1/*******************************************************************************
2* Copyright (C) 2008-2014, 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    DateFormat *df = DateFormat::internalCreateInstanceForSkeleton(
517            skeleton, locale, *dtpng, status);
518    return static_cast<SimpleDateFormat *>(df);
519}
520
521
522DateIntervalFormat* U_EXPORT2
523DateIntervalFormat::create(const Locale& locale,
524                           DateIntervalInfo* dtitvinf,
525                           const UnicodeString* skeleton,
526                           UErrorCode& status) {
527    DateIntervalFormat* f = new DateIntervalFormat(locale, dtitvinf,
528                                                   skeleton, status);
529    if ( f == NULL ) {
530        status = U_MEMORY_ALLOCATION_ERROR;
531        delete dtitvinf;
532    } else if ( U_FAILURE(status) ) {
533        // safe to delete f, although nothing acutally is saved
534        delete f;
535        f = 0;
536    }
537    return f;
538}
539
540
541
542/**
543 * Initialize interval patterns locale to this formatter
544 *
545 * This code is a bit complicated since
546 * 1. the interval patterns saved in resource bundle files are interval
547 *    patterns based on date or time only.
548 *    It does not have interval patterns based on both date and time.
549 *    Interval patterns on both date and time are algorithm generated.
550 *
551 *    For example, it has interval patterns on skeleton "dMy" and "hm",
552 *    but it does not have interval patterns on skeleton "dMyhm".
553 *
554 *    The rule to genearte interval patterns for both date and time skeleton are
555 *    1) when the year, month, or day differs, concatenate the two original
556 *    expressions with a separator between,
557 *    For example, interval pattern from "Jan 10, 2007 10:10 am"
558 *    to "Jan 11, 2007 10:10am" is
559 *    "Jan 10, 2007 10:10 am - Jan 11, 2007 10:10am"
560 *
561 *    2) otherwise, present the date followed by the range expression
562 *    for the time.
563 *    For example, interval pattern from "Jan 10, 2007 10:10 am"
564 *    to "Jan 10, 2007 11:10am" is
565 *    "Jan 10, 2007 10:10 am - 11:10am"
566 *
567 * 2. even a pattern does not request a certion calendar field,
568 *    the interval pattern needs to include such field if such fields are
569 *    different between 2 dates.
570 *    For example, a pattern/skeleton is "hm", but the interval pattern
571 *    includes year, month, and date when year, month, and date differs.
572 *
573 * @param status          output param set to success/failure code on exit
574 * @stable ICU 4.0
575 */
576void
577DateIntervalFormat::initializePattern(UErrorCode& status) {
578    if ( U_FAILURE(status) ) {
579        return;
580    }
581    const Locale& locale = fDateFormat->getSmpFmtLocale();
582    if ( fSkeleton.isEmpty() ) {
583        UnicodeString fullPattern;
584        fDateFormat->toPattern(fullPattern);
585#ifdef DTITVFMT_DEBUG
586    char result[1000];
587    char result_1[1000];
588    char mesg[2000];
589    fSkeleton.extract(0,  fSkeleton.length(), result, "UTF-8");
590    sprintf(mesg, "in getBestSkeleton: fSkeleton: %s; \n", result);
591    PRINTMESG(mesg)
592#endif
593        // fSkeleton is already set by createDateIntervalInstance()
594        // or by createInstance(UnicodeString skeleton, .... )
595        fSkeleton = fDtpng->getSkeleton(fullPattern, status);
596        if ( U_FAILURE(status) ) {
597            return;
598        }
599    }
600
601    // initialize the fIntervalPattern ordering
602    int8_t i;
603    for ( i = 0; i < DateIntervalInfo::kIPI_MAX_INDEX; ++i ) {
604        fIntervalPatterns[i].laterDateFirst = fInfo->getDefaultOrder();
605    }
606
607    /* Check whether the skeleton is a combination of date and time.
608     * For the complication reason 1 explained above.
609     */
610    UnicodeString dateSkeleton;
611    UnicodeString timeSkeleton;
612    UnicodeString normalizedTimeSkeleton;
613    UnicodeString normalizedDateSkeleton;
614
615
616    /* the difference between time skeleton and normalizedTimeSkeleton are:
617     * 1. (Formerly, normalized time skeleton folded 'H' to 'h'; no longer true)
618     * 2. 'a' is omitted in normalized time skeleton.
619     * 3. there is only one appearance for 'h' or 'H', 'm','v', 'z' in normalized
620     *    time skeleton
621     *
622     * The difference between date skeleton and normalizedDateSkeleton are:
623     * 1. both 'y' and 'd' appear only once in normalizeDateSkeleton
624     * 2. 'E' and 'EE' are normalized into 'EEE'
625     * 3. 'MM' is normalized into 'M'
626     */
627    getDateTimeSkeleton(fSkeleton, dateSkeleton, normalizedDateSkeleton,
628                        timeSkeleton, normalizedTimeSkeleton);
629
630#ifdef DTITVFMT_DEBUG
631    char result[1000];
632    char result_1[1000];
633    char mesg[2000];
634    fSkeleton.extract(0,  fSkeleton.length(), result, "UTF-8");
635    sprintf(mesg, "in getBestSkeleton: fSkeleton: %s; \n", result);
636    PRINTMESG(mesg)
637#endif
638
639
640    UBool found = setSeparateDateTimePtn(normalizedDateSkeleton,
641                                         normalizedTimeSkeleton);
642
643    if ( found == false ) {
644        // use fallback
645        // TODO: if user asks "m"(minute), but "d"(day) differ
646        if ( timeSkeleton.length() != 0 ) {
647            if ( dateSkeleton.length() == 0 ) {
648                // prefix with yMd
649                timeSkeleton.insert(0, gDateFormatSkeleton[DateFormat::kShort], -1);
650                UnicodeString pattern = fDtpng->getBestPattern(timeSkeleton, status);
651                if ( U_FAILURE(status) ) {
652                    return;
653                }
654                // for fall back interval patterns,
655                // the first part of the pattern is empty,
656                // the second part of the pattern is the full-pattern
657                // should be used in fall-back.
658                setPatternInfo(UCAL_DATE, NULL, &pattern, fInfo->getDefaultOrder());
659                setPatternInfo(UCAL_MONTH, NULL, &pattern, fInfo->getDefaultOrder());
660                setPatternInfo(UCAL_YEAR, NULL, &pattern, fInfo->getDefaultOrder());
661            } else {
662                // TODO: fall back
663            }
664        } else {
665            // TODO: fall back
666        }
667        return;
668    } // end of skeleton not found
669    // interval patterns for skeleton are found in resource
670    if ( timeSkeleton.length() == 0 ) {
671        // done
672    } else if ( dateSkeleton.length() == 0 ) {
673        // prefix with yMd
674        timeSkeleton.insert(0, gDateFormatSkeleton[DateFormat::kShort], -1);
675        UnicodeString pattern = fDtpng->getBestPattern(timeSkeleton, status);
676        if ( U_FAILURE(status) ) {
677            return;
678        }
679        // for fall back interval patterns,
680        // the first part of the pattern is empty,
681        // the second part of the pattern is the full-pattern
682        // should be used in fall-back.
683        setPatternInfo(UCAL_DATE, NULL, &pattern, fInfo->getDefaultOrder());
684        setPatternInfo(UCAL_MONTH, NULL, &pattern, fInfo->getDefaultOrder());
685        setPatternInfo(UCAL_YEAR, NULL, &pattern, fInfo->getDefaultOrder());
686    } else {
687        /* if both present,
688         * 1) when the year, month, or day differs,
689         * concatenate the two original expressions with a separator between,
690         * 2) otherwise, present the date followed by the
691         * range expression for the time.
692         */
693        /*
694         * 1) when the year, month, or day differs,
695         * concatenate the two original expressions with a separator between,
696         */
697        // if field exists, use fall back
698        UnicodeString skeleton = fSkeleton;
699        if ( !fieldExistsInSkeleton(UCAL_DATE, dateSkeleton) ) {
700            // prefix skeleton with 'd'
701            skeleton.insert(0, LOW_D);
702            setFallbackPattern(UCAL_DATE, skeleton, status);
703        }
704        if ( !fieldExistsInSkeleton(UCAL_MONTH, dateSkeleton) ) {
705            // then prefix skeleton with 'M'
706            skeleton.insert(0, CAP_M);
707            setFallbackPattern(UCAL_MONTH, skeleton, status);
708        }
709        if ( !fieldExistsInSkeleton(UCAL_YEAR, dateSkeleton) ) {
710            // then prefix skeleton with 'y'
711            skeleton.insert(0, LOW_Y);
712            setFallbackPattern(UCAL_YEAR, skeleton, status);
713        }
714
715        /*
716         * 2) otherwise, present the date followed by the
717         * range expression for the time.
718         */
719        // Need the Date/Time pattern for concatnation the date with
720        // the time interval.
721        // The date/time pattern ( such as {0} {1} ) is saved in
722        // calendar, that is why need to get the CalendarData here.
723        CalendarData* calData = new CalendarData(locale, NULL, status);
724
725        if ( U_FAILURE(status) ) {
726            delete calData;
727            return;
728        }
729
730        if ( calData == NULL ) {
731            status = U_MEMORY_ALLOCATION_ERROR;
732            return;
733        }
734
735        const UResourceBundle* dateTimePatternsRes = calData->getByKey(
736                                           gDateTimePatternsTag, status);
737        int32_t dateTimeFormatLength;
738        const UChar* dateTimeFormat = ures_getStringByIndex(
739                                            dateTimePatternsRes,
740                                            (int32_t)DateFormat::kDateTime,
741                                            &dateTimeFormatLength, &status);
742        if ( U_FAILURE(status) ) {
743            return;
744        }
745
746        UnicodeString datePattern = fDtpng->getBestPattern(dateSkeleton, status);
747
748        concatSingleDate2TimeInterval(dateTimeFormat, dateTimeFormatLength,
749                                      datePattern, UCAL_AM_PM, status);
750        concatSingleDate2TimeInterval(dateTimeFormat, dateTimeFormatLength,
751                                      datePattern, UCAL_HOUR, status);
752        concatSingleDate2TimeInterval(dateTimeFormat, dateTimeFormatLength,
753                                      datePattern, UCAL_MINUTE, status);
754        delete calData;
755    }
756}
757
758
759
760void  U_EXPORT2
761DateIntervalFormat::getDateTimeSkeleton(const UnicodeString& skeleton,
762                                        UnicodeString& dateSkeleton,
763                                        UnicodeString& normalizedDateSkeleton,
764                                        UnicodeString& timeSkeleton,
765                                        UnicodeString& normalizedTimeSkeleton) {
766    // dateSkeleton follows the sequence of y*M*E*d*
767    // timeSkeleton follows the sequence of hm*[v|z]?
768    int32_t ECount = 0;
769    int32_t dCount = 0;
770    int32_t MCount = 0;
771    int32_t yCount = 0;
772    int32_t hCount = 0;
773    int32_t HCount = 0;
774    int32_t mCount = 0;
775    int32_t vCount = 0;
776    int32_t zCount = 0;
777    int32_t i;
778
779    for (i = 0; i < skeleton.length(); ++i) {
780        UChar ch = skeleton[i];
781        switch ( ch ) {
782          case CAP_E:
783            dateSkeleton.append(ch);
784            ++ECount;
785            break;
786          case LOW_D:
787            dateSkeleton.append(ch);
788            ++dCount;
789            break;
790          case CAP_M:
791            dateSkeleton.append(ch);
792            ++MCount;
793            break;
794          case LOW_Y:
795            dateSkeleton.append(ch);
796            ++yCount;
797            break;
798          case CAP_G:
799          case CAP_Y:
800          case LOW_U:
801          case CAP_Q:
802          case LOW_Q:
803          case CAP_L:
804          case LOW_L:
805          case CAP_W:
806          case LOW_W:
807          case CAP_D:
808          case CAP_F:
809          case LOW_G:
810          case LOW_E:
811          case LOW_C:
812          case CAP_U:
813          case LOW_R:
814            normalizedDateSkeleton.append(ch);
815            dateSkeleton.append(ch);
816            break;
817          case LOW_A:
818            // 'a' is implicitly handled
819            timeSkeleton.append(ch);
820            break;
821          case LOW_H:
822            timeSkeleton.append(ch);
823            ++hCount;
824            break;
825          case CAP_H:
826            timeSkeleton.append(ch);
827            ++HCount;
828            break;
829          case LOW_M:
830            timeSkeleton.append(ch);
831            ++mCount;
832            break;
833          case LOW_Z:
834            ++zCount;
835            timeSkeleton.append(ch);
836            break;
837          case LOW_V:
838            ++vCount;
839            timeSkeleton.append(ch);
840            break;
841          case CAP_V:
842          case CAP_Z:
843          case LOW_K:
844          case CAP_K:
845          case LOW_J:
846          case LOW_S:
847          case CAP_S:
848          case CAP_A:
849            timeSkeleton.append(ch);
850            normalizedTimeSkeleton.append(ch);
851            break;
852        }
853    }
854
855    /* generate normalized form for date*/
856    if ( yCount != 0 ) {
857        for (i = 0; i < yCount; ++i) {
858            normalizedDateSkeleton.append(LOW_Y);
859        }
860    }
861    if ( MCount != 0 ) {
862        if ( MCount < 3 ) {
863            normalizedDateSkeleton.append(CAP_M);
864        } else {
865            int32_t i;
866            for ( i = 0; i < MCount && i < MAX_M_COUNT; ++i ) {
867                 normalizedDateSkeleton.append(CAP_M);
868            }
869        }
870    }
871    if ( ECount != 0 ) {
872        if ( ECount <= 3 ) {
873            normalizedDateSkeleton.append(CAP_E);
874        } else {
875            int32_t i;
876            for ( i = 0; i < ECount && i < MAX_E_COUNT; ++i ) {
877                 normalizedDateSkeleton.append(CAP_E);
878            }
879        }
880    }
881    if ( dCount != 0 ) {
882        normalizedDateSkeleton.append(LOW_D);
883    }
884
885    /* generate normalized form for time */
886    if ( HCount != 0 ) {
887        normalizedTimeSkeleton.append(CAP_H);
888    }
889    else if ( hCount != 0 ) {
890        normalizedTimeSkeleton.append(LOW_H);
891    }
892    if ( mCount != 0 ) {
893        normalizedTimeSkeleton.append(LOW_M);
894    }
895    if ( zCount != 0 ) {
896        normalizedTimeSkeleton.append(LOW_Z);
897    }
898    if ( vCount != 0 ) {
899        normalizedTimeSkeleton.append(LOW_V);
900    }
901}
902
903
904/**
905 * Generate date or time interval pattern from resource,
906 * and set them into the interval pattern locale to this formatter.
907 *
908 * It needs to handle the following:
909 * 1. need to adjust field width.
910 *    For example, the interval patterns saved in DateIntervalInfo
911 *    includes "dMMMy", but not "dMMMMy".
912 *    Need to get interval patterns for dMMMMy from dMMMy.
913 *    Another example, the interval patterns saved in DateIntervalInfo
914 *    includes "hmv", but not "hmz".
915 *    Need to get interval patterns for "hmz' from 'hmv'
916 *
917 * 2. there might be no pattern for 'y' differ for skeleton "Md",
918 *    in order to get interval patterns for 'y' differ,
919 *    need to look for it from skeleton 'yMd'
920 *
921 * @param dateSkeleton   normalized date skeleton
922 * @param timeSkeleton   normalized time skeleton
923 * @return               whether the resource is found for the skeleton.
924 *                       TRUE if interval pattern found for the skeleton,
925 *                       FALSE otherwise.
926 * @stable ICU 4.0
927 */
928UBool
929DateIntervalFormat::setSeparateDateTimePtn(
930                                 const UnicodeString& dateSkeleton,
931                                 const UnicodeString& timeSkeleton) {
932    const UnicodeString* skeleton;
933    // if both date and time skeleton present,
934    // the final interval pattern might include time interval patterns
935    // ( when, am_pm, hour, minute differ ),
936    // but not date interval patterns ( when year, month, day differ ).
937    // For year/month/day differ, it falls back to fall-back pattern.
938    if ( timeSkeleton.length() != 0  ) {
939        skeleton = &timeSkeleton;
940    } else {
941        skeleton = &dateSkeleton;
942    }
943
944    /* interval patterns for skeleton "dMMMy" (but not "dMMMMy")
945     * are defined in resource,
946     * interval patterns for skeleton "dMMMMy" are calculated by
947     * 1. get the best match skeleton for "dMMMMy", which is "dMMMy"
948     * 2. get the interval patterns for "dMMMy",
949     * 3. extend "MMM" to "MMMM" in above interval patterns for "dMMMMy"
950     * getBestSkeleton() is step 1.
951     */
952    // best skeleton, and the difference information
953    int8_t differenceInfo = 0;
954    const UnicodeString* bestSkeleton = fInfo->getBestSkeleton(*skeleton,
955                                                               differenceInfo);
956    /* best skeleton could be NULL.
957       For example: in "ca" resource file,
958       interval format is defined as following
959           intervalFormats{
960                fallback{"{0} - {1}"}
961            }
962       there is no skeletons/interval patterns defined,
963       and the best skeleton match could be NULL
964     */
965    if ( bestSkeleton == NULL ) {
966        return false;
967    }
968
969    // difference:
970    // 0 means the best matched skeleton is the same as input skeleton
971    // 1 means the fields are the same, but field width are different
972    // 2 means the only difference between fields are v/z,
973    // -1 means there are other fields difference
974    if ( differenceInfo == -1 ) {
975        // skeleton has different fields, not only  v/z difference
976        return false;
977    }
978
979    if ( timeSkeleton.length() == 0 ) {
980        UnicodeString extendedSkeleton;
981        UnicodeString extendedBestSkeleton;
982        // only has date skeleton
983        setIntervalPattern(UCAL_DATE, skeleton, bestSkeleton, differenceInfo,
984                           &extendedSkeleton, &extendedBestSkeleton);
985
986        UBool extended = setIntervalPattern(UCAL_MONTH, skeleton, bestSkeleton,
987                                     differenceInfo,
988                                     &extendedSkeleton, &extendedBestSkeleton);
989
990        if ( extended ) {
991            bestSkeleton = &extendedBestSkeleton;
992            skeleton = &extendedSkeleton;
993        }
994        setIntervalPattern(UCAL_YEAR, skeleton, bestSkeleton, differenceInfo,
995                           &extendedSkeleton, &extendedBestSkeleton);
996    } else {
997        setIntervalPattern(UCAL_MINUTE, skeleton, bestSkeleton, differenceInfo);
998        setIntervalPattern(UCAL_HOUR, skeleton, bestSkeleton, differenceInfo);
999        setIntervalPattern(UCAL_AM_PM, skeleton, bestSkeleton, differenceInfo);
1000    }
1001    return true;
1002}
1003
1004
1005
1006void
1007DateIntervalFormat::setFallbackPattern(UCalendarDateFields field,
1008                                       const UnicodeString& skeleton,
1009                                       UErrorCode& status) {
1010    if ( U_FAILURE(status) ) {
1011        return;
1012    }
1013    UnicodeString pattern = fDtpng->getBestPattern(skeleton, status);
1014    if ( U_FAILURE(status) ) {
1015        return;
1016    }
1017    setPatternInfo(field, NULL, &pattern, fInfo->getDefaultOrder());
1018}
1019
1020
1021
1022
1023void
1024DateIntervalFormat::setPatternInfo(UCalendarDateFields field,
1025                                   const UnicodeString* firstPart,
1026                                   const UnicodeString* secondPart,
1027                                   UBool laterDateFirst) {
1028    // for fall back interval patterns,
1029    // the first part of the pattern is empty,
1030    // the second part of the pattern is the full-pattern
1031    // should be used in fall-back.
1032    UErrorCode status = U_ZERO_ERROR;
1033    // following should not set any wrong status.
1034    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
1035                                                                        status);
1036    if ( U_FAILURE(status) ) {
1037        return;
1038    }
1039    PatternInfo& ptn = fIntervalPatterns[itvPtnIndex];
1040    if ( firstPart ) {
1041        ptn.firstPart = *firstPart;
1042    }
1043    if ( secondPart ) {
1044        ptn.secondPart = *secondPart;
1045    }
1046    ptn.laterDateFirst = laterDateFirst;
1047}
1048
1049void
1050DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1051                                       const UnicodeString& intervalPattern) {
1052    UBool order = fInfo->getDefaultOrder();
1053    setIntervalPattern(field, intervalPattern, order);
1054}
1055
1056
1057void
1058DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1059                                       const UnicodeString& intervalPattern,
1060                                       UBool laterDateFirst) {
1061    const UnicodeString* pattern = &intervalPattern;
1062    UBool order = laterDateFirst;
1063    // check for "latestFirst:" or "earliestFirst:" prefix
1064    int8_t prefixLength = sizeof(gLaterFirstPrefix)/sizeof(gLaterFirstPrefix[0]);
1065    int8_t earliestFirstLength = sizeof(gEarlierFirstPrefix)/sizeof(gEarlierFirstPrefix[0]);
1066    UnicodeString realPattern;
1067    if ( intervalPattern.startsWith(gLaterFirstPrefix, prefixLength) ) {
1068        order = true;
1069        intervalPattern.extract(prefixLength,
1070                                intervalPattern.length() - prefixLength,
1071                                realPattern);
1072        pattern = &realPattern;
1073    } else if ( intervalPattern.startsWith(gEarlierFirstPrefix,
1074                                           earliestFirstLength) ) {
1075        order = false;
1076        intervalPattern.extract(earliestFirstLength,
1077                                intervalPattern.length() - earliestFirstLength,
1078                                realPattern);
1079        pattern = &realPattern;
1080    }
1081
1082    int32_t splitPoint = splitPatternInto2Part(*pattern);
1083
1084    UnicodeString firstPart;
1085    UnicodeString secondPart;
1086    pattern->extract(0, splitPoint, firstPart);
1087    if ( splitPoint < pattern->length() ) {
1088        pattern->extract(splitPoint, pattern->length()-splitPoint, secondPart);
1089    }
1090    setPatternInfo(field, &firstPart, &secondPart, order);
1091}
1092
1093
1094
1095
1096/**
1097 * Generate interval pattern from existing resource
1098 *
1099 * It not only save the interval patterns,
1100 * but also return the extended skeleton and its best match skeleton.
1101 *
1102 * @param field           largest different calendar field
1103 * @param skeleton        skeleton
1104 * @param bestSkeleton    the best match skeleton which has interval pattern
1105 *                        defined in resource
1106 * @param differenceInfo  the difference between skeleton and best skeleton
1107 *         0 means the best matched skeleton is the same as input skeleton
1108 *         1 means the fields are the same, but field width are different
1109 *         2 means the only difference between fields are v/z,
1110 *        -1 means there are other fields difference
1111 *
1112 * @param extendedSkeleton      extended skeleton
1113 * @param extendedBestSkeleton  extended best match skeleton
1114 * @return                      whether the interval pattern is found
1115 *                              through extending skeleton or not.
1116 *                              TRUE if interval pattern is found by
1117 *                              extending skeleton, FALSE otherwise.
1118 * @stable ICU 4.0
1119 */
1120UBool
1121DateIntervalFormat::setIntervalPattern(UCalendarDateFields field,
1122                                       const UnicodeString* skeleton,
1123                                       const UnicodeString* bestSkeleton,
1124                                       int8_t differenceInfo,
1125                                       UnicodeString* extendedSkeleton,
1126                                       UnicodeString* extendedBestSkeleton) {
1127    UErrorCode status = U_ZERO_ERROR;
1128    // following getIntervalPattern() should not generate error status
1129    UnicodeString pattern;
1130    fInfo->getIntervalPattern(*bestSkeleton, field, pattern, status);
1131    if ( pattern.isEmpty() ) {
1132        // single date
1133        if ( SimpleDateFormat::isFieldUnitIgnored(*bestSkeleton, field) ) {
1134            // do nothing, format will handle it
1135            return false;
1136        }
1137
1138        // for 24 hour system, interval patterns in resource file
1139        // might not include pattern when am_pm differ,
1140        // which should be the same as hour differ.
1141        // add it here for simplicity
1142        if ( field == UCAL_AM_PM ) {
1143            fInfo->getIntervalPattern(*bestSkeleton, UCAL_HOUR, pattern,status);
1144            if ( !pattern.isEmpty() ) {
1145                setIntervalPattern(field, pattern);
1146            }
1147            return false;
1148        }
1149        // else, looking for pattern when 'y' differ for 'dMMMM' skeleton,
1150        // first, get best match pattern "MMMd",
1151        // since there is no pattern for 'y' differs for skeleton 'MMMd',
1152        // need to look for it from skeleton 'yMMMd',
1153        // if found, adjust field width in interval pattern from
1154        // "MMM" to "MMMM".
1155        UChar fieldLetter = fgCalendarFieldToPatternLetter[field];
1156        if ( extendedSkeleton ) {
1157            *extendedSkeleton = *skeleton;
1158            *extendedBestSkeleton = *bestSkeleton;
1159            extendedSkeleton->insert(0, fieldLetter);
1160            extendedBestSkeleton->insert(0, fieldLetter);
1161            // for example, looking for patterns when 'y' differ for
1162            // skeleton "MMMM".
1163            fInfo->getIntervalPattern(*extendedBestSkeleton,field,pattern,status);
1164            if ( pattern.isEmpty() && differenceInfo == 0 ) {
1165                // if there is no skeleton "yMMMM" defined,
1166                // look for the best match skeleton, for example: "yMMM"
1167                const UnicodeString* tmpBest = fInfo->getBestSkeleton(
1168                                        *extendedBestSkeleton, differenceInfo);
1169                if ( tmpBest != 0 && differenceInfo != -1 ) {
1170                    fInfo->getIntervalPattern(*tmpBest, field, pattern, status);
1171                    bestSkeleton = tmpBest;
1172                }
1173            }
1174        }
1175    }
1176    if ( !pattern.isEmpty() ) {
1177        if ( differenceInfo != 0 ) {
1178            UnicodeString adjustIntervalPattern;
1179            adjustFieldWidth(*skeleton, *bestSkeleton, pattern, differenceInfo,
1180                              adjustIntervalPattern);
1181            setIntervalPattern(field, adjustIntervalPattern);
1182        } else {
1183            setIntervalPattern(field, pattern);
1184        }
1185        if ( extendedSkeleton && !extendedSkeleton->isEmpty() ) {
1186            return TRUE;
1187        }
1188    }
1189    return FALSE;
1190}
1191
1192
1193
1194int32_t  U_EXPORT2
1195DateIntervalFormat::splitPatternInto2Part(const UnicodeString& intervalPattern) {
1196    UBool inQuote = false;
1197    UChar prevCh = 0;
1198    int32_t count = 0;
1199
1200    /* repeatedPattern used to record whether a pattern has already seen.
1201       It is a pattern applies to first calendar if it is first time seen,
1202       otherwise, it is a pattern applies to the second calendar
1203     */
1204    UBool patternRepeated[] =
1205    {
1206    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1207             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1208    //   P   Q   R   S   T   U   V   W   X   Y   Z
1209         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1210    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1211         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1212    //   p   q   r   s   t   u   v   w   x   y   z
1213         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1214    };
1215
1216    int8_t PATTERN_CHAR_BASE = 0x41;
1217
1218    /* loop through the pattern string character by character looking for
1219     * the first repeated pattern letter, which breaks the interval pattern
1220     * into 2 parts.
1221     */
1222    int32_t i;
1223    UBool foundRepetition = false;
1224    for (i = 0; i < intervalPattern.length(); ++i) {
1225        UChar ch = intervalPattern.charAt(i);
1226
1227        if (ch != prevCh && count > 0) {
1228            // check the repeativeness of pattern letter
1229            UBool repeated = patternRepeated[(int)(prevCh - PATTERN_CHAR_BASE)];
1230            if ( repeated == FALSE ) {
1231                patternRepeated[prevCh - PATTERN_CHAR_BASE] = TRUE;
1232            } else {
1233                foundRepetition = true;
1234                break;
1235            }
1236            count = 0;
1237        }
1238        if (ch == '\'') {
1239            // Consecutive single quotes are a single quote literal,
1240            // either outside of quotes or between quotes
1241            if ((i+1) < intervalPattern.length() &&
1242                intervalPattern.charAt(i+1) == '\'') {
1243                ++i;
1244            } else {
1245                inQuote = ! inQuote;
1246            }
1247        }
1248        else if (!inQuote && ((ch >= 0x0061 /*'a'*/ && ch <= 0x007A /*'z'*/)
1249                    || (ch >= 0x0041 /*'A'*/ && ch <= 0x005A /*'Z'*/))) {
1250            // ch is a date-time pattern character
1251            prevCh = ch;
1252            ++count;
1253        }
1254    }
1255    // check last pattern char, distinguish
1256    // "dd MM" ( no repetition ),
1257    // "d-d"(last char repeated ), and
1258    // "d-d MM" ( repetition found )
1259    if ( count > 0 && foundRepetition == FALSE ) {
1260        if ( patternRepeated[(int)(prevCh - PATTERN_CHAR_BASE)] == FALSE ) {
1261            count = 0;
1262        }
1263    }
1264    return (i - count);
1265}
1266
1267
1268
1269UnicodeString&
1270DateIntervalFormat::fallbackFormat(Calendar& fromCalendar,
1271                                   Calendar& toCalendar,
1272                                   UnicodeString& appendTo,
1273                                   FieldPosition& pos,
1274                                   UErrorCode& status) const {
1275    if ( U_FAILURE(status) ) {
1276        return appendTo;
1277    }
1278    // the fall back
1279    // no need delete earlierDate and laterDate since they are adopted
1280    UnicodeString* earlierDate = new UnicodeString();
1281    *earlierDate = fDateFormat->format(fromCalendar, *earlierDate, pos);
1282    UnicodeString* laterDate = new UnicodeString();
1283    *laterDate = fDateFormat->format(toCalendar, *laterDate, pos);
1284    UnicodeString fallbackPattern;
1285    fInfo->getFallbackIntervalPattern(fallbackPattern);
1286    Formattable fmtArray[2];
1287    fmtArray[0].adoptString(earlierDate);
1288    fmtArray[1].adoptString(laterDate);
1289
1290    UnicodeString fallback;
1291    MessageFormat::format(fallbackPattern, fmtArray, 2, fallback, status);
1292    if ( U_SUCCESS(status) ) {
1293        appendTo.append(fallback);
1294    }
1295    return appendTo;
1296}
1297
1298
1299
1300
1301UBool  U_EXPORT2
1302DateIntervalFormat::fieldExistsInSkeleton(UCalendarDateFields field,
1303                                          const UnicodeString& skeleton)
1304{
1305    const UChar fieldChar = fgCalendarFieldToPatternLetter[field];
1306    return ( (skeleton.indexOf(fieldChar) == -1)?FALSE:TRUE ) ;
1307}
1308
1309
1310
1311void  U_EXPORT2
1312DateIntervalFormat::adjustFieldWidth(const UnicodeString& inputSkeleton,
1313                 const UnicodeString& bestMatchSkeleton,
1314                 const UnicodeString& bestIntervalPattern,
1315                 int8_t differenceInfo,
1316                 UnicodeString& adjustedPtn) {
1317    adjustedPtn = bestIntervalPattern;
1318    int32_t inputSkeletonFieldWidth[] =
1319    {
1320    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1321             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1322    //   P   Q   R   S   T   U   V   W   X   Y   Z
1323         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1324    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1325         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1326    //   p   q   r   s   t   u   v   w   x   y   z
1327         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1328    };
1329
1330    int32_t bestMatchSkeletonFieldWidth[] =
1331    {
1332    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
1333             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1334    //   P   Q   R   S   T   U   V   W   X   Y   Z
1335         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
1336    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
1337         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
1338    //   p   q   r   s   t   u   v   w   x   y   z
1339         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
1340    };
1341
1342    DateIntervalInfo::parseSkeleton(inputSkeleton, inputSkeletonFieldWidth);
1343    DateIntervalInfo::parseSkeleton(bestMatchSkeleton, bestMatchSkeletonFieldWidth);
1344    if ( differenceInfo == 2 ) {
1345        adjustedPtn.findAndReplace(UnicodeString((UChar)0x76 /* v */),
1346                                   UnicodeString((UChar)0x7a /* z */));
1347    }
1348
1349    UBool inQuote = false;
1350    UChar prevCh = 0;
1351    int32_t count = 0;
1352
1353    const int8_t PATTERN_CHAR_BASE = 0x41;
1354
1355    // loop through the pattern string character by character
1356    int32_t adjustedPtnLength = adjustedPtn.length();
1357    int32_t i;
1358    for (i = 0; i < adjustedPtnLength; ++i) {
1359        UChar ch = adjustedPtn.charAt(i);
1360        if (ch != prevCh && count > 0) {
1361            // check the repeativeness of pattern letter
1362            UChar skeletonChar = prevCh;
1363            if ( skeletonChar ==  CAP_L ) {
1364                // there is no "L" (always be "M") in skeleton,
1365                // but there is "L" in pattern.
1366                // for skeleton "M+", the pattern might be "...L..."
1367                skeletonChar = CAP_M;
1368            }
1369            int32_t fieldCount = bestMatchSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1370            int32_t inputFieldCount = inputSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1371            if ( fieldCount == count && inputFieldCount > fieldCount ) {
1372                count = inputFieldCount - fieldCount;
1373                int32_t j;
1374                for ( j = 0; j < count; ++j ) {
1375                    adjustedPtn.insert(i, prevCh);
1376                }
1377                i += count;
1378                adjustedPtnLength += count;
1379            }
1380            count = 0;
1381        }
1382        if (ch == '\'') {
1383            // Consecutive single quotes are a single quote literal,
1384            // either outside of quotes or between quotes
1385            if ((i+1) < adjustedPtn.length() && adjustedPtn.charAt(i+1) == '\'') {
1386                ++i;
1387            } else {
1388                inQuote = ! inQuote;
1389            }
1390        }
1391        else if ( ! inQuote && ((ch >= 0x0061 /*'a'*/ && ch <= 0x007A /*'z'*/)
1392                    || (ch >= 0x0041 /*'A'*/ && ch <= 0x005A /*'Z'*/))) {
1393            // ch is a date-time pattern character
1394            prevCh = ch;
1395            ++count;
1396        }
1397    }
1398    if ( count > 0 ) {
1399        // last item
1400        // check the repeativeness of pattern letter
1401        UChar skeletonChar = prevCh;
1402        if ( skeletonChar == CAP_L ) {
1403            // there is no "L" (always be "M") in skeleton,
1404            // but there is "L" in pattern.
1405            // for skeleton "M+", the pattern might be "...L..."
1406            skeletonChar = CAP_M;
1407        }
1408        int32_t fieldCount = bestMatchSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1409        int32_t inputFieldCount = inputSkeletonFieldWidth[(int)(skeletonChar - PATTERN_CHAR_BASE)];
1410        if ( fieldCount == count && inputFieldCount > fieldCount ) {
1411            count = inputFieldCount - fieldCount;
1412            int32_t j;
1413            for ( j = 0; j < count; ++j ) {
1414                adjustedPtn.append(prevCh);
1415            }
1416        }
1417    }
1418}
1419
1420
1421
1422void
1423DateIntervalFormat::concatSingleDate2TimeInterval(const UChar* format,
1424                                              int32_t formatLen,
1425                                              const UnicodeString& datePattern,
1426                                              UCalendarDateFields field,
1427                                              UErrorCode& status) {
1428    // following should not set wrong status
1429    int32_t itvPtnIndex = DateIntervalInfo::calendarFieldToIntervalIndex(field,
1430                                                                        status);
1431    if ( U_FAILURE(status) ) {
1432        return;
1433    }
1434    PatternInfo&  timeItvPtnInfo = fIntervalPatterns[itvPtnIndex];
1435    if ( !timeItvPtnInfo.firstPart.isEmpty() ) {
1436        // UnicodeString allocated here is adopted, so no need to delete
1437        UnicodeString* timeIntervalPattern = new UnicodeString(timeItvPtnInfo.firstPart);
1438        timeIntervalPattern->append(timeItvPtnInfo.secondPart);
1439        UnicodeString* dateStr = new UnicodeString(datePattern);
1440        Formattable fmtArray[2];
1441        fmtArray[0].adoptString(timeIntervalPattern);
1442        fmtArray[1].adoptString(dateStr);
1443        UnicodeString combinedPattern;
1444        MessageFormat::format(UnicodeString(TRUE, format, formatLen),
1445                              fmtArray, 2, combinedPattern, status);
1446        if ( U_FAILURE(status) ) {
1447            return;
1448        }
1449        setIntervalPattern(field, combinedPattern, timeItvPtnInfo.laterDateFirst);
1450    }
1451    // else: fall back
1452    // it should not happen if the interval format defined is valid
1453}
1454
1455
1456
1457const UChar
1458DateIntervalFormat::fgCalendarFieldToPatternLetter[] =
1459{
1460    /*GyM*/ CAP_G, LOW_Y, CAP_M,
1461    /*wWd*/ LOW_W, CAP_W, LOW_D,
1462    /*DEF*/ CAP_D, CAP_E, CAP_F,
1463    /*ahH*/ LOW_A, LOW_H, CAP_H,
1464    /*msS*/ LOW_M, LOW_S, CAP_S, // MINUTE, SECOND, MILLISECOND
1465    /*z.Y*/ LOW_Z, SPACE, CAP_Y, // ZONE_OFFSET, DST_OFFSET, YEAR_WOY,
1466    /*eug*/ LOW_E, LOW_U, LOW_G, // DOW_LOCAL, EXTENDED_YEAR, JULIAN_DAY,
1467    /*A..*/ CAP_A, SPACE, SPACE, // MILLISECONDS_IN_DAY, IS_LEAP_MONTH, FIELD_COUNT
1468};
1469
1470
1471U_NAMESPACE_END
1472
1473#endif
1474