Check in the pristine copy of ICU 4.6...

icu46/source/i18n/tzrule.cpp

+/*
+*******************************************************************************
+* Copyright (C) 2007-2010, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*/
+
+#include <typeinfo>  // 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(void) 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
+