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.
Having an alias function that only wraps another one is silly, and
keeping the more obvious name should flush out more uses of deprecated
strings.
No behavior change.
When we encounter an explicit timezone, we shift the time to UTC.
Because we rely on `mktime`, we need to shift it to the local time
before proceeding. If no explicit timezone is provided, local timezone
is assumed.
This fixes the "timezone-offset extension" LibJS test running on
machines with a non-UTC timezone offset.
Co-authored-by: Timothy Flynn <trflynn89@pm.me>
This will make it easier to support both string types at the same time
while we convert code, and tracking down remaining uses.
One big exception is Value::to_string() in LibJS, where the name is
dictated by the ToString AO.
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
Previously, we were incorrectly assuming that the daylight global
variable indicated whether the current time zone is in DST. In reality,
the daylight variable only indicates whether a time zone *can* be in
DST.
Instead, the tm structure has a tm_isdst member that should be used for
this purpose. Ensure our LibC handles tm_isdst, and avoid errant usage
of the daylight variable in Core::DateTime.
Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
This commit moves the length calculations out to be directly on the
StringView users. This is an important step towards the goal of removing
StringView(char const*), as it moves the responsibility of calculating
the size of the string to the user of the StringView (which will prevent
naive uses causing OOB access).
While working on #13764 I noticed that DateTime::to_string() would just
return an empty String if the format included an invalid specifier
(eg `%Q`). This seems to be a mistake. POSIX date(1), which I believe
we are basing our implementation on, only replaces valid specifiers,
and any invalid ones get included as literals in the output.
For example, on Linux `date "+%Quiz"` returns "%Quiz", but we were
returning "".
Day and month name constants are defined in numerous places. This
pulls them together into a single place and eliminates the
duplication. It also ensures they are `constexpr`.
Also use the daylight global to determine the current time zone name,
i.e. tzname[0] is standard time, tzname[1] is daylight savings time.
Note that altzone isn't required to be defined on all systems, so we
have to #ifdef to check if it exists in order for Lagom to build.
There's no need to allocate a String for these. Note the "string"
parameter of DateTime::parse is left as a String for now; the parser is
currently using strtol which needs a NUL-terminated string. This method
can likely be rewritten with GenericLexer.
This formats the time zone name. This is now used in the default format
string because DateTime is meant to represent local time; it only makes
sense to include the time zone by default now that we support non-UTC.
DateTime can now be parsed from a string. Implements the same formatters
as strptime: https://linux.die.net/man/3/strptime (Well, some of them at
least).
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
