void printTime(char* systime, char* icutime) {
printf("System Time: %s\n", systime);
printf("ICU Time: %s\n", icutime);
printf("STD=%s DST=%s OFFSET=%d\n", uprv_tzname(0), uprv_tzname(1), uprv_timezone());
}
void
TimeZone::initDefault()
{
// 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: Local mutex here. TimeZone mutex below
// mutexed to avoid threading issues in the platform functions.
// Some of the locale/timezone OS functions may not be thread safe,
// so the intent is that any setting from anywhere within ICU
// happens while the ICU mutex is held.
// The operating system might actually use ICU to implement timezones.
// So we may have ICU calling ICU here, like on AIX.
// In order to prevent a double lock of a non-reentrant mutex in a
// different part of ICU, we use TZSET_LOCK to allow only one instance
// of ICU to query these thread unsafe OS functions at any given time.
Mutex lock(&TZSET_LOCK);
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
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;
}
UBool initialized;
UMTX_CHECK(&LOCK, (DEFAULT_ZONE != NULL), initialized);
if (initialized) {
/* Hrmph? Either a race condition happened, or tzset initialized ICU. */
return;
}
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);
#ifdef U_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 = getGMT();
// If we can't use GMT, get out.
if (temptz == NULL) {
return;
}
default_zone = temptz->clone();
}
// If DEFAULT_ZONE is still NULL, set it up.
umtx_lock(&LOCK);
if (DEFAULT_ZONE == NULL) {
DEFAULT_ZONE = default_zone;
default_zone = NULL;
ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
}
umtx_unlock(&LOCK);
delete default_zone;
}
static void TestPUtilAPI(void){
double n1=0.0, y1=0.0, expn1, expy1;
double value1 = 0.021;
UVersionInfo versionArray = {0x01, 0x00, 0x02, 0x02};
char versionString[17]; /* xxx.xxx.xxx.xxx\0 */
char *str=0;
UBool isTrue=FALSE;
log_verbose("Testing the API uprv_modf()\n");
y1 = uprv_modf(value1, &n1);
expn1=0;
expy1=0.021;
if(y1 != expy1 || n1 != expn1){
log_err("Error in uprv_modf. Expected IntegralValue=%f, Got=%f, \n Expected FractionalValue=%f, Got=%f\n",
expn1, n1, expy1, y1);
}
if(VERBOSITY){
log_verbose("[float] x = %f n = %f y = %f\n", value1, n1, y1);
}
log_verbose("Testing the API uprv_fmod()\n");
expn1=uprv_fmod(30.50, 15.00);
doAssert(expn1, 0.5, "uprv_fmod(30.50, 15.00) failed.");
log_verbose("Testing the API uprv_ceil()\n");
expn1=uprv_ceil(value1);
doAssert(expn1, 1, "uprv_ceil(0.021) failed.");
log_verbose("Testing the API uprv_floor()\n");
expn1=uprv_floor(value1);
doAssert(expn1, 0, "uprv_floor(0.021) failed.");
log_verbose("Testing the API uprv_fabs()\n");
expn1=uprv_fabs((2.02-1.345));
doAssert(expn1, 0.675, "uprv_fabs(2.02-1.345) failed.");
log_verbose("Testing the API uprv_fmax()\n");
doAssert(uprv_fmax(2.4, 1.2), 2.4, "uprv_fmax(2.4, 1.2) failed.");
log_verbose("Testing the API uprv_fmax() with x value= NaN\n");
expn1=uprv_fmax(uprv_getNaN(), 1.2);
doAssert(expn1, uprv_getNaN(), "uprv_fmax(uprv_getNaN(), 1.2) failed. when one parameter is NaN");
log_verbose("Testing the API uprv_fmin()\n");
doAssert(uprv_fmin(2.4, 1.2), 1.2, "uprv_fmin(2.4, 1.2) failed.");
log_verbose("Testing the API uprv_fmin() with x value= NaN\n");
expn1=uprv_fmin(uprv_getNaN(), 1.2);
doAssert(expn1, uprv_getNaN(), "uprv_fmin(uprv_getNaN(), 1.2) failed. when one parameter is NaN");
log_verbose("Testing the API uprv_max()\n");
doAssert(uprv_max(4, 2), 4, "uprv_max(4, 2) failed.");
log_verbose("Testing the API uprv_min()\n");
doAssert(uprv_min(-4, 2), -4, "uprv_min(-4, 2) failed.");
log_verbose("Testing the API uprv_trunc()\n");
doAssert(uprv_trunc(12.3456), 12, "uprv_trunc(12.3456) failed.");
doAssert(uprv_trunc(12.234E2), 1223, "uprv_trunc(12.234E2) failed.");
doAssert(uprv_trunc(uprv_getNaN()), uprv_getNaN(), "uprv_trunc(uprv_getNaN()) failed. with parameter=NaN");
doAssert(uprv_trunc(uprv_getInfinity()), uprv_getInfinity(), "uprv_trunc(uprv_getInfinity()) failed. with parameter=Infinity");
log_verbose("Testing the API uprv_pow10()\n");
doAssert(uprv_pow10(4), 10000, "uprv_pow10(4) failed.");
log_verbose("Testing the API uprv_log10()\n");
doAssert(uprv_log10(3456), 3, "uprv_log10(3456) failed.");
#ifdef OS390
doAssert(uprv_log10(1.0e55), 55, "uprv_log10(1.0e55) failed.");
#else
doAssert(uprv_log10(1.0e300), 300, "uprv_log10(1.0e300) failed.");
#endif
log_verbose("Testing the API uprv_isNegativeInfinity()\n");
isTrue=uprv_isNegativeInfinity(uprv_getInfinity() * -1);
if(isTrue != TRUE){
log_err("ERROR: uprv_isNegativeInfinity failed.\n");
}
log_verbose("Testing the API uprv_isPositiveInfinity()\n");
isTrue=uprv_isPositiveInfinity(uprv_getInfinity());
if(isTrue != TRUE){
log_err("ERROR: uprv_isPositiveInfinity failed.\n");
}
log_verbose("Testing the API uprv_isInfinite()\n");
isTrue=uprv_isInfinite(uprv_getInfinity());
if(isTrue != TRUE){
log_err("ERROR: uprv_isInfinite failed.\n");
}
#if 0
log_verbose("Testing the API uprv_digitsAfterDecimal()....\n");
doAssert(uprv_digitsAfterDecimal(value1), 3, "uprv_digitsAfterDecimal() failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E2), 2, "uprv_digitsAfterDecimal(1.2345E2) failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E-2), 6, "uprv_digitsAfterDecimal(1.2345E-2) failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E2), 2, "uprv_digitsAfterDecimal(1.2345E2) failed.");
doAssert(uprv_digitsAfterDecimal(-1.2345E-20), 24, "uprv_digitsAfterDecimal(1.2345E-20) failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E20), 0, "uprv_digitsAfterDecimal(1.2345E20) failed.");
doAssert(uprv_digitsAfterDecimal(-0.021), 3, "uprv_digitsAfterDecimal(-0.021) failed.");
doAssert(uprv_digitsAfterDecimal(23.0), 0, "uprv_digitsAfterDecimal(23.0) failed.");
doAssert(uprv_digitsAfterDecimal(0.022223333321), 9, "uprv_digitsAfterDecimal(0.022223333321) failed.");
#endif
log_verbose("Testing the API u_versionToString().....\n");
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "1.0.2.2") != 0){
log_err("ERROR: u_versionToString() failed. Expected: 1.0.2.2, Got=%s\n", versionString);
}
log_verbose("Testing the API u_versionToString().....with versionArray=NULL\n");
u_versionToString(NULL, versionString);
if(strcmp(versionString, "") != 0){
log_err("ERROR: u_versionToString() failed. with versionArray=NULL. It should just return\n");
}
log_verbose("Testing the API u_versionToString().....with versionArray=NULL\n");
u_versionToString(NULL, versionString);
if(strcmp(versionString, "") != 0){
log_err("ERROR: u_versionToString() failed . It should just return\n");
}
log_verbose("Testing the API u_versionToString().....with versionString=NULL\n");
u_versionToString(versionArray, NULL);
if(strcmp(versionString, "") != 0){
log_err("ERROR: u_versionToString() failed. with versionArray=NULL It should just return\n");
}
versionArray[0] = 0x0a;
log_verbose("Testing the API u_versionToString().....\n");
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "10.0.2.2") != 0){
log_err("ERROR: u_versionToString() failed. Expected: 10.0.2.2, Got=%s\n", versionString);
}
versionArray[0] = 0xa0;
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "160.0.2.2") != 0){
log_err("ERROR: u_versionToString() failed. Expected: 160.0.2.2, Got=%s\n", versionString);
}
versionArray[0] = 0xa0;
versionArray[1] = 0xa0;
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "160.160.2.2") != 0){
log_err("ERROR: u_versionToString() failed. Expected: 160.160.2.2, Got=%s\n", versionString);
}
versionArray[0] = 0x01;
versionArray[1] = 0x0a;
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "1.10.2.2") != 0){
log_err("ERROR: u_versionToString() failed. Expected: 160.160.2.2, Got=%s\n", versionString);
}
log_verbose("Testing the API u_versionFromString() ....\n");
u_versionFromString(versionArray, "1.3.5.6");
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "1.3.5.6") != 0){
log_err("ERROR: u_getVersion() failed. Expected: 1.3.5.6, Got=%s\n", versionString);
}
log_verbose("Testing the API u_versionFromString() where versionArray=NULL....\n");
u_versionFromString(NULL, "1.3.5.6");
u_versionToString(versionArray, versionString);
if(strcmp(versionString, "1.3.5.6") != 0){
log_err("ERROR: u_getVersion() failed. Expected: 1.3.5.6, Got=%s\n", versionString);
}
log_verbose("Testing the API u_getVersion().....\n");
u_getVersion(versionArray);
u_versionToString(versionArray, versionString);
if(strcmp(versionString, U_ICU_VERSION) != 0){
log_err("ERROR: u_getVersion() failed. Got=%s, expected %s\n", versionString, U_ICU_VERSION);
}
log_verbose("Testing the API u_errorName()...\n");
str=(char*)u_errorName((UErrorCode)0);
if(strcmp(str, "U_ZERO_ERROR") != 0){
log_err("ERROR: u_getVersion() failed. Expected: U_ZERO_ERROR Got=%s\n", str);
}
log_verbose("Testing the API u_errorName()...\n");
str=(char*)u_errorName((UErrorCode)-127);
if(strcmp(str, "U_USING_DEFAULT_WARNING") != 0){
log_err("ERROR: u_getVersion() failed. Expected: U_USING_DEFAULT_WARNING Got=%s\n", str);
}
log_verbose("Testing the API u_errorName().. with BOGUS ERRORCODE...\n");
str=(char*)u_errorName((UErrorCode)200);
if(strcmp(str, "[BOGUS UErrorCode]") != 0){
log_err("ERROR: u_getVersion() failed. Expected: [BOGUS UErrorCode] Got=%s\n", str);
}
{
const char* dataDirectory;
UChar *udataDir=0;
UChar temp[100];
char *charvalue=0;
log_verbose("Testing chars to UChars\n");
/* This cannot really work on a japanese system. u_uastrcpy will have different results than */
/* u_charsToUChars when there is a backslash in the string! */
/*dataDirectory=u_getDataDirectory();*/
dataDirectory="directory1"; /*no backslashes*/
udataDir=(UChar*)malloc(sizeof(UChar) * (strlen(dataDirectory) + 1));
u_charsToUChars(dataDirectory, udataDir, (strlen(dataDirectory)+1));
u_uastrcpy(temp, dataDirectory);
if(u_strcmp(temp, udataDir) != 0){
log_err("ERROR: u_charsToUChars failed. Expected %s, Got %s\n", austrdup(temp), austrdup(udataDir));
}
log_verbose("Testing UChars to chars\n");
charvalue=(char*)malloc(sizeof(char) * (u_strlen(udataDir) + 1));
u_UCharsToChars(udataDir, charvalue, (u_strlen(udataDir)+1));
if(strcmp(charvalue, dataDirectory) != 0){
log_err("ERROR: u_UCharsToChars failed. Expected %s, Got %s\n", charvalue, dataDirectory);
}
free(charvalue);
free(udataDir);
}
log_verbose("Testing uprv_timezone()....\n");
{
int32_t tzoffset = uprv_timezone();
log_verbose("Value returned from uprv_timezone = %d\n", tzoffset);
if (tzoffset != 28800) {
log_verbose("***** WARNING: If testing in the PST timezone, t_timezone should return 28800! *****");
}
if ((tzoffset % 1800 != 0)) {
log_err("FAIL: t_timezone may be incorrect. It is not a multiple of 30min.");
}
tzoffset=uprv_getUTCtime();
}
}
static void TestPUtilAPI(void){
double n1=0.0, y1=0.0, expn1, expy1;
double value1 = 0.021;
char *str=0;
UBool isTrue=FALSE;
log_verbose("Testing the API uprv_modf()\n");
y1 = uprv_modf(value1, &n1);
expn1=0;
expy1=0.021;
if(y1 != expy1 || n1 != expn1){
log_err("Error in uprv_modf. Expected IntegralValue=%f, Got=%f, \n Expected FractionalValue=%f, Got=%f\n",
expn1, n1, expy1, y1);
}
if(getTestOption(VERBOSITY_OPTION)){
log_verbose("[float] x = %f n = %f y = %f\n", value1, n1, y1);
}
log_verbose("Testing the API uprv_fmod()\n");
expn1=uprv_fmod(30.50, 15.00);
doAssert(expn1, 0.5, "uprv_fmod(30.50, 15.00) failed.");
log_verbose("Testing the API uprv_ceil()\n");
expn1=uprv_ceil(value1);
doAssert(expn1, 1, "uprv_ceil(0.021) failed.");
log_verbose("Testing the API uprv_floor()\n");
expn1=uprv_floor(value1);
doAssert(expn1, 0, "uprv_floor(0.021) failed.");
log_verbose("Testing the API uprv_fabs()\n");
expn1=uprv_fabs((2.02-1.345));
doAssert(expn1, 0.675, "uprv_fabs(2.02-1.345) failed.");
log_verbose("Testing the API uprv_fmax()\n");
doAssert(uprv_fmax(2.4, 1.2), 2.4, "uprv_fmax(2.4, 1.2) failed.");
log_verbose("Testing the API uprv_fmax() with x value= NaN\n");
expn1=uprv_fmax(uprv_getNaN(), 1.2);
doAssert(expn1, uprv_getNaN(), "uprv_fmax(uprv_getNaN(), 1.2) failed. when one parameter is NaN");
log_verbose("Testing the API uprv_fmin()\n");
doAssert(uprv_fmin(2.4, 1.2), 1.2, "uprv_fmin(2.4, 1.2) failed.");
log_verbose("Testing the API uprv_fmin() with x value= NaN\n");
expn1=uprv_fmin(uprv_getNaN(), 1.2);
doAssert(expn1, uprv_getNaN(), "uprv_fmin(uprv_getNaN(), 1.2) failed. when one parameter is NaN");
log_verbose("Testing the API uprv_max()\n");
doAssert(uprv_max(4, 2), 4, "uprv_max(4, 2) failed.");
log_verbose("Testing the API uprv_min()\n");
doAssert(uprv_min(-4, 2), -4, "uprv_min(-4, 2) failed.");
log_verbose("Testing the API uprv_trunc()\n");
doAssert(uprv_trunc(12.3456), 12, "uprv_trunc(12.3456) failed.");
doAssert(uprv_trunc(12.234E2), 1223, "uprv_trunc(12.234E2) failed.");
doAssert(uprv_trunc(uprv_getNaN()), uprv_getNaN(), "uprv_trunc(uprv_getNaN()) failed. with parameter=NaN");
doAssert(uprv_trunc(uprv_getInfinity()), uprv_getInfinity(), "uprv_trunc(uprv_getInfinity()) failed. with parameter=Infinity");
log_verbose("Testing the API uprv_pow10()\n");
doAssert(uprv_pow10(4), 10000, "uprv_pow10(4) failed.");
log_verbose("Testing the API uprv_isNegativeInfinity()\n");
isTrue=uprv_isNegativeInfinity(uprv_getInfinity() * -1);
if(isTrue != TRUE){
log_err("ERROR: uprv_isNegativeInfinity failed.\n");
}
log_verbose("Testing the API uprv_isPositiveInfinity()\n");
isTrue=uprv_isPositiveInfinity(uprv_getInfinity());
if(isTrue != TRUE){
log_err("ERROR: uprv_isPositiveInfinity failed.\n");
}
log_verbose("Testing the API uprv_isInfinite()\n");
isTrue=uprv_isInfinite(uprv_getInfinity());
if(isTrue != TRUE){
log_err("ERROR: uprv_isInfinite failed.\n");
}
#if 0
log_verbose("Testing the API uprv_digitsAfterDecimal()....\n");
doAssert(uprv_digitsAfterDecimal(value1), 3, "uprv_digitsAfterDecimal() failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E2), 2, "uprv_digitsAfterDecimal(1.2345E2) failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E-2), 6, "uprv_digitsAfterDecimal(1.2345E-2) failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E2), 2, "uprv_digitsAfterDecimal(1.2345E2) failed.");
doAssert(uprv_digitsAfterDecimal(-1.2345E-20), 24, "uprv_digitsAfterDecimal(1.2345E-20) failed.");
doAssert(uprv_digitsAfterDecimal(1.2345E20), 0, "uprv_digitsAfterDecimal(1.2345E20) failed.");
doAssert(uprv_digitsAfterDecimal(-0.021), 3, "uprv_digitsAfterDecimal(-0.021) failed.");
doAssert(uprv_digitsAfterDecimal(23.0), 0, "uprv_digitsAfterDecimal(23.0) failed.");
doAssert(uprv_digitsAfterDecimal(0.022223333321), 9, "uprv_digitsAfterDecimal(0.022223333321) failed.");
#endif
log_verbose("Testing the API u_errorName()...\n");
str=(char*)u_errorName((UErrorCode)0);
if(strcmp(str, "U_ZERO_ERROR") != 0){
log_err("ERROR: u_getVersion() failed. Expected: U_ZERO_ERROR Got=%s\n", str);
}
log_verbose("Testing the API u_errorName()...\n");
str=(char*)u_errorName((UErrorCode)-127);
if(strcmp(str, "U_USING_DEFAULT_WARNING") != 0){
log_err("ERROR: u_getVersion() failed. Expected: U_USING_DEFAULT_WARNING Got=%s\n", str);
}
log_verbose("Testing the API u_errorName().. with BOGUS ERRORCODE...\n");
str=(char*)u_errorName((UErrorCode)200);
if(strcmp(str, "[BOGUS UErrorCode]") != 0){
log_err("ERROR: u_getVersion() failed. Expected: [BOGUS UErrorCode] Got=%s\n", str);
}
{
const char* dataDirectory;
int32_t dataDirectoryLen;
UChar *udataDir=0;
UChar temp[100];
char *charvalue=0;
log_verbose("Testing chars to UChars\n");
/* This cannot really work on a japanese system. u_uastrcpy will have different results than */
/* u_charsToUChars when there is a backslash in the string! */
/*dataDirectory=u_getDataDirectory();*/
dataDirectory="directory1"; /*no backslashes*/
dataDirectoryLen=(int32_t)strlen(dataDirectory);
udataDir=(UChar*)malloc(sizeof(UChar) * (dataDirectoryLen + 1));
u_charsToUChars(dataDirectory, udataDir, (dataDirectoryLen + 1));
u_uastrcpy(temp, dataDirectory);
if(u_strcmp(temp, udataDir) != 0){
log_err("ERROR: u_charsToUChars failed. Expected %s, Got %s\n", austrdup(temp), austrdup(udataDir));
}
log_verbose("Testing UChars to chars\n");
charvalue=(char*)malloc(sizeof(char) * (u_strlen(udataDir) + 1));
u_UCharsToChars(udataDir, charvalue, (u_strlen(udataDir)+1));
if(strcmp(charvalue, dataDirectory) != 0){
log_err("ERROR: u_UCharsToChars failed. Expected %s, Got %s\n", charvalue, dataDirectory);
}
free(charvalue);
free(udataDir);
}
log_verbose("Testing uprv_timezone()....\n");
{
int32_t tzoffset = uprv_timezone();
log_verbose("Value returned from uprv_timezone = %d\n", tzoffset);
if (tzoffset != 28800) {
log_verbose("***** WARNING: If testing in the PST timezone, t_timezone should return 28800! *****");
}
if ((tzoffset % 1800 != 0)) {
log_info("Note: t_timezone offset of %ld (for %s : %s) is not a multiple of 30min.", tzoffset, uprv_tzname(0), uprv_tzname(1));
}
/*tzoffset=uprv_getUTCtime();*/
}
}
/**
* Initialize DEFAULT_ZONE from the system default time zone. The
* caller should confirm that DEFAULT_ZONE is NULL before calling.
* Upon return, DEFAULT_ZONE will not be NULL, unless operator new()
* returns NULL.
*
* Must be called OUTSIDE mutex.
*/
void
TimeZone::initDefault()
{
// 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: Global mutex here; TimeZone mutex above
// mutexed to avoid threading issues in the platform fcns.
// Some of the locale/timezone OS functions may not be thread safe,
// so the intent is that any setting from anywhere within ICU
// happens with the ICU global mutex held.
Mutex lock;
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;
if (haveZoneData()) {
default_zone = createSystemTimeZone(hostID);
// If we couldn't get the time zone ID from the host, use
// the default host timezone offset. Further refinements
// to this include querying the host to determine if DST
// is in use or not and possibly using the host locale to
// select from multiple zones at a the same offset. We
// don't do any of this now, but we could easily add this.
if (default_zone == NULL) {
// Use the designated default in the time zone list that has the
// appropriate GMT offset, if there is one.
const OffsetIndex* index = INDEX_BY_OFFSET;
for (;;) {
if (index->gmtOffset > rawOffset) {
// Went past our desired offset; no match found
break;
}
if (index->gmtOffset == rawOffset) {
// Found our desired offset
default_zone = createSystemTimeZone(ZONE_IDS[index->defaultZone]);
break;
}
// Compute the position of the next entry. If the delta value
// in this entry is zero, then there is no next entry.
uint16_t delta = index->nextEntryDelta;
if (delta == 0) {
break;
}
index = (const OffsetIndex*)((int8_t*)index + delta);
}
}
}
// If we _still_ don't have a time zone, use GMT. This
// can only happen if the raw offset returned by
// uprv_timezone() does not correspond to any system zone.
if (default_zone == NULL) {
default_zone = getGMT()->clone();
}
// If DEFAULT_ZONE is still NULL, set it up.
umtx_lock(&LOCK);
if (DEFAULT_ZONE == NULL) {
DEFAULT_ZONE = default_zone;
default_zone = NULL;
}
umtx_unlock(&LOCK);
delete default_zone;
}