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Fixes timezone bias on Windows

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`GetTimeZoneInformation`returns the bias in minutes already, so no need to adjust it.

Also handle the return code since it determines if the time zone is in the daylight saving range.

Ref: https://learn.microsoft.com/en-us/windows/win32/api/timezoneapi/nf-timezoneapi-gettimezoneinformation
Fixes: https://github.com/saghul/txiki.js/issues/325
This commit is contained in:
Saúl Ibarra Corretgé 2024-12-09 22:32:32 +01:00
parent 66732e78ef
commit 53b641d4b3
1 changed files with 8 additions and 3 deletions
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11
quickjs.c
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@ -43386,9 +43386,14 @@ static const JSCFunctionListEntry js_math_obj[] = {
between UTC time and local time 'd' in minutes */
static int getTimezoneOffset(int64_t time) {
#if defined(_WIN32)
TIME_ZONE_INFORMATION time_zone_info;
GetTimeZoneInformation(&time_zone_info);
return (int)time_zone_info.Bias / 60;
DWORD r;
TIME_ZONE_INFORMATION t;
r = GetTimeZoneInformation(&t);
if (r == TIME_ZONE_ID_INVALID)
return 0;
if (r == TIME_ZONE_ID_DAYLIGHT)
return (int)(t.Bias + t.DaylightBias);
return (int)t.Bias;
#else
time_t ti;
struct tm tm;