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LibWeb: Add a couple ad-hoc BufferSource AOs

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These helpers will be used by CompressionStream/DecompressionStream.
This commit is contained in:
Timothy Flynn
2024-11-15 14:47:27 -05:00
committed by Andreas Kling
parent 35ba7c7e00
commit c0da3e356a
2 changed files with 23 additions and 0 deletions
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21
Libraries/LibWeb/WebIDL/AbstractOperations.cpp
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@@ -23,6 +23,27 @@
namespace Web::WebIDL {
bool is_buffer_source_type(JS::Value value)
{
if (!value.is_object())
return false;
auto const& object = value.as_object();
return is<JS::TypedArrayBase>(object) || is<JS::DataView>(object) || is<JS::ArrayBuffer>(object);
}
GC::Ptr<JS::ArrayBuffer> underlying_buffer_source(JS::Object& buffer_source)
{
if (is<JS::TypedArrayBase>(buffer_source))
return static_cast<JS::TypedArrayBase&>(buffer_source).viewed_array_buffer();
if (is<JS::DataView>(buffer_source))
return static_cast<JS::DataView&>(buffer_source).viewed_array_buffer();
if (is<JS::ArrayBuffer>(buffer_source))
return static_cast<JS::ArrayBuffer&>(buffer_source);
VERIFY_NOT_REACHED();
}
// https://webidl.spec.whatwg.org/#dfn-get-buffer-source-copy
ErrorOr<ByteBuffer> get_buffer_source_copy(JS::Object const& buffer_source)
{