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https://github.com/RGBCube/serenity
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90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, Linus Groh <linusg@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 <LibCrypto/BigInt/SignedBigInteger.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/Instant.h>
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#include <LibJS/Runtime/Temporal/Now.h>
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#include <LibJS/Runtime/Temporal/TimeZone.h>
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#include <time.h>
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namespace JS::Temporal {
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// 2 The Temporal.now Object, https://tc39.es/proposal-temporal/#sec-temporal-now-object
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Now::Now(GlobalObject& global_object)
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: Object(*global_object.object_prototype())
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{
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}
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void Now::initialize(GlobalObject& global_object)
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{
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Object::initialize(global_object);
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auto& vm = this->vm();
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.timeZone, time_zone, 0, attr);
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define_native_function(vm.names.instant, instant, 0, attr);
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}
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// 2.1.1 Temporal.now.timeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.timezone
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JS_DEFINE_NATIVE_FUNCTION(Now::time_zone)
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{
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// 1. Return ? SystemTimeZone().
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return system_time_zone(global_object);
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}
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// 2.1.2 Temporal.now.instant ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.instant
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JS_DEFINE_NATIVE_FUNCTION(Now::instant)
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{
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// 1. Return ? SystemInstant().
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return system_instant(global_object);
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}
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// 2.2.1 SystemTimeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal-systemtimezone
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Object* system_time_zone(GlobalObject& global_object)
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{
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// 1. Let identifier be ! DefaultTimeZone().
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auto identifier = default_time_zone();
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// 2. Return ? CreateTemporalTimeZone(identifier).
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return create_temporal_time_zone(global_object, identifier);
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}
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// 2.2.2 SystemUTCEpochNanoseconds ( )
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BigInt* system_utc_epoch_nanoseconds(GlobalObject& global_object)
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{
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// 1. Let ns be the approximate current UTC date and time, in nanoseconds since the epoch.
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struct timespec now;
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clock_gettime(CLOCK_REALTIME, &now);
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Checked<i64> ns_timestamp;
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ns_timestamp += now.tv_sec;
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ns_timestamp *= 1'000'000'000;
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ns_timestamp += now.tv_nsec;
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if (ns_timestamp.has_overflow()) {
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// TODO: Deal with this before 2262-04-21T00:47:16Z.
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VERIFY_NOT_REACHED();
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}
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auto ns = Crypto::SignedBigInteger::create_from(ns_timestamp.value());
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// 2. Set ns to the result of clamping ns between −8.64 × 10^21 and 8.64 × 10^21.
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// Uhh, these don't even fit in an i64... ¯\_(ツ)_/¯
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// 3. Return ℤ(ns).
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return js_bigint(global_object.heap(), move(ns));
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}
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// 2.2.3 SystemInstant ( )
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Object* system_instant(GlobalObject& global_object)
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{
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// 1. Let ns be ! SystemUTCEpochNanoseconds().
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auto* ns = system_utc_epoch_nanoseconds(global_object);
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// 2. Return ? CreateTemporalInstant(ns).
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return create_temporal_instant(global_object, *ns);
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}
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}
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