114 lines
4.6 KiB
C++
114 lines
4.6 KiB
C++
/*
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* Copyright (C) 2016 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "config.h"
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#include "StructuredClone.h"
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#include "JSDOMBinding.h"
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#include "JSDOMExceptionHandling.h"
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#include <JavaScriptCore/JSTypedArrays.h>
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namespace WebCore {
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using namespace JSC;
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enum class CloneMode {
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Full,
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Partial,
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};
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static EncodedJSValue cloneArrayBufferImpl(JSGlobalObject* lexicalGlobalObject, CallFrame* callFrame, CloneMode mode)
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{
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VM& vm = lexicalGlobalObject->vm();
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ASSERT(lexicalGlobalObject);
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ASSERT(callFrame->argumentCount());
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ASSERT(callFrame->lexicalGlobalObject(vm) == lexicalGlobalObject);
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auto* buffer = toUnsharedArrayBuffer(vm, callFrame->uncheckedArgument(0));
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if (!buffer) {
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auto scope = DECLARE_THROW_SCOPE(vm);
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throwDataCloneError(*lexicalGlobalObject, scope);
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return { };
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}
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if (mode == CloneMode::Partial) {
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ASSERT(callFrame->argumentCount() == 3);
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int srcByteOffset = static_cast<int>(callFrame->uncheckedArgument(1).toNumber(lexicalGlobalObject));
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int srcLength = static_cast<int>(callFrame->uncheckedArgument(2).toNumber(lexicalGlobalObject));
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return JSValue::encode(JSArrayBuffer::create(lexicalGlobalObject->vm(), lexicalGlobalObject->arrayBufferStructure(ArrayBufferSharingMode::Default), buffer->slice(srcByteOffset, srcByteOffset + srcLength)));
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}
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return JSValue::encode(JSArrayBuffer::create(lexicalGlobalObject->vm(), lexicalGlobalObject->arrayBufferStructure(ArrayBufferSharingMode::Default), ArrayBuffer::tryCreate(buffer->data(), buffer->byteLength())));
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}
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JSC_DEFINE_HOST_FUNCTION(cloneArrayBuffer, (JSGlobalObject* globalObject, CallFrame* callFrame))
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{
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return cloneArrayBufferImpl(globalObject, callFrame, CloneMode::Partial);
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}
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JSC_DEFINE_HOST_FUNCTION(structuredCloneForStream, (JSGlobalObject* globalObject, CallFrame* callFrame))
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{
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ASSERT(callFrame);
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ASSERT(callFrame->argumentCount());
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VM& vm = globalObject->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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JSValue value = callFrame->uncheckedArgument(0);
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if (value.inherits<JSArrayBuffer>(vm))
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RELEASE_AND_RETURN(scope, cloneArrayBufferImpl(globalObject, callFrame, CloneMode::Full));
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if (value.inherits<JSArrayBufferView>(vm)) {
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auto* bufferView = jsCast<JSArrayBufferView*>(value);
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ASSERT(bufferView);
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auto* buffer = bufferView->unsharedBuffer();
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if (!buffer) {
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throwDataCloneError(*globalObject, scope);
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return { };
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}
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auto bufferClone = ArrayBuffer::tryCreate(buffer->data(), buffer->byteLength());
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Structure* structure = bufferView->structure(vm);
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#define CLONE_TYPED_ARRAY(name) \
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do { \
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if (bufferView->inherits<JS##name##Array>(vm)) \
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RELEASE_AND_RETURN(scope, JSValue::encode(JS##name##Array::create(globalObject, structure, WTFMove(bufferClone), bufferView->byteOffset(), bufferView->length()))); \
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} while (0);
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FOR_EACH_TYPED_ARRAY_TYPE_EXCLUDING_DATA_VIEW(CLONE_TYPED_ARRAY)
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#undef CLONE_TYPED_ARRAY
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if (value.inherits<JSDataView>(vm))
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RELEASE_AND_RETURN(scope, JSValue::encode(JSDataView::create(globalObject, structure, WTFMove(bufferClone), bufferView->byteOffset(), bufferView->length())));
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}
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throwTypeError(globalObject, scope, "structuredClone not implemented for non-ArrayBuffer / non-ArrayBufferView"_s);
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return { };
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}
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} // namespace WebCore
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