1183 lines
32 KiB
C++
1183 lines
32 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 "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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#ifdef U_DEBUG_CALSVC
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#include <stdio.h>
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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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int32_t len = 0;
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UnicodeString myString = ures_getUnicodeStringByKey(rb, Calendar::kDefaultCalendar, &status);
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#ifdef U_DEBUG_CALSVC
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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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// 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),
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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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if(zone == 0) {
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success = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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clear();
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fZone = zone;
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setWeekCountData(aLocale, success);
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}
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// -------------------------------------
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Calendar::Calendar(const 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),
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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 = zone.clone();
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setWeekCountData(aLocale, success);
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}
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// -------------------------------------
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Calendar::~Calendar()
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{
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delete fZone;
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}
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// -------------------------------------
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Calendar::Calendar(const Calendar &source)
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: UObject(source)
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{
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fZone = 0;
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*this = source;
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}
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// -------------------------------------
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Calendar &
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Calendar::operator=(const Calendar &right)
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{
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if (this != &right)
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{
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uprv_arrayCopy(right.fFields, fFields, UCAL_FIELD_COUNT);
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uprv_arrayCopy(right.fIsSet, fIsSet, UCAL_FIELD_COUNT);
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uprv_arrayCopy(right.fStamp, fStamp, UCAL_FIELD_COUNT);
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fTime = right.fTime;
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fIsTimeSet = right.fIsTimeSet;
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fAreAllFieldsSet = right.fAreAllFieldsSet;
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fAreFieldsSet = right.fAreFieldsSet;
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fLenient = right.fLenient;
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delete fZone;
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fZone = right.fZone->clone();
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fFirstDayOfWeek = right.fFirstDayOfWeek;
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fMinimalDaysInFirstWeek = right.fMinimalDaysInFirstWeek;
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fNextStamp = right.fNextStamp;
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}
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return *this;
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}
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// -------------------------------------
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Calendar*
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Calendar::createInstance(UErrorCode& success)
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{
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return createInstance(TimeZone::createDefault(), Locale::getDefault(), success);
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}
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// -------------------------------------
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Calendar*
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Calendar::createInstance(const TimeZone& zone, UErrorCode& success)
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{
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return createInstance(zone, Locale::getDefault(), success);
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}
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// -------------------------------------
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Calendar*
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Calendar::createInstance(const Locale& aLocale, UErrorCode& success)
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{
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return createInstance(TimeZone::createDefault(), aLocale, success);
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}
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|
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// ------------------------------------- Adopting
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// Note: this is the bottleneck that actually calls the service routines.
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|
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Calendar*
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Calendar::createInstance(TimeZone* zone, const Locale& aLocale, UErrorCode& success)
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{
|
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UObject* u = getService()->get(aLocale, LocaleKey::KIND_ANY, success);
|
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Calendar* c = NULL;
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if(U_FAILURE(success) || !u) {
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delete zone;
|
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if(U_SUCCESS(success)) { // Propagate some kind of err
|
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success = U_INTERNAL_PROGRAM_ERROR;
|
|
}
|
|
return NULL;
|
|
}
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|
|
|
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();
|
|
if(len > sizeof(tmp)-1) {
|
|
len = sizeof(tmp)-1;
|
|
}
|
|
str.extract(0,len,tmp);
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|
tmp[len]=0;
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|
|
|
#ifdef U_DEBUG_CALSVC
|
|
// fprintf(stderr, "createInstance(%s) told to look at %s..\n", (const char*)aLocale.getName(), tmp);
|
|
#endif
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|
|
// Create a Locale over this string
|
|
Locale l(tmp);
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|
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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;
|
|
}
|
|
c->adoptTimeZone(zone); // Set the correct time zone
|
|
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;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
// -------------------------------------
|
|
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
|
|
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
|
|
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;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
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;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
int32_t
|
|
Calendar::getActualMaximum(UCalendarDateFields field, UErrorCode& status) const
|
|
{
|
|
int32_t fieldValue = getLeastMaximum(field);
|
|
int32_t endValue = getMaximum(field);
|
|
|
|
// if we know that the maximum 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);
|
|
|
|
// if we're counting weeks, set the day of the week to Sunday. We know the
|
|
// last week of a month or year will contain the first day of the week.
|
|
if (field == UCAL_WEEK_OF_YEAR || field == UCAL_WEEK_OF_MONTH)
|
|
work->set(UCAL_DAY_OF_WEEK, fFirstDayOfWeek);
|
|
|
|
// 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 maximum 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;
|
|
}
|
|
|
|
// -------------------------------------
|
|
|
|
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);
|
|
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
|