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; }