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LibJS: Add %TypedArray%.prototype.indexOf

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This commit is contained in:
Idan Horowitz 2021-07-08 04:30:52 +03:00 • committed by Linus Groh
parent da49a7a9f8
commit 6343bfa9d7
3 changed files with 92 additions and 0 deletions
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47
Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp
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@ -35,6 +35,7 @@ void TypedArrayPrototype::initialize(GlobalObject& object)
define_native_function(vm.names.findIndex, find_index, 1, attr);
define_native_function(vm.names.forEach, for_each, 1, attr);
define_native_function(vm.names.includes, includes, 1, attr);
define_native_function(vm.names.indexOf, index_of, 1, attr);
define_native_function(vm.names.some, some, 1, attr);
define_native_function(vm.names.join, join, 1, attr);
define_native_function(vm.names.keys, keys, 0, attr);
@ -308,6 +309,52 @@ JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::includes)
return Value(false);
}
// 23.2.3.14 %TypedArray%.prototype.indexOf ( searchElement [ , fromIndex ] ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::index_of)
{
auto typed_array = typed_array_from(vm, global_object);
if (!typed_array)
return {};
auto length = typed_array->array_length();
if (length == 0)
return Value(-1);
auto n = vm.argument(1).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
auto value_n = Value(n);
if (value_n.is_positive_infinity())
return Value(-1);
else if (value_n.is_negative_infinity())
n = 0;
u32 k;
if (n >= 0) {
k = n;
} else {
auto relative_k = length + n;
if (relative_k < 0)
relative_k = 0;
k = relative_k;
}
auto search_element = vm.argument(0);
for (; k < length; ++k) {
auto k_present = typed_array->has_property(k);
if (k_present) {
auto element_k = typed_array->get(k);
if (strict_eq(search_element, element_k))
return Value(k);
}
}
return Value(-1);
}
// 23.2.3.25 %TypedArray%.prototype.some ( callbackfn [ , thisArg ] ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::some)
{

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

@ -32,6 +32,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(find_index);
JS_DECLARE_NATIVE_FUNCTION(for_each);
JS_DECLARE_NATIVE_FUNCTION(includes);
JS_DECLARE_NATIVE_FUNCTION(index_of);
JS_DECLARE_NATIVE_FUNCTION(some);
JS_DECLARE_NATIVE_FUNCTION(join);
JS_DECLARE_NATIVE_FUNCTION(keys);

44
Userland/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.indexOf.js Normal file
View file

@ -0,0 +1,44 @@
const TYPED_ARRAYS = [
Uint8Array,
Uint8ClampedArray,
Uint16Array,
Uint32Array,
Int8Array,
Int16Array,
Int32Array,
Float32Array,
Float64Array,
];
const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
test("basic functionality", () => {
TYPED_ARRAYS.forEach(T => {
expect(T.prototype.indexOf).toHaveLength(1);
const typedArray = new T(3);
typedArray[0] = 1;
typedArray[1] = 2;
typedArray[2] = 3;
expect(typedArray.indexOf(2)).toBe(1);
expect(typedArray.indexOf(-1)).toBe(-1);
expect(typedArray.indexOf(Infinity)).toBe(-1);
expect(typedArray.indexOf(2, 2)).toBe(-1);
expect(typedArray.indexOf(2, -2)).toBe(1);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
expect(T.prototype.indexOf).toHaveLength(1);
const typedArray = new T(3);
typedArray[0] = 1n;
typedArray[1] = 2n;
typedArray[2] = 3n;
expect(typedArray.indexOf(2n)).toBe(1);
expect(typedArray.indexOf(-1n)).toBe(-1);
expect(typedArray.indexOf(2n, 2)).toBe(-1);
expect(typedArray.indexOf(2n, -2)).toBe(1);
});
});