source/i18n/reldtfmt.cpp

   1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 * Copyright (C) 2007-2016, International Business Machines Corporation and
   6 * others. All Rights Reserved.
   7 *******************************************************************************
   8 */
   9
  10 #include "unicode/utypes.h"
  11
  12 #if !UCONFIG_NO_FORMATTING
  13
  14 #include <stdlib.h>
  15
  16 #include "unicode/datefmt.h"
  17 #include "unicode/reldatefmt.h"
  18 #include "unicode/simpleformatter.h"
  19 #include "unicode/smpdtfmt.h"
  20 #include "unicode/udisplaycontext.h"
  21 #include "unicode/uchar.h"
  22 #include "unicode/brkiter.h"
  23
  24 #include "reldtfmt.h"
  25 #include "cmemory.h"
  26 #include "uresimp.h"
  27
  28 U_NAMESPACE_BEGIN
  29
  30
  31 /**
  32  * An array of URelativeString structs is used to store the resource data loaded out of the bundle.
  33  */
  34 struct URelativeString {
  35     int32_t offset;         /** offset of this item, such as, the relative date **/
  36     int32_t len;            /** length of the string **/
  37     const UChar* string;    /** string, or NULL if not set **/
  38 };
  39
  40 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RelativeDateFormat)
  41
  42 RelativeDateFormat::RelativeDateFormat(const RelativeDateFormat& other) :
  43  DateFormat(other), fDateTimeFormatter(NULL), fDatePattern(other.fDatePattern),
  44  fTimePattern(other.fTimePattern), fCombinedFormat(NULL),
  45  fDateStyle(other.fDateStyle), fLocale(other.fLocale),
  46  fDatesLen(other.fDatesLen), fDates(NULL),
  47  fCombinedHasDateAtStart(other.fCombinedHasDateAtStart),
  48  fCapitalizationInfoSet(other.fCapitalizationInfoSet),
  49  fCapitalizationOfRelativeUnitsForUIListMenu(other.fCapitalizationOfRelativeUnitsForUIListMenu),
  50  fCapitalizationOfRelativeUnitsForStandAlone(other.fCapitalizationOfRelativeUnitsForStandAlone),
  51  fCapitalizationBrkIter(NULL)
  52 {
  53     if(other.fDateTimeFormatter != NULL) {
  54         fDateTimeFormatter = (SimpleDateFormat*)other.fDateTimeFormatter->clone();
  55     }
  56     if(other.fCombinedFormat != NULL) {
  57         fCombinedFormat = new SimpleFormatter(*other.fCombinedFormat);
  58     }
  59     if (fDatesLen > 0) {
  60         fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*(size_t)fDatesLen);
  61         uprv_memcpy(fDates, other.fDates, sizeof(fDates[0])*(size_t)fDatesLen);
  62     }
  63 #if !UCONFIG_NO_BREAK_ITERATION
  64     if (other.fCapitalizationBrkIter != NULL) {
  65         fCapitalizationBrkIter = (other.fCapitalizationBrkIter)->clone();
  66     }
  67 #endif
  68 }
  69
  70 RelativeDateFormat::RelativeDateFormat( UDateFormatStyle timeStyle, UDateFormatStyle dateStyle,
  71                                         const Locale& locale, UErrorCode& status) :
  72  DateFormat(), fDateTimeFormatter(NULL), fDatePattern(), fTimePattern(), fCombinedFormat(NULL),
  73  fDateStyle(dateStyle), fLocale(locale), fDatesLen(0), fDates(NULL),
  74  fCombinedHasDateAtStart(FALSE), fCapitalizationInfoSet(FALSE),
  75  fCapitalizationOfRelativeUnitsForUIListMenu(FALSE), fCapitalizationOfRelativeUnitsForStandAlone(FALSE),
  76  fCapitalizationBrkIter(NULL)
  77 {
  78     if(U_FAILURE(status) ) {
  79         return;
  80     }
  81
  82     if (timeStyle < UDAT_NONE || timeStyle > UDAT_SHORT) {
  83         // don't support other time styles (e.g. relative styles), for now
  84         status = U_ILLEGAL_ARGUMENT_ERROR;
  85         return;
  86     }
  87     UDateFormatStyle baseDateStyle = (dateStyle > UDAT_SHORT)? (UDateFormatStyle)(dateStyle & ~UDAT_RELATIVE): dateStyle;
  88     DateFormat * df;
  89     // Get fDateTimeFormatter from either date or time style (does not matter, we will override the pattern).
  90     // We do need to get separate patterns for the date & time styles.
  91     if (baseDateStyle != UDAT_NONE) {
  92         df = createDateInstance((EStyle)baseDateStyle, locale);
  93         fDateTimeFormatter=dynamic_cast<SimpleDateFormat *>(df);
  94         if (fDateTimeFormatter == NULL) {
  95             status = U_UNSUPPORTED_ERROR;
  96              return;
  97         }
  98         fDateTimeFormatter->toPattern(fDatePattern);
  99         if (timeStyle != UDAT_NONE) {
 100             df = createTimeInstance((EStyle)timeStyle, locale);
 101             SimpleDateFormat *sdf = dynamic_cast<SimpleDateFormat *>(df);
 102             if (sdf != NULL) {
 103                 sdf->toPattern(fTimePattern);
 104                 delete sdf;
 105             }
 106         }
 107     } else {
 108         // does not matter whether timeStyle is UDAT_NONE, we need something for fDateTimeFormatter
 109         df = createTimeInstance((EStyle)timeStyle, locale);
 110         fDateTimeFormatter=dynamic_cast<SimpleDateFormat *>(df);
 111         if (fDateTimeFormatter == NULL) {
 112             status = U_UNSUPPORTED_ERROR;
 113             delete df;
 114             return;
 115         }
 116         fDateTimeFormatter->toPattern(fTimePattern);
 117     }
 118
 119     // Initialize the parent fCalendar, so that parse() works correctly.
 120     initializeCalendar(NULL, locale, status);
 121     loadDates(status);
 122 }
 123
 124 RelativeDateFormat::~RelativeDateFormat() {
 125     delete fDateTimeFormatter;
 126     delete fCombinedFormat;
 127     uprv_free(fDates);
 128 #if !UCONFIG_NO_BREAK_ITERATION
 129     delete fCapitalizationBrkIter;
 130 #endif
 131 }
 132
 133
 134 Format* RelativeDateFormat::clone(void) const {
 135     return new RelativeDateFormat(*this);
 136 }
 137
 138 UBool RelativeDateFormat::operator==(const Format& other) const {
 139     if(DateFormat::operator==(other)) {
 140         // The DateFormat::operator== check for fCapitalizationContext equality above
 141         //   is sufficient to check equality of all derived context-related data.
 142         // DateFormat::operator== guarantees following cast is safe
 143         RelativeDateFormat* that = (RelativeDateFormat*)&other;
 144         return (fDateStyle==that->fDateStyle   &&
 145                 fDatePattern==that->fDatePattern   &&
 146                 fTimePattern==that->fTimePattern   &&
 147                 fLocale==that->fLocale );
 148     }
 149     return FALSE;
 150 }
 151
 152 static const UChar APOSTROPHE = (UChar)0x0027;
 153
 154 UnicodeString& RelativeDateFormat::format(  Calendar& cal,
 155                                 UnicodeString& appendTo,
 156                                 FieldPosition& pos) const {
 157
 158     UErrorCode status = U_ZERO_ERROR;
 159     UnicodeString relativeDayString;
 160     UDisplayContext capitalizationContext = getContext(UDISPCTX_TYPE_CAPITALIZATION, status);
 161
 162     // calculate the difference, in days, between 'cal' and now.
 163     int dayDiff = dayDifference(cal, status);
 164
 165     // look up string
 166     int32_t len = 0;
 167     const UChar *theString = getStringForDay(dayDiff, len, status);
 168     if(U_SUCCESS(status) && (theString!=NULL)) {
 169         // found a relative string
 170         relativeDayString.setTo(theString, len);
 171     }
 172
 173     if ( relativeDayString.length() > 0 && !fDatePattern.isEmpty() &&
 174          (fTimePattern.isEmpty() || fCombinedFormat == NULL || fCombinedHasDateAtStart)) {
 175 #if !UCONFIG_NO_BREAK_ITERATION
 176         // capitalize relativeDayString according to context for relative, set formatter no context
 177         if ( u_islower(relativeDayString.char32At(0)) && fCapitalizationBrkIter!= NULL &&
 178              ( capitalizationContext==UDISPCTX_CAPITALIZATION_FOR_BEGINNING_OF_SENTENCE ||
 179                (capitalizationContext==UDISPCTX_CAPITALIZATION_FOR_UI_LIST_OR_MENU && fCapitalizationOfRelativeUnitsForUIListMenu) ||
 180                (capitalizationContext==UDISPCTX_CAPITALIZATION_FOR_STANDALONE && fCapitalizationOfRelativeUnitsForStandAlone) ) ) {
 181             // titlecase first word of relativeDayString
 182             relativeDayString.toTitle(fCapitalizationBrkIter, fLocale, U_TITLECASE_NO_LOWERCASE | U_TITLECASE_NO_BREAK_ADJUSTMENT);
 183         }
 184 #endif
 185         fDateTimeFormatter->setContext(UDISPCTX_CAPITALIZATION_NONE, status);
 186     } else {
 187         // set our context for the formatter
 188         fDateTimeFormatter->setContext(capitalizationContext, status);
 189     }
 190
 191     if (fDatePattern.isEmpty()) {
 192         fDateTimeFormatter->applyPattern(fTimePattern);
 193         fDateTimeFormatter->format(cal,appendTo,pos);
 194     } else if (fTimePattern.isEmpty() || fCombinedFormat == NULL) {
 195         if (relativeDayString.length() > 0) {
 196             appendTo.append(relativeDayString);
 197         } else {
 198             fDateTimeFormatter->applyPattern(fDatePattern);
 199             fDateTimeFormatter->format(cal,appendTo,pos);
 200         }
 201     } else {
 202         UnicodeString datePattern;
 203         if (relativeDayString.length() > 0) {
 204             // Need to quote the relativeDayString to make it a legal date pattern
 205             relativeDayString.findAndReplace(UNICODE_STRING("'", 1), UNICODE_STRING("''", 2)); // double any existing APOSTROPHE
 206             relativeDayString.insert(0, APOSTROPHE); // add APOSTROPHE at beginning...
 207             relativeDayString.append(APOSTROPHE); // and at end
 208             datePattern.setTo(relativeDayString);
 209         } else {
 210             datePattern.setTo(fDatePattern);
 211         }
 212         UnicodeString combinedPattern;
 213         fCombinedFormat->format(fTimePattern, datePattern, combinedPattern, status);
 214         fDateTimeFormatter->applyPattern(combinedPattern);
 215         fDateTimeFormatter->format(cal,appendTo,pos);
 216     }
 217
 218     return appendTo;
 219 }
 220
 221
 222
 223 UnicodeString&
 224 RelativeDateFormat::format(const Formattable& obj,
 225                          UnicodeString& appendTo,
 226                          FieldPosition& pos,
 227                          UErrorCode& status) const
 228 {
 229     // this is just here to get around the hiding problem
 230     // (the previous format() override would hide the version of
 231     // format() on DateFormat that this function correspond to, so we
 232     // have to redefine it here)
 233     return DateFormat::format(obj, appendTo, pos, status);
 234 }
 235
 236
 237 void RelativeDateFormat::parse( const UnicodeString& text,
 238                     Calendar& cal,
 239                     ParsePosition& pos) const {
 240
 241     int32_t startIndex = pos.getIndex();
 242     if (fDatePattern.isEmpty()) {
 243         // no date pattern, try parsing as time
 244         fDateTimeFormatter->applyPattern(fTimePattern);
 245         fDateTimeFormatter->parse(text,cal,pos);
 246     } else if (fTimePattern.isEmpty() || fCombinedFormat == NULL) {
 247         // no time pattern or way to combine, try parsing as date
 248         // first check whether text matches a relativeDayString
 249         UBool matchedRelative = FALSE;
 250         for (int n=0; n < fDatesLen && !matchedRelative; n++) {
 251             if (fDates[n].string != NULL &&
 252                     text.compare(startIndex, fDates[n].len, fDates[n].string) == 0) {
 253                 // it matched, handle the relative day string
 254                 UErrorCode status = U_ZERO_ERROR;
 255                 matchedRelative = TRUE;
 256
 257                 // Set the calendar to now+offset
 258                 cal.setTime(Calendar::getNow(),status);
 259                 cal.add(UCAL_DATE,fDates[n].offset, status);
 260
 261                 if(U_FAILURE(status)) {
 262                     // failure in setting calendar field, set offset to beginning of rel day string
 263                     pos.setErrorIndex(startIndex);
 264                 } else {
 265                     pos.setIndex(startIndex + fDates[n].len);
 266                 }
 267             }
 268         }
 269         if (!matchedRelative) {
 270             // just parse as normal date
 271             fDateTimeFormatter->applyPattern(fDatePattern);
 272             fDateTimeFormatter->parse(text,cal,pos);
 273         }
 274     } else {
 275         // Here we replace any relativeDayString in text with the equivalent date
 276         // formatted per fDatePattern, then parse text normally using the combined pattern.
 277         UnicodeString modifiedText(text);
 278         FieldPosition fPos;
 279         int32_t dateStart = 0, origDateLen = 0, modDateLen = 0;
 280         UErrorCode status = U_ZERO_ERROR;
 281         for (int n=0; n < fDatesLen; n++) {
 282             int32_t relativeStringOffset;
 283             if (fDates[n].string != NULL &&
 284                     (relativeStringOffset = modifiedText.indexOf(fDates[n].string, fDates[n].len, startIndex)) >= startIndex) {
 285                 // it matched, replace the relative date with a real one for parsing
 286                 UnicodeString dateString;
 287                 Calendar * tempCal = cal.clone();
 288
 289                 // Set the calendar to now+offset
 290                 tempCal->setTime(Calendar::getNow(),status);
 291                 tempCal->add(UCAL_DATE,fDates[n].offset, status);
 292                 if(U_FAILURE(status)) {
 293                     pos.setErrorIndex(startIndex);
 294                     delete tempCal;
 295                     return;
 296                 }
 297
 298                 fDateTimeFormatter->applyPattern(fDatePattern);
 299                 fDateTimeFormatter->format(*tempCal, dateString, fPos);
 300                 dateStart = relativeStringOffset;
 301                 origDateLen = fDates[n].len;
 302                 modDateLen = dateString.length();
 303                 modifiedText.replace(dateStart, origDateLen, dateString);
 304                 delete tempCal;
 305                 break;
 306             }
 307         }
 308         UnicodeString combinedPattern;
 309         fCombinedFormat->format(fTimePattern, fDatePattern, combinedPattern, status);
 310         fDateTimeFormatter->applyPattern(combinedPattern);
 311         fDateTimeFormatter->parse(modifiedText,cal,pos);
 312
 313         // Adjust offsets
 314         UBool noError = (pos.getErrorIndex() < 0);
 315         int32_t offset = (noError)? pos.getIndex(): pos.getErrorIndex();
 316         if (offset >= dateStart + modDateLen) {
 317             // offset at or after the end of the replaced text,
 318             // correct by the difference between original and replacement
 319             offset -= (modDateLen - origDateLen);
 320         } else if (offset >= dateStart) {
 321             // offset in the replaced text, set it to the beginning of that text
 322             // (i.e. the beginning of the relative day string)
 323             offset = dateStart;
 324         }
 325         if (noError) {
 326             pos.setIndex(offset);
 327         } else {
 328             pos.setErrorIndex(offset);
 329         }
 330     }
 331 }
 332
 333 UDate
 334 RelativeDateFormat::parse( const UnicodeString& text,
 335                          ParsePosition& pos) const {
 336     // redefined here because the other parse() function hides this function's
 337     // cunterpart on DateFormat
 338     return DateFormat::parse(text, pos);
 339 }
 340
 341 UDate
 342 RelativeDateFormat::parse(const UnicodeString& text, UErrorCode& status) const
 343 {
 344     // redefined here because the other parse() function hides this function's
 345     // counterpart on DateFormat
 346     return DateFormat::parse(text, status);
 347 }
 348
 349
 350 const UChar *RelativeDateFormat::getStringForDay(int32_t day, int32_t &len, UErrorCode &status) const {
 351     if(U_FAILURE(status)) {
 352         return NULL;
 353     }
 354
 355     // Is it inside the resource bundle's range?
 356     int n = day + UDAT_DIRECTION_THIS;
 357     if (n >= 0 && n < fDatesLen) {
 358         if (fDates[n].offset == day && fDates[n].string != NULL) {
 359             len = fDates[n].len;
 360             return fDates[n].string;
 361         }
 362     }
 363     return NULL;  // not found.
 364 }
 365
 366 UnicodeString&
 367 RelativeDateFormat::toPattern(UnicodeString& result, UErrorCode& status) const
 368 {
 369     if (!U_FAILURE(status)) {
 370         result.remove();
 371         if (fDatePattern.isEmpty()) {
 372             result.setTo(fTimePattern);
 373         } else if (fTimePattern.isEmpty() || fCombinedFormat == NULL) {
 374             result.setTo(fDatePattern);
 375         } else {
 376             fCombinedFormat->format(fTimePattern, fDatePattern, result, status);
 377         }
 378     }
 379     return result;
 380 }
 381
 382 UnicodeString&
 383 RelativeDateFormat::toPatternDate(UnicodeString& result, UErrorCode& status) const
 384 {
 385     if (!U_FAILURE(status)) {
 386         result.remove();
 387         result.setTo(fDatePattern);
 388     }
 389     return result;
 390 }
 391
 392 UnicodeString&
 393 RelativeDateFormat::toPatternTime(UnicodeString& result, UErrorCode& status) const
 394 {
 395     if (!U_FAILURE(status)) {
 396         result.remove();
 397         result.setTo(fTimePattern);
 398     }
 399     return result;
 400 }
 401
 402 void
 403 RelativeDateFormat::applyPatterns(const UnicodeString& datePattern, const UnicodeString& timePattern, UErrorCode &status)
 404 {
 405     if (!U_FAILURE(status)) {
 406         fDatePattern.setTo(datePattern);
 407         fTimePattern.setTo(timePattern);
 408     }
 409 }
 410
 411 const DateFormatSymbols*
 412 RelativeDateFormat::getDateFormatSymbols() const
 413 {
 414     return fDateTimeFormatter->getDateFormatSymbols();
 415 }
 416
 417 // override the DateFormat implementation in order to
 418 // lazily initialize relevant items
 419 void
 420 RelativeDateFormat::setContext(UDisplayContext value, UErrorCode& status)
 421 {
 422     DateFormat::setContext(value, status);
 423     if (U_SUCCESS(status)) {
 424         if (!fCapitalizationInfoSet &&
 425                 (value==UDISPCTX_CAPITALIZATION_FOR_UI_LIST_OR_MENU || value==UDISPCTX_CAPITALIZATION_FOR_STANDALONE)) {
 426             initCapitalizationContextInfo(fLocale);
 427             fCapitalizationInfoSet = TRUE;
 428         }
 429 #if !UCONFIG_NO_BREAK_ITERATION
 430         if ( fCapitalizationBrkIter == NULL && (value==UDISPCTX_CAPITALIZATION_FOR_BEGINNING_OF_SENTENCE ||
 431                 (value==UDISPCTX_CAPITALIZATION_FOR_UI_LIST_OR_MENU && fCapitalizationOfRelativeUnitsForUIListMenu) ||
 432                 (value==UDISPCTX_CAPITALIZATION_FOR_STANDALONE && fCapitalizationOfRelativeUnitsForStandAlone)) ) {
 433             UErrorCode status = U_ZERO_ERROR;
 434             fCapitalizationBrkIter = BreakIterator::createSentenceInstance(fLocale, status);
 435             if (U_FAILURE(status)) {
 436                 delete fCapitalizationBrkIter;
 437                 fCapitalizationBrkIter = NULL;
 438             }
 439         }
 440 #endif
 441     }
 442 }
 443
 444 void
 445 RelativeDateFormat::initCapitalizationContextInfo(const Locale& thelocale)
 446 {
 447 #if !UCONFIG_NO_BREAK_ITERATION
 448     const char * localeID = (thelocale != NULL)? thelocale.getBaseName(): NULL;
 449     UErrorCode status = U_ZERO_ERROR;
 450     LocalUResourceBundlePointer rb(ures_open(NULL, localeID, &status));
 451     ures_getByKeyWithFallback(rb.getAlias(),
 452                               "contextTransforms/relative",
 453                                rb.getAlias(), &status);
 454     if (U_SUCCESS(status) && rb != NULL) {
 455         int32_t len = 0;
 456         const int32_t * intVector = ures_getIntVector(rb.getAlias(),
 457                                                       &len, &status);
 458         if (U_SUCCESS(status) && intVector != NULL && len >= 2) {
 459             fCapitalizationOfRelativeUnitsForUIListMenu = intVector[0];
 460             fCapitalizationOfRelativeUnitsForStandAlone = intVector[1];
 461         }
 462     }
 463 #endif
 464 }
 465
 466 namespace {
 467
 468 /**
 469  * Sink for getting data from fields/day/relative data.
 470  * For loading relative day names, e.g., "yesterday", "today".
 471  */
 472
 473 struct RelDateFmtDataSink : public ResourceSink {
 474   URelativeString *fDatesPtr;
 475   int32_t fDatesLen;
 476
 477   RelDateFmtDataSink(URelativeString* fDates, int32_t len) : fDatesPtr(fDates), fDatesLen(len) {
 478     for (int32_t i = 0; i < fDatesLen; ++i) {
 479       fDatesPtr[i].offset = 0;
 480       fDatesPtr[i].string = NULL;
 481       fDatesPtr[i].len = -1;
 482     }
 483   }
 484
 485   virtual ~RelDateFmtDataSink();
 486
 487   virtual void put(const char *key, ResourceValue &value,
 488                    UBool /*noFallback*/, UErrorCode &errorCode) {
 489       ResourceTable relDayTable = value.getTable(errorCode);
 490       int32_t n = 0;
 491       int32_t len = 0;
 492       for (int32_t i = 0; relDayTable.getKeyAndValue(i, key, value); ++i) {
 493         // Find the relative offset.
 494         int32_t offset = atoi(key);
 495
 496         // Put in the proper spot, but don't override existing data.
 497         n = offset + UDAT_DIRECTION_THIS; // Converts to index in UDAT_R
 498         if (n < fDatesLen && fDatesPtr[n].string == NULL) {
 499           // Not found and n is an empty slot.
 500           fDatesPtr[n].offset = offset;
 501           fDatesPtr[n].string = value.getString(len, errorCode);
 502           fDatesPtr[n].len = len;
 503         }
 504       }
 505   }
 506 };
 507
 508
 509 // Virtual destructors must be defined out of line.
 510 RelDateFmtDataSink::~RelDateFmtDataSink() {}
 511
 512 }  // Namespace
 513
 514
 515 static const UChar patItem1[] = {0x7B,0x31,0x7D}; // "{1}"
 516 static const int32_t patItem1Len = 3;
 517
 518 void RelativeDateFormat::loadDates(UErrorCode &status) {
 519     UResourceBundle *rb = ures_open(NULL, fLocale.getBaseName(), &status);
 520     LocalUResourceBundlePointer dateTimePatterns(
 521         ures_getByKeyWithFallback(rb,
 522                                   "calendar/gregorian/DateTimePatterns",
 523                                   (UResourceBundle*)NULL, &status));
 524     if(U_SUCCESS(status)) {
 525         int32_t patternsSize = ures_getSize(dateTimePatterns.getAlias());
 526         if (patternsSize > kDateTime) {
 527             int32_t resStrLen = 0;
 528             int32_t glueIndex = kDateTime;
 529             if (patternsSize >= (kDateTimeOffset + kShort + 1)) {
 530                 int32_t offsetIncrement = (fDateStyle & ~kRelative); // Remove relative bit.
 531                 if (offsetIncrement >= (int32_t)kFull &&
 532                     offsetIncrement <= (int32_t)kShortRelative) {
 533                     glueIndex = kDateTimeOffset + offsetIncrement;
 534                 }
 535             }
 536
 537             const UChar *resStr = ures_getStringByIndex(dateTimePatterns.getAlias(), glueIndex, &resStrLen, &status);
 538             if (U_SUCCESS(status) && resStrLen >= patItem1Len && u_strncmp(resStr,patItem1,patItem1Len)==0) {
 539                 fCombinedHasDateAtStart = TRUE;
 540             }
 541             fCombinedFormat = new SimpleFormatter(UnicodeString(TRUE, resStr, resStrLen), 2, 2, status);
 542         }
 543     }
 544
 545     // Data loading for relative names, e.g., "yesterday", "today", "tomorrow".
 546     fDatesLen = UDAT_DIRECTION_COUNT; // Maximum defined by data.
 547     fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);
 548
 549     RelDateFmtDataSink sink(fDates, fDatesLen);
 550     ures_getAllItemsWithFallback(rb, "fields/day/relative", sink, status);
 551
 552     ures_close(rb);
 553
 554     if(U_FAILURE(status)) {
 555         fDatesLen=0;
 556         return;
 557     }
 558 }
 559
 560 //----------------------------------------------------------------------
 561
 562 // this should to be in DateFormat, instead it was copied from SimpleDateFormat.
 563
 564 Calendar*
 565 RelativeDateFormat::initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status)
 566 {
 567     if(!U_FAILURE(status)) {
 568         fCalendar = Calendar::createInstance(adoptZone?adoptZone:TimeZone::createDefault(), locale, status);
 569     }
 570     if (U_SUCCESS(status) && fCalendar == NULL) {
 571         status = U_MEMORY_ALLOCATION_ERROR;
 572     }
 573     return fCalendar;
 574 }
 575
 576 int32_t RelativeDateFormat::dayDifference(Calendar &cal, UErrorCode &status) {
 577     if(U_FAILURE(status)) {
 578         return 0;
 579     }
 580     // TODO: Cache the nowCal to avoid heap allocs? Would be difficult, don't know the calendar type
 581     Calendar *nowCal = cal.clone();
 582     nowCal->setTime(Calendar::getNow(), status);
 583
 584     // For the day difference, we are interested in the difference in the (modified) julian day number
 585     // which is midnight to midnight.  Using fieldDifference() is NOT correct here, because
 586     // 6pm Jan 4th  to 10am Jan 5th should be considered "tomorrow".
 587     int32_t dayDiff = cal.get(UCAL_JULIAN_DAY, status) - nowCal->get(UCAL_JULIAN_DAY, status);
 588
 589     delete nowCal;
 590     return dayDiff;
 591 }
 592
 593 U_NAMESPACE_END
 594
 595 #endif  /* !UCONFIG_NO_FORMATTING */