1/*******************************************************************************
2* Copyright (C) 2008-2012, International Business Machines Corporation and
3* others. All Rights Reserved.
4*******************************************************************************
5*
6* File DTITVFMT.CPP
7*
8*******************************************************************************
9*/
10
11#include "utypeinfo.h"  // for 'typeid' to work
12
13#include "unicode/dtitvfmt.h"
14
15#if !UCONFIG_NO_FORMATTING
16
17//TODO: put in compilation
18//#define DTITVFMT_DEBUG 1
19
20#include "cstring.h"
21#include "unicode/msgfmt.h"
22#include "unicode/dtptngen.h"
23#include "unicode/dtitvinf.h"
24#include "unicode/calendar.h"
25#include "dtitv_impl.h"
26
27#ifdef DTITVFMT_DEBUG
28#include <iostream>
29#include "cstring.h"
30#endif
31
32#include "gregoimp.h"
33
34U_NAMESPACE_BEGIN
35
36
37
38#ifdef DTITVFMT_DEBUG
39#define PRINTMESG(msg) { std::cout << "(" << __FILE__ << ":" << __LINE__ << ") " << msg << "\n"; }
40#endif
41
42
43static const UChar gDateFormatSkeleton[][11] = {
44//yMMMMEEEEd
45{LOW_Y, CAP_M, CAP_M, CAP_M, CAP_M, CAP_E, CAP_E, CAP_E, CAP_E, LOW_D, 0},
46//yMMMMd
47{LOW_Y, CAP_M, CAP_M, CAP_M, CAP_M, LOW_D, 0},
48//yMMMd
49{LOW_Y, CAP_M, CAP_M, CAP_M, LOW_D, 0},
50//yMd
51{LOW_Y, CAP_M, LOW_D, 0} };
52
53
54static const char gDateTimePatternsTag[]="DateTimePatterns";
55
56
57// latestFirst:
58static const UChar gLaterFirstPrefix[] = {LOW_L, LOW_A, LOW_T, LOW_E, LOW_S,LOW_T, CAP_F, LOW_I, LOW_R, LOW_S, LOW_T, COLON};
59
60// earliestFirst:
61static const UChar gEarlierFirstPrefix[] = {LOW_E, LOW_A, LOW_R, LOW_L, LOW_I, LOW_E, LOW_S, LOW_T, CAP_F, LOW_I, LOW_R, LOW_S, LOW_T, COLON};
62
63
64UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DateIntervalFormat)
65
66
67
68DateIntervalFormat* U_EXPORT2
69DateIntervalFormat::createInstance(const UnicodeString& skeleton,
70                                   UErrorCode& status) {
71    return createInstance(skeleton, Locale::getDefault(), status);
72}
73
74
75DateIntervalFormat* U_EXPORT2
76DateIntervalFormat::createInstance(const UnicodeString& skeleton,
77                                   const Locale& locale,
78                                   UErrorCode& status) {
79#ifdef DTITVFMT_DEBUG
80    char result[1000];
81    char result_1[1000];
82    char mesg[2000];
83    skeleton.extract(0,  skeleton.length(), result, "UTF-8");
84    UnicodeString pat;
85    ((SimpleDateFormat*)dtfmt)->toPattern(pat);
86    pat.extract(0,  pat.length(), result_1, "UTF-8");
87    sprintf(mesg, "skeleton: %s; pattern: %s\n", result, result_1);
88    PRINTMESG(mesg)
89#endif
90
91    DateIntervalInfo* dtitvinf = new DateIntervalInfo(locale, status);
92    return create(locale, dtitvinf, &skeleton, status);
93}
94
95
96
97DateIntervalFormat* U_EXPORT2
98DateIntervalFormat::createInstance(const UnicodeString& skeleton,
99                                   const DateIntervalInfo& dtitvinf,
100                                   UErrorCode& status) {
101    return createInstance(skeleton, Locale::getDefault(), dtitvinf, status);
102}
103
104
105DateIntervalFormat* U_EXPORT2
106DateIntervalFormat::createInstance(const UnicodeString& skeleton,
107                                   const Locale& locale,
108                                   const DateIntervalInfo& dtitvinf,
109                                   UErrorCode& status) {
110    DateIntervalInfo* ptn = dtitvinf.clone();
111    return create(locale, ptn, &skeleton, status);
112}
113
114
115DateIntervalFormat::DateIntervalFormat()
116:   fInfo(NULL),
117    fDateFormat(NULL),
118    fFromCalendar(NULL),
119    fToCalendar(NULL),
120    fDtpng(NULL)
121{}
122
123
124DateIntervalFormat::DateIntervalFormat(const DateIntervalFormat& itvfmt)
125:   Format(itvfmt),
126    fInfo(NULL),
127    fDateFormat(NULL),
128    fFromCalendar(NULL),
129    fToCalendar(NULL),
130    fDtpng(NULL) {
131    *this = itvfmt;
132}
133
134
135DateIntervalFormat&
136DateIntervalFormat::operator=(const DateIntervalFormat& itvfmt) {
137    if ( this != &itvfmt ) {
138        delete fDateFormat;
139        delete fInfo;
140        delete fFromCalendar;
141        delete fToCalendar;
142        delete fDtpng;
143        if ( itvfmt.fDateFormat ) {
144            fDateFormat = (SimpleDateFormat*)itvfmt.fDateFormat->clone();
145        } else {
146            fDateFormat = NULL;
147        }
148        if ( itvfmt.fInfo ) {
149            fInfo = itvfmt.fInfo->clone();
150        } else {
151            fInfo = NULL;
152        }
153        if ( itvfmt.fFromCalendar ) {
154            fFromCalendar = itvfmt.fFromCalendar->clone();
155        } else {
156            fFromCalendar = NULL;
157        }
158        if ( itvfmt.fToCalendar ) {
159            fToCalendar = itvfmt.fToCalendar->clone();
160        } else {
161            fToCalendar = NULL;
162        }
163        fSkeleton = itvfmt.fSkeleton;
164        int8_t i;
165        for ( i = 0; i< DateIntervalInfo::kIPI_MAX_INDEX; ++i ) {
166            fIntervalPatterns[i] = itvfmt.fIntervalPatterns[i];
167        }
168        if (itvfmt.fDtpng) {
169            fDtpng = itvfmt.fDtpng->clone();
170        }
171    }
172    return *this;
173}
174
175
176DateIntervalFormat::~DateIntervalFormat() {
177    delete fInfo;
178    delete fDateFormat;
179    delete fFromCalendar;
180    delete fToCalendar;
181    delete fDtpng;
182}
183
184
185Format*
186DateIntervalFormat::clone(void) const {
187    return new DateIntervalFormat(*this);
188}
189
190
191UBool
192DateIntervalFormat::operator==(const Format& other) const {
193    if (typeid(*this) == typeid(other)) {
194        const DateIntervalFormat* fmt = (DateIntervalFormat*)&other;
195#ifdef DTITVFMT_DEBUG
196    UBool equal;
197    equal = (this == fmt);
198
199    equal = (*fInfo == *fmt->fInfo);
200    equal = (*fDateFormat == *fmt->fDateFormat);
201    equal = fFromCalendar->isEquivalentTo(*fmt->fFromCalendar) ;
202    equal = fToCalendar->isEquivalentTo(*fmt->fToCalendar) ;
203    equal = (fSkeleton == fmt->fSkeleton);
204#endif
205        UBool res;
206        res =  ( this == fmt ) ||
207               ( Format::operator==(other) &&
208                 fInfo &&
209                 ( *fInfo == *fmt->fInfo ) &&
210                 fDateFormat &&
211                 ( *fDateFormat == *fmt->fDateFormat ) &&
212                 fFromCalendar &&
213                 fFromCalendar->isEquivalentTo(*fmt->fFromCalendar) &&
214                 fToCalendar &&
215                 fToCalendar->isEquivalentTo(*fmt->fToCalendar) &&
216                 fSkeleton == fmt->fSkeleton &&
217                 fDtpng &&
218                 (*fDtpng == *fmt->fDtpng) );
219        int8_t i;
220        for (i = 0; i< DateIntervalInfo::kIPI_MAX_INDEX && res == TRUE; ++i ) {
221            res =   ( fIntervalPatterns[i].firstPart ==
222                      fmt->fIntervalPatterns[i].firstPart) &&
223                    ( fIntervalPatterns[i].secondPart ==
224                      fmt->fIntervalPatterns[i].secondPart ) &&
225                    ( fIntervalPatterns[i].laterDateFirst ==
226                      fmt->fIntervalPatterns[i].laterDateFirst) ;
227        }
228        return res;
229    }
230    return FALSE;
231}
232
233
234
235UnicodeString&
236DateIntervalFormat::format(const Formattable& obj,
237                           UnicodeString& appendTo,
238                           FieldPosition& fieldPosition,
239                           UErrorCode& status) const {
240    if ( U_FAILURE(status) ) {
241        return appendTo;
242    }
243
244    if ( obj.getType() == Formattable::kObject ) {
245        const UObject* formatObj = obj.getObject();
246        const DateInterval* interval = dynamic_cast<const DateInterval*>(formatObj);
247        if (interval != NULL){
248            return format(interval, appendTo, fieldPosition, status);
249        }
250    }
251    status = U_ILLEGAL_ARGUMENT_ERROR;
252    return appendTo;
253}
254
255
256UnicodeString&
257DateIntervalFormat::format(const DateInterval* dtInterval,
258                           UnicodeString& appendTo,
259                           FieldPosition& fieldPosition,
260                           UErrorCode& status) const {
261    if ( U_FAILURE(status) ) {
262        return appendTo;
263    }
264
265    if ( fFromCalendar != NULL && fToCalendar != NULL &&
266         fDateFormat != NULL && fInfo != NULL ) {
267        fFromCalendar->setTime(dtInterval->getFromDate(), status);
268        fToCalendar->setTime(dtInterval->getToDate(), status);
269        if ( U_SUCCESS(status) ) {
270            return format(*fFromCalendar, *fToCalendar, appendTo,fieldPosition, status);
271        }
272    }
273    return appendTo;
274}
275
276
277UnicodeString&
278DateIntervalFormat::format(Calendar& fromCalendar,
279                           Calendar& toCalendar,
280                           UnicodeString& appendTo,
281                           FieldPosition& pos,
282                           UErrorCode& status) const {
283    if ( U_FAILURE(status) ) {
284        return appendTo;
285    }
286
287    // not support different calendar types and time zones
288    //if ( fromCalendar.getType() != toCalendar.getType() ) {
289    if ( !fromCalendar.isEquivalentTo(toCalendar) ) {
290        status = U_ILLEGAL_ARGUMENT_ERROR;
291        return appendTo;
292    }
293
294    // First, find the largest different calendar field.
295    UCalendarDateFields field = UCAL_FIELD_COUNT;
296
297    if ( fromCalendar.get(UCAL_ERA,status) != toCalendar.get(UCAL_ERA,status)) {
298        field = UCAL_ERA;
299    } else if ( fromCalendar.get(UCAL_YEAR, status) !=
300                toCalendar.get(UCAL_YEAR, status) ) {
301        field = UCAL_YEAR;
302    } else if ( fromCalendar.get(UCAL_MONTH, status) !=
303                toCalendar.get(UCAL_MONTH, status) ) {
304        field = UCAL_MONTH;
305    } else if ( fromCalendar.get(UCAL_DATE, status) !=
306                toCalendar.get(UCAL_DATE, status) ) {
307        field = UCAL_DATE;
308    } else if ( fromCalendar.get(UCAL_AM_PM, status) !=
309                toCalendar.get(UCAL_AM_PM, status) ) {
310        field = UCAL_AM_PM;
311    } else if ( fromCalendar.get(UCAL_HOUR, status) !=
312                toCalendar.get(UCAL_HOUR, status) ) {
313        field = UCAL_HOUR;
314    } else if ( fromCalendar.get(UCAL_MINUTE, status) !=
315                toCalendar.get(UCAL_MINUTE, status) ) {
316        field = UCAL_MINUTE;
317    }
318
319    if ( U_FAILURE(status) ) {
320        return appendTo;
321    }
322    if ( field == UCAL_FIELD_COUNT ) {
323        /* ignore the second/millisecond etc. small fields' difference.
324         * use single date when all the above are the same.
325         */
326        return fDateFormat->format(fromCalendar, appendTo, pos);
327    }
328
329    // following call should not set wrong status,
330    // all the pass-in fields are valid till here
331    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
332                                                                        status);
333    const PatternInfo& intervalPattern = fIntervalPatterns[itvPtnIndex];
334
335    if ( intervalPattern.firstPart.isEmpty() &&
336         intervalPattern.secondPart.isEmpty() ) {
337        if ( fDateFormat->isFieldUnitIgnored(field) ) {
338            /* the largest different calendar field is small than
339             * the smallest calendar field in pattern,
340             * return single date format.
341             */
342            return fDateFormat->format(fromCalendar, appendTo, pos);
343        }
344        return fallbackFormat(fromCalendar, toCalendar, appendTo, pos, status);
345    }
346    // If the first part in interval pattern is empty,
347    // the 2nd part of it saves the full-pattern used in fall-back.
348    // For a 'real' interval pattern, the first part will never be empty.
349    if ( intervalPattern.firstPart.isEmpty() ) {
350        // fall back
351        UnicodeString originalPattern;
352        fDateFormat->toPattern(originalPattern);
353        fDateFormat->applyPattern(intervalPattern.secondPart);
354        appendTo = fallbackFormat(fromCalendar, toCalendar, appendTo, pos, status);
355        fDateFormat->applyPattern(originalPattern);
356        return appendTo;
357    }
358    Calendar* firstCal;
359    Calendar* secondCal;
360    if ( intervalPattern.laterDateFirst ) {
361        firstCal = &toCalendar;
362        secondCal = &fromCalendar;
363    } else {
364        firstCal = &fromCalendar;
365        secondCal = &toCalendar;
366    }
367    // break the interval pattern into 2 parts,
368    // first part should not be empty,
369    UnicodeString originalPattern;
370    fDateFormat->toPattern(originalPattern);
371    fDateFormat->applyPattern(intervalPattern.firstPart);
372    fDateFormat->format(*firstCal, appendTo, pos);
373    if ( !intervalPattern.secondPart.isEmpty() ) {
374        fDateFormat->applyPattern(intervalPattern.secondPart);
375        fDateFormat->format(*secondCal, appendTo, pos);
376    }
377    fDateFormat->applyPattern(originalPattern);
378    return appendTo;
379}
380
381
382
383void
384DateIntervalFormat::parseObject(const UnicodeString& /* source */,
385                                Formattable& /* result */,
386                                ParsePosition& /* parse_pos */) const {
387    // parseObject(const UnicodeString&, Formattable&, UErrorCode&) const
388    // will set status as U_INVALID_FORMAT_ERROR if
389    // parse_pos is still 0
390}
391
392
393
394
395const DateIntervalInfo*
396DateIntervalFormat::getDateIntervalInfo() const {
397    return fInfo;
398}
399
400
401void
402DateIntervalFormat::setDateIntervalInfo(const DateIntervalInfo& newItvPattern,
403                                        UErrorCode& status) {
404    delete fInfo;
405    fInfo = new DateIntervalInfo(newItvPattern);
406    if ( fDateFormat ) {
407        initializePattern(status);
408    }
409}
410
411
412
413const DateFormat*
414DateIntervalFormat::getDateFormat() const {
415    return fDateFormat;
416}
417
418
419void
420DateIntervalFormat::adoptTimeZone(TimeZone* zone)
421{
422    if (fDateFormat != NULL) {
423        fDateFormat->adoptTimeZone(zone);
424    }
425    // The fDateFormat has the master calendar for the DateIntervalFormat and has
426    // ownership of any adopted TimeZone; fFromCalendar and fToCalendar are internal
427    // work clones of that calendar (and should not also be given ownership of the
428    // adopted TimeZone).
429    if (fFromCalendar) {
430    	fFromCalendar->setTimeZone(*zone);
431    }
432    if (fToCalendar) {
433    	fToCalendar->setTimeZone(*zone);
434    }
435}
436
437void
438DateIntervalFormat::setTimeZone(const TimeZone& zone)
439{
440    if (fDateFormat != NULL) {
441        fDateFormat->setTimeZone(zone);
442    }
443    // The fDateFormat has the master calendar for the DateIntervalFormat;
444    // fFromCalendar and fToCalendar are internal work clones of that calendar.
445    if (fFromCalendar) {
446    	fFromCalendar->setTimeZone(zone);
447    }
448    if (fToCalendar) {
449    	fToCalendar->setTimeZone(zone);
450    }
451}
452
453const TimeZone&
454DateIntervalFormat::getTimeZone() const
455{
456    if (fDateFormat != NULL) {
457        return fDateFormat->getTimeZone();
458    }
459    // If fDateFormat is NULL (unexpected), create default timezone.
460    return *(TimeZone::createDefault());
461}
462
463DateIntervalFormat::DateIntervalFormat(const Locale& locale,
464                                       DateIntervalInfo* dtItvInfo,
465                                       const UnicodeString* skeleton,
466                                       UErrorCode& status)
467:   fInfo(NULL),
468    fDateFormat(NULL),
469    fFromCalendar(NULL),
470    fToCalendar(NULL),
471    fDtpng(NULL)
472{
473    if ( U_FAILURE(status) ) {
474        delete dtItvInfo;
475        return;
476    }
477    fDtpng = DateTimePatternGenerator::createInstance(locale, status);
478    SimpleDateFormat* dtfmt = createSDFPatternInstance(*skeleton, locale,
479                                                    fDtpng, status);
480    if ( U_FAILURE(status) ) {
481        delete dtItvInfo;
482        delete fDtpng;
483        delete dtfmt;
484        return;
485    }
486    if ( dtfmt == NULL || dtItvInfo == NULL || fDtpng == NULL ) {
487        status = U_MEMORY_ALLOCATION_ERROR;
488        // safe to delete NULL
489        delete dtfmt;
490        delete dtItvInfo;
491        delete fDtpng;
492        return;
493    }
494    if ( skeleton ) {
495        fSkeleton = *skeleton;
496    }
497    fInfo = dtItvInfo;
498    fDateFormat = dtfmt;
499    if ( dtfmt->getCalendar() ) {
500        fFromCalendar = dtfmt->getCalendar()->clone();
501        fToCalendar = dtfmt->getCalendar()->clone();
502    } else {
503        fFromCalendar = NULL;
504        fToCalendar = NULL;
505    }
506    initializePattern(status);
507}
508
509
510SimpleDateFormat* U_EXPORT2
511DateIntervalFormat::createSDFPatternInstance(const UnicodeString& skeleton,
512                                             const Locale& locale,
513                                             DateTimePatternGenerator* dtpng,
514                                             UErrorCode& status)
515{
516    if ( U_FAILURE(status) ) {
517        return NULL;
518    }
519
520    const UnicodeString pattern = dtpng->getBestPattern(skeleton, status);
521    if ( U_FAILURE(status) ) {
522        return NULL;
523    }
524    SimpleDateFormat* dtfmt = new SimpleDateFormat(pattern, locale, status);
525    if ( U_FAILURE(status) ) {
526        delete dtfmt;
527        return NULL;
528    }
529    return dtfmt;
530}
531
532
533DateIntervalFormat* U_EXPORT2
534DateIntervalFormat::create(const Locale& locale,
535                           DateIntervalInfo* dtitvinf,
536                           const UnicodeString* skeleton,
537                           UErrorCode& status) {
538    DateIntervalFormat* f = new DateIntervalFormat(locale, dtitvinf,
539                                                   skeleton, status);
540    if ( f == NULL ) {
541        status = U_MEMORY_ALLOCATION_ERROR;
542        delete dtitvinf;
543    } else if ( U_FAILURE(status) ) {
544        // safe to delete f, although nothing acutally is saved
545        delete f;
546        f = 0;
547    }
548    return f;
549}
550
551
552
553/**
554 * Initialize interval patterns locale to this formatter
555 *
556 * This code is a bit complicated since
557 * 1. the interval patterns saved in resource bundle files are interval
558 *    patterns based on date or time only.
559 *    It does not have interval patterns based on both date and time.
560 *    Interval patterns on both date and time are algorithm generated.
561 *
562 *    For example, it has interval patterns on skeleton "dMy" and "hm",
563 *    but it does not have interval patterns on skeleton "dMyhm".
564 *
565 *    The rule to genearte interval patterns for both date and time skeleton are
566 *    1) when the year, month, or day differs, concatenate the two original
567 *    expressions with a separator between,
568 *    For example, interval pattern from "Jan 10, 2007 10:10 am"
569 *    to "Jan 11, 2007 10:10am" is
570 *    "Jan 10, 2007 10:10 am - Jan 11, 2007 10:10am"
571 *
572 *    2) otherwise, present the date followed by the range expression
573 *    for the time.
574 *    For example, interval pattern from "Jan 10, 2007 10:10 am"
575 *    to "Jan 10, 2007 11:10am" is
576 *    "Jan 10, 2007 10:10 am - 11:10am"
577 *
578 * 2. even a pattern does not request a certion calendar field,
579 *    the interval pattern needs to include such field if such fields are
580 *    different between 2 dates.
581 *    For example, a pattern/skeleton is "hm", but the interval pattern
582 *    includes year, month, and date when year, month, and date differs.
583 *
584 * @param status          output param set to success/failure code on exit
585 * @stable ICU 4.0
586 */
587void
588DateIntervalFormat::initializePattern(UErrorCode& status) {
589    if ( U_FAILURE(status) ) {
590        return;
591    }
592    const Locale& locale = fDateFormat->getSmpFmtLocale();
593    if ( fSkeleton.isEmpty() ) {
594        UnicodeString fullPattern;
595        fDateFormat->toPattern(fullPattern);
596#ifdef DTITVFMT_DEBUG
597    char result[1000];
598    char result_1[1000];
599    char mesg[2000];
600    fSkeleton.extract(0,  fSkeleton.length(), result, "UTF-8");
601    sprintf(mesg, "in getBestSkeleton: fSkeleton: %s; \n", result);
602    PRINTMESG(mesg)
603#endif
604        // fSkeleton is already set by createDateIntervalInstance()
605        // or by createInstance(UnicodeString skeleton, .... )
606        fSkeleton = fDtpng->getSkeleton(fullPattern, status);
607        if ( U_FAILURE(status) ) {
608            return;
609        }
610    }
611
612    // initialize the fIntervalPattern ordering
613    int8_t i;
614    for ( i = 0; i < DateIntervalInfo::kIPI_MAX_INDEX; ++i ) {
615        fIntervalPatterns[i].laterDateFirst = fInfo->getDefaultOrder();
616    }
617
618    /* Check whether the skeleton is a combination of date and time.
619     * For the complication reason 1 explained above.
620     */
621    UnicodeString dateSkeleton;
622    UnicodeString timeSkeleton;
623    UnicodeString normalizedTimeSkeleton;
624    UnicodeString normalizedDateSkeleton;
625
626
627    /* the difference between time skeleton and normalizedTimeSkeleton are:
628     * 1. (Formerly, normalized time skeleton folded 'H' to 'h'; no longer true)
629     * 2. 'a' is omitted in normalized time skeleton.
630     * 3. there is only one appearance for 'h' or 'H', 'm','v', 'z' in normalized
631     *    time skeleton
632     *
633     * The difference between date skeleton and normalizedDateSkeleton are:
634     * 1. both 'y' and 'd' appear only once in normalizeDateSkeleton
635     * 2. 'E' and 'EE' are normalized into 'EEE'
636     * 3. 'MM' is normalized into 'M'
637     */
638    getDateTimeSkeleton(fSkeleton, dateSkeleton, normalizedDateSkeleton,
639                        timeSkeleton, normalizedTimeSkeleton);
640
641#ifdef DTITVFMT_DEBUG
642    char result[1000];
643    char result_1[1000];
644    char mesg[2000];
645    fSkeleton.extract(0,  fSkeleton.length(), result, "UTF-8");
646    sprintf(mesg, "in getBestSkeleton: fSkeleton: %s; \n", result);
647    PRINTMESG(mesg)
648#endif
649
650
651    UBool found = setSeparateDateTimePtn(normalizedDateSkeleton,
652                                         normalizedTimeSkeleton);
653
654    if ( found == false ) {
655        // use fallback
656        // TODO: if user asks "m"(minute), but "d"(day) differ
657        if ( timeSkeleton.length() != 0 ) {
658            if ( dateSkeleton.length() == 0 ) {
659                // prefix with yMd
660                timeSkeleton.insert(0, gDateFormatSkeleton[DateFormat::kShort], -1);
661                UnicodeString pattern = fDtpng->getBestPattern(timeSkeleton, status);
662                if ( U_FAILURE(status) ) {
663                    return;
664                }
665                // for fall back interval patterns,
666                // the first part of the pattern is empty,
667                // the second part of the pattern is the full-pattern
668                // should be used in fall-back.
669                setPatternInfo(UCAL_DATE, NULL, &pattern, fInfo->getDefaultOrder());
670                setPatternInfo(UCAL_MONTH, NULL, &pattern, fInfo->getDefaultOrder());
671                setPatternInfo(UCAL_YEAR, NULL, &pattern, fInfo->getDefaultOrder());
672            } else {
673                // TODO: fall back
674            }
675        } else {
676            // TODO: fall back
677        }
678        return;
679    } // end of skeleton not found
680    // interval patterns for skeleton are found in resource
681    if ( timeSkeleton.length() == 0 ) {
682        // done
683    } else if ( dateSkeleton.length() == 0 ) {
684        // prefix with yMd
685        timeSkeleton.insert(0, gDateFormatSkeleton[DateFormat::kShort], -1);
686        UnicodeString pattern = fDtpng->getBestPattern(timeSkeleton, status);
687        if ( U_FAILURE(status) ) {
688            return;
689        }
690        // for fall back interval patterns,
691        // the first part of the pattern is empty,
692        // the second part of the pattern is the full-pattern
693        // should be used in fall-back.
694        setPatternInfo(UCAL_DATE, NULL, &pattern, fInfo->getDefaultOrder());
695        setPatternInfo(UCAL_MONTH, NULL, &pattern, fInfo->getDefaultOrder());
696        setPatternInfo(UCAL_YEAR, NULL, &pattern, fInfo->getDefaultOrder());
697    } else {
698        /* if both present,
699         * 1) when the year, month, or day differs,
700         * concatenate the two original expressions with a separator between,
701         * 2) otherwise, present the date followed by the
702         * range expression for the time.
703         */
704        /*
705         * 1) when the year, month, or day differs,
706         * concatenate the two original expressions with a separator between,
707         */
708        // if field exists, use fall back
709        UnicodeString skeleton = fSkeleton;
710        if ( !fieldExistsInSkeleton(UCAL_DATE, dateSkeleton) ) {
711            // prefix skeleton with 'd'
712            skeleton.insert(0, LOW_D);
713            setFallbackPattern(UCAL_DATE, skeleton, status);
714        }
715        if ( !fieldExistsInSkeleton(UCAL_MONTH, dateSkeleton) ) {
716            // then prefix skeleton with 'M'
717            skeleton.insert(0, CAP_M);
718            setFallbackPattern(UCAL_MONTH, skeleton, status);
719        }
720        if ( !fieldExistsInSkeleton(UCAL_YEAR, dateSkeleton) ) {
721            // then prefix skeleton with 'y'
722            skeleton.insert(0, LOW_Y);
723            setFallbackPattern(UCAL_YEAR, skeleton, status);
724        }
725
726        /*
727         * 2) otherwise, present the date followed by the
728         * range expression for the time.
729         */
730        // Need the Date/Time pattern for concatnation the date with
731        // the time interval.
732        // The date/time pattern ( such as {0} {1} ) is saved in
733        // calendar, that is why need to get the CalendarData here.
734        CalendarData* calData = new CalendarData(locale, NULL, status);
735
736        if ( U_FAILURE(status) ) {
737            delete calData;
738            return;
739        }
740
741        if ( calData == NULL ) {
742            status = U_MEMORY_ALLOCATION_ERROR;
743            return;
744        }
745
746        const UResourceBundle* dateTimePatternsRes = calData->getByKey(
747                                           gDateTimePatternsTag, status);
748        int32_t dateTimeFormatLength;
749        const UChar* dateTimeFormat = ures_getStringByIndex(
750                                            dateTimePatternsRes,
751                                            (int32_t)DateFormat::kDateTime,
752                                            &dateTimeFormatLength, &status);
753        if ( U_FAILURE(status) ) {
754            return;
755        }
756
757        UnicodeString datePattern = fDtpng->getBestPattern(dateSkeleton, status);
758
759        concatSingleDate2TimeInterval(dateTimeFormat, dateTimeFormatLength,
760                                      datePattern, UCAL_AM_PM, status);
761        concatSingleDate2TimeInterval(dateTimeFormat, dateTimeFormatLength,
762                                      datePattern, UCAL_HOUR, status);
763        concatSingleDate2TimeInterval(dateTimeFormat, dateTimeFormatLength,
764                                      datePattern, UCAL_MINUTE, status);
765        delete calData;
766    }
767}
768
769
770
771void  U_EXPORT2
772DateIntervalFormat::getDateTimeSkeleton(const UnicodeString& skeleton,
773                                        UnicodeString& dateSkeleton,
774                                        UnicodeString& normalizedDateSkeleton,
775                                        UnicodeString& timeSkeleton,
776                                        UnicodeString& normalizedTimeSkeleton) {
777    // dateSkeleton follows the sequence of y*M*E*d*
778    // timeSkeleton follows the sequence of hm*[v|z]?
779    int32_t ECount = 0;
780    int32_t dCount = 0;
781    int32_t MCount = 0;
782    int32_t yCount = 0;
783    int32_t hCount = 0;
784    int32_t HCount = 0;
785    int32_t mCount = 0;
786    int32_t vCount = 0;
787    int32_t zCount = 0;
788    int32_t i;
789
790    for (i = 0; i < skeleton.length(); ++i) {
791        UChar ch = skeleton[i];
792        switch ( ch ) {
793          case CAP_E:
794            dateSkeleton.append(ch);
795            ++ECount;
796            break;
797          case LOW_D:
798            dateSkeleton.append(ch);
799            ++dCount;
800            break;
801          case CAP_M:
802            dateSkeleton.append(ch);
803            ++MCount;
804            break;
805          case LOW_Y:
806            dateSkeleton.append(ch);
807            ++yCount;
808            break;
809          case CAP_G:
810          case CAP_Y:
811          case LOW_U:
812          case CAP_Q:
813          case LOW_Q:
814          case CAP_L:
815          case LOW_L:
816          case CAP_W:
817          case LOW_W:
818          case CAP_D:
819          case CAP_F:
820          case LOW_G:
821          case LOW_E:
822          case LOW_C:
823            normalizedDateSkeleton.append(ch);
824            dateSkeleton.append(ch);
825            break;
826          case LOW_A:
827            // 'a' is implicitly handled
828            timeSkeleton.append(ch);
829            break;
830          case LOW_H:
831            timeSkeleton.append(ch);
832            ++hCount;
833            break;
834          case CAP_H:
835            timeSkeleton.append(ch);
836            ++HCount;
837            break;
838          case LOW_M:
839            timeSkeleton.append(ch);
840            ++mCount;
841            break;
842          case LOW_Z:
843            ++zCount;
844            timeSkeleton.append(ch);
845            break;
846          case LOW_V:
847            ++vCount;
848            timeSkeleton.append(ch);
849            break;
850          case CAP_V:
851          case CAP_Z:
852          case LOW_K:
853          case CAP_K:
854          case LOW_J:
855          case LOW_S:
856          case CAP_S:
857          case CAP_A:
858            timeSkeleton.append(ch);
859            normalizedTimeSkeleton.append(ch);
860            break;
861        }
862    }
863
864    /* generate normalized form for date*/
865    if ( yCount != 0 ) {
866        normalizedDateSkeleton.append(LOW_Y);
867    }
868    if ( MCount != 0 ) {
869        if ( MCount < 3 ) {
870            normalizedDateSkeleton.append(CAP_M);
871        } else {
872            int32_t i;
873            for ( i = 0; i < MCount && i < MAX_M_COUNT; ++i ) {
874                 normalizedDateSkeleton.append(CAP_M);
875            }
876        }
877    }
878    if ( ECount != 0 ) {
879        if ( ECount <= 3 ) {
880            normalizedDateSkeleton.append(CAP_E);
881        } else {
882            int32_t i;
883            for ( i = 0; i < ECount && i < MAX_E_COUNT; ++i ) {
884                 normalizedDateSkeleton.append(CAP_E);
885            }
886        }
887    }
888    if ( dCount != 0 ) {
889        normalizedDateSkeleton.append(LOW_D);
890    }
891
892    /* generate normalized form for time */
893    if ( HCount != 0 ) {
894        normalizedTimeSkeleton.append(CAP_H);
895    }
896    else if ( hCount != 0 ) {
897        normalizedTimeSkeleton.append(LOW_H);
898    }
899    if ( mCount != 0 ) {
900        normalizedTimeSkeleton.append(LOW_M);
901    }
902    if ( zCount != 0 ) {
903        normalizedTimeSkeleton.append(LOW_Z);
904    }
905    if ( vCount != 0 ) {
906        normalizedTimeSkeleton.append(LOW_V);
907    }
908}
909
910
911/**
912 * Generate date or time interval pattern from resource,
913 * and set them into the interval pattern locale to this formatter.
914 *
915 * It needs to handle the following:
916 * 1. need to adjust field width.
917 *    For example, the interval patterns saved in DateIntervalInfo
918 *    includes "dMMMy", but not "dMMMMy".
919 *    Need to get interval patterns for dMMMMy from dMMMy.
920 *    Another example, the interval patterns saved in DateIntervalInfo
921 *    includes "hmv", but not "hmz".
922 *    Need to get interval patterns for "hmz' from 'hmv'
923 *
924 * 2. there might be no pattern for 'y' differ for skeleton "Md",
925 *    in order to get interval patterns for 'y' differ,
926 *    need to look for it from skeleton 'yMd'
927 *
928 * @param dateSkeleton   normalized date skeleton
929 * @param timeSkeleton   normalized time skeleton
930 * @return               whether the resource is found for the skeleton.
931 *                       TRUE if interval pattern found for the skeleton,
932 *                       FALSE otherwise.
933 * @stable ICU 4.0
934 */
935UBool
936DateIntervalFormat::setSeparateDateTimePtn(
937                                 const UnicodeString& dateSkeleton,
938                                 const UnicodeString& timeSkeleton) {
939    const UnicodeString* skeleton;
940    // if both date and time skeleton present,
941    // the final interval pattern might include time interval patterns
942    // ( when, am_pm, hour, minute differ ),
943    // but not date interval patterns ( when year, month, day differ ).
944    // For year/month/day differ, it falls back to fall-back pattern.
945    if ( timeSkeleton.length() != 0  ) {
946        skeleton = &timeSkeleton;
947    } else {
948        skeleton = &dateSkeleton;
949    }
950
951    /* interval patterns for skeleton "dMMMy" (but not "dMMMMy")
952     * are defined in resource,
953     * interval patterns for skeleton "dMMMMy" are calculated by
954     * 1. get the best match skeleton for "dMMMMy", which is "dMMMy"
955     * 2. get the interval patterns for "dMMMy",
956     * 3. extend "MMM" to "MMMM" in above interval patterns for "dMMMMy"
957     * getBestSkeleton() is step 1.
958     */
959    // best skeleton, and the difference information
960    int8_t differenceInfo = 0;
961    const UnicodeString* bestSkeleton = fInfo->getBestSkeleton(*skeleton,
962                                                               differenceInfo);
963    /* best skeleton could be NULL.
964       For example: in "ca" resource file,
965       interval format is defined as following
966           intervalFormats{
967                fallback{"{0} - {1}"}
968            }
969       there is no skeletons/interval patterns defined,
970       and the best skeleton match could be NULL
971     */
972    if ( bestSkeleton == NULL ) {
973        return false;
974    }
975
976    // difference:
977    // 0 means the best matched skeleton is the same as input skeleton
978    // 1 means the fields are the same, but field width are different
979    // 2 means the only difference between fields are v/z,
980    // -1 means there are other fields difference
981    if ( differenceInfo == -1 ) {
982        // skeleton has different fields, not only  v/z difference
983        return false;
984    }
985
986    if ( timeSkeleton.length() == 0 ) {
987        UnicodeString extendedSkeleton;
988        UnicodeString extendedBestSkeleton;
989        // only has date skeleton
990        setIntervalPattern(UCAL_DATE, skeleton, bestSkeleton, differenceInfo,
991                           &extendedSkeleton, &extendedBestSkeleton);
992
993        UBool extended = setIntervalPattern(UCAL_MONTH, skeleton, bestSkeleton,
994                                     differenceInfo,
995                                     &extendedSkeleton, &extendedBestSkeleton);
996
997        if ( extended ) {
998            bestSkeleton = &extendedBestSkeleton;
999            skeleton = &extendedSkeleton;
1000        }
1001        setIntervalPattern(UCAL_YEAR, skeleton, bestSkeleton, differenceInfo,
1002                           &extendedSkeleton, &extendedBestSkeleton);
1003    } else {
1004        setIntervalPattern(UCAL_MINUTE, skeleton, bestSkeleton, differenceInfo);
1005        setIntervalPattern(UCAL_HOUR, skeleton, bestSkeleton, differenceInfo);
1006        setIntervalPattern(UCAL_AM_PM, skeleton, bestSkeleton, differenceInfo);
1007    }
1008    return true;
1009}
1010
1011
1012
1013void
1014DateIntervalFormat::setFallbackPattern(UCalendarDateFields field,
1015                                       const UnicodeString& skeleton,
1016                                       UErrorCode& status) {
1017    if ( U_FAILURE(status) ) {
1018        return;
1019    }
1020    UnicodeString pattern = fDtpng->getBestPattern(skeleton, status);
1021    if ( U_FAILURE(status) ) {
1022        return;
1023    }
1024    setPatternInfo(field, NULL, &pattern, fInfo->getDefaultOrder());
1025}
1026
1027
1028
1029
1030void
1031DateIntervalFormat::setPatternInfo(UCalendarDateFields field,
1032                                   const UnicodeString* firstPart,
1033                                   const UnicodeString* secondPart,
1034                                   UBool laterDateFirst) {
1035    // for fall back interval patterns,
1036    // the first part of the pattern is empty,
1037    // the second part of the pattern is the full-pattern
1038    // should be used in fall-back.
1039    UErrorCode status = U_ZERO_ERROR;
1040    // following should not set any wrong status.
1041    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
1042                                                                        status);
1043    if ( U_FAILURE(status) ) {
1044        return;
1045    }
1046    PatternInfo& ptn = fIntervalPatterns[itvPtnIndex];
1047    if ( firstPart ) {
1048        ptn.firstPart = *firstPart;
1049    }
1050    if ( secondPart ) {
1051        ptn.secondPart = *secondPart;
1052    }
1053    ptn.laterDateFirst = laterDateFirst;
1054}
1055
1056void
1057DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1058                                       const UnicodeString& intervalPattern) {
1059    UBool order = fInfo->getDefaultOrder();
1060    setIntervalPattern(field, intervalPattern, order);
1061}
1062
1063
1064void
1065DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1066                                       const UnicodeString& intervalPattern,
1067                                       UBool laterDateFirst) {
1068    const UnicodeString* pattern = &intervalPattern;
1069    UBool order = laterDateFirst;
1070    // check for "latestFirst:" or "earliestFirst:" prefix
1071    int8_t prefixLength = sizeof(gLaterFirstPrefix)/sizeof(gLaterFirstPrefix[0]);
1072    int8_t earliestFirstLength = sizeof(gEarlierFirstPrefix)/sizeof(gEarlierFirstPrefix[0]);
1073    UnicodeString realPattern;
1074    if ( intervalPattern.startsWith(gLaterFirstPrefix, prefixLength) ) {
1075        order = true;
1076        intervalPattern.extract(prefixLength,
1077                                intervalPattern.length() - prefixLength,
1078                                realPattern);
1079        pattern = &realPattern;
1080    } else if ( intervalPattern.startsWith(gEarlierFirstPrefix,
1081                                           earliestFirstLength) ) {
1082        order = false;
1083        intervalPattern.extract(earliestFirstLength,
1084                                intervalPattern.length() - earliestFirstLength,
1085                                realPattern);
1086        pattern = &realPattern;
1087    }
1088
1089    int32_t splitPoint = splitPatternInto2Part(*pattern);
1090
1091    UnicodeString firstPart;
1092    UnicodeString secondPart;
1093    pattern->extract(0, splitPoint, firstPart);
1094    if ( splitPoint < pattern->length() ) {
1095        pattern->extract(splitPoint, pattern->length()-splitPoint, secondPart);
1096    }
1097    setPatternInfo(field, &firstPart, &secondPart, order);
1098}
1099
1100
1101
1102
1103/**
1104 * Generate interval pattern from existing resource
1105 *
1106 * It not only save the interval patterns,
1107 * but also return the extended skeleton and its best match skeleton.
1108 *
1109 * @param field           largest different calendar field
1110 * @param skeleton        skeleton
1111 * @param bestSkeleton    the best match skeleton which has interval pattern
1112 *                        defined in resource
1113 * @param differenceInfo  the difference between skeleton and best skeleton
1114 *         0 means the best matched skeleton is the same as input skeleton
1115 *         1 means the fields are the same, but field width are different
1116 *         2 means the only difference between fields are v/z,
1117 *        -1 means there are other fields difference
1118 *
1119 * @param extendedSkeleton      extended skeleton
1120 * @param extendedBestSkeleton  extended best match skeleton
1121 * @return                      whether the interval pattern is found
1122 *                              through extending skeleton or not.
1123 *                              TRUE if interval pattern is found by
1124 *                              extending skeleton, FALSE otherwise.
1125 * @stable ICU 4.0
1126 */
1127UBool
1128DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1129                                       const UnicodeString* skeleton,
1130                                       const UnicodeString* bestSkeleton,
1131                                       int8_t differenceInfo,
1132                                       UnicodeString* extendedSkeleton,
1133                                       UnicodeString* extendedBestSkeleton) {
1134    UErrorCode status = U_ZERO_ERROR;
1135    // following getIntervalPattern() should not generate error status
1136    UnicodeString pattern;
1137    fInfo->getIntervalPattern(*bestSkeleton, field, pattern, status);
1138    if ( pattern.isEmpty() ) {
1139        // single date
1140        if ( SimpleDateFormat::isFieldUnitIgnored(*bestSkeleton, field) ) {
1141            // do nothing, format will handle it
1142            return false;
1143        }
1144
1145        // for 24 hour system, interval patterns in resource file
1146        // might not include pattern when am_pm differ,
1147        // which should be the same as hour differ.
1148        // add it here for simplicity
1149        if ( field == UCAL_AM_PM ) {
1150            fInfo->getIntervalPattern(*bestSkeleton, UCAL_HOUR, pattern,status);
1151            if ( !pattern.isEmpty() ) {
1152                setIntervalPattern(field, pattern);
1153            }
1154            return false;
1155        }
1156        // else, looking for pattern when 'y' differ for 'dMMMM' skeleton,
1157        // first, get best match pattern "MMMd",
1158        // since there is no pattern for 'y' differs for skeleton 'MMMd',
1159        // need to look for it from skeleton 'yMMMd',
1160        // if found, adjust field width in interval pattern from
1161        // "MMM" to "MMMM".
1162        UChar fieldLetter = fgCalendarFieldToPatternLetter[field];
1163        if ( extendedSkeleton ) {
1164            *extendedSkeleton = *skeleton;
1165            *extendedBestSkeleton = *bestSkeleton;
1166            extendedSkeleton->insert(0, fieldLetter);
1167            extendedBestSkeleton->insert(0, fieldLetter);
1168            // for example, looking for patterns when 'y' differ for
1169            // skeleton "MMMM".
1170            fInfo->getIntervalPattern(*extendedBestSkeleton,field,pattern,status);
1171            if ( pattern.isEmpty() && differenceInfo == 0 ) {
1172                // if there is no skeleton "yMMMM" defined,
1173                // look for the best match skeleton, for example: "yMMM"
1174                const UnicodeString* tmpBest = fInfo->getBestSkeleton(
1175                                        *extendedBestSkeleton, differenceInfo);
1176                if ( tmpBest != 0 && differenceInfo != -1 ) {
1177                    fInfo->getIntervalPattern(*tmpBest, field, pattern, status);
1178                    bestSkeleton = tmpBest;
1179                }
1180            }
1181        }
1182    }
1183    if ( !pattern.isEmpty() ) {
1184        if ( differenceInfo != 0 ) {
1185            UnicodeString adjustIntervalPattern;
1186            adjustFieldWidth(*skeleton, *bestSkeleton, pattern, differenceInfo,
1187                              adjustIntervalPattern);
1188            setIntervalPattern(field, adjustIntervalPattern);
1189        } else {
1190            setIntervalPattern(field, pattern);
1191        }
1192        if ( extendedSkeleton && !extendedSkeleton->isEmpty() ) {
1193            return TRUE;
1194        }
1195    }
1196    return FALSE;
1197}
1198
1199
1200
1201int32_t  U_EXPORT2
1202DateIntervalFormat::splitPatternInto2Part(const UnicodeString& intervalPattern) {
1203    UBool inQuote = false;
1204    UChar prevCh = 0;
1205    int32_t count = 0;
1206
1207    /* repeatedPattern used to record whether a pattern has already seen.
1208       It is a pattern applies to first calendar if it is first time seen,
1209       otherwise, it is a pattern applies to the second calendar
1210     */
1211    UBool patternRepeated[] =
1212    {
1213    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1214             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1215    //   P   Q   R   S   T   U   V   W   X   Y   Z
1216         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1217    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1218         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1219    //   p   q   r   s   t   u   v   w   x   y   z
1220         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1221    };
1222
1223    int8_t PATTERN_CHAR_BASE = 0x41;
1224
1225    /* loop through the pattern string character by character looking for
1226     * the first repeated pattern letter, which breaks the interval pattern
1227     * into 2 parts.
1228     */
1229    int32_t i;
1230    UBool foundRepetition = false;
1231    for (i = 0; i < intervalPattern.length(); ++i) {
1232        UChar ch = intervalPattern.charAt(i);
1233
1234        if (ch != prevCh && count > 0) {
1235            // check the repeativeness of pattern letter
1236            UBool repeated = patternRepeated[(int)(prevCh - PATTERN_CHAR_BASE)];
1237            if ( repeated == FALSE ) {
1238                patternRepeated[prevCh - PATTERN_CHAR_BASE] = TRUE;
1239            } else {
1240                foundRepetition = true;
1241                break;
1242            }
1243            count = 0;
1244        }
1245        if (ch == '\'') {
1246            // Consecutive single quotes are a single quote literal,
1247            // either outside of quotes or between quotes
1248            if ((i+1) < intervalPattern.length() &&
1249                intervalPattern.charAt(i+1) == '\'') {
1250                ++i;
1251            } else {
1252                inQuote = ! inQuote;
1253            }
1254        }
1255        else if (!inQuote && ((ch >= 0x0061 /*'a'*/ && ch <= 0x007A /*'z'*/)
1256                    || (ch >= 0x0041 /*'A'*/ && ch <= 0x005A /*'Z'*/))) {
1257            // ch is a date-time pattern character
1258            prevCh = ch;
1259            ++count;
1260        }
1261    }
1262    // check last pattern char, distinguish
1263    // "dd MM" ( no repetition ),
1264    // "d-d"(last char repeated ), and
1265    // "d-d MM" ( repetition found )
1266    if ( count > 0 && foundRepetition == FALSE ) {
1267        if ( patternRepeated[(int)(prevCh - PATTERN_CHAR_BASE)] == FALSE ) {
1268            count = 0;
1269        }
1270    }
1271    return (i - count);
1272}
1273
1274
1275
1276UnicodeString&
1277DateIntervalFormat::fallbackFormat(Calendar& fromCalendar,
1278                                   Calendar& toCalendar,
1279                                   UnicodeString& appendTo,
1280                                   FieldPosition& pos,
1281                                   UErrorCode& status) const {
1282    if ( U_FAILURE(status) ) {
1283        return appendTo;
1284    }
1285    // the fall back
1286    // no need delete earlierDate and laterDate since they are adopted
1287    UnicodeString* earlierDate = new UnicodeString();
1288    *earlierDate = fDateFormat->format(fromCalendar, *earlierDate, pos);
1289    UnicodeString* laterDate = new UnicodeString();
1290    *laterDate = fDateFormat->format(toCalendar, *laterDate, pos);
1291    UnicodeString fallbackPattern;
1292    fInfo->getFallbackIntervalPattern(fallbackPattern);
1293    Formattable fmtArray[2];
1294    fmtArray[0].adoptString(earlierDate);
1295    fmtArray[1].adoptString(laterDate);
1296
1297    UnicodeString fallback;
1298    MessageFormat::format(fallbackPattern, fmtArray, 2, fallback, status);
1299    if ( U_SUCCESS(status) ) {
1300        appendTo.append(fallback);
1301    }
1302    return appendTo;
1303}
1304
1305
1306
1307
1308UBool  U_EXPORT2
1309DateIntervalFormat::fieldExistsInSkeleton(UCalendarDateFields field,
1310                                          const UnicodeString& skeleton)
1311{
1312    const UChar fieldChar = fgCalendarFieldToPatternLetter[field];
1313    return ( (skeleton.indexOf(fieldChar) == -1)?FALSE:TRUE ) ;
1314}
1315
1316
1317
1318void  U_EXPORT2
1319DateIntervalFormat::adjustFieldWidth(const UnicodeString& inputSkeleton,
1320                 const UnicodeString& bestMatchSkeleton,
1321                 const UnicodeString& bestIntervalPattern,
1322                 int8_t differenceInfo,
1323                 UnicodeString& adjustedPtn) {
1324    adjustedPtn = bestIntervalPattern;
1325    int32_t inputSkeletonFieldWidth[] =
1326    {
1327    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1328             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1329    //   P   Q   R   S   T   U   V   W   X   Y   Z
1330         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1331    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1332         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1333    //   p   q   r   s   t   u   v   w   x   y   z
1334         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1335    };
1336
1337    int32_t bestMatchSkeletonFieldWidth[] =
1338    {
1339    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1340             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1341    //   P   Q   R   S   T   U   V   W   X   Y   Z
1342         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1343    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1344         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1345    //   p   q   r   s   t   u   v   w   x   y   z
1346         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1347    };
1348
1349    DateIntervalInfo::parseSkeleton(inputSkeleton, inputSkeletonFieldWidth);
1350    DateIntervalInfo::parseSkeleton(bestMatchSkeleton, bestMatchSkeletonFieldWidth);
1351    if ( differenceInfo == 2 ) {
1352        adjustedPtn.findAndReplace(UnicodeString((UChar)0x76 /* v */),
1353                                   UnicodeString((UChar)0x7a /* z */));
1354    }
1355
1356    UBool inQuote = false;
1357    UChar prevCh = 0;
1358    int32_t count = 0;
1359
1360    const int8_t PATTERN_CHAR_BASE = 0x41;
1361
1362    // loop through the pattern string character by character
1363    int32_t adjustedPtnLength = adjustedPtn.length();
1364    int32_t i;
1365    for (i = 0; i < adjustedPtnLength; ++i) {
1366        UChar ch = adjustedPtn.charAt(i);
1367        if (ch != prevCh && count > 0) {
1368            // check the repeativeness of pattern letter
1369            UChar skeletonChar = prevCh;
1370            if ( skeletonChar ==  CAP_L ) {
1371                // there is no "L" (always be "M") in skeleton,
1372                // but there is "L" in pattern.
1373                // for skeleton "M+", the pattern might be "...L..."
1374                skeletonChar = CAP_M;
1375            }
1376            int32_t fieldCount = bestMatchSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1377            int32_t inputFieldCount = inputSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1378            if ( fieldCount == count && inputFieldCount > fieldCount ) {
1379                count = inputFieldCount - fieldCount;
1380                int32_t j;
1381                for ( j = 0; j < count; ++j ) {
1382                    adjustedPtn.insert(i, prevCh);
1383                }
1384                i += count;
1385                adjustedPtnLength += count;
1386            }
1387            count = 0;
1388        }
1389        if (ch == '\'') {
1390            // Consecutive single quotes are a single quote literal,
1391            // either outside of quotes or between quotes
1392            if ((i+1) < adjustedPtn.length() && adjustedPtn.charAt(i+1) == '\'') {
1393                ++i;
1394            } else {
1395                inQuote = ! inQuote;
1396            }
1397        }
1398        else if ( ! inQuote && ((ch >= 0x0061 /*'a'*/ && ch <= 0x007A /*'z'*/)
1399                    || (ch >= 0x0041 /*'A'*/ && ch <= 0x005A /*'Z'*/))) {
1400            // ch is a date-time pattern character
1401            prevCh = ch;
1402            ++count;
1403        }
1404    }
1405    if ( count > 0 ) {
1406        // last item
1407        // check the repeativeness of pattern letter
1408        UChar skeletonChar = prevCh;
1409        if ( skeletonChar == CAP_L ) {
1410            // there is no "L" (always be "M") in skeleton,
1411            // but there is "L" in pattern.
1412            // for skeleton "M+", the pattern might be "...L..."
1413            skeletonChar = CAP_M;
1414        }
1415        int32_t fieldCount = bestMatchSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1416        int32_t inputFieldCount = inputSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1417        if ( fieldCount == count && inputFieldCount > fieldCount ) {
1418            count = inputFieldCount - fieldCount;
1419            int32_t j;
1420            for ( j = 0; j < count; ++j ) {
1421                adjustedPtn.append(prevCh);
1422            }
1423        }
1424    }
1425}
1426
1427
1428
1429void
1430DateIntervalFormat::concatSingleDate2TimeInterval(const UChar* format,
1431                                              int32_t formatLen,
1432                                              const UnicodeString& datePattern,
1433                                              UCalendarDateFields field,
1434                                              UErrorCode& status) {
1435    // following should not set wrong status
1436    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
1437                                                                        status);
1438    if ( U_FAILURE(status) ) {
1439        return;
1440    }
1441    PatternInfo&  timeItvPtnInfo = fIntervalPatterns[itvPtnIndex];
1442    if ( !timeItvPtnInfo.firstPart.isEmpty() ) {
1443        // UnicodeString allocated here is adopted, so no need to delete
1444        UnicodeString* timeIntervalPattern = new UnicodeString(timeItvPtnInfo.firstPart);
1445        timeIntervalPattern->append(timeItvPtnInfo.secondPart);
1446        UnicodeString* dateStr = new UnicodeString(datePattern);
1447        Formattable fmtArray[2];
1448        fmtArray[0].adoptString(timeIntervalPattern);
1449        fmtArray[1].adoptString(dateStr);
1450        UnicodeString combinedPattern;
1451        MessageFormat::format(UnicodeString(TRUE, format, formatLen),
1452                              fmtArray, 2, combinedPattern, status);
1453        if ( U_FAILURE(status) ) {
1454            return;
1455        }
1456        setIntervalPattern(field, combinedPattern, timeItvPtnInfo.laterDateFirst);
1457    }
1458    // else: fall back
1459    // it should not happen if the interval format defined is valid
1460}
1461
1462
1463
1464const UChar
1465DateIntervalFormat::fgCalendarFieldToPatternLetter[] =
1466{
1467    /*GyM*/ CAP_G, LOW_Y, CAP_M,
1468    /*wWd*/ LOW_W, CAP_W, LOW_D,
1469    /*DEF*/ CAP_D, CAP_E, CAP_F,
1470    /*ahH*/ LOW_A, LOW_H, CAP_H,
1471    /*m..*/ LOW_M,
1472};
1473
1474
1475U_NAMESPACE_END
1476
1477#endif
1478