70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define _DEFAULT_SOURCE
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#include "os.h"
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// #include "ulog.h"
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// #include "tglobal.h"
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// #include "tutil.h"
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// TODO refactor to set the tz value through parameter
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void tsSetTimeZone() {
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#if 0
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SGlobalCfg *cfg_timezone = taosGetConfigOption("timezone");
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if (cfg_timezone != NULL) {
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uInfo("timezone is set to %s by %s", tsTimezone, tsCfgStatusStr[cfg_timezone->cfgStatus]);
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}
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#ifdef WINDOWS
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char winStr[TSDB_LOCALE_LEN * 2];
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sprintf(winStr, "TZ=%s", tsTimezone);
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putenv(winStr);
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#else
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setenv("TZ", tsTimezone, 1);
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#endif
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tzset();
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/*
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* get CURRENT time zone.
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* system current time zone is affected by daylight saving time(DST)
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*
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* e.g., the local time zone of London in DST is GMT+01:00,
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* otherwise is GMT+00:00
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*/
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#ifdef _MSC_VER
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#if _MSC_VER >= 1900
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// see https://docs.microsoft.com/en-us/cpp/c-runtime-library/daylight-dstbias-timezone-and-tzname?view=vs-2019
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int64_t timezone = _timezone;
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int32_t daylight = _daylight;
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char **tzname = _tzname;
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#endif
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#endif
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int32_t tz = (int32_t)((-timezone * MILLISECOND_PER_SECOND) / MILLISECOND_PER_HOUR);
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tz += daylight;
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/*
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* format:
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* (CST, +0800)
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* (BST, +0100)
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*/
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sprintf(tsTimezone, "(%s, %s%02d00)", tzname[daylight], tz >= 0 ? "+" : "-", abs(tz));
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tsDaylight = daylight;
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uInfo("timezone format changed to %s", tsTimezone);
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#endif
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}
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