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cc00ccec41
This commit adds the PlainDate object itself, its constructor and prototype (currently empty), and several required abstract operations.
72 lines
3.3 KiB
C++
72 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Date.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainDateTime.h>
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#include <LibJS/Runtime/Temporal/PlainTime.h>
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namespace JS::Temporal {
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// 5.5.1 GetEpochFromISOParts ( year, month, day, hour, minute, second, millisecond, microsecond, nanosecond ), https://tc39.es/proposal-temporal/#sec-temporal-getepochfromisoparts
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BigInt* get_epoch_from_iso_parts(GlobalObject& global_object, i32 year, i32 month, i32 day, i32 hour, i32 minute, i32 second, i32 millisecond, i32 microsecond, i32 nanosecond)
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{
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auto& vm = global_object.vm();
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// 1. Assert: year, month, day, hour, minute, second, millisecond, microsecond, and nanosecond are integers.
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// 2. Assert: ! IsValidISODate(year, month, day) is true.
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VERIFY(is_valid_iso_date(year, month, day));
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// 3. Assert: ! IsValidTime(hour, minute, second, millisecond, microsecond, nanosecond) is true.
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VERIFY(is_valid_time(hour, minute, second, millisecond, microsecond, nanosecond));
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// 4. Let date be ! MakeDay(𝔽(year), 𝔽(month − 1), 𝔽(day)).
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auto date = make_day(global_object, Value(year), Value(month - 1), Value(day));
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// 5. Let time be ! MakeTime(𝔽(hour), 𝔽(minute), 𝔽(second), 𝔽(millisecond)).
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auto time = make_time(global_object, Value(hour), Value(minute), Value(second), Value(millisecond));
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// 6. Let ms be ! MakeDate(date, time).
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auto ms = make_date(date, time);
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// 7. Assert: ms is finite.
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VERIFY(ms.is_finite_number());
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// 8. Return ℝ(ms) × 10^6 + microsecond × 10^3 + nanosecond.
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return js_bigint(vm.heap(), Crypto::SignedBigInteger::create_from(static_cast<i64>(ms.as_double())).multiplied_by(Crypto::UnsignedBigInteger { 1'000'000 }).plus(Crypto::SignedBigInteger::create_from((i64)microsecond * 1000)).plus(Crypto::SignedBigInteger(nanosecond)));
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}
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// -864 * 10^19 - 864 * 10^14
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const auto DATETIME_NANOSECONDS_MIN = "-8640086400000000000000"_sbigint;
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// +864 * 10^19 + 864 * 10^14
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const auto DATETIME_NANOSECONDS_MAX = "8640086400000000000000"_sbigint;
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// 5.5.2 ISODateTimeWithinLimits ( year, month, day, hour, minute, second, millisecond, microsecond, nanosecond ), https://tc39.es/proposal-temporal/#sec-temporal-isodatetimewithinlimits
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bool iso_date_time_within_limits(GlobalObject& global_object, i32 year, i32 month, i32 day, i32 hour, i32 minute, i32 second, i32 millisecond, i32 microsecond, i32 nanosecond)
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{
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// 1. Assert: year, month, day, hour, minute, second, millisecond, microsecond, and nanosecond are integers.
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// 2. Let ns be ! GetEpochFromISOParts(year, month, day, hour, minute, second, millisecond, microsecond, nanosecond).
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auto ns = get_epoch_from_iso_parts(global_object, year, month, day, hour, minute, second, millisecond, microsecond, nanosecond);
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// 3. If ns ≤ -8.64 × 10^21 - 8.64 × 10^16, then
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if (ns->big_integer() <= DATETIME_NANOSECONDS_MIN) {
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// a. Return false.
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return false;
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}
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// 4. If ns ≥ 8.64 × 10^21 + 8.64 × 10^16, then
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if (ns->big_integer() >= DATETIME_NANOSECONDS_MAX) {
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// a. Return false.
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return false;
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}
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// 5. Return true.
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return true;
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}
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}
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