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ladybird/Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
Linus Groh 5dd5896588 LibJS+LibWeb: Replace GlobalObject with Realm in initialize() functions 
This is a continuation of the previous commit.

Calling initialize() is the first thing that's done after allocating a
cell on the JS heap - and in the common case of allocating an object,
that's where properties are assigned and intrinsics occasionally
accessed.
Since those are supposed to live on the realm eventually, this is
another step into that direction.
2022-08-23 13:58:30 +01:00

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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020-2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/BuiltinWrappers.h>
#include <AK/CharacterTypes.h>
#include <AK/Hex.h>
#include <AK/Platform.h>
#include <AK/UnicodeUtils.h>
#include <AK/Utf16View.h>
#include <AK/Utf8View.h>
#include <LibJS/Console.h>
#include <LibJS/Heap/DeferGC.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/AggregateErrorConstructor.h>
#include <LibJS/Runtime/AggregateErrorPrototype.h>
#include <LibJS/Runtime/ArrayBufferConstructor.h>
#include <LibJS/Runtime/ArrayBufferPrototype.h>
#include <LibJS/Runtime/ArrayConstructor.h>
#include <LibJS/Runtime/ArrayIteratorPrototype.h>
#include <LibJS/Runtime/ArrayPrototype.h>
#include <LibJS/Runtime/AsyncFromSyncIteratorPrototype.h>
#include <LibJS/Runtime/AsyncFunctionConstructor.h>
#include <LibJS/Runtime/AsyncFunctionPrototype.h>
#include <LibJS/Runtime/AsyncGeneratorFunctionConstructor.h>
#include <LibJS/Runtime/AsyncGeneratorFunctionPrototype.h>
#include <LibJS/Runtime/AsyncGeneratorPrototype.h>
#include <LibJS/Runtime/AsyncIteratorPrototype.h>
#include <LibJS/Runtime/AtomicsObject.h>
#include <LibJS/Runtime/BigIntConstructor.h>
#include <LibJS/Runtime/BigIntPrototype.h>
#include <LibJS/Runtime/BooleanConstructor.h>
#include <LibJS/Runtime/BooleanPrototype.h>
#include <LibJS/Runtime/ConsoleObject.h>
#include <LibJS/Runtime/DataViewConstructor.h>
#include <LibJS/Runtime/DataViewPrototype.h>
#include <LibJS/Runtime/DateConstructor.h>
#include <LibJS/Runtime/DatePrototype.h>
#include <LibJS/Runtime/ErrorConstructor.h>
#include <LibJS/Runtime/ErrorPrototype.h>
#include <LibJS/Runtime/FinalizationRegistryConstructor.h>
#include <LibJS/Runtime/FinalizationRegistryPrototype.h>
#include <LibJS/Runtime/FunctionConstructor.h>
#include <LibJS/Runtime/FunctionPrototype.h>
#include <LibJS/Runtime/GeneratorFunctionConstructor.h>
#include <LibJS/Runtime/GeneratorFunctionPrototype.h>
#include <LibJS/Runtime/GeneratorPrototype.h>
#include <LibJS/Runtime/GlobalEnvironment.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/CollatorConstructor.h>
#include <LibJS/Runtime/Intl/CollatorPrototype.h>
#include <LibJS/Runtime/Intl/DateTimeFormatConstructor.h>
#include <LibJS/Runtime/Intl/DateTimeFormatPrototype.h>
#include <LibJS/Runtime/Intl/DisplayNamesConstructor.h>
#include <LibJS/Runtime/Intl/DisplayNamesPrototype.h>
#include <LibJS/Runtime/Intl/DurationFormatConstructor.h>
#include <LibJS/Runtime/Intl/DurationFormatPrototype.h>
#include <LibJS/Runtime/Intl/Intl.h>
#include <LibJS/Runtime/Intl/ListFormatConstructor.h>
#include <LibJS/Runtime/Intl/ListFormatPrototype.h>
#include <LibJS/Runtime/Intl/LocaleConstructor.h>
#include <LibJS/Runtime/Intl/LocalePrototype.h>
#include <LibJS/Runtime/Intl/NumberFormatConstructor.h>
#include <LibJS/Runtime/Intl/NumberFormatPrototype.h>
#include <LibJS/Runtime/Intl/PluralRulesConstructor.h>
#include <LibJS/Runtime/Intl/PluralRulesPrototype.h>
#include <LibJS/Runtime/Intl/RelativeTimeFormatConstructor.h>
#include <LibJS/Runtime/Intl/RelativeTimeFormatPrototype.h>
#include <LibJS/Runtime/Intl/SegmentIteratorPrototype.h>
#include <LibJS/Runtime/Intl/SegmenterConstructor.h>
#include <LibJS/Runtime/Intl/SegmenterPrototype.h>
#include <LibJS/Runtime/Intl/SegmentsPrototype.h>
#include <LibJS/Runtime/IteratorPrototype.h>
#include <LibJS/Runtime/JSONObject.h>
#include <LibJS/Runtime/MapConstructor.h>
#include <LibJS/Runtime/MapIteratorPrototype.h>
#include <LibJS/Runtime/MapPrototype.h>
#include <LibJS/Runtime/MathObject.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/NumberConstructor.h>
#include <LibJS/Runtime/NumberPrototype.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/ObjectConstructor.h>
#include <LibJS/Runtime/ObjectPrototype.h>
#include <LibJS/Runtime/PromiseConstructor.h>
#include <LibJS/Runtime/PromisePrototype.h>
#include <LibJS/Runtime/ProxyConstructor.h>
#include <LibJS/Runtime/Realm.h>
#include <LibJS/Runtime/ReflectObject.h>
#include <LibJS/Runtime/RegExpConstructor.h>
#include <LibJS/Runtime/RegExpPrototype.h>
#include <LibJS/Runtime/RegExpStringIteratorPrototype.h>
#include <LibJS/Runtime/SetConstructor.h>
#include <LibJS/Runtime/SetIteratorPrototype.h>
#include <LibJS/Runtime/SetPrototype.h>
#include <LibJS/Runtime/ShadowRealmConstructor.h>
#include <LibJS/Runtime/ShadowRealmPrototype.h>
#include <LibJS/Runtime/Shape.h>
#include <LibJS/Runtime/StringConstructor.h>
#include <LibJS/Runtime/StringIteratorPrototype.h>
#include <LibJS/Runtime/StringPrototype.h>
#include <LibJS/Runtime/SymbolConstructor.h>
#include <LibJS/Runtime/SymbolPrototype.h>
#include <LibJS/Runtime/Temporal/CalendarConstructor.h>
#include <LibJS/Runtime/Temporal/CalendarPrototype.h>
#include <LibJS/Runtime/Temporal/DurationConstructor.h>
#include <LibJS/Runtime/Temporal/DurationPrototype.h>
#include <LibJS/Runtime/Temporal/InstantConstructor.h>
#include <LibJS/Runtime/Temporal/InstantPrototype.h>
#include <LibJS/Runtime/Temporal/PlainDateConstructor.h>
#include <LibJS/Runtime/Temporal/PlainDatePrototype.h>
#include <LibJS/Runtime/Temporal/PlainDateTimeConstructor.h>
#include <LibJS/Runtime/Temporal/PlainDateTimePrototype.h>
#include <LibJS/Runtime/Temporal/PlainMonthDayConstructor.h>
#include <LibJS/Runtime/Temporal/PlainMonthDayPrototype.h>
#include <LibJS/Runtime/Temporal/PlainTimeConstructor.h>
#include <LibJS/Runtime/Temporal/PlainTimePrototype.h>
#include <LibJS/Runtime/Temporal/PlainYearMonthConstructor.h>
#include <LibJS/Runtime/Temporal/PlainYearMonthPrototype.h>
#include <LibJS/Runtime/Temporal/Temporal.h>
#include <LibJS/Runtime/Temporal/TimeZoneConstructor.h>
#include <LibJS/Runtime/Temporal/TimeZonePrototype.h>
#include <LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h>
#include <LibJS/Runtime/Temporal/ZonedDateTimePrototype.h>
#include <LibJS/Runtime/TypedArray.h>
#include <LibJS/Runtime/TypedArrayConstructor.h>
#include <LibJS/Runtime/TypedArrayPrototype.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/WeakMapConstructor.h>
#include <LibJS/Runtime/WeakMapPrototype.h>
#include <LibJS/Runtime/WeakRefConstructor.h>
#include <LibJS/Runtime/WeakRefPrototype.h>
#include <LibJS/Runtime/WeakSetConstructor.h>
#include <LibJS/Runtime/WeakSetPrototype.h>
namespace JS {
GlobalObject::GlobalObject(Realm& realm)
: Object(GlobalObjectTag::Tag, realm)
, m_console(make<Console>(*this))
{
}
void GlobalObject::initialize_global_object()
{
auto& vm = this->vm();
ensure_shape_is_unique();
// These are done first since other prototypes depend on their presence.
VERIFY(associated_realm());
auto& realm = *associated_realm();
m_empty_object_shape = heap().allocate_without_global_object<Shape>(realm);
m_object_prototype = heap().allocate_without_global_object<ObjectPrototype>(realm);
m_function_prototype = heap().allocate_without_global_object<FunctionPrototype>(realm);
m_new_object_shape = vm.heap().allocate_without_global_object<Shape>(realm);
m_new_object_shape->set_prototype_without_transition(m_object_prototype);
m_new_ordinary_function_prototype_object_shape = vm.heap().allocate_without_global_object<Shape>(realm);
m_new_ordinary_function_prototype_object_shape->set_prototype_without_transition(m_object_prototype);
m_new_ordinary_function_prototype_object_shape->add_property_without_transition(vm.names.constructor, Attribute::Writable | Attribute::Configurable);
// Normally Heap::allocate() takes care of this, but these are allocated via allocate_without_global_object().
static_cast<FunctionPrototype*>(m_function_prototype)->initialize(realm);
static_cast<ObjectPrototype*>(m_object_prototype)->initialize(realm);
Object::set_prototype(m_object_prototype);
// This must be initialized before allocating AggregateErrorPrototype, which uses ErrorPrototype as its prototype.
m_error_prototype = heap().allocate<ErrorPrototype>(*this, realm);
#define __JS_ENUMERATE(ClassName, snake_name) \
if (!m_##snake_name##_prototype) \
m_##snake_name##_prototype = heap().allocate<ClassName##Prototype>(*this, realm);
JS_ENUMERATE_ITERATOR_PROTOTYPES
#undef __JS_ENUMERATE
// These must be initialized separately as they have no companion constructor
m_async_from_sync_iterator_prototype = heap().allocate<AsyncFromSyncIteratorPrototype>(*this, realm);
m_async_generator_prototype = heap().allocate<AsyncGeneratorPrototype>(*this, realm);
m_generator_prototype = heap().allocate<GeneratorPrototype>(*this, realm);
m_intl_segments_prototype = heap().allocate<Intl::SegmentsPrototype>(*this, realm);
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
if (!m_##snake_name##_prototype) \
m_##snake_name##_prototype = heap().allocate<PrototypeName>(*this, realm);
JS_ENUMERATE_BUILTIN_TYPES
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
if (!m_intl_##snake_name##_prototype) \
m_intl_##snake_name##_prototype = heap().allocate<Intl::PrototypeName>(*this, realm);
JS_ENUMERATE_INTL_OBJECTS
#undef __JS_ENUMERATE
// Must be allocated before `Intl::Intl` below.
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
initialize_constructor(vm.names.ClassName, m_intl_##snake_name##_constructor, m_intl_##snake_name##_prototype);
JS_ENUMERATE_INTL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
if (!m_temporal_##snake_name##_prototype) \
m_temporal_##snake_name##_prototype = heap().allocate<Temporal::PrototypeName>(*this, realm);
JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE
// Must be allocated before `Temporal::Temporal` below.
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
initialize_constructor(vm.names.ClassName, m_temporal_##snake_name##_constructor, m_temporal_##snake_name##_prototype);
JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.gc, gc, 0, attr);
define_native_function(vm.names.isNaN, is_nan, 1, attr);
define_native_function(vm.names.isFinite, is_finite, 1, attr);
define_native_function(vm.names.parseFloat, parse_float, 1, attr);
define_native_function(vm.names.parseInt, parse_int, 2, attr);
define_native_function(vm.names.eval, eval, 1, attr);
// 10.2.4.1 %ThrowTypeError% ( ), https://tc39.es/ecma262/#sec-%throwtypeerror%
m_throw_type_error_function = NativeFunction::create(global_object(), {}, [](VM& vm, GlobalObject& global_object) {
return vm.throw_completion<TypeError>(global_object, ErrorType::RestrictedFunctionPropertiesAccess);
});
m_throw_type_error_function->define_direct_property(vm.names.length, Value(0), 0);
m_throw_type_error_function->define_direct_property(vm.names.name, js_string(vm, ""), 0);
MUST(m_throw_type_error_function->internal_prevent_extensions());
// 10.2.4 AddRestrictedFunctionProperties ( F, realm ), https://tc39.es/ecma262/#sec-addrestrictedfunctionproperties
m_function_prototype->define_direct_accessor(vm.names.caller, m_throw_type_error_function, m_throw_type_error_function, Attribute::Configurable);
m_function_prototype->define_direct_accessor(vm.names.arguments, m_throw_type_error_function, m_throw_type_error_function, Attribute::Configurable);
define_native_function(vm.names.encodeURI, encode_uri, 1, attr);
define_native_function(vm.names.decodeURI, decode_uri, 1, attr);
define_native_function(vm.names.encodeURIComponent, encode_uri_component, 1, attr);
define_native_function(vm.names.decodeURIComponent, decode_uri_component, 1, attr);
define_native_function(vm.names.escape, escape, 1, attr);
define_native_function(vm.names.unescape, unescape, 1, attr);
define_direct_property(vm.names.NaN, js_nan(), 0);
define_direct_property(vm.names.Infinity, js_infinity(), 0);
define_direct_property(vm.names.undefined, js_undefined(), 0);
define_direct_property(vm.names.globalThis, this, attr);
define_direct_property(vm.names.console, heap().allocate<ConsoleObject>(*this, realm), attr);
define_direct_property(vm.names.Atomics, heap().allocate<AtomicsObject>(*this, realm), attr);
define_direct_property(vm.names.Math, heap().allocate<MathObject>(*this, realm), attr);
define_direct_property(vm.names.JSON, heap().allocate<JSONObject>(*this, realm), attr);
define_direct_property(vm.names.Reflect, heap().allocate<ReflectObject>(*this, realm), attr);
define_direct_property(vm.names.Intl, heap().allocate<Intl::Intl>(*this, realm), attr);
define_direct_property(vm.names.Temporal, heap().allocate<Temporal::Temporal>(*this, realm), attr);
// This must be initialized before allocating AggregateErrorConstructor, which uses ErrorConstructor as its prototype.
initialize_constructor(vm.names.Error, m_error_constructor, m_error_prototype);
add_constructor(vm.names.AggregateError, m_aggregate_error_constructor, m_aggregate_error_prototype);
add_constructor(vm.names.Array, m_array_constructor, m_array_prototype);
add_constructor(vm.names.ArrayBuffer, m_array_buffer_constructor, m_array_buffer_prototype);
add_constructor(vm.names.BigInt, m_bigint_constructor, m_bigint_prototype);
add_constructor(vm.names.Boolean, m_boolean_constructor, m_boolean_prototype);
add_constructor(vm.names.DataView, m_data_view_constructor, m_data_view_prototype);
add_constructor(vm.names.Date, m_date_constructor, m_date_prototype);
add_constructor(vm.names.Error, m_error_constructor, m_error_prototype);
add_constructor(vm.names.FinalizationRegistry, m_finalization_registry_constructor, m_finalization_registry_prototype);
add_constructor(vm.names.Function, m_function_constructor, m_function_prototype);
add_constructor(vm.names.Map, m_map_constructor, m_map_prototype);
add_constructor(vm.names.Number, m_number_constructor, m_number_prototype);
add_constructor(vm.names.Object, m_object_constructor, m_object_prototype);
add_constructor(vm.names.Promise, m_promise_constructor, m_promise_prototype);
add_constructor(vm.names.Proxy, m_proxy_constructor, nullptr);
add_constructor(vm.names.RegExp, m_regexp_constructor, m_regexp_prototype);
add_constructor(vm.names.Set, m_set_constructor, m_set_prototype);
add_constructor(vm.names.ShadowRealm, m_shadow_realm_constructor, m_shadow_realm_prototype);
add_constructor(vm.names.String, m_string_constructor, m_string_prototype);
add_constructor(vm.names.Symbol, m_symbol_constructor, m_symbol_prototype);
add_constructor(vm.names.WeakMap, m_weak_map_constructor, m_weak_map_prototype);
add_constructor(vm.names.WeakRef, m_weak_ref_constructor, m_weak_ref_prototype);
add_constructor(vm.names.WeakSet, m_weak_set_constructor, m_weak_set_prototype);
initialize_constructor(vm.names.TypedArray, m_typed_array_constructor, m_typed_array_prototype);
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
add_constructor(vm.names.ClassName, m_##snake_name##_constructor, m_##snake_name##_prototype);
JS_ENUMERATE_NATIVE_ERRORS
JS_ENUMERATE_TYPED_ARRAYS
#undef __JS_ENUMERATE
// NOTE: These constructors cannot be initialized with add_constructor as they have no global binding.
initialize_constructor(vm.names.GeneratorFunction, m_generator_function_constructor, m_generator_function_prototype, Attribute::Configurable);
initialize_constructor(vm.names.AsyncGeneratorFunction, m_async_generator_function_constructor, m_async_generator_function_prototype, Attribute::Configurable);
initialize_constructor(vm.names.AsyncFunction, m_async_function_constructor, m_async_function_prototype, Attribute::Configurable);
// 27.5.1.1 Generator.prototype.constructor, https://tc39.es/ecma262/#sec-generator.prototype.constructor
m_generator_prototype->define_direct_property(vm.names.constructor, m_generator_function_prototype, Attribute::Configurable);
// 27.6.1.1 AsyncGenerator.prototype.constructor, https://tc39.es/ecma262/#sec-asyncgenerator-prototype-constructor
m_async_generator_prototype->define_direct_property(vm.names.constructor, m_async_generator_function_prototype, Attribute::Configurable);
m_array_prototype_values_function = &m_array_prototype->get_without_side_effects(vm.names.values).as_function();
m_date_constructor_now_function = &m_date_constructor->get_without_side_effects(vm.names.now).as_function();
m_eval_function = &get_without_side_effects(vm.names.eval).as_function();
m_json_parse_function = &get_without_side_effects(vm.names.JSON).as_object().get_without_side_effects(vm.names.parse).as_function();
m_object_prototype_to_string_function = &m_object_prototype->get_without_side_effects(vm.names.toString).as_function();
}
GlobalObject::~GlobalObject() = default;
void GlobalObject::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_empty_object_shape);
visitor.visit(m_new_object_shape);
visitor.visit(m_new_ordinary_function_prototype_object_shape);
visitor.visit(m_proxy_constructor);
visitor.visit(m_async_from_sync_iterator_prototype);
visitor.visit(m_async_generator_prototype);
visitor.visit(m_generator_prototype);
visitor.visit(m_intl_segments_prototype);
visitor.visit(m_array_prototype_values_function);
visitor.visit(m_date_constructor_now_function);
visitor.visit(m_eval_function);
visitor.visit(m_json_parse_function);
visitor.visit(m_object_prototype_to_string_function);
visitor.visit(m_throw_type_error_function);
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
visitor.visit(m_##snake_name##_constructor); \
visitor.visit(m_##snake_name##_prototype);
JS_ENUMERATE_BUILTIN_TYPES
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
visitor.visit(m_intl_##snake_name##_constructor); \
visitor.visit(m_intl_##snake_name##_prototype);
JS_ENUMERATE_INTL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
visitor.visit(m_temporal_##snake_name##_constructor); \
visitor.visit(m_temporal_##snake_name##_prototype);
JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE
#define __JS_ENUMERATE(ClassName, snake_name) \
visitor.visit(m_##snake_name##_prototype);
JS_ENUMERATE_ITERATOR_PROTOTYPES
#undef __JS_ENUMERATE
}
Realm* GlobalObject::associated_realm()
{
return m_associated_realm;
}
void GlobalObject::set_associated_realm(Realm& realm)
{
VERIFY(&realm == &shape().realm());
m_associated_realm = &realm;
}
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::gc)
{
#ifdef __serenity__
dbgln("Forced garbage collection requested!");
#endif
vm.heap().collect_garbage();
return js_undefined();
}
// 19.2.3 isNaN ( number ), https://tc39.es/ecma262/#sec-isnan-number
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::is_nan)
{
return Value(TRY(vm.argument(0).to_number(global_object)).is_nan());
}
// 19.2.2 isFinite ( number ), https://tc39.es/ecma262/#sec-isfinite-number
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::is_finite)
{
return Value(TRY(vm.argument(0).to_number(global_object)).is_finite_number());
}
// 19.2.4 parseFloat ( string ), https://tc39.es/ecma262/#sec-parsefloat-string
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::parse_float)
{
if (vm.argument(0).is_number())
return vm.argument(0);
auto input_string = TRY(vm.argument(0).to_string(global_object));
auto trimmed_string = MUST(trim_string(global_object, js_string(vm, input_string), TrimMode::Left));
for (size_t length = trimmed_string.length(); length > 0; --length) {
auto number = MUST(Value(js_string(vm, trimmed_string.substring(0, length))).to_number(global_object));
if (!number.is_nan())
return number;
}
return js_nan();
}
// 19.2.5 parseInt ( string, radix ), https://tc39.es/ecma262/#sec-parseint-string-radix
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::parse_int)
{
// 1. Let inputString be ? ToString(string).
auto input_string = TRY(vm.argument(0).to_string(global_object));
// 2. Let S be ! TrimString(inputString, start).
auto string = MUST(trim_string(global_object, js_string(vm, input_string), TrimMode::Left));
// 3. Let sign be 1.
auto sign = 1;
// 4. If S is not empty and the first code unit of S is the code unit 0x002D (HYPHEN-MINUS), set sign to -1.
if (!string.is_empty() && string[0] == 0x2D)
sign = -1;
// 5. If S is not empty and the first code unit of S is the code unit 0x002B (PLUS SIGN) or the code unit 0x002D (HYPHEN-MINUS), remove the first code unit from S.
auto trimmed_view = string.view();
if (!string.is_empty() && (string[0] == 0x2B || string[0] == 0x2D))
trimmed_view = trimmed_view.substring_view(1);
// 6. Let R be ℝ(? ToInt32(radix)).
auto radix = TRY(vm.argument(1).to_i32(global_object));
// 7. Let stripPrefix be true.
auto strip_prefix = true;
// 8. If R ≠ 0, then
if (radix != 0) {
// a. If R < 2 or R > 36, return NaN.
if (radix < 2 || radix > 36)
return js_nan();
// b. If R ≠ 16, set stripPrefix to false.
if (radix != 16)
strip_prefix = false;
}
// 9. Else,
else {
// a. Set R to 10.
radix = 10;
}
// 10. If stripPrefix is true, then
if (strip_prefix) {
// a. If the length of S is at least 2 and the first two code units of S are either "0x" or "0X", then
if (trimmed_view.length() >= 2 && trimmed_view.substring_view(0, 2).equals_ignoring_case("0x"sv)) {
// i. Remove the first two code units from S.
trimmed_view = trimmed_view.substring_view(2);
// ii. Set R to 16.
radix = 16;
}
}
// 11. If S contains a code unit that is not a radix-R digit, let end be the index within S of the first such code unit; otherwise, let end be the length of S.
// 12. Let Z be the substring of S from 0 to end.
// 13. If Z is empty, return NaN.
// 14. Let mathInt be the integer value that is represented by Z in radix-R notation, using the letters A-Z and a-z for digits with values 10 through 35. (However, if R is 10 and Z contains more than 20 significant digits, every significant digit after the 20th may be replaced by a 0 digit, at the option of the implementation; and if R is not 2, 4, 8, 10, 16, or 32, then mathInt may be an implementation-approximated integer representing the integer value denoted by Z in radix-R notation.)
auto parse_digit = [&](u32 code_point) -> Optional<u32> {
if (!is_ascii_alphanumeric(code_point))
return {};
auto digit = parse_ascii_base36_digit(code_point);
if (digit >= (u32)radix)
return {};
return digit;
};
bool had_digits = false;
double number = 0;
for (auto code_point : Utf8View(trimmed_view)) {
auto digit = parse_digit(code_point);
if (!digit.has_value())
break;
had_digits = true;
number *= radix;
number += digit.value();
}
if (!had_digits)
return js_nan();
// 15. If mathInt = 0, then
// a. If sign = -1, return -0𝔽.
// b. Return +0𝔽.
// 16. Return 𝔽(sign × mathInt).
return Value(sign * number);
}
// 19.2.1 eval ( x ), https://tc39.es/ecma262/#sec-eval-x
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::eval)
{
return perform_eval(global_object, vm.argument(0), CallerMode::NonStrict, EvalMode::Indirect);
}
// 19.2.6.1.1 Encode ( string, unescapedSet ), https://tc39.es/ecma262/#sec-encode
static ThrowCompletionOr<String> encode(GlobalObject& global_object, String const& string, StringView unescaped_set)
{
auto& vm = global_object.vm();
auto utf16_string = Utf16String(string);
// 1. Let strLen be the length of string.
auto string_length = utf16_string.length_in_code_units();
// 2. Let R be the empty String.
StringBuilder encoded_builder;
// 3. Let k be 0.
auto k = 0u;
// 4. Repeat,
while (k < string_length) {
// a. If k = strLen, return R.
// Handled below
// b. Let C be the code unit at index k within string.
auto code_unit = utf16_string.code_unit_at(k);
// c. If C is in unescapedSet, then
// NOTE: We assume the unescaped set only contains ascii characters as unescaped_set is a StringView.
if (code_unit < 0x80 && unescaped_set.contains(code_unit)) {
// i. Set k to k + 1.
k++;
// ii. Set R to the string-concatenation of R and C.
encoded_builder.append(code_unit);
}
// d. Else,
else {
// i. Let cp be CodePointAt(string, k).
auto code_point = code_point_at(utf16_string.view(), k);
// ii. If cp.[[IsUnpairedSurrogate]] is true, throw a URIError exception.
if (code_point.is_unpaired_surrogate)
return vm.throw_completion<URIError>(global_object, ErrorType::URIMalformed);
// iii. Set k to k + cp.[[CodeUnitCount]].
k += code_point.code_unit_count;
// iv. Let Octets be the List of octets resulting by applying the UTF-8 transformation to cp.[[CodePoint]].
// v. For each element octet of Octets, do
auto nwritten = AK::UnicodeUtils::code_point_to_utf8(code_point.code_point, [&encoded_builder](u8 octet) {
// 1. Set R to the string-concatenation of:
// * R
// * "%"
// * the String representation of octet, formatted as a two-digit uppercase hexadecimal number, padded to the left with a zero if necessary
encoded_builder.appendff("%{:02X}", octet);
});
VERIFY(nwritten > 0);
}
}
return encoded_builder.build();
}
// 19.2.6.1.2 Decode ( string, reservedSet ), https://tc39.es/ecma262/#sec-decode
static ThrowCompletionOr<String> decode(GlobalObject& global_object, String const& string, StringView reserved_set)
{
StringBuilder decoded_builder;
auto code_point_start_offset = 0u;
auto expected_continuation_bytes = 0;
for (size_t k = 0; k < string.length(); k++) {
auto code_unit = string[k];
if (code_unit != '%') {
if (expected_continuation_bytes > 0)
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
decoded_builder.append(code_unit);
continue;
}
if (k + 2 >= string.length())
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
auto first_digit = decode_hex_digit(string[k + 1]);
if (first_digit >= 16)
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
auto second_digit = decode_hex_digit(string[k + 2]);
if (second_digit >= 16)
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
u8 decoded_code_unit = (first_digit << 4) | second_digit;
k += 2;
if (expected_continuation_bytes > 0) {
decoded_builder.append(decoded_code_unit);
expected_continuation_bytes--;
if (expected_continuation_bytes == 0 && !Utf8View(decoded_builder.string_view().substring_view(code_point_start_offset)).validate())
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
continue;
}
if ((decoded_code_unit & 0x80) == 0) {
if (reserved_set.contains(decoded_code_unit))
decoded_builder.append(string.substring_view(k - 2, 3));
else
decoded_builder.append(decoded_code_unit);
continue;
}
auto leading_ones = count_leading_zeroes_safe(static_cast<u8>(~decoded_code_unit));
if (leading_ones == 1 || leading_ones > 4)
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
code_point_start_offset = decoded_builder.length();
decoded_builder.append(decoded_code_unit);
expected_continuation_bytes = leading_ones - 1;
}
if (expected_continuation_bytes > 0)
return global_object.vm().throw_completion<URIError>(global_object, ErrorType::URIMalformed);
return decoded_builder.build();
}
// 19.2.6.4 encodeURI ( uri ), https://tc39.es/ecma262/#sec-encodeuri-uri
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::encode_uri)
{
auto uri_string = TRY(vm.argument(0).to_string(global_object));
auto encoded = TRY(encode(global_object, uri_string, ";/?:@&=+$,abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.!~*'()#"sv));
return js_string(vm, move(encoded));
}
// 19.2.6.2 decodeURI ( encodedURI ), https://tc39.es/ecma262/#sec-decodeuri-encodeduri
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::decode_uri)
{
auto uri_string = TRY(vm.argument(0).to_string(global_object));
auto decoded = TRY(decode(global_object, uri_string, ";/?:@&=+$,#"sv));
return js_string(vm, move(decoded));
}
// 19.2.6.5 encodeURIComponent ( uriComponent ), https://tc39.es/ecma262/#sec-encodeuricomponent-uricomponent
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::encode_uri_component)
{
auto uri_string = TRY(vm.argument(0).to_string(global_object));
auto encoded = TRY(encode(global_object, uri_string, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.!~*'()"sv));
return js_string(vm, move(encoded));
}
// 19.2.6.3 decodeURIComponent ( encodedURIComponent ), https://tc39.es/ecma262/#sec-decodeuricomponent-encodeduricomponent
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::decode_uri_component)
{
auto uri_string = TRY(vm.argument(0).to_string(global_object));
auto decoded = TRY(decode(global_object, uri_string, ""sv));
return js_string(vm, move(decoded));
}
// B.2.1.1 escape ( string ), https://tc39.es/ecma262/#sec-escape-string
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::escape)
{
auto string = TRY(vm.argument(0).to_string(global_object));
StringBuilder escaped;
for (auto code_point : utf8_to_utf16(string)) {
if (code_point < 256) {
if ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@*_+-./"sv.contains(code_point))
escaped.append(code_point);
else
escaped.appendff("%{:02X}", code_point);
continue;
}
escaped.appendff("%u{:04X}", code_point);
}
return js_string(vm, escaped.build());
}
// B.2.1.2 unescape ( string ), https://tc39.es/ecma262/#sec-unescape-string
JS_DEFINE_NATIVE_FUNCTION(GlobalObject::unescape)
{
auto string = TRY(vm.argument(0).to_string(global_object));
ssize_t length = string.length();
StringBuilder unescaped(length);
for (auto k = 0; k < length; ++k) {
u32 code_point = string[k];
if (code_point == '%') {
if (k <= length - 6 && string[k + 1] == 'u' && is_ascii_hex_digit(string[k + 2]) && is_ascii_hex_digit(string[k + 3]) && is_ascii_hex_digit(string[k + 4]) && is_ascii_hex_digit(string[k + 5])) {
code_point = (parse_ascii_hex_digit(string[k + 2]) << 12) | (parse_ascii_hex_digit(string[k + 3]) << 8) | (parse_ascii_hex_digit(string[k + 4]) << 4) | parse_ascii_hex_digit(string[k + 5]);
k += 5;
} else if (k <= length - 3 && is_ascii_hex_digit(string[k + 1]) && is_ascii_hex_digit(string[k + 2])) {
code_point = (parse_ascii_hex_digit(string[k + 1]) << 4) | parse_ascii_hex_digit(string[k + 2]);
k += 2;
}
}
unescaped.append_code_point(code_point);
}
return js_string(vm, unescaped.build());
}
}
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