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LibJS: Add the TypedArray.of() method
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4 changed files with 88 additions and 0 deletions
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@ -156,6 +156,7 @@
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M(TypedArrayInvalidByteOffset, "Invalid byte offset for {}: must be a multiple of {}, got {}") \
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M(TypedArrayInvalidByteOffset, "Invalid byte offset for {}: must be a multiple of {}, got {}") \
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M(TypedArrayOutOfRangeByteOffset, "Typed array byte offset {} is out of range for buffer with length {}") \
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M(TypedArrayOutOfRangeByteOffset, "Typed array byte offset {} is out of range for buffer with length {}") \
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M(TypedArrayOutOfRangeByteOffsetOrLength, "Typed array range {}:{} is out of range for buffer with length {}") \
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M(TypedArrayOutOfRangeByteOffsetOrLength, "Typed array range {}:{} is out of range for buffer with length {}") \
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M(TypedArrayFailedSettingIndex, "Failed setting value of index {} of typed array") \
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M(UnknownIdentifier, "'{}' is not defined") \
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M(UnknownIdentifier, "'{}' is not defined") \
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M(URIMalformed, "URI malformed") \
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M(URIMalformed, "URI malformed") \
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/* LibWeb bindings */ \
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/* LibWeb bindings */ \
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@ -5,6 +5,7 @@
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*/
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*/
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/TypedArray.h>
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#include <LibJS/Runtime/TypedArrayConstructor.h>
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#include <LibJS/Runtime/TypedArrayConstructor.h>
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namespace JS {
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namespace JS {
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@ -26,6 +27,9 @@ void TypedArrayConstructor::initialize(GlobalObject& global_object)
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define_property(vm.names.prototype, global_object.typed_array_prototype(), 0);
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define_property(vm.names.prototype, global_object.typed_array_prototype(), 0);
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define_property(vm.names.length, Value(0), Attribute::Configurable);
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define_property(vm.names.length, Value(0), Attribute::Configurable);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.of, of, 0, attr);
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define_native_accessor(vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
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define_native_accessor(vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
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}
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}
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@ -44,6 +48,60 @@ Value TypedArrayConstructor::construct(Function&)
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return {};
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return {};
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}
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}
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// 23.2.4.2 TypedArrayCreate ( constructor, argumentList ), https://tc39.es/ecma262/#typedarray-create
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static TypedArrayBase* typed_array_create(GlobalObject& global_object, Function& constructor, MarkedValueList arguments)
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{
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auto& vm = global_object.vm();
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auto argument_count = arguments.size();
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auto first_argument = argument_count > 0 ? arguments[0] : js_undefined();
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auto new_typed_array = vm.construct(constructor, constructor, move(arguments));
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if (vm.exception())
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return nullptr;
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if (!new_typed_array.is_object() || !new_typed_array.as_object().is_typed_array()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::NotA, "TypedArray");
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return nullptr;
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}
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auto& typed_array = static_cast<TypedArrayBase&>(new_typed_array.as_object());
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if (typed_array.viewed_array_buffer()->is_detached()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::DetachedArrayBuffer);
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return nullptr;
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}
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if (argument_count == 1 && first_argument.is_number() && typed_array.array_length() < first_argument.as_double()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::InvalidLength, "typed array");
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return nullptr;
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}
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return &typed_array;
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}
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// 23.2.2.2 %TypedArray%.of ( ...items ), https://tc39.es/ecma262/#sec-%typedarray%.of
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JS_DEFINE_NATIVE_FUNCTION(TypedArrayConstructor::of)
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{
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auto length = vm.argument_count();
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auto constructor = vm.this_value(global_object);
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if (!constructor.is_constructor()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::NotAConstructor, constructor.to_string_without_side_effects());
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return {};
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}
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MarkedValueList arguments(vm.heap());
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arguments.append(Value(length));
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auto new_object = typed_array_create(global_object, constructor.as_function(), move(arguments));
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if (vm.exception())
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return {};
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for (size_t k = 0; k < length; ++k) {
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auto success = new_object->put(k, vm.argument(k));
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if (vm.exception())
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return {};
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if (!success) {
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vm.throw_exception<TypeError>(global_object, ErrorType::TypedArrayFailedSettingIndex, k);
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return {};
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}
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}
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return new_object;
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}
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// 23.2.2.4 get %TypedArray% [ @@species ], https://tc39.es/ecma262/#sec-get-%typedarray%-@@species
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JS_DEFINE_NATIVE_GETTER(TypedArrayConstructor::symbol_species_getter)
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JS_DEFINE_NATIVE_GETTER(TypedArrayConstructor::symbol_species_getter)
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{
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{
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return vm.this_value(global_object);
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return vm.this_value(global_object);
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@ -25,6 +25,7 @@ public:
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private:
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private:
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virtual bool has_constructor() const override { return true; }
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virtual bool has_constructor() const override { return true; }
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JS_DECLARE_NATIVE_FUNCTION(of);
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JS_DECLARE_NATIVE_GETTER(symbol_species_getter);
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JS_DECLARE_NATIVE_GETTER(symbol_species_getter);
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};
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};
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@ -0,0 +1,28 @@
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const TYPED_ARRAYS = [
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Uint8Array,
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Uint16Array,
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Uint32Array,
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Int8Array,
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Int16Array,
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Int32Array,
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Float32Array,
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Float64Array,
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];
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const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
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test("basic functionality", () => {
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TYPED_ARRAYS.forEach(T => {
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const newTypedArray = T.of(1, 2, 3);
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expect(newTypedArray[0]).toBe(1);
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expect(newTypedArray[1]).toBe(2);
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expect(newTypedArray[2]).toBe(3);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const newTypedArray = T.of(1n, 2n, 3n);
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expect(newTypedArray[0]).toBe(1n);
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expect(newTypedArray[1]).toBe(2n);
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expect(newTypedArray[2]).toBe(3n);
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});
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});
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