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LibCore: Set tm_isdst to a negative value before invoking mktime

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If it is default-initialized to 0, mktime will assume that DST is not in
effect for the specified time. Setting it to a negative value instructs
mktime to determine for itself whether DST is in effect.
This commit is contained in:
Timothy Flynn 2023-03-21 11:16:26 -04:00 • committed by Linus Groh
parent 19302a471d
commit 8a27180fb8
1 changed files with 3 additions and 0 deletions
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3
Userland/Libraries/LibCore/DateTime.cpp
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@ -280,7 +280,9 @@ Optional<DateTime> DateTime::parse(StringView format, DeprecatedString const& st
{ {
unsigned format_pos = 0; unsigned format_pos = 0;
unsigned string_pos = 0; unsigned string_pos = 0;
struct tm tm = {}; struct tm tm = {};
tm.tm_isdst = -1;
auto parsing_failed = false; auto parsing_failed = false;
auto tm_represents_utc_time = false; auto tm_represents_utc_time = false;
@ -549,4 +551,5 @@ Optional<DateTime> DateTime::parse(StringView format, DeprecatedString const& st
return DateTime::from_timestamp(mktime(&tm)); return DateTime::from_timestamp(mktime(&tm));
} }
} }