1 /* 2 ******************************************************************************* 3 * Copyright (C) 2004-2014, International Business Machines 4 * Corporation and others. All Rights Reserved. 5 ******************************************************************************* 6 * file name: ucol_sit.cpp 7 * encoding: US-ASCII 8 * tab size: 8 (not used) 9 * indentation:4 10 * 11 * Modification history 12 * Date Name Comments 13 * 03/12/2004 weiv Creation 14 */ 15 16 #include "unicode/ustring.h" 17 #include "unicode/udata.h" 18 #include "unicode/utf16.h" 19 #include "utracimp.h" 20 #include "ucol_imp.h" 21 #include "cmemory.h" 22 #include "cstring.h" 23 #include "uresimp.h" 24 #include "unicode/coll.h" 25 26 #ifdef UCOL_TRACE_SIT 27 # include <stdio.h> 28 #endif 29 30 #if !UCONFIG_NO_COLLATION 31 32 #include "unicode/tblcoll.h" 33 34 enum OptionsList { 35 UCOL_SIT_LANGUAGE = 0, 36 UCOL_SIT_SCRIPT = 1, 37 UCOL_SIT_REGION = 2, 38 UCOL_SIT_VARIANT = 3, 39 UCOL_SIT_KEYWORD = 4, 40 UCOL_SIT_PROVIDER = 5, 41 UCOL_SIT_LOCELEMENT_MAX = UCOL_SIT_PROVIDER, /* the last element that's part of LocElements */ 42 43 UCOL_SIT_BCP47, 44 UCOL_SIT_STRENGTH, 45 UCOL_SIT_CASE_LEVEL, 46 UCOL_SIT_CASE_FIRST, 47 UCOL_SIT_NUMERIC_COLLATION, 48 UCOL_SIT_ALTERNATE_HANDLING, 49 UCOL_SIT_NORMALIZATION_MODE, 50 UCOL_SIT_FRENCH_COLLATION, 51 UCOL_SIT_HIRAGANA_QUATERNARY, 52 UCOL_SIT_VARIABLE_TOP, 53 UCOL_SIT_VARIABLE_TOP_VALUE, 54 UCOL_SIT_ITEMS_COUNT 55 }; 56 57 /* option starters chars. */ 58 static const char alternateHArg = 'A'; 59 static const char variableTopValArg = 'B'; 60 static const char caseFirstArg = 'C'; 61 static const char numericCollArg = 'D'; 62 static const char caseLevelArg = 'E'; 63 static const char frenchCollArg = 'F'; 64 static const char hiraganaQArg = 'H'; 65 static const char keywordArg = 'K'; 66 static const char languageArg = 'L'; 67 static const char normArg = 'N'; 68 static const char providerArg = 'P'; 69 static const char regionArg = 'R'; 70 static const char strengthArg = 'S'; 71 static const char variableTopArg = 'T'; 72 static const char variantArg = 'V'; 73 static const char RFC3066Arg = 'X'; 74 static const char scriptArg = 'Z'; 75 76 static const char collationKeyword[] = "@collation="; 77 static const char providerKeyword[] = "@sp="; 78 79 80 static const int32_t locElementCount = UCOL_SIT_LOCELEMENT_MAX+1; 81 static const int32_t locElementCapacity = 32; 82 static const int32_t loc3066Capacity = 256; 83 static const int32_t locProviderCapacity = 10; 84 static const int32_t internalBufferSize = 512; 85 86 /* structure containing specification of a collator. Initialized 87 * from a short string. Also used to construct a short string from a 88 * collator instance 89 */ 90 struct CollatorSpec { 91 char locElements[locElementCount][locElementCapacity]; 92 char locale[loc3066Capacity]; 93 char provider[locProviderCapacity]; 94 UColAttributeValue options[UCOL_ATTRIBUTE_COUNT]; 95 uint32_t variableTopValue; 96 UChar variableTopString[locElementCapacity]; 97 int32_t variableTopStringLen; 98 UBool variableTopSet; 99 struct { 100 const char *start; 101 int32_t len; 102 } entries[UCOL_SIT_ITEMS_COUNT]; 103 }; 104 105 106 /* structure for converting between character attribute 107 * representation and real collation attribute value. 108 */ 109 struct AttributeConversion { 110 char letter; 111 UColAttributeValue value; 112 }; 113 114 static const AttributeConversion conversions[12] = { 115 { '1', UCOL_PRIMARY }, 116 { '2', UCOL_SECONDARY }, 117 { '3', UCOL_TERTIARY }, 118 { '4', UCOL_QUATERNARY }, 119 { 'D', UCOL_DEFAULT }, 120 { 'I', UCOL_IDENTICAL }, 121 { 'L', UCOL_LOWER_FIRST }, 122 { 'N', UCOL_NON_IGNORABLE }, 123 { 'O', UCOL_ON }, 124 { 'S', UCOL_SHIFTED }, 125 { 'U', UCOL_UPPER_FIRST }, 126 { 'X', UCOL_OFF } 127 }; 128 129 130 static UColAttributeValue 131 ucol_sit_letterToAttributeValue(char letter, UErrorCode *status) { 132 uint32_t i = 0; 133 for(i = 0; i < sizeof(conversions)/sizeof(conversions[0]); i++) { 134 if(conversions[i].letter == letter) { 135 return conversions[i].value; 136 } 137 } 138 *status = U_ILLEGAL_ARGUMENT_ERROR; 139 #ifdef UCOL_TRACE_SIT 140 fprintf(stderr, "%s:%d: unknown letter %c: %s\n", __FILE__, __LINE__, letter, u_errorName(*status)); 141 #endif 142 return UCOL_DEFAULT; 143 } 144 145 /* function prototype for functions used to parse a short string */ 146 U_CDECL_BEGIN 147 typedef const char* U_CALLCONV 148 ActionFunction(CollatorSpec *spec, uint32_t value1, const char* string, 149 UErrorCode *status); 150 U_CDECL_END 151 152 U_CDECL_BEGIN 153 static const char* U_CALLCONV 154 _processLocaleElement(CollatorSpec *spec, uint32_t value, const char* string, 155 UErrorCode *status) 156 { 157 int32_t len = 0; 158 do { 159 if(value == UCOL_SIT_LANGUAGE || value == UCOL_SIT_KEYWORD || value == UCOL_SIT_PROVIDER) { 160 spec->locElements[value][len++] = uprv_tolower(*string); 161 } else { 162 spec->locElements[value][len++] = *string; 163 } 164 } while(*(++string) != '_' && *string && len < locElementCapacity); 165 if(len >= locElementCapacity) { 166 *status = U_BUFFER_OVERFLOW_ERROR; 167 return string; 168 } 169 // don't skip the underscore at the end 170 return string; 171 } 172 U_CDECL_END 173 174 U_CDECL_BEGIN 175 static const char* U_CALLCONV 176 _processRFC3066Locale(CollatorSpec *spec, uint32_t, const char* string, 177 UErrorCode *status) 178 { 179 char terminator = *string; 180 string++; 181 const char *end = uprv_strchr(string+1, terminator); 182 if(end == NULL || end - string >= loc3066Capacity) { 183 *status = U_BUFFER_OVERFLOW_ERROR; 184 return string; 185 } else { 186 uprv_strncpy(spec->locale, string, end-string); 187 return end+1; 188 } 189 } 190 191 U_CDECL_END 192 193 U_CDECL_BEGIN 194 static const char* U_CALLCONV 195 _processCollatorOption(CollatorSpec *spec, uint32_t option, const char* string, 196 UErrorCode *status) 197 { 198 spec->options[option] = ucol_sit_letterToAttributeValue(*string, status); 199 if((*(++string) != '_' && *string) || U_FAILURE(*status)) { 200 #ifdef UCOL_TRACE_SIT 201 fprintf(stderr, "%s:%d: unknown collator option at '%s': %s\n", __FILE__, __LINE__, string, u_errorName(*status)); 202 #endif 203 *status = U_ILLEGAL_ARGUMENT_ERROR; 204 } 205 return string; 206 } 207 U_CDECL_END 208 209 210 static UChar 211 readHexCodeUnit(const char **string, UErrorCode *status) 212 { 213 UChar result = 0; 214 int32_t value = 0; 215 char c; 216 int32_t noDigits = 0; 217 while((c = **string) != 0 && noDigits < 4) { 218 if( c >= '0' && c <= '9') { 219 value = c - '0'; 220 } else if ( c >= 'a' && c <= 'f') { 221 value = c - 'a' + 10; 222 } else if ( c >= 'A' && c <= 'F') { 223 value = c - 'A' + 10; 224 } else { 225 *status = U_ILLEGAL_ARGUMENT_ERROR; 226 #ifdef UCOL_TRACE_SIT 227 fprintf(stderr, "%s:%d: Bad hex char at '%s': %s\n", __FILE__, __LINE__, *string, u_errorName(*status)); 228 #endif 229 return 0; 230 } 231 result = (result << 4) | (UChar)value; 232 noDigits++; 233 (*string)++; 234 } 235 // if the string was terminated before we read 4 digits, set an error 236 if(noDigits < 4) { 237 *status = U_ILLEGAL_ARGUMENT_ERROR; 238 #ifdef UCOL_TRACE_SIT 239 fprintf(stderr, "%s:%d: Short (only %d digits, wanted 4) at '%s': %s\n", __FILE__, __LINE__, noDigits,*string, u_errorName(*status)); 240 #endif 241 } 242 return result; 243 } 244 245 U_CDECL_BEGIN 246 static const char* U_CALLCONV 247 _processVariableTop(CollatorSpec *spec, uint32_t value1, const char* string, UErrorCode *status) 248 { 249 // get four digits 250 int32_t i = 0; 251 if(!value1) { 252 while(U_SUCCESS(*status) && i < locElementCapacity && *string != 0 && *string != '_') { 253 spec->variableTopString[i++] = readHexCodeUnit(&string, status); 254 } 255 spec->variableTopStringLen = i; 256 if(i == locElementCapacity && *string != 0 && *string != '_') { 257 *status = U_BUFFER_OVERFLOW_ERROR; 258 } 259 } else { 260 spec->variableTopValue = readHexCodeUnit(&string, status); 261 } 262 if(U_SUCCESS(*status)) { 263 spec->variableTopSet = TRUE; 264 } 265 return string; 266 } 267 U_CDECL_END 268 269 270 /* Table for parsing short strings */ 271 struct ShortStringOptions { 272 char optionStart; 273 ActionFunction *action; 274 uint32_t attr; 275 }; 276 277 static const ShortStringOptions options[UCOL_SIT_ITEMS_COUNT] = 278 { 279 /* 10 ALTERNATE_HANDLING */ {alternateHArg, _processCollatorOption, UCOL_ALTERNATE_HANDLING }, // alternate N, S, D 280 /* 15 VARIABLE_TOP_VALUE */ {variableTopValArg, _processVariableTop, 1 }, 281 /* 08 CASE_FIRST */ {caseFirstArg, _processCollatorOption, UCOL_CASE_FIRST }, // case first L, U, X, D 282 /* 09 NUMERIC_COLLATION */ {numericCollArg, _processCollatorOption, UCOL_NUMERIC_COLLATION }, // codan O, X, D 283 /* 07 CASE_LEVEL */ {caseLevelArg, _processCollatorOption, UCOL_CASE_LEVEL }, // case level O, X, D 284 /* 12 FRENCH_COLLATION */ {frenchCollArg, _processCollatorOption, UCOL_FRENCH_COLLATION }, // french O, X, D 285 /* 13 HIRAGANA_QUATERNARY] */ {hiraganaQArg, _processCollatorOption, UCOL_HIRAGANA_QUATERNARY_MODE }, // hiragana O, X, D 286 /* 04 KEYWORD */ {keywordArg, _processLocaleElement, UCOL_SIT_KEYWORD }, // keyword 287 /* 00 LANGUAGE */ {languageArg, _processLocaleElement, UCOL_SIT_LANGUAGE }, // language 288 /* 11 NORMALIZATION_MODE */ {normArg, _processCollatorOption, UCOL_NORMALIZATION_MODE }, // norm O, X, D 289 /* 02 REGION */ {regionArg, _processLocaleElement, UCOL_SIT_REGION }, // region 290 /* 06 STRENGTH */ {strengthArg, _processCollatorOption, UCOL_STRENGTH }, // strength 1, 2, 3, 4, I, D 291 /* 14 VARIABLE_TOP */ {variableTopArg, _processVariableTop, 0 }, 292 /* 03 VARIANT */ {variantArg, _processLocaleElement, UCOL_SIT_VARIANT }, // variant 293 /* 05 RFC3066BIS */ {RFC3066Arg, _processRFC3066Locale, 0 }, // rfc3066bis locale name 294 /* 01 SCRIPT */ {scriptArg, _processLocaleElement, UCOL_SIT_SCRIPT }, // script 295 /* PROVIDER */ {providerArg, _processLocaleElement, UCOL_SIT_PROVIDER } 296 }; 297 298 299 static 300 const char* ucol_sit_readOption(const char *start, CollatorSpec *spec, 301 UErrorCode *status) 302 { 303 int32_t i = 0; 304 305 for(i = 0; i < UCOL_SIT_ITEMS_COUNT; i++) { 306 if(*start == options[i].optionStart) { 307 spec->entries[i].start = start; 308 const char* end = options[i].action(spec, options[i].attr, start+1, status); 309 spec->entries[i].len = (int32_t)(end - start); 310 return end; 311 } 312 } 313 *status = U_ILLEGAL_ARGUMENT_ERROR; 314 #ifdef UCOL_TRACE_SIT 315 fprintf(stderr, "%s:%d: Unknown option at '%s': %s\n", __FILE__, __LINE__, start, u_errorName(*status)); 316 #endif 317 return start; 318 } 319 320 static 321 void ucol_sit_initCollatorSpecs(CollatorSpec *spec) 322 { 323 // reset everything 324 uprv_memset(spec, 0, sizeof(CollatorSpec)); 325 // set collation options to default 326 int32_t i = 0; 327 for(i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) { 328 spec->options[i] = UCOL_DEFAULT; 329 } 330 } 331 332 static const char* 333 ucol_sit_readSpecs(CollatorSpec *s, const char *string, 334 UParseError *parseError, UErrorCode *status) 335 { 336 const char *definition = string; 337 while(U_SUCCESS(*status) && *string) { 338 string = ucol_sit_readOption(string, s, status); 339 // advance over '_' 340 while(*string && *string == '_') { 341 string++; 342 } 343 } 344 if(U_FAILURE(*status)) { 345 parseError->offset = (int32_t)(string - definition); 346 } 347 return string; 348 } 349 350 static 351 int32_t ucol_sit_dumpSpecs(CollatorSpec *s, char *destination, int32_t capacity, UErrorCode *status) 352 { 353 int32_t i = 0, j = 0; 354 int32_t len = 0; 355 char optName; 356 if(U_SUCCESS(*status)) { 357 for(i = 0; i < UCOL_SIT_ITEMS_COUNT; i++) { 358 if(s->entries[i].start) { 359 if(len) { 360 if(len < capacity) { 361 uprv_strcat(destination, "_"); 362 } 363 len++; 364 } 365 optName = *(s->entries[i].start); 366 if(optName == languageArg || optName == regionArg || optName == variantArg || optName == keywordArg) { 367 for(j = 0; j < s->entries[i].len; j++) { 368 if(len + j < capacity) { 369 destination[len+j] = uprv_toupper(*(s->entries[i].start+j)); 370 } 371 } 372 len += s->entries[i].len; 373 } else { 374 len += s->entries[i].len; 375 if(len < capacity) { 376 uprv_strncat(destination,s->entries[i].start, s->entries[i].len); 377 } 378 } 379 } 380 } 381 return len; 382 } else { 383 return 0; 384 } 385 } 386 387 static void 388 ucol_sit_calculateWholeLocale(CollatorSpec *s) { 389 // put the locale together, unless we have a done 390 // locale 391 if(s->locale[0] == 0) { 392 // first the language 393 uprv_strcat(s->locale, s->locElements[UCOL_SIT_LANGUAGE]); 394 // then the script, if present 395 if(*(s->locElements[UCOL_SIT_SCRIPT])) { 396 uprv_strcat(s->locale, "_"); 397 uprv_strcat(s->locale, s->locElements[UCOL_SIT_SCRIPT]); 398 } 399 // then the region, if present 400 if(*(s->locElements[UCOL_SIT_REGION])) { 401 uprv_strcat(s->locale, "_"); 402 uprv_strcat(s->locale, s->locElements[UCOL_SIT_REGION]); 403 } else if(*(s->locElements[UCOL_SIT_VARIANT])) { // if there is a variant, we need an underscore 404 uprv_strcat(s->locale, "_"); 405 } 406 // add variant, if there 407 if(*(s->locElements[UCOL_SIT_VARIANT])) { 408 uprv_strcat(s->locale, "_"); 409 uprv_strcat(s->locale, s->locElements[UCOL_SIT_VARIANT]); 410 } 411 412 // if there is a collation keyword, add that too 413 if(*(s->locElements[UCOL_SIT_KEYWORD])) { 414 uprv_strcat(s->locale, collationKeyword); 415 uprv_strcat(s->locale, s->locElements[UCOL_SIT_KEYWORD]); 416 } 417 418 // if there is a provider keyword, add that too 419 if(*(s->locElements[UCOL_SIT_PROVIDER])) { 420 uprv_strcat(s->locale, providerKeyword); 421 uprv_strcat(s->locale, s->locElements[UCOL_SIT_PROVIDER]); 422 } 423 } 424 } 425 426 427 U_CAPI void U_EXPORT2 428 ucol_prepareShortStringOpen( const char *definition, 429 UBool, 430 UParseError *parseError, 431 UErrorCode *status) 432 { 433 if(U_FAILURE(*status)) return; 434 435 UParseError internalParseError; 436 437 if(!parseError) { 438 parseError = &internalParseError; 439 } 440 parseError->line = 0; 441 parseError->offset = 0; 442 parseError->preContext[0] = 0; 443 parseError->postContext[0] = 0; 444 445 446 // first we want to pick stuff out of short string. 447 // we'll end up with an UCA version, locale and a bunch of 448 // settings 449 450 // analyse the string in order to get everything we need. 451 CollatorSpec s; 452 ucol_sit_initCollatorSpecs(&s); 453 ucol_sit_readSpecs(&s, definition, parseError, status); 454 ucol_sit_calculateWholeLocale(&s); 455 456 char buffer[internalBufferSize]; 457 uprv_memset(buffer, 0, internalBufferSize); 458 uloc_canonicalize(s.locale, buffer, internalBufferSize, status); 459 460 UResourceBundle *b = ures_open(U_ICUDATA_COLL, buffer, status); 461 /* we try to find stuff from keyword */ 462 UResourceBundle *collations = ures_getByKey(b, "collations", NULL, status); 463 UResourceBundle *collElem = NULL; 464 char keyBuffer[256]; 465 // if there is a keyword, we pick it up and try to get elements 466 if(!uloc_getKeywordValue(buffer, "collation", keyBuffer, 256, status)) { 467 // no keyword. we try to find the default setting, which will give us the keyword value 468 UResourceBundle *defaultColl = ures_getByKeyWithFallback(collations, "default", NULL, status); 469 if(U_SUCCESS(*status)) { 470 int32_t defaultKeyLen = 0; 471 const UChar *defaultKey = ures_getString(defaultColl, &defaultKeyLen, status); 472 u_UCharsToChars(defaultKey, keyBuffer, defaultKeyLen); 473 keyBuffer[defaultKeyLen] = 0; 474 } else { 475 *status = U_INTERNAL_PROGRAM_ERROR; 476 return; 477 } 478 ures_close(defaultColl); 479 } 480 collElem = ures_getByKeyWithFallback(collations, keyBuffer, collElem, status); 481 ures_close(collElem); 482 ures_close(collations); 483 ures_close(b); 484 } 485 486 487 U_CAPI UCollator* U_EXPORT2 488 ucol_openFromShortString( const char *definition, 489 UBool forceDefaults, 490 UParseError *parseError, 491 UErrorCode *status) 492 { 493 UTRACE_ENTRY_OC(UTRACE_UCOL_OPEN_FROM_SHORT_STRING); 494 UTRACE_DATA1(UTRACE_INFO, "short string = \"%s\"", definition); 495 496 if(U_FAILURE(*status)) return 0; 497 498 UParseError internalParseError; 499 500 if(!parseError) { 501 parseError = &internalParseError; 502 } 503 parseError->line = 0; 504 parseError->offset = 0; 505 parseError->preContext[0] = 0; 506 parseError->postContext[0] = 0; 507 508 509 // first we want to pick stuff out of short string. 510 // we'll end up with an UCA version, locale and a bunch of 511 // settings 512 513 // analyse the string in order to get everything we need. 514 const char *string = definition; 515 CollatorSpec s; 516 ucol_sit_initCollatorSpecs(&s); 517 string = ucol_sit_readSpecs(&s, definition, parseError, status); 518 ucol_sit_calculateWholeLocale(&s); 519 520 char buffer[internalBufferSize]; 521 uprv_memset(buffer, 0, internalBufferSize); 522 uloc_canonicalize(s.locale, buffer, internalBufferSize, status); 523 524 UCollator *result = ucol_open(buffer, status); 525 int32_t i = 0; 526 527 for(i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) { 528 if(s.options[i] != UCOL_DEFAULT) { 529 if(forceDefaults || ucol_getAttribute(result, (UColAttribute)i, status) != s.options[i]) { 530 ucol_setAttribute(result, (UColAttribute)i, s.options[i], status); 531 } 532 533 if(U_FAILURE(*status)) { 534 parseError->offset = (int32_t)(string - definition); 535 ucol_close(result); 536 return NULL; 537 } 538 539 } 540 } 541 if(s.variableTopSet) { 542 if(s.variableTopString[0]) { 543 ucol_setVariableTop(result, s.variableTopString, s.variableTopStringLen, status); 544 } else { // we set by value, using 'B' 545 ucol_restoreVariableTop(result, s.variableTopValue, status); 546 } 547 } 548 549 550 if(U_FAILURE(*status)) { // here it can only be a bogus value 551 ucol_close(result); 552 result = NULL; 553 } 554 555 UTRACE_EXIT_PTR_STATUS(result, *status); 556 return result; 557 } 558 559 560 U_CAPI int32_t U_EXPORT2 561 ucol_getShortDefinitionString(const UCollator *coll, 562 const char *locale, 563 char *dst, 564 int32_t capacity, 565 UErrorCode *status) 566 { 567 if(U_FAILURE(*status)) return 0; 568 if(coll == NULL) { 569 *status = U_ILLEGAL_ARGUMENT_ERROR; 570 return 0; 571 } 572 return ((icu::Collator*)coll)->internalGetShortDefinitionString(locale,dst,capacity,*status); 573 } 574 575 U_CAPI int32_t U_EXPORT2 576 ucol_normalizeShortDefinitionString(const char *definition, 577 char *destination, 578 int32_t capacity, 579 UParseError *parseError, 580 UErrorCode *status) 581 { 582 583 if(U_FAILURE(*status)) { 584 return 0; 585 } 586 587 if(destination) { 588 uprv_memset(destination, 0, capacity*sizeof(char)); 589 } 590 591 UParseError pe; 592 if(!parseError) { 593 parseError = &pe; 594 } 595 596 // validate 597 CollatorSpec s; 598 ucol_sit_initCollatorSpecs(&s); 599 ucol_sit_readSpecs(&s, definition, parseError, status); 600 return ucol_sit_dumpSpecs(&s, destination, capacity, status); 601 } 602 603 /** 604 * Get a set containing the contractions defined by the collator. The set includes 605 * both the UCA contractions and the contractions defined by the collator 606 * @param coll collator 607 * @param conts the set to hold the result 608 * @param status to hold the error code 609 * @return the size of the contraction set 610 */ 611 U_CAPI int32_t U_EXPORT2 612 ucol_getContractions( const UCollator *coll, 613 USet *contractions, 614 UErrorCode *status) 615 { 616 ucol_getContractionsAndExpansions(coll, contractions, NULL, FALSE, status); 617 return uset_getItemCount(contractions); 618 } 619 620 /** 621 * Get a set containing the expansions defined by the collator. The set includes 622 * both the UCA expansions and the expansions defined by the tailoring 623 * @param coll collator 624 * @param conts the set to hold the result 625 * @param addPrefixes add the prefix contextual elements to contractions 626 * @param status to hold the error code 627 * 628 * @draft ICU 3.4 629 */ 630 U_CAPI void U_EXPORT2 631 ucol_getContractionsAndExpansions( const UCollator *coll, 632 USet *contractions, 633 USet *expansions, 634 UBool addPrefixes, 635 UErrorCode *status) 636 { 637 if(U_FAILURE(*status)) { 638 return; 639 } 640 if(coll == NULL) { 641 *status = U_ILLEGAL_ARGUMENT_ERROR; 642 return; 643 } 644 const icu::RuleBasedCollator *rbc = icu::RuleBasedCollator::rbcFromUCollator(coll); 645 if(rbc == NULL) { 646 *status = U_UNSUPPORTED_ERROR; 647 return; 648 } 649 rbc->internalGetContractionsAndExpansions( 650 icu::UnicodeSet::fromUSet(contractions), 651 icu::UnicodeSet::fromUSet(expansions), 652 addPrefixes, *status); 653 } 654 #endif 655
