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Proper daylight savings time check

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This commit is contained in:
wheremyfoodat
2023-07-02 01:00:57 +03:00
parent 117c6dfb97
commit 8930d44f5d
1 changed files with 5 additions and 4 deletions
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9
src/core/memory.cpp
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@@ -428,7 +428,7 @@ u64 Memory::timeSince3DSEpoch() {
std::time_t rawTime = std::time(nullptr); // Get current UTC time
auto localTime = std::localtime(&rawTime); // Convert to local time
bool daylightSavings = localTime->tm_isdst; // Get if time includes DST
bool daylightSavings = localTime->tm_isdst > 0; // Get if time includes DST
localTime = std::gmtime(&rawTime);
// Use gmtime + mktime to calculate difference between local time and UTC
@@ -437,7 +437,8 @@ u64 Memory::timeSince3DSEpoch() {
timezoneDifference += 60ull * 60ull; // Add 1 hour (60 seconds * 60 minutes)
}
milliseconds ms = duration_cast<milliseconds>(seconds(rawTime + timezoneDifference));
constexpr u64 offset = 2208988800ull * 1000;
return ms.count() + offset;
// seconds between Jan 1 1900 and Jan 1 1970
constexpr u64 offset = 2208988800ull;
milliseconds ms = duration_cast<milliseconds>(seconds(rawTime + timezoneDifference + offset));
return ms.count();
}