[apple/icu.git] / icuSources / i18n / reldtfmt.cpp

/*
*******************************************************************************
* Copyright (C) 2007-2011, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

//#define DEBUG_RELDTFMT

#include <stdio.h>
#include <stdlib.h>

#include "reldtfmt.h"
#include "unicode/msgfmt.h"
#include "unicode/smpdtfmt.h"

#include "gregoimp.h" // for CalendarData
#include "cmemory.h"

U_NAMESPACE_BEGIN


/**
 * An array of URelativeString structs is used to store the resource data loaded out of the bundle.
 */
struct URelativeString {
    int32_t offset;         /** offset of this item, such as, the relative date **/
    int32_t len;            /** length of the string **/
    const UChar* string;    /** string, or NULL if not set **/
};

static const char DT_DateTimePatternsTag[]="DateTimePatterns";


UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RelativeDateFormat)

RelativeDateFormat::RelativeDateFormat(const RelativeDateFormat& other) :
DateFormat(other), fDateFormat(NULL), fTimeFormat(NULL), fCombinedFormat(NULL),
fDateStyle(other.fDateStyle), fTimeStyle(other.fTimeStyle), fLocale(other.fLocale),
fDayMin(other.fDayMin), fDayMax(other.fDayMax),
fDatesLen(other.fDatesLen), fDates(NULL)
{
    if(other.fDateFormat != NULL) {
        fDateFormat = (DateFormat*)other.fDateFormat->clone();
    } else {
        fDateFormat = NULL;
    }
    if (fDatesLen > 0) {
        fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);
        uprv_memcpy(fDates, other.fDates, sizeof(fDates[0])*fDatesLen);
    }
    //fCalendar = other.fCalendar->clone();
/*    
    if(other.fTimeFormat != NULL) {
        fTimeFormat = (DateFormat*)other.fTimeFormat->clone();
    } else {
        fTimeFormat = NULL;
    }
*/
}

RelativeDateFormat::RelativeDateFormat( UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const Locale& locale, UErrorCode& status)
 : DateFormat(), fDateFormat(NULL), fTimeFormat(NULL), fCombinedFormat(NULL),
fDateStyle(dateStyle), fTimeStyle(timeStyle), fLocale(locale), fDatesLen(0), fDates(NULL)
 {
    if(U_FAILURE(status) ) {
        return;
    }
    
    if(fDateStyle != UDAT_NONE) {
        EStyle newStyle = (EStyle)(fDateStyle & ~UDAT_RELATIVE);
        // Create a DateFormat in the non-relative style requested.
        fDateFormat = createDateInstance(newStyle, locale);
    }
    if(fTimeStyle >= UDAT_FULL && fTimeStyle <= UDAT_SHORT) {
        fTimeFormat = createTimeInstance((EStyle)fTimeStyle, locale);
    } else if(fTimeStyle != UDAT_NONE) {
        // don't support other time styles (e.g. relative styles), for now
        status = U_ILLEGAL_ARGUMENT_ERROR;
        return;
    }
    
    // Initialize the parent fCalendar, so that parse() works correctly.
    initializeCalendar(NULL, locale, status);
    loadDates(status);
}

RelativeDateFormat::~RelativeDateFormat() {
    delete fDateFormat;
    delete fTimeFormat;
    delete fCombinedFormat;
    uprv_free(fDates);
}


Format* RelativeDateFormat::clone(void) const {
    return new RelativeDateFormat(*this);
}

UBool RelativeDateFormat::operator==(const Format& other) const {
    if(DateFormat::operator==(other)) {
        // DateFormat::operator== guarantees following cast is safe
        RelativeDateFormat* that = (RelativeDateFormat*)&other;
        return (fDateStyle==that->fDateStyle   &&
                fTimeStyle==that->fTimeStyle   &&
                fLocale==that->fLocale);
    }
    return FALSE;
}

UnicodeString& RelativeDateFormat::format(  Calendar& cal,
                                UnicodeString& appendTo,
                                FieldPosition& pos) const {
                                
    UErrorCode status = U_ZERO_ERROR;
    UChar emptyStr = 0;
    UnicodeString dateString(&emptyStr);
    
    // calculate the difference, in days, between 'cal' and now.
    int dayDiff = dayDifference(cal, status);

    // look up string
    int32_t len = 0;
    const UChar *theString = getStringForDay(dayDiff, len, status);
    if(U_SUCCESS(status) && (theString!=NULL)) {
        // found a relative string
        dateString.setTo(theString, len);
    }
    
    if(fTimeFormat == NULL || fCombinedFormat == 0) {
        if (dateString.length() > 0) {
            appendTo.append(dateString);
        } else if(fDateFormat != NULL) {
            fDateFormat->format(cal,appendTo,pos);
        }
    } else {
        if (dateString.length() == 0 && fDateFormat != NULL) {
            fDateFormat->format(cal,dateString,pos);
        }
        UnicodeString timeString(&emptyStr);
        FieldPosition timepos = pos;
        fTimeFormat->format(cal,timeString,timepos);
        Formattable timeDateStrings[] = { timeString, dateString };
        fCombinedFormat->format(timeDateStrings, 2, appendTo, pos, status); // pos is ignored by this
        int32_t offset;
        if (pos.getEndIndex() > 0 && (offset = appendTo.indexOf(dateString)) >= 0) {
            // pos.field was found in dateString, offset start & end based on final position of dateString
            pos.setBeginIndex( pos.getBeginIndex() + offset );
            pos.setEndIndex( pos.getEndIndex() + offset );
        } else if (timepos.getEndIndex() > 0 && (offset = appendTo.indexOf(timeString)) >= 0) {
            // pos.field was found in timeString, offset start & end based on final position of timeString
            pos.setBeginIndex( timepos.getBeginIndex() + offset );
            pos.setEndIndex( timepos.getEndIndex() + offset );
        }
    }
    
    return appendTo;
}


UnicodeString&
RelativeDateFormat::format(const Formattable& obj, 
                         UnicodeString& appendTo, 
                         FieldPosition& pos,
                         UErrorCode& status) const
{
    // this is just here to get around the hiding problem
    // (the previous format() override would hide the version of
    // format() on DateFormat that this function correspond to, so we
    // have to redefine it here)
    return DateFormat::format(obj, appendTo, pos, status);
}


void RelativeDateFormat::parse( const UnicodeString& text,
                    Calendar& cal,
                    ParsePosition& pos) const {

    // Can the fDateFormat parse it?
    if(fDateFormat != NULL) {
        ParsePosition aPos(pos);
        fDateFormat->parse(text,cal,aPos);
        if((aPos.getIndex() != pos.getIndex()) && 
            (aPos.getErrorIndex()==-1)) {
                pos=aPos; // copy the sub parse
                return; // parsed subfmt OK
        }
    }
    
    // Linear search the relative strings
    for(int n=0;n<fDatesLen;n++) {
        if(fDates[n].string != NULL &&
            (0==text.compare(pos.getIndex(),
                         fDates[n].len,
                         fDates[n].string))) {
            UErrorCode status = U_ZERO_ERROR;
            
            // Set the calendar to now+offset
            cal.setTime(Calendar::getNow(),status);
            cal.add(UCAL_DATE,fDates[n].offset, status);
            
            if(U_FAILURE(status)) { 
                // failure in setting calendar fields
                pos.setErrorIndex(pos.getIndex()+fDates[n].len);
            } else {
                pos.setIndex(pos.getIndex()+fDates[n].len);
            }
            return;
        }
    }
    
    // parse failed
}

UDate
RelativeDateFormat::parse( const UnicodeString& text,
                         ParsePosition& pos) const {
    // redefined here because the other parse() function hides this function's
    // cunterpart on DateFormat
    return DateFormat::parse(text, pos);
}

UDate
RelativeDateFormat::parse(const UnicodeString& text, UErrorCode& status) const
{
    // redefined here because the other parse() function hides this function's
    // counterpart on DateFormat
    return DateFormat::parse(text, status);
}


const UChar *RelativeDateFormat::getStringForDay(int32_t day, int32_t &len, UErrorCode &status) const {
    if(U_FAILURE(status)) {
        return NULL;
    }
    
    // Is it outside the resource bundle's range?
    if(day < fDayMin || day > fDayMax) {
        return NULL; // don't have it.
    }
    
    // Linear search the held strings
    for(int n=0;n<fDatesLen;n++) {
        if(fDates[n].offset == day) {
            len = fDates[n].len;
            return fDates[n].string;
        }
    }
    
    return NULL;  // not found.
}

UnicodeString&
RelativeDateFormat::toPattern(UnicodeString& result, UErrorCode& status) const
{
    if (!U_FAILURE(status)) {
        result.remove();
        if (fTimeFormat == NULL || fCombinedFormat == 0) {
            if (fDateFormat != NULL) {
                UnicodeString datePattern;
                this->toPatternDate(datePattern, status);
                if (!U_FAILURE(status)) {
                    result.setTo(datePattern);
                }
            }
        } else {
            UnicodeString datePattern, timePattern;
            this->toPatternDate(datePattern, status);
            this->toPatternTime(timePattern, status);
            if (!U_FAILURE(status)) {
                Formattable timeDatePatterns[] = { timePattern, datePattern };
                FieldPosition pos;
                fCombinedFormat->format(timeDatePatterns, 2, result, pos, status);
            }
        }
    }
    return result;
}

UnicodeString&
RelativeDateFormat::toPatternDate(UnicodeString& result, UErrorCode& status) const
{
    if (!U_FAILURE(status)) {
        result.remove();
        if ( fDateFormat ) {
            SimpleDateFormat* sdtfmt = dynamic_cast<SimpleDateFormat*>(fDateFormat);
            if (sdtfmt != NULL) {
                sdtfmt->toPattern(result);
            } else {
                status = U_UNSUPPORTED_ERROR;
            }
        }
    }
    return result;
}

UnicodeString&
RelativeDateFormat::toPatternTime(UnicodeString& result, UErrorCode& status) const
{
    if (!U_FAILURE(status)) {
        result.remove();
        if ( fTimeFormat ) {
            SimpleDateFormat* sdtfmt = dynamic_cast<SimpleDateFormat*>(fTimeFormat);
            if (sdtfmt != NULL) {
                sdtfmt->toPattern(result);
            } else {
                status = U_UNSUPPORTED_ERROR;
            }
        }
    }
    return result;
}

void
RelativeDateFormat::applyPatterns(const UnicodeString& datePattern, const UnicodeString& timePattern, UErrorCode &status)
{
    if (!U_FAILURE(status)) {
        SimpleDateFormat* sdtfmt = NULL;
        SimpleDateFormat* stmfmt = NULL;
        if (fDateFormat && (sdtfmt = dynamic_cast<SimpleDateFormat*>(fDateFormat)) == NULL) {
            status = U_UNSUPPORTED_ERROR;
            return;
        }
        if (fTimeFormat && (stmfmt = dynamic_cast<SimpleDateFormat*>(fTimeFormat)) == NULL) {
            status = U_UNSUPPORTED_ERROR;
            return;
        }
        if ( fDateFormat ) {
            sdtfmt->applyPattern(datePattern);
        }
        if ( fTimeFormat ) {
            stmfmt->applyPattern(timePattern);
        }
    }
}

const DateFormatSymbols*
RelativeDateFormat::getDateFormatSymbols() const
{
    SimpleDateFormat* sdtfmt = NULL;
    if (fDateFormat && (sdtfmt = dynamic_cast<SimpleDateFormat*>(fDateFormat)) != NULL) {
        return sdtfmt->getDateFormatSymbols();
    }
    return NULL;
}

void RelativeDateFormat::loadDates(UErrorCode &status) {
    CalendarData calData(fLocale, "gregorian", status);
    
    UErrorCode tempStatus = status;
    UResourceBundle *dateTimePatterns = calData.getByKey(DT_DateTimePatternsTag, tempStatus);
    if(U_SUCCESS(tempStatus)) {
        int32_t patternsSize = ures_getSize(dateTimePatterns);
        if (patternsSize > kDateTime) {
            int32_t resStrLen = 0;

            int32_t glueIndex = kDateTime;
            if (patternsSize >= (DateFormat::kDateTimeOffset + DateFormat::kShort + 1)) {
                // Get proper date time format
                switch (fDateStyle) { 
                case kFullRelative: 
                case kFull: 
                    glueIndex = kDateTimeOffset + kFull; 
                    break; 
                case kLongRelative: 
                case kLong: 
                    glueIndex = kDateTimeOffset + kLong; 
                    break; 
                case kMediumRelative: 
                case kMedium: 
                    glueIndex = kDateTimeOffset + kMedium; 
                    break;         
                case kShortRelative: 
                case kShort: 
                    glueIndex = kDateTimeOffset + kShort; 
                    break; 
                default: 
                    break; 
                } 
            }

            const UChar *resStr = ures_getStringByIndex(dateTimePatterns, glueIndex, &resStrLen, &tempStatus);
            fCombinedFormat = new MessageFormat(UnicodeString(TRUE, resStr, resStrLen), fLocale, tempStatus);
        }
    }

    UResourceBundle *strings = calData.getByKey3("fields", "day", "relative", status);
    // set up min/max 
    fDayMin=-1;
    fDayMax=1;

    if(U_FAILURE(status)) {
        fDatesLen=0;
        return;
    }

    fDatesLen = ures_getSize(strings);
    fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);

    // Load in each item into the array...
    int n = 0;

    UResourceBundle *subString = NULL;
    
    while(ures_hasNext(strings) && U_SUCCESS(status)) {  // iterate over items
        subString = ures_getNextResource(strings, subString, &status);
        
        if(U_FAILURE(status) || (subString==NULL)) break;
        
        // key = offset #
        const char *key = ures_getKey(subString);
        
        // load the string and length
        int32_t aLen;
        const UChar* aString = ures_getString(subString, &aLen, &status);
        
        if(U_FAILURE(status) || aString == NULL) break;

        // calculate the offset
        int32_t offset = atoi(key);
        
        // set min/max
        if(offset < fDayMin) {
            fDayMin = offset;
        }
        if(offset > fDayMax) {
            fDayMax = offset;
        }
        
        // copy the string pointer
        fDates[n].offset = offset;
        fDates[n].string = aString;
        fDates[n].len = aLen; 

        n++;
    }
    ures_close(subString);
    
    // the fDates[] array could be sorted here, for direct access.
}


// this should to be in DateFormat, instead it was copied from SimpleDateFormat.

Calendar*
RelativeDateFormat::initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status)
{
    if(!U_FAILURE(status)) {
        fCalendar = Calendar::createInstance(adoptZone?adoptZone:TimeZone::createDefault(), locale, status);
    }
    if (U_SUCCESS(status) && fCalendar == NULL) {
        status = U_MEMORY_ALLOCATION_ERROR;
    }
    return fCalendar;
}

int32_t RelativeDateFormat::dayDifference(Calendar &cal, UErrorCode &status) {
    if(U_FAILURE(status)) {
        return 0;
    }
    // TODO: Cache the nowCal to avoid heap allocs? Would be difficult, don't know the calendar type
    Calendar *nowCal = cal.clone();
    nowCal->setTime(Calendar::getNow(), status);

    // For the day difference, we are interested in the difference in the (modified) julian day number
    // which is midnight to midnight.  Using fieldDifference() is NOT correct here, because 
    // 6pm Jan 4th  to 10am Jan 5th should be considered "tomorrow".
    int32_t dayDiff = cal.get(UCAL_JULIAN_DAY, status) - nowCal->get(UCAL_JULIAN_DAY, status);

    delete nowCal;
    return dayDiff;
}

U_NAMESPACE_END

#endif
Commit	Line	Data
46f4442e A	1	/*
46f4442e A	2	*******************************************************************************
4388f060	3	* Copyright (C) 2007-2011, International Business Machines Corporation and
729e4ab9	4	* others. All Rights Reserved.
46f4442e A	5	*******************************************************************************
	6	*/
	7
	8	#include "unicode/utypes.h"
	9
	10	#if !UCONFIG_NO_FORMATTING
	11
	12	//#define DEBUG_RELDTFMT
	13
	14	#include <stdio.h>
	15	#include <stdlib.h>
	16
	17	#include "reldtfmt.h"
	18	#include "unicode/msgfmt.h"
	19	#include "unicode/smpdtfmt.h"
	20
	21	#include "gregoimp.h" // for CalendarData
	22	#include "cmemory.h"
	23
	24	U_NAMESPACE_BEGIN
	25
	26
	27	/**
	28	* An array of URelativeString structs is used to store the resource data loaded out of the bundle.
	29	*/
	30	struct URelativeString {
	31	int32_t offset; / offset of this item, such as, the relative date /
	32	int32_t len; / length of the string /
	33	const UChar* string; / string, or NULL if not set /
	34	};
	35
	36	static const char DT_DateTimePatternsTag[]="DateTimePatterns";
	37
	38
	39	UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RelativeDateFormat)
	40
	41	RelativeDateFormat::RelativeDateFormat(const RelativeDateFormat& other) :
	42	DateFormat(other), fDateFormat(NULL), fTimeFormat(NULL), fCombinedFormat(NULL),
	43	fDateStyle(other.fDateStyle), fTimeStyle(other.fTimeStyle), fLocale(other.fLocale),
	44	fDayMin(other.fDayMin), fDayMax(other.fDayMax),
	45	fDatesLen(other.fDatesLen), fDates(NULL)
	46	{
	47	if(other.fDateFormat != NULL) {
	48	fDateFormat = (DateFormat*)other.fDateFormat->clone();
	49	} else {
	50	fDateFormat = NULL;
	51	}
	52	if (fDatesLen > 0) {
	53	fDates = (URelativeString) uprv_malloc(sizeof(fDates[0])fDatesLen);
	54	uprv_memcpy(fDates, other.fDates, sizeof(fDates[0])*fDatesLen);
	55	}
	56	//fCalendar = other.fCalendar->clone();
	57	/*
	58	if(other.fTimeFormat != NULL) {
	59	fTimeFormat = (DateFormat*)other.fTimeFormat->clone();
	60	} else {
	61	fTimeFormat = NULL;
	62	}
	63	*/
	64	}
	65
	66	RelativeDateFormat::RelativeDateFormat( UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const Locale& locale, UErrorCode& status)
	67	: DateFormat(), fDateFormat(NULL), fTimeFormat(NULL), fCombinedFormat(NULL),
	68	fDateStyle(dateStyle), fTimeStyle(timeStyle), fLocale(locale), fDatesLen(0), fDates(NULL)
69	{
70	if(U_FAILURE(status) ) {
71	return;
72	}
73
74	if(fDateStyle != UDAT_NONE) {
75	EStyle newStyle = (EStyle)(fDateStyle & ~UDAT_RELATIVE);
76	// Create a DateFormat in the non-relative style requested.
77	fDateFormat = createDateInstance(newStyle, locale);
78	}
79	if(fTimeStyle >= UDAT_FULL && fTimeStyle <= UDAT_SHORT) {
80	fTimeFormat = createTimeInstance((EStyle)fTimeStyle, locale);
81	} else if(fTimeStyle != UDAT_NONE) {
82	// don't support other time styles (e.g. relative styles), for now
83	status = U_ILLEGAL_ARGUMENT_ERROR;
84	return;
85	}
86
87	// Initialize the parent fCalendar, so that parse() works correctly.
88	initializeCalendar(NULL, locale, status);
89	loadDates(status);
90	}
91
92	RelativeDateFormat::~RelativeDateFormat() {
93	delete fDateFormat;
94	delete fTimeFormat;
95	delete fCombinedFormat;
96	uprv_free(fDates);
97	}
98
99
100	Format* RelativeDateFormat::clone(void) const {
101	return new RelativeDateFormat(*this);
102	}
103
104	UBool RelativeDateFormat::operator==(const Format& other) const {
105	if(DateFormat::operator==(other)) {
106	// DateFormat::operator== guarantees following cast is safe
107	RelativeDateFormat* that = (RelativeDateFormat*)&other;
108	return (fDateStyle==that->fDateStyle &&
109	fTimeStyle==that->fTimeStyle &&
110	fLocale==that->fLocale);
111	}
112	return FALSE;
113	}
114
115	UnicodeString& RelativeDateFormat::format( Calendar& cal,
116	UnicodeString& appendTo,
117	FieldPosition& pos) const {
118
119	UErrorCode status = U_ZERO_ERROR;
120	UChar emptyStr = 0;
121	UnicodeString dateString(&emptyStr);
122
123	// calculate the difference, in days, between 'cal' and now.
124	int dayDiff = dayDifference(cal, status);
125
126	// look up string
729e4ab9	127	int32_t len = 0;
46f4442e A	128	const UChar *theString = getStringForDay(dayDiff, len, status);
	129	if(U_SUCCESS(status) && (theString!=NULL)) {
	130	// found a relative string
	131	dateString.setTo(theString, len);
	132	}
	133
	134	if(fTimeFormat == NULL \|\| fCombinedFormat == 0) {
	135	if (dateString.length() > 0) {
	136	appendTo.append(dateString);
	137	} else if(fDateFormat != NULL) {
	138	fDateFormat->format(cal,appendTo,pos);
	139	}
	140	} else {
	141	if (dateString.length() == 0 && fDateFormat != NULL) {
	142	fDateFormat->format(cal,dateString,pos);
	143	}
	144	UnicodeString timeString(&emptyStr);
	145	FieldPosition timepos = pos;
	146	fTimeFormat->format(cal,timeString,timepos);
	147	Formattable timeDateStrings[] = { timeString, dateString };
	148	fCombinedFormat->format(timeDateStrings, 2, appendTo, pos, status); // pos is ignored by this
	149	int32_t offset;
	150	if (pos.getEndIndex() > 0 && (offset = appendTo.indexOf(dateString)) >= 0) {
	151	// pos.field was found in dateString, offset start & end based on final position of dateString
	152	pos.setBeginIndex( pos.getBeginIndex() + offset );
	153	pos.setEndIndex( pos.getEndIndex() + offset );
	154	} else if (timepos.getEndIndex() > 0 && (offset = appendTo.indexOf(timeString)) >= 0) {
	155	// pos.field was found in timeString, offset start & end based on final position of timeString
	156	pos.setBeginIndex( timepos.getBeginIndex() + offset );
	157	pos.setEndIndex( timepos.getEndIndex() + offset );
	158	}
	159	}
	160
	161	return appendTo;
	162	}
	163
	164
	165
	166	UnicodeString&
	167	RelativeDateFormat::format(const Formattable& obj,
	168	UnicodeString& appendTo,
	169	FieldPosition& pos,
	170	UErrorCode& status) const
	171	{
	172	// this is just here to get around the hiding problem
	173	// (the previous format() override would hide the version of
	174	// format() on DateFormat that this function correspond to, so we
	175	// have to redefine it here)
	176	return DateFormat::format(obj, appendTo, pos, status);
	177	}
	178
	179
	180	void RelativeDateFormat::parse( const UnicodeString& text,
	181	Calendar& cal,
	182	ParsePosition& pos) const {
	183
	184	// Can the fDateFormat parse it?
	185	if(fDateFormat != NULL) {
	186	ParsePosition aPos(pos);
	187	fDateFormat->parse(text,cal,aPos);
	188	if((aPos.getIndex() != pos.getIndex()) &&
	189	(aPos.getErrorIndex()==-1)) {
	190	pos=aPos; // copy the sub parse
	191	return; // parsed subfmt OK
192	}
193	}
194
195	// Linear search the relative strings
196	for(int n=0;n<fDatesLen;n++) {
197	if(fDates[n].string != NULL &&
198	(0==text.compare(pos.getIndex(),
199	fDates[n].len,
200	fDates[n].string))) {
201	UErrorCode status = U_ZERO_ERROR;
202
203	// Set the calendar to now+offset
204	cal.setTime(Calendar::getNow(),status);
205	cal.add(UCAL_DATE,fDates[n].offset, status);
206
207	if(U_FAILURE(status)) {
208	// failure in setting calendar fields
209	pos.setErrorIndex(pos.getIndex()+fDates[n].len);
210	} else {
211	pos.setIndex(pos.getIndex()+fDates[n].len);
212	}
213	return;
214	}
215	}
216
217	// parse failed
218	}
219
220	UDate
221	RelativeDateFormat::parse( const UnicodeString& text,
222	ParsePosition& pos) const {
223	// redefined here because the other parse() function hides this function's
224	// cunterpart on DateFormat
225	return DateFormat::parse(text, pos);
226	}
227
228	UDate
229	RelativeDateFormat::parse(const UnicodeString& text, UErrorCode& status) const
230	{
231	// redefined here because the other parse() function hides this function's
232	// counterpart on DateFormat
233	return DateFormat::parse(text, status);
234	}
235
236
237	const UChar *RelativeDateFormat::getStringForDay(int32_t day, int32_t &len, UErrorCode &status) const {
238	if(U_FAILURE(status)) {
239	return NULL;
240	}
241
242	// Is it outside the resource bundle's range?
243	if(day < fDayMin \|\| day > fDayMax) {
244	return NULL; // don't have it.
245	}
246
247	// Linear search the held strings
248	for(int n=0;n<fDatesLen;n++) {
249	if(fDates[n].offset == day) {
250	len = fDates[n].len;
251	return fDates[n].string;
252	}
253	}
254
255	return NULL; // not found.
256	}
257
258	UnicodeString&
259	RelativeDateFormat::toPattern(UnicodeString& result, UErrorCode& status) const
260	{
261	if (!U_FAILURE(status)) {
262	result.remove();
263	if (fTimeFormat == NULL \|\| fCombinedFormat == 0) {
264	if (fDateFormat != NULL) {
265	UnicodeString datePattern;
266	this->toPatternDate(datePattern, status);
267	if (!U_FAILURE(status)) {
268	result.setTo(datePattern);
269	}
270	}
271	} else {
272	UnicodeString datePattern, timePattern;
273	this->toPatternDate(datePattern, status);
274	this->toPatternTime(timePattern, status);
275	if (!U_FAILURE(status)) {
276	Formattable timeDatePatterns[] = { timePattern, datePattern };
277	FieldPosition pos;
278	fCombinedFormat->format(timeDatePatterns, 2, result, pos, status);
279	}
280	}
281	}
282	return result;
283	}
284
285	UnicodeString&
286	RelativeDateFormat::toPatternDate(UnicodeString& result, UErrorCode& status) const
287	{
288	if (!U_FAILURE(status)) {
289	result.remove();
290	if ( fDateFormat ) {
729e4ab9 A	291	SimpleDateFormat* sdtfmt = dynamic_cast<SimpleDateFormat*>(fDateFormat);
	292	if (sdtfmt != NULL) {
	293	sdtfmt->toPattern(result);
46f4442e A	294	} else {
	295	status = U_UNSUPPORTED_ERROR;
	296	}
	297	}
	298	}
	299	return result;
	300	}
	301
	302	UnicodeString&
	303	RelativeDateFormat::toPatternTime(UnicodeString& result, UErrorCode& status) const
	304	{
	305	if (!U_FAILURE(status)) {
	306	result.remove();
	307	if ( fTimeFormat ) {
729e4ab9 A	308	SimpleDateFormat* sdtfmt = dynamic_cast<SimpleDateFormat*>(fTimeFormat);
	309	if (sdtfmt != NULL) {
	310	sdtfmt->toPattern(result);
46f4442e A	311	} else {
	312	status = U_UNSUPPORTED_ERROR;
	313	}
	314	}
	315	}
	316	return result;
	317	}
	318
	319	void
	320	RelativeDateFormat::applyPatterns(const UnicodeString& datePattern, const UnicodeString& timePattern, UErrorCode &status)
	321	{
	322	if (!U_FAILURE(status)) {
729e4ab9 A	323	SimpleDateFormat* sdtfmt = NULL;
	324	SimpleDateFormat* stmfmt = NULL;
	325	if (fDateFormat && (sdtfmt = dynamic_cast<SimpleDateFormat*>(fDateFormat)) == NULL) {
46f4442e A	326	status = U_UNSUPPORTED_ERROR;
	327	return;
	328	}
729e4ab9	329	if (fTimeFormat && (stmfmt = dynamic_cast<SimpleDateFormat*>(fTimeFormat)) == NULL) {
46f4442e A	330	status = U_UNSUPPORTED_ERROR;
	331	return;
	332	}
	333	if ( fDateFormat ) {
729e4ab9	334	sdtfmt->applyPattern(datePattern);
46f4442e A	335	}
46f4442e A	336	if ( fTimeFormat ) {
729e4ab9	337	stmfmt->applyPattern(timePattern);
46f4442e A	338	}
	339	}
	340	}
	341
729e4ab9 A	342	const DateFormatSymbols*
	343	RelativeDateFormat::getDateFormatSymbols() const
	344	{
	345	SimpleDateFormat* sdtfmt = NULL;
	346	if (fDateFormat && (sdtfmt = dynamic_cast<SimpleDateFormat*>(fDateFormat)) != NULL) {
4388f060	347	return sdtfmt->getDateFormatSymbols();
729e4ab9 A	348	}
	349	return NULL;
	350	}
	351
46f4442e A	352	void RelativeDateFormat::loadDates(UErrorCode &status) {
	353	CalendarData calData(fLocale, "gregorian", status);
	354
	355	UErrorCode tempStatus = status;
	356	UResourceBundle *dateTimePatterns = calData.getByKey(DT_DateTimePatternsTag, tempStatus);
729e4ab9 A	357	if(U_SUCCESS(tempStatus)) {
	358	int32_t patternsSize = ures_getSize(dateTimePatterns);
	359	if (patternsSize > kDateTime) {
	360	int32_t resStrLen = 0;
	361
	362	int32_t glueIndex = kDateTime;
	363	if (patternsSize >= (DateFormat::kDateTimeOffset + DateFormat::kShort + 1)) {
	364	// Get proper date time format
	365	switch (fDateStyle) {
	366	case kFullRelative:
	367	case kFull:
	368	glueIndex = kDateTimeOffset + kFull;
	369	break;
	370	case kLongRelative:
	371	case kLong:
	372	glueIndex = kDateTimeOffset + kLong;
	373	break;
	374	case kMediumRelative:
	375	case kMedium:
	376	glueIndex = kDateTimeOffset + kMedium;
	377	break;
	378	case kShortRelative:
	379	case kShort:
	380	glueIndex = kDateTimeOffset + kShort;
	381	break;
	382	default:
	383	break;
	384	}
	385	}
	386
	387	const UChar *resStr = ures_getStringByIndex(dateTimePatterns, glueIndex, &resStrLen, &tempStatus);
	388	fCombinedFormat = new MessageFormat(UnicodeString(TRUE, resStr, resStrLen), fLocale, tempStatus);
	389	}
46f4442e A	390	}
	391
	392	UResourceBundle *strings = calData.getByKey3("fields", "day", "relative", status);
	393	// set up min/max
	394	fDayMin=-1;
	395	fDayMax=1;
	396
	397	if(U_FAILURE(status)) {
	398	fDatesLen=0;
	399	return;
	400	}
	401
	402	fDatesLen = ures_getSize(strings);
	403	fDates = (URelativeString) uprv_malloc(sizeof(fDates[0])fDatesLen);
	404
	405	// Load in each item into the array...
	406	int n = 0;
	407
	408	UResourceBundle *subString = NULL;
	409
	410	while(ures_hasNext(strings) && U_SUCCESS(status)) { // iterate over items
	411	subString = ures_getNextResource(strings, subString, &status);
	412
	413	if(U_FAILURE(status) \|\| (subString==NULL)) break;
	414
	415	// key = offset #
	416	const char *key = ures_getKey(subString);
	417
	418	// load the string and length
	419	int32_t aLen;
	420	const UChar* aString = ures_getString(subString, &aLen, &status);
	421
	422	if(U_FAILURE(status) \|\| aString == NULL) break;
	423
	424	// calculate the offset
	425	int32_t offset = atoi(key);
	426
	427	// set min/max
	428	if(offset < fDayMin) {
	429	fDayMin = offset;
	430	}
	431	if(offset > fDayMax) {
	432	fDayMax = offset;
	433	}
	434
	435	// copy the string pointer
	436	fDates[n].offset = offset;
	437	fDates[n].string = aString;
	438	fDates[n].len = aLen;
	439
	440	n++;
	441	}
	442	ures_close(subString);
	443
	444	// the fDates[] array could be sorted here, for direct access.
	445	}
	446
	447
	448	// this should to be in DateFormat, instead it was copied from SimpleDateFormat.
	449
	450	Calendar*
	451	RelativeDateFormat::initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status)
	452	{
	453	if(!U_FAILURE(status)) {
454	fCalendar = Calendar::createInstance(adoptZone?adoptZone:TimeZone::createDefault(), locale, status);
455	}
456	if (U_SUCCESS(status) && fCalendar == NULL) {
457	status = U_MEMORY_ALLOCATION_ERROR;
458	}
459	return fCalendar;
460	}
461
462	int32_t RelativeDateFormat::dayDifference(Calendar &cal, UErrorCode &status) {
463	if(U_FAILURE(status)) {
464	return 0;
465	}
466	// TODO: Cache the nowCal to avoid heap allocs? Would be difficult, don't know the calendar type
467	Calendar *nowCal = cal.clone();
468	nowCal->setTime(Calendar::getNow(), status);
469
470	// For the day difference, we are interested in the difference in the (modified) julian day number
471	// which is midnight to midnight. Using fieldDifference() is NOT correct here, because
472	// 6pm Jan 4th to 10am Jan 5th should be considered "tomorrow".
473	int32_t dayDiff = cal.get(UCAL_JULIAN_DAY, status) - nowCal->get(UCAL_JULIAN_DAY, status);
474
475	delete nowCal;
476	return dayDiff;
477	}
478
479	U_NAMESPACE_END
480
481	#endif
482