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/*
* Copyright (C) 2013-2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "DataView.h"
#include "JSArrayBufferView.h"
namespace JSC {
class JSDataView final : public JSArrayBufferView {
public:
using Base = JSArrayBufferView;
static constexpr unsigned StructureFlags = Base::StructureFlags;
static constexpr unsigned elementSize = 1;
static constexpr TypedArrayContentType contentType = TypedArrayContentType::None;
template<typename CellType, SubspaceAccess mode>
static GCClient::IsoSubspace* subspaceFor(VM& vm)
{
return vm.dataViewSpace<mode>();
}
JS_EXPORT_PRIVATE static JSDataView* create(
JSGlobalObject*, Structure*, RefPtr<ArrayBuffer>&&, size_t byteOffset, size_t byteLength);
// Dummy methods, which don't actually work; these are just in place to
// placate some template specialization we do elsewhere.
static JSDataView* createUninitialized(JSGlobalObject*, Structure*, size_t length);
static JSDataView* create(JSGlobalObject*, Structure*, size_t length);
bool set(JSGlobalObject*, size_t, JSObject*, size_t, size_t length);
bool setIndex(JSGlobalObject*, size_t, JSValue);
ArrayBuffer* possiblySharedBuffer() const { return m_buffer; }
ArrayBuffer* unsharedBuffer() const
{
RELEASE_ASSERT(!m_buffer->isShared());
return m_buffer;
}
RefPtr<DataView> possiblySharedTypedImpl();
RefPtr<DataView> unsharedTypedImpl();
static constexpr TypedArrayType TypedArrayStorageType = TypeDataView;
static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
DECLARE_EXPORT_INFO;
private:
JSDataView(VM&, ConstructionContext&, ArrayBuffer*);
ArrayBuffer* m_buffer;
};
} // namespace JSC
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