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/*
* Copyright (C) 2013, 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 "JSArrayBufferConstructor.h"
#include "BuiltinNames.h"
#include "JSArrayBuffer.h"
#include "JSArrayBufferView.h"
#include "JSCInlines.h"
namespace JSC {
static EncodedJSValue JSC_HOST_CALL arrayBufferFuncIsView(JSGlobalObject*, CallFrame*);
static EncodedJSValue JSC_HOST_CALL callArrayBuffer(JSGlobalObject*, CallFrame*);
template<>
const ClassInfo JSArrayBufferConstructor::s_info = {
"Function", &Base::s_info, nullptr, nullptr,
CREATE_METHOD_TABLE(JSArrayBufferConstructor)
};
template<>
const ClassInfo JSSharedArrayBufferConstructor::s_info = {
"Function", &Base::s_info, nullptr, nullptr,
CREATE_METHOD_TABLE(JSSharedArrayBufferConstructor)
};
template<ArrayBufferSharingMode sharingMode>
JSGenericArrayBufferConstructor<sharingMode>::JSGenericArrayBufferConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callArrayBuffer, JSGenericArrayBufferConstructor<sharingMode>::constructArrayBuffer)
{
}
template<ArrayBufferSharingMode sharingMode>
void JSGenericArrayBufferConstructor<sharingMode>::finishCreation(VM& vm, JSArrayBufferPrototype* prototype, GetterSetter* speciesSymbol)
{
Base::finishCreation(vm, arrayBufferSharingModeName(sharingMode), NameAdditionMode::WithoutStructureTransition);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly);
putDirectNonIndexAccessorWithoutTransition(vm, vm.propertyNames->speciesSymbol, speciesSymbol, PropertyAttribute::Accessor | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
if (sharingMode == ArrayBufferSharingMode::Default) {
JSGlobalObject* globalObject = this->globalObject();
JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->isView, arrayBufferFuncIsView, static_cast<unsigned>(PropertyAttribute::DontEnum), 1);
JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->builtinNames().isViewPrivateName(), arrayBufferFuncIsView, static_cast<unsigned>(PropertyAttribute::DontEnum), 1);
}
}
template<ArrayBufferSharingMode sharingMode>
EncodedJSValue JSC_HOST_CALL JSGenericArrayBufferConstructor<sharingMode>::constructArrayBuffer(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* newTarget = asObject(callFrame->newTarget());
Structure* arrayBufferStructure = newTarget == callFrame->jsCallee()
? globalObject->arrayBufferStructure(sharingMode)
: InternalFunction::createSubclassStructure(globalObject, newTarget, getFunctionRealm(vm, newTarget)->arrayBufferStructure(sharingMode));
RETURN_IF_EXCEPTION(scope, { });
unsigned length;
if (callFrame->argumentCount()) {
length = callFrame->uncheckedArgument(0).toIndex(globalObject, "length");
RETURN_IF_EXCEPTION(scope, encodedJSValue());
} else {
// Although the documentation doesn't say so, it is in fact correct to say
// "new ArrayBuffer()". The result is the same as allocating an array buffer
// with a zero length.
length = 0;
}
auto buffer = ArrayBuffer::tryCreate(length, 1);
if (!buffer)
return JSValue::encode(throwOutOfMemoryError(globalObject, scope));
if (sharingMode == ArrayBufferSharingMode::Shared)
buffer->makeShared();
ASSERT(sharingMode == buffer->sharingMode());
JSArrayBuffer* result = JSArrayBuffer::create(vm, arrayBufferStructure, WTFMove(buffer));
return JSValue::encode(result);
}
template<ArrayBufferSharingMode sharingMode>
Structure* JSGenericArrayBufferConstructor<sharingMode>::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(InternalFunctionType, StructureFlags), info());
}
template<ArrayBufferSharingMode sharingMode>
const ClassInfo* JSGenericArrayBufferConstructor<sharingMode>::info()
{
return &JSGenericArrayBufferConstructor<sharingMode>::s_info;
}
static EncodedJSValue JSC_HOST_CALL callArrayBuffer(JSGlobalObject* globalObject, CallFrame*)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, scope, "ArrayBuffer"));
}
// ------------------------------ Functions --------------------------------
// ECMA 24.1.3.1
EncodedJSValue JSC_HOST_CALL arrayBufferFuncIsView(JSGlobalObject* globalObject, CallFrame* callFrame)
{
return JSValue::encode(jsBoolean(jsDynamicCast<JSArrayBufferView*>(globalObject->vm(), callFrame->argument(0))));
}
// Instantiate JSGenericArrayBufferConstructors.
template class JSGenericArrayBufferConstructor<ArrayBufferSharingMode::Shared>;
template class JSGenericArrayBufferConstructor<ArrayBufferSharingMode::Default>;
} // namespace JSC