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LibJS: Add some TypedArray abstractions for querying underlying type

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IsUnclampedIntegerElementType and IsBigIntElementType.
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Timothy Flynn 2021-07-11 10:37:11 -04:00 • committed by Linus Groh
parent f4ea6b1824
commit 4f8f79c5ca
1 changed files with 16 additions and 0 deletions
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16
Userland/Libraries/LibJS/Runtime/TypedArray.h
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@ -40,6 +40,10 @@ public:
virtual size_t element_size() const = 0;
virtual String element_name() const = 0;
// 25.1.2.6 IsUnclampedIntegerElementType ( type ), https://tc39.es/ecma262/#sec-isunclampedintegerelementtype
virtual bool is_unclamped_integer_element_type() const = 0;
// 25.1.2.7 IsBigIntElementType ( type ), https://tc39.es/ecma262/#sec-isbigintelementtype
virtual bool is_bigint_element_type() const = 0;
// 25.1.2.10 GetValueFromBuffer ( arrayBuffer, byteIndex, type, isTypedArray, order [ , isLittleEndian ] ), https://tc39.es/ecma262/#sec-getvaluefrombuffer
virtual Value get_value_from_buffer(size_t byte_index, ArrayBuffer::Order, bool is_little_endian = true) const = 0;
// 25.1.2.12 SetValueInBuffer ( arrayBuffer, byteIndex, type, value, isTypedArray, order [ , isLittleEndian ] ), https://tc39.es/ecma262/#sec-setvalueinbuffer
@ -438,6 +442,18 @@ public:
virtual size_t element_size() const override { return sizeof(UnderlyingBufferDataType); };
bool is_unclamped_integer_element_type() const override
{
constexpr bool is_unclamped_integer = IsSame<T, i8> || IsSame<T, u8> || IsSame<T, i16> || IsSame<T, u16> || IsSame<T, i32> || IsSame<T, u32>;
return is_unclamped_integer;
}
bool is_bigint_element_type() const override
{
constexpr bool is_bigint = IsSame<T, i64> || IsSame<T, u64>;
return is_bigint;
}
Value get_value_from_buffer(size_t byte_index, ArrayBuffer::Order order, bool is_little_endian = true) const override { return viewed_array_buffer()->template get_value<T>(byte_index, true, order, is_little_endian); }
void set_value_in_buffer(size_t byte_index, Value value, ArrayBuffer::Order order, bool is_little_endian = true) override { viewed_array_buffer()->template set_value<T>(byte_index, value, true, order, is_little_endian); }
Value get_modify_set_value_in_buffer(size_t byte_index, Value value, ReadWriteModifyFunction operation, bool is_little_endian = true) override { return viewed_array_buffer()->template get_modify_set_value<T>(byte_index, value, move(operation), is_little_endian); }