Ladybird/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-06-10 18:10:56 +09:00
Code Activity

LibJS: Define AllocateTypedArrayBuffer AO out of line

Browse source 
Not only is it easier to compare to the spec when defined out of line,
but this AO was implemented inside other AOs twice.
This commit is contained in:
Timothy Flynn 2022-04-15 12:07:51 -04:00 • committed by Linus Groh
parent c076b363ce
commit c20e8cea19
Notes: sideshowbarker 2024-07-17 11:46:53 +09:00
1 changed files with 20 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

48
Userland/Libraries/LibJS/Runtime/TypedArray.cpp
View file

@ -228,19 +228,12 @@ static ThrowCompletionOr<void> initialize_typed_array_from_typed_array(GlobalObj
return {};
}
// 23.2.5.1.5 InitializeTypedArrayFromArrayLike, https://tc39.es/ecma262/#sec-initializetypedarrayfromarraylike
// 23.2.5.1.6 AllocateTypedArrayBuffer ( O, length ), https://tc39.es/ecma262/#sec-allocatetypedarraybuffer
template<typename T>
static ThrowCompletionOr<void> initialize_typed_array_from_array_like(GlobalObject& global_object, TypedArray<T>& typed_array, Object const& array_like)
static ThrowCompletionOr<void> allocate_typed_array_buffer(GlobalObject& global_object, TypedArray<T>& typed_array, size_t length)
{
auto& vm = global_object.vm();
// 1. Let len be ? LengthOfArrayLike(arrayLike).
auto length = TRY(length_of_array_like(global_object, array_like));
// 2. Perform ? AllocateTypedArrayBuffer(O, len).
// 23.2.5.1.6 AllocateTypedArrayBuffer ( O, length )
// Enforce 2GB "Excessive Length" limit
if (length > NumericLimits<i32>::max() / sizeof(T))
return vm.template throw_completion<RangeError>(global_object, ErrorType::InvalidLength, "typed array");
@ -271,9 +264,21 @@ static ThrowCompletionOr<void> initialize_typed_array_from_array_like(GlobalObje
// 9. Set O.[[ArrayLength]] to length.
typed_array.set_array_length(length);
// 10. Return O.
// End of 23.2.5.1.6
// 10. Return unused.
return {};
}
// 23.2.5.1.5 InitializeTypedArrayFromArrayLike, https://tc39.es/ecma262/#sec-initializetypedarrayfromarraylike
template<typename T>
static ThrowCompletionOr<void> initialize_typed_array_from_array_like(GlobalObject& global_object, TypedArray<T>& typed_array, Object const& array_like)
{
// 1. Let len be ? LengthOfArrayLike(arrayLike).
auto length = TRY(length_of_array_like(global_object, array_like));
// 2. Perform ? AllocateTypedArrayBuffer(O, len).
TRY(allocate_typed_array_buffer(global_object, typed_array, length));
// 3. Let k be 0.
// 4. Repeat, while k < len,
for (size_t k = 0; k < length; k++) {
// a. Let Pk be ! ToString(𝔽(k)).
@ -286,6 +291,7 @@ static ThrowCompletionOr<void> initialize_typed_array_from_array_like(GlobalObje
// d. Set k to k + 1.
}
// 5. Return unused.
return {};
}
@ -293,27 +299,11 @@ static ThrowCompletionOr<void> initialize_typed_array_from_array_like(GlobalObje
template<typename T>
static ThrowCompletionOr<void> initialize_typed_array_from_list(GlobalObject& global_object, TypedArray<T>& typed_array, MarkedVector<Value> const& list)
{
auto& vm = global_object.vm();
// 1. Let len be the number of elements in values.
auto length = list.size();
// 2. Perform ? AllocateTypedArrayBuffer(O, len).
// Enforce 2GB "Excessive Length" limit
if (length > NumericLimits<i32>::max() / sizeof(T))
return vm.template throw_completion<RangeError>(global_object, ErrorType::InvalidLength, "typed array");
auto element_size = typed_array.element_size();
if (Checked<size_t>::multiplication_would_overflow(element_size, length))
return vm.template throw_completion<RangeError>(global_object, ErrorType::InvalidLength, "typed array");
auto byte_length = element_size * length;
auto array_buffer = TRY(allocate_array_buffer(global_object, *global_object.array_buffer_constructor(), byte_length));
typed_array.set_viewed_array_buffer(array_buffer);
typed_array.set_byte_length(byte_length);
typed_array.set_byte_offset(0);
typed_array.set_array_length(length);
TRY(allocate_typed_array_buffer(global_object, typed_array, length));
// 3. Let k be 0.
// 4. Repeat, while k < len,
@ -328,6 +318,8 @@ static ThrowCompletionOr<void> initialize_typed_array_from_list(GlobalObject& gl
// d. Set k to k + 1.
}
// 5. Assert: values is now an empty List.
// 6. Return unused.
return {};
}