1089 lines
38 KiB
C++
1089 lines
38 KiB
C++
/*
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**********************************************************************
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* Copyright (c) 2003-2013, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Author: Alan Liu
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* Created: July 21 2003
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* Since: ICU 2.8
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**********************************************************************
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*/
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#include "utypeinfo.h" // for 'typeid' to work
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#include "olsontz.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/ures.h"
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#include "unicode/simpletz.h"
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#include "unicode/gregocal.h"
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#include "gregoimp.h"
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#include "cmemory.h"
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#include "uassert.h"
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#include "uvector.h"
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#include <float.h> // DBL_MAX
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#include "uresimp.h" // struct UResourceBundle
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#include "zonemeta.h"
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#include "umutex.h"
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#ifdef U_DEBUG_TZ
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# include <stdio.h>
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# include "uresimp.h" // for debugging
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static void debug_tz_loc(const char *f, int32_t l)
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{
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fprintf(stderr, "%s:%d: ", f, l);
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}
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static void debug_tz_msg(const char *pat, ...)
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{
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va_list ap;
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va_start(ap, pat);
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vfprintf(stderr, pat, ap);
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fflush(stderr);
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}
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// must use double parens, i.e.: U_DEBUG_TZ_MSG(("four is: %d",4));
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#define U_DEBUG_TZ_MSG(x) {debug_tz_loc(__FILE__,__LINE__);debug_tz_msg x;}
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#else
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#define U_DEBUG_TZ_MSG(x)
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#endif
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static UBool arrayEqual(const void *a1, const void *a2, int32_t size) {
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if (a1 == NULL && a2 == NULL) {
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return TRUE;
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}
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if ((a1 != NULL && a2 == NULL) || (a1 == NULL && a2 != NULL)) {
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return FALSE;
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}
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if (a1 == a2) {
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return TRUE;
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}
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return (uprv_memcmp(a1, a2, size) == 0);
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}
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U_NAMESPACE_BEGIN
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#define kTRANS "trans"
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#define kTRANSPRE32 "transPre32"
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#define kTRANSPOST32 "transPost32"
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#define kTYPEOFFSETS "typeOffsets"
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#define kTYPEMAP "typeMap"
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#define kLINKS "links"
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#define kFINALRULE "finalRule"
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#define kFINALRAW "finalRaw"
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#define kFINALYEAR "finalYear"
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#define SECONDS_PER_DAY (24*60*60)
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static const int32_t ZEROS[] = {0,0};
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(OlsonTimeZone)
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/**
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* Default constructor. Creates a time zone with an empty ID and
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* a fixed GMT offset of zero.
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*/
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/*OlsonTimeZone::OlsonTimeZone() : finalYear(INT32_MAX), finalMillis(DBL_MAX), finalZone(0), transitionRulesInitialized(FALSE) {
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clearTransitionRules();
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constructEmpty();
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}*/
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/**
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* Construct a GMT+0 zone with no transitions. This is done when a
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* constructor fails so the resultant object is well-behaved.
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*/
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void OlsonTimeZone::constructEmpty() {
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canonicalID = NULL;
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transitionCountPre32 = transitionCount32 = transitionCountPost32 = 0;
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transitionTimesPre32 = transitionTimes32 = transitionTimesPost32 = NULL;
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typeMapData = NULL;
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typeCount = 1;
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typeOffsets = ZEROS;
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finalZone = NULL;
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}
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/**
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* Construct from a resource bundle
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* @param top the top-level zoneinfo resource bundle. This is used
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* to lookup the rule that `res' may refer to, if there is one.
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* @param res the resource bundle of the zone to be constructed
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* @param ec input-output error code
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*/
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OlsonTimeZone::OlsonTimeZone(const UResourceBundle* top,
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const UResourceBundle* res,
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const UnicodeString& tzid,
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UErrorCode& ec) :
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BasicTimeZone(tzid), finalZone(NULL), transitionRulesInitialized(FALSE)
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{
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clearTransitionRules();
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U_DEBUG_TZ_MSG(("OlsonTimeZone(%s)\n", ures_getKey((UResourceBundle*)res)));
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if ((top == NULL || res == NULL) && U_SUCCESS(ec)) {
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ec = U_ILLEGAL_ARGUMENT_ERROR;
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}
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if (U_SUCCESS(ec)) {
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// TODO -- clean up -- Doesn't work if res points to an alias
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// // TODO remove nonconst casts below when ures_* API is fixed
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// setID(ures_getKey((UResourceBundle*) res)); // cast away const
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int32_t len;
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UResourceBundle r;
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ures_initStackObject(&r);
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// Pre-32bit second transitions
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ures_getByKey(res, kTRANSPRE32, &r, &ec);
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transitionTimesPre32 = ures_getIntVector(&r, &len, &ec);
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transitionCountPre32 = len >> 1;
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if (ec == U_MISSING_RESOURCE_ERROR) {
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// No pre-32bit transitions
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transitionTimesPre32 = NULL;
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transitionCountPre32 = 0;
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ec = U_ZERO_ERROR;
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} else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF || (len & 1) != 0) /* len must be even */) {
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ec = U_INVALID_FORMAT_ERROR;
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}
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// 32bit second transitions
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ures_getByKey(res, kTRANS, &r, &ec);
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transitionTimes32 = ures_getIntVector(&r, &len, &ec);
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transitionCount32 = len;
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if (ec == U_MISSING_RESOURCE_ERROR) {
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// No 32bit transitions
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transitionTimes32 = NULL;
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transitionCount32 = 0;
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ec = U_ZERO_ERROR;
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} else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF)) {
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ec = U_INVALID_FORMAT_ERROR;
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}
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// Post-32bit second transitions
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ures_getByKey(res, kTRANSPOST32, &r, &ec);
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transitionTimesPost32 = ures_getIntVector(&r, &len, &ec);
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transitionCountPost32 = len >> 1;
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if (ec == U_MISSING_RESOURCE_ERROR) {
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// No pre-32bit transitions
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transitionTimesPost32 = NULL;
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transitionCountPost32 = 0;
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ec = U_ZERO_ERROR;
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} else if (U_SUCCESS(ec) && (len < 0 || len > 0x7FFF || (len & 1) != 0) /* len must be even */) {
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ec = U_INVALID_FORMAT_ERROR;
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}
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// Type offsets list must be of even size, with size >= 2
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ures_getByKey(res, kTYPEOFFSETS, &r, &ec);
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typeOffsets = ures_getIntVector(&r, &len, &ec);
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if (U_SUCCESS(ec) && (len < 2 || len > 0x7FFE || (len & 1) != 0)) {
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ec = U_INVALID_FORMAT_ERROR;
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}
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typeCount = (int16_t) len >> 1;
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// Type map data must be of the same size as the transition count
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typeMapData = NULL;
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if (transitionCount() > 0) {
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ures_getByKey(res, kTYPEMAP, &r, &ec);
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typeMapData = ures_getBinary(&r, &len, &ec);
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if (ec == U_MISSING_RESOURCE_ERROR) {
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// no type mapping data
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ec = U_INVALID_FORMAT_ERROR;
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} else if (U_SUCCESS(ec) && len != transitionCount()) {
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ec = U_INVALID_FORMAT_ERROR;
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}
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}
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// Process final rule and data, if any
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const UChar *ruleIdUStr = ures_getStringByKey(res, kFINALRULE, &len, &ec);
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ures_getByKey(res, kFINALRAW, &r, &ec);
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int32_t ruleRaw = ures_getInt(&r, &ec);
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ures_getByKey(res, kFINALYEAR, &r, &ec);
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int32_t ruleYear = ures_getInt(&r, &ec);
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if (U_SUCCESS(ec)) {
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UnicodeString ruleID(TRUE, ruleIdUStr, len);
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UResourceBundle *rule = TimeZone::loadRule(top, ruleID, NULL, ec);
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const int32_t *ruleData = ures_getIntVector(rule, &len, &ec);
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if (U_SUCCESS(ec) && len == 11) {
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UnicodeString emptyStr;
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finalZone = new SimpleTimeZone(
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ruleRaw * U_MILLIS_PER_SECOND,
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emptyStr,
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(int8_t)ruleData[0], (int8_t)ruleData[1], (int8_t)ruleData[2],
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ruleData[3] * U_MILLIS_PER_SECOND,
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(SimpleTimeZone::TimeMode) ruleData[4],
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(int8_t)ruleData[5], (int8_t)ruleData[6], (int8_t)ruleData[7],
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ruleData[8] * U_MILLIS_PER_SECOND,
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(SimpleTimeZone::TimeMode) ruleData[9],
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ruleData[10] * U_MILLIS_PER_SECOND, ec);
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if (finalZone == NULL) {
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ec = U_MEMORY_ALLOCATION_ERROR;
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} else {
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finalStartYear = ruleYear;
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// Note: Setting finalStartYear to the finalZone is problematic. When a date is around
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// year boundary, SimpleTimeZone may return false result when DST is observed at the
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// beginning of year. We could apply safe margin (day or two), but when one of recurrent
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// rules falls around year boundary, it could return false result. Without setting the
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// start year, finalZone works fine around the year boundary of the start year.
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// finalZone->setStartYear(finalStartYear);
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// Compute the millis for Jan 1, 0:00 GMT of the finalYear
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// Note: finalStartMillis is used for detecting either if
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// historic transition data or finalZone to be used. In an
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// extreme edge case - for example, two transitions fall into
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// small windows of time around the year boundary, this may
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// result incorrect offset computation. But I think it will
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// never happen practically. Yoshito - Feb 20, 2010
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finalStartMillis = Grego::fieldsToDay(finalStartYear, 0, 1) * U_MILLIS_PER_DAY;
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}
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} else {
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ec = U_INVALID_FORMAT_ERROR;
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}
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ures_close(rule);
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} else if (ec == U_MISSING_RESOURCE_ERROR) {
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// No final zone
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ec = U_ZERO_ERROR;
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}
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ures_close(&r);
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// initialize canonical ID
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canonicalID = ZoneMeta::getCanonicalCLDRID(tzid, ec);
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}
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if (U_FAILURE(ec)) {
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constructEmpty();
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}
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}
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/**
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* Copy constructor
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*/
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OlsonTimeZone::OlsonTimeZone(const OlsonTimeZone& other) :
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BasicTimeZone(other), finalZone(0) {
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*this = other;
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}
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/**
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* Assignment operator
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*/
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OlsonTimeZone& OlsonTimeZone::operator=(const OlsonTimeZone& other) {
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canonicalID = other.canonicalID;
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transitionTimesPre32 = other.transitionTimesPre32;
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transitionTimes32 = other.transitionTimes32;
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transitionTimesPost32 = other.transitionTimesPost32;
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transitionCountPre32 = other.transitionCountPre32;
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transitionCount32 = other.transitionCount32;
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transitionCountPost32 = other.transitionCountPost32;
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typeCount = other.typeCount;
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typeOffsets = other.typeOffsets;
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typeMapData = other.typeMapData;
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delete finalZone;
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finalZone = (other.finalZone != 0) ?
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(SimpleTimeZone*) other.finalZone->clone() : 0;
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finalStartYear = other.finalStartYear;
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finalStartMillis = other.finalStartMillis;
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clearTransitionRules();
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return *this;
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}
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/**
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* Destructor
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*/
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OlsonTimeZone::~OlsonTimeZone() {
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deleteTransitionRules();
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delete finalZone;
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}
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/**
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* Returns true if the two TimeZone objects are equal.
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*/
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UBool OlsonTimeZone::operator==(const TimeZone& other) const {
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return ((this == &other) ||
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(typeid(*this) == typeid(other) &&
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TimeZone::operator==(other) &&
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hasSameRules(other)));
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}
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/**
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* TimeZone API.
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*/
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TimeZone* OlsonTimeZone::clone() const {
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return new OlsonTimeZone(*this);
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}
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/**
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* TimeZone API.
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*/
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int32_t OlsonTimeZone::getOffset(uint8_t era, int32_t year, int32_t month,
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int32_t dom, uint8_t dow,
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int32_t millis, UErrorCode& ec) const {
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if (month < UCAL_JANUARY || month > UCAL_DECEMBER) {
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if (U_SUCCESS(ec)) {
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ec = U_ILLEGAL_ARGUMENT_ERROR;
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}
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return 0;
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} else {
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return getOffset(era, year, month, dom, dow, millis,
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Grego::monthLength(year, month),
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ec);
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}
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}
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/**
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* TimeZone API.
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*/
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int32_t OlsonTimeZone::getOffset(uint8_t era, int32_t year, int32_t month,
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int32_t dom, uint8_t dow,
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int32_t millis, int32_t monthLength,
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UErrorCode& ec) const {
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if (U_FAILURE(ec)) {
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return 0;
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}
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if ((era != GregorianCalendar::AD && era != GregorianCalendar::BC)
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|| month < UCAL_JANUARY
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|| month > UCAL_DECEMBER
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|| dom < 1
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|| dom > monthLength
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|| dow < UCAL_SUNDAY
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|| dow > UCAL_SATURDAY
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|| millis < 0
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|| millis >= U_MILLIS_PER_DAY
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|| monthLength < 28
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|| monthLength > 31) {
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ec = U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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if (era == GregorianCalendar::BC) {
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year = -year;
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}
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if (finalZone != NULL && year >= finalStartYear) {
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return finalZone->getOffset(era, year, month, dom, dow,
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millis, monthLength, ec);
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}
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// Compute local epoch millis from input fields
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UDate date = (UDate)(Grego::fieldsToDay(year, month, dom) * U_MILLIS_PER_DAY + millis);
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int32_t rawoff, dstoff;
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getHistoricalOffset(date, TRUE, kDaylight, kStandard, rawoff, dstoff);
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return rawoff + dstoff;
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}
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/**
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* TimeZone API.
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*/
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void OlsonTimeZone::getOffset(UDate date, UBool local, int32_t& rawoff,
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int32_t& dstoff, UErrorCode& ec) const {
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if (U_FAILURE(ec)) {
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return;
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}
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if (finalZone != NULL && date >= finalStartMillis) {
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finalZone->getOffset(date, local, rawoff, dstoff, ec);
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} else {
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getHistoricalOffset(date, local, kFormer, kLatter, rawoff, dstoff);
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}
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}
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void
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OlsonTimeZone::getOffsetFromLocal(UDate date, int32_t nonExistingTimeOpt, int32_t duplicatedTimeOpt,
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int32_t& rawoff, int32_t& dstoff, UErrorCode& ec) const {
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if (U_FAILURE(ec)) {
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return;
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}
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if (finalZone != NULL && date >= finalStartMillis) {
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finalZone->getOffsetFromLocal(date, nonExistingTimeOpt, duplicatedTimeOpt, rawoff, dstoff, ec);
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} else {
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getHistoricalOffset(date, TRUE, nonExistingTimeOpt, duplicatedTimeOpt, rawoff, dstoff);
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}
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}
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/**
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* TimeZone API.
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*/
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void OlsonTimeZone::setRawOffset(int32_t /*offsetMillis*/) {
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// We don't support this operation, since OlsonTimeZones are
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// immutable (except for the ID, which is in the base class).
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// Nothing to do!
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}
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/**
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* TimeZone API.
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*/
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int32_t OlsonTimeZone::getRawOffset() const {
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UErrorCode ec = U_ZERO_ERROR;
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int32_t raw, dst;
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getOffset((double) uprv_getUTCtime() * U_MILLIS_PER_SECOND,
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FALSE, raw, dst, ec);
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return raw;
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}
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#if defined U_DEBUG_TZ
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void printTime(double ms) {
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int32_t year, month, dom, dow;
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double millis=0;
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double days = ClockMath::floorDivide(((double)ms), (double)U_MILLIS_PER_DAY, millis);
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Grego::dayToFields(days, year, month, dom, dow);
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U_DEBUG_TZ_MSG((" getHistoricalOffset: time %.1f (%04d.%02d.%02d+%.1fh)\n", ms,
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year, month+1, dom, (millis/kOneHour)));
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}
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#endif
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int64_t
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OlsonTimeZone::transitionTimeInSeconds(int16_t transIdx) const {
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U_ASSERT(transIdx >= 0 && transIdx < transitionCount());
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if (transIdx < transitionCountPre32) {
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return (((int64_t)((uint32_t)transitionTimesPre32[transIdx << 1])) << 32)
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| ((int64_t)((uint32_t)transitionTimesPre32[(transIdx << 1) + 1]));
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}
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transIdx -= transitionCountPre32;
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if (transIdx < transitionCount32) {
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return (int64_t)transitionTimes32[transIdx];
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}
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transIdx -= transitionCount32;
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return (((int64_t)((uint32_t)transitionTimesPost32[transIdx << 1])) << 32)
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| ((int64_t)((uint32_t)transitionTimesPost32[(transIdx << 1) + 1]));
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}
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void
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OlsonTimeZone::getHistoricalOffset(UDate date, UBool local,
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int32_t NonExistingTimeOpt, int32_t DuplicatedTimeOpt,
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int32_t& rawoff, int32_t& dstoff) const {
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U_DEBUG_TZ_MSG(("getHistoricalOffset(%.1f, %s, %d, %d, raw, dst)\n",
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date, local?"T":"F", NonExistingTimeOpt, DuplicatedTimeOpt));
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#if defined U_DEBUG_TZ
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printTime(date*1000.0);
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#endif
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int16_t transCount = transitionCount();
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|
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if (transCount > 0) {
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double sec = uprv_floor(date / U_MILLIS_PER_SECOND);
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if (!local && sec < transitionTimeInSeconds(0)) {
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// Before the first transition time
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rawoff = initialRawOffset() * U_MILLIS_PER_SECOND;
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dstoff = initialDstOffset() * U_MILLIS_PER_SECOND;
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} else {
|
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// Linear search from the end is the fastest approach, since
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// most lookups will happen at/near the end.
|
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int16_t transIdx;
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for (transIdx = transCount - 1; transIdx >= 0; transIdx--) {
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int64_t transition = transitionTimeInSeconds(transIdx);
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|
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if (local) {
|
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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;
|
|
transitionRulesInitialized = FALSE;
|
|
}
|
|
|
|
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 UMutex gLock = U_MUTEX_INITIALIZER;
|
|
|
|
void
|
|
OlsonTimeZone::checkTransitionRules(UErrorCode& status) const {
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
UBool initialized;
|
|
UMTX_CHECK(&gLock, transitionRulesInitialized, initialized);
|
|
if (!initialized) {
|
|
umtx_lock(&gLock);
|
|
if (!transitionRulesInitialized) {
|
|
OlsonTimeZone *ncThis = const_cast<OlsonTimeZone*>(this);
|
|
ncThis->initTransitionRules(status);
|
|
}
|
|
umtx_unlock(&gLock);
|
|
}
|
|
}
|
|
|
|
void
|
|
OlsonTimeZone::initTransitionRules(UErrorCode& status) {
|
|
if(U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
if (transitionRulesInitialized) {
|
|
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);
|
|
}
|
|
transitionRulesInitialized = TRUE;
|
|
}
|
|
|
|
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
|