2910 lines
94 KiB
C++
2910 lines
94 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1997-2003, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*
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* File CALENDAR.CPP
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*
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* Modification History:
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*
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* Date Name Description
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* 02/03/97 clhuang Creation.
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* 04/22/97 aliu Cleaned up, fixed memory leak, made
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* setWeekCountData() more robust.
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* Moved platform code to TPlatformUtilities.
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* 05/01/97 aliu Made equals(), before(), after() arguments const.
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* 05/20/97 aliu Changed logic of when to compute fields and time
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* to fix bugs.
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* 08/12/97 aliu Added equivalentTo. Misc other fixes.
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* 07/28/98 stephen Sync up with JDK 1.2
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* 09/02/98 stephen Sync with JDK 1.2 8/31 build (getActualMin/Max)
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* 03/17/99 stephen Changed adoptTimeZone() - now fAreFieldsSet is
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* set to FALSE to force update of time.
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*******************************************************************************
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/resbund.h"
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#include "unicode/gregocal.h"
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#include "gregoimp.h"
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#include "buddhcal.h"
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#include "japancal.h"
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#include "unicode/calendar.h"
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#include "cpputils.h"
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#include "iculserv.h"
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#include "ucln_in.h"
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#include "cstring.h"
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U_NAMESPACE_BEGIN
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// ------------------------------------------
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//
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// Registration
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//
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//-------------------------------------------
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//#define U_DEBUG_CALSVC 1
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//
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#if defined( U_DEBUG_CALSVC ) || defined (U_DEBUG_CAL)
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#include <stdio.h>
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/**
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* convert a UCalendarDateFields into a string - for debugging
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* @param f field enum
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* @return static string to the field name
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* @internal
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*/
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static const char* fldName(UCalendarDateFields f) {
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switch (f) {
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#define FIELD_NAME_STR(x) case x: return (#x+5)
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FIELD_NAME_STR( UCAL_ERA );
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FIELD_NAME_STR( UCAL_YEAR );
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FIELD_NAME_STR( UCAL_MONTH );
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FIELD_NAME_STR( UCAL_WEEK_OF_YEAR );
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FIELD_NAME_STR( UCAL_WEEK_OF_MONTH );
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FIELD_NAME_STR( UCAL_DATE );
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FIELD_NAME_STR( UCAL_DAY_OF_YEAR );
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FIELD_NAME_STR( UCAL_DAY_OF_WEEK );
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FIELD_NAME_STR( UCAL_DAY_OF_WEEK_IN_MONTH );
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FIELD_NAME_STR( UCAL_AM_PM );
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FIELD_NAME_STR( UCAL_HOUR );
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FIELD_NAME_STR( UCAL_HOUR_OF_DAY );
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FIELD_NAME_STR( UCAL_MINUTE );
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FIELD_NAME_STR( UCAL_SECOND );
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FIELD_NAME_STR( UCAL_MILLISECOND );
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FIELD_NAME_STR( UCAL_ZONE_OFFSET );
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FIELD_NAME_STR( UCAL_DST_OFFSET );
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FIELD_NAME_STR( UCAL_YEAR_WOY );
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FIELD_NAME_STR( UCAL_DOW_LOCAL );
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FIELD_NAME_STR( UCAL_EXTENDED_YEAR );
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FIELD_NAME_STR( UCAL_JULIAN_DAY );
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FIELD_NAME_STR( UCAL_MILLISECONDS_IN_DAY );
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#undef FIELD_NAME_STR
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default:
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return "??";
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}
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}
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#endif
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static ICULocaleService* gService = NULL;
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// -------------------------------------
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/**
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* a Calendar Factory which creates the "basic" calendar types, that is, those
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* shipped with ICU.
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*/
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class BasicCalendarFactory : public LocaleKeyFactory {
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public:
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/**
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* @param calendarType static const string (caller owns storage - will be aliased) to calendar type
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*/
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BasicCalendarFactory(const char *calendarType)
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: LocaleKeyFactory(LocaleKeyFactory::INVISIBLE), fType(calendarType), fID(calendarType,"") { }
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virtual ~BasicCalendarFactory() {}
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protected:
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virtual UBool isSupportedID( const UnicodeString& id, UErrorCode& /* status */) const { return (id == fID); }
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virtual void updateVisibleIDs(Hashtable& result, UErrorCode& status) const
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{
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if (U_SUCCESS(status)) {
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const UnicodeString& id = fID;
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result.put(id, (void*)this, status);
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}
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}
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virtual UObject* create(const ICUServiceKey& key, const ICUService* /*service*/, UErrorCode& status) const {
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const LocaleKey& lkey = (LocaleKey&)key;
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Locale curLoc; // current locale
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Locale canLoc; // Canonical locale
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lkey.currentLocale(curLoc);
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lkey.canonicalLocale(canLoc);
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UnicodeString str;
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key.currentID(str);
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "BasicCalendarFactory[%s] - cur %s, can %s\n", fType, (const char*)curLoc.getName(), (const char*)canLoc.getName());
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#endif
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if(str != fID) { // Do we handle this type?
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "BasicCalendarFactory[%s] - not handling %s.\n", fType, (const char*) curLoc.getName() );
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#endif
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return NULL;
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}
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "BasicCalendarFactory %p: creating %s type for %s\n",
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this, fType, (const char*)curLoc.getName());
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fflush(stderr);
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#endif
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if(!fType || !*fType || !uprv_strcmp(fType,"gregorian")) { // Gregorian (default)
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return new GregorianCalendar(canLoc, status);
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} else if(!uprv_strcmp(fType, "japanese")) {
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return new JapaneseCalendar(canLoc, status);
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} else if(!uprv_strcmp(fType, "buddhist")) {
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return new BuddhistCalendar(canLoc, status);
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} else {
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status = U_UNSUPPORTED_ERROR;
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return NULL;
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}
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}
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private:
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const char *fType;
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const UnicodeString fID;
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};
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/**
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* A factory which looks up the DefaultCalendar resource to determine which class of calendar to use
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*/
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class DefaultCalendarFactory : public ICUResourceBundleFactory {
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public:
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DefaultCalendarFactory(): ICUResourceBundleFactory() { }
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protected:
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virtual UObject* create(const ICUServiceKey& key, const ICUService* /*service*/, UErrorCode& status) const {
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LocaleKey &lkey = (LocaleKey&)key;
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Locale loc;
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lkey.currentLocale(loc);
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "DefaultCalendar factory %p: looking up %s\n",
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this, (const char*)loc.getName());
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#endif
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UErrorCode resStatus = U_ZERO_ERROR;
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UResourceBundle *rb = ures_open(NULL, (const char*)loc.getName(), &resStatus);
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "... ures_open -> %s\n", u_errorName(resStatus));
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#endif
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if(U_FAILURE(resStatus) ||
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(resStatus == U_USING_DEFAULT_WARNING) || (resStatus==U_USING_FALLBACK_WARNING)) { //Don't want to handle fallback data.
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ures_close(rb);
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status = resStatus; // propagate err back to caller
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "... exitting (NULL)\n");
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#endif
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return NULL;
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}
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UnicodeString myString = ures_getUnicodeStringByKey(rb, Calendar::kDefaultCalendar, &status);
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#ifdef U_DEBUG_CALSVC
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int32_t len = 0;
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UErrorCode debugStatus = U_ZERO_ERROR;
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const UChar *defCal = ures_getStringByKey(rb, Calendar::kDefaultCalendar, &len, &debugStatus);
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fprintf(stderr, "... get string(%d) -> %s\n", len, u_errorName(debugStatus));
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#endif
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ures_close(rb);
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if(U_FAILURE(status)) {
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return NULL;
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}
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#ifdef U_DEBUG_CALSVC
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{
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char defCalStr[200];
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if(len > 199) {
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len = 199;
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}
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u_UCharsToChars(defCal, defCalStr, len);
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defCalStr[len]=0;
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fprintf(stderr, "DefaultCalendarFactory: looked up %s, got DefaultCalendar= %s\n", (const char*)loc.getName(), defCalStr);
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}
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#endif
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return myString.clone();
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}
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};
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// -------------------------------------
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class CalendarService : public ICULocaleService {
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public:
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CalendarService()
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: ICULocaleService("Calendar")
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{
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UErrorCode status = U_ZERO_ERROR;
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registerFactory(new DefaultCalendarFactory(), status);
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}
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virtual UObject* cloneInstance(UObject* instance) const {
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if(instance->getDynamicClassID() == UnicodeString::getStaticClassID()) {
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return ((UnicodeString*)instance)->clone();
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} else {
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#ifdef U_DEBUG_CALSVC_F
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UErrorCode status2 = U_ZERO_ERROR;
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fprintf(stderr, "Cloning a %s calendar with tz=%ld\n", ((Calendar*)instance)->getType(), ((Calendar*)instance)->get(UCAL_ZONE_OFFSET, status2));
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#endif
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return ((Calendar*)instance)->clone();
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}
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}
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virtual UObject* handleDefault(const ICUServiceKey& key, UnicodeString* /*actualID*/, UErrorCode& status) const {
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LocaleKey& lkey = (LocaleKey&)key;
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//int32_t kind = lkey.kind();
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Locale loc;
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lkey.canonicalLocale(loc);
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#ifdef U_DEBUG_CALSVC
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Locale loc2;
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lkey.currentLocale(loc2);
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fprintf(stderr, "CalSvc:handleDefault for currentLoc %s, canloc %s\n", (const char*)loc.getName(), (const char*)loc2.getName());
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#endif
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Calendar *nc = new GregorianCalendar(loc, status);
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#ifdef U_DEBUG_CALSVC
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UErrorCode status2 = U_ZERO_ERROR;
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fprintf(stderr, "New default calendar has tz=%d\n", ((Calendar*)nc)->get(UCAL_ZONE_OFFSET, status2));
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#endif
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return nc;
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}
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virtual UBool isDefault() const {
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return countFactories() == 1;
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}
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};
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// -------------------------------------
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static ICULocaleService*
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getService(void)
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{
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UBool needInit;
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{
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Mutex mutex;
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needInit = (UBool)(gService == NULL);
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}
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if (needInit) {
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UErrorCode status = U_ZERO_ERROR;
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "Spinning up Calendar Service\n");
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#endif
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ICULocaleService * newservice = new CalendarService();
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "Registering classes..\n");
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#endif
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// Register all basic instances.
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newservice->registerFactory(new BasicCalendarFactory("japanese"),status);
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newservice->registerFactory(new BasicCalendarFactory("buddhist"),status);
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newservice->registerFactory(new BasicCalendarFactory("gregorian"),status);
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "Done..\n");
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#endif
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if(U_FAILURE(status)) {
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#ifdef U_DEBUG_CALSVC
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fprintf(stderr, "err (%s) registering classes, deleting service.....\n", u_errorName(status));
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#endif
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delete newservice;
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newservice = NULL;
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}
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if (newservice) {
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Mutex mutex;
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if (gService == NULL) {
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gService = newservice;
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newservice = NULL;
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}
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}
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if (newservice) {
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delete newservice;
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} else {
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// we won the contention - we can register the cleanup.
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ucln_i18n_registerCleanup();
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}
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}
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return gService;
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}
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// -------------------------------------
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static const int32_t kCalendarLimits[UCAL_FIELD_COUNT][4] = {
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// Minimum Greatest min Least max Greatest max
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // ERA
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // YEAR
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // MONTH
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // WEEK_OF_YEAR
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // WEEK_OF_MONTH
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // DAY_OF_MONTH
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // DAY_OF_YEAR
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{ 1, 1, 7, 7 }, // DAY_OF_WEEK
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // DAY_OF_WEEK_IN_MONTH
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{ 0, 0, 1, 1 }, // AM_PM
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{ 0, 0, 11, 11 }, // HOUR
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{ 0, 0, 23, 23 }, // HOUR_OF_DAY
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{ 0, 0, 59, 59 }, // MINUTE
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{ 0, 0, 59, 59 }, // SECOND
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{ 0, 0, 999, 999 }, // MILLISECOND
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{-12*kOneHour, -12*kOneHour, 12*kOneHour, 12*kOneHour }, // ZONE_OFFSET
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{ 0, 0, 1*kOneHour, 1*kOneHour }, // DST_OFFSET
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // YEAR_WOY
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{ 1, 1, 7, 7 }, // DOW_LOCAL
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{/*N/A*/-1, /*N/A*/-1, /*N/A*/-1, /*N/A*/-1}, // EXTENDED_YEAR
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{ -0x7F000000, -0x7F000000, 0x7F000000, 0x7F000000 }, // JULIAN_DAY
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{ 0, 0, 24*kOneHour-1, 24*kOneHour-1 } // MILLISECONDS_IN_DAY
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};
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// Resource bundle tags read by this class
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const char Calendar::kDateTimeElements[] = "DateTimeElements";
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const char Calendar::kDefaultCalendar[] = "DefaultCalendar";
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// Data flow in Calendar
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// ---------------------
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// The current time is represented in two ways by Calendar: as UTC
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// milliseconds from the epoch start (1 January 1970 0:00 UTC), and as local
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// fields such as MONTH, HOUR, AM_PM, etc. It is possible to compute the
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// millis from the fields, and vice versa. The data needed to do this
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// conversion is encapsulated by a TimeZone object owned by the Calendar.
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// The data provided by the TimeZone object may also be overridden if the
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// user sets the ZONE_OFFSET and/or DST_OFFSET fields directly. The class
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// keeps track of what information was most recently set by the caller, and
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// uses that to compute any other information as needed.
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// If the user sets the fields using set(), the data flow is as follows.
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// This is implemented by the Calendar subclass's computeTime() method.
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// During this process, certain fields may be ignored. The disambiguation
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// algorithm for resolving which fields to pay attention to is described
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// above.
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// local fields (YEAR, MONTH, DATE, HOUR, MINUTE, etc.)
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// |
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// | Using Calendar-specific algorithm
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// V
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// local standard millis
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// |
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// | Using TimeZone or user-set ZONE_OFFSET / DST_OFFSET
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// V
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// UTC millis (in time data member)
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// If the user sets the UTC millis using setTime(), the data flow is as
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// follows. This is implemented by the Calendar subclass's computeFields()
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// method.
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// UTC millis (in time data member)
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// |
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// | Using TimeZone getOffset()
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// V
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// local standard millis
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// |
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// | Using Calendar-specific algorithm
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// V
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// local fields (YEAR, MONTH, DATE, HOUR, MINUTE, etc.)
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// In general, a round trip from fields, through local and UTC millis, and
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// back out to fields is made when necessary. This is implemented by the
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// complete() method. Resolving a partial set of fields into a UTC millis
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// value allows all remaining fields to be generated from that value. If
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// the Calendar is lenient, the fields are also renormalized to standard
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// ranges when they are regenerated.
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// -------------------------------------
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Calendar::Calendar(UErrorCode& success)
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: UObject(),
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fIsTimeSet(FALSE),
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fAreFieldsSet(FALSE),
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fAreAllFieldsSet(FALSE),
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fNextStamp(kMinimumUserStamp),
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fTime(0),
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fLenient(TRUE),
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fZone(0)
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{
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clear();
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fZone = TimeZone::createDefault();
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setWeekCountData(Locale::getDefault(), success);
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|
}
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// -------------------------------------
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Calendar::Calendar(TimeZone* zone, const Locale& aLocale, UErrorCode& success)
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: UObject(),
|
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fIsTimeSet(FALSE),
|
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fAreFieldsSet(FALSE),
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|
fAreAllFieldsSet(FALSE),
|
|
fNextStamp(kMinimumUserStamp),
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fTime(0),
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fLenient(TRUE),
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fZone(0)
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{
|
|
if(zone == 0) {
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because timezone cannot be 0\n",
|
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__FILE__, __LINE__);
|
|
#endif
|
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success = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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|
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clear();
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fZone = zone;
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|
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setWeekCountData(aLocale, success);
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}
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|
|
|
// -------------------------------------
|
|
|
|
Calendar::Calendar(const TimeZone& zone, const Locale& aLocale, UErrorCode& success)
|
|
: UObject(),
|
|
fIsTimeSet(FALSE),
|
|
fAreFieldsSet(FALSE),
|
|
fAreAllFieldsSet(FALSE),
|
|
fNextStamp(kMinimumUserStamp),
|
|
fTime(0),
|
|
fLenient(TRUE),
|
|
fZone(0)
|
|
{
|
|
clear();
|
|
fZone = zone.clone();
|
|
setWeekCountData(aLocale, success);
|
|
}
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|
|
|
// -------------------------------------
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|
|
|
Calendar::~Calendar()
|
|
{
|
|
delete fZone;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
Calendar::Calendar(const Calendar &source)
|
|
: UObject(source)
|
|
{
|
|
fZone = 0;
|
|
*this = source;
|
|
}
|
|
|
|
// -------------------------------------
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|
|
|
Calendar &
|
|
Calendar::operator=(const Calendar &right)
|
|
{
|
|
if (this != &right) {
|
|
uprv_arrayCopy(right.fFields, fFields, UCAL_FIELD_COUNT);
|
|
uprv_arrayCopy(right.fIsSet, fIsSet, UCAL_FIELD_COUNT);
|
|
uprv_arrayCopy(right.fStamp, fStamp, UCAL_FIELD_COUNT);
|
|
fTime = right.fTime;
|
|
fIsTimeSet = right.fIsTimeSet;
|
|
fAreAllFieldsSet = right.fAreAllFieldsSet;
|
|
fAreFieldsSet = right.fAreFieldsSet;
|
|
fLenient = right.fLenient;
|
|
delete fZone;
|
|
fZone = right.fZone->clone();
|
|
fFirstDayOfWeek = right.fFirstDayOfWeek;
|
|
fMinimalDaysInFirstWeek = right.fMinimalDaysInFirstWeek;
|
|
fNextStamp = right.fNextStamp;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
Calendar*
|
|
Calendar::createInstance(UErrorCode& success)
|
|
{
|
|
return createInstance(TimeZone::createDefault(), Locale::getDefault(), success);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
Calendar*
|
|
Calendar::createInstance(const TimeZone& zone, UErrorCode& success)
|
|
{
|
|
return createInstance(zone, Locale::getDefault(), success);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
Calendar*
|
|
Calendar::createInstance(const Locale& aLocale, UErrorCode& success)
|
|
{
|
|
return createInstance(TimeZone::createDefault(), aLocale, success);
|
|
}
|
|
|
|
// ------------------------------------- Adopting
|
|
|
|
// Note: this is the bottleneck that actually calls the service routines.
|
|
|
|
Calendar*
|
|
Calendar::createInstance(TimeZone* zone, const Locale& aLocale, UErrorCode& success)
|
|
{
|
|
UObject* u = getService()->get(aLocale, LocaleKey::KIND_ANY, success);
|
|
Calendar* c = NULL;
|
|
|
|
if(U_FAILURE(success) || !u) {
|
|
delete zone;
|
|
if(U_SUCCESS(success)) { // Propagate some kind of err
|
|
success = U_INTERNAL_PROGRAM_ERROR;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
if(u->getDynamicClassID() == UnicodeString::getStaticClassID()) {
|
|
// It's a unicode string telling us what type of calendar to load ("gregorian", etc)
|
|
char tmp[200];
|
|
const UnicodeString& str = *(UnicodeString*)u;
|
|
// Extract a char* out of it..
|
|
int32_t len = str.length();
|
|
int32_t actLen = sizeof(tmp)-1;
|
|
if(len > actLen) {
|
|
len = actLen;
|
|
}
|
|
str.extract(0,len,tmp);
|
|
tmp[len]=0;
|
|
|
|
#ifdef U_DEBUG_CALSVC
|
|
// fprintf(stderr, "createInstance(%s) told to look at %s..\n", (const char*)aLocale.getName(), tmp);
|
|
#endif
|
|
|
|
// Create a Locale over this string
|
|
Locale l(tmp);
|
|
|
|
delete u;
|
|
u = NULL;
|
|
|
|
c = (Calendar*)getService()->get(l, LocaleKey::KIND_ANY, success);
|
|
|
|
if(U_FAILURE(success) || !c) {
|
|
delete zone;
|
|
if(U_SUCCESS(success)) {
|
|
success = U_INTERNAL_PROGRAM_ERROR; // Propagate some err
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
if(c->getDynamicClassID() == UnicodeString::getStaticClassID()) {
|
|
// recursed! Second lookup returned a UnicodeString.
|
|
// Perhaps DefaultCalendar{} was set to another locale.
|
|
success = U_MISSING_RESOURCE_ERROR; // requested a calendar type which could NOT be found.
|
|
delete c;
|
|
delete zone;
|
|
return NULL;
|
|
}
|
|
#ifdef U_DEBUG_CALSVC
|
|
fprintf(stderr, "setting to locale %s\n", (const char*)aLocale.getName());
|
|
#endif
|
|
c->setWeekCountData(aLocale, success); // set the correct locale (this was an indirected calendar)
|
|
} else {
|
|
// a calendar was returned - we assume the factory did the right thing.
|
|
c = (Calendar*)u;
|
|
}
|
|
|
|
// Now, reset calendar to default state:
|
|
c->adoptTimeZone(zone); // Set the correct time zone
|
|
c->setTimeInMillis(getNow(), success); // let the new calendar have the current time.
|
|
return c;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
Calendar*
|
|
Calendar::createInstance(const TimeZone& zone, const Locale& aLocale, UErrorCode& success)
|
|
{
|
|
Calendar* c = createInstance(aLocale, success);
|
|
if(U_SUCCESS(success) && c) {
|
|
c->setTimeZone(zone);
|
|
}
|
|
return c;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UBool
|
|
Calendar::operator==(const Calendar& that) const
|
|
{
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
return isEquivalentTo(that) &&
|
|
getTimeInMillis(status) == that.getTimeInMillis(status) &&
|
|
U_SUCCESS(status);
|
|
}
|
|
|
|
UBool
|
|
Calendar::isEquivalentTo(const Calendar& other) const
|
|
{
|
|
return getDynamicClassID() == other.getDynamicClassID() &&
|
|
fLenient == other.fLenient &&
|
|
fFirstDayOfWeek == other.fFirstDayOfWeek &&
|
|
fMinimalDaysInFirstWeek == other.fMinimalDaysInFirstWeek &&
|
|
*fZone == *other.fZone;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UBool
|
|
Calendar::equals(const Calendar& when, UErrorCode& status) const
|
|
{
|
|
return (this == &when ||
|
|
getTime(status) == when.getTime(status));
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UBool
|
|
Calendar::before(const Calendar& when, UErrorCode& status) const
|
|
{
|
|
return (this != &when &&
|
|
getTimeInMillis(status) < when.getTimeInMillis(status));
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UBool
|
|
Calendar::after(const Calendar& when, UErrorCode& status) const
|
|
{
|
|
return (this != &when &&
|
|
getTimeInMillis(status) > when.getTimeInMillis(status));
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
|
|
const Locale*
|
|
Calendar::getAvailableLocales(int32_t& count)
|
|
{
|
|
return Locale::getAvailableLocales(count);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UDate
|
|
Calendar::getNow()
|
|
{
|
|
return (UDate)uprv_getUTCtime() * U_MILLIS_PER_SECOND; // return as milliseconds
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
/**
|
|
* Gets this Calendar's current time as a long.
|
|
* @return the current time as UTC milliseconds from the epoch.
|
|
*/
|
|
double
|
|
Calendar::getTimeInMillis(UErrorCode& status) const
|
|
{
|
|
if(U_FAILURE(status))
|
|
return 0.0;
|
|
|
|
if ( ! fIsTimeSet)
|
|
((Calendar*)this)->updateTime(status);
|
|
|
|
/* Test for buffer overflows */
|
|
if(U_FAILURE(status)) {
|
|
return 0.0;
|
|
}
|
|
return fTime;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
/**
|
|
* Sets this Calendar's current time from the given long value.
|
|
* @param date the new time in UTC milliseconds from the epoch.
|
|
*/
|
|
void
|
|
Calendar::setTimeInMillis( double millis, UErrorCode& status ) {
|
|
if(U_FAILURE(status))
|
|
return;
|
|
|
|
fIsTimeSet = TRUE;
|
|
fTime = millis;
|
|
|
|
fAreFieldsSet = FALSE;
|
|
|
|
computeFields(status);
|
|
|
|
/* Test for buffer overflows */
|
|
if(U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
fAreFieldsSet = TRUE;
|
|
fAreAllFieldsSet = TRUE;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
int32_t
|
|
Calendar::get(UCalendarDateFields field, UErrorCode& status) const
|
|
{
|
|
// field values are only computed when actually requested; for more on when computation
|
|
// of various things happens, see the "data flow in Calendar" description at the top
|
|
// of this file
|
|
if (U_SUCCESS(status)) ((Calendar*)this)->complete(status); // Cast away const
|
|
return U_SUCCESS(status) ? fFields[field] : 0;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::set(UCalendarDateFields field, int32_t value)
|
|
{
|
|
fIsTimeSet = FALSE;
|
|
fFields[field] = value;
|
|
fStamp[field] = fNextStamp++;
|
|
fAreFieldsSet = FALSE;
|
|
fIsSet[field] = TRUE; // Remove later
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::set(int32_t year, int32_t month, int32_t date)
|
|
{
|
|
set(UCAL_YEAR, year);
|
|
set(UCAL_MONTH, month);
|
|
set(UCAL_DATE, date);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::set(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute)
|
|
{
|
|
set(UCAL_YEAR, year);
|
|
set(UCAL_MONTH, month);
|
|
set(UCAL_DATE, date);
|
|
set(UCAL_HOUR_OF_DAY, hour);
|
|
set(UCAL_MINUTE, minute);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::set(int32_t year, int32_t month, int32_t date, int32_t hour, int32_t minute, int32_t second)
|
|
{
|
|
set(UCAL_YEAR, year);
|
|
set(UCAL_MONTH, month);
|
|
set(UCAL_DATE, date);
|
|
set(UCAL_HOUR_OF_DAY, hour);
|
|
set(UCAL_MINUTE, minute);
|
|
set(UCAL_SECOND, second);
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::clear()
|
|
{
|
|
for (int32_t i=0; i<UCAL_FIELD_COUNT; ++i) {
|
|
fFields[i] = 0; // Must do this; other code depends on it
|
|
fIsSet[i] = FALSE;
|
|
fStamp[i] = kUnset;
|
|
}
|
|
|
|
fAreFieldsSet = FALSE;
|
|
fAreAllFieldsSet = FALSE;
|
|
fIsTimeSet = FALSE;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::clear(UCalendarDateFields field)
|
|
{
|
|
fFields[field] = 0;
|
|
fStamp[field] = kUnset;
|
|
fAreFieldsSet = FALSE;
|
|
fAreAllFieldsSet = FALSE;
|
|
fIsSet[field] = FALSE; // Remove later
|
|
fIsTimeSet = FALSE;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UBool
|
|
Calendar::isSet(UCalendarDateFields field) const
|
|
{
|
|
return fStamp[field] != kUnset;
|
|
}
|
|
|
|
|
|
int32_t Calendar::newestStamp(UCalendarDateFields first, UCalendarDateFields last, int32_t bestStampSoFar) const
|
|
{
|
|
int32_t bestStamp = bestStampSoFar;
|
|
for (int32_t i=(int32_t)first; i<=(int32_t)last; ++i) {
|
|
if (fStamp[i] > bestStamp) {
|
|
bestStamp = fStamp[i];
|
|
}
|
|
}
|
|
return bestStamp;
|
|
}
|
|
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::complete(UErrorCode& status)
|
|
{
|
|
if (!fIsTimeSet) {
|
|
updateTime(status);
|
|
/* Test for buffer overflows */
|
|
if(U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
}
|
|
if (!fAreFieldsSet) {
|
|
computeFields(status); // fills in unset fields
|
|
/* Test for buffer overflows */
|
|
if(U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
fAreFieldsSet = TRUE;
|
|
fAreAllFieldsSet = TRUE;
|
|
}
|
|
}
|
|
|
|
//-------------------------------------------------------------------------
|
|
// Protected utility methods for use by subclasses. These are very handy
|
|
// for implementing add, roll, and computeFields.
|
|
//-------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Adjust the specified field so that it is within
|
|
* the allowable range for the date to which this calendar is set.
|
|
* For example, in a Gregorian calendar pinning the {@link #DAY_OF_MONTH DAY_OF_MONTH}
|
|
* field for a calendar set to April 31 would cause it to be set
|
|
* to April 30.
|
|
* <p>
|
|
* <b>Subclassing:</b>
|
|
* <br>
|
|
* This utility method is intended for use by subclasses that need to implement
|
|
* their own overrides of {@link #roll roll} and {@link #add add}.
|
|
* <p>
|
|
* <b>Note:</b>
|
|
* <code>pinField</code> is implemented in terms of
|
|
* {@link #getActualMinimum getActualMinimum}
|
|
* and {@link #getActualMaximum getActualMaximum}. If either of those methods uses
|
|
* a slow, iterative algorithm for a particular field, it would be
|
|
* unwise to attempt to call <code>pinField</code> for that field. If you
|
|
* really do need to do so, you should override this method to do
|
|
* something more efficient for that field.
|
|
* <p>
|
|
* @param field The calendar field whose value should be pinned.
|
|
*
|
|
* @see #getActualMinimum
|
|
* @see #getActualMaximum
|
|
* @stable ICU 2.0
|
|
*/
|
|
void Calendar::pinField(UCalendarDateFields field, UErrorCode& status) {
|
|
int32_t max = getActualMaximum(field, status);
|
|
int32_t min = getActualMinimum(field, status);
|
|
|
|
if (fFields[field] > max) {
|
|
set(field, max);
|
|
} else if (fFields[field] < min) {
|
|
set(field, min);
|
|
}
|
|
}
|
|
|
|
|
|
void Calendar::computeFields(UErrorCode &ec)
|
|
{
|
|
if (U_FAILURE(ec)) {
|
|
return;
|
|
}
|
|
// Compute local wall millis
|
|
double localMillis = internalGetTime();
|
|
int32_t rawOffset, dstOffset;
|
|
getTimeZone().getOffset(localMillis, FALSE, rawOffset, dstOffset, ec);
|
|
localMillis += rawOffset;
|
|
|
|
// Mark fields as set. Do this before calling handleComputeFields().
|
|
uint32_t mask = //fInternalSetMask;
|
|
(1 << ERA) |
|
|
(1 << UCAL_YEAR) |
|
|
(1 << UCAL_MONTH) |
|
|
(1 << UCAL_DAY_OF_MONTH) | // = UCAL_DATE
|
|
(1 << UCAL_DAY_OF_YEAR) |
|
|
(1 << UCAL_EXTENDED_YEAR);
|
|
|
|
for (int32_t i=0; i<UCAL_FIELD_COUNT; ++i) {
|
|
if ((mask & 1) == 0) {
|
|
fStamp[i] = kInternallySet;
|
|
fIsSet[i] = TRUE; // Remove later
|
|
} else {
|
|
fStamp[i] = kUnset;
|
|
fIsSet[i] = FALSE;
|
|
}
|
|
mask >>= 1;
|
|
}
|
|
|
|
// We used to check for and correct extreme millis values (near
|
|
// Long.MIN_VALUE or Long.MAX_VALUE) here. Such values would cause
|
|
// overflows from positive to negative (or vice versa) and had to
|
|
// be manually tweaked. We no longer need to do this because we
|
|
// have limited the range of supported dates to those that have a
|
|
// Julian day that fits into an int. This allows us to implement a
|
|
// JULIAN_DAY field and also removes some inelegant code. - Liu
|
|
// 11/6/00
|
|
|
|
int32_t days = (int32_t)Math::floorDivide(localMillis, kOneDay);
|
|
|
|
internalSet(UCAL_JULIAN_DAY,days + kEpochStartAsJulianDay);
|
|
|
|
#if defined (U_DEBUG_CAL)
|
|
//fprintf(stderr, "%s:%d- Hmm! Jules @ %d, as per %.0lf millis\n",
|
|
//__FILE__, __LINE__, fFields[UCAL_JULIAN_DAY], localMillis);
|
|
#endif
|
|
|
|
// In some cases we will have to call this method again below to
|
|
// adjust for DST pushing us into the next Julian day.
|
|
computeGregorianAndDOWFields(fFields[UCAL_JULIAN_DAY], ec);
|
|
|
|
int32_t millisInDay = (int32_t) (localMillis - (days * kOneDay));
|
|
if (millisInDay < 0) millisInDay += (int32_t)kOneDay;
|
|
|
|
// Adjust our millisInDay for DST. dstOffset will be zero if DST
|
|
// is not in effect at this time of year, or if our zone does not
|
|
// use DST.
|
|
millisInDay += dstOffset;
|
|
|
|
// If DST has pushed us into the next day, we must call
|
|
// computeGregorianAndDOWFields() again. This happens in DST between
|
|
// 12:00 am and 1:00 am every day. The first call to
|
|
// computeGregorianAndDOWFields() will give the wrong day, since the
|
|
// Standard time is in the previous day.
|
|
if (millisInDay >= (int32_t)kOneDay) {
|
|
millisInDay -= (int32_t)kOneDay; // ASSUME dstOffset < 24:00
|
|
|
|
// We don't worry about overflow of JULIAN_DAY because the
|
|
// allowable range of JULIAN_DAY has slop at the ends (that is,
|
|
// the max is less that 0x7FFFFFFF and the min is greater than
|
|
// -0x80000000).
|
|
computeGregorianAndDOWFields(++fFields[UCAL_JULIAN_DAY], ec);
|
|
}
|
|
|
|
// Call framework method to have subclass compute its fields.
|
|
// These must include, at a minimum, MONTH, DAY_OF_MONTH,
|
|
// EXTENDED_YEAR, YEAR, DAY_OF_YEAR. This method will call internalSet(),
|
|
// which will update stamp[].
|
|
handleComputeFields(fFields[UCAL_JULIAN_DAY], ec);
|
|
|
|
// Compute week-related fields, based on the subclass-computed
|
|
// fields computed by handleComputeFields().
|
|
computeWeekFields(ec);
|
|
|
|
// Compute time-related fields. These are indepent of the date and
|
|
// of the subclass algorithm. They depend only on the local zone
|
|
// wall milliseconds in day.
|
|
fFields[UCAL_MILLISECONDS_IN_DAY] = millisInDay;
|
|
fFields[UCAL_MILLISECOND] = millisInDay % 1000;
|
|
millisInDay /= 1000;
|
|
fFields[UCAL_SECOND] = millisInDay % 60;
|
|
millisInDay /= 60;
|
|
fFields[UCAL_MINUTE] = millisInDay % 60;
|
|
millisInDay /= 60;
|
|
fFields[UCAL_HOUR_OF_DAY] = millisInDay;
|
|
fFields[UCAL_AM_PM] = millisInDay / 12; // Assume AM == 0
|
|
fFields[UCAL_HOUR] = millisInDay % 12;
|
|
fFields[UCAL_ZONE_OFFSET] = rawOffset;
|
|
fFields[UCAL_DST_OFFSET] = dstOffset;
|
|
}
|
|
|
|
|
|
/**
|
|
* Compute the Gregorian calendar year, month, and day of month from
|
|
* the given Julian day. These values are not stored in fields, but in
|
|
* member variables gregorianXxx. Also compute the DAY_OF_WEEK and
|
|
* DOW_LOCAL fields.
|
|
*/
|
|
void Calendar::computeGregorianAndDOWFields(int32_t julianDay, UErrorCode &ec)
|
|
{
|
|
computeGregorianFields(julianDay, ec);
|
|
|
|
// Compute day of week: JD 0 = Monday
|
|
int32_t dow = julianDayToDayOfWeek(julianDay);
|
|
internalSet(UCAL_DAY_OF_WEEK,dow);
|
|
|
|
// Calculate 1-based localized day of week
|
|
int32_t dowLocal = dow - getFirstDayOfWeek() + 1;
|
|
if (dowLocal < 1) {
|
|
dowLocal += 7;
|
|
}
|
|
internalSet(UCAL_DOW_LOCAL,dowLocal);
|
|
fFields[UCAL_DOW_LOCAL] = dowLocal;
|
|
}
|
|
|
|
/**
|
|
* Compute the Gregorian calendar year, month, and day of month from the
|
|
* Julian day. These values are not stored in fields, but in member
|
|
* variables gregorianXxx. They are used for time zone computations and by
|
|
* subclasses that are Gregorian derivatives. Subclasses may call this
|
|
* method to perform a Gregorian calendar millis->fields computation.
|
|
* To perform a Gregorian calendar fields->millis computation, call
|
|
* computeGregorianMonthStart().
|
|
* @see #computeGregorianMonthStart
|
|
*/
|
|
void Calendar::computeGregorianFields(int32_t julianDay, UErrorCode & /* ec */) {
|
|
int32_t gregorianDayOfWeekUnused;
|
|
Grego::dayToFields(julianDay - kEpochStartAsJulianDay, fGregorianYear, fGregorianMonth, fGregorianDayOfMonth, gregorianDayOfWeekUnused, fGregorianDayOfYear);
|
|
}
|
|
|
|
/**
|
|
* Compute the fields WEEK_OF_YEAR, YEAR_WOY, WEEK_OF_MONTH,
|
|
* DAY_OF_WEEK_IN_MONTH, and DOW_LOCAL from EXTENDED_YEAR, YEAR,
|
|
* DAY_OF_WEEK, and DAY_OF_YEAR. The latter fields are computed by the
|
|
* subclass based on the calendar system.
|
|
*
|
|
* <p>The YEAR_WOY field is computed simplistically. It is equal to YEAR
|
|
* most of the time, but at the year boundary it may be adjusted to YEAR-1
|
|
* or YEAR+1 to reflect the overlap of a week into an adjacent year. In
|
|
* this case, a simple increment or decrement is performed on YEAR, even
|
|
* though this may yield an invalid YEAR value. For instance, if the YEAR
|
|
* is part of a calendar system with an N-year cycle field CYCLE, then
|
|
* incrementing the YEAR may involve incrementing CYCLE and setting YEAR
|
|
* back to 0 or 1. This is not handled by this code, and in fact cannot be
|
|
* simply handled without having subclasses define an entire parallel set of
|
|
* fields for fields larger than or equal to a year. This additional
|
|
* complexity is not warranted, since the intention of the YEAR_WOY field is
|
|
* to support ISO 8601 notation, so it will typically be used with a
|
|
* proleptic Gregorian calendar, which has no field larger than a year.
|
|
*/
|
|
void Calendar::computeWeekFields(UErrorCode &ec) {
|
|
if(U_FAILURE(ec)) {
|
|
return;
|
|
}
|
|
int32_t eyear = fFields[UCAL_EXTENDED_YEAR];
|
|
int32_t year = fFields[UCAL_YEAR];
|
|
int32_t dayOfWeek = fFields[UCAL_DAY_OF_WEEK];
|
|
int32_t dayOfYear = fFields[UCAL_DAY_OF_YEAR];
|
|
|
|
// WEEK_OF_YEAR start
|
|
// Compute the week of the year. For the Gregorian calendar, valid week
|
|
// numbers run from 1 to 52 or 53, depending on the year, the first day
|
|
// of the week, and the minimal days in the first week. For other
|
|
// calendars, the valid range may be different -- it depends on the year
|
|
// length. Days at the start of the year may fall into the last week of
|
|
// the previous year; days at the end of the year may fall into the
|
|
// first week of the next year. ASSUME that the year length is less than
|
|
// 7000 days.
|
|
int32_t yearOfWeekOfYear = year;
|
|
int32_t relDow = (dayOfWeek + 7 - getFirstDayOfWeek()) % 7; // 0..6
|
|
int32_t relDowJan1 = (dayOfWeek - dayOfYear + 7001 - getFirstDayOfWeek()) % 7; // 0..6
|
|
int32_t woy = (dayOfYear - 1 + relDowJan1) / 7; // 0..53
|
|
if ((7 - relDowJan1) >= getMinimalDaysInFirstWeek()) {
|
|
++woy;
|
|
}
|
|
|
|
// Adjust for weeks at the year end that overlap into the previous or
|
|
// next calendar year.
|
|
if (woy == 0) {
|
|
// We are the last week of the previous year.
|
|
// Check to see if we are in the last week; if so, we need
|
|
// to handle the case in which we are the first week of the
|
|
// next year.
|
|
|
|
int32_t prevDoy = dayOfYear + handleGetYearLength(eyear - 1);
|
|
woy = weekNumber(prevDoy, dayOfWeek);
|
|
yearOfWeekOfYear--;
|
|
} else {
|
|
int32_t lastDoy = handleGetYearLength(eyear);
|
|
// Fast check: For it to be week 1 of the next year, the DOY
|
|
// must be on or after L-5, where L is yearLength(), then it
|
|
// cannot possibly be week 1 of the next year:
|
|
// L-5 L
|
|
// doy: 359 360 361 362 363 364 365 001
|
|
// dow: 1 2 3 4 5 6 7
|
|
if (dayOfYear >= (lastDoy - 5)) {
|
|
int32_t lastRelDow = (relDow + lastDoy - dayOfYear) % 7;
|
|
if (lastRelDow < 0) {
|
|
lastRelDow += 7;
|
|
}
|
|
if (((6 - lastRelDow) >= getMinimalDaysInFirstWeek()) &&
|
|
((dayOfYear + 7 - relDow) > lastDoy)) {
|
|
woy = 1;
|
|
yearOfWeekOfYear++;
|
|
}
|
|
}
|
|
}
|
|
fFields[UCAL_WEEK_OF_YEAR] = woy;
|
|
fFields[UCAL_YEAR_WOY] = yearOfWeekOfYear;
|
|
// WEEK_OF_YEAR end
|
|
|
|
int32_t dayOfMonth = fFields[UCAL_DAY_OF_MONTH];
|
|
fFields[UCAL_WEEK_OF_MONTH] = weekNumber(dayOfMonth, dayOfWeek);
|
|
fFields[UCAL_DAY_OF_WEEK_IN_MONTH] = (dayOfMonth-1) / 7 + 1;
|
|
#if defined (U_DEBUG_CAL)
|
|
if(fFields[UCAL_DAY_OF_WEEK_IN_MONTH]==0) fprintf(stderr, "%s:%d: DOWIM %d on %g\n",
|
|
__FILE__, __LINE__,fFields[UCAL_DAY_OF_WEEK_IN_MONTH], fTime);
|
|
#endif
|
|
}
|
|
|
|
|
|
int32_t Calendar::weekNumber(int32_t desiredDay, int32_t dayOfPeriod, int32_t dayOfWeek)
|
|
{
|
|
// Determine the day of the week of the first day of the period
|
|
// in question (either a year or a month). Zero represents the
|
|
// first day of the week on this calendar.
|
|
int32_t periodStartDayOfWeek = (dayOfWeek - getFirstDayOfWeek() - dayOfPeriod + 1) % 7;
|
|
if (periodStartDayOfWeek < 0) periodStartDayOfWeek += 7;
|
|
|
|
// Compute the week number. Initially, ignore the first week, which
|
|
// may be fractional (or may not be). We add periodStartDayOfWeek in
|
|
// order to fill out the first week, if it is fractional.
|
|
int32_t weekNo = (desiredDay + periodStartDayOfWeek - 1)/7;
|
|
|
|
// If the first week is long enough, then count it. If
|
|
// the minimal days in the first week is one, or if the period start
|
|
// is zero, we always increment weekNo.
|
|
if ((7 - periodStartDayOfWeek) >= getMinimalDaysInFirstWeek()) ++weekNo;
|
|
|
|
return weekNo;
|
|
}
|
|
|
|
void Calendar::handleComputeFields(int32_t /* julianDay */, UErrorCode &/* status */)
|
|
{
|
|
internalSet(UCAL_MONTH, getGregorianMonth());
|
|
internalSet(UCAL_DAY_OF_MONTH, getGregorianDayOfMonth());
|
|
internalSet(UCAL_DAY_OF_YEAR, getGregorianDayOfYear());
|
|
int32_t eyear = getGregorianYear();
|
|
internalSet(UCAL_EXTENDED_YEAR, eyear);
|
|
int32_t era = GregorianCalendar::AD;
|
|
if (eyear < 1) {
|
|
era = GregorianCalendar::BC;
|
|
eyear = 1 - eyear;
|
|
}
|
|
internalSet(UCAL_ERA, era);
|
|
internalSet(UCAL_YEAR, eyear);
|
|
}
|
|
// -------------------------------------
|
|
void Calendar::roll(UCalendarDateFields field, int32_t amount, UErrorCode& status)
|
|
{
|
|
if (amount == 0) {
|
|
return; // Nothing to do
|
|
}
|
|
|
|
complete(status);
|
|
|
|
if(U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
switch (field) {
|
|
case UCAL_DAY_OF_MONTH:
|
|
case UCAL_AM_PM:
|
|
case UCAL_MINUTE:
|
|
case UCAL_SECOND:
|
|
case UCAL_MILLISECOND:
|
|
case UCAL_MILLISECONDS_IN_DAY:
|
|
case UCAL_ERA:
|
|
// These are the standard roll instructions. These work for all
|
|
// simple cases, that is, cases in which the limits are fixed, such
|
|
// as the hour, the day of the month, and the era.
|
|
{
|
|
int32_t min = getActualMinimum(field,status);
|
|
int32_t max = getActualMaximum(field,status);
|
|
int32_t gap = max - min + 1;
|
|
|
|
int32_t value = internalGet(field) + amount;
|
|
value = (value - min) % gap;
|
|
if (value < 0) {
|
|
value += gap;
|
|
}
|
|
value += min;
|
|
|
|
set(field, value);
|
|
return;
|
|
}
|
|
|
|
case UCAL_HOUR:
|
|
case UCAL_HOUR_OF_DAY:
|
|
// Rolling the hour is difficult on the ONSET and CEASE days of
|
|
// daylight savings. For example, if the change occurs at
|
|
// 2 AM, we have the following progression:
|
|
// ONSET: 12 Std -> 1 Std -> 3 Dst -> 4 Dst
|
|
// CEASE: 12 Dst -> 1 Dst -> 1 Std -> 2 Std
|
|
// To get around this problem we don't use fields; we manipulate
|
|
// the time in millis directly.
|
|
{
|
|
// Assume min == 0 in calculations below
|
|
double start = getTimeInMillis(status);
|
|
int32_t oldHour = internalGet(field);
|
|
int32_t max = getMaximum(field);
|
|
int32_t newHour = (oldHour + amount) % (max + 1);
|
|
if (newHour < 0) {
|
|
newHour += max + 1;
|
|
}
|
|
setTimeInMillis(start + kOneHour * (newHour - oldHour),status);
|
|
return;
|
|
}
|
|
|
|
case UCAL_MONTH:
|
|
// Rolling the month involves both pinning the final value
|
|
// and adjusting the DAY_OF_MONTH if necessary. We only adjust the
|
|
// DAY_OF_MONTH if, after updating the MONTH field, it is illegal.
|
|
// E.g., <jan31>.roll(MONTH, 1) -> <feb28> or <feb29>.
|
|
{
|
|
int32_t max = getActualMaximum(UCAL_MONTH, status);
|
|
int32_t mon = (internalGet(UCAL_MONTH) + amount) % (max+1);
|
|
|
|
if (mon < 0) {
|
|
mon += (max + 1);
|
|
}
|
|
set(UCAL_MONTH, mon);
|
|
|
|
// Keep the day of month in range. We don't want to spill over
|
|
// into the next month; e.g., we don't want jan31 + 1 mo -> feb31 ->
|
|
// mar3.
|
|
pinField(UCAL_DAY_OF_MONTH,status);
|
|
return;
|
|
}
|
|
|
|
case UCAL_YEAR:
|
|
case UCAL_YEAR_WOY:
|
|
case UCAL_EXTENDED_YEAR:
|
|
// Rolling the year can involve pinning the DAY_OF_MONTH.
|
|
set(field, internalGet(field) + amount);
|
|
pinField(UCAL_MONTH,status);
|
|
pinField(UCAL_DAY_OF_MONTH,status);
|
|
return;
|
|
|
|
case UCAL_WEEK_OF_MONTH:
|
|
{
|
|
// This is tricky, because during the roll we may have to shift
|
|
// to a different day of the week. For example:
|
|
|
|
// s m t w r f s
|
|
// 1 2 3 4 5
|
|
// 6 7 8 9 10 11 12
|
|
|
|
// When rolling from the 6th or 7th back one week, we go to the
|
|
// 1st (assuming that the first partial week counts). The same
|
|
// thing happens at the end of the month.
|
|
|
|
// The other tricky thing is that we have to figure out whether
|
|
// the first partial week actually counts or not, based on the
|
|
// minimal first days in the week. And we have to use the
|
|
// correct first day of the week to delineate the week
|
|
// boundaries.
|
|
|
|
// Here's our algorithm. First, we find the real boundaries of
|
|
// the month. Then we discard the first partial week if it
|
|
// doesn't count in this locale. Then we fill in the ends with
|
|
// phantom days, so that the first partial week and the last
|
|
// partial week are full weeks. We then have a nice square
|
|
// block of weeks. We do the usual rolling within this block,
|
|
// as is done elsewhere in this method. If we wind up on one of
|
|
// the phantom days that we added, we recognize this and pin to
|
|
// the first or the last day of the month. Easy, eh?
|
|
|
|
// Normalize the DAY_OF_WEEK so that 0 is the first day of the week
|
|
// in this locale. We have dow in 0..6.
|
|
int32_t dow = internalGet(UCAL_DAY_OF_WEEK) - getFirstDayOfWeek();
|
|
if (dow < 0) dow += 7;
|
|
|
|
// Find the day of the week (normalized for locale) for the first
|
|
// of the month.
|
|
int32_t fdm = (dow - internalGet(UCAL_DAY_OF_MONTH) + 1) % 7;
|
|
if (fdm < 0) fdm += 7;
|
|
|
|
// Get the first day of the first full week of the month,
|
|
// including phantom days, if any. Figure out if the first week
|
|
// counts or not; if it counts, then fill in phantom days. If
|
|
// not, advance to the first real full week (skip the partial week).
|
|
int32_t start;
|
|
if ((7 - fdm) < getMinimalDaysInFirstWeek())
|
|
start = 8 - fdm; // Skip the first partial week
|
|
else
|
|
start = 1 - fdm; // This may be zero or negative
|
|
|
|
// Get the day of the week (normalized for locale) for the last
|
|
// day of the month.
|
|
int32_t monthLen = getActualMaximum(UCAL_DAY_OF_MONTH, status);
|
|
int32_t ldm = (monthLen - internalGet(UCAL_DAY_OF_MONTH) + dow) % 7;
|
|
// We know monthLen >= DAY_OF_MONTH so we skip the += 7 step here.
|
|
|
|
// Get the limit day for the blocked-off rectangular month; that
|
|
// is, the day which is one past the last day of the month,
|
|
// after the month has already been filled in with phantom days
|
|
// to fill out the last week. This day has a normalized DOW of 0.
|
|
int32_t limit = monthLen + 7 - ldm;
|
|
|
|
// Now roll between start and (limit - 1).
|
|
int32_t gap = limit - start;
|
|
int32_t day_of_month = (internalGet(UCAL_DAY_OF_MONTH) + amount*7 -
|
|
start) % gap;
|
|
if (day_of_month < 0) day_of_month += gap;
|
|
day_of_month += start;
|
|
|
|
// Finally, pin to the real start and end of the month.
|
|
if (day_of_month < 1) day_of_month = 1;
|
|
if (day_of_month > monthLen) day_of_month = monthLen;
|
|
|
|
// Set the DAY_OF_MONTH. We rely on the fact that this field
|
|
// takes precedence over everything else (since all other fields
|
|
// are also set at this point). If this fact changes (if the
|
|
// disambiguation algorithm changes) then we will have to unset
|
|
// the appropriate fields here so that DAY_OF_MONTH is attended
|
|
// to.
|
|
set(UCAL_DAY_OF_MONTH, day_of_month);
|
|
return;
|
|
}
|
|
case UCAL_WEEK_OF_YEAR:
|
|
{
|
|
// This follows the outline of WEEK_OF_MONTH, except it applies
|
|
// to the whole year. Please see the comment for WEEK_OF_MONTH
|
|
// for general notes.
|
|
|
|
// Normalize the DAY_OF_WEEK so that 0 is the first day of the week
|
|
// in this locale. We have dow in 0..6.
|
|
int32_t dow = internalGet(UCAL_DAY_OF_WEEK) - getFirstDayOfWeek();
|
|
if (dow < 0) dow += 7;
|
|
|
|
// Find the day of the week (normalized for locale) for the first
|
|
// of the year.
|
|
int32_t fdy = (dow - internalGet(UCAL_DAY_OF_YEAR) + 1) % 7;
|
|
if (fdy < 0) fdy += 7;
|
|
|
|
// Get the first day of the first full week of the year,
|
|
// including phantom days, if any. Figure out if the first week
|
|
// counts or not; if it counts, then fill in phantom days. If
|
|
// not, advance to the first real full week (skip the partial week).
|
|
int32_t start;
|
|
if ((7 - fdy) < getMinimalDaysInFirstWeek())
|
|
start = 8 - fdy; // Skip the first partial week
|
|
else
|
|
start = 1 - fdy; // This may be zero or negative
|
|
|
|
// Get the day of the week (normalized for locale) for the last
|
|
// day of the year.
|
|
int32_t yearLen = getActualMaximum(UCAL_DAY_OF_YEAR,status);
|
|
int32_t ldy = (yearLen - internalGet(UCAL_DAY_OF_YEAR) + dow) % 7;
|
|
// We know yearLen >= DAY_OF_YEAR so we skip the += 7 step here.
|
|
|
|
// Get the limit day for the blocked-off rectangular year; that
|
|
// is, the day which is one past the last day of the year,
|
|
// after the year has already been filled in with phantom days
|
|
// to fill out the last week. This day has a normalized DOW of 0.
|
|
int32_t limit = yearLen + 7 - ldy;
|
|
|
|
// Now roll between start and (limit - 1).
|
|
int32_t gap = limit - start;
|
|
int32_t day_of_year = (internalGet(UCAL_DAY_OF_YEAR) + amount*7 -
|
|
start) % gap;
|
|
if (day_of_year < 0) day_of_year += gap;
|
|
day_of_year += start;
|
|
|
|
// Finally, pin to the real start and end of the month.
|
|
if (day_of_year < 1) day_of_year = 1;
|
|
if (day_of_year > yearLen) day_of_year = yearLen;
|
|
|
|
// Make sure that the year and day of year are attended to by
|
|
// clearing other fields which would normally take precedence.
|
|
// If the disambiguation algorithm is changed, this section will
|
|
// have to be updated as well.
|
|
set(UCAL_DAY_OF_YEAR, day_of_year);
|
|
clear(UCAL_MONTH);
|
|
return;
|
|
}
|
|
case UCAL_DAY_OF_YEAR:
|
|
{
|
|
// Roll the day of year using millis. Compute the millis for
|
|
// the start of the year, and get the length of the year.
|
|
double delta = amount * kOneDay; // Scale up from days to millis
|
|
double min2 = internalGet(UCAL_DAY_OF_YEAR)-1;
|
|
min2 *= kOneDay;
|
|
min2 = internalGetTime() - min2;
|
|
|
|
// double min2 = internalGetTime() - (internalGet(UCAL_DAY_OF_YEAR) - 1.0) * kOneDay;
|
|
double newtime;
|
|
|
|
double yearLength = getActualMaximum(UCAL_DAY_OF_YEAR,status);
|
|
double oneYear = yearLength;
|
|
oneYear *= kOneDay;
|
|
newtime = uprv_fmod((internalGetTime() + delta - min2), oneYear);
|
|
if (newtime < 0) newtime += oneYear;
|
|
setTimeInMillis(newtime + min2, status);
|
|
return;
|
|
}
|
|
case UCAL_DAY_OF_WEEK:
|
|
case UCAL_DOW_LOCAL:
|
|
{
|
|
// Roll the day of week using millis. Compute the millis for
|
|
// the start of the week, using the first day of week setting.
|
|
// Restrict the millis to [start, start+7days).
|
|
double delta = amount * kOneDay; // Scale up from days to millis
|
|
// Compute the number of days before the current day in this
|
|
// week. This will be a value 0..6.
|
|
int32_t leadDays = internalGet(field);
|
|
leadDays -= (field == UCAL_DAY_OF_WEEK) ? getFirstDayOfWeek() : 1;
|
|
if (leadDays < 0) leadDays += 7;
|
|
double min2 = internalGetTime() - leadDays * kOneDay;
|
|
double newtime = uprv_fmod((internalGetTime() + delta - min2), kOneWeek);
|
|
if (newtime < 0) newtime += kOneWeek;
|
|
setTimeInMillis(newtime + min2, status);
|
|
return;
|
|
}
|
|
case UCAL_DAY_OF_WEEK_IN_MONTH:
|
|
{
|
|
// Roll the day of week in the month using millis. Determine
|
|
// the first day of the week in the month, and then the last,
|
|
// and then roll within that range.
|
|
double delta = amount * kOneWeek; // Scale up from weeks to millis
|
|
// Find the number of same days of the week before this one
|
|
// in this month.
|
|
int32_t preWeeks = (internalGet(UCAL_DAY_OF_MONTH) - 1) / 7;
|
|
// Find the number of same days of the week after this one
|
|
// in this month.
|
|
int32_t postWeeks = (getActualMaximum(UCAL_DAY_OF_MONTH,status) -
|
|
internalGet(UCAL_DAY_OF_MONTH)) / 7;
|
|
// From these compute the min and gap millis for rolling.
|
|
double min2 = internalGetTime() - preWeeks * kOneWeek;
|
|
double gap2 = kOneWeek * (preWeeks + postWeeks + 1); // Must add 1!
|
|
// Roll within this range
|
|
double newtime = uprv_fmod((internalGetTime() + delta - min2), gap2);
|
|
if (newtime < 0) newtime += gap2;
|
|
setTimeInMillis(newtime + min2, status);
|
|
return;
|
|
}
|
|
case UCAL_JULIAN_DAY:
|
|
set(field, internalGet(field) + amount);
|
|
return;
|
|
default:
|
|
// Other fields cannot be rolled by this method
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because of roll on non-rollable field %s\n",
|
|
__FILE__, __LINE__,fldName(field));
|
|
#endif
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
}
|
|
|
|
void Calendar::add(EDateFields field, int32_t amount, UErrorCode& status)
|
|
{
|
|
Calendar::add((UCalendarDateFields)field, amount, status);
|
|
}
|
|
|
|
// -------------------------------------
|
|
void Calendar::add(UCalendarDateFields field, int32_t amount, UErrorCode& status)
|
|
{
|
|
if (amount == 0) {
|
|
return; // Do nothing!
|
|
}
|
|
|
|
// We handle most fields in the same way. The algorithm is to add
|
|
// a computed amount of millis to the current millis. The only
|
|
// wrinkle is with DST -- for some fields, like the DAY_OF_MONTH,
|
|
// we don't want the HOUR to shift due to changes in DST. If the
|
|
// result of the add operation is to move from DST to Standard, or
|
|
// vice versa, we need to adjust by an hour forward or back,
|
|
// respectively. For such fields we set keepHourInvariant to TRUE.
|
|
|
|
// We only adjust the DST for fields larger than an hour. For
|
|
// fields smaller than an hour, we cannot adjust for DST without
|
|
// causing problems. for instance, if you add one hour to April 5,
|
|
// 1998, 1:00 AM, in PST, the time becomes "2:00 AM PDT" (an
|
|
// illegal value), but then the adjustment sees the change and
|
|
// compensates by subtracting an hour. As a result the time
|
|
// doesn't advance at all.
|
|
|
|
// For some fields larger than a day, such as a UCAL_MONTH, we pin the
|
|
// UCAL_DAY_OF_MONTH. This allows <March 31>.add(UCAL_MONTH, 1) to be
|
|
// <April 30>, rather than <April 31> => <May 1>.
|
|
|
|
double delta = amount; // delta in ms
|
|
UBool keepHourInvariant = TRUE;
|
|
|
|
switch (field) {
|
|
case UCAL_ERA:
|
|
set(field, get(field, status) + amount);
|
|
pinField(UCAL_ERA, status);
|
|
return;
|
|
|
|
case UCAL_YEAR:
|
|
case UCAL_EXTENDED_YEAR:
|
|
case UCAL_YEAR_WOY:
|
|
case UCAL_MONTH:
|
|
set(field, get(field, status) + amount);
|
|
pinField(UCAL_DAY_OF_MONTH, status);
|
|
return;
|
|
|
|
case UCAL_WEEK_OF_YEAR:
|
|
case UCAL_WEEK_OF_MONTH:
|
|
case UCAL_DAY_OF_WEEK_IN_MONTH:
|
|
delta *= kOneWeek;
|
|
break;
|
|
|
|
case UCAL_AM_PM:
|
|
delta *= 12 * kOneHour;
|
|
break;
|
|
|
|
case UCAL_DAY_OF_MONTH:
|
|
case UCAL_DAY_OF_YEAR:
|
|
case UCAL_DAY_OF_WEEK:
|
|
case UCAL_DOW_LOCAL:
|
|
case UCAL_JULIAN_DAY:
|
|
delta *= kOneDay;
|
|
break;
|
|
|
|
case UCAL_HOUR_OF_DAY:
|
|
case UCAL_HOUR:
|
|
delta *= kOneHour;
|
|
keepHourInvariant = FALSE;
|
|
break;
|
|
|
|
case UCAL_MINUTE:
|
|
delta *= kOneMinute;
|
|
keepHourInvariant = FALSE;
|
|
break;
|
|
|
|
case UCAL_SECOND:
|
|
delta *= kOneSecond;
|
|
keepHourInvariant = FALSE;
|
|
break;
|
|
|
|
case UCAL_MILLISECOND:
|
|
case UCAL_MILLISECONDS_IN_DAY:
|
|
keepHourInvariant = FALSE;
|
|
break;
|
|
|
|
default:
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because field %s not addable",
|
|
__FILE__, __LINE__, fldName(field));
|
|
#endif
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
// throw new IllegalArgumentException("Calendar.add(" + fieldName(field) +
|
|
// ") not supported");
|
|
}
|
|
|
|
// In order to keep the hour invariant (for fields where this is
|
|
// appropriate), record the DST_OFFSET before and after the add()
|
|
// operation. If it has changed, then adjust the millis to
|
|
// compensate.
|
|
int32_t dst = 0;
|
|
int32_t hour = 0;
|
|
if (keepHourInvariant) {
|
|
dst = get(UCAL_DST_OFFSET, status);
|
|
hour = internalGet(UCAL_HOUR_OF_DAY);
|
|
}
|
|
|
|
setTimeInMillis(getTimeInMillis(status) + delta, status);
|
|
|
|
if (keepHourInvariant) {
|
|
dst -= get(UCAL_DST_OFFSET, status);
|
|
if (dst != 0) {
|
|
// We have done an hour-invariant adjustment but the
|
|
// DST offset has altered. We adjust millis to keep
|
|
// the hour constant. In cases such as midnight after
|
|
// a DST change which occurs at midnight, there is the
|
|
// danger of adjusting into a different day. To avoid
|
|
// this we make the adjustment only if it actually
|
|
// maintains the hour.
|
|
double t = internalGetTime();
|
|
setTimeInMillis(t + dst, status);
|
|
if (get(UCAL_HOUR_OF_DAY, status) != hour) {
|
|
setTimeInMillis(t, status);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// -------------------------------------
|
|
int32_t Calendar::fieldDifference(UDate when, EDateFields field, UErrorCode& status) {
|
|
return fieldDifference(when, (UCalendarDateFields) field, status);
|
|
}
|
|
|
|
int32_t Calendar::fieldDifference(UDate targetMs, UCalendarDateFields field, UErrorCode& ec) {
|
|
if (U_FAILURE(ec)) return 0;
|
|
int32_t min = 0;
|
|
double startMs = getTimeInMillis(ec);
|
|
// Always add from the start millis. This accomodates
|
|
// operations like adding years from February 29, 2000 up to
|
|
// February 29, 2004. If 1, 1, 1, 1 is added to the year
|
|
// field, the DOM gets pinned to 28 and stays there, giving an
|
|
// incorrect DOM difference of 1. We have to add 1, reset, 2,
|
|
// reset, 3, reset, 4.
|
|
if (startMs < targetMs) {
|
|
int32_t max = 1;
|
|
// Find a value that is too large
|
|
while (U_SUCCESS(ec)) {
|
|
setTimeInMillis(startMs, ec);
|
|
add(field, max, ec);
|
|
double ms = getTimeInMillis(ec);
|
|
if (ms == targetMs) {
|
|
return max;
|
|
} else if (ms > targetMs) {
|
|
break;
|
|
} else {
|
|
max <<= 1;
|
|
if (max < 0) {
|
|
// Field difference too large to fit into int32_t
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because field %s's max too large for int32_t\n",
|
|
__FILE__, __LINE__, fldName(field));
|
|
#endif
|
|
ec = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
}
|
|
}
|
|
// Do a binary search
|
|
while ((max - min) > 1 && U_SUCCESS(ec)) {
|
|
int32_t t = (min + max) / 2;
|
|
setTimeInMillis(startMs, ec);
|
|
add(field, t, ec);
|
|
double ms = getTimeInMillis(ec);
|
|
if (ms == targetMs) {
|
|
return t;
|
|
} else if (ms > targetMs) {
|
|
max = t;
|
|
} else {
|
|
min = t;
|
|
}
|
|
}
|
|
} else if (startMs > targetMs) {
|
|
int32_t max = -1;
|
|
// Find a value that is too small
|
|
while (U_SUCCESS(ec)) {
|
|
setTimeInMillis(startMs, ec);
|
|
add(field, max, ec);
|
|
double ms = getTimeInMillis(ec);
|
|
if (ms == targetMs) {
|
|
return max;
|
|
} else if (ms < targetMs) {
|
|
break;
|
|
} else {
|
|
max <<= 1;
|
|
if (max == 0) {
|
|
// Field difference too large to fit into int32_t
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because field %s's max too large for int32_t\n",
|
|
__FILE__, __LINE__, fldName(field));
|
|
#endif
|
|
ec = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
}
|
|
}
|
|
// Do a binary search
|
|
while ((min - max) > 1 && U_SUCCESS(ec)) {
|
|
int32_t t = (min + max) / 2;
|
|
setTimeInMillis(startMs, ec);
|
|
add(field, t, ec);
|
|
double ms = getTimeInMillis(ec);
|
|
if (ms == targetMs) {
|
|
return t;
|
|
} else if (ms < targetMs) {
|
|
max = t;
|
|
} else {
|
|
min = t;
|
|
}
|
|
}
|
|
}
|
|
// Set calendar to end point
|
|
setTimeInMillis(startMs, ec);
|
|
add(field, min, ec);
|
|
|
|
/* Test for buffer overflows */
|
|
if(U_FAILURE(ec)) {
|
|
return 0;
|
|
}
|
|
return min;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::adoptTimeZone(TimeZone* zone)
|
|
{
|
|
// Do nothing if passed-in zone is NULL
|
|
if (zone == NULL) return;
|
|
|
|
// fZone should always be non-null
|
|
if (fZone != NULL) delete fZone;
|
|
fZone = zone;
|
|
|
|
// if the zone changes, we need to recompute the time fields
|
|
fAreFieldsSet = FALSE;
|
|
}
|
|
|
|
// -------------------------------------
|
|
void
|
|
Calendar::setTimeZone(const TimeZone& zone)
|
|
{
|
|
adoptTimeZone(zone.clone());
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
const TimeZone&
|
|
Calendar::getTimeZone() const
|
|
{
|
|
return *fZone;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
TimeZone*
|
|
Calendar::orphanTimeZone()
|
|
{
|
|
TimeZone *z = fZone;
|
|
// we let go of the time zone; the new time zone is the system default time zone
|
|
fZone = TimeZone::createDefault();
|
|
return z;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::setLenient(UBool lenient)
|
|
{
|
|
fLenient = lenient;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
UBool
|
|
Calendar::isLenient() const
|
|
{
|
|
return fLenient;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::setFirstDayOfWeek(UCalendarDaysOfWeek value)
|
|
{
|
|
if (fFirstDayOfWeek != value &&
|
|
value >= UCAL_SUNDAY && value <= UCAL_SATURDAY) {
|
|
fFirstDayOfWeek = value;
|
|
fAreFieldsSet = FALSE;
|
|
}
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
Calendar::EDaysOfWeek
|
|
Calendar::getFirstDayOfWeek() const
|
|
{
|
|
return (Calendar::EDaysOfWeek)fFirstDayOfWeek;
|
|
}
|
|
|
|
UCalendarDaysOfWeek
|
|
Calendar::getFirstDayOfWeek(UErrorCode & /*status*/) const
|
|
{
|
|
return fFirstDayOfWeek;
|
|
}
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::setMinimalDaysInFirstWeek(uint8_t value)
|
|
{
|
|
// Values less than 1 have the same effect as 1; values greater
|
|
// than 7 have the same effect as 7. However, we normalize values
|
|
// so operator== and so forth work.
|
|
if (value < 1) {
|
|
value = 1;
|
|
} else if (value > 7) {
|
|
value = 7;
|
|
}
|
|
if (fMinimalDaysInFirstWeek != value) {
|
|
fMinimalDaysInFirstWeek = value;
|
|
fAreFieldsSet = FALSE;
|
|
}
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
uint8_t
|
|
Calendar::getMinimalDaysInFirstWeek() const
|
|
{
|
|
return fMinimalDaysInFirstWeek;
|
|
}
|
|
|
|
// ------------------------------------- limits
|
|
|
|
int32_t
|
|
Calendar::getMinimum(EDateFields field) const {
|
|
return getLimit((UCalendarDateFields) field,U_CAL_LIMIT_MINIMUM);
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getMinimum(UCalendarDateFields field) const
|
|
{
|
|
return getLimit(field,U_CAL_LIMIT_MINIMUM);
|
|
}
|
|
|
|
// -------------------------------------
|
|
int32_t
|
|
Calendar::getMaximum(EDateFields field) const
|
|
{
|
|
return getLimit((UCalendarDateFields) field,U_CAL_LIMIT_MAXIMUM);
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getMaximum(UCalendarDateFields field) const
|
|
{
|
|
return getLimit(field,U_CAL_LIMIT_MAXIMUM);
|
|
}
|
|
|
|
// -------------------------------------
|
|
int32_t
|
|
Calendar::getGreatestMinimum(EDateFields field) const
|
|
{
|
|
return getLimit((UCalendarDateFields)field,U_CAL_LIMIT_GREATEST_MINIMUM);
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getGreatestMinimum(UCalendarDateFields field) const
|
|
{
|
|
return getLimit(field,U_CAL_LIMIT_GREATEST_MINIMUM);
|
|
}
|
|
|
|
// -------------------------------------
|
|
int32_t
|
|
Calendar::getLeastMaximum(EDateFields field) const
|
|
{
|
|
return getLimit((UCalendarDateFields) field,U_CAL_LIMIT_LEAST_MAXIMUM);
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getLeastMaximum(UCalendarDateFields field) const
|
|
{
|
|
return getLimit( field,U_CAL_LIMIT_LEAST_MAXIMUM);
|
|
}
|
|
|
|
// -------------------------------------
|
|
int32_t
|
|
Calendar::getActualMinimum(EDateFields field, UErrorCode& status) const
|
|
{
|
|
return getActualMinimum((UCalendarDateFields) field, status);
|
|
}
|
|
|
|
int32_t Calendar::getLimit(UCalendarDateFields field, ELimitType limitType) const {
|
|
switch (field) {
|
|
case UCAL_DAY_OF_WEEK:
|
|
case UCAL_AM_PM:
|
|
case UCAL_HOUR:
|
|
case UCAL_HOUR_OF_DAY:
|
|
case UCAL_MINUTE:
|
|
case UCAL_SECOND:
|
|
case UCAL_MILLISECOND:
|
|
case UCAL_ZONE_OFFSET:
|
|
case UCAL_DST_OFFSET:
|
|
case UCAL_DOW_LOCAL:
|
|
case UCAL_JULIAN_DAY:
|
|
case UCAL_MILLISECONDS_IN_DAY:
|
|
return kCalendarLimits[field][limitType];
|
|
default:
|
|
return handleGetLimit(field, limitType);
|
|
}
|
|
}
|
|
|
|
|
|
int32_t
|
|
Calendar::getActualMinimum(UCalendarDateFields field, UErrorCode& status) const
|
|
{
|
|
int32_t fieldValue = getGreatestMinimum(field);
|
|
int32_t endValue = getMinimum(field);
|
|
|
|
// if we know that the minimum value is always the same, just return it
|
|
if (fieldValue == endValue) {
|
|
return fieldValue;
|
|
}
|
|
|
|
// clone the calendar so we don't mess with the real one, and set it to
|
|
// accept anything for the field values
|
|
Calendar *work = (Calendar*)this->clone();
|
|
work->setLenient(TRUE);
|
|
|
|
// now try each value from getLeastMaximum() to getMaximum() one by one until
|
|
// we get a value that normalizes to another value. The last value that
|
|
// normalizes to itself is the actual minimum for the current date
|
|
int32_t result = fieldValue;
|
|
|
|
do {
|
|
work->set(field, fieldValue);
|
|
if (work->get(field, status) != fieldValue) {
|
|
break;
|
|
}
|
|
else {
|
|
result = fieldValue;
|
|
fieldValue--;
|
|
}
|
|
} while (fieldValue >= endValue);
|
|
|
|
delete work;
|
|
|
|
/* Test for buffer overflows */
|
|
if(U_FAILURE(status)) {
|
|
return 0;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
|
|
|
|
/**
|
|
* Ensure that each field is within its valid range by calling {@link
|
|
* #validateField(int)} on each field that has been set. This method
|
|
* should only be called if this calendar is not lenient.
|
|
* @see #isLenient
|
|
* @see #validateField(int)
|
|
* @draft ICU 2.8
|
|
*/
|
|
void Calendar::validateFields(UErrorCode &status) {
|
|
for (int32_t field = 0; U_SUCCESS(status) && (field < UCAL_FIELD_COUNT); field++) {
|
|
if (isSet((UCalendarDateFields)field)) {
|
|
validateField((UCalendarDateFields)field, status);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Validate a single field of this calendar. Subclasses should
|
|
* override this method to validate any calendar-specific fields.
|
|
* Generic fields can be handled by
|
|
* <code>Calendar.validateField()</code>.
|
|
* @see #validateField(int, int, int)
|
|
* @draft ICU 2.8
|
|
*/
|
|
void Calendar::validateField(UCalendarDateFields field, UErrorCode &status) {
|
|
int32_t y;
|
|
switch (field) {
|
|
case UCAL_DAY_OF_MONTH:
|
|
y = handleGetExtendedYear();
|
|
validateField(field, 1, handleGetMonthLength(y, internalGet(UCAL_MONTH)), status);
|
|
break;
|
|
case UCAL_DAY_OF_YEAR:
|
|
y = handleGetExtendedYear();
|
|
validateField(field, 1, handleGetYearLength(y), status);
|
|
break;
|
|
case UCAL_DAY_OF_WEEK_IN_MONTH:
|
|
if (internalGet(field) == 0) {
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because DOW in month cannot be 0\n",
|
|
__FILE__, __LINE__);
|
|
#endif
|
|
status = U_ILLEGAL_ARGUMENT_ERROR; // "DAY_OF_WEEK_IN_MONTH cannot be zero"
|
|
return;
|
|
}
|
|
validateField(field, getMinimum(field), getMaximum(field), status);
|
|
break;
|
|
default:
|
|
validateField(field, getMinimum(field), getMaximum(field), status);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Validate a single field of this calendar given its minimum and
|
|
* maximum allowed value. If the field is out of range, throw a
|
|
* descriptive <code>IllegalArgumentException</code>. Subclasses may
|
|
* use this method in their implementation of {@link
|
|
* #validateField(int)}.
|
|
* @draft ICU 2.8
|
|
*/
|
|
void Calendar::validateField(UCalendarDateFields field, int32_t min, int32_t max, UErrorCode& status)
|
|
{
|
|
int32_t value = fFields[field];
|
|
if (value < min || value > max) {
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d: ILLEGAL ARG because of field %s out of range %d..%d at %d\n",
|
|
__FILE__, __LINE__,fldName(field),min,max,value);
|
|
#endif
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// -------------------------
|
|
|
|
const UFieldResolutionTable* Calendar::getFieldResolutionTable() const {
|
|
return kDatePrecedence;
|
|
}
|
|
|
|
|
|
UCalendarDateFields Calendar::newerField(UCalendarDateFields defaultField, UCalendarDateFields alternateField) const
|
|
{
|
|
if (fStamp[alternateField] > fStamp[defaultField]) {
|
|
return alternateField;
|
|
}
|
|
return defaultField;
|
|
}
|
|
|
|
UCalendarDateFields Calendar::resolveFields(const UFieldResolutionTable* precedenceTable) {
|
|
int32_t bestField = -1;
|
|
for (int32_t g=0; precedenceTable[g][0][0] != -1 && bestField < 0; ++g) {
|
|
int32_t bestStamp = kUnset;
|
|
for (int32_t l=0; precedenceTable[g][l][0] != -1; ++l) {
|
|
int32_t lineStamp = kUnset;
|
|
// Skip over first entry if it is negative
|
|
for (int32_t i=((precedenceTable[g][l][0]>=kResolveRemap)?1:0); precedenceTable[g][l][i]!=-1; ++i) {
|
|
int32_t s = fStamp[precedenceTable[g][l][i]];
|
|
// If any field is unset then don't use this line
|
|
if (s == kUnset) {
|
|
goto linesInGroup;
|
|
} else if(s > lineStamp) {
|
|
lineStamp = s;
|
|
}
|
|
}
|
|
// Record new maximum stamp & field no.
|
|
if (lineStamp > bestStamp) {
|
|
bestStamp = lineStamp;
|
|
bestField = precedenceTable[g][l][0]; // First field refers to entire line
|
|
}
|
|
linesInGroup:
|
|
;
|
|
}
|
|
}
|
|
return (UCalendarDateFields)( (bestField>=kResolveRemap)?(bestField&(kResolveRemap-1)):bestField );
|
|
}
|
|
|
|
const int32_t Calendar::kResolveRemap = 32;
|
|
|
|
const UFieldResolutionTable Calendar::kDatePrecedence[] =
|
|
{
|
|
{
|
|
{ UCAL_DAY_OF_MONTH, -1 },
|
|
{ UCAL_WEEK_OF_YEAR, UCAL_DAY_OF_WEEK, -1 },
|
|
{ UCAL_WEEK_OF_MONTH, UCAL_DAY_OF_WEEK, -1 },
|
|
{ UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, -1 },
|
|
{ UCAL_WEEK_OF_YEAR, UCAL_DOW_LOCAL, -1 },
|
|
{ UCAL_WEEK_OF_MONTH, UCAL_DOW_LOCAL, -1 },
|
|
{ UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, -1 },
|
|
{ UCAL_DAY_OF_YEAR, -1 },
|
|
{ kResolveRemap | UCAL_DAY_OF_MONTH, UCAL_YEAR, -1 }, // if YEAR is set over YEAR_WOY use DAY_OF_MONTH
|
|
{ kResolveRemap | UCAL_WEEK_OF_YEAR, UCAL_YEAR_WOY, -1 }, // if YEAR_WOY is set, calc based on WEEK_OF_YEAR
|
|
{ -1 }
|
|
},
|
|
{
|
|
{ UCAL_WEEK_OF_YEAR, -1 },
|
|
{ UCAL_WEEK_OF_MONTH, -1 },
|
|
{ UCAL_DAY_OF_WEEK_IN_MONTH, -1 },
|
|
{ kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, -1 },
|
|
{ kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, -1 },
|
|
{ -1 }
|
|
},
|
|
{{-1}}
|
|
};
|
|
|
|
|
|
const UFieldResolutionTable Calendar::kDOWPrecedence[] =
|
|
{
|
|
{
|
|
{ UCAL_DAY_OF_WEEK,-1, -1 },
|
|
{ UCAL_DOW_LOCAL,-1, -1 },
|
|
{-1}
|
|
},
|
|
{{-1}}
|
|
};
|
|
|
|
// precedence for calculating a year
|
|
const UFieldResolutionTable Calendar::kYearPrecedence[] =
|
|
{
|
|
{
|
|
{ UCAL_YEAR, -1 },
|
|
{ UCAL_EXTENDED_YEAR, -1 },
|
|
{ UCAL_YEAR_WOY, UCAL_WEEK_OF_YEAR, -1 }, // YEAR_WOY is useless without WEEK_OF_YEAR
|
|
{ -1 }
|
|
},
|
|
{{-1}}
|
|
};
|
|
|
|
|
|
// -------------------------
|
|
|
|
|
|
void Calendar::computeTime(UErrorCode& status) {
|
|
if (!isLenient()) {
|
|
validateFields(status);
|
|
}
|
|
|
|
// Compute the Julian day
|
|
int32_t julianDay = computeJulianDay();
|
|
|
|
double millis = Grego::julianDayToMillis(julianDay);
|
|
|
|
#if defined (U_DEBUG_CAL)
|
|
// int32_t julianInsanityCheck = (int32_t)Math::floorDivide(millis, kOneDay);
|
|
// julianInsanityCheck += kEpochStartAsJulianDay;
|
|
// if(1 || julianInsanityCheck != julianDay) {
|
|
// fprintf(stderr, "%s:%d- D'oh- computed jules %d, to mills (%s)%.lf, recomputed %d\n",
|
|
// __FILE__, __LINE__, julianDay, millis<0.0?"NEG":"", millis, julianInsanityCheck);
|
|
// }
|
|
#endif
|
|
|
|
int32_t millisInDay;
|
|
|
|
// We only use MILLISECONDS_IN_DAY if it has been set by the user.
|
|
// This makes it possible for the caller to set the calendar to a
|
|
// time and call clear(MONTH) to reset the MONTH to January. This
|
|
// is legacy behavior. Without this, clear(MONTH) has no effect,
|
|
// since the internally set JULIAN_DAY is used.
|
|
if (fStamp[UCAL_MILLISECONDS_IN_DAY] >= kMinimumUserStamp &&
|
|
newestStamp(UCAL_AM_PM, UCAL_MILLISECOND, kUnset) <= fStamp[UCAL_MILLISECONDS_IN_DAY]) {
|
|
millisInDay = internalGet(UCAL_MILLISECONDS_IN_DAY);
|
|
} else {
|
|
millisInDay = computeMillisInDay();
|
|
}
|
|
|
|
// Compute the time zone offset and DST offset. There are two potential
|
|
// ambiguities here. We'll assume a 2:00 am (wall time) switchover time
|
|
// for discussion purposes here.
|
|
// 1. The transition into DST. Here, a designated time of 2:00 am - 2:59 am
|
|
// can be in standard or in DST depending. However, 2:00 am is an invalid
|
|
// representation (the representation jumps from 1:59:59 am Std to 3:00:00 am DST).
|
|
// We assume standard time.
|
|
// 2. The transition out of DST. Here, a designated time of 1:00 am - 1:59 am
|
|
// can be in standard or DST. Both are valid representations (the rep
|
|
// jumps from 1:59:59 DST to 1:00:00 Std).
|
|
// Again, we assume standard time.
|
|
// We use the TimeZone object, unless the user has explicitly set the ZONE_OFFSET
|
|
// or DST_OFFSET fields; then we use those fields.
|
|
if (fStamp[UCAL_ZONE_OFFSET] >= kMinimumUserStamp ||
|
|
fStamp[UCAL_DST_OFFSET] >= kMinimumUserStamp) {
|
|
millisInDay -= internalGet(UCAL_ZONE_OFFSET) + internalGet(UCAL_DST_OFFSET);
|
|
} else {
|
|
millisInDay -= computeZoneOffset(millis, millisInDay,status);
|
|
}
|
|
|
|
internalSetTime(millis + millisInDay);
|
|
}
|
|
|
|
/**
|
|
* Compute the milliseconds in the day from the fields. This is a
|
|
* value from 0 to 23:59:59.999 inclusive, unless fields are out of
|
|
* range, in which case it can be an arbitrary value. This value
|
|
* reflects local zone wall time.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t Calendar::computeMillisInDay() {
|
|
// Do the time portion of the conversion.
|
|
|
|
int32_t millisInDay = 0;
|
|
|
|
// Find the best set of fields specifying the time of day. There
|
|
// are only two possibilities here; the HOUR_OF_DAY or the
|
|
// AM_PM and the HOUR.
|
|
int32_t hourOfDayStamp = fStamp[UCAL_HOUR_OF_DAY];
|
|
int32_t hourStamp = (fStamp[UCAL_HOUR] > fStamp[UCAL_AM_PM])?fStamp[UCAL_HOUR]:fStamp[UCAL_AM_PM];
|
|
int32_t bestStamp = (hourStamp > hourOfDayStamp) ? hourStamp : hourOfDayStamp;
|
|
|
|
// Hours
|
|
if (bestStamp != kUnset) {
|
|
if (bestStamp == hourOfDayStamp) {
|
|
// Don't normalize here; let overflow bump into the next period.
|
|
// This is consistent with how we handle other fields.
|
|
millisInDay += internalGet(UCAL_HOUR_OF_DAY);
|
|
} else {
|
|
// Don't normalize here; let overflow bump into the next period.
|
|
// This is consistent with how we handle other fields.
|
|
millisInDay += internalGet(UCAL_HOUR);
|
|
millisInDay += 12 * internalGet(UCAL_AM_PM); // Default works for unset AM_PM
|
|
}
|
|
}
|
|
|
|
// We use the fact that unset == 0; we start with millisInDay
|
|
// == HOUR_OF_DAY.
|
|
millisInDay *= 60;
|
|
millisInDay += internalGet(UCAL_MINUTE); // now have minutes
|
|
millisInDay *= 60;
|
|
millisInDay += internalGet(UCAL_SECOND); // now have seconds
|
|
millisInDay *= 1000;
|
|
millisInDay += internalGet(MILLISECOND); // now have millis
|
|
|
|
return millisInDay;
|
|
}
|
|
|
|
/**
|
|
* This method can assume EXTENDED_YEAR has been set.
|
|
* @param millis milliseconds of the date fields
|
|
* @param millisInDay milliseconds of the time fields; may be out
|
|
* or range.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t Calendar::computeZoneOffset(double millis, int32_t millisInDay, UErrorCode &ec) {
|
|
int32_t rawOffset, dstOffset;
|
|
getTimeZone().getOffset(millis+millisInDay, TRUE, rawOffset, dstOffset, ec);
|
|
return rawOffset + dstOffset;
|
|
// Note: Because we pass in wall millisInDay, rather than
|
|
// standard millisInDay, we interpret "1:00 am" on the day
|
|
// of cessation of DST as "1:00 am Std" (assuming the time
|
|
// of cessation is 2:00 am).
|
|
}
|
|
|
|
int32_t Calendar::computeJulianDay()
|
|
{
|
|
// We want to see if any of the date fields is newer than the
|
|
// JULIAN_DAY. If not, then we use JULIAN_DAY. If so, then we do
|
|
// the normal resolution. We only use JULIAN_DAY if it has been
|
|
// set by the user. This makes it possible for the caller to set
|
|
// the calendar to a time and call clear(MONTH) to reset the MONTH
|
|
// to January. This is legacy behavior. Without this,
|
|
// clear(MONTH) has no effect, since the internally set JULIAN_DAY
|
|
// is used.
|
|
if (fStamp[UCAL_JULIAN_DAY] >= kMinimumUserStamp) {
|
|
int32_t bestStamp = newestStamp(UCAL_ERA, UCAL_DAY_OF_WEEK_IN_MONTH, kUnset);
|
|
bestStamp = newestStamp(UCAL_YEAR_WOY, UCAL_EXTENDED_YEAR, bestStamp);
|
|
if (bestStamp <= fStamp[UCAL_JULIAN_DAY]) {
|
|
return internalGet(UCAL_JULIAN_DAY);
|
|
}
|
|
}
|
|
|
|
UCalendarDateFields bestField = resolveFields(getFieldResolutionTable());
|
|
if (bestField < 0) {
|
|
bestField = UCAL_DAY_OF_MONTH;
|
|
}
|
|
|
|
return handleComputeJulianDay(bestField);
|
|
}
|
|
|
|
// -------------------------------------------
|
|
|
|
int32_t Calendar::handleComputeJulianDay(UCalendarDateFields bestField) {
|
|
UBool useMonth = (bestField == UCAL_DAY_OF_MONTH ||
|
|
bestField == UCAL_WEEK_OF_MONTH ||
|
|
bestField == UCAL_DAY_OF_WEEK_IN_MONTH);
|
|
int32_t year;
|
|
|
|
if (bestField == UCAL_WEEK_OF_YEAR) {
|
|
year = internalGet(UCAL_YEAR_WOY, handleGetExtendedYear());
|
|
internalSet(UCAL_EXTENDED_YEAR, year);
|
|
} else {
|
|
year = handleGetExtendedYear();
|
|
internalSet(UCAL_EXTENDED_YEAR, year);
|
|
}
|
|
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - bf= %s - y=%d\n", __FILE__, __LINE__, fldName(bestField), year);
|
|
#endif
|
|
|
|
// Get the Julian day of the day BEFORE the start of this year.
|
|
// If useMonth is true, get the day before the start of the month.
|
|
|
|
// give calendar subclass a chance to have a default 'first' month
|
|
int8_t month;
|
|
|
|
if(isSet(UCAL_MONTH)) {
|
|
month = (int8_t)internalGet(UCAL_MONTH);
|
|
} else {
|
|
month = (int8_t)getDefaultMonthInYear();
|
|
}
|
|
|
|
int32_t julianDay = handleComputeMonthStart(year, useMonth ? month : 0, useMonth);
|
|
|
|
if (bestField == UCAL_DAY_OF_MONTH) {
|
|
|
|
// give calendar subclass a chance to have a default 'first' dom
|
|
int32_t dayOfMonth;
|
|
if(isSet(UCAL_DAY_OF_MONTH)) {
|
|
dayOfMonth = internalGet(UCAL_DAY_OF_MONTH,1);
|
|
} else {
|
|
dayOfMonth = getDefaultDayInMonth(month);
|
|
}
|
|
return julianDay + dayOfMonth;
|
|
}
|
|
|
|
if (bestField == UCAL_DAY_OF_YEAR) {
|
|
return julianDay + internalGet(UCAL_DAY_OF_YEAR);
|
|
}
|
|
|
|
int32_t firstDayOfWeek = getFirstDayOfWeek(); // Localized fdw
|
|
|
|
// At this point julianDay is the 0-based day BEFORE the first day of
|
|
// January 1, year 1 of the given calendar. If julianDay == 0, it
|
|
// specifies (Jan. 1, 1) - 1, in whatever calendar we are using (Julian
|
|
// or Gregorian). (or it is before the month we are in, if useMonth is True)
|
|
|
|
// At this point we need to process the WEEK_OF_MONTH or
|
|
// WEEK_OF_YEAR, which are similar, or the DAY_OF_WEEK_IN_MONTH.
|
|
// First, perform initial shared computations. These locate the
|
|
// first week of the period.
|
|
|
|
// Get the 0-based localized DOW of day one of the month or year.
|
|
// Valid range 0..6.
|
|
int32_t first = julianDayToDayOfWeek(julianDay + 1) - firstDayOfWeek;
|
|
if (first < 0) {
|
|
first += 7;
|
|
}
|
|
|
|
int32_t dowLocal = getLocalDOW();
|
|
|
|
// Find the first target DOW (dowLocal) in the month or year.
|
|
// Actually, it may be just before the first of the month or year.
|
|
// It will be an integer from -5..7.
|
|
int32_t date = 1 - first + dowLocal;
|
|
|
|
if (bestField == UCAL_DAY_OF_WEEK_IN_MONTH) {
|
|
// Adjust the target DOW to be in the month or year.
|
|
if (date < 1) {
|
|
date += 7;
|
|
}
|
|
|
|
// The only trickiness occurs if the day-of-week-in-month is
|
|
// negative.
|
|
int32_t dim = internalGet(UCAL_DAY_OF_WEEK_IN_MONTH, 1);
|
|
if (dim >= 0) {
|
|
date += 7*(dim - 1);
|
|
|
|
} else {
|
|
// Move date to the last of this day-of-week in this month,
|
|
// then back up as needed. If dim==-1, we don't back up at
|
|
// all. If dim==-2, we back up once, etc. Don't back up
|
|
// past the first of the given day-of-week in this month.
|
|
// Note that we handle -2, -3, etc. correctly, even though
|
|
// values < -1 are technically disallowed.
|
|
int32_t m = internalGet(UCAL_MONTH, UCAL_JANUARY);
|
|
int32_t monthLength = handleGetMonthLength(year, m);
|
|
date += ((monthLength - date) / 7 + dim + 1) * 7;
|
|
}
|
|
} else {
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - bf= %s\n", __FILE__, __LINE__, fldName(bestField));
|
|
#endif
|
|
|
|
if(bestField == UCAL_WEEK_OF_YEAR) { // ------------------------------------- WOY -------------
|
|
if(!isSet(UCAL_YEAR_WOY) || // YWOY not set at all or
|
|
( (resolveFields(kYearPrecedence) != UCAL_YEAR_WOY) // YWOY doesn't have precedence
|
|
&& (fStamp[UCAL_YEAR_WOY]!=kInternallySet) ) ) { // (excluding where all fields are internally set - then YWOY is used)
|
|
// need to be sure to stay in 'real' year.
|
|
int32_t woy = internalGet(bestField);
|
|
|
|
int32_t nextJulianDay = handleComputeMonthStart(year+1, 0, FALSE); // jd of day before jan 1
|
|
int32_t nextFirst = julianDayToDayOfWeek(nextJulianDay + 1) - firstDayOfWeek;
|
|
|
|
if (nextFirst < 0) { // 0..6 ldow of Jan 1
|
|
nextFirst += 7;
|
|
}
|
|
|
|
if(woy==1) { // FIRST WEEK ---------------------------------
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - woy=%d, yp=%d, nj(%d)=%d, nf=%d", __FILE__, __LINE__,
|
|
internalGet(bestField), resolveFields(kYearPrecedence), year+1,
|
|
nextJulianDay, nextFirst);
|
|
|
|
fprintf(stderr, " next: %d DFW, min=%d \n", (7-nextFirst), getMinimalDaysInFirstWeek() );
|
|
#endif
|
|
|
|
// nextFirst is now the localized DOW of Jan 1 of y-woy+1
|
|
if((nextFirst > 0) && // Jan 1 starts on FDOW
|
|
(7-nextFirst) >= getMinimalDaysInFirstWeek()) { // or enough days in the week
|
|
// Jan 1 of (yearWoy+1) is in yearWoy+1 - recalculate JD to next year
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - was going to move JD from %d to %d [d%d]\n", __FILE__, __LINE__,
|
|
julianDay, nextJulianDay, (nextJulianDay-julianDay));
|
|
#endif
|
|
julianDay = nextJulianDay;
|
|
|
|
// recalculate 'first' [0-based local dow of jan 1]
|
|
first = julianDayToDayOfWeek(julianDay + 1) - firstDayOfWeek;
|
|
if (first < 0) {
|
|
first += 7;
|
|
}
|
|
// recalculate date.
|
|
date = 1 - first + dowLocal;
|
|
}
|
|
} else if(woy>=getLeastMaximum(bestField)) {
|
|
// could be in the last week- find out if this JD would overstep
|
|
int32_t testDate = date;
|
|
if ((7 - first) < getMinimalDaysInFirstWeek()) {
|
|
testDate += 7;
|
|
}
|
|
|
|
// Now adjust for the week number.
|
|
testDate += 7 * (woy - 1);
|
|
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - y=%d, y-1=%d doy%d, njd%d (C.F. %d)\n",
|
|
__FILE__, __LINE__, year, year-1, testDate, julianDay+testDate, nextJulianDay);
|
|
#endif
|
|
if(julianDay+testDate > nextJulianDay) { // is it past Dec 31? (nextJulianDay is day BEFORE year+1's Jan 1)
|
|
// Fire up the calculating engines.. retry YWOY = (year-1)
|
|
julianDay = handleComputeMonthStart(year-1, 0, FALSE); // jd before Jan 1 of previous year
|
|
first = julianDayToDayOfWeek(julianDay + 1) - firstDayOfWeek; // 0 based local dow of first week
|
|
|
|
if(first < 0) { // 0..6
|
|
first += 7;
|
|
}
|
|
date = 1 - first + dowLocal;
|
|
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - date now %d, jd%d, ywoy%d\n",
|
|
__FILE__, __LINE__, date, julianDay, year-1);
|
|
#endif
|
|
|
|
|
|
} /* correction needed */
|
|
} /* leastmaximum */
|
|
} /* resolvefields(year) != year_woy */
|
|
} /* bestfield != week_of_year */
|
|
|
|
// assert(bestField == WEEK_OF_MONTH || bestField == WEEK_OF_YEAR)
|
|
// Adjust for minimal days in first week
|
|
if ((7 - first) < getMinimalDaysInFirstWeek()) {
|
|
date += 7;
|
|
}
|
|
|
|
// Now adjust for the week number.
|
|
date += 7 * (internalGet(bestField) - 1);
|
|
}
|
|
|
|
return julianDay + date;
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getDefaultMonthInYear()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getDefaultDayInMonth(int32_t /*month*/)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
|
|
int32_t Calendar::getLocalDOW()
|
|
{
|
|
// Get zero-based localized DOW, valid range 0..6. This is the DOW
|
|
// we are looking for.
|
|
int32_t dowLocal = 0;
|
|
switch (resolveFields(kDOWPrecedence)) {
|
|
case DAY_OF_WEEK:
|
|
dowLocal = internalGet(UCAL_DAY_OF_WEEK) - fFirstDayOfWeek;
|
|
break;
|
|
case DOW_LOCAL:
|
|
dowLocal = internalGet(UCAL_DOW_LOCAL) - 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
dowLocal = dowLocal % 7;
|
|
if (dowLocal < 0) {
|
|
dowLocal += 7;
|
|
}
|
|
return dowLocal;
|
|
}
|
|
|
|
int32_t Calendar::handleGetExtendedYearFromWeekFields(int32_t yearWoy, int32_t woy)
|
|
{
|
|
// We have UCAL_YEAR_WOY and UCAL_WEEK_OF_YEAR - from those, determine
|
|
// what year we fall in, so that other code can set it properly.
|
|
// (code borrowed from computeWeekFields and handleComputeJulianDay)
|
|
//return yearWoy;
|
|
|
|
// First, we need a reliable DOW.
|
|
UCalendarDateFields bestField = resolveFields(kDatePrecedence); // !! Note: if subclasses have a different table, they should override handleGetExtendedYearFromWeekFields
|
|
|
|
// Now, a local DOW
|
|
int32_t dowLocal = getLocalDOW(); // 0..6
|
|
int32_t firstDayOfWeek = getFirstDayOfWeek(); // Localized fdw
|
|
int32_t jan1Start = handleComputeMonthStart(yearWoy, 0, FALSE);
|
|
int32_t nextJan1Start = handleComputeMonthStart(yearWoy+1, 0, FALSE); // next year's Jan1 start
|
|
|
|
// At this point julianDay is the 0-based day BEFORE the first day of
|
|
// January 1, year 1 of the given calendar. If julianDay == 0, it
|
|
// specifies (Jan. 1, 1) - 1, in whatever calendar we are using (Julian
|
|
// or Gregorian). (or it is before the month we are in, if useMonth is True)
|
|
|
|
// At this point we need to process the WEEK_OF_MONTH or
|
|
// WEEK_OF_YEAR, which are similar, or the DAY_OF_WEEK_IN_MONTH.
|
|
// First, perform initial shared computations. These locate the
|
|
// first week of the period.
|
|
|
|
// Get the 0-based localized DOW of day one of the month or year.
|
|
// Valid range 0..6.
|
|
int32_t first = julianDayToDayOfWeek(jan1Start + 1) - firstDayOfWeek;
|
|
if (first < 0) {
|
|
first += 7;
|
|
}
|
|
int32_t nextFirst = julianDayToDayOfWeek(nextJan1Start + 1) - firstDayOfWeek;
|
|
if (nextFirst < 0) {
|
|
nextFirst += 7;
|
|
}
|
|
|
|
int32_t minDays = getMinimalDaysInFirstWeek();
|
|
UBool jan1InPrevYear = FALSE; // January 1st in the year of WOY is the 1st week? (i.e. first week is < minimal )
|
|
UBool nextJan1InPrevYear = FALSE; // January 1st of Year of WOY + 1 is in the first week?
|
|
|
|
if((7 - first) < minDays) {
|
|
jan1InPrevYear = TRUE;
|
|
}
|
|
|
|
if((7 - nextFirst) < minDays) {
|
|
nextJan1InPrevYear = TRUE;
|
|
}
|
|
|
|
switch(bestField) {
|
|
case UCAL_WEEK_OF_YEAR:
|
|
if(woy == 1) {
|
|
if(jan1InPrevYear == TRUE) {
|
|
// the first week of January is in the previous year
|
|
// therefore WOY1 is always solidly within yearWoy
|
|
return yearWoy;
|
|
} else {
|
|
// First WOY is split between two years
|
|
if( dowLocal < first) { // we are prior to Jan 1
|
|
return yearWoy-1; // previous year
|
|
} else {
|
|
return yearWoy; // in this year
|
|
}
|
|
}
|
|
} else if(woy >= getLeastMaximum(bestField)) {
|
|
// we _might_ be in the last week..
|
|
int32_t jd = // Calculate JD of our target day:
|
|
jan1Start + // JD of Jan 1
|
|
(7-first) + // days in the first week (Jan 1.. )
|
|
(woy-1)*7 + // add the weeks of the year
|
|
dowLocal; // the local dow (0..6) of last week
|
|
if(jan1InPrevYear==FALSE) {
|
|
jd -= 7; // woy already includes Jan 1's week.
|
|
}
|
|
|
|
if( (jd+1) >= nextJan1Start ) {
|
|
// we are in week 52 or 53 etc. - actual year is yearWoy+1
|
|
return yearWoy+1;
|
|
} else {
|
|
// still in yearWoy;
|
|
return yearWoy;
|
|
}
|
|
} else {
|
|
// we're not possibly in the last week -must be ywoy
|
|
return yearWoy;
|
|
}
|
|
break;
|
|
|
|
case UCAL_DATE:
|
|
if((internalGet(UCAL_MONTH)==0) &&
|
|
(woy >= getLeastMaximum(UCAL_WEEK_OF_YEAR))) {
|
|
return yearWoy+1; // month 0, late woy = in the next year
|
|
} else if(woy==1) {
|
|
//if(nextJan1InPrevYear) {
|
|
if(internalGet(UCAL_MONTH)==0) {
|
|
return yearWoy;
|
|
} else {
|
|
return yearWoy-1;
|
|
}
|
|
//}
|
|
}
|
|
|
|
//(internalGet(UCAL_DATE) <= (7-first)) /* && in minDow */ ) {
|
|
//within 1st week and in this month..
|
|
//return yearWoy+1;
|
|
return yearWoy;
|
|
break;
|
|
|
|
default: // assume the year is appropriate
|
|
return yearWoy;
|
|
break;
|
|
}
|
|
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - forgot a return on field %s\n", __FILE__, __LINE__, fldName(bestField));
|
|
#endif
|
|
|
|
return yearWoy;
|
|
}
|
|
|
|
int32_t Calendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const
|
|
{
|
|
return handleComputeMonthStart(extendedYear, month+1, TRUE) -
|
|
handleComputeMonthStart(extendedYear, month, TRUE);
|
|
}
|
|
|
|
int32_t Calendar::handleGetYearLength(int32_t eyear) const {
|
|
return handleComputeMonthStart(eyear+1, 0, FALSE) -
|
|
handleComputeMonthStart(eyear, 0, FALSE);
|
|
}
|
|
|
|
int32_t
|
|
Calendar::getActualMaximum(UCalendarDateFields field, UErrorCode& status) const
|
|
{
|
|
int32_t result;
|
|
switch (field) {
|
|
case UCAL_DATE:
|
|
{
|
|
if(U_FAILURE(status)) return 0;
|
|
Calendar *cal = clone();
|
|
if(!cal) { status = U_MEMORY_ALLOCATION_ERROR; return 0; }
|
|
cal->prepareGetActual(field,FALSE,status);
|
|
result = handleGetMonthLength(cal->get(UCAL_EXTENDED_YEAR, status), cal->get(UCAL_MONTH, status));
|
|
delete cal;
|
|
}
|
|
break;
|
|
|
|
case UCAL_DAY_OF_YEAR:
|
|
{
|
|
if(U_FAILURE(status)) return 0;
|
|
Calendar *cal = clone();
|
|
if(!cal) { status = U_MEMORY_ALLOCATION_ERROR; return 0; }
|
|
cal->prepareGetActual(field,FALSE,status);
|
|
result = handleGetYearLength(cal->get(UCAL_EXTENDED_YEAR, status));
|
|
delete cal;
|
|
}
|
|
break;
|
|
|
|
case DAY_OF_WEEK:
|
|
case AM_PM:
|
|
case HOUR:
|
|
case HOUR_OF_DAY:
|
|
case MINUTE:
|
|
case SECOND:
|
|
case MILLISECOND:
|
|
case ZONE_OFFSET:
|
|
case DST_OFFSET:
|
|
case DOW_LOCAL:
|
|
case JULIAN_DAY:
|
|
case MILLISECONDS_IN_DAY:
|
|
// These fields all have fixed minima/maxima
|
|
result = getMaximum(field);
|
|
break;
|
|
|
|
default:
|
|
// For all other fields, do it the hard way....
|
|
result = getActualHelper(field, getLeastMaximum(field), getMaximum(field),status);
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* Prepare this calendar for computing the actual minimum or maximum.
|
|
* This method modifies this calendar's fields; it is called on a
|
|
* temporary calendar.
|
|
*
|
|
* <p>Rationale: The semantics of getActualXxx() is to return the
|
|
* maximum or minimum value that the given field can take, taking into
|
|
* account other relevant fields. In general these other fields are
|
|
* larger fields. For example, when computing the actual maximum
|
|
* DATE, the current value of DATE itself is ignored,
|
|
* as is the value of any field smaller.
|
|
*
|
|
* <p>The time fields all have fixed minima and maxima, so we don't
|
|
* need to worry about them. This also lets us set the
|
|
* MILLISECONDS_IN_DAY to zero to erase any effects the time fields
|
|
* might have when computing date fields.
|
|
*
|
|
* <p>DAY_OF_WEEK is adjusted specially for the WEEK_OF_MONTH and
|
|
* WEEK_OF_YEAR fields to ensure that they are computed correctly.
|
|
* @internal
|
|
*/
|
|
void Calendar::prepareGetActual(UCalendarDateFields field, UBool isMinimum, UErrorCode &status)
|
|
{
|
|
set(UCAL_MILLISECONDS_IN_DAY, 0);
|
|
|
|
switch (field) {
|
|
case UCAL_YEAR:
|
|
case UCAL_YEAR_WOY:
|
|
case UCAL_EXTENDED_YEAR:
|
|
set(UCAL_DAY_OF_YEAR, getGreatestMinimum(UCAL_DAY_OF_YEAR));
|
|
break;
|
|
|
|
case UCAL_MONTH:
|
|
set(UCAL_DATE, getGreatestMinimum(UCAL_DATE));
|
|
break;
|
|
|
|
case UCAL_DAY_OF_WEEK_IN_MONTH:
|
|
// For dowim, the maximum occurs for the DOW of the first of the
|
|
// month.
|
|
set(UCAL_DATE, 1);
|
|
set(UCAL_DAY_OF_WEEK, get(UCAL_DAY_OF_WEEK, status)); // Make this user set
|
|
break;
|
|
|
|
case UCAL_WEEK_OF_MONTH:
|
|
case UCAL_WEEK_OF_YEAR:
|
|
// If we're counting weeks, set the day of the week to either the
|
|
// first or last localized DOW. We know the last week of a month
|
|
// or year will contain the first day of the week, and that the
|
|
// first week will contain the last DOW.
|
|
{
|
|
int32_t dow = fFirstDayOfWeek;
|
|
if (isMinimum) {
|
|
dow = (dow + 6) % 7; // set to last DOW
|
|
if (dow < UCAL_SUNDAY) {
|
|
dow += 7;
|
|
}
|
|
}
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "prepareGetActualHelper(WOM/WOY) - dow=%d\n", dow);
|
|
#endif
|
|
set(UCAL_DAY_OF_WEEK, dow);
|
|
}
|
|
break;
|
|
default:
|
|
;
|
|
}
|
|
|
|
// Do this last to give it the newest time stamp
|
|
set(field, getGreatestMinimum(field));
|
|
}
|
|
|
|
int32_t Calendar::getActualHelper(UCalendarDateFields field, int32_t startValue, int32_t endValue, UErrorCode &status) const
|
|
{
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "getActualHelper(%d,%d .. %d, %s)\n", field, startValue, endValue, u_errorName(status));
|
|
#endif
|
|
if (startValue == endValue) {
|
|
// if we know that the maximum value is always the same, just return it
|
|
return startValue;
|
|
}
|
|
|
|
int32_t delta = (endValue > startValue) ? 1 : -1;
|
|
|
|
// clone the calendar so we don't mess with the real one, and set it to
|
|
// accept anything for the field values
|
|
if(U_FAILURE(status)) return startValue;
|
|
Calendar *work = clone();
|
|
if(!work) { status = U_MEMORY_ALLOCATION_ERROR; return startValue; }
|
|
work->setLenient(TRUE);
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - getActualHelper - %s\n", __FILE__, __LINE__, u_errorName(status));
|
|
#endif
|
|
work->prepareGetActual(field, delta < 0, status);
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - getActualHelper - %s\n", __FILE__, __LINE__, u_errorName(status));
|
|
#endif
|
|
|
|
// now try each value from the start to the end one by one until
|
|
// we get a value that normalizes to another value. The last value that
|
|
// normalizes to itself is the actual maximum for the current date
|
|
int32_t result = startValue;
|
|
do {
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - getActualHelper - %s\n", __FILE__, __LINE__, u_errorName(status));
|
|
#endif
|
|
work->set(field, startValue);
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "%s:%d - getActualHelper - %s (set to %d)\n", __FILE__, __LINE__, u_errorName(status), startValue);
|
|
#endif
|
|
if (work->get(field, status) != startValue) {
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "getActualHelper(fld %d) - got %d (not %d), BREAK - %s\n", field, work->get(field,status), startValue, u_errorName(status));
|
|
#endif
|
|
break;
|
|
} else {
|
|
result = startValue;
|
|
startValue += delta;
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "getActualHelper(%d) result=%d (start), start += %d to %d\n", field, result, delta, startValue);
|
|
#endif
|
|
}
|
|
} while (result != endValue && U_SUCCESS(status));
|
|
delete work;
|
|
#if defined (U_DEBUG_CAL)
|
|
fprintf(stderr, "getActualHelper(%d) = %d\n", field, result);
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
|
|
// -------------------------------------
|
|
|
|
void
|
|
Calendar::setWeekCountData(const Locale& desiredLocale, UErrorCode& status)
|
|
{
|
|
// Read the week count data from the resource bundle. This should
|
|
// have the form:
|
|
//
|
|
// DateTimeElements:intvector {
|
|
// 1, // first day of week
|
|
// 1 // min days in week
|
|
// }
|
|
// Both have a range of 1..7
|
|
|
|
|
|
if (U_FAILURE(status)) return;
|
|
|
|
fFirstDayOfWeek = UCAL_SUNDAY;
|
|
fMinimalDaysInFirstWeek = 1;
|
|
|
|
UResourceBundle *resource = ures_open(NULL, desiredLocale.getName(), &status);
|
|
|
|
// If the resource data doesn't seem to be present at all, then use last-resort
|
|
// hard-coded data.
|
|
if (U_FAILURE(status))
|
|
{
|
|
status = U_USING_FALLBACK_WARNING;
|
|
ures_close(resource);
|
|
return;
|
|
}
|
|
|
|
//dateTimeElements = resource.getStringArray(kDateTimeElements, count, status);
|
|
UResourceBundle *dateTimeElements = ures_getByKey(resource, kDateTimeElements, NULL, &status); // TODO: should be per calendar?!
|
|
if (U_SUCCESS(status)) {
|
|
int32_t arrLen;
|
|
const int32_t *dateTimeElementsArr = ures_getIntVector(dateTimeElements, &arrLen, &status);
|
|
|
|
if(U_SUCCESS(status) && arrLen == 2
|
|
&& 1 <= dateTimeElementsArr[0] && dateTimeElementsArr[0] <= 7
|
|
&& 1 <= dateTimeElementsArr[1] && dateTimeElementsArr[1] <= 7)
|
|
{
|
|
fFirstDayOfWeek = (UCalendarDaysOfWeek)dateTimeElementsArr[0];
|
|
fMinimalDaysInFirstWeek = (uint8_t)dateTimeElementsArr[1];
|
|
}
|
|
else {
|
|
status = U_INVALID_FORMAT_ERROR;
|
|
}
|
|
}
|
|
|
|
ures_close(dateTimeElements);
|
|
ures_close(resource);
|
|
}
|
|
|
|
/**
|
|
* Recompute the time and update the status fields isTimeSet
|
|
* and areFieldsSet. Callers should check isTimeSet and only
|
|
* call this method if isTimeSet is false.
|
|
*/
|
|
void
|
|
Calendar::updateTime(UErrorCode& status)
|
|
{
|
|
computeTime(status);
|
|
if(U_FAILURE(status))
|
|
return;
|
|
|
|
// If we are lenient, we need to recompute the fields to normalize
|
|
// the values. Also, if we haven't set all the fields yet (i.e.,
|
|
// in a newly-created object), we need to fill in the fields. [LIU]
|
|
if (isLenient() || ! fAreAllFieldsSet)
|
|
fAreFieldsSet = FALSE;
|
|
|
|
fIsTimeSet = TRUE;
|
|
}
|
|
|
|
|
|
|
|
U_NAMESPACE_END
|
|
|
|
U_CFUNC UBool calendar_cleanup(void) {
|
|
if (gService) {
|
|
delete gService;
|
|
gService = NULL;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
|
|
//eof
|