src/third_party/icu/source/i18n/udat.cpp

   1 /*
   2 *******************************************************************************
   3 *   Copyright (C) 1996-2013, International Business Machines
   4 *   Corporation and others.  All Rights Reserved.
   5 *******************************************************************************
   6 */
   7
   8 #include "unicode/utypes.h"
   9
  10 #if !UCONFIG_NO_FORMATTING
  11
  12 #include "unicode/udat.h"
  13
  14 #include "unicode/uloc.h"
  15 #include "unicode/datefmt.h"
  16 #include "unicode/timezone.h"
  17 #include "unicode/smpdtfmt.h"
  18 #include "unicode/fieldpos.h"
  19 #include "unicode/parsepos.h"
  20 #include "unicode/calendar.h"
  21 #include "unicode/numfmt.h"
  22 #include "unicode/dtfmtsym.h"
  23 #include "unicode/ustring.h"
  24 #include "unicode/udisplaycontext.h"
  25 #include "cpputils.h"
  26 #include "reldtfmt.h"
  27 #include "umutex.h"
  28
  29 U_NAMESPACE_USE
  30
  31 /**
  32  * Verify that fmt is a SimpleDateFormat. Invalid error if not.
  33  * @param fmt the UDateFormat, definitely a DateFormat, maybe something else
  34  * @param status error code, will be set to failure if there is a familure or the fmt is NULL.
  35  */
  36 static void verifyIsSimpleDateFormat(const UDateFormat* fmt, UErrorCode *status) {
  37    if(U_SUCCESS(*status) &&
  38        dynamic_cast<const SimpleDateFormat*>(reinterpret_cast<const DateFormat*>(fmt))==NULL) {
  39        *status = U_ILLEGAL_ARGUMENT_ERROR;
  40    }
  41 }
  42
  43 // This mirrors the correspondence between the
  44 // SimpleDateFormat::fgPatternIndexToDateFormatField and
  45 // SimpleDateFormat::fgPatternIndexToCalendarField arrays.
  46 static UCalendarDateFields gDateFieldMapping[] = {
  47     UCAL_ERA,                  // UDAT_ERA_FIELD = 0
  48     UCAL_YEAR,                 // UDAT_YEAR_FIELD = 1
  49     UCAL_MONTH,                // UDAT_MONTH_FIELD = 2
  50     UCAL_DATE,                 // UDAT_DATE_FIELD = 3
  51     UCAL_HOUR_OF_DAY,          // UDAT_HOUR_OF_DAY1_FIELD = 4
  52     UCAL_HOUR_OF_DAY,          // UDAT_HOUR_OF_DAY0_FIELD = 5
  53     UCAL_MINUTE,               // UDAT_MINUTE_FIELD = 6
  54     UCAL_SECOND,               // UDAT_SECOND_FIELD = 7
  55     UCAL_MILLISECOND,          // UDAT_FRACTIONAL_SECOND_FIELD = 8
  56     UCAL_DAY_OF_WEEK,          // UDAT_DAY_OF_WEEK_FIELD = 9
  57     UCAL_DAY_OF_YEAR,          // UDAT_DAY_OF_YEAR_FIELD = 10
  58     UCAL_DAY_OF_WEEK_IN_MONTH, // UDAT_DAY_OF_WEEK_IN_MONTH_FIELD = 11
  59     UCAL_WEEK_OF_YEAR,         // UDAT_WEEK_OF_YEAR_FIELD = 12
  60     UCAL_WEEK_OF_MONTH,        // UDAT_WEEK_OF_MONTH_FIELD = 13
  61     UCAL_AM_PM,                // UDAT_AM_PM_FIELD = 14
  62     UCAL_HOUR,                 // UDAT_HOUR1_FIELD = 15
  63     UCAL_HOUR,                 // UDAT_HOUR0_FIELD = 16
  64     UCAL_ZONE_OFFSET,          // UDAT_TIMEZONE_FIELD = 17
  65     UCAL_YEAR_WOY,             // UDAT_YEAR_WOY_FIELD = 18
  66     UCAL_DOW_LOCAL,            // UDAT_DOW_LOCAL_FIELD = 19
  67     UCAL_EXTENDED_YEAR,        // UDAT_EXTENDED_YEAR_FIELD = 20
  68     UCAL_JULIAN_DAY,           // UDAT_JULIAN_DAY_FIELD = 21
  69     UCAL_MILLISECONDS_IN_DAY,  // UDAT_MILLISECONDS_IN_DAY_FIELD = 22
  70     UCAL_ZONE_OFFSET,          // UDAT_TIMEZONE_RFC_FIELD = 23
  71     // UCAL_DST_OFFSET also
  72     UCAL_ZONE_OFFSET,          // UDAT_TIMEZONE_GENERIC_FIELD = 24
  73     UCAL_DOW_LOCAL,            // UDAT_STANDALONE_DAY_FIELD = 25
  74     UCAL_MONTH,                // UDAT_STANDALONE_MONTH_FIELD = 26
  75     UCAL_MONTH,                // UDAT_QUARTER_FIELD = 27
  76     UCAL_MONTH,                // UDAT_STANDALONE_QUARTER_FIELD = 28
  77     UCAL_ZONE_OFFSET,          // UDAT_TIMEZONE_SPECIAL_FIELD = 29
  78     UCAL_YEAR,                 // UDAT_YEAR_NAME_FIELD = 30
  79     UCAL_FIELD_COUNT,          // UDAT_FIELD_COUNT = 31
  80     // UCAL_IS_LEAP_MONTH is not the target of a mapping
  81 };
  82
  83 U_CAPI UCalendarDateFields U_EXPORT2
  84 udat_toCalendarDateField(UDateFormatField field) {
  85   return gDateFieldMapping[field];
  86 }
  87
  88 /* For now- one opener. */
  89 static UDateFormatOpener gOpener = NULL;
  90
  91 U_INTERNAL void U_EXPORT2
  92 udat_registerOpener(UDateFormatOpener opener, UErrorCode *status)
  93 {
  94   if(U_FAILURE(*status)) return;
  95   umtx_lock(NULL);
  96   if(gOpener==NULL) {
  97     gOpener = opener;
  98   } else {
  99     *status = U_ILLEGAL_ARGUMENT_ERROR;
 100   }
 101   umtx_unlock(NULL);
 102 }
 103
 104 U_INTERNAL UDateFormatOpener U_EXPORT2
 105 udat_unregisterOpener(UDateFormatOpener opener, UErrorCode *status)
 106 {
 107   if(U_FAILURE(*status)) return NULL;
 108   UDateFormatOpener oldOpener = NULL;
 109   umtx_lock(NULL);
 110   if(gOpener==NULL || gOpener!=opener) {
 111     *status = U_ILLEGAL_ARGUMENT_ERROR;
 112   } else {
 113     oldOpener=gOpener;
 114     gOpener=NULL;
 115   }
 116   umtx_unlock(NULL);
 117   return oldOpener;
 118 }
 119
 120
 121
 122 U_CAPI UDateFormat* U_EXPORT2
 123 udat_open(UDateFormatStyle  timeStyle,
 124           UDateFormatStyle  dateStyle,
 125           const char        *locale,
 126           const UChar       *tzID,
 127           int32_t           tzIDLength,
 128           const UChar       *pattern,
 129           int32_t           patternLength,
 130           UErrorCode        *status)
 131 {
 132     DateFormat *fmt;
 133     if(U_FAILURE(*status)) {
 134         return 0;
 135     }
 136     if(gOpener!=NULL) { // if it's registered
 137       fmt = (DateFormat*) (*gOpener)(timeStyle,dateStyle,locale,tzID,tzIDLength,pattern,patternLength,status);
 138       if(fmt!=NULL) {
 139         return (UDateFormat*)fmt;
 140       } // else fall through.
 141     }
 142     if(timeStyle != UDAT_PATTERN) {
 143         if(locale == 0) {
 144             fmt = DateFormat::createDateTimeInstance((DateFormat::EStyle)dateStyle,
 145                 (DateFormat::EStyle)timeStyle);
 146         }
 147         else {
 148             fmt = DateFormat::createDateTimeInstance((DateFormat::EStyle)dateStyle,
 149                 (DateFormat::EStyle)timeStyle,
 150                 Locale(locale));
 151         }
 152     }
 153     else {
 154         UnicodeString pat((UBool)(patternLength == -1), pattern, patternLength);
 155
 156         if(locale == 0) {
 157             fmt = new SimpleDateFormat(pat, *status);
 158         }
 159         else {
 160             fmt = new SimpleDateFormat(pat, Locale(locale), *status);
 161         }
 162     }
 163
 164     if(fmt == 0) {
 165         *status = U_MEMORY_ALLOCATION_ERROR;
 166         return 0;
 167     }
 168
 169     if(tzID != 0) {
 170         TimeZone *zone = TimeZone::createTimeZone(UnicodeString((UBool)(tzIDLength == -1), tzID, tzIDLength));
 171         if(zone == 0) {
 172             *status = U_MEMORY_ALLOCATION_ERROR;
 173             delete fmt;
 174             return 0;
 175         }
 176         fmt->adoptTimeZone(zone);
 177     }
 178
 179     return (UDateFormat*)fmt;
 180 }
 181
 182
 183 U_CAPI void U_EXPORT2
 184 udat_close(UDateFormat* format)
 185 {
 186     delete (DateFormat*)format;
 187 }
 188
 189 U_CAPI UDateFormat* U_EXPORT2
 190 udat_clone(const UDateFormat *fmt,
 191        UErrorCode *status)
 192 {
 193     if(U_FAILURE(*status)) return 0;
 194
 195     Format *res = ((DateFormat*)fmt)->clone();
 196
 197     if(res == 0) {
 198         *status = U_MEMORY_ALLOCATION_ERROR;
 199         return 0;
 200     }
 201
 202     return (UDateFormat*) res;
 203 }
 204
 205 U_CAPI int32_t U_EXPORT2
 206 udat_format(    const    UDateFormat*    format,
 207         UDate           dateToFormat,
 208         UChar*          result,
 209         int32_t         resultLength,
 210         UFieldPosition* position,
 211         UErrorCode*     status)
 212 {
 213     if(U_FAILURE(*status)) return -1;
 214
 215     UnicodeString res;
 216     if(!(result==NULL && resultLength==0)) {
 217         // NULL destination for pure preflighting: empty dummy string
 218         // otherwise, alias the destination buffer
 219         res.setTo(result, 0, resultLength);
 220     }
 221
 222     FieldPosition fp;
 223
 224     if(position != 0)
 225         fp.setField(position->field);
 226
 227     ((DateFormat*)format)->format(dateToFormat, res, fp);
 228
 229     if(position != 0) {
 230         position->beginIndex = fp.getBeginIndex();
 231         position->endIndex = fp.getEndIndex();
 232     }
 233
 234     return res.extract(result, resultLength, *status);
 235 }
 236
 237 U_CAPI UDate U_EXPORT2
 238 udat_parse(    const    UDateFormat*        format,
 239         const    UChar*          text,
 240         int32_t         textLength,
 241         int32_t         *parsePos,
 242         UErrorCode      *status)
 243 {
 244     if(U_FAILURE(*status)) return (UDate)0;
 245
 246     const UnicodeString src((UBool)(textLength == -1), text, textLength);
 247     ParsePosition pp;
 248     int32_t stackParsePos = 0;
 249     UDate res;
 250
 251     if(parsePos == NULL) {
 252         parsePos = &stackParsePos;
 253     }
 254
 255     pp.setIndex(*parsePos);
 256
 257     res = ((DateFormat*)format)->parse(src, pp);
 258
 259     if(pp.getErrorIndex() == -1)
 260         *parsePos = pp.getIndex();
 261     else {
 262         *parsePos = pp.getErrorIndex();
 263         *status = U_PARSE_ERROR;
 264     }
 265
 266     return res;
 267 }
 268
 269 U_CAPI void U_EXPORT2
 270 udat_parseCalendar(const    UDateFormat*    format,
 271                             UCalendar*      calendar,
 272                    const    UChar*          text,
 273                             int32_t         textLength,
 274                             int32_t         *parsePos,
 275                             UErrorCode      *status)
 276 {
 277     if(U_FAILURE(*status)) return;
 278
 279     const UnicodeString src((UBool)(textLength == -1), text, textLength);
 280     ParsePosition pp;
 281
 282     if(parsePos != 0)
 283         pp.setIndex(*parsePos);
 284
 285     ((DateFormat*)format)->parse(src, *(Calendar*)calendar, pp);
 286
 287     if(parsePos != 0) {
 288         if(pp.getErrorIndex() == -1)
 289             *parsePos = pp.getIndex();
 290         else {
 291             *parsePos = pp.getErrorIndex();
 292             *status = U_PARSE_ERROR;
 293         }
 294     }
 295 }
 296
 297 U_CAPI UBool U_EXPORT2
 298 udat_isLenient(const UDateFormat* fmt)
 299 {
 300     return ((DateFormat*)fmt)->isLenient();
 301 }
 302
 303 U_CAPI void U_EXPORT2
 304 udat_setLenient(    UDateFormat*    fmt,
 305             UBool          isLenient)
 306 {
 307     ((DateFormat*)fmt)->setLenient(isLenient);
 308 }
 309
 310 U_CAPI const UCalendar* U_EXPORT2
 311 udat_getCalendar(const UDateFormat* fmt)
 312 {
 313     return (const UCalendar*) ((DateFormat*)fmt)->getCalendar();
 314 }
 315
 316 U_CAPI void U_EXPORT2
 317 udat_setCalendar(UDateFormat*    fmt,
 318                  const   UCalendar*      calendarToSet)
 319 {
 320     ((DateFormat*)fmt)->setCalendar(*((Calendar*)calendarToSet));
 321 }
 322
 323 U_CAPI const UNumberFormat* U_EXPORT2
 324 udat_getNumberFormat(const UDateFormat* fmt)
 325 {
 326     return (const UNumberFormat*) ((DateFormat*)fmt)->getNumberFormat();
 327 }
 328
 329 U_CAPI void U_EXPORT2
 330 udat_setNumberFormat(UDateFormat*    fmt,
 331                      const   UNumberFormat*  numberFormatToSet)
 332 {
 333     ((DateFormat*)fmt)->setNumberFormat(*((NumberFormat*)numberFormatToSet));
 334 }
 335
 336 U_CAPI const char* U_EXPORT2
 337 udat_getAvailable(int32_t index)
 338 {
 339     return uloc_getAvailable(index);
 340 }
 341
 342 U_CAPI int32_t U_EXPORT2
 343 udat_countAvailable()
 344 {
 345     return uloc_countAvailable();
 346 }
 347
 348 U_CAPI UDate U_EXPORT2
 349 udat_get2DigitYearStart(    const   UDateFormat     *fmt,
 350                         UErrorCode      *status)
 351 {
 352     verifyIsSimpleDateFormat(fmt, status);
 353     if(U_FAILURE(*status)) return (UDate)0;
 354     return ((SimpleDateFormat*)fmt)->get2DigitYearStart(*status);
 355 }
 356
 357 U_CAPI void U_EXPORT2
 358 udat_set2DigitYearStart(    UDateFormat     *fmt,
 359                         UDate           d,
 360                         UErrorCode      *status)
 361 {
 362     verifyIsSimpleDateFormat(fmt, status);
 363     if(U_FAILURE(*status)) return;
 364     ((SimpleDateFormat*)fmt)->set2DigitYearStart(d, *status);
 365 }
 366
 367 U_CAPI int32_t U_EXPORT2
 368 udat_toPattern(    const   UDateFormat     *fmt,
 369         UBool          localized,
 370         UChar           *result,
 371         int32_t         resultLength,
 372         UErrorCode      *status)
 373 {
 374     if(U_FAILURE(*status)) return -1;
 375
 376     UnicodeString res;
 377     if(!(result==NULL && resultLength==0)) {
 378         // NULL destination for pure preflighting: empty dummy string
 379         // otherwise, alias the destination buffer
 380         res.setTo(result, 0, resultLength);
 381     }
 382
 383     const DateFormat *df=reinterpret_cast<const DateFormat *>(fmt);
 384     const SimpleDateFormat *sdtfmt=dynamic_cast<const SimpleDateFormat *>(df);
 385     const RelativeDateFormat *reldtfmt;
 386     if (sdtfmt!=NULL) {
 387         if(localized)
 388             sdtfmt->toLocalizedPattern(res, *status);
 389         else
 390             sdtfmt->toPattern(res);
 391     } else if (!localized && (reldtfmt=dynamic_cast<const RelativeDateFormat *>(df))!=NULL) {
 392         reldtfmt->toPattern(res, *status);
 393     } else {
 394         *status = U_ILLEGAL_ARGUMENT_ERROR;
 395         return -1;
 396     }
 397
 398     return res.extract(result, resultLength, *status);
 399 }
 400
 401 // TODO: should this take an UErrorCode?
 402 // A: Yes. Of course.
 403 U_CAPI void U_EXPORT2
 404 udat_applyPattern(  UDateFormat     *format,
 405                     UBool          localized,
 406                     const   UChar           *pattern,
 407                     int32_t         patternLength)
 408 {
 409     const UnicodeString pat((UBool)(patternLength == -1), pattern, patternLength);
 410     UErrorCode status = U_ZERO_ERROR;
 411
 412     verifyIsSimpleDateFormat(format, &status);
 413     if(U_FAILURE(status)) {
 414         return;
 415     }
 416
 417     if(localized)
 418         ((SimpleDateFormat*)format)->applyLocalizedPattern(pat, status);
 419     else
 420         ((SimpleDateFormat*)format)->applyPattern(pat);
 421 }
 422
 423 U_CAPI int32_t U_EXPORT2
 424 udat_getSymbols(const   UDateFormat     *fmt,
 425                 UDateFormatSymbolType   type,
 426                 int32_t                 index,
 427                 UChar                   *result,
 428                 int32_t                 resultLength,
 429                 UErrorCode              *status)
 430 {
 431     const DateFormatSymbols *syms;
 432     const SimpleDateFormat* sdtfmt;
 433     const RelativeDateFormat* rdtfmt;
 434     if ((sdtfmt = dynamic_cast<const SimpleDateFormat*>(reinterpret_cast<const DateFormat*>(fmt))) != NULL) {
 435         syms = sdtfmt->getDateFormatSymbols();
 436     } else if ((rdtfmt = dynamic_cast<const RelativeDateFormat*>(reinterpret_cast<const DateFormat*>(fmt))) != NULL) {
 437         syms = rdtfmt->getDateFormatSymbols();
 438     } else {
 439         return -1;
 440     }
 441     int32_t count;
 442     const UnicodeString *res = NULL;
 443
 444     switch(type) {
 445     case UDAT_ERAS:
 446         res = syms->getEras(count);
 447         break;
 448
 449     case UDAT_ERA_NAMES:
 450         res = syms->getEraNames(count);
 451         break;
 452
 453     case UDAT_MONTHS:
 454         res = syms->getMonths(count);
 455         break;
 456
 457     case UDAT_SHORT_MONTHS:
 458         res = syms->getShortMonths(count);
 459         break;
 460
 461     case UDAT_WEEKDAYS:
 462         res = syms->getWeekdays(count);
 463         break;
 464
 465     case UDAT_SHORT_WEEKDAYS:
 466         res = syms->getShortWeekdays(count);
 467         break;
 468
 469     case UDAT_AM_PMS:
 470         res = syms->getAmPmStrings(count);
 471         break;
 472
 473     case UDAT_LOCALIZED_CHARS:
 474         {
 475             UnicodeString res1;
 476             if(!(result==NULL && resultLength==0)) {
 477                 // NULL destination for pure preflighting: empty dummy string
 478                 // otherwise, alias the destination buffer
 479                 res1.setTo(result, 0, resultLength);
 480             }
 481             syms->getLocalPatternChars(res1);
 482             return res1.extract(result, resultLength, *status);
 483         }
 484
 485     case UDAT_NARROW_MONTHS:
 486         res = syms->getMonths(count, DateFormatSymbols::FORMAT, DateFormatSymbols::NARROW);
 487         break;
 488
 489     case UDAT_SHORTER_WEEKDAYS:
 490         res = syms->getWeekdays(count, DateFormatSymbols::FORMAT, DateFormatSymbols::SHORT);
 491         break;
 492
 493     case UDAT_NARROW_WEEKDAYS:
 494         res = syms->getWeekdays(count, DateFormatSymbols::FORMAT, DateFormatSymbols::NARROW);
 495         break;
 496
 497     case UDAT_STANDALONE_MONTHS:
 498         res = syms->getMonths(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::WIDE);
 499         break;
 500
 501     case UDAT_STANDALONE_SHORT_MONTHS:
 502         res = syms->getMonths(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::ABBREVIATED);
 503         break;
 504
 505     case UDAT_STANDALONE_NARROW_MONTHS:
 506         res = syms->getMonths(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::NARROW);
 507         break;
 508
 509     case UDAT_STANDALONE_WEEKDAYS:
 510         res = syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::WIDE);
 511         break;
 512
 513     case UDAT_STANDALONE_SHORT_WEEKDAYS:
 514         res = syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::ABBREVIATED);
 515         break;
 516
 517     case UDAT_STANDALONE_SHORTER_WEEKDAYS:
 518         res = syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::SHORT);
 519         break;
 520
 521     case UDAT_STANDALONE_NARROW_WEEKDAYS:
 522         res = syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::NARROW);
 523         break;
 524
 525     case UDAT_QUARTERS:
 526         res = syms->getQuarters(count, DateFormatSymbols::FORMAT, DateFormatSymbols::WIDE);
 527         break;
 528
 529     case UDAT_SHORT_QUARTERS:
 530         res = syms->getQuarters(count, DateFormatSymbols::FORMAT, DateFormatSymbols::ABBREVIATED);
 531         break;
 532
 533     case UDAT_STANDALONE_QUARTERS:
 534         res = syms->getQuarters(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::WIDE);
 535         break;
 536
 537     case UDAT_STANDALONE_SHORT_QUARTERS:
 538         res = syms->getQuarters(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::ABBREVIATED);
 539         break;
 540
 541     }
 542
 543     if(index < count) {
 544         return res[index].extract(result, resultLength, *status);
 545     }
 546     return 0;
 547 }
 548
 549 // TODO: also needs an errorCode.
 550 U_CAPI int32_t U_EXPORT2
 551 udat_countSymbols(    const    UDateFormat                *fmt,
 552             UDateFormatSymbolType    type)
 553 {
 554     const DateFormatSymbols *syms;
 555     const SimpleDateFormat* sdtfmt;
 556     const RelativeDateFormat* rdtfmt;
 557     if ((sdtfmt = dynamic_cast<const SimpleDateFormat*>(reinterpret_cast<const DateFormat*>(fmt))) != NULL) {
 558         syms = sdtfmt->getDateFormatSymbols();
 559     } else if ((rdtfmt = dynamic_cast<const RelativeDateFormat*>(reinterpret_cast<const DateFormat*>(fmt))) != NULL) {
 560         syms = rdtfmt->getDateFormatSymbols();
 561     } else {
 562         return 0;
 563     }
 564     int32_t count = 0;
 565
 566     switch(type) {
 567     case UDAT_ERAS:
 568         syms->getEras(count);
 569         break;
 570
 571     case UDAT_MONTHS:
 572         syms->getMonths(count);
 573         break;
 574
 575     case UDAT_SHORT_MONTHS:
 576         syms->getShortMonths(count);
 577         break;
 578
 579     case UDAT_WEEKDAYS:
 580         syms->getWeekdays(count);
 581         break;
 582
 583     case UDAT_SHORT_WEEKDAYS:
 584         syms->getShortWeekdays(count);
 585         break;
 586
 587     case UDAT_AM_PMS:
 588         syms->getAmPmStrings(count);
 589         break;
 590
 591     case UDAT_LOCALIZED_CHARS:
 592         count = 1;
 593         break;
 594
 595     case UDAT_ERA_NAMES:
 596         syms->getEraNames(count);
 597         break;
 598
 599     case UDAT_NARROW_MONTHS:
 600         syms->getMonths(count, DateFormatSymbols::FORMAT, DateFormatSymbols::NARROW);
 601         break;
 602
 603     case UDAT_SHORTER_WEEKDAYS:
 604         syms->getWeekdays(count, DateFormatSymbols::FORMAT, DateFormatSymbols::SHORT);
 605         break;
 606
 607     case UDAT_NARROW_WEEKDAYS:
 608         syms->getWeekdays(count, DateFormatSymbols::FORMAT, DateFormatSymbols::NARROW);
 609         break;
 610
 611     case UDAT_STANDALONE_MONTHS:
 612         syms->getMonths(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::WIDE);
 613         break;
 614
 615     case UDAT_STANDALONE_SHORT_MONTHS:
 616         syms->getMonths(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::ABBREVIATED);
 617         break;
 618
 619     case UDAT_STANDALONE_NARROW_MONTHS:
 620         syms->getMonths(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::NARROW);
 621         break;
 622
 623     case UDAT_STANDALONE_WEEKDAYS:
 624         syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::WIDE);
 625         break;
 626
 627     case UDAT_STANDALONE_SHORT_WEEKDAYS:
 628         syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::ABBREVIATED);
 629         break;
 630
 631     case UDAT_STANDALONE_SHORTER_WEEKDAYS:
 632         syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::SHORT);
 633         break;
 634
 635     case UDAT_STANDALONE_NARROW_WEEKDAYS:
 636         syms->getWeekdays(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::NARROW);
 637         break;
 638
 639     case UDAT_QUARTERS:
 640         syms->getQuarters(count, DateFormatSymbols::FORMAT, DateFormatSymbols::WIDE);
 641         break;
 642
 643     case UDAT_SHORT_QUARTERS:
 644         syms->getQuarters(count, DateFormatSymbols::FORMAT, DateFormatSymbols::ABBREVIATED);
 645         break;
 646
 647     case UDAT_STANDALONE_QUARTERS:
 648         syms->getQuarters(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::WIDE);
 649         break;
 650
 651     case UDAT_STANDALONE_SHORT_QUARTERS:
 652         syms->getQuarters(count, DateFormatSymbols::STANDALONE, DateFormatSymbols::ABBREVIATED);
 653         break;
 654
 655     }
 656
 657     return count;
 658 }
 659
 660 U_NAMESPACE_BEGIN
 661
 662 /*
 663  * This DateFormatSymbolsSingleSetter class is a friend of DateFormatSymbols
 664  * solely for the purpose of avoiding to clone the array of strings
 665  * just to modify one of them and then setting all of them back.
 666  * For example, the old code looked like this:
 667  *  case UDAT_MONTHS:
 668  *    res = syms->getMonths(count);
 669  *    array = new UnicodeString[count];
 670  *    if(array == 0) {
 671  *      *status = U_MEMORY_ALLOCATION_ERROR;
 672  *      return;
 673  *    }
 674  *    uprv_arrayCopy(res, array, count);
 675  *    if(index < count)
 676  *      array[index] = val;
 677  *    syms->setMonths(array, count);
 678  *    break;
 679  *
 680  * Even worse, the old code actually cloned the entire DateFormatSymbols object,
 681  * cloned one value array, changed one value, and then made the SimpleDateFormat
 682  * replace its DateFormatSymbols object with the new one.
 683  *
 684  * markus 2002-oct-14
 685  */
 686 class DateFormatSymbolsSingleSetter /* not : public UObject because all methods are static */ {
 687 public:
 688     static void
 689         setSymbol(UnicodeString *array, int32_t count, int32_t index,
 690         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 691     {
 692         if(array!=NULL) {
 693             if(index>=count) {
 694                 errorCode=U_INDEX_OUTOFBOUNDS_ERROR;
 695             } else if(value==NULL) {
 696                 errorCode=U_ILLEGAL_ARGUMENT_ERROR;
 697             } else {
 698                 array[index].setTo(value, valueLength);
 699             }
 700         }
 701     }
 702
 703     static void
 704         setEra(DateFormatSymbols *syms, int32_t index,
 705         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 706     {
 707         setSymbol(syms->fEras, syms->fErasCount, index, value, valueLength, errorCode);
 708     }
 709
 710     static void
 711         setEraName(DateFormatSymbols *syms, int32_t index,
 712         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 713     {
 714         setSymbol(syms->fEraNames, syms->fEraNamesCount, index, value, valueLength, errorCode);
 715     }
 716
 717     static void
 718         setMonth(DateFormatSymbols *syms, int32_t index,
 719         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 720     {
 721         setSymbol(syms->fMonths, syms->fMonthsCount, index, value, valueLength, errorCode);
 722     }
 723
 724     static void
 725         setShortMonth(DateFormatSymbols *syms, int32_t index,
 726         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 727     {
 728         setSymbol(syms->fShortMonths, syms->fShortMonthsCount, index, value, valueLength, errorCode);
 729     }
 730
 731     static void
 732         setNarrowMonth(DateFormatSymbols *syms, int32_t index,
 733         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 734     {
 735         setSymbol(syms->fNarrowMonths, syms->fNarrowMonthsCount, index, value, valueLength, errorCode);
 736     }
 737
 738     static void
 739         setStandaloneMonth(DateFormatSymbols *syms, int32_t index,
 740         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 741     {
 742         setSymbol(syms->fStandaloneMonths, syms->fStandaloneMonthsCount, index, value, valueLength, errorCode);
 743     }
 744
 745     static void
 746         setStandaloneShortMonth(DateFormatSymbols *syms, int32_t index,
 747         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 748     {
 749         setSymbol(syms->fStandaloneShortMonths, syms->fStandaloneShortMonthsCount, index, value, valueLength, errorCode);
 750     }
 751
 752     static void
 753         setStandaloneNarrowMonth(DateFormatSymbols *syms, int32_t index,
 754         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 755     {
 756         setSymbol(syms->fStandaloneNarrowMonths, syms->fStandaloneNarrowMonthsCount, index, value, valueLength, errorCode);
 757     }
 758
 759     static void
 760         setWeekday(DateFormatSymbols *syms, int32_t index,
 761         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 762     {
 763         setSymbol(syms->fWeekdays, syms->fWeekdaysCount, index, value, valueLength, errorCode);
 764     }
 765
 766     static void
 767         setShortWeekday(DateFormatSymbols *syms, int32_t index,
 768         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 769     {
 770         setSymbol(syms->fShortWeekdays, syms->fShortWeekdaysCount, index, value, valueLength, errorCode);
 771     }
 772
 773     static void
 774         setShorterWeekday(DateFormatSymbols *syms, int32_t index,
 775         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 776     {
 777         setSymbol(syms->fShorterWeekdays, syms->fShorterWeekdaysCount, index, value, valueLength, errorCode);
 778     }
 779
 780     static void
 781         setNarrowWeekday(DateFormatSymbols *syms, int32_t index,
 782         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 783     {
 784         setSymbol(syms->fNarrowWeekdays, syms->fNarrowWeekdaysCount, index, value, valueLength, errorCode);
 785     }
 786
 787     static void
 788         setStandaloneWeekday(DateFormatSymbols *syms, int32_t index,
 789         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 790     {
 791         setSymbol(syms->fStandaloneWeekdays, syms->fStandaloneWeekdaysCount, index, value, valueLength, errorCode);
 792     }
 793
 794     static void
 795         setStandaloneShortWeekday(DateFormatSymbols *syms, int32_t index,
 796         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 797     {
 798         setSymbol(syms->fStandaloneShortWeekdays, syms->fStandaloneShortWeekdaysCount, index, value, valueLength, errorCode);
 799     }
 800
 801     static void
 802         setStandaloneShorterWeekday(DateFormatSymbols *syms, int32_t index,
 803         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 804     {
 805         setSymbol(syms->fStandaloneShorterWeekdays, syms->fStandaloneShorterWeekdaysCount, index, value, valueLength, errorCode);
 806     }
 807
 808     static void
 809         setStandaloneNarrowWeekday(DateFormatSymbols *syms, int32_t index,
 810         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 811     {
 812         setSymbol(syms->fStandaloneNarrowWeekdays, syms->fStandaloneNarrowWeekdaysCount, index, value, valueLength, errorCode);
 813     }
 814
 815     static void
 816         setQuarter(DateFormatSymbols *syms, int32_t index,
 817         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 818     {
 819         setSymbol(syms->fQuarters, syms->fQuartersCount, index, value, valueLength, errorCode);
 820     }
 821
 822     static void
 823         setShortQuarter(DateFormatSymbols *syms, int32_t index,
 824         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 825     {
 826         setSymbol(syms->fShortQuarters, syms->fShortQuartersCount, index, value, valueLength, errorCode);
 827     }
 828
 829     static void
 830         setStandaloneQuarter(DateFormatSymbols *syms, int32_t index,
 831         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 832     {
 833         setSymbol(syms->fStandaloneQuarters, syms->fStandaloneQuartersCount, index, value, valueLength, errorCode);
 834     }
 835
 836     static void
 837         setStandaloneShortQuarter(DateFormatSymbols *syms, int32_t index,
 838         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 839     {
 840         setSymbol(syms->fStandaloneShortQuarters, syms->fStandaloneShortQuartersCount, index, value, valueLength, errorCode);
 841     }
 842
 843     static void
 844         setAmPm(DateFormatSymbols *syms, int32_t index,
 845         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 846     {
 847         setSymbol(syms->fAmPms, syms->fAmPmsCount, index, value, valueLength, errorCode);
 848     }
 849
 850     static void
 851         setLocalPatternChars(DateFormatSymbols *syms,
 852         const UChar *value, int32_t valueLength, UErrorCode &errorCode)
 853     {
 854         setSymbol(&syms->fLocalPatternChars, 1, 0, value, valueLength, errorCode);
 855     }
 856 };
 857
 858 U_NAMESPACE_END
 859
 860 U_CAPI void U_EXPORT2
 861 udat_setSymbols(    UDateFormat             *format,
 862             UDateFormatSymbolType   type,
 863             int32_t                 index,
 864             UChar                   *value,
 865             int32_t                 valueLength,
 866             UErrorCode              *status)
 867 {
 868     verifyIsSimpleDateFormat(format, status);
 869     if(U_FAILURE(*status)) return;
 870
 871     DateFormatSymbols *syms = (DateFormatSymbols *)((SimpleDateFormat *)format)->getDateFormatSymbols();
 872
 873     switch(type) {
 874     case UDAT_ERAS:
 875         DateFormatSymbolsSingleSetter::setEra(syms, index, value, valueLength, *status);
 876         break;
 877
 878     case UDAT_ERA_NAMES:
 879         DateFormatSymbolsSingleSetter::setEraName(syms, index, value, valueLength, *status);
 880         break;
 881
 882     case UDAT_MONTHS:
 883         DateFormatSymbolsSingleSetter::setMonth(syms, index, value, valueLength, *status);
 884         break;
 885
 886     case UDAT_SHORT_MONTHS:
 887         DateFormatSymbolsSingleSetter::setShortMonth(syms, index, value, valueLength, *status);
 888         break;
 889
 890     case UDAT_NARROW_MONTHS:
 891         DateFormatSymbolsSingleSetter::setNarrowMonth(syms, index, value, valueLength, *status);
 892         break;
 893
 894     case UDAT_STANDALONE_MONTHS:
 895         DateFormatSymbolsSingleSetter::setStandaloneMonth(syms, index, value, valueLength, *status);
 896         break;
 897
 898     case UDAT_STANDALONE_SHORT_MONTHS:
 899         DateFormatSymbolsSingleSetter::setStandaloneShortMonth(syms, index, value, valueLength, *status);
 900         break;
 901
 902     case UDAT_STANDALONE_NARROW_MONTHS:
 903         DateFormatSymbolsSingleSetter::setStandaloneNarrowMonth(syms, index, value, valueLength, *status);
 904         break;
 905
 906     case UDAT_WEEKDAYS:
 907         DateFormatSymbolsSingleSetter::setWeekday(syms, index, value, valueLength, *status);
 908         break;
 909
 910     case UDAT_SHORT_WEEKDAYS:
 911         DateFormatSymbolsSingleSetter::setShortWeekday(syms, index, value, valueLength, *status);
 912         break;
 913
 914     case UDAT_SHORTER_WEEKDAYS:
 915         DateFormatSymbolsSingleSetter::setShorterWeekday(syms, index, value, valueLength, *status);
 916         break;
 917
 918     case UDAT_NARROW_WEEKDAYS:
 919         DateFormatSymbolsSingleSetter::setNarrowWeekday(syms, index, value, valueLength, *status);
 920         break;
 921
 922     case UDAT_STANDALONE_WEEKDAYS:
 923         DateFormatSymbolsSingleSetter::setStandaloneWeekday(syms, index, value, valueLength, *status);
 924         break;
 925
 926     case UDAT_STANDALONE_SHORT_WEEKDAYS:
 927         DateFormatSymbolsSingleSetter::setStandaloneShortWeekday(syms, index, value, valueLength, *status);
 928         break;
 929
 930     case UDAT_STANDALONE_SHORTER_WEEKDAYS:
 931         DateFormatSymbolsSingleSetter::setStandaloneShorterWeekday(syms, index, value, valueLength, *status);
 932         break;
 933
 934     case UDAT_STANDALONE_NARROW_WEEKDAYS:
 935         DateFormatSymbolsSingleSetter::setStandaloneNarrowWeekday(syms, index, value, valueLength, *status);
 936         break;
 937
 938     case UDAT_QUARTERS:
 939         DateFormatSymbolsSingleSetter::setQuarter(syms, index, value, valueLength, *status);
 940         break;
 941
 942     case UDAT_SHORT_QUARTERS:
 943         DateFormatSymbolsSingleSetter::setShortQuarter(syms, index, value, valueLength, *status);
 944         break;
 945
 946     case UDAT_STANDALONE_QUARTERS:
 947         DateFormatSymbolsSingleSetter::setStandaloneQuarter(syms, index, value, valueLength, *status);
 948         break;
 949
 950     case UDAT_STANDALONE_SHORT_QUARTERS:
 951         DateFormatSymbolsSingleSetter::setStandaloneShortQuarter(syms, index, value, valueLength, *status);
 952         break;
 953
 954     case UDAT_AM_PMS:
 955         DateFormatSymbolsSingleSetter::setAmPm(syms, index, value, valueLength, *status);
 956         break;
 957
 958     case UDAT_LOCALIZED_CHARS:
 959         DateFormatSymbolsSingleSetter::setLocalPatternChars(syms, value, valueLength, *status);
 960         break;
 961
 962     default:
 963         *status = U_UNSUPPORTED_ERROR;
 964         break;
 965
 966     }
 967 }
 968
 969 U_CAPI const char* U_EXPORT2
 970 udat_getLocaleByType(const UDateFormat *fmt,
 971                      ULocDataLocaleType type,
 972                      UErrorCode* status)
 973 {
 974     if (fmt == NULL) {
 975         if (U_SUCCESS(*status)) {
 976             *status = U_ILLEGAL_ARGUMENT_ERROR;
 977         }
 978         return NULL;
 979     }
 980     return ((Format*)fmt)->getLocaleID(type, *status);
 981 }
 982
 983
 984 U_CAPI void U_EXPORT2
 985 udat_setContext(UDateFormat* fmt, UDisplayContext value, UErrorCode* status)
 986 {
 987     verifyIsSimpleDateFormat(fmt, status);
 988     if (U_FAILURE(*status)) {
 989         return;
 990     }
 991     ((SimpleDateFormat*)fmt)->setContext(value, *status);
 992 }
 993
 994 U_CAPI UDisplayContext U_EXPORT2
 995 udat_getContext(UDateFormat* fmt, UDisplayContextType type, UErrorCode* status)
 996 {
 997     verifyIsSimpleDateFormat(fmt, status);
 998     if (U_FAILURE(*status)) {
 999         return (UDisplayContext)0;
1000     }
1001     return ((SimpleDateFormat*)fmt)->getContext(type, *status);
1002 }
1003
1004
1005 /**
1006  * Verify that fmt is a RelativeDateFormat. Invalid error if not.
1007  * @param fmt the UDateFormat, definitely a DateFormat, maybe something else
1008  * @param status error code, will be set to failure if there is a familure or the fmt is NULL.
1009  */
1010 static void verifyIsRelativeDateFormat(const UDateFormat* fmt, UErrorCode *status) {
1011    if(U_SUCCESS(*status) &&
1012        dynamic_cast<const RelativeDateFormat*>(reinterpret_cast<const DateFormat*>(fmt))==NULL) {
1013        *status = U_ILLEGAL_ARGUMENT_ERROR;
1014    }
1015 }
1016
1017
1018 U_CAPI int32_t U_EXPORT2
1019 udat_toPatternRelativeDate(const UDateFormat *fmt,
1020                            UChar             *result,
1021                            int32_t           resultLength,
1022                            UErrorCode        *status)
1023 {
1024     verifyIsRelativeDateFormat(fmt, status);
1025     if(U_FAILURE(*status)) return -1;
1026
1027     UnicodeString datePattern;
1028     if(!(result==NULL && resultLength==0)) {
1029         // NULL destination for pure preflighting: empty dummy string
1030         // otherwise, alias the destination buffer
1031         datePattern.setTo(result, 0, resultLength);
1032     }
1033     ((RelativeDateFormat*)fmt)->toPatternDate(datePattern, *status);
1034     return datePattern.extract(result, resultLength, *status);
1035 }
1036
1037 U_CAPI int32_t U_EXPORT2
1038 udat_toPatternRelativeTime(const UDateFormat *fmt,
1039                            UChar             *result,
1040                            int32_t           resultLength,
1041                            UErrorCode        *status)
1042 {
1043     verifyIsRelativeDateFormat(fmt, status);
1044     if(U_FAILURE(*status)) return -1;
1045
1046     UnicodeString timePattern;
1047     if(!(result==NULL && resultLength==0)) {
1048         // NULL destination for pure preflighting: empty dummy string
1049         // otherwise, alias the destination buffer
1050         timePattern.setTo(result, 0, resultLength);
1051     }
1052     ((RelativeDateFormat*)fmt)->toPatternTime(timePattern, *status);
1053     return timePattern.extract(result, resultLength, *status);
1054 }
1055
1056 U_CAPI void U_EXPORT2
1057 udat_applyPatternRelative(UDateFormat *format,
1058                           const UChar *datePattern,
1059                           int32_t     datePatternLength,
1060                           const UChar *timePattern,
1061                           int32_t     timePatternLength,
1062                           UErrorCode  *status)
1063 {
1064     verifyIsRelativeDateFormat(format, status);
1065     if(U_FAILURE(*status)) return;
1066     const UnicodeString datePat((UBool)(datePatternLength == -1), datePattern, datePatternLength);
1067     const UnicodeString timePat((UBool)(timePatternLength == -1), timePattern, timePatternLength);
1068     ((RelativeDateFormat*)format)->applyPatterns(datePat, timePat, *status);
1069 }
1070
1071 #endif /* #if !UCONFIG_NO_FORMATTING */