1/*******************************************************************************
2* Copyright (C) 2008-2013, 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        for (i = 0; i < yCount; ++i) {
867            normalizedDateSkeleton.append(LOW_Y);
868        }
869    }
870    if ( MCount != 0 ) {
871        if ( MCount < 3 ) {
872            normalizedDateSkeleton.append(CAP_M);
873        } else {
874            int32_t i;
875            for ( i = 0; i < MCount && i < MAX_M_COUNT; ++i ) {
876                 normalizedDateSkeleton.append(CAP_M);
877            }
878        }
879    }
880    if ( ECount != 0 ) {
881        if ( ECount <= 3 ) {
882            normalizedDateSkeleton.append(CAP_E);
883        } else {
884            int32_t i;
885            for ( i = 0; i < ECount && i < MAX_E_COUNT; ++i ) {
886                 normalizedDateSkeleton.append(CAP_E);
887            }
888        }
889    }
890    if ( dCount != 0 ) {
891        normalizedDateSkeleton.append(LOW_D);
892    }
893
894    /* generate normalized form for time */
895    if ( HCount != 0 ) {
896        normalizedTimeSkeleton.append(CAP_H);
897    }
898    else if ( hCount != 0 ) {
899        normalizedTimeSkeleton.append(LOW_H);
900    }
901    if ( mCount != 0 ) {
902        normalizedTimeSkeleton.append(LOW_M);
903    }
904    if ( zCount != 0 ) {
905        normalizedTimeSkeleton.append(LOW_Z);
906    }
907    if ( vCount != 0 ) {
908        normalizedTimeSkeleton.append(LOW_V);
909    }
910}
911
912
913/**
914 * Generate date or time interval pattern from resource,
915 * and set them into the interval pattern locale to this formatter.
916 *
917 * It needs to handle the following:
918 * 1. need to adjust field width.
919 *    For example, the interval patterns saved in DateIntervalInfo
920 *    includes "dMMMy", but not "dMMMMy".
921 *    Need to get interval patterns for dMMMMy from dMMMy.
922 *    Another example, the interval patterns saved in DateIntervalInfo
923 *    includes "hmv", but not "hmz".
924 *    Need to get interval patterns for "hmz' from 'hmv'
925 *
926 * 2. there might be no pattern for 'y' differ for skeleton "Md",
927 *    in order to get interval patterns for 'y' differ,
928 *    need to look for it from skeleton 'yMd'
929 *
930 * @param dateSkeleton   normalized date skeleton
931 * @param timeSkeleton   normalized time skeleton
932 * @return               whether the resource is found for the skeleton.
933 *                       TRUE if interval pattern found for the skeleton,
934 *                       FALSE otherwise.
935 * @stable ICU 4.0
936 */
937UBool
938DateIntervalFormat::setSeparateDateTimePtn(
939                                 const UnicodeString& dateSkeleton,
940                                 const UnicodeString& timeSkeleton) {
941    const UnicodeString* skeleton;
942    // if both date and time skeleton present,
943    // the final interval pattern might include time interval patterns
944    // ( when, am_pm, hour, minute differ ),
945    // but not date interval patterns ( when year, month, day differ ).
946    // For year/month/day differ, it falls back to fall-back pattern.
947    if ( timeSkeleton.length() != 0  ) {
948        skeleton = &timeSkeleton;
949    } else {
950        skeleton = &dateSkeleton;
951    }
952
953    /* interval patterns for skeleton "dMMMy" (but not "dMMMMy")
954     * are defined in resource,
955     * interval patterns for skeleton "dMMMMy" are calculated by
956     * 1. get the best match skeleton for "dMMMMy", which is "dMMMy"
957     * 2. get the interval patterns for "dMMMy",
958     * 3. extend "MMM" to "MMMM" in above interval patterns for "dMMMMy"
959     * getBestSkeleton() is step 1.
960     */
961    // best skeleton, and the difference information
962    int8_t differenceInfo = 0;
963    const UnicodeString* bestSkeleton = fInfo->getBestSkeleton(*skeleton,
964                                                               differenceInfo);
965    /* best skeleton could be NULL.
966       For example: in "ca" resource file,
967       interval format is defined as following
968           intervalFormats{
969                fallback{"{0} - {1}"}
970            }
971       there is no skeletons/interval patterns defined,
972       and the best skeleton match could be NULL
973     */
974    if ( bestSkeleton == NULL ) {
975        return false;
976    }
977
978    // difference:
979    // 0 means the best matched skeleton is the same as input skeleton
980    // 1 means the fields are the same, but field width are different
981    // 2 means the only difference between fields are v/z,
982    // -1 means there are other fields difference
983    if ( differenceInfo == -1 ) {
984        // skeleton has different fields, not only  v/z difference
985        return false;
986    }
987
988    if ( timeSkeleton.length() == 0 ) {
989        UnicodeString extendedSkeleton;
990        UnicodeString extendedBestSkeleton;
991        // only has date skeleton
992        setIntervalPattern(UCAL_DATE, skeleton, bestSkeleton, differenceInfo,
993                           &extendedSkeleton, &extendedBestSkeleton);
994
995        UBool extended = setIntervalPattern(UCAL_MONTH, skeleton, bestSkeleton,
996                                     differenceInfo,
997                                     &extendedSkeleton, &extendedBestSkeleton);
998
999        if ( extended ) {
1000            bestSkeleton = &extendedBestSkeleton;
1001            skeleton = &extendedSkeleton;
1002        }
1003        setIntervalPattern(UCAL_YEAR, skeleton, bestSkeleton, differenceInfo,
1004                           &extendedSkeleton, &extendedBestSkeleton);
1005    } else {
1006        setIntervalPattern(UCAL_MINUTE, skeleton, bestSkeleton, differenceInfo);
1007        setIntervalPattern(UCAL_HOUR, skeleton, bestSkeleton, differenceInfo);
1008        setIntervalPattern(UCAL_AM_PM, skeleton, bestSkeleton, differenceInfo);
1009    }
1010    return true;
1011}
1012
1013
1014
1015void
1016DateIntervalFormat::setFallbackPattern(UCalendarDateFields field,
1017                                       const UnicodeString& skeleton,
1018                                       UErrorCode& status) {
1019    if ( U_FAILURE(status) ) {
1020        return;
1021    }
1022    UnicodeString pattern = fDtpng->getBestPattern(skeleton, status);
1023    if ( U_FAILURE(status) ) {
1024        return;
1025    }
1026    setPatternInfo(field, NULL, &pattern, fInfo->getDefaultOrder());
1027}
1028
1029
1030
1031
1032void
1033DateIntervalFormat::setPatternInfo(UCalendarDateFields field,
1034                                   const UnicodeString* firstPart,
1035                                   const UnicodeString* secondPart,
1036                                   UBool laterDateFirst) {
1037    // for fall back interval patterns,
1038    // the first part of the pattern is empty,
1039    // the second part of the pattern is the full-pattern
1040    // should be used in fall-back.
1041    UErrorCode status = U_ZERO_ERROR;
1042    // following should not set any wrong status.
1043    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
1044                                                                        status);
1045    if ( U_FAILURE(status) ) {
1046        return;
1047    }
1048    PatternInfo& ptn = fIntervalPatterns[itvPtnIndex];
1049    if ( firstPart ) {
1050        ptn.firstPart = *firstPart;
1051    }
1052    if ( secondPart ) {
1053        ptn.secondPart = *secondPart;
1054    }
1055    ptn.laterDateFirst = laterDateFirst;
1056}
1057
1058void
1059DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1060                                       const UnicodeString& intervalPattern) {
1061    UBool order = fInfo->getDefaultOrder();
1062    setIntervalPattern(field, intervalPattern, order);
1063}
1064
1065
1066void
1067DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1068                                       const UnicodeString& intervalPattern,
1069                                       UBool laterDateFirst) {
1070    const UnicodeString* pattern = &intervalPattern;
1071    UBool order = laterDateFirst;
1072    // check for "latestFirst:" or "earliestFirst:" prefix
1073    int8_t prefixLength = sizeof(gLaterFirstPrefix)/sizeof(gLaterFirstPrefix[0]);
1074    int8_t earliestFirstLength = sizeof(gEarlierFirstPrefix)/sizeof(gEarlierFirstPrefix[0]);
1075    UnicodeString realPattern;
1076    if ( intervalPattern.startsWith(gLaterFirstPrefix, prefixLength) ) {
1077        order = true;
1078        intervalPattern.extract(prefixLength,
1079                                intervalPattern.length() - prefixLength,
1080                                realPattern);
1081        pattern = &realPattern;
1082    } else if ( intervalPattern.startsWith(gEarlierFirstPrefix,
1083                                           earliestFirstLength) ) {
1084        order = false;
1085        intervalPattern.extract(earliestFirstLength,
1086                                intervalPattern.length() - earliestFirstLength,
1087                                realPattern);
1088        pattern = &realPattern;
1089    }
1090
1091    int32_t splitPoint = splitPatternInto2Part(*pattern);
1092
1093    UnicodeString firstPart;
1094    UnicodeString secondPart;
1095    pattern->extract(0, splitPoint, firstPart);
1096    if ( splitPoint < pattern->length() ) {
1097        pattern->extract(splitPoint, pattern->length()-splitPoint, secondPart);
1098    }
1099    setPatternInfo(field, &firstPart, &secondPart, order);
1100}
1101
1102
1103
1104
1105/**
1106 * Generate interval pattern from existing resource
1107 *
1108 * It not only save the interval patterns,
1109 * but also return the extended skeleton and its best match skeleton.
1110 *
1111 * @param field           largest different calendar field
1112 * @param skeleton        skeleton
1113 * @param bestSkeleton    the best match skeleton which has interval pattern
1114 *                        defined in resource
1115 * @param differenceInfo  the difference between skeleton and best skeleton
1116 *         0 means the best matched skeleton is the same as input skeleton
1117 *         1 means the fields are the same, but field width are different
1118 *         2 means the only difference between fields are v/z,
1119 *        -1 means there are other fields difference
1120 *
1121 * @param extendedSkeleton      extended skeleton
1122 * @param extendedBestSkeleton  extended best match skeleton
1123 * @return                      whether the interval pattern is found
1124 *                              through extending skeleton or not.
1125 *                              TRUE if interval pattern is found by
1126 *                              extending skeleton, FALSE otherwise.
1127 * @stable ICU 4.0
1128 */
1129UBool
1130DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1131                                       const UnicodeString* skeleton,
1132                                       const UnicodeString* bestSkeleton,
1133                                       int8_t differenceInfo,
1134                                       UnicodeString* extendedSkeleton,
1135                                       UnicodeString* extendedBestSkeleton) {
1136    UErrorCode status = U_ZERO_ERROR;
1137    // following getIntervalPattern() should not generate error status
1138    UnicodeString pattern;
1139    fInfo->getIntervalPattern(*bestSkeleton, field, pattern, status);
1140    if ( pattern.isEmpty() ) {
1141        // single date
1142        if ( SimpleDateFormat::isFieldUnitIgnored(*bestSkeleton, field) ) {
1143            // do nothing, format will handle it
1144            return false;
1145        }
1146
1147        // for 24 hour system, interval patterns in resource file
1148        // might not include pattern when am_pm differ,
1149        // which should be the same as hour differ.
1150        // add it here for simplicity
1151        if ( field == UCAL_AM_PM ) {
1152            fInfo->getIntervalPattern(*bestSkeleton, UCAL_HOUR, pattern,status);
1153            if ( !pattern.isEmpty() ) {
1154                setIntervalPattern(field, pattern);
1155            }
1156            return false;
1157        }
1158        // else, looking for pattern when 'y' differ for 'dMMMM' skeleton,
1159        // first, get best match pattern "MMMd",
1160        // since there is no pattern for 'y' differs for skeleton 'MMMd',
1161        // need to look for it from skeleton 'yMMMd',
1162        // if found, adjust field width in interval pattern from
1163        // "MMM" to "MMMM".
1164        UChar fieldLetter = fgCalendarFieldToPatternLetter[field];
1165        if ( extendedSkeleton ) {
1166            *extendedSkeleton = *skeleton;
1167            *extendedBestSkeleton = *bestSkeleton;
1168            extendedSkeleton->insert(0, fieldLetter);
1169            extendedBestSkeleton->insert(0, fieldLetter);
1170            // for example, looking for patterns when 'y' differ for
1171            // skeleton "MMMM".
1172            fInfo->getIntervalPattern(*extendedBestSkeleton,field,pattern,status);
1173            if ( pattern.isEmpty() && differenceInfo == 0 ) {
1174                // if there is no skeleton "yMMMM" defined,
1175                // look for the best match skeleton, for example: "yMMM"
1176                const UnicodeString* tmpBest = fInfo->getBestSkeleton(
1177                                        *extendedBestSkeleton, differenceInfo);
1178                if ( tmpBest != 0 && differenceInfo != -1 ) {
1179                    fInfo->getIntervalPattern(*tmpBest, field, pattern, status);
1180                    bestSkeleton = tmpBest;
1181                }
1182            }
1183        }
1184    }
1185    if ( !pattern.isEmpty() ) {
1186        if ( differenceInfo != 0 ) {
1187            UnicodeString adjustIntervalPattern;
1188            adjustFieldWidth(*skeleton, *bestSkeleton, pattern, differenceInfo,
1189                              adjustIntervalPattern);
1190            setIntervalPattern(field, adjustIntervalPattern);
1191        } else {
1192            setIntervalPattern(field, pattern);
1193        }
1194        if ( extendedSkeleton && !extendedSkeleton->isEmpty() ) {
1195            return TRUE;
1196        }
1197    }
1198    return FALSE;
1199}
1200
1201
1202
1203int32_t  U_EXPORT2
1204DateIntervalFormat::splitPatternInto2Part(const UnicodeString& intervalPattern) {
1205    UBool inQuote = false;
1206    UChar prevCh = 0;
1207    int32_t count = 0;
1208
1209    /* repeatedPattern used to record whether a pattern has already seen.
1210       It is a pattern applies to first calendar if it is first time seen,
1211       otherwise, it is a pattern applies to the second calendar
1212     */
1213    UBool patternRepeated[] =
1214    {
1215    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1216             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1217    //   P   Q   R   S   T   U   V   W   X   Y   Z
1218         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1219    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1220         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1221    //   p   q   r   s   t   u   v   w   x   y   z
1222         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1223    };
1224
1225    int8_t PATTERN_CHAR_BASE = 0x41;
1226
1227    /* loop through the pattern string character by character looking for
1228     * the first repeated pattern letter, which breaks the interval pattern
1229     * into 2 parts.
1230     */
1231    int32_t i;
1232    UBool foundRepetition = false;
1233    for (i = 0; i < intervalPattern.length(); ++i) {
1234        UChar ch = intervalPattern.charAt(i);
1235
1236        if (ch != prevCh && count > 0) {
1237            // check the repeativeness of pattern letter
1238            UBool repeated = patternRepeated[(int)(prevCh - PATTERN_CHAR_BASE)];
1239            if ( repeated == FALSE ) {
1240                patternRepeated[prevCh - PATTERN_CHAR_BASE] = TRUE;
1241            } else {
1242                foundRepetition = true;
1243                break;
1244            }
1245            count = 0;
1246        }
1247        if (ch == '\'') {
1248            // Consecutive single quotes are a single quote literal,
1249            // either outside of quotes or between quotes
1250            if ((i+1) < intervalPattern.length() &&
1251                intervalPattern.charAt(i+1) == '\'') {
1252                ++i;
1253            } else {
1254                inQuote = ! inQuote;
1255            }
1256        }
1257        else if (!inQuote && ((ch >= 0x0061 /*'a'*/ && ch <= 0x007A /*'z'*/)
1258                    || (ch >= 0x0041 /*'A'*/ && ch <= 0x005A /*'Z'*/))) {
1259            // ch is a date-time pattern character
1260            prevCh = ch;
1261            ++count;
1262        }
1263    }
1264    // check last pattern char, distinguish
1265    // "dd MM" ( no repetition ),
1266    // "d-d"(last char repeated ), and
1267    // "d-d MM" ( repetition found )
1268    if ( count > 0 && foundRepetition == FALSE ) {
1269        if ( patternRepeated[(int)(prevCh - PATTERN_CHAR_BASE)] == FALSE ) {
1270            count = 0;
1271        }
1272    }
1273    return (i - count);
1274}
1275
1276
1277
1278UnicodeString&
1279DateIntervalFormat::fallbackFormat(Calendar& fromCalendar,
1280                                   Calendar& toCalendar,
1281                                   UnicodeString& appendTo,
1282                                   FieldPosition& pos,
1283                                   UErrorCode& status) const {
1284    if ( U_FAILURE(status) ) {
1285        return appendTo;
1286    }
1287    // the fall back
1288    // no need delete earlierDate and laterDate since they are adopted
1289    UnicodeString* earlierDate = new UnicodeString();
1290    *earlierDate = fDateFormat->format(fromCalendar, *earlierDate, pos);
1291    UnicodeString* laterDate = new UnicodeString();
1292    *laterDate = fDateFormat->format(toCalendar, *laterDate, pos);
1293    UnicodeString fallbackPattern;
1294    fInfo->getFallbackIntervalPattern(fallbackPattern);
1295    Formattable fmtArray[2];
1296    fmtArray[0].adoptString(earlierDate);
1297    fmtArray[1].adoptString(laterDate);
1298
1299    UnicodeString fallback;
1300    MessageFormat::format(fallbackPattern, fmtArray, 2, fallback, status);
1301    if ( U_SUCCESS(status) ) {
1302        appendTo.append(fallback);
1303    }
1304    return appendTo;
1305}
1306
1307
1308
1309
1310UBool  U_EXPORT2
1311DateIntervalFormat::fieldExistsInSkeleton(UCalendarDateFields field,
1312                                          const UnicodeString& skeleton)
1313{
1314    const UChar fieldChar = fgCalendarFieldToPatternLetter[field];
1315    return ( (skeleton.indexOf(fieldChar) == -1)?FALSE:TRUE ) ;
1316}
1317
1318
1319
1320void  U_EXPORT2
1321DateIntervalFormat::adjustFieldWidth(const UnicodeString& inputSkeleton,
1322                 const UnicodeString& bestMatchSkeleton,
1323                 const UnicodeString& bestIntervalPattern,
1324                 int8_t differenceInfo,
1325                 UnicodeString& adjustedPtn) {
1326    adjustedPtn = bestIntervalPattern;
1327    int32_t inputSkeletonFieldWidth[] =
1328    {
1329    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1330             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1331    //   P   Q   R   S   T   U   V   W   X   Y   Z
1332         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1333    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1334         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1335    //   p   q   r   s   t   u   v   w   x   y   z
1336         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1337    };
1338
1339    int32_t bestMatchSkeletonFieldWidth[] =
1340    {
1341    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1342             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1343    //   P   Q   R   S   T   U   V   W   X   Y   Z
1344         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1345    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1346         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1347    //   p   q   r   s   t   u   v   w   x   y   z
1348         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1349    };
1350
1351    DateIntervalInfo::parseSkeleton(inputSkeleton, inputSkeletonFieldWidth);
1352    DateIntervalInfo::parseSkeleton(bestMatchSkeleton, bestMatchSkeletonFieldWidth);
1353    if ( differenceInfo == 2 ) {
1354        adjustedPtn.findAndReplace(UnicodeString((UChar)0x76 /* v */),
1355                                   UnicodeString((UChar)0x7a /* z */));
1356    }
1357
1358    UBool inQuote = false;
1359    UChar prevCh = 0;
1360    int32_t count = 0;
1361
1362    const int8_t PATTERN_CHAR_BASE = 0x41;
1363
1364    // loop through the pattern string character by character
1365    int32_t adjustedPtnLength = adjustedPtn.length();
1366    int32_t i;
1367    for (i = 0; i < adjustedPtnLength; ++i) {
1368        UChar ch = adjustedPtn.charAt(i);
1369        if (ch != prevCh && count > 0) {
1370            // check the repeativeness of pattern letter
1371            UChar skeletonChar = prevCh;
1372            if ( skeletonChar ==  CAP_L ) {
1373                // there is no "L" (always be "M") in skeleton,
1374                // but there is "L" in pattern.
1375                // for skeleton "M+", the pattern might be "...L..."
1376                skeletonChar = CAP_M;
1377            }
1378            int32_t fieldCount = bestMatchSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1379            int32_t inputFieldCount = inputSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1380            if ( fieldCount == count && inputFieldCount > fieldCount ) {
1381                count = inputFieldCount - fieldCount;
1382                int32_t j;
1383                for ( j = 0; j < count; ++j ) {
1384                    adjustedPtn.insert(i, prevCh);
1385                }
1386                i += count;
1387                adjustedPtnLength += count;
1388            }
1389            count = 0;
1390        }
1391        if (ch == '\'') {
1392            // Consecutive single quotes are a single quote literal,
1393            // either outside of quotes or between quotes
1394            if ((i+1) < adjustedPtn.length() && adjustedPtn.charAt(i+1) == '\'') {
1395                ++i;
1396            } else {
1397                inQuote = ! inQuote;
1398            }
1399        }
1400        else if ( ! inQuote && ((ch >= 0x0061 /*'a'*/ && ch <= 0x007A /*'z'*/)
1401                    || (ch >= 0x0041 /*'A'*/ && ch <= 0x005A /*'Z'*/))) {
1402            // ch is a date-time pattern character
1403            prevCh = ch;
1404            ++count;
1405        }
1406    }
1407    if ( count > 0 ) {
1408        // last item
1409        // check the repeativeness of pattern letter
1410        UChar skeletonChar = prevCh;
1411        if ( skeletonChar == CAP_L ) {
1412            // there is no "L" (always be "M") in skeleton,
1413            // but there is "L" in pattern.
1414            // for skeleton "M+", the pattern might be "...L..."
1415            skeletonChar = CAP_M;
1416        }
1417        int32_t fieldCount = bestMatchSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1418        int32_t inputFieldCount = inputSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1419        if ( fieldCount == count && inputFieldCount > fieldCount ) {
1420            count = inputFieldCount - fieldCount;
1421            int32_t j;
1422            for ( j = 0; j < count; ++j ) {
1423                adjustedPtn.append(prevCh);
1424            }
1425        }
1426    }
1427}
1428
1429
1430
1431void
1432DateIntervalFormat::concatSingleDate2TimeInterval(const UChar* format,
1433                                              int32_t formatLen,
1434                                              const UnicodeString& datePattern,
1435                                              UCalendarDateFields field,
1436                                              UErrorCode& status) {
1437    // following should not set wrong status
1438    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
1439                                                                        status);
1440    if ( U_FAILURE(status) ) {
1441        return;
1442    }
1443    PatternInfo&  timeItvPtnInfo = fIntervalPatterns[itvPtnIndex];
1444    if ( !timeItvPtnInfo.firstPart.isEmpty() ) {
1445        // UnicodeString allocated here is adopted, so no need to delete
1446        UnicodeString* timeIntervalPattern = new UnicodeString(timeItvPtnInfo.firstPart);
1447        timeIntervalPattern->append(timeItvPtnInfo.secondPart);
1448        UnicodeString* dateStr = new UnicodeString(datePattern);
1449        Formattable fmtArray[2];
1450        fmtArray[0].adoptString(timeIntervalPattern);
1451        fmtArray[1].adoptString(dateStr);
1452        UnicodeString combinedPattern;
1453        MessageFormat::format(UnicodeString(TRUE, format, formatLen),
1454                              fmtArray, 2, combinedPattern, status);
1455        if ( U_FAILURE(status) ) {
1456            return;
1457        }
1458        setIntervalPattern(field, combinedPattern, timeItvPtnInfo.laterDateFirst);
1459    }
1460    // else: fall back
1461    // it should not happen if the interval format defined is valid
1462}
1463
1464
1465
1466const UChar
1467DateIntervalFormat::fgCalendarFieldToPatternLetter[] =
1468{
1469    /*GyM*/ CAP_G, LOW_Y, CAP_M,
1470    /*wWd*/ LOW_W, CAP_W, LOW_D,
1471    /*DEF*/ CAP_D, CAP_E, CAP_F,
1472    /*ahH*/ LOW_A, LOW_H, CAP_H,
1473    /*m..*/ LOW_M,
1474};
1475
1476
1477U_NAMESPACE_END
1478
1479#endif
1480