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LibJS: Update spec steps for the few remaining Temporal AOs
This commit is contained in:
Timothy Flynn
Tim Flynn
parent
d368fcadac
commit
c8d2404230
Notes:
github-actions[bot]
2024-11-21 00:06:44 +00:00
Author: https://github.com/trflynn89 Commit: https://github.com/LadybirdBrowser/ladybird/commit/c8d24042300 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2431 Reviewed-by: https://github.com/alimpfard Reviewed-by: https://github.com/shannonbooth ✅
4 changed files with 68 additions and 81 deletions
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@ -2,6 +2,7 @@
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* Copyright (c) 2021-2022, Idan Horowitz <idan.horowitz@serenityos.org>
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -11,7 +12,7 @@
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namespace JS::Temporal {
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// 13.2 GetOptionsObject ( options ), https://tc39.es/proposal-temporal/#sec-getoptionsobject
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// 14.4.1.1 GetOptionsObject ( options ), https://tc39.es/proposal-temporal/#sec-getoptionsobject
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ThrowCompletionOr<Object*> get_options_object(VM& vm, Value options)
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{
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auto& realm = *vm.current_realm();
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@ -22,7 +23,7 @@ ThrowCompletionOr<Object*> get_options_object(VM& vm, Value options)
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return Object::create(realm, nullptr).ptr();
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}
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// 2. If Type(options) is Object, then
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// 2. If options is an Object, then
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if (options.is_object()) {
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// a. Return options.
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return &options.as_object();
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@ -32,7 +33,7 @@ ThrowCompletionOr<Object*> get_options_object(VM& vm, Value options)
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return vm.throw_completion<TypeError>(ErrorType::NotAnObject, "Options");
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}
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// 13.3 GetOption ( options, property, type, values, fallback ), https://tc39.es/proposal-temporal/#sec-getoption
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// 14.4.1.2 GetOption ( options, property, type, values, default ), https://tc39.es/proposal-temporal/#sec-getoption
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ThrowCompletionOr<Value> get_option(VM& vm, Object const& options, PropertyKey const& property, OptionType type, ReadonlySpan<StringView> values, OptionDefault const& default_)
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{
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VERIFY(property.is_string());
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@ -42,51 +43,43 @@ ThrowCompletionOr<Value> get_option(VM& vm, Object const& options, PropertyKey c
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// 2. If value is undefined, then
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if (value.is_undefined()) {
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// a. If default is required, throw a RangeError exception.
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if (default_.has<GetOptionRequired>())
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// a. If default is REQUIRED, throw a RangeError exception.
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if (default_.has<DefaultRequired>())
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return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, "undefined"sv, property.as_string());
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// b. Return default.
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return default_.visit(
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[](GetOptionRequired) -> ThrowCompletionOr<Value> { VERIFY_NOT_REACHED(); },
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[](Empty) -> ThrowCompletionOr<Value> { return js_undefined(); },
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[](bool b) -> ThrowCompletionOr<Value> { return Value(b); },
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[](double d) -> ThrowCompletionOr<Value> { return Value(d); },
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[&vm](StringView s) -> ThrowCompletionOr<Value> { return PrimitiveString::create(vm, s); });
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[](DefaultRequired) -> Value { VERIFY_NOT_REACHED(); },
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[](Empty) -> Value { return js_undefined(); },
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[](bool default_) -> Value { return Value { default_ }; },
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[](double default_) -> Value { return Value { default_ }; },
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[&](StringView default_) -> Value { return PrimitiveString::create(vm, default_); });
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}
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// 5. If type is "boolean", then
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// 3. If type is BOOLEAN, then
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if (type == OptionType::Boolean) {
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// a. Set value to ToBoolean(value).
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value = Value(value.to_boolean());
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value = Value { value.to_boolean() };
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}
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// 6. Else if type is "number", then
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else if (type == OptionType::Number) {
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// a. Set value to ? ToNumber(value).
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value = TRY(value.to_number(vm));
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// b. If value is NaN, throw a RangeError exception.
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if (value.is_nan())
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return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, vm.names.NaN.as_string(), property.as_string());
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}
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// 7. Else,
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// 4. Else,
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else {
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// a. Assert: type is "string".
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// a. Assert: type is STRING.
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VERIFY(type == OptionType::String);
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// b. Set value to ? ToString(value).
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value = TRY(value.to_primitive_string(vm));
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}
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// 8. If values is not undefined and values does not contain an element equal to value, throw a RangeError exception.
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// 5. If values is not EMPTY and values does not contain value, throw a RangeError exception.
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if (!values.is_empty()) {
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// NOTE: Every location in the spec that invokes GetOption with type=boolean also has values=undefined.
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VERIFY(value.is_string());
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if (auto value_string = value.as_string().utf8_string(); !values.contains_slow(value_string))
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return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, value_string, property.as_string());
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}
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// 9. Return value.
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// 6. Return value.
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return value;
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}
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@ -1,6 +1,7 @@
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/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -15,14 +16,28 @@
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namespace JS::Temporal {
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// 13.39 ToIntegerIfIntegral ( argument ), https://tc39.es/proposal-temporal/#sec-tointegerifintegral
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template<typename... Args>
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ThrowCompletionOr<double> to_integer_if_integral(VM& vm, Value argument, ErrorType error_type, Args&&... args)
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{
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// 1. Let number be ? ToNumber(argument).
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auto number = TRY(argument.to_number(vm));
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// 2. If number is not an integral Number, throw a RangeError exception.
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if (!number.is_integral_number())
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return vm.throw_completion<RangeError>(error_type, forward<Args>(args)...);
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// 3. Return ℝ(number).
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return number.as_double();
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}
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enum class OptionType {
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Boolean,
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String,
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Number
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};
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struct GetOptionRequired { };
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using OptionDefault = Variant<GetOptionRequired, Empty, bool, StringView, double>;
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struct DefaultRequired { };
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using OptionDefault = Variant<DefaultRequired, Empty, bool, StringView, double>;
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ThrowCompletionOr<Object*> get_options_object(VM&, Value options);
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ThrowCompletionOr<Value> get_option(VM&, Object const& options, PropertyKey const& property, OptionType type, ReadonlySpan<StringView> values, OptionDefault const&);
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@ -33,23 +48,4 @@ ThrowCompletionOr<Value> get_option(VM& vm, Object const& options, PropertyKey c
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return get_option(vm, options, property, type, ReadonlySpan<StringView> { values }, default_);
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}
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// 13.41 ToIntegerIfIntegral ( argument ), https://tc39.es/proposal-temporal/#sec-tointegerifintegral
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template<typename... Args>
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ThrowCompletionOr<double> to_integer_if_integral(VM& vm, Value argument, ErrorType error_type, Args... args)
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{
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// 1. Let number be ? ToNumber(argument).
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auto number = TRY(argument.to_number(vm));
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// 2. If number is NaN, +0𝔽, or -0𝔽, return 0.
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if (number.is_nan() || number.is_positive_zero() || number.is_negative_zero())
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return 0;
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// 3. If IsIntegralNumber(number) is false, throw a RangeError exception.
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if (!number.is_integral_number())
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return vm.template throw_completion<RangeError>(error_type, args...);
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// 4. Return ℝ(number).
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return number.as_double();
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}
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}
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@ -2,6 +2,7 @@
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -15,43 +16,36 @@
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namespace JS::Temporal {
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// 7.5.10 DurationSign ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds ), https://tc39.es/proposal-temporal/#sec-temporal-durationsign
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i8 duration_sign(double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds)
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{
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// 1. For each value v of « years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds », do
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for (auto& v : { years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds }) {
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// a. If v < 0, return -1.
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if (v < 0)
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return -1;
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// b. If v > 0, return 1.
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if (v > 0)
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return 1;
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}
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// 2. Return 0.
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return 0;
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}
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// 7.5.11 IsValidDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds ), https://tc39.es/proposal-temporal/#sec-temporal-isvalidduration
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// 7.5.16 IsValidDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds ), https://tc39.es/proposal-temporal/#sec-temporal-isvalidduration
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bool is_valid_duration(double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds)
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{
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// 1. Let sign be ! DurationSign(years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds).
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auto sign = duration_sign(years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds);
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// 1. Let sign be 0.
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auto sign = 0;
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// 2. For each value v of « years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds », do
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for (auto& v : { years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds }) {
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for (auto value : { years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds }) {
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// a. If 𝔽(v) is not finite, return false.
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if (!isfinite(v))
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if (!isfinite(value))
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return false;
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// b. If v < 0 and sign > 0, return false.
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if (v < 0 && sign > 0)
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// b. If v < 0, then
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if (value < 0) {
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// i. If sign > 0, return false.
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if (sign > 0)
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return false;
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// c. If v > 0 and sign < 0, return false.
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if (v > 0 && sign < 0)
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// ii. Set sign to -1.
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sign = -1;
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}
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// c. Else if v > 0, then
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else if (value > 0) {
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// i. If sign < 0, return false.
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if (sign < 0)
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return false;
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// ii. Set sign to 1.
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sign = 1;
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}
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}
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// 3. If abs(years) ≥ 2**32, return false.
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@ -66,8 +60,12 @@ bool is_valid_duration(double years, double months, double weeks, double days, d
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if (AK::fabs(weeks) > NumericLimits<u32>::max())
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return false;
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// 6. Let normalizedSeconds be days × 86,400 + hours × 3600 + minutes × 60 + seconds + ℝ(𝔽(milliseconds)) × 10**-3 + ℝ(𝔽(microseconds)) × 10**-6 + ℝ(𝔽(nanoseconds)) × 10**-9.
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// 7. NOTE: The above step cannot be implemented directly using floating-point arithmetic. Multiplying by 10**-3, 10**-6, and 10**-9 respectively may be imprecise when milliseconds, microseconds, or nanoseconds is an unsafe integer. This multiplication can be implemented in C++ with an implementation of std::remquo() with sufficient bits in the quotient. String manipulation will also give an exact result, since the multiplication is by a power of 10.
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// 6. Let totalFractionalSeconds be days × 86,400 + hours × 3600 + minutes × 60 + seconds + ℝ(𝔽(milliseconds)) × 10**-3 + ℝ(𝔽(microseconds)) × 10**-6 + ℝ(𝔽(nanoseconds)) × 10**-9.
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// 7. NOTE: The above step cannot be implemented directly using floating-point arithmetic. Multiplying by 10**-3,
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// 10**-6, and 10**-9 respectively may be imprecise when milliseconds, microseconds, or nanoseconds is an
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// unsafe integer. This multiplication can be implemented in C++ with an implementation of std::remquo()
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// with sufficient bits in the quotient. String manipulation will also give an exact result, since the
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// multiplication is by a power of 10.
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static Crypto::SignedBigInteger days_to_nanoseconds { 8.64e13 };
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static Crypto::SignedBigInteger hours_to_nanoseconds { 3.6e12 };
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static Crypto::SignedBigInteger minutes_to_nanoseconds { 6e10 };
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@ -84,7 +82,7 @@ bool is_valid_duration(double years, double months, double weeks, double days, d
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normalized_nanoseconds = normalized_nanoseconds.plus(Crypto::SignedBigInteger { nanoseconds });
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// 8. If abs(normalizedSeconds) ≥ 2**53, return false.
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static auto maximum_time = Crypto::SignedBigInteger { MAX_ARRAY_LIKE_INDEX }.plus(Crypto::SignedBigInteger { 1 }).multiplied_by(seconds_to_nanoseconds);
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static auto maximum_time = Crypto::SignedBigInteger { MAX_ARRAY_LIKE_INDEX }.plus(1_bigint).multiplied_by(seconds_to_nanoseconds);
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if (normalized_nanoseconds.is_negative())
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normalized_nanoseconds.negate();
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@ -92,7 +90,7 @@ bool is_valid_duration(double years, double months, double weeks, double days, d
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if (normalized_nanoseconds >= maximum_time)
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return false;
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// 3. Return true.
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// 9. Return true.
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return true;
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}
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@ -1,6 +1,7 @@
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/*
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -11,7 +12,6 @@
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namespace JS::Temporal {
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i8 duration_sign(double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds);
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bool is_valid_duration(double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds);
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}
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