diff options
Diffstat (limited to 'intl/icu/source/i18n/tzrule.cpp')
| -rw-r--r-- | intl/icu/source/i18n/tzrule.cpp | 629 |
1 files changed, 629 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/tzrule.cpp b/intl/icu/source/i18n/tzrule.cpp new file mode 100644 index 0000000000..759a2d4c67 --- /dev/null +++ b/intl/icu/source/i18n/tzrule.cpp @@ -0,0 +1,629 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* Copyright (C) 2007-2012, International Business Machines Corporation and +* others. All Rights Reserved. +******************************************************************************* +*/ + +#include "utypeinfo.h" // for 'typeid' to work + +#include "unicode/utypes.h" + +#if !UCONFIG_NO_FORMATTING + +#include "unicode/tzrule.h" +#include "unicode/ucal.h" +#include "gregoimp.h" +#include "cmemory.h" +#include "uarrsort.h" + +U_CDECL_BEGIN +// UComparator function for sorting start times +static int32_t U_CALLCONV +compareDates(const void * /*context*/, const void *left, const void *right) { + UDate l = *((UDate*)left); + UDate r = *((UDate*)right); + int32_t res = l < r ? -1 : (l == r ? 0 : 1); + return res; +} +U_CDECL_END + +U_NAMESPACE_BEGIN + +TimeZoneRule::TimeZoneRule(const UnicodeString& name, int32_t rawOffset, int32_t dstSavings) +: UObject(), fName(name), fRawOffset(rawOffset), fDSTSavings(dstSavings) { +} + +TimeZoneRule::TimeZoneRule(const TimeZoneRule& source) +: UObject(source), fName(source.fName), fRawOffset(source.fRawOffset), fDSTSavings(source.fDSTSavings) { +} + +TimeZoneRule::~TimeZoneRule() { +} + +TimeZoneRule& +TimeZoneRule::operator=(const TimeZoneRule& right) { + if (this != &right) { + fName = right.fName; + fRawOffset = right.fRawOffset; + fDSTSavings = right.fDSTSavings; + } + return *this; +} + +UBool +TimeZoneRule::operator==(const TimeZoneRule& that) const { + return ((this == &that) || + (typeid(*this) == typeid(that) && + fName == that.fName && + fRawOffset == that.fRawOffset && + fDSTSavings == that.fDSTSavings)); +} + +UBool +TimeZoneRule::operator!=(const TimeZoneRule& that) const { + return !operator==(that); +} + +UnicodeString& +TimeZoneRule::getName(UnicodeString& name) const { + name = fName; + return name; +} + +int32_t +TimeZoneRule::getRawOffset(void) const { + return fRawOffset; +} + +int32_t +TimeZoneRule::getDSTSavings(void) const { + return fDSTSavings; +} + +UBool +TimeZoneRule::isEquivalentTo(const TimeZoneRule& other) const { + return ((this == &other) || + (typeid(*this) == typeid(other) && + fRawOffset == other.fRawOffset && + fDSTSavings == other.fDSTSavings)); +} + + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(InitialTimeZoneRule) + +InitialTimeZoneRule::InitialTimeZoneRule(const UnicodeString& name, + int32_t rawOffset, + int32_t dstSavings) +: TimeZoneRule(name, rawOffset, dstSavings) { +} + +InitialTimeZoneRule::InitialTimeZoneRule(const InitialTimeZoneRule& source) +: TimeZoneRule(source) { +} + +InitialTimeZoneRule::~InitialTimeZoneRule() { +} + +InitialTimeZoneRule* +InitialTimeZoneRule::clone() const { + return new InitialTimeZoneRule(*this); +} + +InitialTimeZoneRule& +InitialTimeZoneRule::operator=(const InitialTimeZoneRule& right) { + if (this != &right) { + TimeZoneRule::operator=(right); + } + return *this; +} + +UBool +InitialTimeZoneRule::operator==(const TimeZoneRule& that) const { + return ((this == &that) || + (typeid(*this) == typeid(that) && + TimeZoneRule::operator==(that))); +} + +UBool +InitialTimeZoneRule::operator!=(const TimeZoneRule& that) const { + return !operator==(that); +} + +UBool +InitialTimeZoneRule::isEquivalentTo(const TimeZoneRule& other) const { + if (this == &other) { + return TRUE; + } + if (typeid(*this) != typeid(other) || TimeZoneRule::isEquivalentTo(other) == FALSE) { + return FALSE; + } + return TRUE; +} + +UBool +InitialTimeZoneRule::getFirstStart(int32_t /*prevRawOffset*/, + int32_t /*prevDSTSavings*/, + UDate& /*result*/) const { + return FALSE; +} + +UBool +InitialTimeZoneRule::getFinalStart(int32_t /*prevRawOffset*/, + int32_t /*prevDSTSavings*/, + UDate& /*result*/) const { + return FALSE; +} + +UBool +InitialTimeZoneRule::getNextStart(UDate /*base*/, + int32_t /*prevRawOffset*/, + int32_t /*prevDSTSavings*/, + UBool /*inclusive*/, + UDate& /*result*/) const { + return FALSE; +} + +UBool +InitialTimeZoneRule::getPreviousStart(UDate /*base*/, + int32_t /*prevRawOffset*/, + int32_t /*prevDSTSavings*/, + UBool /*inclusive*/, + UDate& /*result*/) const { + return FALSE; +} + + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(AnnualTimeZoneRule) + +const int32_t AnnualTimeZoneRule::MAX_YEAR = 0x7FFFFFFF; /* max signed int32 */ + +AnnualTimeZoneRule::AnnualTimeZoneRule(const UnicodeString& name, + int32_t rawOffset, + int32_t dstSavings, + const DateTimeRule& dateTimeRule, + int32_t startYear, + int32_t endYear) +: TimeZoneRule(name, rawOffset, dstSavings), fDateTimeRule(new DateTimeRule(dateTimeRule)), + fStartYear(startYear), fEndYear(endYear) { +} + +AnnualTimeZoneRule::AnnualTimeZoneRule(const UnicodeString& name, + int32_t rawOffset, + int32_t dstSavings, + DateTimeRule* dateTimeRule, + int32_t startYear, + int32_t endYear) +: TimeZoneRule(name, rawOffset, dstSavings), fDateTimeRule(dateTimeRule), + fStartYear(startYear), fEndYear(endYear) { +} + +AnnualTimeZoneRule::AnnualTimeZoneRule(const AnnualTimeZoneRule& source) +: TimeZoneRule(source), fDateTimeRule(new DateTimeRule(*(source.fDateTimeRule))), + fStartYear(source.fStartYear), fEndYear(source.fEndYear) { +} + +AnnualTimeZoneRule::~AnnualTimeZoneRule() { + delete fDateTimeRule; +} + +AnnualTimeZoneRule* +AnnualTimeZoneRule::clone(void) const { + return new AnnualTimeZoneRule(*this); +} + +AnnualTimeZoneRule& +AnnualTimeZoneRule::operator=(const AnnualTimeZoneRule& right) { + if (this != &right) { + TimeZoneRule::operator=(right); + delete fDateTimeRule; + fDateTimeRule = right.fDateTimeRule->clone(); + fStartYear = right.fStartYear; + fEndYear = right.fEndYear; + } + return *this; +} + +UBool +AnnualTimeZoneRule::operator==(const TimeZoneRule& that) const { + if (this == &that) { + return TRUE; + } + if (typeid(*this) != typeid(that)) { + return FALSE; + } + AnnualTimeZoneRule *atzr = (AnnualTimeZoneRule*)&that; + return (*fDateTimeRule == *(atzr->fDateTimeRule) && + fStartYear == atzr->fStartYear && + fEndYear == atzr->fEndYear); +} + +UBool +AnnualTimeZoneRule::operator!=(const TimeZoneRule& that) const { + return !operator==(that); +} + +const DateTimeRule* +AnnualTimeZoneRule::getRule() const { + return fDateTimeRule; +} + +int32_t +AnnualTimeZoneRule::getStartYear() const { + return fStartYear; +} + +int32_t +AnnualTimeZoneRule::getEndYear() const { + return fEndYear; +} + +UBool +AnnualTimeZoneRule::getStartInYear(int32_t year, + int32_t prevRawOffset, + int32_t prevDSTSavings, + UDate &result) const { + if (year < fStartYear || year > fEndYear) { + return FALSE; + } + double ruleDay; + DateTimeRule::DateRuleType type = fDateTimeRule->getDateRuleType(); + if (type == DateTimeRule::DOM) { + ruleDay = Grego::fieldsToDay(year, fDateTimeRule->getRuleMonth(), fDateTimeRule->getRuleDayOfMonth()); + } else { + UBool after = TRUE; + if (type == DateTimeRule::DOW) { + // Normalize DOW rule into DOW_GEQ_DOM or DOW_LEQ_DOM + int32_t weeks = fDateTimeRule->getRuleWeekInMonth(); + if (weeks > 0) { + ruleDay = Grego::fieldsToDay(year, fDateTimeRule->getRuleMonth(), 1); + ruleDay += 7 * (weeks - 1); + } else { + after = FALSE; + ruleDay = Grego::fieldsToDay(year, fDateTimeRule->getRuleMonth(), + Grego::monthLength(year, fDateTimeRule->getRuleMonth())); + ruleDay += 7 * (weeks + 1); + } + } else { + int32_t month = fDateTimeRule->getRuleMonth(); + int32_t dom = fDateTimeRule->getRuleDayOfMonth(); + if (type == DateTimeRule::DOW_LEQ_DOM) { + after = FALSE; + // Handle Feb <=29 + if (month == UCAL_FEBRUARY && dom == 29 && !Grego::isLeapYear(year)) { + dom--; + } + } + ruleDay = Grego::fieldsToDay(year, month, dom); + } + int32_t dow = Grego::dayOfWeek(ruleDay); + int32_t delta = fDateTimeRule->getRuleDayOfWeek() - dow; + if (after) { + delta = delta < 0 ? delta + 7 : delta; + } else { + delta = delta > 0 ? delta - 7 : delta; + } + ruleDay += delta; + } + + result = ruleDay*U_MILLIS_PER_DAY + fDateTimeRule->getRuleMillisInDay(); + if (fDateTimeRule->getTimeRuleType() != DateTimeRule::UTC_TIME) { + result -= prevRawOffset; + } + if (fDateTimeRule->getTimeRuleType() == DateTimeRule::WALL_TIME) { + result -= prevDSTSavings; + } + return TRUE; +} + +UBool +AnnualTimeZoneRule::isEquivalentTo(const TimeZoneRule& other) const { + if (this == &other) { + return TRUE; + } + if (typeid(*this) != typeid(other) || TimeZoneRule::isEquivalentTo(other) == FALSE) { + return FALSE; + } + AnnualTimeZoneRule* that = (AnnualTimeZoneRule*)&other; + return (*fDateTimeRule == *(that->fDateTimeRule) && + fStartYear == that->fStartYear && + fEndYear == that->fEndYear); +} + +UBool +AnnualTimeZoneRule::getFirstStart(int32_t prevRawOffset, + int32_t prevDSTSavings, + UDate& result) const { + return getStartInYear(fStartYear, prevRawOffset, prevDSTSavings, result); +} + +UBool +AnnualTimeZoneRule::getFinalStart(int32_t prevRawOffset, + int32_t prevDSTSavings, + UDate& result) const { + if (fEndYear == MAX_YEAR) { + return FALSE; + } + return getStartInYear(fEndYear, prevRawOffset, prevDSTSavings, result); +} + +UBool +AnnualTimeZoneRule::getNextStart(UDate base, + int32_t prevRawOffset, + int32_t prevDSTSavings, + UBool inclusive, + UDate& result) const { + int32_t year, month, dom, dow, doy, mid; + Grego::timeToFields(base, year, month, dom, dow, doy, mid); + if (year < fStartYear) { + return getFirstStart(prevRawOffset, prevDSTSavings, result); + } + UDate tmp; + if (getStartInYear(year, prevRawOffset, prevDSTSavings, tmp)) { + if (tmp < base || (!inclusive && (tmp == base))) { + // Return the next one + return getStartInYear(year + 1, prevRawOffset, prevDSTSavings, result); + } else { + result = tmp; + return TRUE; + } + } + return FALSE; +} + +UBool +AnnualTimeZoneRule::getPreviousStart(UDate base, + int32_t prevRawOffset, + int32_t prevDSTSavings, + UBool inclusive, + UDate& result) const { + int32_t year, month, dom, dow, doy, mid; + Grego::timeToFields(base, year, month, dom, dow, doy, mid); + if (year > fEndYear) { + return getFinalStart(prevRawOffset, prevDSTSavings, result); + } + UDate tmp; + if (getStartInYear(year, prevRawOffset, prevDSTSavings, tmp)) { + if (tmp > base || (!inclusive && (tmp == base))) { + // Return the previous one + return getStartInYear(year - 1, prevRawOffset, prevDSTSavings, result); + } else { + result = tmp; + return TRUE; + } + } + return FALSE; +} + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TimeArrayTimeZoneRule) + +TimeArrayTimeZoneRule::TimeArrayTimeZoneRule(const UnicodeString& name, + int32_t rawOffset, + int32_t dstSavings, + const UDate* startTimes, + int32_t numStartTimes, + DateTimeRule::TimeRuleType timeRuleType) +: TimeZoneRule(name, rawOffset, dstSavings), fTimeRuleType(timeRuleType), + fStartTimes(NULL) { + UErrorCode status = U_ZERO_ERROR; + initStartTimes(startTimes, numStartTimes, status); + //TODO - status? +} + + +TimeArrayTimeZoneRule::TimeArrayTimeZoneRule(const TimeArrayTimeZoneRule& source) +: TimeZoneRule(source), fTimeRuleType(source.fTimeRuleType), fStartTimes(NULL) { + UErrorCode status = U_ZERO_ERROR; + initStartTimes(source.fStartTimes, source.fNumStartTimes, status); + //TODO - status? +} + + +TimeArrayTimeZoneRule::~TimeArrayTimeZoneRule() { + if (fStartTimes != NULL && fStartTimes != fLocalStartTimes) { + uprv_free(fStartTimes); + } +} + +TimeArrayTimeZoneRule* +TimeArrayTimeZoneRule::clone(void) const { + return new TimeArrayTimeZoneRule(*this); +} + + +TimeArrayTimeZoneRule& +TimeArrayTimeZoneRule::operator=(const TimeArrayTimeZoneRule& right) { + if (this != &right) { + TimeZoneRule::operator=(right); + UErrorCode status = U_ZERO_ERROR; + initStartTimes(right.fStartTimes, right.fNumStartTimes, status); + //TODO - status? + fTimeRuleType = right.fTimeRuleType; + } + return *this; +} + +UBool +TimeArrayTimeZoneRule::operator==(const TimeZoneRule& that) const { + if (this == &that) { + return TRUE; + } + if (typeid(*this) != typeid(that) || TimeZoneRule::operator==(that) == FALSE) { + return FALSE; + } + TimeArrayTimeZoneRule *tatzr = (TimeArrayTimeZoneRule*)&that; + if (fTimeRuleType != tatzr->fTimeRuleType || + fNumStartTimes != tatzr->fNumStartTimes) { + return FALSE; + } + // Compare start times + UBool res = TRUE; + for (int32_t i = 0; i < fNumStartTimes; i++) { + if (fStartTimes[i] != tatzr->fStartTimes[i]) { + res = FALSE; + break; + } + } + return res; +} + +UBool +TimeArrayTimeZoneRule::operator!=(const TimeZoneRule& that) const { + return !operator==(that); +} + +DateTimeRule::TimeRuleType +TimeArrayTimeZoneRule::getTimeType(void) const { + return fTimeRuleType; +} + +UBool +TimeArrayTimeZoneRule::getStartTimeAt(int32_t index, UDate& result) const { + if (index >= fNumStartTimes || index < 0) { + return FALSE; + } + result = fStartTimes[index]; + return TRUE; +} + +int32_t +TimeArrayTimeZoneRule::countStartTimes(void) const { + return fNumStartTimes; +} + +UBool +TimeArrayTimeZoneRule::isEquivalentTo(const TimeZoneRule& other) const { + if (this == &other) { + return TRUE; + } + if (typeid(*this) != typeid(other) || TimeZoneRule::isEquivalentTo(other) == FALSE) { + return FALSE; + } + TimeArrayTimeZoneRule* that = (TimeArrayTimeZoneRule*)&other; + if (fTimeRuleType != that->fTimeRuleType || + fNumStartTimes != that->fNumStartTimes) { + return FALSE; + } + // Compare start times + UBool res = TRUE; + for (int32_t i = 0; i < fNumStartTimes; i++) { + if (fStartTimes[i] != that->fStartTimes[i]) { + res = FALSE; + break; + } + } + return res; +} + +UBool +TimeArrayTimeZoneRule::getFirstStart(int32_t prevRawOffset, + int32_t prevDSTSavings, + UDate& result) const { + if (fNumStartTimes <= 0 || fStartTimes == NULL) { + return FALSE; + } + result = getUTC(fStartTimes[0], prevRawOffset, prevDSTSavings); + return TRUE; +} + +UBool +TimeArrayTimeZoneRule::getFinalStart(int32_t prevRawOffset, + int32_t prevDSTSavings, + UDate& result) const { + if (fNumStartTimes <= 0 || fStartTimes == NULL) { + return FALSE; + } + result = getUTC(fStartTimes[fNumStartTimes - 1], prevRawOffset, prevDSTSavings); + return TRUE; +} + +UBool +TimeArrayTimeZoneRule::getNextStart(UDate base, + int32_t prevRawOffset, + int32_t prevDSTSavings, + UBool inclusive, + UDate& result) const { + int32_t i = fNumStartTimes - 1; + for (; i >= 0; i--) { + UDate time = getUTC(fStartTimes[i], prevRawOffset, prevDSTSavings); + if (time < base || (!inclusive && time == base)) { + break; + } + result = time; + } + if (i == fNumStartTimes - 1) { + return FALSE; + } + return TRUE; +} + +UBool +TimeArrayTimeZoneRule::getPreviousStart(UDate base, + int32_t prevRawOffset, + int32_t prevDSTSavings, + UBool inclusive, + UDate& result) const { + int32_t i = fNumStartTimes - 1; + for (; i >= 0; i--) { + UDate time = getUTC(fStartTimes[i], prevRawOffset, prevDSTSavings); + if (time < base || (inclusive && time == base)) { + result = time; + return TRUE; + } + } + return FALSE; +} + + +// ---- private methods ------ + +UBool +TimeArrayTimeZoneRule::initStartTimes(const UDate source[], int32_t size, UErrorCode& status) { + // Free old array + if (fStartTimes != NULL && fStartTimes != fLocalStartTimes) { + uprv_free(fStartTimes); + } + // Allocate new one if needed + if (size > TIMEARRAY_STACK_BUFFER_SIZE) { + fStartTimes = (UDate*)uprv_malloc(sizeof(UDate)*size); + if (fStartTimes == NULL) { + status = U_MEMORY_ALLOCATION_ERROR; + fNumStartTimes = 0; + return FALSE; + } + } else { + fStartTimes = (UDate*)fLocalStartTimes; + } + uprv_memcpy(fStartTimes, source, sizeof(UDate)*size); + fNumStartTimes = size; + // Sort dates + uprv_sortArray(fStartTimes, fNumStartTimes, (int32_t)sizeof(UDate), compareDates, NULL, TRUE, &status); + if (U_FAILURE(status)) { + if (fStartTimes != NULL && fStartTimes != fLocalStartTimes) { + uprv_free(fStartTimes); + } + fNumStartTimes = 0; + return FALSE; + } + return TRUE; +} + +UDate +TimeArrayTimeZoneRule::getUTC(UDate time, int32_t raw, int32_t dst) const { + if (fTimeRuleType != DateTimeRule::UTC_TIME) { + time -= raw; + } + if (fTimeRuleType == DateTimeRule::WALL_TIME) { + time -= dst; + } + return time; +} + +U_NAMESPACE_END + +#endif /* #if !UCONFIG_NO_FORMATTING */ + +//eof + |