffer.data(), status); 456 /* we try to find stuff from keyword */ 457 UResourceBundle *collations = ures_getByKey(b, "collations", nullptr, status); 458 UResourceBundle *collElem = nullptr; 459 // if there is a keyword, we pick it up and try to get elements 460 CharString keyBuffer = ulocimp_getKeywordValue(buffer.data(), "collation", *status); 461 if(keyBuffer.isEmpty()) { 462 // no keyword 463 // we try to find the default setting, which will give us the keyword value 464 UResourceBundle *defaultColl = ures_getByKeyWithFallback(collations, "default", nullptr, status); 465 if(U_SUCCESS(*status)) { 466 int32_t defaultKeyLen = 0; 467 const char16_t *defaultKey = ures_getString(defaultColl, &defaultKeyLen, status); 468 keyBuffer.appendInvariantChars(defaultKey, defaultKeyLen, *status); 469 } else { 470 *status = U_INTERNAL_PROGRAM_ERROR; 471 return; 472 } 473 ures_close(defaultColl); 474 } 475 collElem = ures_getByKeyWithFallback(collations, keyBuffer.data(), collElem, status); 476 ures_close(collElem); 477 ures_close(collations); 478 ures_close(b); 479 } 480 481 482 U_CAPI UCollator* U_EXPORT2 483 ucol_openFromShortString( const char *definition, 484 UBool forceDefaults, 485 UParseError *parseError, 486 UErrorCode *status) 487 { 488 UTRACE_ENTRY_OC(UTRACE_UCOL_OPEN_FROM_SHORT_STRING); 489 UTRACE_DATA1(UTRACE_INFO, "short string = \"%s\"", definition); 490 491 if (U_FAILURE(*status)) return nullptr; 492 493 UParseError internalParseError; 494 495 if(!parseError) { 496 parseError = &internalParseError; 497 } 498 parseError->line = 0; 499 parseError->offset = 0; 500 parseError->preContext[0] = 0; 501 parseError->postContext[0] = 0; 502 503 504 // first we want to pick stuff out of short string. 505 // we'll end up with an UCA version, locale and a bunch of 506 // settings 507 508 // analyse the string in order to get everything we need. 509 const char *string = definition; 510 CollatorSpec s; 511 string = ucol_sit_readSpecs(&s, definition, parseError, status); 512 ucol_sit_calculateWholeLocale(&s, *status); 513 514 #ifdef UCOL_TRACE_SIT 515 fprintf(stderr, "DEF %s, DATA %s, ERR %s\n", definition, s.locale.data(), u_errorName(*status)); 516 #endif 517 CharString buffer = ulocimp_canonicalize(s.locale.toStringPiece(), *status); 518 519 UCollator *result = ucol_open(buffer.data(), status); 520 int32_t i = 0; 521 522 for(i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) { 523 if(s.options[i] != UCOL_DEFAULT) { 524 if(forceDefaults || ucol_getAttribute(result, (UColAttribute)i, status) != s.options[i]) { 525 ucol_setAttribute(result, (UColAttribute)i, s.options[i], status); 526 } 527 528 if(U_FAILURE(*status)) { 529 parseError->offset = (int32_t)(string - definition); 530 ucol_close(result); 531 return nullptr; 532 } 533 534 } 535 } 536 if(s.variableTopSet) { 537 if(s.variableTopString[0]) { 538 ucol_setVariableTop(result, s.variableTopString, s.variableTopStringLen, status); 539 } else { // we set by value, using 'B' 540 ucol_restoreVariableTop(result, s.variableTopValue, status); 541 } 542 } 543 544 545 if(U_FAILURE(*status)) { // here it can only be a bogus value 546 ucol_close(result); 547 result = nullptr; 548 } 549 550 UTRACE_EXIT_PTR_STATUS(result, *status); 551 return result; 552 } 553 554 555 U_CAPI int32_t U_EXPORT2 556 ucol_getShortDefinitionString(const UCollator *coll, 557 const char *locale, 558 char *dst, 559 int32_t capacity, 560 UErrorCode *status) 561 { 562 if(U_FAILURE(*status)) return 0; 563 if(coll == nullptr) { 564 *status = U_ILLEGAL_ARGUMENT_ERROR; 565 return 0; 566 } 567 return ((icu::Collator*)coll)->internalGetShortDefinitionString(locale,dst,capacity,*status); 568 } 569 570 U_CAPI int32_t U_EXPORT2 571 ucol_normalizeShortDefinitionString(const char *definition, 572 char *destination, 573 int32_t capacity, 574 UParseError *parseError, 575 UErrorCode *status) 576 { 577 578 if(U_FAILURE(*status)) { 579 return 0; 580 } 581 582 if(destination) { 583 uprv_memset(destination, 0, capacity*sizeof(char)); 584 } 585 586 UParseError pe; 587 if(!parseError) { 588 parseError = &pe; 589 } 590 591 // validate 592 CollatorSpec s; 593 ucol_sit_readSpecs(&s, definition, parseError, status); 594 return ucol_sit_dumpSpecs(&s, destination, capacity, status); 595 } 596 597 /** 598 * Get a set containing the contractions defined by the collator. The set includes 599 * both the UCA contractions and the contractions defined by the collator 600 * @param coll collator 601 * @param conts the set to hold the result 602 * @param status to hold the error code 603 * @return the size of the contraction set 604 */ 605 U_CAPI int32_t U_EXPORT2 606 ucol_getContractions( const UCollator *coll, 607 USet *contractions, 608 UErrorCode *status) 609 { 610 ucol_getContractionsAndExpansions(coll, contractions, nullptr, false, status); 611 return uset_getItemCount(contractions); 612 } 613 614 /** 615 * Get a set containing the expansions defined by the collator. The set includes 616 * both the UCA expansions and the expansions defined by the tailoring 617 * @param coll collator 618 * @param conts the set to hold the result 619 * @param addPrefixes add the prefix contextual elements to contractions 620 * @param status to hold the error code 621 * 622 * @draft ICU 3.4 623 */ 624 U_CAPI void U_EXPORT2 625 ucol_getContractionsAndExpansions( const UCollator *coll, 626 USet *contractions, 627 USet *expansions, 628 UBool addPrefixes, 629 UErrorCode *status) 630 { 631 if(U_FAILURE(*status)) { 632 return; 633 } 634 if(coll == nullptr) { 635 *status = U_ILLEGAL_ARGUMENT_ERROR; 636 return; 637 } 638 const icu::RuleBasedCollator *rbc = icu::RuleBasedCollator::rbcFromUCollator(coll); 639 if(rbc == nullptr) { 640 *status = U_UNSUPPORTED_ERROR; 641 return; 642 } 643 rbc->internalGetContractionsAndExpansions( 644 icu::UnicodeSet::fromUSet(contractions), 645 icu::UnicodeSet::fromUSet(expansions), 646 addPrefixes, *status); 647 } 648 #endif