Line data    Source code

       1             : // Copyright 2017 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include <cmath>
       6             : 
       7             : #include "src/base/platform/platform-posix-time.h"
       8             : 
       9             : namespace v8 {
      10             : namespace base {
      11             : 
      12         118 : const char* PosixDefaultTimezoneCache::LocalTimezone(double time) {
      13         118 :   if (std::isnan(time)) return "";
      14         118 :   time_t tv = static_cast<time_t>(std::floor(time / msPerSecond));
      15             :   struct tm tm;
      16         118 :   struct tm* t = localtime_r(&tv, &tm);
      17         118 :   if (!t || !t->tm_zone) return "";
      18         118 :   return t->tm_zone;
      19             : }
      20             : 
      21         169 : double PosixDefaultTimezoneCache::LocalTimeOffset() {
      22         169 :   time_t tv = time(nullptr);
      23             :   struct tm tm;
      24         169 :   struct tm* t = localtime_r(&tv, &tm);
      25             :   // tm_gmtoff includes any daylight savings offset, so subtract it.
      26         338 :   return static_cast<double>(t->tm_gmtoff * msPerSecond -
      27         338 :                              (t->tm_isdst > 0 ? 3600 * msPerSecond : 0));
      28             : }
      29             : 
      30             : }  // namespace base
      31             : }  // namespace v8