blob: b9afac55b2f38f79e1dce94fe7ee41ac373fa619 [file] [log] [blame]
/*
* Copyright (C) 2015-2020 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 "ScopedArgumentsTable.h"
#include "JSCInlines.h"
namespace JSC {
const ClassInfo ScopedArgumentsTable::s_info = { "ScopedArgumentsTable", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(ScopedArgumentsTable) };
ScopedArgumentsTable::ScopedArgumentsTable(VM& vm)
: Base(vm, vm.scopedArgumentsTableStructure.get())
, m_length(0)
, m_locked(false)
{
}
ScopedArgumentsTable::~ScopedArgumentsTable()
{
}
void ScopedArgumentsTable::destroy(JSCell* cell)
{
static_cast<ScopedArgumentsTable*>(cell)->ScopedArgumentsTable::~ScopedArgumentsTable();
}
ScopedArgumentsTable* ScopedArgumentsTable::create(VM& vm)
{
ScopedArgumentsTable* result =
new (NotNull, allocateCell<ScopedArgumentsTable>(vm.heap)) ScopedArgumentsTable(vm);
result->finishCreation(vm);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::create(VM& vm, uint32_t length)
{
ScopedArgumentsTable* result = create(vm);
result->m_length = length;
result->m_arguments = ArgumentsPtr::create(length);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::tryCreate(VM& vm, uint32_t length)
{
void* buffer = tryAllocateCell<ScopedArgumentsTable>(vm.heap);
if (UNLIKELY(!buffer))
return nullptr;
ScopedArgumentsTable* result = new (NotNull, buffer) ScopedArgumentsTable(vm);
result->finishCreation(vm);
result->m_length = length;
result->m_arguments = ArgumentsPtr::tryCreate(length);
if (UNLIKELY(!result->m_arguments))
return nullptr;
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::clone(VM& vm)
{
ScopedArgumentsTable* result = create(vm, m_length);
for (unsigned i = m_length; i--;)
result->at(i) = this->at(i);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::setLength(VM& vm, uint32_t newLength)
{
if (LIKELY(!m_locked)) {
ArgumentsPtr newArguments = ArgumentsPtr::create(newLength, newLength);
for (unsigned i = std::min(m_length, newLength); i--;)
newArguments.at(i, newLength) = this->at(i);
m_length = newLength;
m_arguments = WTFMove(newArguments);
return this;
}
ScopedArgumentsTable* result = create(vm, newLength);
for (unsigned i = std::min(m_length, newLength); i--;)
result->at(i) = this->at(i);
return result;
}
static_assert(std::is_trivially_destructible<ScopeOffset>::value, "");
ScopedArgumentsTable* ScopedArgumentsTable::set(VM& vm, uint32_t i, ScopeOffset value)
{
ScopedArgumentsTable* result;
if (UNLIKELY(m_locked))
result = clone(vm);
else
result = this;
result->at(i) = value;
return result;
}
Structure* ScopedArgumentsTable::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
} // namespace JSC