[Temporal] Add ZoneDateTime.prototype.offset*

Spec Text:
https://tc39.es/proposal-temporal/#sec-get-temporal.zoneddatetime.prototype.offset
https://tc39.es/proposal-temporal/#sec-get-temporal.zoneddatetime.prototype.offsetnanoseconds

Bug: v8:11544
Change-Id: Ia88d96b038117a8e528ff9d0cdb9a07fb7cbcda5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3385606Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80096}

src/builtins/builtins-temporal.cc

@@ -160,10 +160,6 @@ TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeDaysInYear)
 TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeMonthsInYear)
 /* Temporal #sec-get-temporal.zoneddatetime.prototype.inleapyear */
 TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeInLeapYear)
-/* Temporal #sec-get-temporal.zoneddatetime.prototype.offsetnanoseconds */
-TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeOffsetNanoseconds)
-/* Temporal #sec-get-temporal.zoneddatetime.prototype.offset */
-TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeOffset)
 /* Temporal #sec-temporal.zoneddatetime.prototype.with */
 TO_BE_IMPLEMENTED(TemporalZonedDateTimePrototypeWith)
 /* Temporal #sec-temporal.zoneddatetime.prototype.withplaintime */
@@ -739,6 +735,8 @@ TEMPORAL_PROTOTYPE_METHOD1(ZonedDateTime, WithTimeZone, withTimeZone)
 TEMPORAL_PROTOTYPE_METHOD0(ZonedDateTime, ToPlainYearMonth, toPlainYearMonth)
 TEMPORAL_PROTOTYPE_METHOD0(ZonedDateTime, ToPlainMonthDay, toPlainMonthDay)
 TEMPORAL_PROTOTYPE_METHOD0(ZonedDateTime, GetISOFields, getISOFields)
+TEMPORAL_PROTOTYPE_METHOD0(ZonedDateTime, OffsetNanoseconds, offsetNanoseconds)
+TEMPORAL_PROTOTYPE_METHOD0(ZonedDateTime, Offset, offset)
 TEMPORAL_VALUE_OF(ZonedDateTime)
 
 // Duration

src/objects/js-temporal-objects.cc

@@ -6426,6 +6426,51 @@ MaybeHandle<JSTemporalInstant> JSTemporalInstant::Now(Isolate* isolate) {
   return SystemInstant(isolate);
 }
 
+// #sec-get-temporal.zoneddatetime.prototype.offsetnanoseconds
+MaybeHandle<Object> JSTemporalZonedDateTime::OffsetNanoseconds(
+    Isolate* isolate, Handle<JSTemporalZonedDateTime> zoned_date_time) {
+  TEMPORAL_ENTER_FUNC();
+  // 1. Let zonedDateTime be the this value.
+  // 2. Perform ? RequireInternalSlot(zonedDateTime,
+  // [[InitializedTemporalZonedDateTime]]).
+  // 3. Let timeZone be zonedDateTime.[[TimeZone]].
+  Handle<JSReceiver> time_zone = handle(zoned_date_time->time_zone(), isolate);
+  // 4. Let instant be ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
+  Handle<JSTemporalInstant> instant;
+  ASSIGN_RETURN_ON_EXCEPTION(
+      isolate, instant,
+      temporal::CreateTemporalInstant(
+          isolate, handle(zoned_date_time->nanoseconds(), isolate)),
+      Object);
+  // 5. Return 𝔽(? GetOffsetNanosecondsFor(timeZone, instant)).
+  Maybe<int64_t> maybe_result = GetOffsetNanosecondsFor(
+      isolate, time_zone, instant,
+      "Temporal.ZonedDateTime.prototype.offsetNanoseconds");
+  MAYBE_RETURN(maybe_result, Handle<Object>());
+  return isolate->factory()->NewNumberFromInt64(maybe_result.FromJust());
+}
+
+// #sec-get-temporal.zoneddatetime.prototype.offset
+MaybeHandle<String> JSTemporalZonedDateTime::Offset(
+    Isolate* isolate, Handle<JSTemporalZonedDateTime> zoned_date_time) {
+  TEMPORAL_ENTER_FUNC();
+  // 1. Let zonedDateTime be the this value.
+  // 2. Perform ? RequireInternalSlot(zonedDateTime,
+  // [[InitializedTemporalZonedDateTime]]).
+  // 3. Let instant be ! CreateTemporalInstant(zonedDateTime.[[Nanoseconds]]).
+  Handle<JSTemporalInstant> instant;
+  ASSIGN_RETURN_ON_EXCEPTION(
+      isolate, instant,
+      temporal::CreateTemporalInstant(
+          isolate, handle(zoned_date_time->nanoseconds(), isolate)),
+      String);
+  // 4. Return ? BuiltinTimeZoneGetOffsetStringFor(zonedDateTime.[[TimeZone]],
+  // instant).
+  return BuiltinTimeZoneGetOffsetStringFor(
+      isolate, handle(zoned_date_time->time_zone(), isolate), instant,
+      "Temporal.ZonedDateTime.prototype.offset");
+}
+
 // #sec-temporal.instant
 MaybeHandle<JSTemporalInstant> JSTemporalInstant::Constructor(
     Isolate* isolate, Handle<JSFunction> target, Handle<HeapObject> new_target,

src/objects/js-temporal-objects.h

@@ -430,6 +430,14 @@ class JSTemporalZonedDateTime
   V8_WARN_UNUSED_RESULT static MaybeHandle<JSTemporalZonedDateTime> NowISO(
       Isolate* isolate, Handle<Object> temporal_time_zone_like);
 
+  // #sec-get-temporal.zoneddatetime.prototype.offsetnanoseconds
+  V8_WARN_UNUSED_RESULT static MaybeHandle<Object> OffsetNanoseconds(
+      Isolate* isolate, Handle<JSTemporalZonedDateTime> zoned_date_time);
+
+  // #sec-get-temporal.zoneddatetime.prototype.offset
+  V8_WARN_UNUSED_RESULT static MaybeHandle<String> Offset(
+      Isolate* isolate, Handle<JSTemporalZonedDateTime> zoned_date_time);
+
   DECL_PRINTER(JSTemporalZonedDateTime)
 
   TQ_OBJECT_CONSTRUCTORS(JSTemporalZonedDateTime)

test/test262/test262.status

@@ -1956,16 +1956,6 @@
   'built-ins/Temporal/ZonedDateTime/prototype/month/timezone-getoffsetnanosecondsfor-wrong-type': [FAIL],
   'built-ins/Temporal/ZonedDateTime/prototype/nanosecond/negative-epochnanoseconds': [FAIL],
   'built-ins/Temporal/ZonedDateTime/prototype/offset/basic': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offset/branding': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offsetNanoseconds/branding': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offsetNanoseconds/timezone-getoffsetnanosecondsfor-non-integer': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offsetNanoseconds/timezone-getoffsetnanosecondsfor-not-callable': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offsetNanoseconds/timezone-getoffsetnanosecondsfor-out-of-range': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offsetNanoseconds/timezone-getoffsetnanosecondsfor-wrong-type': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offset/timezone-getoffsetnanosecondsfor-non-integer': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offset/timezone-getoffsetnanosecondsfor-not-callable': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offset/timezone-getoffsetnanosecondsfor-out-of-range': [FAIL],
-  'built-ins/Temporal/ZonedDateTime/prototype/offset/timezone-getoffsetnanosecondsfor-wrong-type': [FAIL],
   'built-ins/Temporal/ZonedDateTime/prototype/round/branding': [FAIL],
   'built-ins/Temporal/ZonedDateTime/prototype/round/dateadd-options': [FAIL],
   'built-ins/Temporal/ZonedDateTime/prototype/round/div-zero': [FAIL],