/*
*******************************************************************************
* Copyright (C) 1997-2013, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*
* File TIMEZONE.CPP
*
* Modification History:
*
* Date Name Description
* 12/05/96 clhuang Creation.
* 04/21/97 aliu General clean-up and bug fixing.
* 05/08/97 aliu Fixed Hashtable code per code review.
* 07/09/97 helena Changed createInstance to createDefault.
* 07/29/97 aliu Updated with all-new list of 96 UNIX-derived
* TimeZones. Changed mechanism to load from static
* array rather than resource bundle.
* 07/07/1998 srl Bugfixes from the Java side: UTC GMT CAT NST
* Added getDisplayName API
* going to add custom parsing.
*
* ISSUES:
* - should getDisplayName cache something?
* - should custom time zones be cached? [probably]
* 08/10/98 stephen Brought getDisplayName() API in-line w/ conventions
* 08/19/98 stephen Changed createTimeZone() to never return 0
* 09/02/98 stephen Added getOffset(monthLen) and hasSameRules()
* 09/15/98 stephen Added getStaticClassID()
* 02/22/99 stephen Removed character literals for EBCDIC safety
* 05/04/99 stephen Changed initDefault() for Mutex issues
* 07/12/99 helena HPUX 11 CC Port.
* 12/03/99 aliu Moved data out of static table into icudata.dll.
* Substantial rewrite of zone lookup, default zone, and
* available IDs code. Misc. cleanup.
*********************************************************************************/
#include "utypeinfo.h" // for 'typeid' to work
#include "unicode/utypes.h"
#include "unicode/ustring.h"
#include "uassert.h"
#include "ustr_imp.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);
}
static char gStrBuf[256];
#define U_DEBUG_TZ_STR(x) u_austrncpy(gStrBuf,x,sizeof(gStrBuf)-1)
// 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
#if !UCONFIG_NO_FORMATTING
#include "unicode/simpletz.h"
#include "unicode/calendar.h"
#include "unicode/gregocal.h"
#include "unicode/ures.h"
#include "unicode/tzfmt.h"
#include "unicode/numfmt.h"
#include "gregoimp.h"
#include "uresimp.h" // struct UResourceBundle
#include "olsontz.h"
#include "mutex.h"
#include "unicode/udata.h"
#include "ucln_in.h"
#include "cstring.h"
#include "cmemory.h"
#include "unicode/strenum.h"
#include "uassert.h"
#include "zonemeta.h"
#define kZONEINFO "zoneinfo64"
#define kREGIONS "Regions"
#define kZONES "Zones"
#define kRULES "Rules"
#define kNAMES "Names"
#define kTZVERSION "TZVersion"
#define kLINKS "links"
#define kMAX_CUSTOM_HOUR 23
#define kMAX_CUSTOM_MIN 59
#define kMAX_CUSTOM_SEC 59
#define MINUS 0x002D
#define PLUS 0x002B
#define ZERO_DIGIT 0x0030
#define COLON 0x003A
// Static data and constants
static const UChar WORLD[] = {0x30, 0x30, 0x31, 0x00}; /* "001" */
static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
static const int32_t GMT_ID_LENGTH = 3;
static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
static icu::TimeZone* DEFAULT_ZONE = NULL;
static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
static icu::TimeZone* _GMT = NULL;
static icu::TimeZone* _UNKNOWN_ZONE = NULL;
static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
static char TZDATA_VERSION[16];
static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
static int32_t* MAP_SYSTEM_ZONES = NULL;
static int32_t* MAP_CANONICAL_SYSTEM_ZONES = NULL;
static int32_t* MAP_CANONICAL_SYSTEM_LOCATION_ZONES = NULL;
static int32_t LEN_SYSTEM_ZONES = 0;
static int32_t LEN_CANONICAL_SYSTEM_ZONES = 0;
static int32_t LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
static icu::UInitOnce gSystemZonesInitOnce = U_INITONCE_INITIALIZER;
static icu::UInitOnce gCanonicalZonesInitOnce = U_INITONCE_INITIALIZER;
static icu::UInitOnce gCanonicalLocationZonesInitOnce = U_INITONCE_INITIALIZER;
U_CDECL_BEGIN
static UBool U_CALLCONV timeZone_cleanup(void)
{
U_NAMESPACE_USE
delete DEFAULT_ZONE;
DEFAULT_ZONE = NULL;
gDefaultZoneInitOnce.reset();
delete _GMT;
_GMT = NULL;
delete _UNKNOWN_ZONE;
_UNKNOWN_ZONE = NULL;
gStaticZonesInitOnce.reset();
uprv_memset(TZDATA_VERSION, 0, sizeof(TZDATA_VERSION));
gTZDataVersionInitOnce.reset();
LEN_SYSTEM_ZONES = 0;
uprv_free(MAP_SYSTEM_ZONES);
MAP_SYSTEM_ZONES = 0;
gSystemZonesInitOnce.reset();
LEN_CANONICAL_SYSTEM_ZONES = 0;
uprv_free(MAP_CANONICAL_SYSTEM_ZONES);
MAP_CANONICAL_SYSTEM_ZONES = 0;
gCanonicalZonesInitOnce.reset();
LEN_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
uprv_free(MAP_CANONICAL_SYSTEM_LOCATION_ZONES);
MAP_CANONICAL_SYSTEM_LOCATION_ZONES = 0;
gCanonicalLocationZonesInitOnce.reset();
return TRUE;
}
U_CDECL_END
U_NAMESPACE_BEGIN
static int32_t findInStringArray(UResourceBundle* array, const UnicodeString& id, UErrorCode &status)
{
UnicodeString copy;
const UChar *u;
int32_t len;
int32_t start = 0;
int32_t limit = ures_getSize(array);
int32_t mid;
int32_t lastMid = INT32_MAX;
if(U_FAILURE(status) || (limit < 1)) {
return -1;
}
U_DEBUG_TZ_MSG(("fisa: Looking for %s, between %d and %d\n", U_DEBUG_TZ_STR(UnicodeString(id).getTerminatedBuffer()), start, limit));
for (;;) {
mid = (int32_t)((start + limit) / 2);
if (lastMid == mid) { /* Have we moved? */
break; /* We haven't moved, and it wasn't found. */
}
lastMid = mid;
u = ures_getStringByIndex(array, mid, &len, &status);
if (U_FAILURE(status)) {
break;
}
U_DEBUG_TZ_MSG(("tz: compare to %s, %d .. [%d] .. %d\n", U_DEBUG_TZ_STR(u), start, mid, limit));
copy.setTo(TRUE, u, len);
int r = id.compare(copy);
if(r==0) {
U_DEBUG_TZ_MSG(("fisa: found at %d\n", mid));
return mid;
} else if(r<0) {
limit = mid;
} else {
start = mid;
}
}
U_DEBUG_TZ_MSG(("fisa: not found\n"));
return -1;
}
/**
* Fetch a specific zone by name. Replaces the getByKey call.
* @param top Top timezone resource
* @param id Time zone ID
* @param oldbundle Bundle for reuse (or NULL). see 'ures_open()'
* @return the zone's bundle if found, or undefined if error. Reuses oldbundle.
*/
static UResourceBundle* getZoneByName(const UResourceBundle* top, const UnicodeString& id, UResourceBundle *oldbundle, UErrorCode& status) {
// load the Rules object
UResourceBundle *tmp = ures_getByKey(top, kNAMES, NULL, &status);
// search for the string
int32_t idx = findInStringArray(tmp, id, status);
if((idx == -1) && U_SUCCESS(status)) {
// not found
status = U_MISSING_RESOURCE_ERROR;
//ures_close(oldbundle);
//oldbundle = NULL;
} else {
U_DEBUG_TZ_MSG(("gzbn: oldbundle= size %d, type %d, %s\n", ures_getSize(tmp), ures_getType(tmp), u_errorName(status)));
tmp = ures_getByKey(top, kZONES, tmp, &status); // get Zones object from top
U_DEBUG_TZ_MSG(("gzbn: loaded ZONES, size %d, type %d, path %s %s\n", ures_getSize(tmp), ures_getType(tmp), ures_getPath(tmp), u_errorName(status)));
oldbundle = ures_getByIndex(tmp, idx, oldbundle, &status); // get nth Zone object
U_DEBUG_TZ_MSG(("gzbn: loaded z#%d, size %d, type %d, path %s, %s\n", idx, ures_getSize(oldbundle), ures_getType(oldbundle), ures_getPath(oldbundle), u_errorName(status)));
}
ures_close(tmp);
if(U_FAILURE(status)) {
//ures_close(oldbundle);
return NULL;
} else {
return oldbundle;
}
}
UResourceBundle* TimeZone::loadRule(const UResourceBundle* top, const UnicodeString& ruleid, UResourceBundle* oldbundle, UErrorCode& status) {
char key[64];
ruleid.extract(0, sizeof(key)-1, key, (int32_t)sizeof(key)-1, US_INV);
U_DEBUG_TZ_MSG(("loadRule(%s)\n", key));
UResourceBundle *r = ures_getByKey(top, kRULES, oldbundle, &status);
U_DEBUG_TZ_MSG(("loadRule(%s) -> kRULES [%s]\n", key, u_errorName(status)));
r = ures_getByKey(r, key, r, &status);
U_DEBUG_TZ_MSG(("loadRule(%s) -> item [%s]\n", key, u_errorName(status)));
return r;
}
/**
* Given an ID, open the appropriate resource for the given time zone.
* Dereference aliases if necessary.
* @param id zone id
* @param res resource, which must be ready for use (initialized but not open)
* @param ec input-output error code
* @return top-level resource bundle
*/
static UResourceBundle* openOlsonResource(const UnicodeString& id,
UResourceBundle& res,
UErrorCode& ec)
{
#if U_DEBUG_TZ
char buf[128];
id.extract(0, sizeof(buf)-1, buf, sizeof(buf), "");
#endif
UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
U_DEBUG_TZ_MSG(("pre: res sz=%d\n", ures_getSize(&res)));
/* &res = */ getZoneByName(top, id, &res, ec);
// Dereference if this is an alias. Docs say result should be 1
// but it is 0 in 2.8 (?).
U_DEBUG_TZ_MSG(("Loading zone '%s' (%s, size %d) - %s\n", buf, ures_getKey((UResourceBundle*)&res), ures_getSize(&res), u_errorName(ec)));
if (ures_getType(&res) == URES_INT) {
int32_t deref = ures_getInt(&res, &ec) + 0;
U_DEBUG_TZ_MSG(("getInt: %s - type is %d\n", u_errorName(ec), ures_getType(&res)));
UResourceBundle *ares = ures_getByKey(top, kZONES, NULL, &ec); // dereference Zones section
ures_getByIndex(ares, deref, &res, &ec);
ures_close(ares);
U_DEBUG_TZ_MSG(("alias to #%d (%s) - %s\n", deref, "??", u_errorName(ec)));
} else {
U_DEBUG_TZ_MSG(("not an alias - size %d\n", ures_getSize(&res)));
}
U_DEBUG_TZ_MSG(("%s - final status is %s\n", buf, u_errorName(ec)));
return top;
}
// -------------------------------------
namespace {
void U_CALLCONV initStaticTimeZones() {
// Initialize _GMT independently of other static data; it should
// be valid even if we can't load the time zone UDataMemory.
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
_UNKNOWN_ZONE = new SimpleTimeZone(0, UnicodeString(TRUE, UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH));
_GMT = new SimpleTimeZone(0, UnicodeString(TRUE, GMT_ID, GMT_ID_LENGTH));
}
} // anonymous namespace
const TimeZone& U_EXPORT2
TimeZone::getUnknown()
{
umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
return *_UNKNOWN_ZONE;
}
const TimeZone* U_EXPORT2
TimeZone::getGMT(void)
{
umtx_initOnce(gStaticZonesInitOnce, &initStaticTimeZones);
return _GMT;
}
// *****************************************************************************
// class TimeZone
// *****************************************************************************
UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(TimeZone)
TimeZone::TimeZone()
: UObject(), fID()
{
}
// -------------------------------------
TimeZone::TimeZone(const UnicodeString &id)
: UObject(), fID(id)
{
}
// -------------------------------------
TimeZone::~TimeZone()
{
}
// -------------------------------------
TimeZone::TimeZone(const TimeZone &source)
: UObject(source), fID(source.fID)
{
}
// -------------------------------------
TimeZone &
TimeZone::operator=(const TimeZone &right)
{
if (this != &right) fID = right.fID;
return *this;
}
// -------------------------------------
UBool
TimeZone::operator==(const TimeZone& that) const
{
return typeid(*this) == typeid(that) &&
fID == that.fID;
}
// -------------------------------------
namespace {
TimeZone*
createSystemTimeZone(const UnicodeString& id, UErrorCode& ec) {
if (U_FAILURE(ec)) {
return NULL;
}
TimeZone* z = 0;
UResourceBundle res;
ures_initStackObject(&res);
U_DEBUG_TZ_MSG(("pre-err=%s\n", u_errorName(ec)));
UResourceBundle *top = openOlsonResource(id, res, ec);
U_DEBUG_TZ_MSG(("post-err=%s\n", u_errorName(ec)));
if (U_SUCCESS(ec)) {
z = new OlsonTimeZone(top, &res, id, ec);
if (z == NULL) {
U_DEBUG_TZ_MSG(("cstz: olson time zone failed to initialize - err %s\n", u_errorName(ec)));
}
}
ures_close(&res);
ures_close(top);
if (U_FAILURE(ec)) {
U_DEBUG_TZ_MSG(("cstz: failed to create, err %s\n", u_errorName(ec)));
delete z;
z = 0;
}
return z;
}
/**
* Lookup the given name in our system zone table. If found,
* instantiate a new zone of that name and return it. If not
* found, return 0.
*/
TimeZone*
createSystemTimeZone(const UnicodeString& id) {
UErrorCode ec = U_ZERO_ERROR;
return createSystemTimeZone(id, ec);
}
}
TimeZone* U_EXPORT2
TimeZone::createTimeZone(const UnicodeString& ID)
{
/* We first try to lookup the zone ID in our system list. If this
* fails, we try to parse it as a custom string GMT[+-]hh:mm. If
* all else fails, we return GMT, which is probably not what the
* user wants, but at least is a functioning TimeZone object.
*
* We cannot return NULL, because that would break compatibility
* with the JDK.
*/
TimeZone* result = createSystemTimeZone(ID);
if (result == 0) {
U_DEBUG_TZ_MSG(("failed to load system time zone with id - falling to custom"));
result = createCustomTimeZone(ID);
}
if (result == 0) {
U_DEBUG_TZ_MSG(("failed to load time zone with id - falling to Etc/Unknown(GMT)"));
result = getUnknown().clone();
}
return result;
}
// -------------------------------------
/**
* Initialize DEFAULT_ZONE from the system default time zone.
* Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
* returns NULL.
*/
static void U_CALLCONV initDefault()
{
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
// If setDefault() has already been called we can skip getting the
// default zone information from the system.
if (DEFAULT_ZONE != NULL) {
return;
}
// We access system timezone data through TPlatformUtilities,
// including tzset(), timezone, and tzname[].
int32_t rawOffset = 0;
const char *hostID;
// First, try to create a system timezone, based
// on the string ID in tzname[0].
// NOTE: this code is safely single threaded, being only
// run via umtx_initOnce().
//
// Some of the locale/timezone OS functions may not be thread safe,
//
// The operating system might actually use ICU to implement timezones.
// So we may have ICU calling ICU here, like on AIX.
// There shouldn't be a problem with this; initOnce does not hold a mutex
// while the init function is being run.
uprv_tzset(); // Initialize tz... system data
// Get the timezone ID from the host. This function should do
// any required host-specific remapping; e.g., on Windows this
// function maps the Date and Time control panel setting to an
// ICU timezone ID.
hostID = uprv_tzname(0);
// Invert sign because UNIX semantics are backwards
rawOffset = uprv_timezone() * -U_MILLIS_PER_SECOND;
TimeZone* default_zone = NULL;
/* Make sure that the string is NULL terminated to prevent BoundsChecker/Purify warnings. */
UnicodeString hostStrID(hostID, -1, US_INV);
hostStrID.append((UChar)0);
hostStrID.truncate(hostStrID.length()-1);
default_zone = createSystemTimeZone(hostStrID);
#if U_PLATFORM_USES_ONLY_WIN32_API
// hostID points to a heap-allocated location on Windows.
uprv_free(const_cast<char *>(hostID));
#endif
int32_t hostIDLen = hostStrID.length();
if (default_zone != NULL && rawOffset != default_zone->getRawOffset()
&& (3 <= hostIDLen && hostIDLen <= 4))
{
// Uh oh. This probably wasn't a good id.
// It was probably an ambiguous abbreviation
delete default_zone;
default_zone = NULL;
}
// Construct a fixed standard zone with the host's ID
// and raw offset.
if (default_zone == NULL) {
default_zone = new SimpleTimeZone(rawOffset, hostStrID);
}
// If we _still_ don't have a time zone, use GMT.
if (default_zone == NULL) {
const TimeZone* temptz = TimeZone::getGMT();
// If we can't use GMT, get out.
if (temptz == NULL) {
return;
}
default_zone = temptz->clone();
}
// The only way for DEFAULT_ZONE to be non-null at this point is if the user
// made a thread-unsafe call to setDefault() or adoptDefault() in another
// thread while this thread was doing something that required getting the default.
U_ASSERT(DEFAULT_ZONE == NULL);
DEFAULT_ZONE = default_zone;
}
// -------------------------------------
TimeZone* U_EXPORT2
TimeZone::createDefault()
{
umtx_initOnce(gDefaultZoneInitOnce, initDefault);
return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
}
// -------------------------------------
void U_EXPORT2
TimeZone::adoptDefault(TimeZone* zone)
{
if (zone != NULL)
{
TimeZone *old = DEFAULT_ZONE;
DEFAULT_ZONE = zone;
delete old;
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
}
}
// -------------------------------------
void U_EXPORT2
TimeZone::setDefault(const TimeZone& zone)
{
adoptDefault(zone.clone());
}
//----------------------------------------------------------------------
static void U_CALLCONV initMap(USystemTimeZoneType type, UErrorCode& ec) {
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
if (U_SUCCESS(ec)) {
int32_t size = ures_getSize(res);
int32_t *m = (int32_t *)uprv_malloc(size * sizeof(int32_t));
if (m == NULL) {
ec = U_MEMORY_ALLOCATION_ERROR;
} else {
int32_t numEntries = 0;
for (int32_t i = 0; i < size; i++) {
UnicodeString id = ures_getUnicodeStringByIndex(res, i, &ec);
if (U_FAILURE(ec)) {
break;
}
if (0 == id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH)) {
// exclude Etc/Unknown
continue;
}
if (type == UCAL_ZONE_TYPE_CANONICAL || type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
UnicodeString canonicalID;
ZoneMeta::getCanonicalCLDRID(id, canonicalID, ec);
if (U_FAILURE(ec)) {
break;
}
if (canonicalID != id) {
// exclude aliases
continue;
}
}
if (type == UCAL_ZONE_TYPE_CANONICAL_LOCATION) {
const UChar *region = TimeZone::getRegion(id, ec);
if (U_FAILURE(ec)) {
break;
}
if (u_strcmp(region, WORLD) == 0) {
// exclude non-location ("001")
continue;
}
}
m[numEntries++] = i;
}
if (U_SUCCESS(ec)) {
int32_t *tmp = m;
m = (int32_t *)uprv_realloc(tmp, numEntries * sizeof(int32_t));
if (m == NULL) {
// realloc failed.. use the original one even it has unused
// area at the end
m = tmp;
}
switch(type) {
case UCAL_ZONE_TYPE_ANY:
U_ASSERT(MAP_SYSTEM_ZONES == NULL);
MAP_SYSTEM_ZONES = m;
LEN_SYSTEM_ZONES = numEntries;
break;
case UCAL_ZONE_TYPE_CANONICAL:
U_ASSERT(MAP_CANONICAL_SYSTEM_ZONES == NULL);
MAP_CANONICAL_SYSTEM_ZONES = m;
LEN_CANONICAL_SYSTEM_ZONES = numEntries;
break;
case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
U_ASSERT(MAP_CANONICAL_SYSTEM_LOCATION_ZONES == NULL);
MAP_CANONICAL_SYSTEM_LOCATION_ZONES = m;
LEN_CANONICAL_SYSTEM_LOCATION_ZONES = numEntries;
break;
}
}
}
}
ures_close(res);
}
/**
* This is the default implementation for subclasses that do not
* override this method. This implementation calls through to the
* 8-argument getOffset() method after suitable computations, and
* correctly adjusts GMT millis to local millis when necessary.
*/
void TimeZone::getOffset(UDate date, UBool local, int32_t& rawOffset,
int32_t& dstOffset, UErrorCode& ec) const {
if (U_FAILURE(ec)) {
return;
}
rawOffset = getRawOffset();
if (!local) {
date += rawOffset; // now in local standard millis
}
// When local == TRUE, date might not be in local standard
// millis. getOffset taking 7 parameters used here assume
// the given time in day is local standard time.
// At STD->DST transition, there is a range of time which
// does not exist. When 'date' is in this time range
// (and local == TRUE), this method interprets the specified
// local time as DST. At DST->STD transition, there is a
// range of time which occurs twice. In this case, this
// method interprets the specified local time as STD.
// To support the behavior above, we need to call getOffset
// (with 7 args) twice when local == true and DST is
// detected in the initial call.
for (int32_t pass=0; ; ++pass) {
int32_t year, month, dom, dow;
double day = uprv_floor(date / U_MILLIS_PER_DAY);
int32_t millis = (int32_t) (date - day * U_MILLIS_PER_DAY);
Grego::dayToFields(day, year, month, dom, dow);
dstOffset = getOffset(GregorianCalendar::AD, year, month, dom,
(uint8_t) dow, millis,
Grego::monthLength(year, month),
ec) - rawOffset;
// Recompute if local==TRUE, dstOffset!=0.
if (pass!=0 || !local || dstOffset == 0) {
break;
}
// adjust to local standard millis
date -= dstOffset;
}
}
// -------------------------------------
// New available IDs API as of ICU 2.4. Uses StringEnumeration API.
class TZEnumeration : public StringEnumeration {
private:
// Map into to zones. Our results are zone[map[i]] for
// i=0..len-1, where zone[i] is the i-th Olson zone. If map==NULL
// then our results are zone[i] for i=0..len-1. Len will be zero
// if the zone data could not be loaded.
int32_t* map;
int32_t* localMap;
int32_t len;
int32_t pos;
TZEnumeration(int32_t* mapData, int32_t mapLen, UBool adoptMapData) : pos(0) {
map = mapData;
localMap = adoptMapData ? mapData : NULL;
len = mapLen;
}
UBool getID(int32_t i) {
UErrorCode ec = U_ZERO_ERROR;
int32_t idLen = 0;
const UChar* id = NULL;
UResourceBundle *top = ures_openDirect(0, kZONEINFO, &ec);
top = ures_getByKey(top, kNAMES, top, &ec); // dereference Zones section
id = ures_getStringByIndex(top, i, &idLen, &ec);
if(U_FAILURE(ec)) {
unistr.truncate(0);
}
else {
unistr.fastCopyFrom(UnicodeString(TRUE, id, idLen));
}
ures_close(top);
return U_SUCCESS(ec);
}
static int32_t* getMap(USystemTimeZoneType type, int32_t& len, UErrorCode& ec) {
len = 0;
if (U_FAILURE(ec)) {
return NULL;
}
int32_t* m = NULL;
switch (type) {
case UCAL_ZONE_TYPE_ANY:
umtx_initOnce(gSystemZonesInitOnce, &initMap, type, ec);
m = MAP_SYSTEM_ZONES;
len = LEN_SYSTEM_ZONES;
break;
case UCAL_ZONE_TYPE_CANONICAL:
umtx_initOnce(gCanonicalZonesInitOnce, &initMap, type, ec);
m = MAP_CANONICAL_SYSTEM_ZONES;
len = LEN_CANONICAL_SYSTEM_ZONES;
break;
case UCAL_ZONE_TYPE_CANONICAL_LOCATION:
umtx_initOnce(gCanonicalLocationZonesInitOnce, &initMap, type, ec);
m = MAP_CANONICAL_SYSTEM_LOCATION_ZONES;
len = LEN_CANONICAL_SYSTEM_LOCATION_ZONES;
break;
default:
ec = U_ILLEGAL_ARGUMENT_ERROR;
m = NULL;
len = 0;
break;
}
return m;
}
public:
#define DEFAULT_FILTERED_MAP_SIZE 8
#define MAP_INCREMENT_SIZE 8
static TZEnumeration* create(USystemTimeZoneType type, const char* region, const int32_t* rawOffset, UErrorCode& ec) {
if (U_FAILURE(ec)) {
return NULL;
}
int32_t baseLen;
int32_t *baseMap = getMap(type, baseLen, ec);
if (U_FAILURE(ec)) {
return NULL;
}
// If any additional conditions are available,
// create instance local map filtered by the conditions.
int32_t *filteredMap = NULL;
int32_t numEntries = 0;
if (region != NULL || rawOffset != NULL) {
int32_t filteredMapSize = DEFAULT_FILTERED_MAP_SIZE;
filteredMap = (int32_t *)uprv_malloc(filteredMapSize * sizeof(int32_t));
if (filteredMap == NULL) {
ec = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
// Walk through the base map
UResourceBundle *res = ures_openDirect(0, kZONEINFO, &ec);
res = ures_getByKey(res, kNAMES, res, &ec); // dereference Zones section
for (int32_t i = 0; i < baseLen; i++) {
int32_t zidx = baseMap[i];
UnicodeString id = ures_getUnicodeStringByIndex(res, zidx, &ec);
if (U_FAILURE(ec)) {
break;
}
if (region != NULL) {
// Filter by region
char tzregion[4]; // max 3 letters + null term
TimeZone::getRegion(id, tzregion, sizeof(tzregion), ec);
if (U_FAILURE(ec)) {
break;
}
if (uprv_stricmp(tzregion, region) != 0) {
// region does not match
continue;
}
}
if (rawOffset != NULL) {
// Filter by raw offset
// Note: This is VERY inefficient
TimeZone *z = createSystemTimeZone(id, ec);
if (U_FAILURE(ec)) {
break;
}
int32_t tzoffset = z->getRawOffset();
delete z;
if (tzoffset != *rawOffset) {
continue;
}
}
if (filteredMapSize <= numEntries) {
filteredMapSize += MAP_INCREMENT_SIZE;
int32_t *tmp = (int32_t *)uprv_realloc(filteredMap, filteredMapSize * sizeof(int32_t));
if (tmp == NULL) {
ec = U_MEMORY_ALLOCATION_ERROR;
break;
} else {
filteredMap = tmp;
}
}
filteredMap[numEntries++] = zidx;
}
if (U_FAILURE(ec)) {
uprv_free(filteredMap);
filteredMap = NULL;
}
ures_close(res);
}
TZEnumeration *result = NULL;
if (U_SUCCESS(ec)) {
// Finally, create a new enumeration instance
if (filteredMap == NULL) {
result = new TZEnumeration(baseMap, baseLen, FALSE);
} else {
result = new TZEnumeration(filteredMap, numEntries, TRUE);
filteredMap = NULL;
}
if (result == NULL) {
ec = U_MEMORY_ALLOCATION_ERROR;
}
}
if (filteredMap != NULL) {
uprv_free(filteredMap);
}
return result;
}
TZEnumeration(const TZEnumeration &other) : StringEnumeration(), map(NULL), localMap(NULL), len(0), pos(0) {
if (other.localMap != NULL) {
localMap = (int32_t *)uprv_malloc(other.len * sizeof(int32_t));
if (localMap != NULL) {
len = other.len;
uprv_memcpy(localMap, other.localMap, len * sizeof(int32_t));
pos = other.pos;
map = localMap;
} else {
len = 0;
pos = 0;
map = NULL;
}
} else {
map = other.map;
localMap = NULL;
len = other.len;
pos = other.pos;
}
}
virtual ~TZEnumeration();
virtual StringEnumeration *clone() const {
return new TZEnumeration(*this);
}
virtual int32_t count(UErrorCode& status) const {
return U_FAILURE(status) ? 0 : len;
}
virtual const UnicodeString* snext(UErrorCode& status) {
if (U_SUCCESS(status) && map != NULL && pos < len) {
getID(map[pos]);
++pos;
return &unistr;
}
return 0;
}
virtual void reset(UErrorCode& /*status*/) {
pos = 0;
}
public:
static UClassID U_EXPORT2 getStaticClassID(void);
virtual UClassID getDynamicClassID(void) const;
};
TZEnumeration::~TZEnumeration() {
if (localMap != NULL) {
uprv_free(localMap);
}
}
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TZEnumeration)
StringEnumeration* U_EXPORT2
TimeZone::createTimeZoneIDEnumeration(
USystemTimeZoneType zoneType,
const char* region,
const int32_t* rawOffset,
UErrorCode& ec) {
return TZEnumeration::create(zoneType, region, rawOffset, ec);
}
StringEnumeration* U_EXPORT2
TimeZone::createEnumeration() {
UErrorCode ec = U_ZERO_ERROR;
return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, NULL, ec);
}
StringEnumeration* U_EXPORT2
TimeZone::createEnumeration(int32_t rawOffset) {
UErrorCode ec = U_ZERO_ERROR;
return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, NULL, &rawOffset, ec);
}
StringEnumeration* U_EXPORT2
TimeZone::createEnumeration(const char* country) {
UErrorCode ec = U_ZERO_ERROR;
return TZEnumeration::create(UCAL_ZONE_TYPE_ANY, country, NULL, ec);
}
// ---------------------------------------
int32_t U_EXPORT2
TimeZone::countEquivalentIDs(const UnicodeString& id) {
int32_t result = 0;
UErrorCode ec = U_ZERO_ERROR;
UResourceBundle res;
ures_initStackObject(&res);
U_DEBUG_TZ_MSG(("countEquivalentIDs..\n"));
UResourceBundle *top = openOlsonResource(id, res, ec);
if (U_SUCCESS(ec)) {
UResourceBundle r;
ures_initStackObject(&r);
ures_getByKey(&res, kLINKS, &r, &ec);
ures_getIntVector(&r, &result, &ec);
ures_close(&r);
}
ures_close(&res);
ures_close(top);
return result;
}
// ---------------------------------------
const UnicodeString U_EXPORT2
TimeZone::getEquivalentID(const UnicodeString& id, int32_t index) {
U_DEBUG_TZ_MSG(("gEI(%d)\n", index));
UnicodeString result;
UErrorCode ec = U_ZERO_ERROR;
UResourceBundle res;
ures_initStackObject(&res);
UResourceBundle *top = openOlsonResource(id, res, ec);
int32_t zone = -1;
if (U_SUCCESS(ec)) {
UResourceBundle r;
ures_initStackObject(&r);
int32_t size;
ures_getByKey(&res, kLINKS, &r, &ec);
const int32_t* v = ures_getIntVector(&r, &size, &ec);
if (U_SUCCESS(ec)) {
if (index >= 0 && index < size) {
zone = v[index];
}
}
ures_close(&r);
}
ures_close(&res);
if (zone >= 0) {
UResourceBundle *ares = ures_getByKey(top, kNAMES, NULL, &ec); // dereference Zones section
if (U_SUCCESS(ec)) {
int32_t idLen = 0;
const UChar* id = ures_getStringByIndex(ares, zone, &idLen, &ec);
result.fastCopyFrom(UnicodeString(TRUE, id, idLen));
U_DEBUG_TZ_MSG(("gei(%d) -> %d, len%d, %s\n", index, zone, result.length(), u_errorName(ec)));
}
ures_close(ares);
}
ures_close(top);
#if defined(U_DEBUG_TZ)
if(result.length() ==0) {
U_DEBUG_TZ_MSG(("equiv [__, #%d] -> 0 (%s)\n", index, u_errorName(ec)));
}
#endif
return result;
}
// ---------------------------------------
// These methods are used by ZoneMeta class only.
const UChar*
TimeZone::findID(const UnicodeString& id) {
const UChar *result = NULL;
UErrorCode ec = U_ZERO_ERROR;
UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
// resolve zone index by name
UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
int32_t idx = findInStringArray(names, id, ec);
result = ures_getStringByIndex(names, idx, NULL, &ec);
if (U_FAILURE(ec)) {
result = NULL;
}
ures_close(names);
ures_close(rb);
return result;
}
const UChar*
TimeZone::dereferOlsonLink(const UnicodeString& id) {
const UChar *result = NULL;
UErrorCode ec = U_ZERO_ERROR;
UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &ec);
// resolve zone index by name
UResourceBundle *names = ures_getByKey(rb, kNAMES, NULL, &ec);
int32_t idx = findInStringArray(names, id, ec);
result = ures_getStringByIndex(names, idx, NULL, &ec);
// open the zone bundle by index
ures_getByKey(rb, kZONES, rb, &ec);
ures_getByIndex(rb, idx, rb, &ec);
if (U_SUCCESS(ec)) {
if (ures_getType(rb) == URES_INT) {
// this is a link - dereference the link
int32_t deref = ures_getInt(rb, &ec);
const UChar* tmp = ures_getStringByIndex(names, deref, NULL, &ec);
if (U_SUCCESS(ec)) {
result = tmp;
}
}
}
ures_close(names);
ures_close(rb);
return result;
}
const UChar*
TimeZone::getRegion(const UnicodeString& id) {
UErrorCode status = U_ZERO_ERROR;
return getRegion(id, status);
}
const UChar*
TimeZone::getRegion(const UnicodeString& id, UErrorCode& status) {
if (U_FAILURE(status)) {
return NULL;
}
const UChar *result = NULL;
UResourceBundle *rb = ures_openDirect(NULL, kZONEINFO, &status);
// resolve zone index by name
UResourceBundle *res = ures_getByKey(rb, kNAMES, NULL, &status);
int32_t idx = findInStringArray(res, id, status);
// get region mapping
ures_getByKey(rb, kREGIONS, res, &status);
const UChar *tmp = ures_getStringByIndex(res, idx, NULL, &status);
if (U_SUCCESS(status)) {
result = tmp;
}
ures_close(res);
ures_close(rb);
return result;
}
// ---------------------------------------
int32_t
TimeZone::getRegion(const UnicodeString& id, char *region, int32_t capacity, UErrorCode& status)
{
int32_t resultLen = 0;
*region = 0;
if (U_FAILURE(status)) {
return 0;
}
const UChar *uregion = NULL;
// "Etc/Unknown" is not a system zone ID,
// but in the zone data
if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) != 0) {
uregion = getRegion(id);
}
if (uregion == NULL) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
resultLen = u_strlen(uregion);
// A region code is represented by invariant characters
u_UCharsToChars(uregion, region, uprv_min(resultLen, capacity));
if (capacity < resultLen) {
status = U_BUFFER_OVERFLOW_ERROR;
return resultLen;
}
return u_terminateChars(region, capacity, resultLen, &status);
}
// ---------------------------------------
UnicodeString&
TimeZone::getDisplayName(UnicodeString& result) const
{
return getDisplayName(FALSE,LONG,Locale::getDefault(), result);
}
UnicodeString&
TimeZone::getDisplayName(const Locale& locale, UnicodeString& result) const
{
return getDisplayName(FALSE, LONG, locale, result);
}
UnicodeString&
TimeZone::getDisplayName(UBool daylight, EDisplayType style, UnicodeString& result) const
{
return getDisplayName(daylight,style, Locale::getDefault(), result);
}
//--------------------------------------
int32_t
TimeZone::getDSTSavings()const {
if (useDaylightTime()) {
return 3600000;
}
return 0;
}
//---------------------------------------
UnicodeString&
TimeZone::getDisplayName(UBool daylight, EDisplayType style, const Locale& locale, UnicodeString& result) const
{
UErrorCode status = U_ZERO_ERROR;
UDate date = Calendar::getNow();
UTimeZoneFormatTimeType timeType;
int32_t offset;
if (style == GENERIC_LOCATION || style == LONG_GENERIC || style == SHORT_GENERIC) {
LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
if (U_FAILURE(status)) {
result.remove();
return result;
}
// Generic format
switch (style) {
case GENERIC_LOCATION:
tzfmt->format(UTZFMT_STYLE_GENERIC_LOCATION, *this, date, result, &timeType);
break;
case LONG_GENERIC:
tzfmt->format(UTZFMT_STYLE_GENERIC_LONG, *this, date, result, &timeType);
break;
case SHORT_GENERIC:
tzfmt->format(UTZFMT_STYLE_GENERIC_SHORT, *this, date, result, &timeType);
break;
default:
U_ASSERT(FALSE);
}
// Generic format many use Localized GMT as the final fallback.
// When Localized GMT format is used, the result might not be
// appropriate for the requested daylight value.
if ((daylight && timeType == UTZFMT_TIME_TYPE_STANDARD) || (!daylight && timeType == UTZFMT_TIME_TYPE_DAYLIGHT)) {
offset = daylight ? getRawOffset() + getDSTSavings() : getRawOffset();
if (style == SHORT_GENERIC) {
tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
} else {
tzfmt->formatOffsetLocalizedGMT(offset, result, status);
}
}
} else if (style == LONG_GMT || style == SHORT_GMT) {
LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
if (U_FAILURE(status)) {
result.remove();
return result;
}
offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
switch (style) {
case LONG_GMT:
tzfmt->formatOffsetLocalizedGMT(offset, result, status);
break;
case SHORT_GMT:
tzfmt->formatOffsetISO8601Basic(offset, FALSE, FALSE, FALSE, result, status);
break;
default:
U_ASSERT(FALSE);
}
} else {
U_ASSERT(style == LONG || style == SHORT || style == SHORT_COMMONLY_USED);
UTimeZoneNameType nameType = UTZNM_UNKNOWN;
switch (style) {
case LONG:
nameType = daylight ? UTZNM_LONG_DAYLIGHT : UTZNM_LONG_STANDARD;
break;
case SHORT:
case SHORT_COMMONLY_USED:
nameType = daylight ? UTZNM_SHORT_DAYLIGHT : UTZNM_SHORT_STANDARD;
break;
default:
U_ASSERT(FALSE);
}
LocalPointer<TimeZoneNames> tznames(TimeZoneNames::createInstance(locale, status));
if (U_FAILURE(status)) {
result.remove();
return result;
}
UnicodeString canonicalID(ZoneMeta::getCanonicalCLDRID(*this));
tznames->getDisplayName(canonicalID, nameType, date, result);
if (result.isEmpty()) {
// Fallback to localized GMT
LocalPointer<TimeZoneFormat> tzfmt(TimeZoneFormat::createInstance(locale, status));
offset = daylight && useDaylightTime() ? getRawOffset() + getDSTSavings() : getRawOffset();
if (style == LONG) {
tzfmt->formatOffsetLocalizedGMT(offset, result, status);
} else {
tzfmt->formatOffsetShortLocalizedGMT(offset, result, status);
}
}
}
if (U_FAILURE(status)) {
result.remove();
}
return result;
}
/**
* Parse a custom time zone identifier and return a corresponding zone.
* @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
* GMT[+-]hh.
* @return a newly created SimpleTimeZone with the given offset and
* no Daylight Savings Time, or null if the id cannot be parsed.
*/
TimeZone*
TimeZone::createCustomTimeZone(const UnicodeString& id)
{
int32_t sign, hour, min, sec;
if (parseCustomID(id, sign, hour, min, sec)) {
UnicodeString customID;
formatCustomID(hour, min, sec, (sign < 0), customID);
int32_t offset = sign * ((hour * 60 + min) * 60 + sec) * 1000;
return new SimpleTimeZone(offset, customID);
}
return NULL;
}
UnicodeString&
TimeZone::getCustomID(const UnicodeString& id, UnicodeString& normalized, UErrorCode& status) {
normalized.remove();
if (U_FAILURE(status)) {
return normalized;
}
int32_t sign, hour, min, sec;
if (parseCustomID(id, sign, hour, min, sec)) {
formatCustomID(hour, min, sec, (sign < 0), normalized);
}
return normalized;
}
UBool
TimeZone::parseCustomID(const UnicodeString& id, int32_t& sign,
int32_t& hour, int32_t& min, int32_t& sec) {
static const int32_t kParseFailed = -99999;
NumberFormat* numberFormat = 0;
UnicodeString idUppercase = id;
idUppercase.toUpper("");
if (id.length() > GMT_ID_LENGTH &&
idUppercase.startsWith(GMT_ID, GMT_ID_LENGTH))
{
ParsePosition pos(GMT_ID_LENGTH);
sign = 1;
hour = 0;
min = 0;
sec = 0;
if (id[pos.getIndex()] == MINUS /*'-'*/) {
sign = -1;
} else if (id[pos.getIndex()] != PLUS /*'+'*/) {
return FALSE;
}
pos.setIndex(pos.getIndex() + 1);
UErrorCode success = U_ZERO_ERROR;
numberFormat = NumberFormat::createInstance(success);
if(U_FAILURE(success)){
return FALSE;
}
numberFormat->setParseIntegerOnly(TRUE);
//numberFormat->setLenient(TRUE); // TODO: May need to set this, depends on latest timezone parsing
// Look for either hh:mm, hhmm, or hh
int32_t start = pos.getIndex();
Formattable n(kParseFailed);
numberFormat->parse(id, n, pos);
if (pos.getIndex() == start) {
delete numberFormat;
return FALSE;
}
hour = n.getLong();
if (pos.getIndex() < id.length()) {
if (pos.getIndex() - start > 2
|| id[pos.getIndex()] != COLON) {
delete numberFormat;
return FALSE;
}
// hh:mm
pos.setIndex(pos.getIndex() + 1);
int32_t oldPos = pos.getIndex();
n.setLong(kParseFailed);
numberFormat->parse(id, n, pos);
if ((pos.getIndex() - oldPos) != 2) {
// must be 2 digits
delete numberFormat;
return FALSE;
}
min = n.getLong();
if (pos.getIndex() < id.length()) {
if (id[pos.getIndex()] != COLON) {
delete numberFormat;
return FALSE;
}
// [:ss]
pos.setIndex(pos.getIndex() + 1);
oldPos = pos.getIndex();
n.setLong(kParseFailed);
numberFormat->parse(id, n, pos);
if (pos.getIndex() != id.length()
|| (pos.getIndex() - oldPos) != 2) {
delete numberFormat;
return FALSE;
}
sec = n.getLong();
}
} else {
// Supported formats are below -
//
// HHmmss
// Hmmss
// HHmm
// Hmm
// HH
// H
int32_t length = pos.getIndex() - start;
if (length <= 0 || 6 < length) {
// invalid length
delete numberFormat;
return FALSE;
}
switch (length) {
case 1:
case 2:
// already set to hour
break;
case 3:
case 4:
min = hour % 100;
hour /= 100;
break;
case 5:
case 6:
sec = hour % 100;
min = (hour/100) % 100;
hour /= 10000;
break;
}
}
delete numberFormat;
if (hour > kMAX_CUSTOM_HOUR || min > kMAX_CUSTOM_MIN || sec > kMAX_CUSTOM_SEC) {
return FALSE;
}
return TRUE;
}
return FALSE;
}
UnicodeString&
TimeZone::formatCustomID(int32_t hour, int32_t min, int32_t sec,
UBool negative, UnicodeString& id) {
// Create time zone ID - GMT[+|-]hhmm[ss]
id.setTo(GMT_ID, GMT_ID_LENGTH);
if (hour | min | sec) {
if (negative) {
id += (UChar)MINUS;
} else {
id += (UChar)PLUS;
}
if (hour < 10) {
id += (UChar)ZERO_DIGIT;
} else {
id += (UChar)(ZERO_DIGIT + hour/10);
}
id += (UChar)(ZERO_DIGIT + hour%10);
id += (UChar)COLON;
if (min < 10) {
id += (UChar)ZERO_DIGIT;
} else {
id += (UChar)(ZERO_DIGIT + min/10);
}
id += (UChar)(ZERO_DIGIT + min%10);
if (sec) {
id += (UChar)COLON;
if (sec < 10) {
id += (UChar)ZERO_DIGIT;
} else {
id += (UChar)(ZERO_DIGIT + sec/10);
}
id += (UChar)(ZERO_DIGIT + sec%10);
}
}
return id;
}
UBool
TimeZone::hasSameRules(const TimeZone& other) const
{
return (getRawOffset() == other.getRawOffset() &&
useDaylightTime() == other.useDaylightTime());
}
static void U_CALLCONV initTZDataVersion(UErrorCode &status) {
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
int32_t len = 0;
UResourceBundle *bundle = ures_openDirect(NULL, kZONEINFO, &status);
const UChar *tzver = ures_getStringByKey(bundle, kTZVERSION, &len, &status);
if (U_SUCCESS(status)) {
if (len >= (int32_t)sizeof(TZDATA_VERSION)) {
// Ensure that there is always space for a trailing nul in TZDATA_VERSION
len = sizeof(TZDATA_VERSION) - 1;
}
u_UCharsToChars(tzver, TZDATA_VERSION, len);
}
ures_close(bundle);
}
const char*
TimeZone::getTZDataVersion(UErrorCode& status)
{
umtx_initOnce(gTZDataVersionInitOnce, &initTZDataVersion, status);
return (const char*)TZDATA_VERSION;
}
UnicodeString&
TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UErrorCode& status)
{
UBool isSystemID = FALSE;
return getCanonicalID(id, canonicalID, isSystemID, status);
}
UnicodeString&
TimeZone::getCanonicalID(const UnicodeString& id, UnicodeString& canonicalID, UBool& isSystemID,
UErrorCode& status)
{
canonicalID.remove();
isSystemID = FALSE;
if (U_FAILURE(status)) {
return canonicalID;
}
if (id.compare(UNKNOWN_ZONE_ID, UNKNOWN_ZONE_ID_LENGTH) == 0) {
// special case - Etc/Unknown is a canonical ID, but not system ID
canonicalID.fastCopyFrom(id);
isSystemID = FALSE;
} else {
ZoneMeta::getCanonicalCLDRID(id, canonicalID, status);
if (U_SUCCESS(status)) {
isSystemID = TRUE;
} else {
// Not a system ID
status = U_ZERO_ERROR;
getCustomID(id, canonicalID, status);
}
}
return canonicalID;
}
#ifndef U_HIDE_DRAFT_API
UnicodeString&
TimeZone::getWindowsID(const UnicodeString& id, UnicodeString& winid, UErrorCode& status) {
winid.remove();
if (U_FAILURE(status)) {
return winid;
}
// canonicalize the input ID
UnicodeString canonicalID;
UBool isSystemID = FALSE;
getCanonicalID(id, canonicalID, isSystemID, status);
if (U_FAILURE(status) || !isSystemID) {
// mapping data is only applicable to tz database IDs
return winid;
}
UResourceBundle *mapTimezones = ures_openDirect(NULL, "windowsZones", &status);
ures_getByKey(mapTimezones, "mapTimezones", mapTimezones, &status);
if (U_FAILURE(status)) {
return winid;
}
UResourceBundle *winzone = NULL;
UBool found = FALSE;
while (ures_hasNext(mapTimezones) && !found) {
winzone = ures_getNextResource(mapTimezones, winzone, &status);
if (U_FAILURE(status)) {
break;
}
if (ures_getType(winzone) != URES_TABLE) {
continue;
}
UResourceBundle *regionalData = NULL;
while (ures_hasNext(winzone) && !found) {
regionalData = ures_getNextResource(winzone, regionalData, &status);
if (U_FAILURE(status)) {
break;
}
if (ures_getType(regionalData) != URES_STRING) {
continue;
}
int32_t len;
const UChar *tzids = ures_getString(regionalData, &len, &status);
if (U_FAILURE(status)) {
break;
}
const UChar *start = tzids;
UBool hasNext = TRUE;
while (hasNext) {
const UChar *end = u_strchr(start, (UChar)0x20);
if (end == NULL) {
end = tzids + len;
hasNext = FALSE;
}
if (canonicalID.compare(start, end - start) == 0) {
winid = UnicodeString(ures_getKey(winzone), -1 , US_INV);
found = TRUE;
break;
}
start = end + 1;
}
}
ures_close(regionalData);
}
ures_close(winzone);
ures_close(mapTimezones);
return winid;
}
#define MAX_WINDOWS_ID_SIZE 128
UnicodeString&
TimeZone::getIDForWindowsID(const UnicodeString& winid, const char* region, UnicodeString& id, UErrorCode& status) {
id.remove();
if (U_FAILURE(status)) {
return id;
}
UResourceBundle *zones = ures_openDirect(NULL, "windowsZones", &status);
ures_getByKey(zones, "mapTimezones", zones, &status);
if (U_FAILURE(status)) {
ures_close(zones);
return id;
}
UErrorCode tmperr = U_ZERO_ERROR;
char winidKey[MAX_WINDOWS_ID_SIZE];
int32_t winKeyLen = winid.extract(0, winid.length(), winidKey, sizeof(winidKey) - 1, US_INV);
if (winKeyLen == 0 || winKeyLen >= (int32_t)sizeof(winidKey)) {
ures_close(zones);
return id;
}
winidKey[winKeyLen] = 0;
ures_getByKey(zones, winidKey, zones, &tmperr); // use tmperr, because windows mapping might not
// be avaiable by design
if (U_FAILURE(tmperr)) {
ures_close(zones);
return id;
}
const UChar *tzid = NULL;
int32_t len = 0;
UBool gotID = FALSE;
if (region) {
const UChar *tzids = ures_getStringByKey(zones, region, &len, &tmperr); // use tmperr, because
// regional mapping is optional
if (U_SUCCESS(tmperr)) {
// first ID delimited by space is the defasult one
const UChar *end = u_strchr(tzids, (UChar)0x20);
if (end == NULL) {
id.setTo(tzids, -1);
} else {
id.setTo(tzids, end - tzids);
}
gotID = TRUE;
}
}
if (!gotID) {
tzid = ures_getStringByKey(zones, "001", &len, &status); // using status, because "001" must be
// available at this point
if (U_SUCCESS(status)) {
id.setTo(tzid, len);
}
}
ures_close(zones);
return id;
}
#endif /* U_HIDE_DRAFT_API */
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
//eof