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LibJS: Add %TypedArray%.prototype.fill

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Idan Horowitz 2021-07-08 03:53:28 +03:00 • committed by Linus Groh
parent a9de3b1d8f
commit 3b9886949f
3 changed files with 122 additions and 0 deletions
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64
Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp
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@ -30,6 +30,7 @@ void TypedArrayPrototype::initialize(GlobalObject& object)
define_native_accessor(vm.names.byteOffset, byte_offset_getter, nullptr, Attribute::Configurable);
define_native_function(vm.names.at, at, 1, attr);
define_native_function(vm.names.every, every, 1, attr);
define_native_function(vm.names.fill, fill, 1, attr);
define_native_function(vm.names.find, find, 1, attr);
define_native_function(vm.names.findIndex, find_index, 1, attr);
define_native_function(vm.names.forEach, for_each, 1, attr);
@ -163,6 +164,69 @@ JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::every)
return Value(result);
}
// 23.2.3.8 %TypedArray%.prototype.fill ( value [ , start [ , end ] ] ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::fill)
{
auto typed_array = typed_array_from(vm, global_object);
if (!typed_array)
return {};
auto length = typed_array->array_length();
Value value;
if (typed_array->content_type() == TypedArrayBase::ContentType::BigInt) {
value = vm.argument(0).to_bigint(global_object);
if (vm.exception())
return {};
} else {
value = vm.argument(0).to_number(global_object);
if (vm.exception())
return {};
}
auto relative_start = vm.argument(1).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
u32 k;
if (Value(relative_start).is_negative_infinity())
k = 0;
else if (relative_start < 0)
k = max(length + relative_start, 0);
else
k = min(relative_start, length);
double relative_end;
if (vm.argument(2).is_undefined()) {
relative_end = length;
} else {
relative_end = vm.argument(2).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
}
u32 final;
if (Value(relative_end).is_negative_infinity())
final = 0;
else if (relative_end < 0)
final = max(length + relative_end, 0);
else
final = min(relative_end, length);
if (typed_array->viewed_array_buffer()->is_detached()) {
vm.throw_exception<TypeError>(global_object, ErrorType::DetachedArrayBuffer);
return {};
}
for (; k < final; ++k) {
typed_array->set(k, value, true);
if (vm.exception())
return {};
}
return typed_array;
}
// 23.2.3.10 %TypedArray%.prototype.find ( predicate [ , thisArg ] ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::find)
{

1
Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.h
View file

@ -27,6 +27,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(to_string_tag_getter);
JS_DECLARE_NATIVE_FUNCTION(at);
JS_DECLARE_NATIVE_FUNCTION(every);
JS_DECLARE_NATIVE_FUNCTION(fill);
JS_DECLARE_NATIVE_FUNCTION(find);
JS_DECLARE_NATIVE_FUNCTION(find_index);
JS_DECLARE_NATIVE_FUNCTION(for_each);