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LibJS+LibWeb: Implement resizable ArrayBuffer support for TypedArray

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This is (part of) a normative change in the ECMA-262 spec. See:
a9ae96e
This commit is contained in:
Timothy Flynn 2023-12-24 14:55:10 -05:00 • committed by Andreas Kling
parent c7fec9424c
commit 9258d7b98a
47 changed files with 2059 additions and 884 deletions
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12
Userland/Libraries/LibWeb/Crypto/Crypto.cpp
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@ -49,13 +49,17 @@ WebIDL::ExceptionOr<JS::Handle<WebIDL::ArrayBufferView>> Crypto::get_random_valu
if (!array->is_typed_array_base())
return WebIDL::TypeMismatchError::create(realm(), "array must be one of Int8Array, Uint8Array, Uint8ClampedArray, Int16Array, Uint16Array, Int32Array, Uint32Array, BigInt64Array, or BigUint64Array"_fly_string);
auto const& typed_array = *array->bufferable_object().get<JS::NonnullGCPtr<JS::TypedArrayBase>>();
auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(typed_array, JS::ArrayBuffer::Order::SeqCst);
// IMPLEMENTATION DEFINED: If the viewed array buffer is out-of-bounds, throw a InvalidStateError and terminate the algorithm.
if (JS::is_typed_array_out_of_bounds(typed_array_record))
return WebIDL::InvalidStateError::create(realm(), MUST(String::formatted(JS::ErrorType::BufferOutOfBounds.message(), "TypedArray"sv)));
// 2. If the byteLength of array is greater than 65536, throw a QuotaExceededError and terminate the algorithm.
if (array->viewed_array_buffer()->byte_length() > 65536)
if (JS::typed_array_byte_length(typed_array_record) > 65536)
return WebIDL::QuotaExceededError::create(realm(), "array's byteLength may not be greater than 65536"_fly_string);
// IMPLEMENTATION DEFINED: If the viewed array buffer is detached, throw a InvalidStateError and terminate the algorithm.
if (array->viewed_array_buffer()->is_detached())
return WebIDL::InvalidStateError::create(realm(), "array is detached"_fly_string);
// FIXME: Handle SharedArrayBuffers
// 3. Overwrite all elements of array with cryptographically strong random values of the appropriate type.