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/*
* Copyright (C) 2016 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.
*
*/
#include "config.h"
#include "StructuredClone.h"
#include "JSDOMBinding.h"
#include "JSDOMExceptionHandling.h"
#include <JavaScriptCore/JSTypedArrays.h>
namespace WebCore {
using namespace JSC;
enum class CloneMode {
Full,
Partial,
};
static EncodedJSValue cloneArrayBufferImpl(JSGlobalObject* lexicalGlobalObject, CallFrame* callFrame, CloneMode mode)
{
VM& vm = lexicalGlobalObject->vm();
ASSERT(lexicalGlobalObject);
ASSERT(callFrame->argumentCount());
ASSERT(callFrame->lexicalGlobalObject(vm) == lexicalGlobalObject);
auto* buffer = toUnsharedArrayBuffer(vm, callFrame->uncheckedArgument(0));
if (!buffer) {
auto scope = DECLARE_THROW_SCOPE(vm);
throwDataCloneError(*lexicalGlobalObject, scope);
return { };
}
if (mode == CloneMode::Partial) {
ASSERT(callFrame->argumentCount() == 3);
int srcByteOffset = static_cast<int>(callFrame->uncheckedArgument(1).toNumber(lexicalGlobalObject));
int srcLength = static_cast<int>(callFrame->uncheckedArgument(2).toNumber(lexicalGlobalObject));
return JSValue::encode(JSArrayBuffer::create(lexicalGlobalObject->vm(), lexicalGlobalObject->arrayBufferStructure(ArrayBufferSharingMode::Default), buffer->slice(srcByteOffset, srcByteOffset + srcLength)));
}
return JSValue::encode(JSArrayBuffer::create(lexicalGlobalObject->vm(), lexicalGlobalObject->arrayBufferStructure(ArrayBufferSharingMode::Default), ArrayBuffer::tryCreate(buffer->data(), buffer->byteLength())));
}
JSC_DEFINE_HOST_FUNCTION(cloneArrayBuffer, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return cloneArrayBufferImpl(globalObject, callFrame, CloneMode::Partial);
}
JSC_DEFINE_HOST_FUNCTION(structuredCloneForStream, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
ASSERT(callFrame);
ASSERT(callFrame->argumentCount());
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue value = callFrame->uncheckedArgument(0);
if (value.inherits<JSArrayBuffer>())
RELEASE_AND_RETURN(scope, cloneArrayBufferImpl(globalObject, callFrame, CloneMode::Full));
if (value.inherits<JSArrayBufferView>()) {
auto* bufferView = jsCast<JSArrayBufferView*>(value);
ASSERT(bufferView);
auto* buffer = bufferView->unsharedBuffer();
if (!buffer) {
throwDataCloneError(*globalObject, scope);
return { };
}
auto bufferClone = ArrayBuffer::tryCreate(buffer->data(), buffer->byteLength());
Structure* structure = bufferView->structure();
#define CLONE_TYPED_ARRAY(name) \
do { \
if (bufferView->inherits<JS##name##Array>()) \
RELEASE_AND_RETURN(scope, JSValue::encode(JS##name##Array::create(globalObject, structure, WTFMove(bufferClone), bufferView->byteOffset(), bufferView->length()))); \
} while (0);
FOR_EACH_TYPED_ARRAY_TYPE_EXCLUDING_DATA_VIEW(CLONE_TYPED_ARRAY)
#undef CLONE_TYPED_ARRAY
if (value.inherits<JSDataView>())
RELEASE_AND_RETURN(scope, JSValue::encode(JSDataView::create(globalObject, structure, WTFMove(bufferClone), bufferView->byteOffset(), bufferView->length())));
}
throwTypeError(globalObject, scope, "structuredClone not implemented for non-ArrayBuffer / non-ArrayBufferView"_s);
return { };
}
} // namespace WebCore
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