GuessedTimeZone() {
time_t the_time = time(0);
struct tm tmbuf;
struct tm *ta = localtime_r(&the_time, &tmbuf);
const char *tzid = nullptr;
if (ta) {
tzid = timelib_timezone_id_from_abbr(ta->tm_zone, ta->tm_gmtoff,
ta->tm_isdst);
}
if (!tzid) {
tzid = "UTC";
}
m_tzid = tzid;
#define DATE_TZ_ERRMSG \
"It is not safe to rely on the system's timezone settings. Please use " \
"the date.timezone setting, the TZ environment variable or the " \
"date_default_timezone_set() function. In case you used any of those " \
"methods and you are still getting this warning, you most likely " \
"misspelled the timezone identifier. "
string_printf(m_warning, DATE_TZ_ERRMSG
"We selected '%s' for '%s/%.1f/%s' instead",
tzid, ta ? ta->tm_zone : "Unknown",
ta ? (float) (ta->tm_gmtoff / 3600) : 0,
ta ? (ta->tm_isdst ? "DST" : "no DST") : "Unknown");
}
timelib_tzinfo* TimeZone::GetTimeZoneInfoRaw(char* name,
const timelib_tzdb* db) {
auto const it = s_tzCache->find(name);
if (it != s_tzCache->end()) {
return it->second;
}
auto tzi = timelib_parse_tzfile(name, db);
if (!tzi) {
char* tzid = timelib_timezone_id_from_abbr(name, -1, 0);
if (tzid) {
tzi = timelib_parse_tzfile(tzid, db);
}
}
if (tzi) {
auto key = strdup(name);
auto result = s_tzCache->insert(TimeZoneCacheEntry(key, tzi));
if (!result.second) {
// The cache should never fill up since tzinfos are finite.
always_assert(result.first != s_tzCache->end());
// A collision occurred, so we don't need our strdup'ed key.
free(key);
timelib_tzinfo_dtor(tzi);
tzi = result.first->second;
}
}
return tzi;
}
String TimeZone::CurrentName() {
/* Checking configure timezone */
String timezone = g_context->getTimeZone();
if (!timezone.empty()) {
return timezone;
}
/* Check environment variable */
char *env = getenv("TZ");
if (env && *env && IsValid(env)) {
return String(env, CopyString);
}
/* Check config setting for default timezone */
String default_timezone = g_context->getDefaultTimeZone();
if (!default_timezone.empty() && IsValid(default_timezone.data())) {
return default_timezone;
}
/* Try to guess timezone from system information */
time_t the_time = time(0);
struct tm tmbuf;
struct tm *ta = localtime_r(&the_time, &tmbuf);
const char *tzid = NULL;
if (ta) {
tzid = timelib_timezone_id_from_abbr(ta->tm_zone, ta->tm_gmtoff,
ta->tm_isdst);
}
if (!tzid) {
tzid = "UTC";
}
return String(tzid, CopyString);
}
String TimeZone::AbbreviationToName(String abbr, int utcoffset /* = -1 */,
int isdst /* = 1 */) {
if (isdst != 0 && isdst != 1) {
isdst = -1;
}
return String(timelib_timezone_id_from_abbr(abbr.data(), utcoffset,
isdst),
CopyString);
}
GuessedTimeZone() {
time_t the_time = time(0);
struct tm tmbuf;
struct tm *ta = localtime_r(&the_time, &tmbuf);
const char *tzid = nullptr;
#ifndef _MSC_VER
// TODO: Fixme under MSVC!
if (ta) {
tzid = timelib_timezone_id_from_abbr(ta->tm_zone, ta->tm_gmtoff,
ta->tm_isdst);
}
#endif
if (!tzid) {
tzid = "UTC";
}
m_tzid = tzid;
}
String TimeZone::AbbreviationToName(String abbr, int utcoffset /* = -1 */,
bool isdst /* = true */) {
return String(timelib_timezone_id_from_abbr(abbr.data(), utcoffset,
isdst ? -1 : 0),
CopyString);
}
