The Tor Browser: intl/icu/source/i18n/olsontz.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/olsontz.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/olsontz.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 **********************************************************************
 * Copyright (c) 2003-2013, International Business Machines
 * Corporation and others.  All Rights Reserved.
 **********************************************************************
 * Author: Alan Liu
 * Created: July 21 2003
 * Since: ICU 2.8
 **********************************************************************
 */
 #include "utypeinfo.h"  // for 'typeid' to work
 #include "olsontz.h"
 #if !UCONFIG_NO_FORMATTING
 #include "unicode/ures.h"
 #include "unicode/simpletz.h"
 #include "unicode/gregocal.h"
 #include "gregoimp.h"
 #include "cmemory.h"
 #include "uassert.h"
 #include "uvector.h"
 #include <float.h> // DBL_MAX
 #include "uresimp.h" // struct UResourceBundle
 #include "zonemeta.h"
 #include "umutex.h"
 #ifdef U_DEBUG_TZ
 # include <stdio.h>
 # include "uresimp.h" // for debugging
 static void debug_tz_loc(const char *f, int32_t l)
 {
   fprintf(stderr, "%s:%d: ", f, l);
 }
 static void debug_tz_msg(const char *pat, ...)
 {
   va_list ap;
   va_start(ap, pat);
   vfprintf(stderr, pat, ap);
   fflush(stderr);
 }
 // must use double parens, i.e.:  U_DEBUG_TZ_MSG(("four is: %d",4));
 #define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;}
 #else
 #define U_DEBUG_TZ_MSG(x)
 #endif
 static UBool arrayEqual(const void *a1, const void *a2, int32_t size) {
     if (a1 == NULL && a2 == NULL) {
         return TRUE;
     }
     if ((a1 != NULL && a2 == NULL) || (a1 == NULL && a2 != NULL)) {
         return FALSE;
     }
     if (a1 == a2) {
         return TRUE;
     }
     return (uprv_memcmp(a1, a2, size) == 0);
 }
 U_NAMESPACE_BEGIN
 #define kTRANS          "trans"
 #define kTRANSPRE32     "transPre32"
 #define kTRANSPOST32    "transPost32"
 #define kTYPEOFFSETS    "typeOffsets"
 #define kTYPEMAP        "typeMap"
 #define kLINKS          "links"
 #define kFINALRULE      "finalRule"
 #define kFINALRAW       "finalRaw"
 #define kFINALYEAR      "finalYear"
 #define SECONDS_PER_DAY (24*60*60)
 static const int32_t ZEROS[] = {0,0};
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(OlsonTimeZone)
 /**
  * Default constructor.  Creates a time zone with an empty ID and
  * a fixed GMT offset of zero.
  */
 /*OlsonTimeZone::OlsonTimeZone() : finalYear(INT32_MAX), finalMillis(DBL_MAX), finalZone(0), transitionRulesInitialized(FALSE) {
     clearTransitionRules();
     constructEmpty();
 }*/
 /**
  * Construct a GMT+0 zone with no transitions.  This is done when a
  * constructor fails so the resultant object is well-behaved.
  */
 void OlsonTimeZone::constructEmpty() {
     canonicalID = NULL;
     transitionCountPre32 = transitionCount32 = transitionCountPost32 = 0;
     transitionTimesPre32 = transitionTimes32 = transitionTimesPost32 = NULL;
     typeMapData = NULL;
     typeCount = 1;
     typeOffsets = ZEROS;
     finalZone = NULL;
 }
 /**
  * Construct from a resource bundle
  * @param top the top-level zoneinfo resource bundle.  This is used
  * to lookup the rule that `res' may refer to, if there is one.
  * @param res the resource bundle of the zone to be constructed
  * @param ec input-output error code
  */
 OlsonTimeZone::OlsonTimeZone(const UResourceBundle* top,
                              const UResourceBundle* res,
                              const UnicodeString& tzid,
                              UErrorCode& ec) :
   BasicTimeZone(tzid), finalZone(NULL)
 {
     clearTransitionRules();
     U_DEBUG_TZ_MSG(("OlsonTimeZone(%s)\n", ures_getKey((UResourceBundle*)res)));
     if ((top == NULL || res == NULL) && U_SUCCESS(ec)) {
         ec = U_ILLEGAL_ARGUMENT_ERROR;
     }
     if (U_SUCCESS(ec)) {
         // TODO -- clean up -- Doesn't work if res points to an alias
         //        // TODO remove nonconst casts below when ures_* API is fixed
         //        setID(ures_getKey((UResourceBundle*) res)); // cast away const
         int32_t len;
         UResourceBundle r;
         ures_initStackObject(&r);
         // Pre-32bit second transitions
         ures_getByKey(res, kTRANSPRE32, &r, &ec);
         transitionTimesPre32 = ures_getIntVector(&r, &len, &ec);
         transitionCountPre32 = len >> 1;
         if (ec == U_MISSING_RESOURCE_ERROR) {
             // No pre-32bit transitions
             transitionTimesPre32 = NULL;
             transitionCountPre32 = 0;
             ec = U_ZERO_ERROR;
         } else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF || (len & 1) != 0) /* len must be even */) {
             ec = U_INVALID_FORMAT_ERROR;
         }
         // 32bit second transitions
         ures_getByKey(res, kTRANS, &r, &ec);
         transitionTimes32 = ures_getIntVector(&r, &len, &ec);
         transitionCount32 = len;
         if (ec == U_MISSING_RESOURCE_ERROR) {
             // No 32bit transitions
             transitionTimes32 = NULL;
             transitionCount32 = 0;
             ec = U_ZERO_ERROR;
         } else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF)) {
             ec = U_INVALID_FORMAT_ERROR;
         }
         // Post-32bit second transitions
         ures_getByKey(res, kTRANSPOST32, &r, &ec);
         transitionTimesPost32 = ures_getIntVector(&r, &len, &ec);
         transitionCountPost32 = len >> 1;
         if (ec == U_MISSING_RESOURCE_ERROR) {
             // No pre-32bit transitions
             transitionTimesPost32 = NULL;
             transitionCountPost32 = 0;
             ec = U_ZERO_ERROR;
         } else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF || (len & 1) != 0) /* len must be even */) {
             ec = U_INVALID_FORMAT_ERROR;
         }
         // Type offsets list must be of even size, with size >= 2
         ures_getByKey(res, kTYPEOFFSETS, &r, &ec);
         typeOffsets = ures_getIntVector(&r, &len, &ec);
         if (U_SUCCESS(ec) && (len < 2 || len > 0x7FFE || (len & 1) != 0)) {
             ec = U_INVALID_FORMAT_ERROR;
         }
         typeCount = (int16_t) len >> 1;
         // Type map data must be of the same size as the transition count
         typeMapData =  NULL;
         if (transitionCount() > 0) {
             ures_getByKey(res, kTYPEMAP, &r, &ec);
             typeMapData = ures_getBinary(&r, &len, &ec);
             if (ec == U_MISSING_RESOURCE_ERROR) {
                 // no type mapping data
                 ec = U_INVALID_FORMAT_ERROR;
             } else if (U_SUCCESS(ec) && len != transitionCount()) {
                 ec = U_INVALID_FORMAT_ERROR;
             }
         }
         // Process final rule and data, if any
         const UChar *ruleIdUStr = ures_getStringByKey(res, kFINALRULE, &len, &ec);
         ures_getByKey(res, kFINALRAW, &r, &ec);
         int32_t ruleRaw = ures_getInt(&r, &ec);
         ures_getByKey(res, kFINALYEAR, &r, &ec);
         int32_t ruleYear = ures_getInt(&r, &ec);
         if (U_SUCCESS(ec)) {
             UnicodeString ruleID(TRUE, ruleIdUStr, len);
             UResourceBundle *rule = TimeZone::loadRule(top, ruleID, NULL, ec);
             const int32_t *ruleData = ures_getIntVector(rule, &len, &ec);
             if (U_SUCCESS(ec) && len == 11) {
                 UnicodeString emptyStr;
                 finalZone = new SimpleTimeZone(
                     ruleRaw * U_MILLIS_PER_SECOND,
                     emptyStr,
                     (int8_t)ruleData[0], (int8_t)ruleData[1], (int8_t)ruleData[2],
                     ruleData[3] * U_MILLIS_PER_SECOND,
                     (SimpleTimeZone::TimeMode) ruleData[4],
                     (int8_t)ruleData[5], (int8_t)ruleData[6], (int8_t)ruleData[7],
                     ruleData[8] * U_MILLIS_PER_SECOND,
                     (SimpleTimeZone::TimeMode) ruleData[9],
                     ruleData[10] * U_MILLIS_PER_SECOND, ec);
                 if (finalZone == NULL) {
                     ec = U_MEMORY_ALLOCATION_ERROR;
                 } else {
                     finalStartYear = ruleYear;
                     // Note: Setting finalStartYear to the finalZone is problematic.  When a date is around
                     // year boundary, SimpleTimeZone may return false result when DST is observed at the
                     // beginning of year.  We could apply safe margin (day or two), but when one of recurrent
                     // rules falls around year boundary, it could return false result.  Without setting the
                     // start year, finalZone works fine around the year boundary of the start year.
                     // finalZone->setStartYear(finalStartYear);
                     // Compute the millis for Jan 1, 0:00 GMT of the finalYear
                     // Note: finalStartMillis is used for detecting either if
                     // historic transition data or finalZone to be used.  In an
                     // extreme edge case - for example, two transitions fall into
                     // small windows of time around the year boundary, this may
                     // result incorrect offset computation.  But I think it will
                     // never happen practically.  Yoshito - Feb 20, 2010
                     finalStartMillis = Grego::fieldsToDay(finalStartYear, 0, 1) * U_MILLIS_PER_DAY;
                 }
             } else {
                 ec = U_INVALID_FORMAT_ERROR;
             }
             ures_close(rule);
         } else if (ec == U_MISSING_RESOURCE_ERROR) {
             // No final zone
             ec = U_ZERO_ERROR;
         }
         ures_close(&r);
         // initialize canonical ID
         canonicalID = ZoneMeta::getCanonicalCLDRID(tzid, ec);
     }
     if (U_FAILURE(ec)) {
         constructEmpty();
     }
 }
 /**
  * Copy constructor
  */
 OlsonTimeZone::OlsonTimeZone(const OlsonTimeZone& other) :
     BasicTimeZone(other), finalZone(0) {
     *this = other;
 }
 /**
  * Assignment operator
  */
 OlsonTimeZone& OlsonTimeZone::operator=(const OlsonTimeZone& other) {
     canonicalID = other.canonicalID;
     transitionTimesPre32 = other.transitionTimesPre32;
     transitionTimes32 = other.transitionTimes32;
     transitionTimesPost32 = other.transitionTimesPost32;
     transitionCountPre32 = other.transitionCountPre32;
     transitionCount32 = other.transitionCount32;
     transitionCountPost32 = other.transitionCountPost32;
     typeCount = other.typeCount;
     typeOffsets = other.typeOffsets;
     typeMapData = other.typeMapData;
     delete finalZone;
     finalZone = (other.finalZone != 0) ?
         (SimpleTimeZone*) other.finalZone->clone() : 0;
     finalStartYear = other.finalStartYear;
     finalStartMillis = other.finalStartMillis;
     clearTransitionRules();
     return *this;
 }
 /**
  * Destructor
  */
 OlsonTimeZone::~OlsonTimeZone() {
     deleteTransitionRules();
     delete finalZone;
 }
 /**
  * Returns true if the two TimeZone objects are equal.
  */
 UBool OlsonTimeZone::operator==(const TimeZone& other) const {
     return ((this == &other) ||
             (typeid(*this) == typeid(other) &&
             TimeZone::operator==(other) &&
             hasSameRules(other)));
 }
 /**
  * TimeZone API.
  */
 TimeZone* OlsonTimeZone::clone() const {
     return new OlsonTimeZone(*this);
 }
 /**
  * TimeZone API.
  */
 int32_t OlsonTimeZone::getOffset(uint8_t era, int32_t year, int32_t month,
                                  int32_t dom, uint8_t dow,
                                  int32_t millis, UErrorCode& ec) const {
     if (month < UCAL_JANUARY || month > UCAL_DECEMBER) {
         if (U_SUCCESS(ec)) {
             ec = U_ILLEGAL_ARGUMENT_ERROR;
         }
         return 0;
     } else {
         return getOffset(era, year, month, dom, dow, millis,
                          Grego::monthLength(year, month),
                          ec);
     }
 }
 /**
  * TimeZone API.
  */
 int32_t OlsonTimeZone::getOffset(uint8_t era, int32_t year, int32_t month,
                                  int32_t dom, uint8_t dow,
                                  int32_t millis, int32_t monthLength,
                                  UErrorCode& ec) const {
     if (U_FAILURE(ec)) {
         return 0;
     }
     if ((era != GregorianCalendar::AD && era != GregorianCalendar::BC)
         || month < UCAL_JANUARY
         || month > UCAL_DECEMBER
         || dom < 1
         || dom > monthLength
         || dow < UCAL_SUNDAY
         || dow > UCAL_SATURDAY
         || millis < 0
         || millis >= U_MILLIS_PER_DAY
         || monthLength < 28
         || monthLength > 31) {
         ec = U_ILLEGAL_ARGUMENT_ERROR;
         return 0;
     }
     if (era == GregorianCalendar::BC) {
         year = -year;
     }
     if (finalZone != NULL && year >= finalStartYear) {
         return finalZone->getOffset(era, year, month, dom, dow,
                                     millis, monthLength, ec);
     }
     // Compute local epoch millis from input fields
     UDate date = (UDate)(Grego::fieldsToDay(year, month, dom) * U_MILLIS_PER_DAY + millis);
     int32_t rawoff, dstoff;
     getHistoricalOffset(date, TRUE, kDaylight, kStandard, rawoff, dstoff);
     return rawoff + dstoff;
 }
 /**
  * TimeZone API.
  */
 void OlsonTimeZone::getOffset(UDate date, UBool local, int32_t& rawoff,
                               int32_t& dstoff, UErrorCode& ec) const {
     if (U_FAILURE(ec)) {
         return;
     }
     if (finalZone != NULL && date >= finalStartMillis) {
         finalZone->getOffset(date, local, rawoff, dstoff, ec);
     } else {
         getHistoricalOffset(date, local, kFormer, kLatter, rawoff, dstoff);
     }
 }
 void
 OlsonTimeZone::getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt,
                                   int32_t& rawoff, int32_t& dstoff, UErrorCode& ec) const {
     if (U_FAILURE(ec)) {
         return;
     }
     if (finalZone != NULL && date >= finalStartMillis) {
         finalZone->getOffsetFromLocal(date, nonExistingTimeOpt, duplicatedTimeOpt, rawoff, dstoff, ec);
     } else {
         getHistoricalOffset(date, TRUE, nonExistingTimeOpt, duplicatedTimeOpt, rawoff, dstoff);
     }
 }
 /**
  * TimeZone API.
  */
 void OlsonTimeZone::setRawOffset(int32_t /*offsetMillis*/) {
     // We don't support this operation, since OlsonTimeZones are
     // immutable (except for the ID, which is in the base class).
     // Nothing to do!
 }
 /**
  * TimeZone API.
  */
 int32_t OlsonTimeZone::getRawOffset() const {
     UErrorCode ec = U_ZERO_ERROR;
     int32_t raw, dst;
     getOffset((double) uprv_getUTCtime() * U_MILLIS_PER_SECOND,
               FALSE, raw, dst, ec);
     return raw;
 }
 #if defined U_DEBUG_TZ
 void printTime(double ms) {
             int32_t year, month, dom, dow;
             double millis=0;
             double days = ClockMath::floorDivide(((double)ms), (double)U_MILLIS_PER_DAY, millis);
             Grego::dayToFields(days, year, month, dom, dow);
             U_DEBUG_TZ_MSG(("   getHistoricalOffset:  time %.1f (%04d.%02d.%02d+%.1fh)\n", ms,
                             year, month+1, dom, (millis/kOneHour)));
     }
 #endif
 int64_t
 OlsonTimeZone::transitionTimeInSeconds(int16_t transIdx) const {
     U_ASSERT(transIdx >= 0 && transIdx < transitionCount());
     if (transIdx < transitionCountPre32) {
         return (((int64_t)((uint32_t)transitionTimesPre32[transIdx << 1])) << 32)
             | ((int64_t)((uint32_t)transitionTimesPre32[(transIdx << 1) + 1]));
     }
     transIdx -= transitionCountPre32;
     if (transIdx < transitionCount32) {
         return (int64_t)transitionTimes32[transIdx];
     }
     transIdx -= transitionCount32;
     return (((int64_t)((uint32_t)transitionTimesPost32[transIdx << 1])) << 32)
         | ((int64_t)((uint32_t)transitionTimesPost32[(transIdx << 1) + 1]));
 }
 // Maximum absolute offset in seconds (86400 seconds = 1 day)
 // getHistoricalOffset uses this constant as safety margin of
 // quick zone transition checking.
 #define MAX_OFFSET_SECONDS 86400
 void
 OlsonTimeZone::getHistoricalOffset(UDate date, UBool local,
                                    int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt,
                                    int32_t& rawoff, int32_t& dstoff) const {
     U_DEBUG_TZ_MSG(("getHistoricalOffset(%.1f, %s, %d, %d, raw, dst)\n",
         date, local?"T":"F", NonExistingTimeOpt, DuplicatedTimeOpt));
 #if defined U_DEBUG_TZ
         printTime(date*1000.0);
 #endif
     int16_t transCount = transitionCount();
     if (transCount > 0) {
         double sec = uprv_floor(date / U_MILLIS_PER_SECOND);
         if (!local && sec < transitionTimeInSeconds(0)) {
             // Before the first transition time
             rawoff = initialRawOffset() * U_MILLIS_PER_SECOND;
             dstoff = initialDstOffset() * U_MILLIS_PER_SECOND;
         } else {
             // Linear search from the end is the fastest approach, since
             // most lookups will happen at/near the end.
             int16_t transIdx;
             for (transIdx = transCount - 1; transIdx >= 0; transIdx--) {
                 int64_t transition = transitionTimeInSeconds(transIdx);
                 if (local && (sec >= (transition - MAX_OFFSET_SECONDS))) {
                     int32_t offsetBefore = zoneOffsetAt(transIdx - 1);
                     UBool dstBefore = dstOffsetAt(transIdx - 1) != 0;
                     int32_t offsetAfter = zoneOffsetAt(transIdx);
                     UBool dstAfter = dstOffsetAt(transIdx) != 0;
                     UBool dstToStd = dstBefore && !dstAfter;
                     UBool stdToDst = !dstBefore && dstAfter;
                     if (offsetAfter - offsetBefore >= 0) {
                         // Positive transition, which makes a non-existing local time range
                         if (((NonExistingTimeOpt & kStdDstMask) == kStandard && dstToStd)
                                 || ((NonExistingTimeOpt & kStdDstMask) == kDaylight && stdToDst)) {
                             transition += offsetBefore;
                         } else if (((NonExistingTimeOpt & kStdDstMask) == kStandard && stdToDst)
                                 || ((NonExistingTimeOpt & kStdDstMask) == kDaylight && dstToStd)) {
                             transition += offsetAfter;
                         } else if ((NonExistingTimeOpt & kFormerLatterMask) == kLatter) {
                             transition += offsetBefore;
                         } else {
                             // Interprets the time with rule before the transition,
                             // default for non-existing time range
                             transition += offsetAfter;
                         }
                     } else {
                         // Negative transition, which makes a duplicated local time range
                         if (((DuplicatedTimeOpt & kStdDstMask) == kStandard && dstToStd)
                                 || ((DuplicatedTimeOpt & kStdDstMask) == kDaylight && stdToDst)) {
                             transition += offsetAfter;
                         } else if (((DuplicatedTimeOpt & kStdDstMask) == kStandard && stdToDst)
                                 || ((DuplicatedTimeOpt & kStdDstMask) == kDaylight && dstToStd)) {
                             transition += offsetBefore;
                         } else if ((DuplicatedTimeOpt & kFormerLatterMask) == kFormer) {
                             transition += offsetBefore;
                         } else {
                             // Interprets the time with rule after the transition,
                             // default for duplicated local time range
                             transition += offsetAfter;
                         }
                     }
                 }
                 if (sec >= transition) {
                     break;
                 }
             }
             // transIdx could be -1 when local=true
             rawoff = rawOffsetAt(transIdx) * U_MILLIS_PER_SECOND;
             dstoff = dstOffsetAt(transIdx) * U_MILLIS_PER_SECOND;
         }
     } else {
         // No transitions, single pair of offsets only
         rawoff = initialRawOffset() * U_MILLIS_PER_SECOND;
         dstoff = initialDstOffset() * U_MILLIS_PER_SECOND;
     }
     U_DEBUG_TZ_MSG(("getHistoricalOffset(%.1f, %s, %d, %d, raw, dst) - raw=%d, dst=%d\n",
         date, local?"T":"F", NonExistingTimeOpt, DuplicatedTimeOpt, rawoff, dstoff));
 }
 /**
  * TimeZone API.
  */
 UBool OlsonTimeZone::useDaylightTime() const {
     // If DST was observed in 1942 (for example) but has never been
     // observed from 1943 to the present, most clients will expect
     // this method to return FALSE.  This method determines whether
     // DST is in use in the current year (at any point in the year)
     // and returns TRUE if so.
     UDate current = uprv_getUTCtime();
     if (finalZone != NULL && current >= finalStartMillis) {
         return finalZone->useDaylightTime();
     }
     int32_t year, month, dom, dow, doy, mid;
     Grego::timeToFields(current, year, month, dom, dow, doy, mid);
     // Find start of this year, and start of next year
     double start = Grego::fieldsToDay(year, 0, 1) * SECONDS_PER_DAY;
     double limit = Grego::fieldsToDay(year+1, 0, 1) * SECONDS_PER_DAY;
     // Return TRUE if DST is observed at any time during the current
     // year.
     for (int16_t i = 0; i < transitionCount(); ++i) {
         double transition = (double)transitionTimeInSeconds(i);
         if (transition >= limit) {
             break;
         }
         if ((transition >= start && dstOffsetAt(i) != 0)
                 || (transition > start && dstOffsetAt(i - 1) != 0)) {
             return TRUE;
         }
     }
     return FALSE;
 }
 int32_t
 OlsonTimeZone::getDSTSavings() const{
     if (finalZone != NULL){
         return finalZone->getDSTSavings();
     }
     return TimeZone::getDSTSavings();
 }
 /**
  * TimeZone API.
  */
 UBool OlsonTimeZone::inDaylightTime(UDate date, UErrorCode& ec) const {
     int32_t raw, dst;
     getOffset(date, FALSE, raw, dst, ec);
     return dst != 0;
 }
 UBool
 OlsonTimeZone::hasSameRules(const TimeZone &other) const {
     if (this == &other) {
         return TRUE;
     }
     const OlsonTimeZone* z = dynamic_cast<const OlsonTimeZone*>(&other);
     if (z == NULL) {
         return FALSE;
     }
     // [sic] pointer comparison: typeMapData points into
     // memory-mapped or DLL space, so if two zones have the same
     // pointer, they are equal.
     if (typeMapData == z->typeMapData) {
         return TRUE;
     }
     // If the pointers are not equal, the zones may still
     // be equal if their rules and transitions are equal
     if ((finalZone == NULL && z->finalZone != NULL)
         || (finalZone != NULL && z->finalZone == NULL)
         || (finalZone != NULL && z->finalZone != NULL && *finalZone != *z->finalZone)) {
         return FALSE;
     }
     if (finalZone != NULL) {
         if (finalStartYear != z->finalStartYear || finalStartMillis != z->finalStartMillis) {
             return FALSE;
         }
     }
     if (typeCount != z->typeCount
         || transitionCountPre32 != z->transitionCountPre32
         || transitionCount32 != z->transitionCount32
         || transitionCountPost32 != z->transitionCountPost32) {
         return FALSE;
     }
     return
         arrayEqual(transitionTimesPre32, z->transitionTimesPre32, sizeof(transitionTimesPre32[0]) * transitionCountPre32 << 1)
         && arrayEqual(transitionTimes32, z->transitionTimes32, sizeof(transitionTimes32[0]) * transitionCount32)
         && arrayEqual(transitionTimesPost32, z->transitionTimesPost32, sizeof(transitionTimesPost32[0]) * transitionCountPost32 << 1)
         && arrayEqual(typeOffsets, z->typeOffsets, sizeof(typeOffsets[0]) * typeCount << 1)
         && arrayEqual(typeMapData, z->typeMapData, sizeof(typeMapData[0]) * transitionCount());
 }
 void
 OlsonTimeZone::clearTransitionRules(void) {
     initialRule = NULL;
     firstTZTransition = NULL;
     firstFinalTZTransition = NULL;
     historicRules = NULL;
     historicRuleCount = 0;
     finalZoneWithStartYear = NULL;
     firstTZTransitionIdx = 0;
     transitionRulesInitOnce.reset();
 }
 void
 OlsonTimeZone::deleteTransitionRules(void) {
     if (initialRule != NULL) {
         delete initialRule;
     }
     if (firstTZTransition != NULL) {
         delete firstTZTransition;
     }
     if (firstFinalTZTransition != NULL) {
         delete firstFinalTZTransition;
     }
     if (finalZoneWithStartYear != NULL) {
         delete finalZoneWithStartYear;
     }
     if (historicRules != NULL) {
         for (int i = 0; i < historicRuleCount; i++) {
             if (historicRules[i] != NULL) {
                 delete historicRules[i];
             }
         }
         uprv_free(historicRules);
     }
     clearTransitionRules();
 }
 /*
  * Lazy transition rules initializer
  */
 static void U_CALLCONV initRules(OlsonTimeZone *This, UErrorCode &status) {
     This->initTransitionRules(status);
 }
 void
 OlsonTimeZone::checkTransitionRules(UErrorCode& status) const {
     OlsonTimeZone *ncThis = const_cast<OlsonTimeZone *>(this);
     umtx_initOnce(ncThis->transitionRulesInitOnce, &initRules, ncThis, status);
 }
 void
 OlsonTimeZone::initTransitionRules(UErrorCode& status) {
     if(U_FAILURE(status)) {
         return;
     }
     deleteTransitionRules();
     UnicodeString tzid;
     getID(tzid);
     UnicodeString stdName = tzid + UNICODE_STRING_SIMPLE("(STD)");
     UnicodeString dstName = tzid + UNICODE_STRING_SIMPLE("(DST)");
     int32_t raw, dst;
     // Create initial rule
     raw = initialRawOffset() * U_MILLIS_PER_SECOND;
     dst = initialDstOffset() * U_MILLIS_PER_SECOND;
     initialRule = new InitialTimeZoneRule((dst == 0 ? stdName : dstName), raw, dst);
     // Check to make sure initialRule was created
     if (initialRule == NULL) {
         status = U_MEMORY_ALLOCATION_ERROR;
         deleteTransitionRules();
         return;
     }
     int32_t transCount = transitionCount();
     if (transCount > 0) {
         int16_t transitionIdx, typeIdx;
         // We probably no longer need to check the first "real" transition
         // here, because the new tzcode remove such transitions already.
         // For now, keeping this code for just in case. Feb 19, 2010 Yoshito
         firstTZTransitionIdx = 0;
         for (transitionIdx = 0; transitionIdx < transCount; transitionIdx++) {
             if (typeMapData[transitionIdx] != 0) { // type 0 is the initial type
                 break;
             }
             firstTZTransitionIdx++;
         }
         if (transitionIdx == transCount) {
             // Actually no transitions...
         } else {
             // Build historic rule array
             UDate* times = (UDate*)uprv_malloc(sizeof(UDate)*transCount); /* large enough to store all transition times */
             if (times == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 deleteTransitionRules();
                 return;
             }
             for (typeIdx = 0; typeIdx < typeCount; typeIdx++) {
                 // Gather all start times for each pair of offsets
                 int32_t nTimes = 0;
                 for (transitionIdx = firstTZTransitionIdx; transitionIdx < transCount; transitionIdx++) {
                     if (typeIdx == (int16_t)typeMapData[transitionIdx]) {
                         UDate tt = (UDate)transitionTime(transitionIdx);
                         if (finalZone == NULL || tt <= finalStartMillis) {
                             // Exclude transitions after finalMillis
                             times[nTimes++] = tt;
                         }
                     }
                 }
                 if (nTimes > 0) {
                     // Create a TimeArrayTimeZoneRule
                     raw = typeOffsets[typeIdx << 1] * U_MILLIS_PER_SECOND;
                     dst = typeOffsets[(typeIdx << 1) + 1] * U_MILLIS_PER_SECOND;
                     if (historicRules == NULL) {
                         historicRuleCount = typeCount;
                         historicRules = (TimeArrayTimeZoneRule**)uprv_malloc(sizeof(TimeArrayTimeZoneRule*)*historicRuleCount);
                         if (historicRules == NULL) {
                             status = U_MEMORY_ALLOCATION_ERROR;
                             deleteTransitionRules();
                             uprv_free(times);
                             return;
                         }
                         for (int i = 0; i < historicRuleCount; i++) {
                             // Initialize TimeArrayTimeZoneRule pointers as NULL
                             historicRules[i] = NULL;
                         }
                     }
                     historicRules[typeIdx] = new TimeArrayTimeZoneRule((dst == 0 ? stdName : dstName),
                         raw, dst, times, nTimes, DateTimeRule::UTC_TIME);
                     // Check for memory allocation error
                     if (historicRules[typeIdx] == NULL) {
                         status = U_MEMORY_ALLOCATION_ERROR;
                         deleteTransitionRules();
                         return;
                     }
                 }
             }
             uprv_free(times);
             // Create initial transition
             typeIdx = (int16_t)typeMapData[firstTZTransitionIdx];
             firstTZTransition = new TimeZoneTransition((UDate)transitionTime(firstTZTransitionIdx),
                     *initialRule, *historicRules[typeIdx]);
             // Check to make sure firstTZTransition was created.
             if (firstTZTransition == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 deleteTransitionRules();
                 return;
             }
         }
     }
     if (finalZone != NULL) {
         // Get the first occurence of final rule starts
         UDate startTime = (UDate)finalStartMillis;
         TimeZoneRule *firstFinalRule = NULL;
         if (finalZone->useDaylightTime()) {
             /*
              * Note: When an OlsonTimeZone is constructed, we should set the final year
              * as the start year of finalZone.  However, the bounday condition used for
              * getting offset from finalZone has some problems.
              * For now, we do not set the valid start year when the construction time
              * and create a clone and set the start year when extracting rules.
              */
             finalZoneWithStartYear = (SimpleTimeZone*)finalZone->clone();
             // Check to make sure finalZone was actually cloned.
             if (finalZoneWithStartYear == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 deleteTransitionRules();
                 return;
             }
             finalZoneWithStartYear->setStartYear(finalStartYear);
             TimeZoneTransition tzt;
             finalZoneWithStartYear->getNextTransition(startTime, false, tzt);
             firstFinalRule  = tzt.getTo()->clone();
             // Check to make sure firstFinalRule received proper clone.
             if (firstFinalRule == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 deleteTransitionRules();
                 return;
             }
             startTime = tzt.getTime();
         } else {
             // final rule with no transitions
             finalZoneWithStartYear = (SimpleTimeZone*)finalZone->clone();
             // Check to make sure finalZone was actually cloned.
             if (finalZoneWithStartYear == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 deleteTransitionRules();
                 return;
             }
             finalZone->getID(tzid);
             firstFinalRule = new TimeArrayTimeZoneRule(tzid,
                 finalZone->getRawOffset(), 0, &startTime, 1, DateTimeRule::UTC_TIME);
             // Check firstFinalRule was properly created.
             if (firstFinalRule == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 deleteTransitionRules();
                 return;
             }
         }
         TimeZoneRule *prevRule = NULL;
         if (transCount > 0) {
             prevRule = historicRules[typeMapData[transCount - 1]];
         }
         if (prevRule == NULL) {
             // No historic transitions, but only finalZone available
             prevRule = initialRule;
         }
         firstFinalTZTransition = new TimeZoneTransition();
         // Check to make sure firstFinalTZTransition was created before dereferencing
         if (firstFinalTZTransition == NULL) {
             status = U_MEMORY_ALLOCATION_ERROR;
             deleteTransitionRules();
             return;
         }
         firstFinalTZTransition->setTime(startTime);
         firstFinalTZTransition->adoptFrom(prevRule->clone());
         firstFinalTZTransition->adoptTo(firstFinalRule);
     }
 }
 UBool
 OlsonTimeZone::getNextTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const {
     UErrorCode status = U_ZERO_ERROR;
     checkTransitionRules(status);
     if (U_FAILURE(status)) {
         return FALSE;
     }
     if (finalZone != NULL) {
         if (inclusive && base == firstFinalTZTransition->getTime()) {
             result = *firstFinalTZTransition;
             return TRUE;
         } else if (base >= firstFinalTZTransition->getTime()) {
             if (finalZone->useDaylightTime()) {
                 //return finalZone->getNextTransition(base, inclusive, result);
                 return finalZoneWithStartYear->getNextTransition(base, inclusive, result);
             } else {
                 // No more transitions
                 return FALSE;
             }
         }
     }
     if (historicRules != NULL) {
         // Find a historical transition
         int16_t transCount = transitionCount();
         int16_t ttidx = transCount - 1;
         for (; ttidx >= firstTZTransitionIdx; ttidx--) {
             UDate t = (UDate)transitionTime(ttidx);
             if (base > t || (!inclusive && base == t)) {
                 break;
             }
         }
         if (ttidx == transCount - 1)  {
             if (firstFinalTZTransition != NULL) {
                 result = *firstFinalTZTransition;
                 return TRUE;
             } else {
                 return FALSE;
             }
         } else if (ttidx < firstTZTransitionIdx) {
             result = *firstTZTransition;
             return TRUE;
         } else {
             // Create a TimeZoneTransition
             TimeZoneRule *to = historicRules[typeMapData[ttidx + 1]];
             TimeZoneRule *from = historicRules[typeMapData[ttidx]];
             UDate startTime = (UDate)transitionTime(ttidx+1);
             // The transitions loaded from zoneinfo.res may contain non-transition data
             UnicodeString fromName, toName;
             from->getName(fromName);
             to->getName(toName);
             if (fromName == toName && from->getRawOffset() == to->getRawOffset()
                     && from->getDSTSavings() == to->getDSTSavings()) {
                 return getNextTransition(startTime, false, result);
             }
             result.setTime(startTime);
             result.adoptFrom(from->clone());
             result.adoptTo(to->clone());
             return TRUE;
         }
     }
     return FALSE;
 }
 UBool
 OlsonTimeZone::getPreviousTransition(UDate base, UBool inclusive, TimeZoneTransition& result) const {
     UErrorCode status = U_ZERO_ERROR;
     checkTransitionRules(status);
     if (U_FAILURE(status)) {
         return FALSE;
     }
     if (finalZone != NULL) {
         if (inclusive && base == firstFinalTZTransition->getTime()) {
             result = *firstFinalTZTransition;
             return TRUE;
         } else if (base > firstFinalTZTransition->getTime()) {
             if (finalZone->useDaylightTime()) {
                 //return finalZone->getPreviousTransition(base, inclusive, result);
                 return finalZoneWithStartYear->getPreviousTransition(base, inclusive, result);
             } else {
                 result = *firstFinalTZTransition;
                 return TRUE;
             }
         }
     }
     if (historicRules != NULL) {
         // Find a historical transition
         int16_t ttidx = transitionCount() - 1;
         for (; ttidx >= firstTZTransitionIdx; ttidx--) {
             UDate t = (UDate)transitionTime(ttidx);
             if (base > t || (inclusive && base == t)) {
                 break;
             }
         }
         if (ttidx < firstTZTransitionIdx) {
             // No more transitions
             return FALSE;
         } else if (ttidx == firstTZTransitionIdx) {
             result = *firstTZTransition;
             return TRUE;
         } else {
             // Create a TimeZoneTransition
             TimeZoneRule *to = historicRules[typeMapData[ttidx]];
             TimeZoneRule *from = historicRules[typeMapData[ttidx-1]];
             UDate startTime = (UDate)transitionTime(ttidx);
             // The transitions loaded from zoneinfo.res may contain non-transition data
             UnicodeString fromName, toName;
             from->getName(fromName);
             to->getName(toName);
             if (fromName == toName && from->getRawOffset() == to->getRawOffset()
                     && from->getDSTSavings() == to->getDSTSavings()) {
                 return getPreviousTransition(startTime, false, result);
             }
             result.setTime(startTime);
             result.adoptFrom(from->clone());
             result.adoptTo(to->clone());
             return TRUE;
         }
     }
     return FALSE;
 }
 int32_t
 OlsonTimeZone::countTransitionRules(UErrorCode& status) const {
     if (U_FAILURE(status)) {
         return 0;
     }
     checkTransitionRules(status);
     if (U_FAILURE(status)) {
         return 0;
     }
     int32_t count = 0;
     if (historicRules != NULL) {
         // historicRules may contain null entries when original zoneinfo data
         // includes non transition data.
         for (int32_t i = 0; i < historicRuleCount; i++) {
             if (historicRules[i] != NULL) {
                 count++;
             }
         }
     }
     if (finalZone != NULL) {
         if (finalZone->useDaylightTime()) {
             count += 2;
         } else {
             count++;
         }
     }
     return count;
 }
 void
 OlsonTimeZone::getTimeZoneRules(const InitialTimeZoneRule*& initial,
                                 const TimeZoneRule* trsrules[],
                                 int32_t& trscount,
                                 UErrorCode& status) const {
     if (U_FAILURE(status)) {
         return;
     }
     checkTransitionRules(status);
     if (U_FAILURE(status)) {
         return;
     }
     // Initial rule
     initial = initialRule;
     // Transition rules
     int32_t cnt = 0;
     if (historicRules != NULL && trscount > cnt) {
         // historicRules may contain null entries when original zoneinfo data
         // includes non transition data.
         for (int32_t i = 0; i < historicRuleCount; i++) {
             if (historicRules[i] != NULL) {
                 trsrules[cnt++] = historicRules[i];
                 if (cnt >= trscount) {
                     break;
                 }
             }
         }
     }
     if (finalZoneWithStartYear != NULL && trscount > cnt) {
         const InitialTimeZoneRule *tmpini;
         int32_t tmpcnt = trscount - cnt;
         finalZoneWithStartYear->getTimeZoneRules(tmpini, &trsrules[cnt], tmpcnt, status);
         if (U_FAILURE(status)) {
             return;
         }
         cnt += tmpcnt;
     }
     // Set the result length
     trscount = cnt;
 }
 U_NAMESPACE_END
 #endif // !UCONFIG_NO_FORMATTING
 //eof

The Tor Browser / annotate

intl/icu/source/i18n/olsontz.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/olsontz.cpp